CN108726489A - A kind of technique of ardealite and coal ash for manufacturing train brake pad material coproduction acid - Google Patents
A kind of technique of ardealite and coal ash for manufacturing train brake pad material coproduction acid Download PDFInfo
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- CN108726489A CN108726489A CN201810713001.9A CN201810713001A CN108726489A CN 108726489 A CN108726489 A CN 108726489A CN 201810713001 A CN201810713001 A CN 201810713001A CN 108726489 A CN108726489 A CN 108726489A
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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
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
- C22C47/14—Making alloys containing metallic or non-metallic fibres or filaments by powder metallurgy, i.e. by processing mixtures of metal powder and fibres or filaments
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/14—Alloys containing metallic or non-metallic fibres or filaments characterised by the fibres or filaments
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Abstract
The present invention provides the techniques of a kind of ardealite and coal ash for manufacturing train brake pad material coproduction acid, include the following steps：Raw material are made in ardealite, flyash, 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 aluminium oxide；Aluminium oxide obtained is uniformly mixed with copper powder, iron powder, ferromanganese miberal powder, silica, molybdenum disulfide, boron nitride, graphite and polyacrylonitrile fibre through homogenizer, suppress biscuit, the biscuit is fixed on supporting steel back, train brake pad material is obtained by high temperature sintering；Isolated residue is obtained into sulfide through flotation；Sulfuric acid is made in sulfide processing.The present invention, which has, prepares train brake pad material and relieving haperacidity is at low cost, and waste residue utilization rate is high, and the train brake pad material prepared using alumina powder has the advantages that quality height, hardness and compression strength are high, and acid-making process is simple.
Description
Technical field
The present invention relates to the techniques of a kind of ardealite and coal ash for manufacturing train brake pad material coproduction acid, belong to chemical metallurgy neck
Domain.
Background technology
The brake lining material generally used in the prior art has two class of powder metallurgy and high molecular synthetic material, wherein macromolecule
Synthetic material because intensity is low, poor heat resistance, heat decline seriously, want by the braking for being not applied for 300 kilometers of speed per hour or more bullet train
It asks；And powder metallurgy is by optimization of C/C composites and technique, can reach that intensity is high, thermal conductivity is good, the advantages that stable friction performance, because
This is ideal brake lining brake material.Contain a large amount of aluminium oxide in the raw materials for production of existing train brake pad material
Powder, and the complex manufacturing technology of existing alumina powder, production cost are high, lead to alumina powder price, greatly increase row
The production cost of brake sheet material.
Ardealite refer in phosphoric acid production with sulfuric acid treating phosphorite when the solid slag that generates, main component is sulfuric acid
Calcium（CaSO4）, content generally can reach 70-90% or so.In addition, ardealite also contains plurality of impurities：Undecomposed phosphorus ore,
Phosphoric acid, calcirm-fluoride, iron, aluminium compound, acid non-soluble substance, organic matter of non-washes clean etc..Ardealite is discharged every year about in China
20000000 tons, add up nearly hundred million tons of discharge capacity.For utilization rate of the ardealite in terms of building materials less than 5%, a large amount of gypsum stacks occupy soil
Ground seriously pollutes environment.
China is a big coal country, using coal as power generation substantially fuel.The energy industry stable development in China, power generation
Ability annual growth is 7.3%, and the rapid development of power industry brings sharply increasing for flyash discharge capacity, Hazards in Power Plant
The flyash total amount discharged every year increases year by year, and nineteen ninety-five flyash discharge capacity is up to 1.25 hundred million tons, 2000 about 1.5 hundred million
Ton, was up to 300,000,000 tons, the development of the national economy and ecological environment to China cause huge pressure by 2010.
It is now currently, seldom for the technology of the comprehensive utilization of ardealite and flyash, it is substantially focused on building materials and paves the way
Etc. traditional fields, which results in the waste of a large amount of high value ingredients in ardealite and flyash, added value is very low.And by phosphorus stone
Cream and total utilization of PCA are come train brake pad material processed, while the technique of coproduction acid, have not been reported.
Goal of the invention
The object of the present invention is to provide the techniques of a kind of ardealite and coal ash for manufacturing train brake pad material coproduction acid.The present invention
With train brake pad material is prepared and relieving haperacidity is at low cost, waste residue utilization rate is high, the train brake pad material prepared using alumina powder
Have the advantages that high quality, hardness and compression strength are high, and acid-making process is simple.
Technical scheme of the present invention
A kind of technique of ardealite and coal ash for manufacturing train brake pad material coproduction acid, includes the following steps：
A, ardealite, flyash, additive and modifying agent are mixed and is ground and raw material are made, be sent into roasting in kiln, clinker is made；
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 copper powder, iron powder, ferromanganese miberal powder, silica, molybdenum disulfide, boron nitride, graphite
It is uniformly mixed through homogenizer with polyacrylonitrile fibre, suppresses biscuit, which is fixed on supporting steel back, passes through high temperature
It is sintered to obtain train brake pad material；
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 and coal ash for manufacturing train brake pad material coproduction acid above-mentioned, in step A, the additive is
Sodium carbonate, sodium sulphate or caustic soda；The modifying agent is anthracite, carbon or gangue.
In the technique of ardealite and coal ash for manufacturing train brake pad material coproduction acid above-mentioned, in step A, the raw material
In, ardealite and flyash are according to 1:The ratio of 1-1.9 weight ratios mixes, and additive 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.
In the technique of ardealite and coal ash for manufacturing train brake pad material coproduction acid above-mentioned, in step A, the kiln is industry
Rotary kiln, Industry Tunnel Kiln or industrial shaft kiln.
It is in temperature in step A in the technique of ardealite and coal ash for manufacturing train brake pad material coproduction acid above-mentioned
Roasting time 1-2h at 1000-1350 DEG C.
In the technique of ardealite and coal ash for manufacturing train brake pad material coproduction acid above-mentioned, in step B, clinker elder generation water
It is dissolved out after mill；It is 4-6 that liquid when dissolution, which consolidates volume ratio,:1.
In the technique of ardealite and coal ash for manufacturing train brake pad material coproduction acid above-mentioned, in step C, calcination is in temperature
Calcination time 3-5h at 800-1200 DEG C.
In the technique of ardealite and coal ash for manufacturing train brake pad material coproduction acid above-mentioned, in step D, by weight,
The train brake pad material includes 8-15 parts of alumina powder, 30-40 parts of copper powder, 10-15 parts of iron powder, 10-13 parts of ferromanganese miberal powder, two
0.4-0.8 parts of 2-4 parts of silica, 5-8 parts of molybdenum disulfide, 2-5 parts of boron nitride, 15-20 parts of graphite and polyacrylonitrile fibre.
In the technique of ardealite and coal ash for manufacturing train brake pad material coproduction acid above-mentioned, in step D, the compacting biscuit
Pressure be 600-700MPa.
In the technique of ardealite and coal ash for manufacturing train brake pad material coproduction acid above-mentioned, in step D, the high temperature sintering
Temperature be 850-1000 DEG C, sintering pressure control is in 2-6MPa, the high temperature sintering 3-4h in the case where applying hydrogen and being protected.
The present invention is by by ardealite and flyash reaction, recombination, making utility.The net reaction of principle
For：
CaSO4（Ardealite）+ Na2O·SiO2·Al2O3（Flyash）→ Na2O·Al2O3 + CaO·SiO2↓+[sulphur]
From the reaction equation it is found that with the SiO in the CaO and flyash in ardealite2Generate calcium orthosilicate（ CaO·SiO2↓）
Afterwards, soluble fabulous sodium aluminate is obtained（Na2O·Al2O3）.[sulphur] in reaction equation refers to by raw material doping and changing
Property agent technique, the metal sulfide of generation；After leaching the sodium aluminate in clinker, obtained sediment flotation be can be obtained into metal
Sulfide.
Advantageous effect
1, the present invention and is added after additive and modifying agent by using ardealite and flyash as raw material, in high temperature roasting
The clinker of main silicate-containing, aluminate and sulfide is obtained under the technique of burning, and the main component of the aluminate is sodium aluminate,
By sodium aluminate it is water-soluble go out after may be recovered, and after solid residue flotation, obtain sulfide, sulphur prepared using sulfide
Acid,
Aluminium oxide is prepared by the sodium aluminate of recycling, aluminium oxide and other raw materials are prepared into train brake pad material, due to entire work
Mainly using ardealite and flyash as raw material in skill, adds other a small amount of substances and therefore greatly reduce relieving haperacidity and train
The cost input of brake lining material.The utilization rate for also greatly increasing ardealite and fine coal waste slag, to alleviate ardealite and fine coal
Ash has important contribution to the pollution of environment.
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 prepares train brake pad material, and train brake pad material has the advantages that high quality, hardness and compression strength are high, and train brake pad
The cost of material is low.
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 train brake pad material
Inventor is respectively detected the train brake pad material in following five groups of embodiments, and testing result is shown in Table 1；
Obtained by 1 train brake pad material tests result table analysis of the present invention of table, train brake pad material of the present invention have quality it is high,
Hardness and the high advantage of compression strength.
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 coal ash for manufacturing train brake pad material coproduction acid, steps are as follows：
A, ardealite, flyash, sodium carbonate and anthracite 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 1000 DEG C；Wherein, ardealite and flyash are according to 1:The ratio of 1 weight ratio mixes, carbonic acid
Sodium adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, anthracitic mixed proportion are
The 10% 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 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 copper powder, iron powder, ferromanganese miberal powder, silica, molybdenum disulfide, boron nitride, graphite
It is uniformly mixed through homogenizer with polyacrylonitrile fibre, suppresses biscuit in the case where pressure is 600MPa, which is fixed on branch
It supports in steel back, by being 850 DEG C in temperature, sintering pressure control is in 2MPa, the high temperature sintering 3h in the case where applying hydrogen and being protected
Obtain train brake pad material；Wherein, by weight, the train brake pad material includes 8 parts of alumina powder, 30 parts of copper powder, iron powder
10 parts, 10 parts of ferromanganese miberal powder, 2 parts of silica, 5 parts of molybdenum disulfide, 2 parts of boron nitride, 15 parts of graphite and polyacrylonitrile fibre 0.4
Part.
Embodiment 2：A kind of technique of ardealite and coal ash for manufacturing train brake pad material coproduction acid, steps are as follows：
A, ardealite, flyash, sodium sulphate and carbon are mixed and is ground and raw material are made, be sent into industrial rotary kiln in temperature 1200
Clinker is made in roasting time 2h at DEG C；Wherein, ardealite and flyash are according to 1:The ratio of 1.2 weight ratios mixes, caustic soda addition
Ratio presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:The mixed proportion of 1.2 additions, carbon is raw material gross weight
The 15% of amount；
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 copper powder, iron powder, ferromanganese miberal powder, silica, molybdenum disulfide, boron nitride, graphite
It is uniformly mixed through homogenizer with polyacrylonitrile fibre, suppresses biscuit in the case where pressure is 650MPa, which is fixed on branch
It supports in steel back, by being 900 DEG C in temperature, sintering pressure control is in 4MPa, the high temperature sintering 4h in the case where applying hydrogen and being protected
Obtain train brake pad material；Wherein, by weight, the train brake pad material includes 15 parts of alumina powder, 30 parts of copper powder, iron powder
13 parts, 10 parts of ferromanganese miberal powder, 4 parts of silica, 6 parts of molybdenum disulfide, 4 parts of boron nitride, 18 parts of graphite and polyacrylonitrile fibre 0.5
Part.
Embodiment 3：A kind of technique of ardealite and coal ash for manufacturing train brake pad material coproduction acid, steps are as follows：
A, ardealite, flyash, 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；Wherein, ardealite and flyash are according to 1:The ratio of 1.4 weight ratios mixes, carbon
Sour sodium adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, the mixed proportion of gangue
It 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 copper powder, iron powder, ferromanganese miberal powder, silica, molybdenum disulfide, boron nitride, graphite
It is uniformly mixed through homogenizer with polyacrylonitrile fibre, suppresses biscuit in the case where pressure is 700MPa, which is fixed on branch
It supports in steel back, by being 950 DEG C in temperature, sintering pressure control is in 5MPa, the high temperature sintering 4h in the case where applying hydrogen and being protected
Obtain train brake pad material；Wherein, by weight, the train brake pad material includes 10 parts of alumina powder, 35 parts of copper powder, iron powder
15 parts, 12 parts of ferromanganese miberal powder, 3 parts of silica, 7 parts of molybdenum disulfide, 4 parts of boron nitride, 20 parts of graphite and polyacrylonitrile fibre 0.6
Part.
Embodiment 4：A kind of technique of ardealite and coal ash for manufacturing train brake pad material coproduction acid, steps are as follows：
A, ardealite, flyash, sodium carbonate 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 1h at 1350 DEG C；Wherein, ardealite and flyash are according to 1:The ratio of 1.6 weight ratios mixes, caustic soda
Adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, the mixed proportion of gangue are made a living
Expect the 25% of 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 copper powder, iron powder, ferromanganese miberal powder, silica, molybdenum disulfide, boron nitride, graphite
It is uniformly mixed through homogenizer with polyacrylonitrile fibre, suppresses biscuit in the case where pressure is 650MPa, which is fixed on branch
It supports in steel back, by being 1000 DEG C in temperature, sintering pressure control is in 6MPa, the high temperature sintering 3h in the case where applying hydrogen and being protected
Obtain train brake pad material；Wherein, by weight, the train brake pad material includes 13 parts of alumina powder, 38 parts of copper powder, iron powder
13 parts, 11 parts of ferromanganese miberal powder, 4 parts of silica, 6 parts of molybdenum disulfide, 3 parts of boron nitride, 18 parts of graphite and polyacrylonitrile fibre 0.7
Part.
Embodiment 5：A kind of technique of ardealite and coal ash for manufacturing train brake pad material coproduction acid, steps are as follows：
A, ardealite, flyash, sodium sulphate and anthracite 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 flyash are according to 1:The ratio of 1.9 weight ratios mixes, caustic soda
Adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, anthracitic mixed proportion are made a living
Expect the 20% of 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 copper powder, iron powder, ferromanganese miberal powder, silica, molybdenum disulfide, boron nitride, graphite
It is uniformly mixed through homogenizer with polyacrylonitrile fibre, suppresses biscuit in the case where pressure is 700MPa, which is fixed on branch
It supports in steel back, by being 1000 DEG C in temperature, sintering pressure control is in 6MPa, the high temperature sintering 4h in the case where applying hydrogen and being protected
Obtain train brake pad material；Wherein, by weight, the train brake pad material includes 15 parts of alumina powder, 40 parts of copper powder, iron powder
15 parts, 13 parts of ferromanganese miberal powder, 4 parts of silica, 8 parts of molybdenum disulfide, 5 parts of boron nitride, 20 parts of graphite and polyacrylonitrile fibre 0.8
Part.
Claims (10)
1. the technique of a kind of ardealite and coal ash for manufacturing train brake pad material coproduction acid, which is characterized in that include the following steps：
A, ardealite, flyash, additive and modifying agent are mixed and is ground and raw material are made, be sent into roasting in kiln, clinker is made；
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 copper powder, iron powder, ferromanganese miberal powder, silica, molybdenum disulfide, boron nitride, graphite
It is uniformly mixed through homogenizer with polyacrylonitrile fibre, suppresses biscuit, which is fixed on supporting steel back, passes through high temperature
It is sintered to obtain train brake pad material；
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 coal ash for manufacturing train brake pad material coproduction acid, it is characterised in that：
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 coal ash for manufacturing train brake pad material coproduction acid, it is characterised in that：
In step A, in the raw material, ardealite and flyash are according to 1:The ratio of 1-1.9 weight ratios mixes, additive adding proportion
By contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:The mixed proportion of 1 addition, modifying agent is raw material total weight
10-25%.
4. the technique of ardealite according to claim 1 and coal ash for manufacturing train brake pad material coproduction acid, it is characterised in that：
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 coal ash for manufacturing train brake pad material coproduction acid, it is characterised in that：
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 coal ash for manufacturing train brake pad material coproduction acid, it is characterised in that：
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 coal ash for manufacturing train brake pad material coproduction acid, it is characterised in that：
In step C, calcination is the calcination time 3-5h at 800-1200 DEG C of temperature.
8. the technique of ardealite according to claim 1 and coal ash for manufacturing train brake pad material coproduction acid, it is characterised in that：
In step D, by weight, the train brake pad material includes 8-15 parts of alumina powder, 30-40 parts of copper powder, iron powder 10-15
Part, 10-13 parts of ferromanganese miberal powder, 2-4 parts of silica, 5-8 parts of molybdenum disulfide, 2-5 parts of boron nitride, 15-20 parts of graphite and poly- third
0.4-0.8 parts of alkene nitrile fiber.
9. the technique of ardealite according to claim 1 and coal ash for manufacturing train brake pad material coproduction acid, it is characterised in that：
In step D, the pressure of the compacting biscuit is 600-700MPa.
10. the technique of ardealite according to claim 1 and coal ash for manufacturing train brake pad material coproduction acid, feature exist
In：In step D, the temperature of the high temperature sintering is 850-1000 DEG C, and sintering pressure control is carried out in 2-6MPa applying hydrogen
The lower high temperature sintering 3-4h of protection.
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