CN106629643A - Method for reducing phosphorus ore by efficiently utilizing carbonaceous reducing agent and by kiln method to produce phosphoric acid and co-produce lightweight aggregate - Google Patents
Method for reducing phosphorus ore by efficiently utilizing carbonaceous reducing agent and by kiln method to produce phosphoric acid and co-produce lightweight aggregate Download PDFInfo
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- CN106629643A CN106629643A CN201611100430.6A CN201611100430A CN106629643A CN 106629643 A CN106629643 A CN 106629643A CN 201611100430 A CN201611100430 A CN 201611100430A CN 106629643 A CN106629643 A CN 106629643A
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- powder
- raw material
- conversion zone
- reducing agent
- rock phosphate
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- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 title claims abstract description 152
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 149
- 238000000034 method Methods 0.000 title claims abstract description 107
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 91
- 239000011574 phosphorus Substances 0.000 title claims abstract description 91
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 229910000147 aluminium phosphate Inorganic materials 0.000 title claims abstract description 77
- 239000000843 powder Substances 0.000 claims abstract description 468
- 238000006243 chemical reaction Methods 0.000 claims abstract description 366
- 239000002994 raw material Substances 0.000 claims abstract description 299
- 239000000463 material Substances 0.000 claims abstract description 198
- 238000005453 pelletization Methods 0.000 claims abstract description 162
- 238000000227 grinding Methods 0.000 claims abstract description 56
- 238000001354 calcination Methods 0.000 claims abstract description 49
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 28
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000001035 drying Methods 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract 4
- 229910052710 silicon Inorganic materials 0.000 claims abstract 4
- 239000010703 silicon Substances 0.000 claims abstract 4
- 239000002367 phosphate rock Substances 0.000 claims description 199
- 238000005215 recombination Methods 0.000 claims description 101
- 230000006798 recombination Effects 0.000 claims description 101
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 78
- DLYUQMMRRRQYAE-UHFFFAOYSA-N phosphorus pentoxide Inorganic materials O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 claims description 60
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 57
- 239000011148 porous material Substances 0.000 claims description 41
- 239000000292 calcium oxide Substances 0.000 claims description 39
- 235000012255 calcium oxide Nutrition 0.000 claims description 39
- 239000000377 silicon dioxide Substances 0.000 claims description 37
- 229910052681 coesite Inorganic materials 0.000 claims description 23
- 229910052906 cristobalite Inorganic materials 0.000 claims description 23
- 238000002360 preparation method Methods 0.000 claims description 23
- 229910052682 stishovite Inorganic materials 0.000 claims description 23
- 229910052905 tridymite Inorganic materials 0.000 claims description 23
- 239000000835 fiber Substances 0.000 claims description 14
- 239000000571 coke Substances 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 12
- 238000010792 warming Methods 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 235000019628 coolness Nutrition 0.000 claims description 8
- 235000019890 Amylum Nutrition 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 7
- 229920002472 Starch Polymers 0.000 claims description 7
- 239000002817 coal dust Substances 0.000 claims description 7
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 5
- 238000009423 ventilation Methods 0.000 claims description 5
- 239000003245 coal Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 14
- 239000008188 pellet Substances 0.000 abstract description 8
- 239000011575 calcium Substances 0.000 abstract description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052791 calcium Inorganic materials 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 3
- 238000003541 multi-stage reaction Methods 0.000 abstract 4
- 238000007873 sieving Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 98
- 238000006722 reduction reaction Methods 0.000 description 42
- 230000009467 reduction Effects 0.000 description 34
- 239000007789 gas Substances 0.000 description 29
- 241000288724 Talpa europaea Species 0.000 description 18
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 15
- 229910002091 carbon monoxide Inorganic materials 0.000 description 15
- 239000004567 concrete Substances 0.000 description 14
- 238000012216 screening Methods 0.000 description 12
- 229910019142 PO4 Inorganic materials 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 235000013312 flour Nutrition 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 230000036571 hydration Effects 0.000 description 6
- 238000006703 hydration reaction Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000011449 brick Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 4
- 239000010452 phosphate Substances 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 2
- 229910001634 calcium fluoride Inorganic materials 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- -1 phosphorus compound Chemical class 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 238000006479 redox reaction Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000011464 hollow brick Substances 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000010909 process residue Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/185—Preparation neither from elemental phosphorus or phosphoric anhydride nor by reacting phosphate-containing material with an acid, e.g. by reacting phosphate-containing material with an ion-exchange resin or an acid salt used alone
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/027—Lightweight materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for reducing phosphorus ore by efficiently utilizing a carbonaceous reducing agent and by a kiln method to produce phosphoric acid and co-produce lightweight aggregate. The method is characterized by comprising the steps: grinding raw materials; preparing first reaction layer raw materials consisting of phosphorus ore powder, silicon raw material powder or calcium raw material powder and carbonaceous reducing agent powder; putting the first reaction layer raw materials into a pelletizer, mixing uniformly and sieving to prepare a first reaction layer; preparing second reaction layer raw materials consisting of the phosphorus ore powder, the silicon raw material powder or the calcium raw material powder and pore-forming material powder; putting the first reaction layer raw materials and the second reaction layer raw materials into the pelletizer, and mixing uniformly to prepare composite reaction layer pelletizing green pellets; drying the composite reaction layer pelletizing green pellets, and feeding the composite reaction layer pelletizing green pellets into a kiln to calcine, wherein kiln gas generated during calcination is used for preparing the phosphoric acid; performing heat-insulating calcination on the composite reaction layer pellets and then cooling to obtain the lightweight aggregate. By adoption of the method, the use amount of the carbonaceous reducing agent in the pellets in the process of reducing the phosphorus ore by the kiln method can be effectively reduced, the problem of carbon burning loss in kiln-method phosphoric acid is effectively solved, and the utilization rate of the carbonaceous reducing agent in the pellets is increased.
Description
Technical field
The invention belongs to the Application way of the preparation of phosphorus compound and discarded object, is related to a kind of efficient utilization carbonaceous reducing agent
The method that kiln method reduces phosphorus ore phosphoric acid coproduction aglite.The present invention is especially suitable for adopting mid low grade phosphate rock for raw material
Kiln method reduction phosphorus ore prepare phosphoric acid, while obtain suitable for building material field preparation (lightweight) concrete aglite.
Background technology
In recent years, the economic fast development of China, the increase in demand of the energy and the raising of environmental consciousness, energy-conserving and environment-protective problem
Have become focus of attention.Meanwhile, China's phosphate rock resource deposit occupies the second in the world, but high-grade phosphate rock resource it is less, in
Low grade resource is in the majority.And phosphoric acid is used as a kind of important industrial chemicals, chemical industry, metallurgy, oil, electronics, medicine, food and
The field of agricultural is all widely used, and Chinese national economy development is played an important role.
At present, the technique of China's industrial production phosphoric acid all there are problems that it is a large amount of, wherein：1. it is high during phosphoric acid by wet process can only be utilized
Grade phosphorus mine preparing phosphoric acid, and in obtained phosphoric acid almost containing deliming in phosphorus ore beyond all impurity, purify complex process
And high cost, while wet processing can bring a large amount of reluctant ardealites, pollute environment；2. thermal phosphoric acid can be prepared
High-quality phosphoric acid, but capital equipment be electric arc furnaces, its high energy consumption, while high-grade phosphorus ore during the technique also can only be utilized.
In prior art, in order to solve the problems such as electric energy is nervous, ferro-sulphur ore is not enough and high-grade phosphorus ore is gradually decreased,
U.S. Occidental Research Corporation (ORC) in 20th century the eighties propose kiln-process phosphoric acid technique.Kiln
Method phosphoric acid process is, by the additional 1% bentonite mixed pelletizing of rock phosphate in powder, silica and carbonaceous reducing agent, to send into kiln forge after drying
Reduction is burnt, kiln temperature is controlled at 1400 DEG C～1500 DEG C, and the phosphorus in phosphorus ore is in the form of phosphorus steam from recombination reaction layer pelletizing
Middle reduction volatilization out, while air is passed through in the middle part of kiln is oxidized to phosphorus pentoxide by elemental phosphorous, aoxidizes released heat
Reduction reaction can be supplied to again, and the kiln gas Jing aquations containing phosphorus pentoxide absorb and phosphoric acid is obtained.The technique can effective land productivity
High-quality phosphoric acid is prepared with mid low grade phosphate rock reduction, little energy consumption, process is simple is provided simultaneously with, can rationally be utilized reaction heat.But
It is that substantial amounts of research shows that the technique still suffers from many problems, is difficult in the industrial practice of scale, and it is mainly showed
：
1. carbon scaling loss：Common pelletizing in for kiln-process phosphoric acid technique is by raw materials such as rock phosphate in powder, silica, carbonaceous reducing agents
Uniformly be mixed to prepare, before kiln temperature is increased to Phosphate ore reduction temperature in pelletizing carbonaceous reduction will with the oxygen in kiln,
Carbon dioxide etc. reacts, and causes most of carbonaceous reducing agent to shift to an earlier date scaling loss and fails to play a part of to reduce phosphorus ore, reduces phosphorus ore
Percent reduction；For the problem in kiln at present mostly by being passed through the protective gas such as nitrogen, increasing integument etc. just outside pelletizing
Method is solved, and be which greatly enhances kiln legal system and is taken phosphoric acid production cost.
2. residue is difficult to process：Many researchs are had been carried out in kiln-process phosphoric acid process residue process problem, but is not all taken
Obtain breakthrough substantially.2007, Hubei Sanxin Phosphoric Acid Co., Ltd. adopted tunnel furnace method technique, produced the kiloton of phosphoric acid 200 per year, empty
3.8 hundred million pieces of heart brick, refractory brick；But the material brick in the technique often occurs deformation, cracking after calcining reduction phosphorus ore in kiln, glues
Even the problems such as, the quality of hollow brick, refractory brick is reduced, the problem for failing to reach residue effectively utilizes.And it is most of at present
In kiln-process phosphoric acid technique productions, due to causing Phosphate ore reduction rate to reduce in pellet the problems such as carbon scaling loss, P in residual ball2O5Content is relative
Higher, this causes the residue in current kiln-process phosphoric acid technique to be used in cement as admixture, have impact on Slag recovering profit
Value.
Therefore, in order to be able to a great reserve of Mid-and low-grade phosphate rock resources of rational exploitation and utilization China, while reach energy-conservation subtracting
Row, the purpose of non-environmental-pollution.For the problem that kiln-process phosphoric acid technique is present, exploitation NEW TYPE OF COMPOSITE conversion zone technology solves kiln method
The big problem of common pelletizing carbonaceous reducing agent scaling loss and carbonaceous reducing agent consumption in phosphoric acid process simultaneously can rationally process utilization
Residue with meet kiln-process phosphoric acid production and development need be the further research direction in this area.
The content of the invention
The purpose of the present invention is intended to overcome deficiency of the prior art, there is provided a kind of efficient utilization carbonaceous reducing agent kiln method is also
The method of former phosphorus ore phosphoric acid coproduction aglite.Using the present invention, there is provided it is a kind of meet kiln-process phosphoric acid production needs with phosphorus
Ore deposit, siliceous or calcareous raw material, pore forming material wrap up phosphorus ore, carbonaceous reducing agent, siliceous or calcium for the second conversion zone of main component
The recombination reaction layer pelletizing of the first conversion zone of matter raw material, and the recombination reaction layer pelletizing can be while kiln method reduces phosphorus ore
Coproduction is applied to the aglite for preparing (lightweight) concrete；Using the present invention, in efficiently solving existing kiln-process phosphoric acid technique
The carbon burning problems of common pelletizing, improve the intensity of aglite；So as to reach high phosphorus ore percent reduction, low carbonaceous reducing agent
Consumption (carbonaceous reducing agent efficient utilization), residual ball can process utilization on the premise of, be China develop it is a great reserve of in it is low
Grade phosphorus mine resource provides a kind of new effective ways.
Present disclosure is：Efficient utilization carbonaceous reducing agent kiln method reduces the side of phosphorus ore phosphoric acid coproduction aglite
Method, is characterized in that comprising the following steps：
A, pretreatment of raw material：Grinding machine grinding (typically can be 40～80min) is put into after rock phosphate in powder is crushed, granularity is made
For D50≤ 25 μm of rock phosphate powder；By siliceous raw material or calcareous raw material put into respectively grinding machine grinding (typically can be 40～
60min), granularity is made for D50≤ 60 μm of siliceous raw material powder or calcareous raw material powder；By carbonaceous reducing agent input grinding machine grinding (
As can be 40～60min), make granularity for D50≤ 60 μm of carbonaceous reducing agent powder；Pore forming material is crushed, making granularity is
D50≤ 80 μm of pore forming material powder；
The siliceous raw material is silica, can be silica flour etc.；
The calcareous raw material is agstone or quick lime；
B, the first conversion zone raw material of outfit：
First conversion zone raw material is made up of rock phosphate powder, siliceous raw material powder or calcareous raw material powder and carbonaceous reducing agent powder,
Wherein：
The carbonaceous reducing agent powder consumption is with effective carbon (C) metering, the consumption of the rock phosphate powder in carbonaceous reducing agent powder
With P in rock phosphate powder2O5Material amount (i.e. mole) metering, the consumption of the siliceous raw material powder is with siliceous raw material powder
SiO2Material gauge amount, the consumption of the calcareous raw material powder is with the gauge amount of the material of CaO in calcareous raw material powder；
The amount of the material of the carbonaceous reducing agent powder measured with effective carbon is with P2O5The material of the rock phosphate powder of metering
6～9 times of amount；
It is described with SiO2The amount of the material of the siliceous raw material powder of metering is with P2O5The amount of the material of the rock phosphate powder of metering
0～10.5 times, the amount of the material of the calcareous raw material powder measured with CaO is with P2O5The amount of the material of the rock phosphate powder of metering
0～10.5 times；
C, the first conversion zone of preparation：
The first conversion zone raw material rock phosphate powder, siliceous raw material powder or calcareous raw material powder that step b is equipped with and carbonaceous are also
Pelletizing is well mixed in former agent powder input pelletizer, is sieved after 2～6 mesh sieves, oversize is obtained first reaction
Layer；
Carbonaceous reducing agent powder in first conversion zone be both as the reducing agent of rock phosphate powder in the first conversion zone with
There is reduction reaction in rock phosphate in powder；The carbon monoxide that simultaneously carbonaceous reducing agent reacts generation with rock phosphate in powder again can be used as the second conversion zone
The reducing agent of middle rock phosphate in powder reduction reaction；
The pelletizer is existing any kind of pelletizer, with disc balling machine as optimal selection；Used by the screening
Screening machine is existing any kind of screening machine；
D, the second conversion zone raw material of outfit：
Second conversion zone raw material is made up of rock phosphate powder, siliceous raw material powder or calcareous raw material powder and pore forming material powder, its
In：
The consumption of the rock phosphate powder is with P in rock phosphate powder2O5Material amount (i.e. mole) metering, the siliceous original
The consumption of feed powder is with SiO in siliceous raw material powder2Material gauge amount, the consumption of the calcareous raw material powder is with calcareous raw material powder
The gauge amount of the material of CaO；
It is described with SiO2The amount of the material of the siliceous raw material powder of metering is with P2O5The amount of the material of the rock phosphate powder of metering
0.3～10.5 times, the amount of the material of the calcareous raw material powder measured with CaO is with P2O5The material of the rock phosphate powder of metering
0.3～10.5 times of amount；
The consumption of the pore forming material powder is rock phosphate powder and siliceous raw material powder or calcareous raw material powder (rock phosphate powder and siliceous
Raw material powder or calcareous raw material powder are：Rock phosphate powder and siliceous raw material powder or rock phosphate powder and calcareous raw material powder, afterwards together) gross mass
0～15%；
The pore forming material is natural plant fibre, plant amylum, coal dust, coke blacking, organic fiber and any high temperature
Under the mixture of any one or more in combustible (graininess and threadiness) material；
E, preparation have the recombination reaction layer pelletizing green-ball of outside second conversion zone：
The first conversion zone and the second conversion zone raw material are taken, with P in the second conversion zone raw material2O5The thing of the rock phosphate powder of metering
The amount of matter is with P in the first conversion zone2O50.5～1 times of the amount of the material of the rock phosphate powder of metering；
Pelletizing pelletizing will be well mixed in first conversion zone and the second conversion zone raw material input pelletizer, that is, being obtained has outside
The recombination reaction layer pelletizing green-ball of the second conversion zone；
The pelletizer is any kind of pelletizer, with disc balling machine as optimal selection；
The conversion zone of inside first of the recombination reaction layer pelletizing green-ball for having outside second conversion zone is both the reduction of kiln method
The first reaction zone during rock phosphate in powder；The carbon monoxide that simultaneously carbonaceous reducing agent reacts generation with rock phosphate in powder again can be used as recombination reaction
The reducing agent of rock phosphate in powder in the second conversion zone outside layer pelletizing；
The conversion zone of outside second of the recombination reaction layer pelletizing green-ball for having outside second conversion zone is both as inside
The protective layer of carbonaceous reducing agent in first conversion zone, prevents going out for carbon burning problems in recombination reaction layer the first conversion zone of pelletizing
It is existing；The second reaction zone of rock phosphate in powder is reduced when reducing rock phosphate in powder but also as kiln method；Meanwhile, add in outside second conversion zone
Pore forming material form hole after combustion and be both easy to product that recombination reaction layer pelletizing is delivered to from inside recombination reaction layer pelletizing
Outside, also increases the contact area of phosphorus ore in the reducing agent material and the second conversion zone produced in the first conversion zone；
The conversion zone of outside second of the recombination reaction layer pelletizing green-ball for having outside second conversion zone is by using first
The carbon monoxide that carbonaceous reducing agent phosphorus ore is produced in conversion zone carries out the reduction of phosphorus ore in the second conversion zone, it is achieved thereby that
The efficient utilization of carbonaceous reducing agent, and reduce the consumption of carbonaceous reducing agent in recombination reaction layer pelletizing；
The green-ball of f, dry composite conversion zone pelletizing：The obtained recombination reaction layer pelletizing for having outside second conversion zone is given birth to
Ball is sent into drying equipment, and at a temperature of 100 DEG C～110 DEG C 6h～12h is dried, and obtains recombination reaction layer pelletizing；The drying
Equipment is existing any kind of drying equipment；
G, recombination reaction layer pelletizing enter kiln calcining：Recombination reaction layer pelletizing is sent into kiln, with 5 DEG C/min～20 DEG C/min
Programming rate be to be warming up to 1200 DEG C～1350 DEG C, and insulation calcining (reduction phosphorus ore, time at 1200 DEG C～1350 DEG C
For) 3～5h, the kiln gas of generation is used to prepare phosphoric acid in calcining；After the warm calcining of recombination reaction layer pelletizing, then Jing naturally cold
But, that is, aglite is obtained；
The aglite for obtaining have porous, lightweight, surface strength it is high, without hollow-core construction the characteristics of, and the aglite
Unit weight and intensity meet standard GB/T/T17431.1-2010《Light-weight aggregate and experimental technique》；Can be used to build as aggregate
Lightweight concrete is prepared in Material Field.
In present disclosure：With SiO described in step b2The amount of the material of the siliceous raw material powder of metering is preferably with P2O5
0.3～9 times of the amount of the material of the rock phosphate powder of metering, the amount of the material of the calcareous raw material powder measured with CaO is preferable
It is with P2O50.3～9 times of the amount of the material of the rock phosphate powder of metering.
In present disclosure：The consumption of pore forming material powder described in step d is preferably rock phosphate powder and siliceous raw material powder
Or calcareous raw material powder (rock phosphate powder and siliceous raw material powder or calcareous raw material powder are：Rock phosphate powder and siliceous raw material powder or rock phosphate in powder
The 3%～10% of gross mass powder and calcareous raw material powder, afterwards together).
In present disclosure：Carbonaceous reducing agent described in step a can for coke or coal or other carbonaceous materials (including
Biological material).
The method that efficient utilization carbonaceous reducing agent kiln method described in present invention reduces phosphorus ore phosphoric acid coproduction aglite,
It is characterized in that comprising the following steps：To prevent the phosphorus after reducing from returning suction, need to ensure in barotropic state in kiln, can be right
The means such as forced ventilation or natural air exhaust are adopted in kiln described in step g；Wherein, forced ventilation is referred to using plant equipment such as blower fans
Order about gas flowing in kiln；Natural air exhaust refers to that the draft produced using chimney makes gas flowing in kiln.
In present disclosure：Rock phosphate in powder described in step a can be the phosphorus of any grade in high, medium and low grade phosphorus mine
Ore.
The method that efficient utilization carbonaceous reducing agent kiln method described in present invention reduces phosphorus ore phosphoric acid coproduction aglite,
Can also comprise the following steps (kiln gas produced in calcining described in step g is used to prepare the concrete grammar step of phosphoric acid)：
Kiln gas relieving haperacidity：Pelletizing is entered the kiln gas produced in kiln calcining (reduction phosphorus ore) hydration chamber is sent into after purified treatment
And aquation absorbs preparing phosphoric acid in absorption tower；Concrete grammar is；Pelletizing enter kiln calcining (reduction phosphorus ore) kiln gas that obtains mainly into
It is divided into P2O5、CO2, kiln gas is removed into CO through purified treatment2Pure phosphoric anhydride (P is obtained afterwards2O5) gas；Pure phosphoric anhydride
Gas in hydration chamber with spray under phosphoric acid,diluted (mass percent concentration be 50%～70%H3PO4The aqueous solution) meet into water-filling
Change reaction and generate phosphoric acid；The acid mist produced in hydration process is entered in absorption tower and generates phosphorus with the phosphoric acid,diluted reaction under tower top spray
Acid；Aquation is absorbed and obtain finished product phosphoric acid after the phosphoric acid feeding storage acid tank cooling for obtaining；The concrete grammar is compared with technology.
Compared with prior art, the present invention has following features and beneficial effect：
(1) using the present invention, the recombination reaction layer pelletizing knot of internal first conversion zone of outside second conversion zone parcel is formed
Structure, the second conversion zone of the recombination reaction layer pelletizing is effectively protected to the carbonaceous reducing agent in the first conversion zone；
(2) using the present invention, the reducing agent carbon monoxide needed for composite pellet external reaction layer is by internal-response layer phosphorus ore
Produce with carbonaceous reducing agent reaction, carbonaceous reducing agent reduces phosphorus ore in kiln method in the first conversion zone of recombination reaction layer pelletizing inside
Simultaneously lasting generation carbon monoxide can be stablized, reduce phosphorus ore for the second conversion zone and sufficient stable reducing agent is provided, so as to
Efficiently solve the problems, such as that carbon monoxide growing amount is restricted by furnace air flow velocity in prior art kiln method preparing phosphoric acid；
(3) using the present invention, the first reaction inside recombination reaction layer pelletizing can be reduction in outside second conversion zone
The reducing agent that phosphorus ore provides reducing agent, and the first conversion zone and provides for the second conversion zone reduction phosphorus ore is in the first conversion zone
The carbon monoxide produced during carbonaceous reducing agent phosphorus ore；Carbonaceous is realized in recombination reaction layer pelletizing also by the technological approaches
The efficient utilization of former agent, reduces the actual amount of carbonaceous reducing agent in recombination reaction layer pelletizing；
(4) using the present invention, the second conversion zone outside recombination reaction layer pelletizing not only plays the first conversion zone of parcel
Protect carbonaceous reducing agent therein, prevent the effect of its scaling loss, while the second conversion zone also can be using carbon in the first conversion zone
The carbon monoxide produced during matter reducing agent reduction phosphorus ore reduces the phosphorus ore in the second conversion zone as reducing agent kiln method；
(5) the obtained recombination reaction layer pelletizing of present invention coproduction aglite in kiln method reduction phosphorus ore, solves existing
Pelletizing forms hollow-core construction and produces the problem for affecting to its intensity after technology kiln method relieving haperacidity, improves the intensity of final aglite
(meet GB GB/T 17431.1-2010《Light-weight aggregate and its experimental technique》)；Concrete neck can be applied to as aglite
Domain, so as to efficiently solve residue bulk deposition in existing kiln-process phosphoric acid technique simultaneously, becomes discarded object and is difficult to process profit
With, and destroy ecological environment, cause the problem of environmental pollution；
(6) reaction mechanism of the invention is：
1. the reaction mechanism in the first conversion zone：
Ca10(PO4)6F2+15C+9·z(SiO2)→3P2+15CO+9[CaO·(SiO2)z]+CaF2 (1-1)
Wherein, z >=0；
2. the reaction mechanism in the second conversion zone：
Ca10(PO4)6F2+15CO+9·z(SiO2)→3P2+15CO2+9[CaO·(SiO2)z]+CaF2 (1-2)
Wherein, z >=0；
In above-mentioned 2 reaction equations, reaction equation (1-1) is the phosphorus ore in the first conversion zone under the quick reduction temperature of phosphorus ore
The redox reaction that stone flour occurs with carbonaceous reducing agent, coke is elemental phosphorous as reducing agent reduction phosphorus ore generation, while producing
Reducing agent --- the carbon monoxide needed for phosphorus ore is reduced in second conversion zone；Reaction equation (1-2) is that carbonaceous is also in the first conversion zone
When the CO that reaction is produced during former agent reduction phosphorus ore is by outside second conversion zone, the oxidation carried out with the phosphorus ore in the second conversion zone
Reduction reaction, carbon monoxide is elemental phosphorous with the phosphorus ore reaction generation in the second conversion zone as reducing agent；
(7) using the present invention, binding agent is substituted with phosphorus ore in the first conversion zone of recombination reaction layer pelletizing and is reduced with carbonaceous
Agent mixes, and can obtain the good mixture of plasticity, and this is because phosphorus ore inherently has good plasticity and caking property；
Simultaneously phosphorus ore also can at high temperature carry out redox reaction with the homogeneous mixture of carbonaceous reducing agent；
(8) product preparation process of the present invention is simple, and operation is easy, and easily operation, is particularly suitable for use with middle-low grade phosphorus
Ore deposit for raw material kiln method prepare phosphoric acid, while obtain higher intensity suitable for prepare (lightweight) concrete aglite, will
It is practical with obvious economic benefit and social benefit.
Description of the drawings
Fig. 1 is the structural representation of recombination reaction layer pelletizing in the inventive method；
In Fig. 1：1-the first conversion zone, the 2-the second conversion zone, 2-1-pore forming material；
Fig. 2 is the process chart that kiln method of the present invention reduces phosphorus ore；
Fig. 3 is the heat analysis collection of illustrative plates of the first conversion zone of recombination reaction layer pelletizing in the present invention；From the figure 3, it may be seen that when compound anti-
Answer the CaO/SiO of the conversion zone of layer pelletizing first2=1.55, n (C)/5n (P2O5During)=1.4, the temperature of phosphorus ore initial reduction exists
1200 DEG C or so, the temperature that phosphorus ore is quickly reduced is at 1260 DEG C or so.
Specific embodiment
The invention will be further described for example given below plan, but is not to be construed as to the scope of the present invention
Restriction, some nonessential improvement and tune that person skilled in art makes according to the content of the invention described above to the present invention
It is whole, still fall within protection scope of the present invention.
Embodiment 1：
The method that efficient utilization carbonaceous reducing agent kiln method reduces phosphorus ore phosphoric acid coproduction aglite, comprises the following steps：
A, pretreatment of raw material：Grinding machine grinding is put into after rock phosphate in powder is crushed, granularity is made for D50≤ 25 μm of rock phosphate powder；
Siliceous raw material is put into respectively grinding machine grinding, granularity is made for D50≤ 60 μm of siliceous raw material powder；Carbonaceous reducing agent input is ground
Machine grinding, makes granularity for D50≤ 60 μm of carbonaceous reducing agent powder；Pore forming material is crushed, granularity is made for D50≤ 80 μm
Pore forming material powder；
The siliceous raw material is silica, can be silica flour；
B, the first conversion zone raw material of outfit：
First conversion zone raw material is made up of rock phosphate powder, siliceous raw material powder and carbonaceous reducing agent powder, wherein：
The carbonaceous reducing agent powder consumption is with effective carbon (C) metering, the consumption of the rock phosphate powder in carbonaceous reducing agent powder
With P in rock phosphate powder2O5Material amount (i.e. mole) metering, the consumption of the siliceous raw material powder is with siliceous raw material powder
SiO2Material gauge amount；
The amount of the material of the carbonaceous reducing agent powder measured with effective carbon is with P2O5The material of the rock phosphate powder of metering
7.5 times of amount；
It is described with SiO2The amount of the material of the siliceous raw material powder of metering is with P2O5The amount of the material of the rock phosphate powder of metering
5 times；
C, the first conversion zone of preparation：
The first conversion zone raw material rock phosphate powder, siliceous raw material powder and the carbonaceous reducing agent powder input that step b is equipped with is made
Pelletizing is well mixed in ball machine, is sieved after 2～6 mesh sieves, oversize is obtained first conversion zone；
Carbonaceous reducing agent powder in first conversion zone be both as the reducing agent of rock phosphate powder in the first conversion zone with
There is reduction reaction in rock phosphate in powder；The carbon monoxide that simultaneously carbonaceous reducing agent reacts generation with rock phosphate in powder again can be used as the second conversion zone
The reducing agent of middle rock phosphate in powder reduction reaction；
The pelletizer is existing any kind of pelletizer, with disc balling machine as optimal selection；Used by the screening
Screening machine is existing any kind of screening machine；
D, the second conversion zone raw material of outfit：
Second conversion zone raw material is made up of rock phosphate powder, siliceous raw material powder and pore forming material powder, wherein：
The consumption of the rock phosphate powder is with P in rock phosphate powder2O5Material amount (i.e. mole) metering, the siliceous original
The consumption of feed powder is with SiO in siliceous raw material powder2Material gauge amount；
It is described with SiO2The amount of the material of the siliceous raw material powder of metering is with P2O5The amount of the material of the rock phosphate powder of metering
5 times；
The consumption of the pore forming material powder is rock phosphate powder and siliceous raw material powder or calcareous raw material powder (rock phosphate powder and siliceous
Raw material powder or calcareous raw material powder are：Rock phosphate powder and siliceous raw material powder or rock phosphate powder and calcareous raw material powder, afterwards together) gross mass
8%；
The pore forming material is natural plant fibre, plant amylum, coal dust, coke blacking, organic fiber and any high temperature
Under the mixture of any one or more in combustible (graininess and threadiness) material；
E, preparation have the recombination reaction layer pelletizing green-ball of outside second conversion zone：
The first conversion zone and the second conversion zone raw material are taken, with P in the second conversion zone raw material2O5The thing of the rock phosphate powder of metering
The amount of matter is with P in the first conversion zone2O50.8 times of the amount of the material of the rock phosphate powder of metering；
Pelletizing pelletizing will be well mixed in first conversion zone and the second conversion zone raw material input pelletizer, that is, being obtained has outside
The recombination reaction layer pelletizing green-ball of the second conversion zone；
The pelletizer is any kind of pelletizer, with disc balling machine as optimal selection；
The conversion zone of inside first of the recombination reaction layer pelletizing green-ball for having outside second conversion zone is both the reduction of kiln method
The first reaction zone during rock phosphate in powder；The carbon monoxide that simultaneously carbonaceous reducing agent reacts generation with rock phosphate in powder again can be used as recombination reaction
The reducing agent of rock phosphate in powder in the second conversion zone outside layer pelletizing；
The conversion zone of outside second of the recombination reaction layer pelletizing green-ball for having outside second conversion zone is both as inside
The protective layer of carbonaceous reducing agent in first conversion zone, prevents going out for carbon burning problems in recombination reaction layer the first conversion zone of pelletizing
It is existing；The second reaction zone of rock phosphate in powder is reduced when reducing rock phosphate in powder but also as kiln method；Meanwhile, add in outside second conversion zone
Pore forming material form hole after combustion and be both easy to product that recombination reaction layer pelletizing is delivered to from inside recombination reaction layer pelletizing
Outside, also increases the contact area of phosphorus ore in the reducing agent material and the second conversion zone produced in the first conversion zone；
The conversion zone of outside second of the recombination reaction layer pelletizing green-ball for having outside second conversion zone is by using first
The carbon monoxide that carbonaceous reducing agent phosphorus ore is produced in conversion zone carries out the reduction of phosphorus ore in the second conversion zone, it is achieved thereby that
The efficient utilization of carbonaceous reducing agent, and reduce the consumption of carbonaceous reducing agent in recombination reaction layer pelletizing.
The green-ball of f, dry composite conversion zone pelletizing：The obtained recombination reaction layer pelletizing for having outside second conversion zone is given birth to
Ball is sent into drying equipment, and at a temperature of 105 DEG C 9h is dried, and obtains recombination reaction layer pelletizing；The drying equipment is existing
The drying equipment of what type；
G, recombination reaction layer pelletizing enter kiln calcining：Recombination reaction layer pelletizing is sent into kiln, with the intensification speed of 12 DEG C/min
Spend and be, be warming up to 1280 DEG C, and insulation calcining (reduction phosphorus ore, the time be) 4h at 1280 DEG C, the kiln gas produced in calcining is used
In preparing phosphoric acid；After the warm calcining of recombination reaction layer pelletizing, then Jing natural coolings, that is, obtain aglite；
The aglite for obtaining have porous, lightweight, surface strength it is high, without hollow-core construction the characteristics of, and the aglite
Unit weight and intensity meet standard GB/T/T17431.1-2010《Light-weight aggregate and experimental technique》；Can be used to build as aggregate
Lightweight concrete is prepared in Material Field.
Embodiment 2：
The method that efficient utilization carbonaceous reducing agent kiln method reduces phosphorus ore phosphoric acid coproduction aglite, comprises the following steps：
A, pretreatment of raw material：Grinding machine grinding is put into after rock phosphate in powder is crushed, granularity is made for D50≤ 25 μm of rock phosphate powder；
Siliceous raw material is put into respectively grinding machine grinding, granularity is made for D50≤ 60 μm of siliceous raw material powder；Carbonaceous reducing agent input is ground
Machine grinding, makes granularity for D50≤ 60 μm of carbonaceous reducing agent powder；Pore forming material is crushed, granularity is made for D50≤ 80 μm
Pore forming material powder；
The siliceous raw material is silica, can be silica flour；
B, the first conversion zone raw material of outfit：
First conversion zone raw material is made up of rock phosphate powder and carbonaceous reducing agent powder, wherein：
The carbonaceous reducing agent powder consumption is with effective carbon (C) metering, the consumption of the rock phosphate powder in carbonaceous reducing agent powder
With P in rock phosphate powder2O5Material amount (i.e. mole) metering；
The amount of the material of the carbonaceous reducing agent powder measured with effective carbon is with P2O5The material of the rock phosphate powder of metering
6 times of amount；
C, the first conversion zone of preparation：
Mixing in the first conversion zone raw material rock phosphate powder that step b is equipped with and carbonaceous reducing agent powder input pelletizer
Uniform pelletizing pelletizing, is sieved after 2～6 mesh sieves, and oversize is obtained first conversion zone；
D, the second conversion zone raw material of outfit：
Second conversion zone raw material is made up of rock phosphate powder, siliceous raw material powder or calcareous raw material powder, wherein：
The consumption of the rock phosphate powder is with P in rock phosphate powder2O5Material amount (i.e. mole) metering, the siliceous original
The consumption of feed powder is with SiO in siliceous raw material powder2Material gauge amount；
It is described with SiO2The amount of the material of the siliceous raw material powder of metering is with P2O5The amount of the material of the rock phosphate powder of metering
0.3 times；
E, preparation have the recombination reaction layer pelletizing green-ball of outside second conversion zone：
The first conversion zone and the second conversion zone raw material are taken, with P in the second conversion zone raw material2O5The thing of the rock phosphate powder of metering
The amount of matter is with P in the first conversion zone2O50.5 times of the amount of the material of the rock phosphate powder of metering；
Pelletizing pelletizing will be well mixed in first conversion zone and the second conversion zone raw material input pelletizer, that is, being obtained has outside
The recombination reaction layer pelletizing green-ball of the second conversion zone；
The green-ball of f, dry composite conversion zone pelletizing：The recombination reaction layer pelletizing green-ball for having outside second conversion zone is sent into
In drying equipment, 12h is dried at a temperature of 100 DEG C, obtains recombination reaction layer pelletizing；
G, recombination reaction layer pelletizing enter kiln calcining：Recombination reaction layer pelletizing is sent into kiln, with the programming rate of 5 DEG C/min
For, it is warming up to 1200 DEG C, and insulation calcining (reduction phosphorus ore, the time be) 5h at 1200 DEG C, the kiln gas produced in calcining is used for
Prepare phosphoric acid；After the warm calcining of recombination reaction layer pelletizing, then Jing natural coolings, that is, obtain aglite；
The other the same as in Example 1, omits.
Embodiment 3：
The method that efficient utilization carbonaceous reducing agent kiln method reduces phosphorus ore phosphoric acid coproduction aglite, comprises the following steps：
A, pretreatment of raw material：Grinding machine grinding is put into after rock phosphate in powder is crushed, granularity is made for D50≤ 25 μm of rock phosphate powder；
Siliceous raw material or calcareous raw material are put into respectively grinding machine grinding, granularity is made for D50≤ 60 μm of siliceous raw material powder or calcareous raw material
Powder；Carbonaceous reducing agent is put into grinding machine grinding, granularity is made for D50≤ 60 μm of carbonaceous reducing agent powder；Pore forming material is crushed,
Granularity is made for D50≤ 80 μm of pore forming material powder；
The siliceous raw material is silica, can be silica flour；
The calcareous raw material is agstone or quick lime；
B, the first conversion zone raw material of outfit：
First conversion zone raw material is made up of rock phosphate powder, siliceous raw material powder or calcareous raw material powder and carbonaceous reducing agent powder,
Wherein：
The carbonaceous reducing agent powder consumption is with effective carbon (C) metering, the consumption of the rock phosphate powder in carbonaceous reducing agent powder
With P in rock phosphate powder2O5Material amount (i.e. mole) metering, the consumption of the siliceous raw material powder is with siliceous raw material powder
SiO2Material gauge amount, the consumption of the calcareous raw material powder is with the gauge amount of the material of CaO in calcareous raw material powder；
The amount of the material of the carbonaceous reducing agent powder measured with effective carbon is with P2O5The material of the rock phosphate powder of metering
9 times of amount；
It is described with SiO2The amount of the material of the siliceous raw material powder of metering is with P2O5The amount of the material of the rock phosphate powder of metering
10.5 times, the amount of the material of the calcareous raw material powder measured with CaO is with P2O5The amount of the material of the rock phosphate powder of metering
10.5 times；
C, the first conversion zone of preparation：
The first conversion zone raw material rock phosphate powder, siliceous raw material powder or calcareous raw material powder that step b is equipped with and carbonaceous are also
Pelletizing pelletizing is well mixed in former agent powder input pelletizer, is sieved after 2～6 mesh sieves, oversize is obtained first
Conversion zone；
D, the second conversion zone raw material of outfit：
Second conversion zone raw material is made up of rock phosphate powder, siliceous raw material powder or calcareous raw material powder and pore forming material powder, its
In：
The consumption of the rock phosphate powder is with P in rock phosphate powder2O5Material amount (i.e. mole) metering, the siliceous original
The consumption of feed powder is with SiO in siliceous raw material powder2Material gauge amount, the consumption of the calcareous raw material powder is with calcareous raw material powder
The gauge amount of the material of CaO；
It is described with SiO2The amount of the material of the siliceous raw material powder of metering is with P2O5The amount of the material of the rock phosphate powder of metering
10.5 times, the amount of the material of the calcareous raw material powder measured with CaO is with P2O5The amount of the material of the rock phosphate powder of metering
10.5 times；
The consumption of the pore forming material powder is the 15% of rock phosphate powder and siliceous raw material powder or calcareous raw material powder gross mass；
The pore forming material is natural plant fibre, plant amylum, coal dust, coke blacking, organic fiber and any high temperature
Under the mixture of any one or more in combustible (graininess and threadiness) material；
E, preparation have the recombination reaction layer pelletizing green-ball of outside second conversion zone：
The first conversion zone and the second conversion zone raw material are taken, with P in the second conversion zone raw material2O5The thing of the rock phosphate powder of metering
The amount of matter is with P in the first conversion zone2O51 times of the amount of the material of the rock phosphate powder of metering；
Pelletizing pelletizing will be well mixed in first conversion zone and the second conversion zone raw material input pelletizer, that is, being obtained has outside
The recombination reaction layer pelletizing green-ball of the second conversion zone；
The green-ball of f, dry composite conversion zone pelletizing：The recombination reaction layer pelletizing green-ball for having outside second conversion zone is sent into
In drying equipment, 6h is dried at a temperature of 110 DEG C, obtains recombination reaction layer pelletizing；
G, recombination reaction layer pelletizing enter kiln calcining：Recombination reaction layer pelletizing is sent into kiln, with the intensification speed of 20 DEG C/min
Spend and be, be warming up to 1350 DEG C, and insulation calcining (reduction phosphorus ore, the time be) 3h at 1350 DEG C, the kiln gas produced in calcining is used
In preparing phosphoric acid；After the warm calcining of recombination reaction layer pelletizing, then Jing natural coolings, that is, obtain aglite；
The other the same as in Example 1, omits.
Embodiment 4～9：
The method that efficient utilization carbonaceous reducing agent kiln method reduces phosphorus ore phosphoric acid coproduction aglite, comprises the following steps：
A, pretreatment of raw material：Grinding machine grinding is put into after rock phosphate in powder is crushed, granularity is made for D50≤ 25 μm of rock phosphate powder；
Siliceous raw material or calcareous raw material are put into respectively grinding machine grinding, granularity is made for D50≤ 60 μm of siliceous raw material powder or calcareous raw material
Powder；Carbonaceous reducing agent is put into grinding machine grinding, granularity is made for D50≤ 60 μm of carbonaceous reducing agent powder；Pore forming material is crushed,
Granularity is made for D50≤ 80 μm of pore forming material powder；
The siliceous raw material is silica, can be silica flour；
The calcareous raw material is agstone or quick lime；
B, the first conversion zone raw material of outfit：
First conversion zone raw material is made up of rock phosphate powder, siliceous raw material powder or calcareous raw material powder and carbonaceous reducing agent powder,
Wherein：
The carbonaceous reducing agent powder consumption is with effective carbon (C) metering, the consumption of the rock phosphate powder in carbonaceous reducing agent powder
With P in rock phosphate powder2O5Material amount (i.e. mole) metering, the consumption of the siliceous raw material powder is with siliceous raw material powder
SiO2Material gauge amount, the consumption of the calcareous raw material powder is with the gauge amount of the material of CaO in calcareous raw material powder；
The amount of the material of the carbonaceous reducing agent powder measured with effective carbon is with P2O5The material of the rock phosphate powder of metering
6～9 times (embodiment 4～9 is respectively 6.5,7,7.5,8,8.3,8.6 times) of amount；
It is described with SiO2The amount of the material of the siliceous raw material powder of metering is with P2O5The amount of the material of the rock phosphate powder of metering
0～10.5 times (embodiment 4～9 is respectively 3,4,6,7,8,9 times), the amount of the material of the calcareous raw material powder measured with CaO
It is with P2O50～10.5 times (embodiment 4～9 is respectively 3,4,6,7,8,9 times) of the amount of the material of the rock phosphate powder of metering；
C, the first conversion zone of preparation：
The first conversion zone raw material rock phosphate powder, siliceous raw material powder or calcareous raw material powder that step b is equipped with and carbonaceous are also
Pelletizing pelletizing is well mixed in former agent powder input pelletizer, is sieved after 2～6 mesh sieves, oversize is obtained first
Conversion zone；
D, the second conversion zone raw material of outfit：
Second conversion zone raw material is made up of rock phosphate powder, siliceous raw material powder or calcareous raw material powder and pore forming material powder, its
In：
The consumption of the rock phosphate powder is with P in rock phosphate powder2O5Material amount (i.e. mole) metering, the siliceous original
The consumption of feed powder is with SiO in siliceous raw material powder2Material gauge amount, the consumption of the calcareous raw material powder is with calcareous raw material powder
The gauge amount of the material of CaO；
It is described with SiO2The amount of the material of the siliceous raw material powder of metering is with P2O5The amount of the material of the rock phosphate powder of metering
0.3～10.5 times (embodiment 4～9 is respectively 3,4,6,7,8,9 times), the material of the calcareous raw material powder measured with CaO
Amount is with P2O5(embodiment 4～9 is respectively 3,4,6,7,8,9 to 0.3～10.5 times of the amount of the material of the rock phosphate powder of metering
Times)；
The consumption of the pore forming material powder is the 0～15% of rock phosphate powder and siliceous raw material powder or calcareous raw material powder gross mass
(embodiment 4～9 is respectively 3,5,6,8,10,12 times)；
The pore forming material is natural plant fibre, plant amylum, coal dust, coke blacking, organic fiber and any high temperature
Under the mixture of any one or more in combustible (graininess and threadiness) material；
E, preparation have the recombination reaction layer pelletizing green-ball of outside second conversion zone：
The first conversion zone and the second conversion zone raw material are taken, with P in the second conversion zone raw material2O5The thing of the rock phosphate powder of metering
The amount of matter is with P in the first conversion zone2O5(embodiment 4～9 is respectively 0.5～1 times of the amount of the material of the rock phosphate powder of metering
0.6、0.7、0.8、0.8、0.9、0.9)；
Pelletizing pelletizing will be well mixed in first conversion zone and the second conversion zone raw material input pelletizer, that is, being obtained has outside
The recombination reaction layer pelletizing green-ball of the second conversion zone；
The green-ball of f, dry composite conversion zone pelletizing：The obtained recombination reaction layer pelletizing for having outside second conversion zone is given birth to
Ball is sent into drying equipment, and any time in 6h～12h is dried at arbitrary temperature in 100 DEG C～110 DEG C, obtains recombination reaction
Layer pelletizing；
G, recombination reaction layer pelletizing enter kiln calcining：Recombination reaction layer pelletizing is sent into kiln, with 5 DEG C/min～20 DEG C/min
In arbitrary programming rate be warming up to 1200 DEG C～1350 DEG C in it is arbitrary, and be incubated calcining (reduction phosphorus ore, time be) 3～
Arbitrary in 5h, the kiln gas produced in calcining is used to prepare phosphoric acid；After the warm calcining of recombination reaction layer pelletizing, then Jing naturally cold
But, that is, aglite is obtained；
The other the same as in Example 1, omits.
Embodiment 10：
A kind of method that efficient utilization carbonaceous reducing agent kiln method reduces phosphorus ore phosphoric acid coproduction aglite, including it is following
Step：
A, pretreatment of raw material：Grinding machine grinding is put into after rock phosphate in powder is crushed, granularity is made for D50≤ 25 μm of rock phosphate powder；
Calcareous raw material is put into grinding machine grinding, granularity is made for D50≤ 60 μm of calcareous raw material powder；Carbonaceous reducing agent is put into grinding machine powder
Mill, makes granularity for D50≤ 60 μm of carbonaceous reducing agent powder；
The calcareous raw material is agstone；
B, the first conversion zone raw material of outfit：
First conversion zone raw material is made up of rock phosphate powder, calcareous raw material powder and carbonaceous reducing agent powder, wherein：
The carbonaceous reducing agent powder consumption is with effective carbon (C) metering, the consumption of the rock phosphate powder in carbonaceous reducing agent powder
With P in rock phosphate powder2O5Material amount (i.e. mole) metering, the consumption of the calcareous raw material powder is with CaO in calcareous raw material powder
Material gauge amount；
The amount of the material of the carbonaceous reducing agent powder measured with effective carbon is with P2O5The material of the rock phosphate powder of metering
7 times of amount；The amount of the material of the calcareous raw material powder measured with CaO is with P2O5The 7 of the amount of the material of the rock phosphate powder of metering
Times；
C, the first conversion zone of preparation：
The first conversion zone raw material rock phosphate powder, calcareous raw material powder and the carbonaceous reducing agent powder input that step b is equipped with is made
Pelletizing pelletizing is well mixed in ball machine, is sieved after 5 mesh sieves, oversize is obtained first conversion zone；The pelletizing
Machine is existing any kind of pelletizer, with disc balling machine as optimal selection；Screening machine used by the screening is existing any
The screening machine of type；
Carbonaceous reducing agent powder in first conversion zone reacts the carbon monoxide for producing as recombination reaction layer with rock phosphate powder
The reducing agent of the Phosphate ore reduction reaction conducted in the second conversion zone of pelletizing outside；
D, the second conversion zone raw material of outfit：
Second conversion zone raw material is made up of rock phosphate powder and calcareous raw material powder, wherein：
The consumption of the rock phosphate powder is with P in rock phosphate powder2O5Material amount (i.e. mole) metering, the calcareous original
The consumption of feed powder is with the gauge amount of the material of CaO in calcareous raw material powder；
The amount of the material of the calcareous raw material powder measured with CaO is with P2O5The 7 of the amount of the material of the rock phosphate powder of metering
Times；
E, preparation have the recombination reaction layer pelletizing green-ball of outside second conversion zone：
The first conversion zone and the second conversion zone raw material are taken, with P in the second conversion zone raw material2O5The thing of the rock phosphate powder of metering
The amount of matter is with P in the first conversion zone2O51 times of the amount of the material of the rock phosphate powder of metering；
Pelletizing pelletizing will be well mixed in first conversion zone and the second conversion zone raw material input pelletizer, that is, being obtained has outside
The recombination reaction layer pelletizing green-ball of the second conversion zone；
The green-ball of f, dry composite conversion zone pelletizing：The obtained recombination reaction layer pelletizing for having outside second conversion zone is given birth to
Ball is sent into drying equipment, and at a temperature of 105 DEG C 6h is dried, and obtains recombination reaction layer pelletizing；The drying equipment is existing
The drying equipment of what type；
G, recombination reaction layer pelletizing enter kiln calcining：Recombination reaction layer pelletizing is sent into kiln, with the programming rate of 5 DEG C/min
For, it is warming up to 1300 DEG C, and in 1300 DEG C of insulation calcinings (reduction phosphorus ore, time be) 3h, the kiln gas produced in calcining is used to make
Standby phosphoric acid；After the warm calcining of recombination reaction layer pelletizing, then Jing natural coolings, that is, obtain aglite；
The aglite for obtaining have porous, lightweight, surface strength it is high, without hollow-core construction the characteristics of, and the aglite
Unit weight and intensity meet standard GB/T/T17431.1-2010《Light-weight aggregate and experimental technique》；Can be used to build as aggregate
Lightweight concrete is prepared in Material Field.
As a result such as following table：
Embodiment 11：
A kind of method that efficient utilization carbonaceous reducing agent kiln method reduces phosphorus ore phosphoric acid coproduction aglite, including following step
Suddenly：
A, pretreatment of raw material：Grinding machine grinding is put into after rock phosphate in powder is crushed, granularity is made for D50≤ 25 μm of rock phosphate powder；
Calcareous raw material is put into grinding machine grinding, granularity is made for D50≤ 60 μm of calcareous raw material powder；Carbonaceous reducing agent is put into grinding machine powder
Mill, makes granularity for D50≤ 60 μm of carbonaceous reducing agent powder；
The calcareous raw material is agstone or quick lime；
B, the first conversion zone raw material of outfit：
First conversion zone raw material is made up of rock phosphate powder, calcareous raw material powder and carbonaceous reducing agent powder, wherein：
The carbonaceous reducing agent powder consumption is with effective carbon (C) metering, the consumption of the rock phosphate powder in carbonaceous reducing agent powder
With P in rock phosphate powder2O5Material amount (i.e. mole) metering, the consumption of the siliceous raw material powder is with siliceous raw material powder
SiO2Material gauge amount, the consumption of the calcareous raw material powder is with the gauge amount of the material of CaO in calcareous raw material powder；
The amount of the material of the carbonaceous reducing agent powder measured with effective carbon is with P2O5The material of the rock phosphate powder of metering
7 times of amount；The amount of the material of the calcareous raw material powder measured with CaO is with P2O5The amount of the material of the rock phosphate powder of metering
3.5 times；
C, the first conversion zone of preparation：
The first conversion zone raw material rock phosphate powder, calcareous raw material powder and the carbonaceous reducing agent powder input that step b is equipped with is made
Pelletizing pelletizing is well mixed in ball machine, is sieved after 3 mesh sieves, oversize is obtained first conversion zone；
The pelletizer is existing any kind of pelletizer, with disc balling machine as optimal selection；Used by the screening
Screening machine is existing any kind of screening machine；
Carbonaceous reducing agent powder in first conversion zone reacts the carbon monoxide for producing as recombination reaction layer with rock phosphate powder
The reducing agent of the Phosphate ore reduction reaction conducted in the second conversion zone of pelletizing outside；
D, the second conversion zone raw material of outfit：
Second conversion zone raw material is made up of rock phosphate powder and calcareous raw material powder, wherein：
The consumption of the rock phosphate powder is with P in rock phosphate powder2O5Material amount (i.e. mole) metering, the calcareous original
The consumption of feed powder is with the gauge amount of the material of CaO in calcareous raw material powder；
The amount of the material of the calcareous raw material powder measured with CaO is with P2O5The amount of the material of the rock phosphate powder of metering
3.5 times；
E, preparation have the recombination reaction layer pelletizing green-ball of outside second conversion zone：
The first conversion zone and the second conversion zone raw material are taken, with P in the second conversion zone raw material2O5The thing of the rock phosphate powder of metering
The amount of matter is with P in the first conversion zone2O51 times of the amount of the material of the rock phosphate powder of metering；
Pelletizing pelletizing will be well mixed in first conversion zone and the second conversion zone raw material input pelletizer, that is, being obtained has outside
The recombination reaction layer pelletizing green-ball of the second conversion zone；
The green-ball of f, dry composite conversion zone pelletizing：The obtained recombination reaction layer pelletizing for having outside second conversion zone is given birth to
Ball is sent into drying equipment, and at a temperature of 105 DEG C 6h is dried, and obtains recombination reaction layer pelletizing；The drying equipment is existing
The drying equipment of what type；
G, recombination reaction layer pelletizing enter kiln calcining：Recombination reaction layer pelletizing is sent into kiln, with the programming rate of 5 DEG C/min
For, 1250 DEG C are warming up to, and it is arbitrary in 1250 DEG C of insulation calcining 4h, and the kiln gas produced in calcining is used to prepare phosphoric acid；It is compound
After the warm calcining of conversion zone pelletizing, then Jing natural coolings, that is, obtain aglite；
As a result such as following table：
Embodiment 12：
A kind of method that efficient utilization carbonaceous reducing agent kiln method reduces phosphorus ore phosphoric acid coproduction aglite, including following step
Suddenly：
A, pretreatment of raw material：Grinding machine grinding is put into after rock phosphate in powder is crushed, granularity is made for D50≤ 25 μm of rock phosphate powder；
Siliceous raw material is put into grinding machine grinding, granularity is made for D50≤ 60 μm of siliceous raw material powder；Carbonaceous reducing agent is put into grinding machine powder
Mill, makes granularity for D50≤ 60 μm of carbonaceous reducing agent powder；
The siliceous raw material is silica flour；
B, the first conversion zone raw material of outfit：
First conversion zone raw material is made up of rock phosphate powder, siliceous raw material powder and carbonaceous reducing agent powder, wherein：
The carbonaceous reducing agent powder consumption is with effective carbon (C) metering, the consumption of the rock phosphate powder in carbonaceous reducing agent powder
With P in rock phosphate powder2O5Material amount (i.e. mole) metering, the consumption of the siliceous raw material powder is with siliceous raw material powder
SiO2Material gauge amount；
The amount of the material of the carbonaceous reducing agent powder measured with effective carbon is with P2O5The material of the rock phosphate powder of metering
7 times of amount；It is described with SiO2The amount of the material of the siliceous raw material powder of metering is with P2O5The amount of the material of the rock phosphate powder of metering
2.35 times；
C, the first conversion zone of preparation：
The first conversion zone raw material rock phosphate powder, siliceous raw material powder and the carbonaceous reducing agent powder input pelletizing that step b is equipped with
Machine is well mixed, and is sieved after 5 mesh sieves, and oversize is obtained first conversion zone；
D, the second conversion zone raw material of outfit：
Second conversion zone raw material is made up of rock phosphate powder, siliceous raw material powder and pore forming material powder, wherein：
The consumption of the rock phosphate powder is with P in rock phosphate powder2O5Material amount (i.e. mole) metering, the siliceous original
The consumption of feed powder is with SiO in siliceous raw material powder2Material gauge amount；
It is described with SiO2The amount of the material of the siliceous raw material powder of metering is with P2O5The amount of the material of the rock phosphate powder of metering
2.35 times；
The consumption of the pore forming material powder is the 5% of rock phosphate powder and siliceous raw material powder gross mass；
The pore forming material is natural plant fibre, plant amylum, coal dust, coke blacking, organic fiber and any high temperature
Under the mixture of any one or more in combustible (graininess and threadiness) material；
E, preparation have the recombination reaction layer pelletizing green-ball of outside second conversion zone：
The first conversion zone and the second conversion zone raw material are taken, with P in the second conversion zone raw material2O5The thing of the rock phosphate powder of metering
The amount of matter is with P in the first conversion zone2O51 times of the amount of the material of the rock phosphate powder of metering；
Pelletizing pelletizing will be well mixed in first conversion zone and the second conversion zone raw material input pelletizer, that is, being obtained has outside
The recombination reaction layer pelletizing green-ball of the second conversion zone；
The green-ball of f, dry composite conversion zone pelletizing：The obtained recombination reaction layer pelletizing for having outside second conversion zone is given birth to
Ball sends into drying equipment, and at a temperature of 105 DEG C 6h is dried, and obtains recombination reaction layer pelletizing；
G, recombination reaction layer pelletizing enter kiln calcining：Recombination reaction layer pelletizing is sent into kiln, with the programming rate of 5 DEG C/min
For, 1250 DEG C are warming up to, and in 1250 DEG C of insulation calcining 4h4, the kiln gas produced in calcining is used to prepare phosphoric acid；Recombination reaction layer
After the warm calcining of pelletizing, then Jing natural coolings, that is, obtain aglite；
As a result such as following table：
Embodiment 13：
A kind of method that efficient utilization carbonaceous reducing agent kiln method reduces phosphorus ore phosphoric acid coproduction aglite, including following step
Suddenly：
A, pretreatment of raw material：Grinding machine grinding is put into after rock phosphate in powder is crushed, granularity is made for D50≤ 25 μm of rock phosphate powder；
Calcareous raw material is put into respectively grinding machine grinding, granularity is made for D50≤ 60 μm of siliceous raw material powder or calcareous raw material powder；By carbonaceous
Reducing agent puts into grinding machine grinding, makes granularity for D50≤ 60 μm of carbonaceous reducing agent powder；Pore forming material is crushed, making granularity is
D50≤ 80 μm of pore forming material powder；
The calcareous raw material is agstone or quick lime；
B, the first conversion zone raw material of outfit：
First conversion zone raw material is made up of rock phosphate powder, calcareous raw material powder and carbonaceous reducing agent powder, wherein：
The carbonaceous reducing agent powder consumption is with effective carbon (C) metering, the consumption of the rock phosphate powder in carbonaceous reducing agent powder
With P in rock phosphate powder2O5Material amount (i.e. mole) metering, the consumption of the calcareous raw material powder is with CaO in calcareous raw material powder
Material gauge amount；
The amount of the material of the carbonaceous reducing agent powder measured with effective carbon is with P2O5The material of the rock phosphate powder of metering
7 times of amount；The amount of the material of the calcareous raw material powder measured with CaO is with P2O5The amount of the material of the rock phosphate powder of metering
3.5 times；
C, the first conversion zone of preparation：
The first conversion zone raw material rock phosphate powder, calcareous raw material powder and the carbonaceous reducing agent powder input pelletizing that step b is equipped with
Mix in machine, sieved after 5 mesh sieves, oversize is obtained first conversion zone；
D, the second conversion zone raw material of outfit：
Second conversion zone raw material is made up of rock phosphate powder, calcareous raw material powder and pore forming material powder, wherein：
The consumption of the rock phosphate powder is with P in rock phosphate powder2O5Material amount (i.e. mole) metering, the siliceous original
The consumption of feed powder is with SiO in siliceous raw material powder2Material gauge amount, the consumption of the calcareous raw material powder is with calcareous raw material powder
The gauge amount of the material of CaO；
The amount of the material of the calcareous raw material powder measured with CaO is with P2O5The amount of the material of the rock phosphate powder of metering
3.5 times；The consumption of the pore forming material powder is the 6% of rock phosphate powder and siliceous raw material powder or calcareous raw material powder gross mass；
The pore forming material is natural plant fibre, plant amylum, coal dust, coke blacking, organic fiber and any high temperature
Under the mixture of any one or more in combustible (graininess and threadiness) material；
E, preparation have the recombination reaction layer pelletizing green-ball of outside second conversion zone：
The first conversion zone and the second conversion zone raw material are taken, with P in the second conversion zone raw material2O5The thing of the rock phosphate powder of metering
The amount of matter is with P in the first conversion zone2O51 times of the amount of the material of the rock phosphate powder of metering；
Pelletizing pelletizing will be well mixed in first conversion zone and the second conversion zone raw material input pelletizer, that is, being obtained has outside
The recombination reaction layer pelletizing green-ball of the second conversion zone；
The green-ball of f, dry composite conversion zone pelletizing：The obtained recombination reaction layer pelletizing for having outside second conversion zone is given birth to
Ball is sent into drying equipment, and any time in 6h～12h is dried at arbitrary temperature in 105 DEG C, obtains recombination reaction layer pelletizing；
G, recombination reaction layer pelletizing enter kiln calcining：Recombination reaction layer pelletizing is sent into kiln, with the programming rate of 5 DEG C/min
It is warming up to 1300 DEG C, and arbitrary, the kiln gas produced in calcining in 1300 DEG C of insulation calcinings (reduction phosphorus ore, time be) 3～5h
For preparing phosphoric acid；After the warm calcining of recombination reaction layer pelletizing, then Jing natural coolings, that is, obtain aglite；
The aglite for obtaining have porous, lightweight, surface strength it is high, without hollow-core construction the characteristics of, and the aglite
Unit weight and intensity meet standard GB/T/T17431.1-2010《Light-weight aggregate and experimental technique》；Can be used to build as aggregate
Lightweight concrete is prepared in Material Field.
Experimental result such as following table：
Embodiment 14：
A kind of method that efficient utilization carbonaceous reducing agent kiln method reduces phosphorus ore phosphoric acid coproduction aglite, also including following
Step：To prevent the phosphorus after reducing from returning suction, need to ensure in barotropic state in kiln, to adopting forced ventilation in kiln described in step g
Or the means such as natural air exhaust；Wherein, forced ventilation to be referred to and order about gas flowing in kiln using plant equipment such as blower fans；Natural air exhaust
Refer to that the draft produced using chimney makes gas flowing in kiln.It is arbitrary in the other the same as in Example 1～13, omit.
Embodiment 15：
The method that efficient utilization carbonaceous reducing agent kiln method reduces phosphorus ore phosphoric acid coproduction aglite, also comprises the following steps
(kiln gas produced in calcining described in step g is used to prepare the concrete grammar step of phosphoric acid)：
Kiln gas relieving haperacidity：Pelletizing is entered the kiln gas produced in kiln calcining (reduction phosphorus ore) hydration chamber is sent into after purified treatment
And aquation absorbs preparing phosphoric acid in absorption tower；Concrete grammar is；Pelletizing enter kiln calcining (reduction phosphorus ore) kiln gas that obtains mainly into
It is divided into P2O5、CO2, kiln gas is removed into CO through purified treatment2Pure phosphoric anhydride (P is obtained afterwards2O5) gas；Pure phosphoric anhydride
Gas in hydration chamber with spray under phosphoric acid,diluted (mass percent concentration be 50%～70%H3PO4The aqueous solution) meet into water-filling
Change reaction and generate phosphoric acid；The acid mist produced in hydration process is entered in absorption tower and generates phosphorus with the phosphoric acid,diluted reaction under tower top spray
Acid；Aquation is absorbed and obtain finished product phosphoric acid after the phosphoric acid feeding storage acid tank cooling for obtaining；The concrete grammar is compared with technology.Its
It is omitted with arbitrary in embodiment 1～14.
In above-described embodiment：Carbonaceous reducing agent described in step a can be coke or coal or other carbonaceous materials (including life
Material).
In above-described embodiment：The rock phosphate in powder can be the rock phosphate in powder of any grade in high, medium and low grade phosphorus mine.
In above-described embodiment：The each raw material for being adopted is commercially available prod.
In above-described embodiment：Technological parameter (temperature, time, speed etc.) and each component numerical quantity in each step etc. are
Scope, any point is applicable.
The technology contents being not specifically delineated in present invention and above-described embodiment are compared with technology.
The invention is not restricted to above-described embodiment, can implement and with the good result described in present invention.
Claims (6)
1. the method that efficient utilization carbonaceous reducing agent kiln method reduces phosphorus ore phosphoric acid coproduction aglite, is characterized in that including following
Step：
A, pretreatment of raw material：Grinding machine grinding is put into after rock phosphate in powder is crushed, granularity is made for D50≤ 25 μm of rock phosphate powder；By silicon
Matter raw material or calcareous raw material put into respectively grinding machine grinding, make granularity for D50≤ 60 μm of siliceous raw material powder or calcareous raw material powder；
Carbonaceous reducing agent is put into grinding machine grinding, granularity is made for D50≤ 60 μm of carbonaceous reducing agent powder；Pore forming material is crushed, is made
Granularity is D50≤ 80 μm of pore forming material powder；
The siliceous raw material is silica；
The calcareous raw material is agstone or quick lime；
B, the first conversion zone raw material of outfit：
First conversion zone raw material is made up of rock phosphate powder, siliceous raw material powder or calcareous raw material powder and carbonaceous reducing agent powder, its
In：
, with effective carbon metering in carbonaceous reducing agent powder, the consumption of the rock phosphate powder is with rock phosphate in powder for the carbonaceous reducing agent powder consumption
P in powder2O5Material gauge amount, the consumption of the siliceous raw material powder is with SiO in siliceous raw material powder2Material gauge amount, institute
The consumption of calcareous raw material powder is stated with the gauge amount of the material of CaO in calcareous raw material powder；
The amount of the material of the carbonaceous reducing agent powder measured with effective carbon is with P2O5The amount of the material of the rock phosphate powder of metering
6～9 times；
It is described with SiO2The amount of the material of the siliceous raw material powder of metering is with P2O5The 0 of the amount of the material of the rock phosphate powder of metering～
10.5 times, the amount of the material of the calcareous raw material powder measured with CaO is with P2O5The 0 of the amount of the material of the rock phosphate powder of metering
～10.5 times；
C, the first conversion zone of preparation：
The first conversion zone raw material rock phosphate powder, siliceous raw material powder or calcareous raw material powder and the carbonaceous reducing agent that step b is equipped with
Pelletizing is well mixed in powder input pelletizer, is sieved after 2～6 mesh sieves, oversize is obtained first conversion zone；
D, the second conversion zone raw material of outfit：
Second conversion zone raw material is made up of rock phosphate powder, siliceous raw material powder or calcareous raw material powder and pore forming material powder, wherein：
The consumption of the rock phosphate powder is with P in rock phosphate powder2O5Material gauge amount, the consumption of the siliceous raw material powder is with silicon
SiO in matter raw material powder2Material gauge amount, the consumption of the calcareous raw material powder is with the amount of the material of CaO in calcareous raw material powder
Metering；
It is described with SiO2The amount of the material of the siliceous raw material powder of metering is with P2O5The 0.3 of the amount of the material of the rock phosphate powder of metering
～10.5 times, the amount of the material of the calcareous raw material powder measured with CaO is with P2O5The amount of the material of the rock phosphate powder of metering
0.3～10.5 times；
The consumption of the pore forming material powder is the 0～15% of rock phosphate powder and siliceous raw material powder or calcareous raw material powder gross mass；
The pore forming material is any one or two kinds of in natural plant fibre, plant amylum, coal dust, coke blacking, organic fiber
Mixture above；
E, preparation have the recombination reaction layer pelletizing green-ball of outside second conversion zone：
The first conversion zone and the second conversion zone raw material are taken, with P in the second conversion zone raw material2O5The material of the rock phosphate powder of metering
Amount is with P in the first conversion zone2O50.5～1 times of the amount of the material of the rock phosphate powder of metering；
Pelletizing will be well mixed in first conversion zone and the second conversion zone raw material input pelletizer, that is, being obtained has outside second to react
The recombination reaction layer pelletizing green-ball of layer；
The green-ball of f, dry composite conversion zone pelletizing：The obtained recombination reaction layer pelletizing green-ball for having outside second conversion zone is sent
In entering drying equipment, 6h～12h is dried at a temperature of 100 DEG C～110 DEG C, obtains recombination reaction layer pelletizing；
G, recombination reaction layer pelletizing enter kiln calcining：Recombination reaction layer pelletizing is sent into kiln, with the liter of 5 DEG C/min～20 DEG C/min
Warm speed is to be warming up to 1200 DEG C～1350 DEG C, and 3～5h of insulation calcining at 1200 DEG C～1350 DEG C, is produced in calcining
Kiln gas is used to prepare phosphoric acid；After the warm calcining of recombination reaction layer pelletizing, then Jing natural coolings, that is, obtain aglite.
2. the method that the efficient utilization carbonaceous reducing agent kiln method as described in claim 1 reduces phosphorus ore phosphoric acid coproduction aglite,
It is characterized in that：With SiO described in step b2The amount of the material of the siliceous raw material powder of metering is with P2O5The material of the rock phosphate powder of metering
0.3～9 times of amount, the amount of the material of the calcareous raw material powder measured with CaO is with P2O5The material of the rock phosphate powder of metering
0.3～9 times of amount.
3. efficient utilization carbonaceous reducing agent kiln method reduces the side of phosphorus ore phosphoric acid coproduction aglite as described in claim 1 or 2
Method, is characterized in that：The consumption of pore forming material powder described in step d is rock phosphate powder and siliceous raw material powder or calcareous raw material powder gross mass
3%～10%.
4. efficient utilization carbonaceous reducing agent kiln method reduces the side of phosphorus ore phosphoric acid coproduction aglite as described in claim 1 or 2
Method, is characterized in that：Carbonaceous reducing agent described in step a is coke or coal.
5. the method that the efficient utilization carbonaceous reducing agent kiln method as described in claim 3 reduces phosphorus ore phosphoric acid coproduction aglite,
It is characterized in that：Carbonaceous reducing agent described in step a is coke or coal.
6. efficient utilization carbonaceous reducing agent kiln method reduces phosphorus ore phosphoric acid coproduction aglite as described in claim 1,2 or 5
Method, is characterized in that also comprising the following steps：To adopting forced ventilation or natural air exhaust in kiln described in step g.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000247616A (en) * | 1999-03-02 | 2000-09-12 | Nkk Corp | Facilities and method for recovering phosphorus from waste |
| CN101020574A (en) * | 2006-09-30 | 2007-08-22 | 湖北三新磷酸有限公司 | Direct phosphate rock reducing process for preparing high concentration phosphoric acid and coproducing silicate and aluminate products |
| CN101033061A (en) * | 2006-09-30 | 2007-09-12 | 湖北三新磷酸有限公司 | Method of producing phosphoric acid by directly reducing phosphorus ore and co-producing Portland cement grog |
| US20130108541A1 (en) * | 2010-07-05 | 2013-05-02 | Xiaolin Yin | Process for directly producing sulfur trioxide and sulfuric acid using gypsum as raw material |
| CN103539091A (en) * | 2013-10-30 | 2014-01-29 | 武汉工程大学 | Method for preparing phosphoric acid by catalytic reduction of low-medium-grade phosphorite |
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2016
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000247616A (en) * | 1999-03-02 | 2000-09-12 | Nkk Corp | Facilities and method for recovering phosphorus from waste |
| CN101020574A (en) * | 2006-09-30 | 2007-08-22 | 湖北三新磷酸有限公司 | Direct phosphate rock reducing process for preparing high concentration phosphoric acid and coproducing silicate and aluminate products |
| CN101033061A (en) * | 2006-09-30 | 2007-09-12 | 湖北三新磷酸有限公司 | Method of producing phosphoric acid by directly reducing phosphorus ore and co-producing Portland cement grog |
| US20130108541A1 (en) * | 2010-07-05 | 2013-05-02 | Xiaolin Yin | Process for directly producing sulfur trioxide and sulfuric acid using gypsum as raw material |
| CN103539091A (en) * | 2013-10-30 | 2014-01-29 | 武汉工程大学 | Method for preparing phosphoric acid by catalytic reduction of low-medium-grade phosphorite |
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