CN106365477A - Method for preparing high-strength sulphoaluminate cement and coproducing sulfuric acid - Google Patents

Method for preparing high-strength sulphoaluminate cement and coproducing sulfuric acid Download PDF

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Publication number
CN106365477A
CN106365477A CN201610841813.2A CN201610841813A CN106365477A CN 106365477 A CN106365477 A CN 106365477A CN 201610841813 A CN201610841813 A CN 201610841813A CN 106365477 A CN106365477 A CN 106365477A
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sulphate aluminium
cement
sulfuric acid
aluminium cement
clinker
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CN106365477B (en
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姚华龙
李兴平
朱崇计
胡兆平
刘阳
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KINGENTA NORSTERRA CHEMICAL Co Ltd
Kingenta Ecological Engineering Group Co Ltd
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KINGENTA NORSTERRA CHEMICAL Co Ltd
Kingenta Ecological Engineering Group Co Ltd
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    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/32—Aluminous cements
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00—Sulfur; Compounds thereof
    • C01B17/69—Sulfur trioxide; Sulfuric acid
    • C01B17/74—Preparation
    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/44—Burning; Melting

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention relates to a method for preparing high-strength sulphoaluminate cement and co-producing sulfuric acid. The method comprises the following steps of adopting phosphogypsum for completely replacing limestone and natural gypsum, milling and homogenizing the phosphogypsum, bauxite, steel scoria, silica and pulverized anthracite, and then calcinating the milled and homogenized raw materials at a temperature of 1250-1300 DEG C. The method is capable of greatly improving the phosphogypsum utilization ratio, and high-concentration sulfur dioxide tail gas can be adsorbed to prepare sulfuric acid. The prepared sulphoaluminate cement clinker is high in hardening rate, high in early-stage strength, and stable in later-stage strength increase; performance tests indicate that the mechanical strength of the sulphoaluminate cement prepared by the method conforms to the rapid-hardening sulphoaluminate cement standard.

Description

A kind of method preparing high intensity sulphate aluminium cement co-producing sulfuric acid
Technical field
The present invention relates to a kind of method preparing high intensity sulphate aluminium cement co-producing sulfuric acid, belong to the technology of cement preparation Field.
Background technology
With the modernization of engineering technology, the technical requirements also more and more higher to special cement.Including special engineering All there is special requirement to rapid condensation with the speed of hardening and each phase hardness, such as the connection construction of cement pipeline during construction, Construction of the Foundation Fieldbus field of Large-Scale Equipment etc..Although application and the continuous expansion of selling market, because of the relatively costly of product It is restricted, so that more users is unable to reach.On the other hand, as one of the big production of phosphate fertilizer of three in the world state, it is subject to It is difficult to realize large utilization, huge phosphate fertilizer industry leaves 300,000,000 tons of industry for the restriction of ardealite impurity index and application technology By-product ardealite, about 70,000,000 tons of annual discharge capacity, utilization is about 17,000,000 tons, and utilization rate is less than 30%, it has also become phosphorus The bottleneck of compound fertilizer industry value chain.How to prepare sulphate aluminium cement using by-product ardealite, have become as both at home and abroad One of emphasis of researcher research.
Chinese patent literature cn100351197c discloses a kind of processing technology of quick hardening sulphoaluminate cement, this technique with Raw-meal ingredient is dehydrated phosphogypsum 17-20%, limestone 45-52%, Alumina 31-35%, and this technique successfully utilizes waste material phosphorus Gypsum Fibrosum instead of the natural gypsum in raw-meal ingredient, can partly reduce the cost of sulphate aluminium cement, but phosphorus stone in this technique The usage amount of cream only accounts for the 17-20% of raw-meal ingredient, also needs to the limestone of 45-52% in invention, does not reach effective profit With the purpose of ardealite, in addition in technique, the decomposition of ardealite can discharge sulfur dioxide, improper conduct oneself well to comprehend cause environmental pollution.
Chinese patent literature cn103304170b discloses a kind of method producing sulphate aluminium cement, by limestone, phosphorus Gypsum Fibrosum, low-grade bauxite and coke are configured to cement slurry by a certain percentage, calcine at high temperature, forge after grinding mixes Pass through during burning to promote ardealite decomposition as much as possible, decompose the calcium oxide generating and replace part limestone, sulfur dioxide Gas can be collected and prepare sulphuric acid, and this processing compound is limestone 30-60 part, ardealite 25-55 part, low-grade bauxite 15-45 Part, this invention successfully can also instead of the natural gypsum using waste material ardealite, suitably reduce the cost of cement, but ardealite Do not replace limestone completely, in raw-meal ingredient, still have the limestone of up to 30-60 part, the carbon dioxide that decomposition of limestone generates The concentration of sulfur dioxide can significantly be diluted so that the cost of preparing sulfuric acid by using sulfur dioxide and difficulty increase.
Chinese patent literature cn101481222b discloses a kind of ardealite Partial Conversion sulphate aluminium cement by-product sulfur The method of sour ammonium, key step include ardealite conversion, conversion product filtration separation, the neutralization of conversional solution, ammonium sulfate dense The drying of contracting crystallizing and drying, filter cake and aluminum vanadine, raw meal proportioning and homogenizing, clinker burning and cooling, grog are quenched, grind and all Change, calcine vent gas treatment etc..Produce institute by the ardealite Partial Conversion being not required to pretreatment is met with sulphate aluminium cement Need the compound of dispensing requirements, be not required to again additional limestone, expanded the range of application of ardealite, but this technique needs first by phosphorus stone Cream is converted into Calcium Carbonate and then carries out raw-meal ingredient and calcining again, and equipment needed thereby and technological process are all complex, production cost High.
Through retrieval, have no and utilize ardealite preparation setting rate completely soon, early stage intensity is high and later strength is also promoted surely Determine the report of sulphate aluminium cement.
Content of the invention
For problem present in the preparation of current sulphate aluminium cement, the present invention provides one kind to prepare high intensity aluminium sulfate The method of cement joint production sulphuric acid, the method utilizes ardealite to replace the natural gypsum and limestone completely, and can be by reclaiming tail gas Co-producing sulfuric acid, and process route is simple, low production cost, has good economy and environmental benefit.
Summary of the invention:
The present invention with ardealite, bauxite, slag, Silicon stone, anthracite as raw material, after dispensing, grinding, homogenizing, forge by high temperature Fire ripe material, after grog grinds, directly obtain sulphate aluminium cement, also can add the natural gypsum or limestone preparation inhomogeneity The sulphate aluminium cement of type, also can not the additional natural gypsum, directly obtain sulphate aluminium cement.
Detailed Description Of The Invention:
A kind of method preparing high intensity sulphate aluminium cement co-producing sulfuric acid, comprises the following steps that
A. the preparation of cement slurry:
Carry out dispensing by following mass parts: ardealite is 65-80 part, bauxite 18-28 part, slag 1-2 part, Silicon stone 1-3 Part, anthracite 3-4 part；Each component is mixed, grinding, after homogenizing, obtain cement slurry；
B. the preparation of clinker:
By the prepared cement slurry of step a in 1250～1300 DEG C, calcine 30-40 minute, obtain clinker, calcined The SO 2 tail gas producing in journey send into sulphuric acid preparation system after collecting, and prepare sulphuric acid；
C. the preparation of sulphate aluminium cement:
The clinker regrinding that step b is obtained, obtains final product sulphate aluminium cement.
Currently preferred:
After material grinding in step a, fineness is 120-180 mesh；
Al in described bauxite2o3Mass fraction is 60-75%, further preferred 66%；
Described ardealite is half water ardealite.Described ardealite can also be the natural gypsum, desulfurated plaster and fluorite Cream.
In step a, cement slurry material quality part is as follows: ardealite is 70-75 part, bauxite 18-25 part, slag 2-3 Part, Silicon stone 1-2 part, anthracite 3-4 part.
Currently preferred:
Calcining described in step b is carried out in rotary kiln, shaft kiln or tunnel cave, carries out in further preferred rotary kiln.
Preferably 1280～1300 DEG C of calcining heat in step b, calcination time 35-40 minute.
The clinker that step b obtains can add the natural gypsum as requested, makes different types of sulphate aluminium cement.
The amount of allocating of the natural gypsum calculates as follows:
cg=0.13*m*ac/s
cgThe mass fraction (ratio of the natural gypsum and clinker) that the natural gypsum mixes, if clinker is 1；
acC in clinker4a3The mass fraction of _ s_；
So in the s natural gypsum3Mass fraction；
M natural gypsum coefficient, in different sulphate aluminium cements, natural gypsum dosage is different, and m value is different, m value Scope is between 0-4.
The value of different types of sulphate aluminium cement m is as follows:
As m value: 0-1, early strong, high-strength sulphate aluminium cement is obtained；When m value: 1-2, prepared intumescent sulfur aluminic acid Salt cement；When m value: 2-4, prepared seif-citing rate type sulphate aluminium cement；When m value: 2.5-3.0, prepared low alkalinity type sulfur aluminum Acid salt cement.
Currently preferred:
In step c, clinker is ground to specific surface area is 300～400m2/ kg, further preferred 350m2/kg.Using ball Grinding machine is carried out.
The process of sulphuric acid is prepared in above-mentioned SO 2 tail gas collection, by prior art.
The cement slurry that the present invention is made up of ardealite, bauxite, slag, Silicon stone, anthracite is high after grinding, homogenizing The sulphate aluminium cement obtaining after temperature calcining, performance test shows, the sulphate aluminium cement prepared using the method for the present invention Mechanical strength meets quick hardening sulphoaluminate cement standard, and grog setting rate is fast, and early stage intensity is high and later strength is also promoted surely Fixed, by adjusting cement raw mix proportioning mode, the natural gypsum is substituted completely with ardealite and limestone (is taken by calcium sulfate completely For Calcium Carbonate), the sulphuric acid calcium reduction in ardealite is generated by sulfur dioxide and calcium oxide by anthracite, sulfur dioxide is through oxygen Change absorption and make sulfuric acid product, the calcium oxide of generation, bauxite and unreduced calcium sulfate make aluminium sulfate through high temperature sintering Cement.
Cement slurry in high-temperature burning process, decompose under anthracite effect, and resolution ratio is by most of ardealite 70-85%, wherein slag can provide ferrum oxide, can together form tetra calcium aluminoferrite with calcium oxide and aluminium oxide, reinforcement early stage is strong Degree, Silicon stone carries out appropriateness and supplements silicon dioxide, thus properly increasing the content of dicalcium silicate, reinforcement later strength, reach early stage The high later strength of intensity promotes stable double effectses, and the calcium oxide that the ardealite of participation reaction is decomposed can all replace Calx Stone provides calcium oxide, and decomposing the concentration of SO 2 gas producing is 7-9%, can be used for producing sulphuric acid；Remaining undecomposed phosphorus Gypsum Fibrosum, after high-temperature calcination, is converted into the natural gypsum of outer admixture needed for high temperature Gypsum Fibrosum, alternative grog product.
Main chemical reactions of the present invention are as follows:
The solid slag that heretofore described ardealite produces when referring in phosphoric acid production with sulfuric acid treating phosphorite, different The ardealite that technique obtains is used equally to the present invention.
The method have the advantages that
1. compare the method that other prepare sulphate aluminium cement using ardealite, in the present invention, ardealite can substitute stone completely Lime stone and the natural gypsum carry out clinkersintering, greatly improve the utilization rate of ardealite it is achieved that ardealite recycling, and Effectively reduce the cost of sulphate aluminium cement.
2. add anthracite to promote the decomposition reaction of most of calcium sulfate in ardealite, undecomposed ardealite in raw material The sulphate component that a part is formed as calcium sulphoaluminate in cement clinker mineral, another part can be used to replace outside clinker The natural dihydrate gypsum component mixed, can be directly produced sulphate aluminium cement.
3., due to not using limestone in dispensing, the natural gypsum and limestone are substituted completely (i.e. by sulphuric acid with ardealite Calcium instead of Calcium Carbonate completely), so the concentration of SO 2 gas that decomposing ardealite produces is high, acid making system can be met to two The requirement of sulfur oxide concentration, it is to avoid the pollution problem of sulfur dioxide.
4. the present invention can be according to fe in raw material, and the content of si element is properly added Industrial Solid Waste slag and Silicon stone, thus carrying For iron sesquioxide and silicon dioxide, cement forms appropriate tetra calcium aluminoferrite and dicalcium silicate, thus before reinforcement cement Phase and the mechanical property in later stage.
5. the composite can be widely applied to produce different types of aluminium sulfate water such as hard soon, high-strength, expansion, low alkalinity Mud.
Specific embodiment
In order to be better understood from the essence of the present invention, with reference to embodiment, present disclosure is described further, But limitation of the present invention can not be considered as.
Ardealite in each embodiment is taken from big Nuo Taier Chemical Co., Ltd. of Nintaus two water half water law Wetting phosphorus Half water ardealite of sour by-product, its main component is shown in Table 1, the main component such as table 2 below of slag, and bauxite is the life of Hebei Shijiazhuang Produce, its main component is shown in Table 3, and the main component of Silicon stone is as shown in table 4 below.
Table 1: the main component of ardealite and content
Component cao so3 fe2o3 al2o3 sio2
Content % 36.96 52.63 0.15 0.57 1.97
Table 2: the main component of slag and content
Component cao fe2o3 sio2 al2o3 so3
Content % 47.45 18.75 16.43 5.31 /
Table 3: the main composition of bauxite and content
Component cao fe2o3 sio2 al2o3 so3
Content % 1.03 5.97 15.20 66.00 /
Table 4: the main component of Silicon stone and content
Component cao fe2o3 sio2 al2o3 so3
Content % 7.85 1.24 78.67 0.82 /
Embodiment 1:
Carry out dispensing: 65 parts of ardealite, 28 parts of bauxite, 1 part of slag, 3 parts of Silicon stone, anthracite according to following mass fraction 3 parts；Mixing each component grinding to fineness is 120 mesh again, obtains cement slurry；The cement slurry preparing is placed in rotary kiln Interior calcining 30 minutes at 1250 DEG C, obtain clinker, the tail gas containing sulfur dioxide after calcining send sulphuric acid preparation system to carry out Prepare sulphuric acid；The clinker regrinding burning till is to 350m2After/kg, you can obtain sulphate aluminium cement product, gained sulfur aluminum The mechanical property of acid salt cement is shown in Table 5.
Embodiment 2:
Carry out dispensing: 70 parts of ardealite, 23 parts of bauxite, 2 parts of slag, 2 parts of Silicon stone, anthracite according to following mass fraction 3 parts；Mixing each component grinding to fineness is 150 mesh again, obtains cement slurry；The cement slurry preparing is placed in rotary kiln Interior calcining 30 minutes at 1300 DEG C, obtain clinker, the tail gas containing sulfur dioxide after calcining send sulphuric acid preparation system to carry out Prepare sulphuric acid；The clinker regrinding burning till is to 350m2After/kg, you can obtain sulphate aluminium cement product, gained sulfur aluminum The mechanical property of acid salt cement is shown in Table 5.
Embodiment 3:
Carry out dispensing: 75 parts of ardealite, 19 parts of bauxite, 1 part of slag, 2 parts of Silicon stone, anthracite according to following mass fraction 4 parts；Mixing each component grinding to fineness is 180 mesh again, obtains cement slurry；The cement slurry preparing is placed in rotary kiln Interior calcining 30 minutes at 1300 DEG C, obtain clinker, the tail gas containing sulfur dioxide after calcining send sulphuric acid preparation system to carry out Prepare sulphuric acid, the clinker regrinding burning till to 350m2After/kg, you can obtain sulphate aluminium cement product, gained sulfur aluminum The mechanical property of acid salt cement is shown in Table 5.
Embodiment 4:
Carry out dispensing: 80 parts of ardealite, 18 parts of bauxite, 1 part of slag, 1 part of Silicon stone, anthracite according to following mass fraction 4 parts；Mixing each component grinding to fineness is 180 mesh again, obtains cement slurry；The cement slurry preparing is placed in rotary kiln Interior calcining 30 minutes at 1300 DEG C, obtain clinker, the tail gas containing sulfur dioxide after calcining send sulphuric acid preparation system to carry out Prepare sulphuric acid, the clinker regrinding burning till to 350m2After/kg, you can obtain sulphate aluminium cement product, gained sulfur aluminum The mechanical property of acid salt cement is shown in Table 5.
Embodiment result:
Table 5: sulphate aluminium cement glue sand mechanical property
By sulphate aluminium cement glue sand mechanical property performance, data from table 5 are measured using resistance to compression, anti-folding means of testing Understand, the sulphate aluminium cement that the present invention is obtained reaches 30～42mpa it can be seen that early stage intensity is high, speed of hardening in 1d intensity Degree is fast, and the intensity of 28d reaches 47～58mpa, and later strength is promoted, the mechanics of the sulphate aluminium cement of method of the present invention sintering Performance meets the standard of the sulphate aluminium cement in gb20472-2006.
The above is only the preferred embodiment of the present invention it is noted that above-mentioned embodiment is not construed as to this Bright restriction, protection scope of the present invention should be defined by claim limited range, common for the art For technical staff, without departing from the spirit and scope of the present invention, some improvements and modifications can also be made, also should be regarded as this The protection domain of invention.

Claims (10)

1. a kind of method preparing high intensity sulphate aluminium cement co-producing sulfuric acid, comprises the following steps that
A. the preparation of cement slurry:
Carry out dispensing by following mass parts: ardealite is 65-80 part, bauxite 18-28 part, slag 1-2 part, Silicon stone 1-3 part, no Bituminous coal 3-4 part；Each component is mixed, grinding, after homogenizing, obtain cement slurry；
B. the preparation of clinker:
By the prepared cement slurry of step a in 1250～1300 DEG C, calcine 30-40 minute, obtain clinker, in calcination process The SO 2 tail gas producing send into sulphuric acid preparation system after collecting, and prepare sulphuric acid；
C. the preparation of sulphate aluminium cement:
The clinker regrinding that step b is obtained, obtains final product sulphate aluminium cement.
2. the method for preparation high intensity sulphate aluminium cement co-producing sulfuric acid according to claim 1 is it is characterised in that step After material grinding in a, fineness is 120-180 mesh；
3. the method for preparation high intensity sulphate aluminium cement co-producing sulfuric acid according to claim 1 is it is characterised in that described Bauxite in al2o3Mass fraction is 60-75%, further preferred 66%.
4. the method for preparation high intensity sulphate aluminium cement co-producing sulfuric acid according to claim 1 is it is characterised in that described Ardealite be half water ardealite.
5. the method for preparation high intensity sulphate aluminium cement co-producing sulfuric acid according to claim 1 is it is characterised in that step In a, cement slurry material quality part is as follows: ardealite is 70-75 part, bauxite 18-25 part, slag 2-3 part, Silicon stone 1-2 part, Anthracite 3-4 part.
6. the method for preparation high intensity sulphate aluminium cement co-producing sulfuric acid according to claim 1 is it is characterised in that step Calcining described in b is carried out in rotary kiln, shaft kiln or tunnel cave, carries out in further preferred rotary kiln.
7. the method for preparation high intensity sulphate aluminium cement co-producing sulfuric acid according to claim 1 is it is characterised in that step Preferably 1280～1300 DEG C of calcining heat in b, calcination time 35-40 minute.
8. the method for preparation high intensity sulphate aluminium cement co-producing sulfuric acid according to claim 1 is it is characterised in that step The clinker that b obtains can add the natural gypsum as requested, makes different types of sulphate aluminium cement；
The amount of allocating of the natural gypsum calculates as follows:
cg=0.13*m*ac/s
cgThe mass fraction (ratio of the natural gypsum and clinker) that the natural gypsum mixes, if clinker is 1；
acC in clinker4a3The mass fraction of _ s_；
So in the s natural gypsum3Mass fraction；
M natural gypsum coefficient, in different sulphate aluminium cements, natural gypsum dosage is different, and m value is different, m span Between 0-4.
9. the method for preparation high intensity sulphate aluminium cement co-producing sulfuric acid according to claim 8 is it is characterised in that difference The value of the sulphate aluminium cement m of species is as follows:
As m value: 0-1, early strong, high-strength sulphate aluminium cement is obtained；When m value: 1-2, prepared intumescent aluminium sulfate water Mud；When m value: 2-4, prepared seif-citing rate type sulphate aluminium cement；When m value: 2.5-3.0, prepared low alkalinity type aluminium sulfate Cement.
10. the method for preparation high intensity sulphate aluminium cement co-producing sulfuric acid according to claim 1 is it is characterised in that walk In rapid c, clinker is ground to specific surface area is 300～400m2/ kg, further preferred 350m2/kg.
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CN108485517A (en) * 2018-07-03 2018-09-04 贵州大学 A kind of technique of red mud and ardealite relieving haperacidity coproduction heat resistant powder coating
CN110357461A (en) * 2019-07-31 2019-10-22 吉林亚泰水泥有限公司 It is a kind of using vessel slag as the G of raw material grade oil-well cement clinker and preparation method thereof
WO2020211546A1 (en) * 2019-04-15 2020-10-22 山东大学 Method and system for producing low-alkalinity new-mineral-system sulphoaluminate cement with steel slags
CN112142430A (en) * 2020-09-16 2020-12-29 贵州正和天筑科技有限公司 Phosphogypsum exterior wall plastering mortar and preparation method thereof
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CN112209692A (en) * 2020-09-16 2021-01-12 贵州正和天筑科技有限公司 Phosphogypsum anti-cracking plastering mortar and preparation method thereof
CN116023049A (en) * 2022-12-23 2023-04-28 广西东泥天等水泥有限公司 Preparation method and device of phosphogypsum-doped cement

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108485517A (en) * 2018-07-03 2018-09-04 贵州大学 A kind of technique of red mud and ardealite relieving haperacidity coproduction heat resistant powder coating
WO2020211546A1 (en) * 2019-04-15 2020-10-22 山东大学 Method and system for producing low-alkalinity new-mineral-system sulphoaluminate cement with steel slags
US11396478B2 (en) 2019-04-15 2022-07-26 Shandong University Method and system for producing low-alkalinity sulphoaluminate cement with new mineral system using steel slag
CN110357461A (en) * 2019-07-31 2019-10-22 吉林亚泰水泥有限公司 It is a kind of using vessel slag as the G of raw material grade oil-well cement clinker and preparation method thereof
CN112142430A (en) * 2020-09-16 2020-12-29 贵州正和天筑科技有限公司 Phosphogypsum exterior wall plastering mortar and preparation method thereof
CN112159190A (en) * 2020-09-16 2021-01-01 贵州正和天筑科技有限公司 Special pasting mortar for phosphogypsum and preparation method thereof
CN112209692A (en) * 2020-09-16 2021-01-12 贵州正和天筑科技有限公司 Phosphogypsum anti-cracking plastering mortar and preparation method thereof
CN116023049A (en) * 2022-12-23 2023-04-28 广西东泥天等水泥有限公司 Preparation method and device of phosphogypsum-doped cement

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