CN108751144A - A kind of technique of ardealite and low product bauxite overfiring-proof coating coproduction acid - Google Patents
A kind of technique of ardealite and low product bauxite overfiring-proof coating coproduction acid Download PDFInfo
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- CN108751144A CN108751144A CN201810712403.7A CN201810712403A CN108751144A CN 108751144 A CN108751144 A CN 108751144A CN 201810712403 A CN201810712403 A CN 201810712403A CN 108751144 A CN108751144 A CN 108751144A
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- 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
- C01B17/76—Preparation by contact processes
- C01B17/78—Preparation by contact processes characterised by the catalyst used
- C01B17/79—Preparation by contact processes characterised by the catalyst used containing vanadium
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/06—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
- C01F7/0693—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process from waste-like raw materials, e.g. fly ash or Bayer calcination dust
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/08—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals with sodium carbonate, e.g. sinter processes
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/14—Aluminium oxide or hydroxide from alkali metal aluminates
- C01F7/141—Aluminium oxide or hydroxide from alkali metal aluminates from aqueous aluminate solutions by neutralisation with an acidic agent
- C01F7/142—Aluminium oxide or hydroxide from alkali metal aluminates from aqueous aluminate solutions by neutralisation with an acidic agent with carbon dioxide
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/44—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water
- C01F7/441—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water by calcination
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00525—Coating or impregnation materials for metallic surfaces
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
Abstract
The present invention provides the techniques of a kind of ardealite and low product bauxite overfiring-proof coating coproduction acid, include the following steps：Raw material are made in ardealite, low product bauxite, additive and modifying agent mixed grinding, is sent into kiln and roasts to obtain clinker；Clinker is dissolved out, and is separated by solid-liquid separation；Isolated solution prepares alumina powder；By alumina powder obtained and segregation aluminum phosphate curing agent, silicon carbide mixing, crushing, mixed raw material of being sieved to obtain, polycarboxylate water-reducer is added into mixed raw material, stirs and evenly mixs, adds silica sol binder and stir and evenly mix to obtain overfiring-proof coating；Isolated residue is obtained into sulfide through flotation；Sulfuric acid is made in sulfide processing.The present invention, which has, prepares overfiring-proof coating and relieving haperacidity is at low cost, and the utilization rate of ardealite and low product bauxite is high, and the overfiring-proof coating prepared using alumina powder can effectively reduce the scaling loss of steel billet during heating, the simple feature of acid-making process.
Description
Technical field
The present invention relates to the techniques of a kind of ardealite and low product bauxite overfiring-proof coating coproduction acid, belong to chemical metallurgy
Field.
Background technology
Steel billet before the rolling, will generally heat or soaking 2-3h in the heating furnace of 1250-1300 DEG C of oxidizing atmosphere,
The even longer time.Therefore, with the oxygen in atmosphere strong oxidation reaction can occur for steel surface, to generate a large amount of oxidation
Scaling loss makes the lumber recovery of steel significantly reduce.Billet oxidization in order to prevent in existing technology, is often used antioxidizing paint first to steel
Base surface is sprayed, and is heated to steel billet, and realizing reduces the scaling loss of steel billet during heating, but in the overfiring-proof
In the production of coating, need a large amount of aluminium oxide as raw material, and the complex manufacturing technology of existing alumina powder, production cost
Height leads to alumina powder price, greatly improves the production cost of overfiring-proof coating.
Ardealite refer in phosphoric acid production with sulfuric acid treating phosphorite when the solid that generates, main component is calcium sulfate
（CaSO4）, content generally can reach 70-90% or so.In addition, ardealite also contains plurality of impurities：Undecomposed phosphorus ore, not
Phosphoric acid, calcirm-fluoride, iron, aluminium compound, acid non-soluble substance, organic matter of washes clean etc..Ardealite about 2000 is discharged every year in China
Ten thousand tons, add up nearly hundred million tons of discharge capacity.Utilization rate of the ardealite in terms of building materials is less than 5%, a large amount of gypsum stack land occupations, sternly
Heavily contaminated environment.
China bauxite is largely diaspore type, accounts for 98% of total resources or more, feature be high silicon, high alumina,
Low iron, ore entirety alumina silica ratio is relatively low, 80% or more be in low product bauxite, alumina silica ratio is less than 4 in low-grade bauxite, aluminium
Silicon is than the ore more than 9 only 18.5% or so, therefore low product bauxite resource in developing, and is to realize that China's aluminum oxide industry can be held
The only way which must be passed of supervention exhibition.
It is existing currently, seldom for the technology of the comprehensive utilization of ardealite and low product bauxite, be substantially focused on building materials and
It the traditional fields such as paves the way, which results in the waste of a large amount of high value ingredients in ardealite and low product bauxite, added value is very low.
And ardealite and low product is alumyte synthesized using come overfiring-proof coating processed, while the technique of coproduction acid, it has not been reported.
Goal of the invention
The object of the present invention is to provide the techniques of a kind of ardealite and low product bauxite overfiring-proof coating coproduction acid.This hair
It is bright have prepare overfiring-proof coating and relieving haperacidity is at low cost, the utilization rate of ardealite and low product bauxite is high, using alumina powder system
Standby overfiring-proof coating can effectively reduce the scaling loss of steel billet during heating, the simple feature of acid-making process.
Technical scheme of the present invention
A kind of technique of ardealite and low product bauxite overfiring-proof coating coproduction acid, includes the following steps：
A, ardealite, low product bauxite, additive and modifying agent are mixed and is ground and raw material are made, be sent into roasting in kiln, be made
Clinker；
B, clinker made from step A is dissolved out, and is separated by solid-liquid separation；
C, CO is added into solution isolated step B2It is no longer generated to white precipitate, it is clear after then filtering out white precipitate
Drying and calcination are washed, alumina powder is crushed to obtain；
D, by alumina powder made from step C and segregation aluminum phosphate curing agent, silicon carbide mixing, crushing, mixed raw material of being sieved to obtain,
Polycarboxylate water-reducer is added into mixed raw material, stirs and evenly mixs, adds silica sol binder and stirs and evenly mixs to obtain overfiring-proof coating
E, by residue isolated step B through flotation, sulfide is detached to obtain；
F, the step E sulfide isolated is placed under the oxygen-enriched environment of 30-50%, 3-5h is roasted at 800-1200 DEG C, roasted
The flue gas of generation is absorbed using the concentrated sulfuric acid after vanadic anhydride catalysis reaction, sulfuric acid is made.
In the technique of ardealite above-mentioned and low product bauxite overfiring-proof coating coproduction acid, in step A, the additive
For sodium carbonate, sodium sulphate or caustic soda；The modifying agent is anthracite, carbon or gangue.
3, the technique of ardealite according to claim 1 and low product bauxite overfiring-proof coating coproduction acid, it is special
Sign is：In step A, in the raw material, ardealite and low product bauxite are according to 1:1.2-2.2 the ratio of weight ratio mixes,
Additive adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, the mixing ratio of modifying agent
Example is the 10-25% of raw material total weight.
In the technique of ardealite above-mentioned and low product bauxite overfiring-proof coating coproduction acid, in step A, the kiln is work
Industry rotary kiln, Industry Tunnel Kiln or industrial shaft kiln.
It is in temperature in step A in the technique of ardealite above-mentioned and low product bauxite overfiring-proof coating coproduction acid
Roasting time 1-2h at 1000-1350 DEG C.
In the technique of ardealite above-mentioned and low product bauxite overfiring-proof coating coproduction acid, in step B, the clinker is first
It is dissolved out after water mill；It is 3-6 that liquid when dissolution, which consolidates volume ratio,:1.
It is molten after clinker elder generation water mill in the technique of ardealite above-mentioned and low product bauxite overfiring-proof coating coproduction acid
Go out；It is 4-6 that liquid when dissolution, which consolidates volume ratio,:1.
In the technique of ardealite above-mentioned and low product bauxite overfiring-proof coating coproduction acid, in step C, calcination is in temperature
Calcination time 3-5h at 800-1200 DEG C of degree.
In the technique of ardealite above-mentioned and low product bauxite overfiring-proof coating coproduction acid, in step D, by weight
Meter, the overfiring-proof coating include 15-20 parts of alumina powder, 16-19 parts of segregation aluminum phosphate curing agent, 20-25 parts of silicon carbide, gather
15-19 parts of 0.5-1 parts of carboxylic acid water reducer and silica sol binder.
In the technique of ardealite above-mentioned and low product bauxite overfiring-proof coating coproduction acid, in step D, the mixing is former
The mesh number of material is 700-900 mesh.
The present invention is by by ardealite and the reaction of low product bauxite, recombination, making utility.The overall reaction of principle
Formula is：
CaSO4（Ardealite）+ Na2O·SiO2·Al2O3（Low product bauxite）→ Na2O·Al2O3 + CaO·SiO2↓ +
[sulphur]
From the reaction equation it is found that with the CaO and SiO in low product bauxite in ardealite2Generate calcium orthosilicate（ CaO·SiO2
↓）Afterwards, soluble fabulous sodium aluminate is obtained（Na2O·Al2O3）.[sulphur] in reaction equation, refer to by raw material doping and
Modifying agent technique, the metal sulfide of generation；After leaching the sodium aluminate in clinker, obtained sediment flotation be can be obtained into gold
Belong to sulfide.
Advantageous effect
1, the present invention and is added after additive and modifying agent by using ardealite and low product bauxite as raw material, in height
The clinker of main silicate-containing, aluminate and sulfide is obtained under the technique of temperature roasting, and the main component of the aluminate is aluminium
Sour sodium, by sodium aluminate it is water-soluble go out after may be recovered, and after solid residue flotation, sulfide is obtained, using sulfide system
Standby sulfuric acid, aluminium oxide is prepared by the sodium aluminate of recycling, aluminium oxide and other raw materials is prepared overfiring-proof coating, due to entire work
Mainly using ardealite and low product bauxite as raw material in skill, add other a small amount of substances, therefore, greatly reduce relieving haperacidity and
The cost input of overfiring-proof coating.The utilization rate for also greatly increasing ardealite and low product bauxite, to alleviate ardealite to ring
The pollution in border and make full use of low product bauxite have important contribution.
2, the present invention by raw material by roasting after, obtained ingredient is clearly demarcated, aluminium mainly with aluminic acid na form exist, profit
The characteristic of water is highly soluble in sodium aluminate, can be simple and quick be isolated and be used to prepare aluminium oxide, by aluminium oxide with it is other
Overfiring-proof coating prepared by raw material can effectively reduce the scaling loss of steel billet during heating, and overfiring-proof coating is at low cost.
3, the present invention obtains after the solid residue flotation in technique sulfide, sulfuric acid, relieving haperacidity is prepared using sulfide
Cost it is low, acid-making process is simple.
Further to prove that the effect of the present invention, inventor have done following experiment.
1, the experiment of overfiring-proof coating
Inventor prepares the steel billet of six pieces of same sizes, and the overfiring-proof coating in five groups of embodiments is distinguished by the way of pneumatic
Wherein five blocks of steel billets are sprayed, six blocks of steel billets as a control group, are then placed on heating furnace by the steel billet not sprayed simultaneously
Middle heating 3 hours, the temperature of heating are 1200 DEG C, by the weight difference before and after heating steel billet come in terms of steel billet burn out rate, wherein：Steel billet
Weight × 100% before burn out rate=(quality after weight-heating steel billet before heating steel billet)/heating steel billet, experimental result see the table below
1：
It is analyzed by the burn out rate to 1 six blocks of steel billets of table, overfiring-proof coating of the invention can effectively reduce steel billet heated
Scaling loss in journey.
Specific implementation mode
With reference to embodiment, the present invention is further illustrated, but is not intended as the foundation limited the present invention.
The embodiment of the present invention
Embodiment 1：A kind of technique of ardealite and low product bauxite overfiring-proof coating coproduction acid, steps are as follows：
A, ardealite, low product bauxite, sodium carbonate and anthracite are mixed and is ground and raw material are made, be sent into industrial rotary kiln
Clinker is made in roasting time 1.5h at 1000 DEG C of temperature；Wherein, ardealite and low product bauxite are according to 1:The ratio of 1.2 weight ratios
Example mixing, sodium carbonate adding proportion press contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, anthracite
Mixed proportion be raw material total weight 10%；
B, clinker made from step A is consolidated into volume ratio as 4 with liquid:1 carries out water mill dissolution, and is separated by solid-liquid separation；
C, by residue isolated step B through flotation, sulfide is detached to obtain；
D, the step C sulfide isolated is placed under 30% oxygen-enriched environment, 5h is roasted at 800 DEG C, roast the flue gas of generation
After vanadic anhydride catalysis reaction, is absorbed using the concentrated sulfuric acid, sulfuric acid is made；
E, CO is added into solution isolated step B2It is no longer generated to white precipitate, it is clear after then filtering out white precipitate
Drying is washed, alumina powder is crushed to obtain after calcination time 5h at 800 DEG C of temperature；
F, by alumina powder made from step E and segregation aluminum phosphate curing agent, silicon carbide mixing, crushing, mixed raw material of being sieved to obtain,
Polycarboxylate water-reducer is added into mixed raw material, stirs and evenly mixs, adds silica sol binder and stirs and evenly mixs to obtain overfiring-proof coating；
Wherein by weight, the overfiring-proof coating includes 15 parts of alumina powder, 16 parts of segregation aluminum phosphate curing agent, silicon carbide 20
15 parts of part, 0.5 part of polycarboxylate water-reducer and silica sol binder；The mesh number of the mixed raw material is 700 mesh.
Embodiment 2：A kind of technique of ardealite and low product bauxite overfiring-proof coating coproduction acid, steps are as follows：
A, ardealite, low product bauxite, sodium sulphate and carbon are mixed and is ground and raw material are made, be sent into industrial rotary kiln in temperature
Clinker is made in roasting time 2h at 1200 DEG C；Wherein, ardealite and low product bauxite are according to 1:The ratio of 1.3 weight ratios mixes,
Caustic soda adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1.4 additions, the mixed proportion of carbon are
The 15% of raw material total weight；
B, clinker made from step A is consolidated into volume ratio as 5 with liquid:1 carries out water mill dissolution, and is separated by solid-liquid separation；
C, by residue isolated step B through flotation, sulfide is detached to obtain；
D, the step C sulfide isolated is placed under 35% oxygen-enriched environment, 4h is roasted at 900 DEG C, roast the flue gas of generation
After vanadic anhydride catalysis reaction, is absorbed using the concentrated sulfuric acid, sulfuric acid is made；
E, CO is added into solution isolated step B2It is no longer generated to white precipitate, it is clear after then filtering out white precipitate
Drying is washed, alumina powder is crushed to obtain after calcination time 4h at 1000 DEG C of temperature；
F, by alumina powder made from step E and segregation aluminum phosphate curing agent, silicon carbide mixing, crushing, mixed raw material of being sieved to obtain,
Polycarboxylate water-reducer is added into mixed raw material, stirs and evenly mixs, adds silica sol binder and stirs and evenly mixs to obtain overfiring-proof coating；
Wherein by weight, the overfiring-proof coating includes 16 parts of alumina powder, 17 parts of segregation aluminum phosphate curing agent, silicon carbide 22
16 parts of part, 0.6 part of polycarboxylate water-reducer and silica sol binder；The mesh number of the mixed raw material is 800 mesh.
Embodiment 3：A kind of technique of ardealite and low product bauxite overfiring-proof coating coproduction acid, steps are as follows：
A, ardealite, low product bauxite, caustic soda and gangue are mixed and is ground and raw material are made, be sent into industrial rotary kiln in temperature
Clinker is made in roasting time 1.5h at 1300 DEG C of degree；Wherein, ardealite and low product bauxite are according to 1:The ratio of 1.6 weight ratios
Mixing, sodium carbonate adding proportion press contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, gangue
Mixed proportion is the 20% of raw material total weight；
B, clinker made from step A is consolidated into volume ratio as 6 with liquid:1 carries out water mill dissolution, and is separated by solid-liquid separation；
C, by residue isolated step B through flotation, sulfide is detached to obtain；
D, the step C sulfide isolated is placed under 45% oxygen-enriched environment, 3h is roasted at 1000 DEG C, roast the cigarette of generation
Gas is absorbed using the concentrated sulfuric acid after vanadic anhydride catalysis reaction, sulfuric acid is made；
E, CO is added into solution isolated step B2It is no longer generated to white precipitate, it is clear after then filtering out white precipitate
Drying is washed, alumina powder is crushed to obtain after calcination time 3h at 1100 DEG C of temperature；
F, by alumina powder made from step E and segregation aluminum phosphate curing agent, silicon carbide mixing, crushing, mixed raw material of being sieved to obtain,
Polycarboxylate water-reducer is added into mixed raw material, stirs and evenly mixs, adds silica sol binder and stirs and evenly mixs to obtain overfiring-proof coating；
Wherein by weight, the overfiring-proof coating includes 18 parts of alumina powder, 19 parts of segregation aluminum phosphate curing agent, silicon carbide 24
17 parts of part, 0.8 part of polycarboxylate water-reducer and silica sol binder；The mesh number of the mixed raw material is 900 mesh.
Embodiment 4：A kind of technique of ardealite and low product bauxite overfiring-proof coating coproduction acid, steps are as follows：
A, ardealite, low product bauxite, sodium carbonate and gangue are mixed and is ground and raw material are made, be sent into industrial rotary kiln
Clinker is made in roasting time 1h at 1350 DEG C of temperature；Wherein, ardealite and low product bauxite are according to 1:The ratio of 1.9 weight ratios
Mixing, caustic soda adding proportion press contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, gangue mix
Composition and division in a proportion example is the 25% of raw material total weight；
B, clinker made from step A is consolidated into volume ratio as 5 with liquid:1 carries out water mill dissolution, and is separated by solid-liquid separation；
C, by residue isolated step B through flotation, sulfide is detached to obtain；
D, the step C sulfide isolated is placed under 45% oxygen-enriched environment, 3h is roasted at 1200 DEG C, roast the cigarette of generation
Gas is absorbed using the concentrated sulfuric acid after vanadic anhydride catalysis reaction, sulfuric acid is made；
E, CO is added into solution isolated step B2It is no longer generated to white precipitate, it is clear after then filtering out white precipitate
Drying is washed, alumina powder is crushed to obtain after calcination time 3h at 1200 DEG C of temperature；
F, by alumina powder made from step E and segregation aluminum phosphate curing agent, silicon carbide mixing, crushing, mixed raw material of being sieved to obtain,
Polycarboxylate water-reducer is added into mixed raw material, stirs and evenly mixs, adds silica sol binder and stirs and evenly mixs to obtain overfiring-proof coating；
Wherein by weight, the overfiring-proof coating includes 19 parts of alumina powder, 19 parts of segregation aluminum phosphate curing agent, silicon carbide 24
18 parts of part, 0.9 part of polycarboxylate water-reducer and silica sol binder；The mesh number of the mixed raw material is 800 mesh.
Embodiment 5：A kind of technique of ardealite and low product bauxite overfiring-proof coating coproduction acid, steps are as follows：
A, ardealite, low product bauxite, sodium sulphate and anthracite are mixed and is ground and raw material are made, be sent into industrial rotary kiln
Clinker is made in roasting time 2h at 1200 DEG C of temperature；Wherein, ardealite and low product bauxite are according to 1:The ratio of 2.2 weight ratios
Mixing, caustic soda adding proportion press contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, it is anthracitic mixed
Composition and division in a proportion example is the 20% of raw material total weight；
B, clinker made from step A is consolidated into volume ratio as 4 with liquid:1 carries out water mill dissolution, and is separated by solid-liquid separation；
C, by residue isolated step B through flotation, sulfide is detached to obtain；
D, the step C sulfide isolated is placed under 50% oxygen-enriched environment, 4h is roasted at 1100 DEG C, roast the cigarette of generation
Gas is absorbed using the concentrated sulfuric acid after vanadic anhydride catalysis reaction, sulfuric acid is made；
E, CO is added into solution isolated step B2It is no longer generated to white precipitate, it is clear after then filtering out white precipitate
Drying is washed, alumina powder is crushed to obtain after calcination time 5h at 1200 DEG C of temperature；
F, by alumina powder made from step E and segregation aluminum phosphate curing agent, silicon carbide mixing, crushing, mixed raw material of being sieved to obtain,
Polycarboxylate water-reducer is added into mixed raw material, stirs and evenly mixs, adds silica sol binder and stirs and evenly mixs to obtain overfiring-proof coating；
Wherein by weight, the overfiring-proof coating includes 20 parts of alumina powder, 19 parts of segregation aluminum phosphate curing agent, silicon carbide 25
19 parts of part, 1 part of polycarboxylate water-reducer and silica sol binder；The mesh number of the mixed raw material is 900 mesh.
Claims (10)
1. the technique of a kind of ardealite and low product bauxite overfiring-proof coating coproduction acid, which is characterized in that include the following steps：
A, ardealite, low product bauxite, additive and modifying agent are mixed and is ground and raw material are made, be sent into roasting in kiln, be made
Clinker；
B, clinker made from step A is dissolved out, and is separated by solid-liquid separation；
C, CO is added into solution isolated step B2It is no longer generated to white precipitate, it is clear after then filtering out white precipitate
Drying and calcination are washed, alumina powder is crushed to obtain；
D, by alumina powder made from step C and segregation aluminum phosphate curing agent, silicon carbide mixing, crushing, mixed raw material of being sieved to obtain,
Polycarboxylate water-reducer is added into mixed raw material, stirs and evenly mixs, adds silica sol binder and stirs and evenly mixs to obtain overfiring-proof coating
E, by residue isolated step B through flotation, sulfide is detached to obtain；
F, the step E sulfide isolated is placed under the oxygen-enriched environment of 30-50%, 3-5h is roasted at 800-1200 DEG C, roasted
The flue gas of generation is absorbed using the concentrated sulfuric acid after vanadic anhydride catalysis reaction, sulfuric acid is made.
2. the technique of ardealite according to claim 1 and low product bauxite overfiring-proof coating coproduction acid, feature exist
In：In step A, the additive is sodium carbonate, sodium sulphate or caustic soda；The modifying agent is anthracite, carbon or gangue.
3. the technique of ardealite according to claim 1 and low product bauxite overfiring-proof coating coproduction acid, feature exist
In：In step A, in the raw material, ardealite and low product bauxite are according to 1:The ratio of 1.2-2.2 weight ratios mixes, addition
Agent adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, the mixed proportion of modifying agent are
The 10-25% of raw material total weight.
4. the technique of ardealite according to claim 1 and low product bauxite overfiring-proof coating coproduction acid, feature exist
In：In step A, the kiln is industrial rotary kiln, Industry Tunnel Kiln or industrial shaft kiln.
5. the technique of ardealite according to claim 1 and low product bauxite overfiring-proof coating coproduction acid, feature exist
In：It is the roasting time 1-2h at 1000-1350 DEG C of temperature in step A.
6. the technique of ardealite according to claim 1 and low product bauxite overfiring-proof coating coproduction acid, feature exist
In：In step B, dissolved out after clinker elder generation water mill；It is 3-6 that liquid when dissolution, which consolidates volume ratio,:1.
7. the technique of ardealite according to claim 6 and low product bauxite overfiring-proof coating coproduction acid, feature exist
In：It is dissolved out after clinker elder generation water mill；It is 4-6 that liquid when dissolution, which consolidates volume ratio,:1.
8. the technique of ardealite according to claim 1 and low product bauxite overfiring-proof coating coproduction acid, feature exist
In：In step C, calcination is the calcination time 3-5h at 800-1200 DEG C of temperature.
9. the technique of ardealite according to claim 1 and low product bauxite overfiring-proof coating coproduction acid, feature exist
In：In step D, by weight, the overfiring-proof coating includes 15-20 parts of alumina powder, segregation aluminum phosphate curing agent 16-19
Part, 20-25 parts of silicon carbide, 0.5-1 parts of polycarboxylate water-reducer and 15-19 parts of silica sol binder.
10. the technique of ardealite according to claim 1 and low product bauxite overfiring-proof coating coproduction acid, feature exist
In：In step D, the mesh number of the mixed raw material is 700-900 mesh.
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