CN109809700A - A method of inorfil is produced using Industrial Solid Wastes such as aluminium ashes - Google Patents
A method of inorfil is produced using Industrial Solid Wastes such as aluminium ashes Download PDFInfo
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- CN109809700A CN109809700A CN201910270714.7A CN201910270714A CN109809700A CN 109809700 A CN109809700 A CN 109809700A CN 201910270714 A CN201910270714 A CN 201910270714A CN 109809700 A CN109809700 A CN 109809700A
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Abstract
The present invention provides a kind of method using Industrial Solid Waste production inorfil, the Industrial Solid Waste includes aluminium ash, and selected from one of red mud, flyash, quartz sand and/or its tailing, blast-furnace cinder or a variety of, and optional carbide slag and/or fluorite tailing and/or lime stone and/or lime.Described method includes following steps: A. will carry out being separated by solid-liquid separation after aluminium ash water or acid solution, base extraction or slurries are concentrated；B. it by aluminium lime-ash or aluminium ash dreg slurry and other feed proportionings, mixes, is granulated, granulation material is dry, and particulate material is made；C. by particulate material and one of coke, anthracite, aluminum electrolytic tank scrap anode carbon block or a variety of, reaction and fusing in furnace cupola；D. the melt of furnace cupola outflow, gets rid of silk through high speed centrifugation roller, is cooled into inorfil, and cellucotton product is further made.
Description
Technical field
The invention belongs to resources circulations to recycle and energy-saving and heat-insulating material field, and in particular to a kind of to utilize the industry such as aluminium ash
The method of solid waste production inorfil.
Background technique
With the popularization and application of China's External Thermal Insulation Technology for External, peripheral structure thermal insulation material market shows flourishing hair
Situation, the issuing and implementation of 2015 " architectural fire-protection methods specification " are opened up, organic insulation material is used by limitation, and rock-wool heat insulation plate is met
The huge market opportunity is carried out.Rock-wool heat insulation plate usually by rock wool through adhesive bond, molding, solidification and obtain, its advantage is that not
Combustion performance is good, and wherein the production of rock wool is committed step.
In the prior art, rock wool mainly uses the raw mineral materials such as basalt, diabase, dolomite, is equipped with coke, in smelting furnace
In blast oxygen-enriched air and melted, then through four axis centrifuge high speed centrifugations at fiber；For fusing point and the raising for reducing molten liquid
Melting rate is additionally added the fluxing ingredient such as fluorite sometimes.In the method for producing rock wool as disclosed in CN108821601A, raw material
Mass ratio is basalt 50-60%, dolomite 10-20%, fluorite 5-10%, coke 20-30%.Basalt, doleritic master
Wanting chemical analysis includes SiO2、Al2O3、CaO、MgO、Fe2O3, wherein SiO2+Al2O3+ CaO+MgO content is 77-83% or so,
Fe2O3+ FeO content is in 11% or so, Na2O+K2O is seldom, wherein SiO2Content is most, general 40-50%.Dolomite chemical component
For CaMg (CO3)2, Fe is also contained in some mines2O3.Due to the higher cost of the raw mineral materials, such methods produce rock wool cost
It is also higher.
GB/T25975-2018 external wall external thermal insulation provides in asbestos product, the acidity coefficient of inorfil in rock wool
That is (SiO2+Al2O3)/(CaO+MgO) >=1.6, Na2O+K2O≤5.0%；In GB/T19686-2015 rock wool insulating product for building
It provides, acidity coefficient >=1.6 of inorfil in rock wool；GB/T11835-2016 insulation is in rock wool, mineral wool and its product
It provides, acidity coefficient >=1.6 of inorfil in rock wool, the acidity coefficient 1.1-1.5 of inorfil in mineral wool；The ingredient
It is calculated in mass percent.In general, SiO in the chemical component of rock wool2+Al2O3The total amount of+CaO+MgO is 86-92%, Fe2O3Contain
Measure 5-12%.Wherein, acidity coefficient is characterization mineral aggregate molten mass high-temperature viscosity, fibre-forming performance, fusibility and water resistance
Important comprehensive parameter；Fe2O3Content it is larger to the viscosity influence of molten mass.
The high temperature slag melt that mineral wool is usually discharged by blast furnace directly gets rid of silk and is formed, and some also matches a small amount of auxiliary material
Silk is got rid of again after adjustment chemical component prepares mineral wool.SiO in mineral wool2+Al2O3The total amount of+CaO+MgO general 95% or more,
Fe2O3The resultant of+FeO is less than 2%, and acidity coefficient is in 1.1-1.5.
Aluminium ash is the important solid waste of aluminum i ndustry, and wherein metallic aluminium, which may be up to 20%, aluminium nitride, may be up to 30%, fluoride salt
5-30%；Hydrolyzable generates hydrogen, ammonia or forms ammonia nitrogen when contained metallic aluminium, aluminium nitride meet water or the moisture absorption, causes stench, measures
Big Shi Youyi fires danger, the leachable fluoride pollution for causing water body and soil of fluoride salt, thus belongs to hazardous waste.The prior art
There has been no applications or method that aluminium ash is used to prepare to inorfil and its cotton products.
Currently, the waste material especially solid waste that generation or history are accumulated in China's industrial production, enormous amount, by these
Valuable a part is appropriate in solid waste utilizes, and turns waste into wealth, develops a circular economy, improves environment, is national policy drum
It encourages and supports, but how to utilize the solid waste, production has the product of the market competitiveness and suitable scale, and there are more skills
Art problem.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of side using the Industrial Solid Wastes such as aluminium ash production inorfil
Method, the Industrial Solid Waste further include in red mud, flyash, quartz sand and/or its tailing, blast-furnace cinder in addition to aluminium ash
One or more, and optional carbide slag and/or fluorite, fluorite tailing and/or lime stone and/or lime.It is described inorganic
The products such as plate, felt, item, pipe sleeve, cylinder, band, rope, the paper of cellucotton can be further made in fiber.
In the proportion scale of the inorfil raw materials for production, ingredient, prepared nothing can be carried out by acidity coefficient 1.2-1.6
Machine fiber further production performance can be equivalent to the product of mineral wool, as met insulation slag as defined in GB/T11835-2016
Cotton and its product；Ingredient can be also carried out by acidity coefficient 1.6-2.3, prepared inorfil further production performance can be better than mine
The product of slag wool, as produced rock wool insulating product for building, especially to meet rock wool for building as defined in GB/T19686-2015 exhausted
Hot article, or production insulation are insulated as defined in GB/T11835-2016 with rock wool and its system with rock wool and its product as met
Product；It is preferred that pressing acidity coefficient 1.6-2.3 and Na2O、K2The sum of O mass fraction≤5.0% carries out ingredient, and prepared inorfil can
Further production external wall external thermal insulation asbestos product especially meets and protects outside external wall as defined in GB/T25975-2018
Temperature asbestos product.Wherein the acidity coefficient is SiO2、Al2O3The ratio of the sum of mass fraction and the sum of CaO, MgO mass fraction
Value.Wherein, SiO2、Al2O3The ratio between mass fraction is preferably 2.0-3.5, is in cellucotton product quality, smelting furnace energy consumption, production effect
Rate and cost control etc. realize the condition of more excellent balance；The ratio between CaO, MgO mass fraction generally require >=1.2, MgO compared with
Cellucotton hydrolysis ability is inadequate when more, and service life is short under moist or wet heat condition；Fe2O3When+FeO mass fraction 5-12%
Raw material choice is big, gets rid of the modest viscosity of molten mass before silk；When F mass fraction 1.5-4.0%, the fusing point of molten mass reduces 50-
100 DEG C, melting rate is fast, and smelting furnace energy consumption reduces, single furnace output improves, and the source of F includes aluminium ash and fluorite tailing.
The method of the production inorfil, it may include following steps:
A. it will carry out being separated by solid-liquid separation after aluminium ash water or acid solution, base extraction or slurries be concentrated, aluminium lime-ash or aluminium ash slurry is made
Liquid；
B. the raw material other than aluminium lime-ash or aluminium ash dreg slurry, with aluminium ash is mixed in required ratio ingredient, is granulated, is granulated
Expect drying, particulate material is made；
C. by the particulate material, and one of coke, anthracite, aluminum electrolytic tank scrap anode carbon block or a variety of, by 1:(0.2-
0.4) mass ratio, in a furnace react and melt, smelting furnace be passed through one of air, oxygen or oxygen-enriched air or it is a variety of into
Row is combustion-supporting；
D. the melt of smelting furnace outflow, gets rid of silk through high speed centrifugation roller, is cooled into inorfil.
The method of the production inorfil, wherein step A is by the purpose of aluminium ash water or acid solution, alkaline solution treatment
It is to remove contained water soluble salt such as sodium chloride, potassium chloride in aluminium ash, keeps metallic aluminium, aluminium nitride total overall reaction anti-close to whole
It answers, releases and contain NH3And/or H2Gas, gained aluminium lime-ash or aluminium ash dreg slurry are in the ingredient of step B, mixing, granulation, drying process
Without NH3And/or H2It releases, avoids peculiar smell or fire problem；Sodium chloride, potassium chloride can guarantee nothing prepared by step D after washing out
The quality of machine fiber.Each ingredient of particulate material made by step B can have or be crushed to enough fineness, higher to obtain
Powder mixing degree and contact area, melt particulate material under step C smelting furnace hot conditions, the rate that melts it is appropriate it is fast,
Uniformly, in melt non-fusant is few for bath composition, thus aluminium lime-ash described in step B, the raw material other than aluminium ash can exist
Before ingredient and/or in blending process, -80 mesh are crushed to by modes such as ball millings, the crushing can be completed before ingredient, can
It is carried out after mixing, is crushed after can also mixing certain several raw material in required ratio and be used further to step B ingredient.Made particulate material
Outer dimension is preferable when being 5-10cm, its external surface area hour, melt rate was slightly slow in a furnace when size is larger, and size is smaller
When then mainly cause in smelting furnace furnace gas circulation unsmooth, bed resistance is big.Bath composition not enough uniformly, contain non-fusant, meeting in melt
Leading to the quality of inorfil prepared by step D reduces, and such as shot content height, fiber falls short of, intensity is not high enough.The prior art
In, technique be by such as Black Warrior sillar of size 80-120mm, the dolomite clinker of 40-60mm, 60-100mm blast-furnace cinder
Block, 60-100mm coke briquette mix even or be layered into smelting furnace, melt rate is compared with slow, yield is lower, the dosage of required coke
Also larger.Step B particulate material should be dried to moisture 5m% or less into smelting furnace, preferably be dried to moisture 3m% hereinafter, more preferably dry
To moisture 1m% hereinafter, holding when moisture content is low because the energy consumption of particulate material into moisture evaporation in the temperature-rise period after smelting furnace is larger
Easily reach higher melt temperature.
The temperature of melt temperature or step D smelting furnace outflow melt in step C smelting furnace, can be controlled in 1350-1800 DEG C,
It is more balanced in terms of prepared inorfil quality and melt expense at middle 1450-1600 DEG C.The melt temperature mainly by
The shadow of the combustibility and size of carbon-containing fuel used, particulate material and carbon-containing fuel proportion, combustion-supporting gas oxygen content and intake air temperature
It rings.In carbon-containing fuel used, coke is mainly characterized by low and with prosperity the inner hole of volatile matter, and burning is very fast, anthracite, electricity
Aluminium slot scrap anode carbon block is solved all substantially without inner hole, ratio of combustion coke is slow, but anthracitic cost of material used in identical calorific value
The usually half of deficiency coke；The calorific value of aluminum electrolytic tank scrap anode carbon block is 10-30% higher than coke, and price is suitable, and phosphorus content >=
95%, impurity is a small amount of sulphur, aluminium, sodium, potassium, magnesium, fluorine, makees furnace fuel of the present invention using aluminum electrolytic tank scrap anode carbon block and provides
A kind of utilization ways.
In step C smelting furnace, the particulate material, with the block-like carbon containing combustion such as coke, anthracite, aluminum electrolytic tank scrap anode carbon block
Material is blended and/or is layered in the ratio, from smelting furnace top or top feed, gradually moved down and heat up, reach a high temperature area such as
It reacts and melts between each ingredient at 1300 DEG C or more in particulate material, fusing flows downward after generating melt accumulation；Air,
Oxygen or oxygen-enriched air from the air inlet pipe that smelting furnace lower outside is set be passed through and furnace in carbon-containing fuel combustion reaction occurs,
Mainly generate CO2, CO, releasing heat makes particulate material reach fusion temperature, and maintains the temperature of smelting furnace lower part and melt be discharged；
Gas stream in the stove with downward solid material, melt adverse current, gradually cools down and from smelting furnace top in a manner of flue gas after caloic exchange upwards
Discharge.The carbon containing meeting after-flame of the fuel such as the coke, anthracite, aluminum electrolytic tank scrap anode carbon block institute, residual ash fuse into melt.From
The melt of smelting furnace outflow, the more uniform ingredient the better, more fewer better containing non-fusant, should be using appropriate height such as 1500-1600 DEG C
High-temperature region temperature.By suitably being preheated air, oxygen-enriched air or oxygen, it is such as preheating to 200-600 DEG C, smelting furnace can be improved
Furnace temperature reduces the consumption of carbon-containing fuel；Oxygen is fed using oxygen-enriched air or in certain several air inlet pipe, in addition to smelting furnace furnace can be improved
Temperature reduces the consumption of carbon-containing fuel, moreover it is possible to largely improve the temperature and quality of melt, improve smelting furnace production capacity and made
The quality of standby inorfil product.
Bottom in smelting furnace described in step C can have and accommodate the flowed down melt of material melting and uncombusted coke i.e. bed coke
Cupola well, 0.2-0.5 times that the volume of melt is preferably that smelting furnace described in step D flows out melt volume per hour is accumulated in cupola well,
So that melt is further melted in cupola well, mixed, non-fusant melting is then exhausted from bath composition more evenly later, smelting furnace is molten
The entrance in duct is discharged in body, may be disposed at the middle and lower part in melt depth direction in the cupola well.Smelting furnace melt outlet, Centrifugal rolling
Between the Melt launder that is arranged, carried out using melt in natural gas-oxygen flame or natural gas-oxygen-enriched air flame convective tank
Purging heating or temperature control, advantage are to guarantee the quality of inorfil, reduce the consumption of carbon-containing fuel or improve smelting furnace production capacity.
In the institute of smelting furnace described in step B smoke discharging, usually containing the CO and other fuel gas or flue dust such as 5-12v%, need to carry out
Secondary burning simultaneously recycles heat after secondary burning, supplying air or oxygen-enriched air when burning, in flue gas the fuel gas such as CO or
Dust concentration can be incorporated natural gas when low, with such as 650 DEG C or more of temperature condition needed for guaranteeing incinerator stable operation；The heat
Amount recycling includes preheating to one of air, oxygen or oxygen-enriched air or a variety of combustion-supporting gas.Combustable organic contained by flue gas
Gas or flue dust burn removal in secondary burning, are easily by subsequent wet, half-dried by hydrogen sulfide content, organic sulfur conversion
The SO that method, dry desulfurization remove2。
For the temperature of air-flow usually at 700 DEG C or more, heat recovery mainly passes through heat exchanger after smelting furnace flue gas burns, and will melt
One of air, oxygen-enriched air, oxygen needed for coke burns in furnace or it is a variety of preheated, be allowed to be warming up to such as 200-600
℃.All or part of after secondary burning air-flow can suitably exchanged heat, be cooled to such as dedusting after 120-200 DEG C, lead to step
Solidification drying equipment described in rapid C, by the adhesive sprayed into the fiber forming process, hydrophober baking and curing, at the beginning of making cellucotton
Step sizing.
Step C, smelting furnace described in D, generallys use the vertical heater being built by refractory material, thermal insulation material, and furnace body can have
Can not have metal shell, wherein smelting furnace air-tightness is preferable when having metal shell, not have easy to maintenance when metal shell；It is excellent
Choosing uses furnace cupola, has the steel shell with water-cooling jacket, refractory material, the setting of thermal insulation material are simpler in steel shell；It is soaring
In the water-cooling jacket of furnace steel shell, can using recirculated water remove heat and control refractory material, thermal insulation material temperature condition and
Service life is also pumped into water such as deionized water in water-cooling jacket the steam of 0.1-0.6MPa such as occurs and radiates, institute's producing steam
It can be used for air, the preliminary preheating of oxygen-enriched air or the slurries heating in the washing of step A aluminium ash or pickling, alkali cleaning treatment process,
The heat dissipation of furnace cupola is utilized to a certain extent.
In the raw materials used in the present invention, aluminium ash is the important solid waste of aluminum i ndustry, in addition to containing metallic aluminium, generally goes back chloride containing
Sodium, potassium chloride, fluoride salt, aluminium oxide, aluminium nitride；Wherein metallic aluminium, which may be up to 20%, aluminium nitride, may be up to 30%, fluoride salt 5-
30%；Contained metallic aluminium, aluminium nitride, content is higher, surface area is larger, property is more active, and metallic aluminium meets water or moisture absorption Shi Keshui
Solution generates hydrogen, measures big Shi Youyi and fires danger, and hydrolyzable generates ammonia or forms ammonia nitrogen when aluminium nitride meets water or the moisture absorption, causes
Stench, the leachable fluoride pollution for causing water body and soil of fluoride salt, institute's sodium chloride-containing, potassium chloride etc. easily dissolve out, and can cause water
Body and soil salinity characters, thus aluminium ash is included into the hazardous waste of National Hazard waste register 2016, environment is collected in existing discharge per ton
1000 yuan of tax of protection, and need to pay and transport the expenses such as stockpiling landfill, maintenance control including the land occupation of stockpiling landfill yard, construction, aluminium ash
With, also to undertake may generation risk of environmental pollution and processing cost.Chinese aluminium alloy down payment category aluminium meter 40,000,000 in 2018
Ton or more, by-product aluminium ash 30kg or so based on metallic aluminium per ton in process, thus 1,200,000 tons of ash of annual by-product aluminium or more；
The produced most of comprehensive utilization of aluminium ash during electrolytic aluminium.Maximum value of the invention is that this danger of aluminium ash is utilized admittedly
Useless, including the use of the salic and villiaumite of aluminium lime-ash, wherein villiaumite finally plays quickening melt in the form of calcirm-fluoride
The effect for forming speed, reducing melt composition temperature, improving the mineralizers, fluxing agent such as melt quality.
Red mud is the maximum solid waste of aluminum i ndustry, and chemical component mainly includes Fe2O3、SiO2、Al2O3, CaO, with matter
Score meter is measured, Fe is generally contained2O310-30%, SiO25-40%, Al2O310-30%, CaO1-30%；The main problem of red mud is its alkali
Property and fluorine dissolve out excessive problem, contain Na2O+K2O1-12%, leachate pH11-13, and having is greatly sustained release alkali, it can be long-term
Lasting dissolution.Chinese 60,000,000 tons of yield of aluminium oxide in 2018 or more, it is one ton of aluminium oxide by-product red mud per ton or more average；Due to
Almost not plus utilize, storage space thousands of mus, mu up to ten thousand easily.
Most of aluminium ash of by-product and most red mud fail to utilize over the years, and burden is very big；Wherein aluminium ash
Burden is more than several ten million tons, and the burden of red mud is more than 500,000,000 tons.
Flyash is using coal dust as the solid waste of the thermal power plant of fuel and concentrated supply of heating in the city boiler, with mass fraction
Meter generally contains SiO210-65%, Al2O310-40%, Fe2O31.5-10%, CaO+MgO2-20%, Na2O+K2O1-6%；Representative value is
SiO240-55%, Al2O320-30%, Fe2O34-10%, CaO+MgO2-8%, Na2O+K2O1-2.5%。
Common sandstone is the raw materials for production of common cement, building materials, based on mass fraction, generally contains SiO260-85%,
Al2O35-20%, Fe2O31.5-5%, CaO+MgO1-3%, Na2O+K2O≤1.5%。
Quartz sand generally contains SiO2≥95%；Quartz sand tailing generally contains SiO2>=90%, the quartz sand tailing of low-purity
SiO2Content also >=70%, Fe2O3Content is very low.Existing country's quartz sand, powder yield are not at 100,000,000 tons or so, not plus the quartz sand that utilizes
For the annual output of tailing also at several ten million tons or more, the quartz sand tailing quantity that tailing dam or spoil area are stored up is bigger.
Blast-furnace cinder generally contains SiO based on mass fraction230-45%, Al2O36-20%, Fe2O31% or so, CaO+MgO7-
30%；Carbide slag main component is calcium hydroxide.
The major impurity of 65% or more Calcium Fluoride Content requirement in fluorite ore product, fluorite and fluorite tailing is all SiO2,
The mine for accelerating raw material sintered molten, promoting melt composition, reduce melt viscosity, improving fluidity of molten can be played in the present invention
Agent, fluxing agent effect, help to obtain chemical composition stability, uniform melt, reduce non-fusant content, produce to smelting furnace is improved
The consumption that can, reduce the carbon-containing fuels such as coke has larger effect.
In step A, aluminium ash can realize sodium chloride, potassium chloride with water under conditions of higher temperature such as 80 DEG C-boiling temperature
It all dissolves out or close to whole dissolutions, metallic aluminium, aluminium nitride generates aluminium hydroxide and contain close to the purpose of total overall reaction
NH3、H2Gas, wherein the sodium chloride dissolved out, potassium chloride can play the role of electrochemical corrosion to metallic aluminium, hydrolysis of aluminium nitride is produced
Alkalinity caused by ammonia can also improve reaction rate, and initial reaction stage can be added a small amount of alkali such as sodium hydroxide, lime, carbide slag help and live
Change, wherein lime, carbide slag can control the dissolution and concentration of F in slurries.The method advantage is gained sodium chloride-containing, Klorvess Liquid
Repeatedly or it can be recycling in the processing of the aluminium ash, solution concentration is substantially free of alkali and other salinities after improving, can be appropriate sharp
With sodium chloride and/or potassium chloride is such as concentrated and separated out, the solution of Isolating chlorinated sodium and/or potassium chloride is recycling in step A aluminium
The washing of ash.When aluminium ash institute sodium chloride-containing, the mass content of potassium chloride it is lower as being lower than 3% when, can also be only with addition of such as accounting for aluminium on a small quantity
The water of the 30-60% of grey quality, by metallic aluminium, aluminium nitride close to total overall reaction under conditions of the 80 DEG C-boiling temperature,
Later without being separated by solid-liquid separation and washing, and institute's sodium chloride-containing, potassium chloride are retained in aluminium lime-ash or aluminium ash dreg slurry, then is used
In the ingredient of step B.
In step A, aluminium ash can also be with lye such as sodium hydroxide solution, sodium carbonate liquor or lime slurry, carbide slag slurry
Under conditions of such as 60 DEG C-boiling temperature, realizes that sodium chloride, potassium chloride all dissolve out, metallic aluminium, aluminium nitride total overall reaction or connect
It is bordering on total overall reaction, while releasing and containing NH3、H2Gas.Sodium chloride-containing, chlorination are produced when wherein using excess sodium hydroxide solution
The solution of potassium, sodium metaaluminate, metallic aluminium, aluminium nitride are converted into sodium metaaluminate in aluminium ash, do not generate hydroxide in gained aluminium lime-ash
Aluminium, gained can produce aluminium hydroxide by adding hydrochloric acid or contacting i.e. carbonizatin method with dioxide containing gas containing sodium aluminate solution,
Sodium carbonate liquor after middle carbonizatin method production aluminium hydroxide separation aluminium hydroxide also can be used in the alkali cleaning of step A aluminium ash；It is used
Some aluminium hydroxide, which is understood, in gained aluminium lime-ash when sodium hydroxide solution is not excessive is generated into aluminium lime-ash；Sodium hydroxide concentration
Sodium metaaluminate is not generated when very few finally, metallic aluminium, aluminium nitride are converted into aluminium hydroxide and enter aluminium lime-ash.Using sodium carbonate liquor
When sodium chloride, potassium chloride can all dissolve out, metallic aluminium, aluminium nitride are mainly that hydrolysis is that aluminium hydroxide enters aluminium lime-ash；Point
Solution or clear liquid from aluminium lime-ash are still containing sodium carbonate lye, and concentration is basically unchanged when not mixing aluminium lime-ash cleaning solution, only molten
Sodium chloride, potassium chloride are entered, still can be recycled in the alkali cleaning of step A aluminium ash, sodium to be chlorinated, potassium chloride concentration reach specified value
It still can be used for the alkali cleaning of step A aluminium ash after lye progress sodium chloride, potassium chloride lock out operation afterwards；It is wherein molten using sodium hydroxide
When liquid, sodium carbonate liquor, a small amount of lime, carbide slag can be added in slurries, control the dissolution and concentration of F in slurries.Using lime
When slurries, carbide slag slurry processing aluminium ash, metallic aluminium, aluminium nitride mainly generate calcium metaaluminate and enter aluminium lime-ash, and slurries institute is hydrogeneous
Aluminium hydroxide is mainly generated when calcium oxide is less enters aluminium lime-ash.The reaction step can be completed in a reaction tank, reactor,
It can also be completed, be added by the reaction of multistep or adverse current in a reaction tank, reactor or in multiple reaction tanks, reactor
Material, reaction, discharging are controlled according to response situation, and filtrate or clear liquid are also repeatedly recycled to increase operation rate or sodium chloride, potassium chloride
Concentration.Higher temperature is used in reaction, can be accelerated reaction rate, can especially be improved the conversion ratio of aluminium nitride.
In step A, aluminium ash can be added to dilute hydrochloric acid or hydrochloric solution, by control temperature condition and reactive mode, such as
The reaction temperature condition of 60 DEG C-boiling temperature dissolves out aluminium ash institute sodium chloride-containing, potassium chloride all, and metallic aluminium, aluminium nitride are whole
Reaction close to total overall reaction, generate sodium chloride-containing, potassium chloride, ammonium chloride, aluminium chloride solution, while releasing H2；The reaction
It a step can be completed in a reaction tank, reactor, it can also be in a reaction tank, reactor or in multiple reaction tanks, reaction
It is completed in device by multistep or adverse current, charging, reaction, discharging are controlled according to response situation.Higher temperature is used in reaction, it can
Accelerate reaction rate, can especially improve the conversion ratio of aluminium nitride.For example in a reaction tank, add hydrochloric acid, it stirs, is gradually added into
The reaction of aluminium ash, slurries are gradually warmed up, and by steam pipe coil or can be passed directly into steam heating when necessary, gold contained by reaction to aluminium ash
Belong to and separates solid slag when aluminium total overall reaction, contained aluminium nitride are close to react completely.
When aluminium ash adds dilute hydrochloric acid or hydrochloric solution to handle, the reaction carried out by multistep, including the reaction of two steps,
If the first step is aluminium ash and/or aluminium containing part metals, the aluminium lime-ash of aluminium nitride or underflow liquid, with hydrochloric acid higher such as >=1mol/L
Acid concentration under the conditions of, by aluminium ash and/or aluminium containing part metals, aluminium nitride aluminium lime-ash contained by metallic aluminium total overall reaction, nitrogen
Change this conversion of aluminium base, slurries are concentrated, settled, filtered, and underflow liquid or solid slag can remove residual solution through washing or directly use
In the mixing of the raw materials such as step B and the levigate flyash, quartz sand tailing, blast-furnace cinder, lime stone, fluorite tailing, it is granulated；
Second step be aluminium ash and the first step separation underflow liquid after dilute slurry or gained clear liquid, filtrate be reacted to such as pH2-3 or pH3.5-
4, wherein sodium chloride-containing, potassium chloride, ammonium chloride, aluminium chloride in solution are reacted to when pH2-3, when being reacted to pH3.5-4 in solution
Sodium chloride-containing, potassium chloride, ammonium chloride, aluminium polychloride, the aluminium nitride surplus in aluminium ash is larger under this condition, and metallic aluminium is also normal
There is residue, separating obtained underflow liquid goes the first step, and the reaction was continued, and gained clear liquid or filtrate are used for other purposes, wherein gained pH3.5-4
Sodium chloride-containing, potassium chloride, ammonium chloride, polymeric aluminum chlorides solution can be used as water purification agent and sell, utilize.Pass through the anti-of two or more
When Ying Chi, reactor carry out countercurrent reaction, reaction tank 1, reaction tank 2 are such as set；Wherein reaction tank 1, slurries pH2- is added in aluminium ash
4, supernatant or filtrate are as sodium chloride-potassium chloride-liquor alumini chloridi or sodium chloride-potassium chloride-polymeric aluminum chlorides solution discharge
Otherwise processed or utilization；Reaction tank 2 is added in hydrochloric acid, and slurries pH≤2, underflow liquid or filter residue from reaction tank 1 are relatively filled with hydrochloric acid
Divide ground reaction, supernatant or filtrate flow into or squeeze into reaction tank 1, and filter residue obtained by slurries filtering is matched with the raw material other than aluminium ash
Material is mixed, is granulated, and filter residue can suitably wash the content of control water soluble salt.The reaction tank can be operated accomplished continuously or intermittently, be thrown
Material, charging, discharging can be carried out accomplished continuously or intermittently.
In the aluminium ash and dilute hydrochloric acid, hydrochloric solution or reaction process, it can make to contain Ca in solution after reacting2+≥
0.01mol/L, such as control are in 0.05-0.1mol/L or higher, in addition to can also be added few using the leachable calcium contained in aluminium ash
It measures calcium carbonate such as agstone and generates calcium chloride, the dissolution of F and concentration are controlled to lower level.Hydrochloric acid used, in addition to
Chlor-alkali devices are synthesized by chlorine, combustion of hydrogen, water absorbs the synthetic hydrochloric acid of preparation, can also use certain by-product hydrochloric acids, abraum salt
Acid, as long as it influences prepared aluminium lime-ash or aluminium ash dreg slurry and such as pH2-3 sodium chloride-containing, potassium chloride, the chlorine without possible
Change ammonium, aluminium chloride clear liquid or filtrate, pH3.5-4 sodium chloride-containing, potassium chloride, ammonium chloride, the clear liquid of aluminium polychloride or filtrate into
The harmful components that one step utilizes, for example fluorine-containing waste hydrochloric acid less containing organic principle, that metal impurities are less, contained HF can be used
It can be reacted in the slurry reaction of step A with the agstone of addition and generate CaF2Into aluminium lime-ash or aluminium ash dreg slurry；May be used also
Using, iron aluminium other than metal impurities less waste hydrochloric acid containing iron, the sodium chloride-containing of gained pH3.5-4, chlorine less containing organic principle
Change potassium, ammonium chloride, polyaluminum ferric chloride solution can be used as water purification agent sale.In the available waste hydrochloric acid, fluorine-containing waste hydrochloric acid
Domestic annual output at 3,000,000 tons or more, waste hydrochloric acid containing iron is mostly derived from pickling iron and steel, and domestic annual output is more.
In step A, after the separation of solid and liquid or in the process, aluminium lime-ash or aluminium ash dreg slurry can further be washed or
Water is changed to wash away water soluble ingredient, washing water reuse, but is limited by washing water or quantity of exchanged water, gained aluminium lime-ash or aluminium lime-ash
Slurries usually also have a small amount of sodium chloride, potassium chloride remaining.
What is generated in step A reaction contains NH3And/or H2Air-flow, smelting furnace smoke secondary incinerator can be led to and burnt
It burns, or is mixed into the flue gas before the secondary burning and is burned again into secondary burning device；What is generated in step A reaction contains NH3Gas, can
It prepares ammonium hydroxide or burns the desulfurization of discharge gas for the smoke secondary.
Get rid of silk described in step D, be cooled into during inorfil, can spray into adhesive, hydrophober, then by collection cotton and
Pendulum cloth cotton, pleating-pressuring, solidification drying, further divide, are cut into fiber cotton plate, felt, item, pipe sleeve, cylinder, band；Or it will
Fiber cotton cord, paper is further made in the inorfil for getting rid of silk, being cooled into；Product includes meeting GB/T25975-2018 rule
Fixed external wall external thermal insulation asbestos product meets rock wool insulating product for building as defined in GB/T19686-2015, meets
Insulation rock wool, mineral wool and its product as defined in GB/T11835-2016.
Method of the present invention using aluminium ash production inorfil, the grey, red mud using the solid waste aluminium of aluminum i ndustry, also using fire
The solid waste flyash of power plant, the blast-furnace cinder of steel plant and quartz sand in mineral products and/or its tailing, fluorite ore and/or its
The low-grade mineral products such as tailing or useless tailing make raw material, and the inorfil and heat-preservation cotton that can be produced at low cost better quality produce
The biggish exterior-wall heat insulation asbestos product of product, the especially market growth is electrolytic aluminium, this grey danger of the produced aluminium of aluminium melting processing
It is useless provide one technically, economically all feasible utilization ways, meet the Ministry of Industry and Information Technology announce 2018 No. 26
" industrial solid wastes comprehensive utilization of resources evaluation management Tentative Measures " and " National Industrial solid waste comprehensive utilization of resources product
Catalogue " selected condition, can enjoy and corresponding encourage to foster and preferential tax policy.
Specific embodiment
The present invention is specifically described by the following examples, but is not construed as limiting the invention.
Embodiment 1
Processing aluminium is grey as follows:
A1. in 5000L sealing reaction tank 1, add tap water 2000L, open stirring, lead to 0.3MPa steam into water from bottom in pond
It is warming up to 85 DEG C, closes steam, lead in nitrogen displacement pool the above air of liquid level to O2Content 1.0v% is hereinafter, gradually put into certain aluminium ash
1) J1800kg(-30 mesh, chemical component are shown in Table, control aluminium ash feed rate and coil pipe cooling water flow maintains slurry temperature 85-
90 DEG C, have containing NH3、H2Air-flow discharge, every 30min detection flow constituents are primary, are discharged substantially without air-flow after reacting 3hr, close disk
Pipe cooling water leads to steam and slurries is warming up to boiling, keeps being discharged to examine in steam after slightly boiled 30min not measuring NH3+H2Content is opened
Slurries are cooled to pump out after 85 DEG C and filter through leaf filter by coil pipe cooling water, 0.6MPa wind are led to after filter solution contained by filter cake is basic
Blowout, then into about 1000L85 DEG C originally water washing, after washing lead to 0.6MPa wind again for water base blowout contained by filter cake, it later will filter
Cake is drawn off, and obtains aluminium lime-ash.Filtrate, eluate flow into another identical 5000L sealing reaction tank 2, about 3300L.
A2. it seals in reaction tank 2, opens stirring, lead to 0.3MPa steam into solution from bottom in pond and be warming up to 85 DEG C, Guan Zheng
Vapour leads in nitrogen displacement pool the above air of liquid level to O2Content 1.0v% hereinafter, gradually put into aluminium ash J, control aluminium ash feed rate
85-90 DEG C of slurry temperature is maintained with coil pipe cooling water flow, 30min puts into aluminium ash J1800kg, coil pipe cooling water is closed, after 20min
Slurries are warming up to boiling, and inspection in steam is discharged after continuation boiling reaction 150min and does not measure NH3+H2, opening quotation pipe cooling water temperature is extremely
80 DEG C, slurries are pumped out to be filtered through leaf filter, and 0.6MPa wind is led to after filter and blows out solution contained by filter cake substantially, then into about 1000L70
DEG C originally water washing leads to 0.6MPa wind for water base blowout contained by filter cake again, later draws off filter cake, obtain aluminium lime-ash after washing.Filter
Liquid stream enters to seal reaction tank 1, and eluate collection is separately stored.
A3. the operation for repeating step A2 substantially handles fresh aluminium ash, aluminium ash per treatment in sealing reaction tank 1,2 by turns
As treatment fluid, coprocessing aluminium is grey by 1800kg, the about 3300L in filtrate for using previous sealing reaction tank to collect every time
N7200kg。
Survey Na in four parts of aluminium lime-ash2O+K2O content all≤0.5m%, metal Al+AlN content all≤0.6m%, water content be all
18m% or so generates a large amount of aluminium hydroxide crystal phases substantially without ammonia odor；It is final to collect filtrate survey NaCl+KCl 400g/L,
Wherein 340 g/L containing KCl dissolves Al≤1g/L, Ca2++Mg2+≤ 0.01mol/L, NH4 +≤ 100ppm, F- 52ppm, without ammonia
Smell can recycle sodium chloride and potassium chloride by condensing crystallizing.
In the reaction process for calculating every batch of aluminium ash J1800kg, NH can be released317Nm3、H2155Nm3。
Embodiment 2
Basic the step of repeating embodiment 1, handles aluminium ash J7200kg, and difference is to be also added into when each 1800kg aluminium ash feeds intake
150kg carbide slag (71m% containing calcium hydroxide rolls over CaO53.7m%) is to improve reaction rate and control F-Dissolution.As a result gained four
The Na of part aluminium lime-ash2O+K2O content all≤0.5m%, metal Al+AlN content all≤0.3m%, water content be all 19m% or so, do not have
There is ammonia odor, generates a large amount of aluminium hydroxides and a small amount of calcium metaaluminate crystal phase；Survey final gained filtrate 410 g/ containing NaCl+KCl
L, wherein 355 g/L containing KCl, dissolves Al≤2g/L, Ca2+0.04mol/L, NH4 +≤ 30ppm, F- 1.3ppm, without ammonia
Taste can recycle sodium chloride and potassium chloride by condensing crystallizing.
Embodiment 3
Processing aluminium is grey as follows:
A1. in 5000L sealing reaction tank 2, add 25m% synthetic hydrochloric acid 3400kg, open stirring, in logical nitrogen displacement pool liquid level with
Upper air is to O2Content 1.0v% has hereinafter, gradually investment aluminium is grey containing H2Air-flow discharge, controls aluminium ash feed rate and coil pipe is cooling
Water flow maintains 80-85 DEG C of slurry temperature, and 30min puts into aluminium ash J2200kg, closes coil pipe cooling water, and 20min rear slurry is warming up to
It boils, inspection in steam is discharged after continuation boiling reaction 90min and does not measure H2, slurries pH2.6, opening quotation pipe cooling water temperature to 80
DEG C, slurries are pumped out to be filtered through leaf filter, and 0.6MPa wind is led to after filter and blows out solution contained by filter cake substantially, then into about 1000L70 DEG C
Originally water washing leads to 0.6MPa wind for water base blowout contained by filter cake again, later draws off filter cake, obtain aluminium lime-ash after washing.Filtrate
Sealing reaction tank 1 is flowed into, eluate collection is separately stored.
A2. the operation for repeating step A1 is primary, and filtrate flows into sealing reaction tank 1, and eluate collection is separately stored.
Survey the Na of aluminium lime-ash obtained by pickling twice2O+K2O content all≤it is 0.2m%, metal Al+AlN content≤0.1m%, aqueous
21m% is measured, without ammonia odor；It surveys reaction tank 1 and collects filtrate 140g/L containing NaCl+KCl, AlCl3165g/L, NH4Cl 18g/L,
Ca2++Mg2+0.1mol/L, F-≤1ppm。
In the reaction process for calculating every batch of aluminium ash J2200kg, H can be released2180Nm3。
Embodiment 4
Processing aluminium is grey as follows:
A1. in 5000L sealing reaction tank 2, filtrate 140g/L containing NaCl+KCl, AlCl collected by embodiment 3 are pumped into3
165g/L, NH4Cl 18g/L, Ca2++Mg2+0.1mol/L, F-The filtrate 3000L of≤1ppm, temperature 70 C lead to nitrogen displacement pool
The interior above air of liquid level is to O2Content 1.0v% is hereinafter, open stirring, and gradually investment aluminium ash J, controls aluminium ash feed rate and coil pipe is cold
But water flow maintains 80-85 DEG C of slurry temperature, and 30min puts into aluminium ash J1800kg, closes coil pipe cooling water, the heating of 30min rear slurry
To boiling, inspection in steam is discharged after continuation boiling reaction 120min and does not measure H2, slurries pH3.9, opening quotation pipe cooling water temperature is extremely
80 DEG C, slurries are pumped out to be filtered through leaf filter, and 0.6MPa wind is led to after filter and blows out solution contained by filter cake substantially, then into about 1000L70
DEG C originally water washing leads to 0.6MPa wind for water base blowout contained by filter cake again, later draws off filter cake, obtain aluminium lime-ash after washing.Filter
Liquid stream enters to seal reaction tank 1, and eluate collection is separately stored.
Survey the Na of gained aluminium lime-ash2O+K2O content≤0.3m%, metal Al+AlN content≤0.2m%, water content 22m%, do not have
There is ammonia odor.
Reaction tank 1 collects filtrate and contains aluminium polychloride, can be used as water purification agent for water body purification especially sewage treatment, surveys
Its basicity 50, Al2O3105g/L, NaCl+KCl 250g/L, NH4Cl 32g/L, Ca2++Mg2+0.12mol/L, F-≤1ppm。
In the reaction process for calculating aluminium ash J1800kg, H can be released2155Nm3。
Embodiment 5
Basic the step of repeating embodiment 3, operates, and difference is in step A1, A2 it is all using 25m% containing HCl, HF2.1m%
Fluorine-containing waste hydrochloric acid, and first investment carbide slag 190kg reaction 30min removes HF, throws aluminium ash J2200kg and boiling reaction again later
90min inspection into discharge steam does not measure H2。
Survey the Na of aluminium lime-ash obtained by pickling twice2O+K2O content all≤it is 0.2m%, metal Al+AlN content≤0.1m%, aqueous
22m% is measured, without ammonia odor；It surveys reaction tank 1 and collects filtrate 140g/L containing NaCl+KCl, AlCl3165g/L, NH4Cl 18g/L,
Ca2++Mg2+0.14mol/L, F-≤ 1ppm, pH2.6.
Embodiment 6
Basic the step of repeating embodiment 4, operates, and difference is to seal in reaction tank 2, is pumped into what filtrate collected by embodiment 5 contained
Filtrate 3000L, and H is not measured throwing aluminium ash J1800kg boiling reaction 120min inspection into discharge steam2Afterwards, and investment is electric
Rock ballast 155kg reacts 30min.
Survey the Na of aluminium lime-ash obtained by pickling twice2O+K2O content all≤it is 0.3m%, metal Al+AlN content≤0.2m%, aqueous
23m% is measured, without ammonia odor.
Reaction tank 1 collects filtrate and contains aluminium polychloride, can be used as water purification agent for water body purification especially sewage treatment, surveys
Its basicity 50, Al2O3105g/L, pH4.0, NaCl+KCl 253g/L, NH4Cl 32g/L, Ca2++Mg2+0.13mol/L, F-≤
1ppm。
Embodiment 7
1) the basic A1-A3 step process aluminium ash M(-60 mesh for repeating embodiment 1, chemical component are shown in Table, coprocessing aluminium ash
M7200kg, each 1800kg aluminium ash are also added into 150kg carbide slag (containing calcium hydroxide 71m%) to improve reaction rate when feeding intake
With control F-Dissolution saves originally water washing after leaf filter filtering and the secondary journey that blows air over draws off filter cake.
Detailed process is as follows:
A1. in 5000L sealing reaction tank 1, add tap water 2200L, open stirring, lead to 0.3MPa steam into water from bottom in pond
85 DEG C are warming up to, leads in nitrogen displacement pool the above air of liquid level to O2Content 1.0v% hereinafter, gradually put into aluminium ash M and carbide slag,
It controls aluminium ash feed rate and coil pipe cooling water flow maintains 85-90 DEG C of slurry temperature, 30min puts into aluminium ash J1800kg and electricity
Rock ballast 300kg finishes aluminium ash and closes cooling water, and 20min rear slurry is warming up to boiling, does not have substantially after continuing boiling reaction 150min
NH3Slurries are warming up to boiling by discharge, logical steam, keep being discharged to examine in steam after slightly boiled 30min not measuring NH3+H2, opening quotation pipe
Slurries are cooled to pump out after 85 DEG C and filter through leaf filter by cooling water, and 0.6MPa wind is led to after filter and blows solution contained by filter cake substantially
Out, filter cake is drawn off later, obtains aluminium lime-ash.Filtrate flows into sealing reaction tank 2 and stores, about 3000L.
A2. it seals in reaction tank 2, opens stirring, lead to 0.3MPa steam into solution from bottom in pond and be warming up to 85 DEG C, Guan Zheng
Vapour leads in nitrogen displacement pool the above air of liquid level to O2Content 1.0v% hereinafter, gradually put into aluminium ash M, control aluminium ash feed rate
85-90 DEG C of slurry temperature is maintained with coil pipe cooling water flow, 30min puts into aluminium ash J1800kg, and it finishes aluminium ash and closes cooling water,
20min rear slurry is warming up to boiling, and inspection in steam is discharged after continuation boiling reaction 150min and does not measure NH3+H2, opening quotation pipe cooling
Water is cooled to 80 DEG C, and slurries are pumped out to be filtered through leaf filter, and 0.6MPa wind is led to after filter and blows out solution contained by filter cake substantially, later will
Filter cake is drawn off, and obtains aluminium lime-ash.
A3. the operation for repeating step A2 substantially handles fresh aluminium ash, aluminium ash per treatment in sealing reaction tank 1,2 by turns
1800kg uses previous sealing reaction tank to collect the about 3000L in filtrate as treatment fluid, coprocessing aluminium ash N7200kg every time.
Survey the Na of gained aluminium lime-ash per treatment2O+K2O content all≤0.2m%, metal Al+AlN content are all≤, contains 0.7m%
Water 34m% or so generates a large amount of aluminium hydroxides and a small amount of calcium metaaluminate crystal phase without ammonia odor；Final gained filtrate is surveyed to contain
NaCl+KCl 32g/L dissolves Al≤2g/L, Ca2+0.02mol/L, NH4 +≤ 30ppm, F- ≤ 1.0ppm can without ammonia odor
Continue on for handling aluminium ash M.
Embodiment 8
Basic the step of repeating embodiment 7, handles aluminium ash M, all puts into carbide slag during every secondary aluminium ash M1800kg feeds intake
550kg。
Survey the Na of gained aluminium lime-ash per treatment2O+K2O content all≤0.2m%, metal Al+AlN content are all≤, contains 0.5m%
Water 28m% or so generates a large amount of calcium metaaluminate crystal phases without ammonia odor；Survey final gained filtrate 33g/ containing NaCl+KCl
L dissolves Al≤2g/L, Ca2+0.1mol/L, NH4 +≤ 20ppm, F- ≤ 1.0ppm can continue on for handling without ammonia odor
Aluminium ash M.
The content situation of aluminium lime-ash main component prepared by embodiment 1-8, as listed in table 2.
Embodiment 9-19, comparative example 1
By aluminium lime-ash prepared by embodiment 1,5,8, and the other raw materials of -80 purposes are crushed to, in the ball mill, have pressed table 3 respectively
Listed proportion carries out ingredient, draws off after mixing, ball milling 5hr after ingredient, is granulated through pair roller type briquetting press, and it is 7- that outer dimension, which is made,
Particulate material is made in 120 DEG C of heated-air dryings of meshbeltfurnace to moisture≤2.0m% in the ellipsoid moulding mixture of 9cm.Each embodiment, comparative example
10-20 tons of particulate materials are prepared, aluminium lime-ash is prepared according to aequum.In each embodiment, comparative example, because MgO contained by raw material compared with
Few, the ratio of CaO, MgO mass content is all higher than 5 in ingredient.
By prepared each embodiment, the particulate material of comparative example, the coke, anthracite, the electricity that are respectively 7-9cm with outer dimension
The blending charging of the carbon-containing fuels such as aluminium slot scrap anode carbon block is solved, reacts and melts in furnace cupola, match oxygenized air combustion supporting；Particle
Material, carbon-containing fuel mass ratio be 100:25,1 ton or so per hour of inlet amount.Furnace cupola mainly passes through the oxygen of oxygen-enriched air
Gas content and intake air temperature control melt rate and furnace temperature situation；Top institute's smoke discharging is with oxygen-enriched air at secondary incinerator
Reason, secondary incinerator exhaust end set the tubular heat exchanger of preheating oxygen-enriched air.The interior bottom that furnace cupola helps under fuel gas inlet sets appearance
The cupola well of material melting of receiving flowed down melt and uncombusted carbon-containing fuel, cupola well set leakage fluid dram, lower leakage fluid dram, wherein upper drain
Mouth has the runner of basic horizontal；Lower leakage fluid dram has interior low outer high oblique runner, and the melt inlet of runner is located in cupola well
The middle and lower part in melt depth direction, melt outlet are 2-3cm lower than upper leakage fluid dram；Flow channel entry point, the outlet height of lower leakage fluid dram are poor
Corresponding cupola well volume is about 250L, in addition to accommodating uncombusted carbon-containing fuel, about can also accommodate high-temperature fusant 120L
0.3 times of melt volume is about flowed out in left and right per hour.Melt flow is set between smelting furnace melt outlet and tumbling machine Centrifugal rolling
Slot carries out purging heating or temperature control using melt in natural gas-oxygen-enriched air flame convective tank.Soaring furnace outer wall has cooling folder
Set is pumped into water in cooling jacket 0.2-0.3MPa steam occurs and radiates, and institute's producing steam is through heat exchanger to entering secondary burning
The oxygen-enriched air of furnace exhaust end tubular heat exchanger is tentatively preheated and in the washing of aluminium ash or pickling, alkali cleaning treatment process
Slurries heating.
The melt of furnace cupola outflow, gets rid of silk through tumbling machine high speed centrifugation roller, is cooled into inorfil；Inorfil is cooling
In the process, penetrating adhesive, hydrophober, then by collection cotton and pendulum cloth cotton, pleating-pressuring, solidification drying, further divide,
It is cut into fiber blanket.
In furnace cupola operation process, 400-450 DEG C of oxygen-enriched air intake air temperature is controlled, melt flows out temperature 1450-1550
DEG C, 700-800 DEG C of secondary incinerator；Melt is mainly discharged by lower leakage fluid dram.What is generated in embodiment 1-8 step A reaction contains
NH3And/or H2Air-flow, after lead to secondary burning device and burned, wherein containing NH3Highly concentrated first cool down through heat exchanger is received
Collect ammonium hydroxide；A part of air-flow dedusting after heat exchange is cooled to 150-180 DEG C after secondary burning exhaust preheating oxygen-enriched air, leads to
The solidification drying equipment, the preliminary sizing for cellucotton.
In furnace cupola fill process, first by each 10 tons of the particulate material of embodiment 9-19, comparative example or so, match coke respectively,
It successively carries out reaction fusing, prepare fiber and cellucotton, then each 10 tons of the particulate material of embodiment 10,11,13 or so are matched respectively
Anthracite, matches aluminum electrolytic tank scrap anode carbon block for each 10 tons of particulate material or so of embodiment 12,14,18 respectively, successively carries out anti-
It should melt, prepare fiber and cellucotton.The result shows that anthracite, aluminum electrolytic tank scrap anode carbon block also can be used as the present invention it is soaring
Furnace fuel can obtain the effect essentially identical with coke, and only burn rate is slightly slow, and when melt amount ratio coke hourly is low
10% or so, fiber, cellucotton product index almost without difference.Fiber prepared by the particulate material of embodiment 9-19, cellucotton
Average fiber length 10-30cm, 3.5-4.5 μm of average fibre diameter, shot content (partial size be greater than 0.25mm) 4-6m%, acid
Spend coefficient, Na2O+K2O content, Fe2O3Content is essentially identical with ingredient；Other indexs such as heat linear shrinkage ratio, combustibility, lead
Hot coefficient, quality hydroscopicity, hydrophobic rate meet GB/T25975-2018 external wall external thermal insulation asbestos product, GB/T19686-
The 2015 rock wool insulating product or GB/T11835-2016 insulation for building requirement of rock wool, mineral wool and its product, each standard
Between the distinguishing index of test method, cellucotton acidity coefficient be higher than 1.6 when tested by rock wool process, pressed when lower than 1.6
Mineral wool method is tested.Fiber prepared by the particulate material of comparative example, cellucotton heating linear shrinkage ratio index do not meet and want
It asks.
In addition, repeatedly attempting for leakage fluid dram under melt to be changed to upper leakage fluid dram discharge melt and make in furnace cupola operation process
Standby fiber and cellucotton, as a result the shot content of mainly prepared fiber and cellucotton is abnormal, and increase rate 30-50% is changeed back
Restore after lower leakage fluid dram normal.
The chemical component situation of the raw materials such as 1 aluminium ash of table, m%
。
The content situation of 2 aluminium lime-ash main component of table, m%, 120 DEG C of butts
。
The raw material mass mixture ratio situation of 3 particulate material of table, wherein in terms of 120 DEG C of butts, remaining is thrown aluminium lime-ash by wet basis metering
Material
。
Claims (10)
1. a kind of method using aluminium ash production inorfil, raw material include aluminium ash, it is selected from red mud, flyash, quartz sand
And/or one of its tailing, blast-furnace cinder or a variety of, and optional carbide slag and/or fluorite, fluorite tailing and/or stone
Lime stone and/or lime.
2. utilizing the method for aluminium ash production inorfil as described in claim 1, which is characterized in that the ingredient of the raw materials for production
In ratio, acidity coefficient is 1.2-1.6 or 1.6-2.3.
3. utilizing the method for aluminium ash production rock wool as described in claim 1, which is characterized in that the proportion scale of the raw materials for production
In, acidity coefficient 1.6-2.3, Na2O、K2The sum of O mass fraction≤5.0%.
4. utilizing the method for aluminium ash production inorfil as described in Claims 2 or 3, which is characterized in that the raw materials for production are matched
In material ratio, SiO2、Al2O3The ratio between mass fraction 2.0-3.5；And/or Fe2O3+ FeO mass fraction 5-12%；And/or F mass point
Number 1.5-4.0%.
5. being included the following steps: as described in claim 1 using the method for aluminium ash production inorfil
A. it will carry out being separated by solid-liquid separation after aluminium ash water or acid solution, base extraction or slurries be concentrated, aluminium lime-ash or aluminium ash slurry is made
Liquid；
B. the raw material other than aluminium lime-ash or aluminium ash dreg slurry, with aluminium ash is mixed in required ratio ingredient, is granulated, is granulated
Expect drying, particulate material is made；
C. by the particulate material, and one of coke, anthracite, aluminum electrolytic tank scrap anode carbon block or a variety of, by 1:(0.2-
0.4) mass ratio, in a furnace react and melt, smelting furnace be passed through one of air, oxygen or oxygen-enriched air or it is a variety of into
Row is combustion-supporting；
D. the melt of smelting furnace outflow, gets rid of silk through high speed centrifugation roller, is cooled into inorfil.
6. utilizing the method for aluminium ash production inorfil as claimed in claim 5, which is characterized in that in step A, aluminium ash is added salt
Acid solution reaction is to pH2-4 and contained water soluble salt, metallic aluminium, aluminium nitride dissolution, then is separated by solid-liquid separation, and optionally into
One step washing removal water soluble ingredient；Or by aluminium ash and sodium hydroxide solution, sodium carbonate liquor or lime slurry, carbide slag slurry
It is reacted under conditions of 60 DEG C-boiling temperature, or adds water to react in 80 DEG C-boiling temperature aluminium ash, contained water soluble salt is molten
Out, it by contained metallic aluminium, hydrolysis of aluminium nitride or dissolution, then is separated by solid-liquid separation, and optional further washing removal is water-soluble
Property ingredient.
7. utilizing the method for aluminium ash production inorfil as claimed in claim 6, which is characterized in that the hydrochloric acid is synthesis salt
Sour, fluorine-containing waste hydrochloric acid or waste hydrochloric acid containing iron.
8. utilizing the method for aluminium ash production inorfil as claimed in claim 5, which is characterized in that by the ash of aluminium described in step B
Raw material other than slag, aluminium ash is crushed to -80 mesh before ingredient and/or in blending process；And/or step B particulate material is dry extremely
Moisture 3m% or less；And/or particulate material outer dimension is 5-10cm；And/or melt temperature or step D smelting furnace in step C smelting furnace
The temperature of melt is flowed out, is controlled at 1450-1600 DEG C；And/or bottom in smelting furnace described in step C, have and accommodates material melting
The cupola well of flowed down melt and uncombusted carbon-containing fuel, the interior volume for accumulating melt of cupola well are that smelting furnace described in step D flows per hour
0.2-0.5 times of melt volume out, and the entrance in optional smelting furnace melt discharge duct, are located at melt depth in the cupola well
The middle and lower part in direction；And/or Melt launder is set between smelting furnace melt outlet, tumbling machine Centrifugal rolling, utilize natural gas-oxygen
Melt carries out purging heating or temperature control in flame or natural gas-oxygen-enriched air flame convective tank；And/or step C smelting furnace is discharged fume
Gas is incorporated air or oxygen-enriched air and optional natural gas, carries out secondary burning and recycles heat after secondary burning；And/or it will
The combustion air for being passed through smelting furnace, oxygen-enriched air, oxygen are preheated to 200-600 DEG C；And/or it will be generated in step A reaction
Containing NH3And/or H2Air-flow, lead to secondary burning device and burned, or be mixed into the flue gas before the secondary burning again into secondary
Incinerator burns；And/or it will be generated in step A reaction containing NH3Gas prepares ammonium hydroxide or burns row for the smoke secondary
The desulfurization of outlet；And/or by all or part of air-flow dedusting after heat exchange is cooled to 120-200 DEG C after secondary burning, draw
Preliminary sizing to solidification drying equipment described in step C, for cellucotton.
9. utilizing the method for aluminium ash production inorfil as claimed in claim 5, which is characterized in that step C, smelting furnace described in D is
Furnace cupola；And/or soaring furnace outer wall has cooling jacket, water is pumped into cooling jacket steam occurs and radiated and optional
Institute's producing steam is used for air, oxygen-enriched air it is preliminary preheating or step A aluminium ash washing or pickling, alkali cleaning treatment process in
Slurries heating.
10. any method using aluminium ash production inorfil as described in claim 5-9, which is characterized in that described in step D
Silk is got rid of, is cooled into during inorfil and sprays into adhesive, hydrophober, then passes through collection cotton and pendulum cloth cotton, pleating-pressuring, solid
Change drying, further divides, is cut into fiber cotton plate, felt, item, pipe sleeve, cylinder, band；Or by the nothing getting rid of silk, being cooled into
Fiber cotton cord, paper is further made in machine fiber.
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| CN111333338A (en) * | 2019-12-24 | 2020-06-26 | 力玄科技(上海)有限公司 | Utilize plasma melting furnace to carry out useless resource utilization production line admittedly, useless dangerously |
| WO2021152141A1 (en) * | 2020-01-30 | 2021-08-05 | Rockwool International A/S | Method for making man-made vitreous fibres |
| CN113441510A (en) * | 2021-07-01 | 2021-09-28 | 格尔木弘钜环保科技有限公司 | Landfill method for treating waste by waste through treating aluminum ash with industrial waste acid |
| CN114013058A (en) * | 2021-09-25 | 2022-02-08 | 清远金谷智联环保产业研究院有限公司 | Method for producing rock wool board by comprehensively utilizing solid wastes |
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| CN115279703A (en) * | 2020-01-30 | 2022-11-01 | 洛科威有限公司 | Method for producing artificial vitreous fiber |
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| CN114013058A (en) * | 2021-09-25 | 2022-02-08 | 清远金谷智联环保产业研究院有限公司 | Method for producing rock wool board by comprehensively utilizing solid wastes |
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| CN115818968B (en) * | 2022-08-30 | 2024-05-07 | 湖南锐异资环科技有限公司 | Recycling utilization method of secondary aluminum ash |
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