CN108546148A - A kind of technique of ardealite and low product bauxite producing porous ceramic film coproduction acid - Google Patents
A kind of technique of ardealite and low product bauxite producing porous ceramic film coproduction acid Download PDFInfo
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
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- C01B17/69—Sulfur trioxide; Sulfuric acid
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- 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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- 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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- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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Abstract
The present invention provides the techniques of a kind of ardealite and low product bauxite producing porous ceramic film 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；Alumina powder is uniformly mixed with kaolin, potassium feldspar, calcium carbonate, ammonium polymethacrylate and polyethyleneimine, is melted in high temperature Cinker clew furnace, microwave sintering is then carried out and obtains fused materials, fused materials are obtained into porous ceramic film using cold water water quenching；Isolated residue is obtained into sulfide through flotation；Sulfuric acid is made in sulfide processing.The present invention, which has, prepares porous ceramic film and relieving haperacidity is at low cost, and the utilization rate of ardealite and low product bauxite is high, and the porous ceramics film quality prepared using alumina powder is good, high mechanical strength, good penetrability, bending strength are high, and the feature that acid-making process is simple.
Description
Technical field
The present invention relates to the techniques of a kind of ardealite and low product bauxite producing porous ceramic film coproduction acid, belong to chemical metallurgy
Field.
Background technology
Porous ceramic film, with its excellent stability of material, in the process industrials such as oil and chemical industry, medicine, metallurgy
Various fields have been widely used, it has also become most rapid, most application prospect one of membrane material is developed in film field.It is existing
Technology in have a kind of Thief zone porous ceramic film, the ceramic membrane separation performance is good, reasonable price, intensity are high, applied widely,
But in the production of the porous ceramic film, need a large amount of aluminium oxide as raw material, and the manufacture craft of existing alumina powder
Complicated, production cost height, leads to alumina powder price, greatly improves the production cost of porous ceramic film.
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 producing porous ceramic film, 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 producing porous ceramic film coproduction acid.This hair
It is bright have prepare porous ceramic film and relieving haperacidity is at low cost, the utilization rate of ardealite and low product bauxite is high, using alumina powder system
Standby porous ceramics film quality is good, high mechanical strength, good penetrability, bending strength are high, and the feature that acid-making process is simple.
Technical scheme of the present invention
A kind of technique of ardealite and low product bauxite producing porous ceramic film 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 kaolin, potassium feldspar, calcium carbonate, ammonium polymethacrylate and polyethyleneimine
It is uniformly mixed, melts in high temperature Cinker clew furnace, then carry out microwave sintering and obtain fused materials, fused materials are obtained using cold water water quenching
Porous ceramic film；
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 producing porous ceramic film coproduction acid, in step A, the additive
For sodium carbonate, sodium sulphate or caustic soda；The modifying agent is anthracite, carbon or gangue.
In the technique of ardealite above-mentioned and low product bauxite producing porous ceramic film coproduction acid, in step A, the raw material
In, ardealite and low product bauxite are according to 1:The ratio of 0.9-1.7 weight ratios mixes, and additive adding proportion is pressed contained in raw material
Na2O 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.
In the technique of ardealite above-mentioned and low product bauxite producing porous ceramic film 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 producing porous ceramic film coproduction acid
Roasting time 1-2h at 1100-1350 DEG C.
In the technique of ardealite above-mentioned and low product bauxite producing porous ceramic film coproduction acid, in step B, the clinker is first
It is dissolved out after water mill；It is 4-6 that liquid when dissolution, which consolidates volume ratio,:1.
In the technique of ardealite above-mentioned and low product bauxite producing porous ceramic film coproduction acid, in step C, calcination is in temperature
Calcination time 3-5h at 900-1200 DEG C of degree.
In the technique of ardealite above-mentioned and low product bauxite producing porous ceramic film coproduction acid, in step D, by weight
Meter, the porous ceramic film include 10-15 parts of alumina powder, 50-55 parts of kaolin, 20-23 parts of potassium feldspar, 5-7 parts of calcium carbonate,
1-2 parts of 1-2 parts of ammonium polymethacrylate and polyethyleneimine.
In the technique of ardealite above-mentioned and low product bauxite producing porous ceramic film coproduction acid, in step D, the high temperature melting
Block stove is the high temperature melt 1.2-1.6h in the case where temperature is 1320-1360 DEG C.
In the technique of ardealite above-mentioned and low product bauxite producing porous ceramic film coproduction acid, in step D, the microwave is burnt
Knot is the microwave sintering 20-30min in the case where temperature is 1450-1480 DEG C.
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 porous ceramic film, 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 porous ceramic film.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
Raw material prepare using alumina powder prepare porous ceramics film quality is good, high mechanical strength, good penetrability, bending strength are high,
And porous ceramic film 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 detection.
1, the detection of porous ceramic film
Inventor is respectively detected the porous ceramic film in following five groups of embodiments, and testing result is as follows：
It is obtained by the Analysis of test results to 1 porous ceramic film of the present invention of table, porous ceramic film of the invention has porous ceramics
The advantage that film quality is good, high mechanical strength, good penetrability, bending strength are high.
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 producing porous ceramic film 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 1100 DEG C of temperature；Wherein, ardealite and low product bauxite are according to 1:The ratio of 0.9 weight ratio
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 900 DEG C of temperature；
F, by alumina powder made from step E and kaolin, potassium feldspar, calcium carbonate, ammonium polymethacrylate and polyethyleneimine
It is uniformly mixed, melts in high temperature Cinker clew furnace, high temperature Cinker clew furnace is the high temperature melt 1.2h, then in temperature in the case where temperature is 1320 DEG C
Degree is at 1450 DEG C, and microwave sintering 20min obtains fused materials, and fused materials are obtained porous ceramic film using cold water water quenching；Wherein
By weight, the porous ceramic film includes 10 parts of alumina powder, 50 parts of kaolin, 20 parts of potassium feldspar, 5 parts of calcium carbonate, gathers
1 part of 1 part of ammonium methacrylate and polyethyleneimine.
Embodiment 2：A kind of technique of ardealite and low product bauxite producing porous ceramic film 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 1.1 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 kaolin, potassium feldspar, calcium carbonate, ammonium polymethacrylate and polyethyleneimine
It is uniformly mixed, melts in high temperature Cinker clew furnace, high temperature Cinker clew furnace is the high temperature melt 1.4h, then in temperature in the case where temperature is 1340 DEG C
Degree is at 1460 DEG C, and microwave sintering 25min obtains fused materials, and fused materials are obtained porous ceramic film using cold water water quenching；Wherein
By weight, the porous ceramic film includes 12 parts of alumina powder, 53 parts of kaolin, 21 parts of potassium feldspar, 6 parts of calcium carbonate, gathers
2 parts of 1 part of ammonium methacrylate and polyethyleneimine.Embodiment 3：A kind of ardealite and low product bauxite producing porous ceramic film coproduction
The technique of 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 1.3 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 kaolin, potassium feldspar, calcium carbonate, ammonium polymethacrylate and polyethyleneimine
It is uniformly mixed, melts in high temperature Cinker clew furnace, high temperature Cinker clew furnace is the high temperature melt 1.6h, then in temperature in the case where temperature is 1360 DEG C
Degree is at 1480 DEG C, and microwave sintering 28min obtains fused materials, and fused materials are obtained porous ceramic film using cold water water quenching；Wherein
By weight, the porous ceramic film includes 13 parts of alumina powder, 54 parts of kaolin, 22 parts of potassium feldspar, 7 parts of calcium carbonate, gathers
2 parts of 2 parts of ammonium methacrylate and polyethyleneimine.Embodiment 4：A kind of ardealite and low product bauxite producing porous ceramic film coproduction
The technique of 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 1.5 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 kaolin, potassium feldspar, calcium carbonate, ammonium polymethacrylate and polyethyleneimine
It is uniformly mixed, melts in high temperature Cinker clew furnace, high temperature Cinker clew furnace is the high temperature melt 1.4h, then in temperature in the case where temperature is 1340 DEG C
Degree is at 1460 DEG C, and microwave sintering 25min obtains fused materials, and fused materials are obtained porous ceramic film using cold water water quenching；Wherein
By weight, the porous ceramic film includes 14 parts of alumina powder, 52 parts of kaolin, 23 parts of potassium feldspar, 6 parts of calcium carbonate, gathers
1 part of 2 parts of ammonium methacrylate and polyethyleneimine.Embodiment 5：A kind of ardealite and low product bauxite producing porous ceramic film coproduction
The technique of 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 1.7 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 kaolin, potassium feldspar, calcium carbonate, ammonium polymethacrylate and polyethyleneimine
It is uniformly mixed, melts in high temperature Cinker clew furnace, high temperature Cinker clew furnace is the high temperature melt 1.6h, then in temperature in the case where temperature is 1360 DEG C
Degree is at 1480 DEG C, and microwave sintering 30min obtains fused materials, and fused materials are obtained porous ceramic film using cold water water quenching；Wherein
By weight, the porous ceramic film includes 15 parts of alumina powder, 55 parts of kaolin, 23 parts of potassium feldspar, 7 parts of calcium carbonate, gathers
2 parts of 2 parts of ammonium methacrylate and polyethyleneimine.
Claims (10)
1. the technique of a kind of ardealite and low product bauxite producing porous ceramic film 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 kaolin, potassium feldspar, calcium carbonate, ammonium polymethacrylate and polyethyleneimine
It is uniformly mixed, melts in high temperature Cinker clew furnace, then carry out microwave sintering and obtain fused materials, fused materials are obtained using cold water water quenching
Porous ceramic film；
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 producing porous ceramic film 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 producing porous ceramic film coproduction acid, feature exist
In：In step A, in the raw material, ardealite and low product bauxite are according to 1:The ratio of 0.9-1.7 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 producing porous ceramic film 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 producing porous ceramic film coproduction acid, feature exist
In：It is the roasting time 1-2h at 1100-1350 DEG C of temperature in step A.
6. the technique of ardealite according to claim 1 and low product bauxite producing porous ceramic film coproduction acid, feature exist
In：In step B, dissolved out after clinker elder generation water mill；It is 4-6 that liquid when dissolution, which consolidates volume ratio,:1.
7. the technique of ardealite according to claim 1 and low product bauxite producing porous ceramic film coproduction acid, feature exist
In：In step C, calcination is the calcination time 3-5h at 900-1200 DEG C of temperature.
8. the technique of ardealite according to claim 1 and low product bauxite producing porous ceramic film coproduction acid, feature exist
In：In step D, by weight, the porous ceramic film includes 10-15 parts of alumina powder, 50-55 parts of kaolin, potassium feldspar
1-2 parts of 20-23 parts, 5-7 parts of calcium carbonate, 1-2 parts of ammonium polymethacrylate and polyethyleneimine.
9. the technique of ardealite according to claim 1 and low product bauxite producing porous ceramic film coproduction acid, feature exist
In：In step D, the high temperature Cinker clew furnace is the high temperature melt 1.2-1.6h in the case where temperature is 1320-1360 DEG C.
10. the technique of ardealite according to claim 1 and low product bauxite producing porous ceramic film coproduction acid, feature exist
In：In step D, the microwave sintering is the microwave sintering 20-30min in the case where temperature is 1450-1480 DEG C.
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