CN113493217B - Treatment method for recycling aluminum slag ash - Google Patents
Treatment method for recycling aluminum slag ash Download PDFInfo
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- CN113493217B CN113493217B CN202010420700.1A CN202010420700A CN113493217B CN 113493217 B CN113493217 B CN 113493217B CN 202010420700 A CN202010420700 A CN 202010420700A CN 113493217 B CN113493217 B CN 113493217B
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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
- C01F7/021—After-treatment of oxides or hydroxides
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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
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses a treatment method for recycling aluminum slag ash, which comprises the following steps: crushing and screening the recovered aluminum slag to obtain aluminum slag ash; adding a proper amount of aluminum powder modifier into aluminum slag ash in a stirring tank, and stirring to form a mixture; providing a kinetic energy dryer with a height of more than 12 meters, and heating the mixture from top to bottom at a decreasing temperature of 1400 ℃ to 600 ℃ to remove aluminum nitride and aluminum carbide contained in the aluminum slag ash and generate alumina powder; the alumina powder recovered by the invention can not be separated into ammonia and methane, can achieve the effect of stable property, has good texture, can be prepared into high-alumina refractory materials (non-shaped mud-like or powdery and shaped refractory materials), ceramic, cement and other recycled raw materials, and further improves the economic value.
Description
Technical Field
The invention relates to a resource recycling method, in particular to an aluminum slag ash recycling treatment method which uses aluminum powder modifier to mix and heat aluminum slag ash with environmental pollution hazard to qualify the aluminum slag ash, and uses the aluminum slag ash as a resource raw material.
Background
At present, in the secondary smelting process of the waste aluminum material, metal aluminum is melted into aluminum water under the action of high temperature; because of the high chemical activity of aluminum element, the surface of aluminum water is easy to act with oxygen in air, and an aluminum oxide thin layer is formed on the surface of aluminum water, and the aluminum oxide thin layer is aluminum slag generated by secondary aluminum smelting; since some aluminum is left in the aluminum slag, the aluminum slag is generally treated by screening and recovering aluminum, and the remainder is discarded, namely secondary aluminum slag ash, which is called aluminum slag ash for short.
The aluminum slag ash comprises aluminum oxide, fine metal aluminum, salts, aluminum nitride, aluminum carbide, magnesium oxide, silicon oxide and ferric oxide, wherein the particle size is generally below 20 meshes, and the whole aluminum slag ash is in powder shape; wherein, aluminum nitride and aluminum carbide account for about 20% of the weight of aluminum slag ash, and when the aluminum slag ash contacts with water, aluminum nitride can be continuously decomposed to release ammonia gas with odor, aluminum carbide can be decomposed to release combustible gas methane, and serious pollution is caused to the environment.
Because aluminum slag ash reacts with water to generate gases such as ammonia gas, methane and the like, thereby causing stink and damaging the environment, the environmental protection department of the government has more restrictions on the aluminum slag ash as waste treatment. Because the aluminum slag ash accounts for about 35-55% of the weight of the aluminum oxide and the silicon dioxide and has excellent fire resistance, the late near-field operators mostly prepare the aluminum slag ash into the raw materials of the fire-resistant materials, thereby not only reducing the pollution impact on the environment, but also achieving the purpose of recycling the aluminum slag ash and even creating higher economic value.
However, according to the disclosure of "research on producing refractory materials from aluminum-smelted slag" by the "society of mining and metallurgy engineering", aluminum nitride in aluminum slag ash acts on an aqueous solution of a binder to crack coarse embryos of refractory materials, or to release pungent ammonia gas during the production process, or to crack the coarse embryos by the escaping ammonia gas, resulting in poor surface fineness of the finished products; therefore, how to thoroughly treat the aluminum slag ash in a harmless way and how to improve the quality of the raw materials recycled by the aluminum slag ash is a problem to be solved in the industry.
Furthermore, alumina (Al) 2 O 3 ) The alumina has the highest hardness in the oxide, and can be used for shaft seals, bearings, grinding materials, grinding wheels, dies, cutters, artificial gems and the like. The aluminum oxide has high stability and excellent corrosion resistance to most of acidic, alkaline, salt and molten solutions, and can be used for thermocouple protection tubes, furnace tubes, crucibles and refractory materials. Meanwhile, the aluminum oxide ceramic composite material has high insulating strength, high resistivity and low dielectric loss, and can be used for insulating seats and integrated circuit substrates, so that a large amount of aluminum oxide is used for replacing metal parts, the defects of easy corrosion, poor wear resistance, insufficient strength, easy deformation, poor high temperature resistance and the like are overcome, the aluminum oxide ceramic component is used in the high-tech semiconductor industry, and other industries are gradually adopted for improving the efficiency and reducing the cost. Thus, alumina (Al 2 O 3 ) The method is a material with high value, so that the method can thoroughly treat the aluminum slag ash in a harmless way, can recycle resources, and obtain high-quality alumina recycled raw materials, and is the technical problem to be solved by the method.
Disclosure of Invention
Accordingly, the present invention has as its primary object to provide a method for qualifying aluminum slag ash and further providing the aluminum slag ash as a source material for recycling.
To achieve the above object, the present invention adopts the steps of: (a) The aluminum slag waste produced by smelting is subjected to pre-treatment of crushing and screening to obtain metal aluminum with the particle size larger than a preset mesh number (mesh) and aluminum slag ash with the particle size smaller than the preset mesh number; (b) Adding a proper amount of aluminum powder modifier into the aluminum slag ash obtained in the previous step, and stirring to obtain a uniform mixture; (c) Providing a kinetic energy dryer which is vertical and has a height of at least more than 12 meters, heating the interior of the dryer to enable the interior of the dryer to have a decreasing temperature of 1400-600 ℃ from top to bottom, and heating the mixture in the step (b) to remove aluminum nitride and aluminum carbide contained in aluminum slag ash so as to achieve the effect of qualitative treatment; and (d) recovering the alumina powder produced by the qualitative treatment, and discharging the exhaust gas to the atmosphere after guiding.
Preferably, the aluminum powder modifier in the invention comprises any one of phosphoric acid and sulfuric acid.
Preferably, the exhaust gas from step (d) of the present invention further comprises a post-treatment step for separating and recovering alumina fine powder entrained in the exhaust gas and discharging the clean exhaust gas to the atmosphere.
Wherein, preferably, the pre-treatment in the invention is to crush the aluminum slag by a grinding device, and then to apply a screening device to the rear end of the grinding device to screen the aluminum slag to obtain aluminum slag ash; a stirring tank which is
The aluminum slag ash is placed at the rear end of the screening equipment to contain the aluminum slag ash and the aluminum powder modifier and then is stirred into a uniform mixture; a feeding pipe arranged at the rear end of the stirring tank and used for feeding the mixture into a kinetic energy dryer; a plurality of heating devices, which are respectively arranged at the outer periphery of the kinetic energy dryer, heat the mixture to remove aluminum nitride and aluminum carbide contained in aluminum slag ash, achieve the effect of qualitative treatment, and simultaneously produce alumina powder to fall into a collecting bag arranged at the lower end of the kinetic energy dryer for recovery; the post-treatment equipment comprises a cyclone separator, a cloth bag dust collector, an induced draft fan and a discharge pipe, and is connected with the kinetic energy dryer by an air pipe so as to discharge waste gas in the kinetic energy dryer through the post-treatment equipment, alumina fine powder mixed with the waste gas is recovered through the cyclone separator and the cloth bag dust collector respectively, and clean waste gas is led into the discharge pipe through the induced draft fan and discharged to the atmosphere.
Preferably, the heating device of the kinetic energy dryer is a gas burner, and the gas burner is used for burning gas to heat the mixture.
Preferably, in the present invention, the plurality of nozzles are disposed at the periphery of the furnace wall of the kinetic energy dryer, and are respectively disposed tangentially to the furnace wall and upwardly, and the inlet end of the nozzles is further connected to the feed pipe, so that the mixture is sucked by the negative pressure at the inner edge of the kinetic energy dryer, swirled to the top end by the cyclone airflow, and moved downwardly in a swirling state, so that the mixture is fully and uniformly acted on the heat energy, thereby forming the alumina powder product with high hardness, high density and high purity.
Compared with the prior art, the invention has the beneficial effects that:
according to the method, aluminum nitride and aluminum carbide in aluminum powder modifier of aluminum slag ash mixed phosphoric acid or sulfuric acid can be subjected to chemical reaction to release ammonia gas and methane, and then a kinetic energy dryer is used for heating, so that the ammonia gas and methane are completely combusted, and the problem of environmental protection is effectively solved; meanwhile, aluminum nitride and aluminum carbide which do not react chemically in the front section react with oxygen in the kinetic energy dryer to generate aluminum oxide, and the aluminum oxide product in the section is heated in the kinetic energy dryer together with aluminum oxide contained in the original aluminum slag ash, so that fine white aluminum oxide powder with high hardness, high density and high purity is generated and recovered; the alumina powder recovered by the invention can not be used for regenerating ammonia and methane, can achieve the effect of stable property, has good texture, can be prepared into high-alumina refractory materials (non-shaped mud-like or powdery and shaped refractory materials), ceramic, cement and other resource raw materials, further improves the economic value and benefits the industry.
Drawings
FIG. 1 is a schematic flow chart of the steps of the present invention;
fig. 2 is a schematic flow chart of the device of the present invention.
Symbol description:
10: grinding device
20: screening apparatus
30: stirring tank
40: material feeding pipe
50: kinetic energy dryer
51: heating device/gas burner
52: nozzle
60: cyclone separator
70: cloth bag dust remover
80: draught fan
91: discharge pipe
92: air duct
B: collecting bag
R1: aluminium slag
R21: metallic aluminum
R22: aluminum slag ash
R23: aluminum powder modifier
R3: mixture of
R4: gas burner
R51: alumina powder
R52: exhaust gas
R53: alumina fine powder
Detailed Description
Firstly, the flow of the treatment method for recycling the aluminum slag ash mainly comprises three parts of pretreatment, qualitative modification treatment and post treatment; because the aluminum slag produced in the aluminum smelting process of the regenerative aluminum factory contains 15-40% of metal aluminum components, the aluminum slag can be recycled and remelted; the recovery method belongs to pre-treatment, and is characterized in that aluminum slag is crushed by adopting grinding equipment, metal aluminum with the grain diameter of more than 80 meshes is recovered and smelted by adopting screening equipment, and aluminum slag ash with the grain diameter of more than 100 meshes enters subsequent qualitative modification treatment.
Firstly, placing aluminum slag ash in a stirring tank, adding a proper amount of aluminum powder modifier, and stirring in the stirring tank to form a uniform mixture, wherein the aluminum powder modifier comprises any one of phosphoric acid and sulfuric acid, and aluminum nitride and aluminum carbide in the mixture are subjected to the following chemical reaction with the phosphoric acid or sulfuric acid;
1.AlN+H 3 PO4→Al 4 PO 4 +NH 3
(1) (aluminum nitride) + (phosphoric acid) → (aluminum phosphate) + (ammonia gas)
2.2AlC+8H 3 PO4→8Al 4 PO 4 +6CH 3 +3H 2
(2) (aluminum carbide) + (phosphoric acid) → (aluminum phosphate) + (methane) + (hydrogen)
3.2AlN+3H2SO4→Al2(SO4)3+2NH3
(3) (aluminum nitride) + (sulfuric acid) → (aluminum sulfate) + (ammonia gas)
4.Al4C3+6H2SO4→2Al2(SO4)3+3CH3+3/2H2
(4) (aluminum carbide) + (sulfuric acid) → (aluminum sulfate) + (methane) + (hydrogen)
Secondly, the mixture after chemical reaction is sent into a kinetic energy dryer by using a feeding pipe, wherein the kinetic energy dryer is heated by a plurality of heating devices, the height of the kinetic energy dryer is preferably more than 12 meters, and the heating devices enable the mixture to be sufficiently heated by a gas burner in a gas burning mode, so that ammonia, methane and hydrogen produced after chemical reaction are completely burnt and taken away along with waste gas; the kinetic energy dryer is at a decreasing temperature of 1400-600 ℃ from top to bottom, the mixture is brought to the top end by hot air and falls from the upper end, aluminum nitride and aluminum carbide which are not subjected to chemical reaction by the aluminum powder modifier including phosphoric acid or sulfuric acid are subjected to the following chemical reaction with oxygen in the kinetic energy dryer;
5.4AlN+7O 2 →2Al 2 O 3 +4NO 2
(5) (aluminum nitride) + (oxygen) - (aluminum oxide) + (nitrogen dioxide)
6.Al 4 C 3 +6O 2 →2Al 2 O 3 +3CO 2
(6) (aluminum carbide) + (oxygen) - (aluminum oxide) + (carbon dioxide)
The alumina generated by the action of the oxygen and the original alumina slag ash are continuously heated in a kinetic energy dryer together, so that a fine white alumina powder product with high hardness, high density and high purity is generated; in the process, the alumina powder falls into a collecting bag from the lower part of the kinetic energy dryer to be recovered.
Then, the waste gas containing dust-like particles in the kinetic energy dryer is discharged from the furnace wall for post-treatment; wherein, the purpose of the post-treatment is to further collect alumina fine powder entrained in the waste gas, the post-treatment equipment comprises a cyclone separator, a bag-type dust collector, an induced draft fan and a discharge pipe, and an air pipe is used to connect the cyclone separator, the alumina fine powder entrained in the waste gas is recovered by the cyclone separator and the bag-type dust collector respectively, and clean waste gas is led into the discharge pipe through the induced draft fan and discharged to the atmosphere; according to the principle, a cyclone separator is a device for separating gas and solid, which applies fluid rotation to throw solid particles with large inertial centrifugal force to an outer wall surface for separation, and is suitable for capturing dust with a diameter of more than 10 mu m. Further, the bag-type dust collector is a device for collecting solid particles in dust-containing gas by using a bag-shaped filter assembly made of fabric, and is suitable for collecting dust which has smaller particles and is difficult to be recovered by a general dust collector; furthermore, collecting bags are arranged below the cyclone separator and the cloth bag dust collector and used for respectively recovering alumina fine powder with the particle size of more than 10 mu m and smaller particle size; finally, the clean waste gas after the complete separation of the alumina particles is led into a discharge pipe through a draught fan and discharged into the atmosphere.
Referring to the procedure, the process of the aluminum slag ash recycling treatment method of the present invention is shown in fig. 1, and comprises the steps of:
(a) The aluminum slag waste produced by smelting is subjected to pre-treatment of crushing and screening to obtain metal aluminum with the grain diameter larger than the preset mesh number and aluminum slag ash with the grain diameter smaller than the preset mesh number;
(b) Adding a proper amount of aluminum powder modifier into the aluminum slag ash obtained in the previous step, and stirring to obtain a uniform mixture;
(c) Providing a kinetic energy dryer which is vertical and has a height of at least more than 12 meters, and heating the interior of the dryer to ensure that the interior of the kinetic energy dryer is gradually decreased from 1400 ℃ to 600 ℃ from top to bottom, so as to remove aluminum nitride and aluminum carbide contained in aluminum slag ash, thereby achieving the effect of qualitative treatment; and
(d) And (3) recycling the alumina powder produced by the qualitative treatment, and discharging the waste gas to the atmosphere after further separating alumina fine powder by post-treatment.
FIG. 2 shows the apparatus for the treatment method for recycling aluminum slag ash according to the present invention, wherein the pre-treatment is to crush the aluminum slag R1 by a grinding apparatus 10, screen the aluminum slag R1 by a screening apparatus 20 at the rear end of the grinding apparatus 10, recover and re-smelt the aluminum metal R21 with a grain size greater than 80 meshes, and enter the aluminum slag ash R22 with a grain size less than 100 meshes or more for the subsequent qualitative modification treatment; a stirring tank 30 disposed at the rear end of the screening apparatus 20 for holding the aluminum slag ash R22 and the aluminum powder modifier R23 and stirring the mixture into a uniform mixture R3; a feeding pipe 40 disposed at the rear end of the stirring tank 30 for feeding the mixture R3 into the kinetic energy dryer 50; a plurality of heating devices 51 are disposed at the outer periphery of the kinetic energy dryer 50 to heat the mixture R3.
In the invention, the height of the kinetic energy dryer 50 is preferably more than 12 meters, and the heating device 51 is distributed on the periphery of the furnace wall of the upper half section of the kinetic energy dryer 50 in a mode that the gas burner 51 burns the gas R4; the kinetic energy dryer 50 is provided with 8 nozzles 52 at the periphery of the middle furnace wall, the nozzles 52 are respectively arranged in a tangential direction with the furnace wall and the outlet end is upwards, the feeding pipe 40 is connected with the inlet end of the nozzles 52, the mixture R3 is sucked by the negative pressure of the inner edge of the furnace wall and swirled to the top end by cyclone-shaped air flow, the kinetic energy dryer 50 is distributed in a descending manner from top to bottom by the arrangement of the gas burner 51, the different air flow densities of the top end and the bottom end cause vortex effect to lead the mixture R3 to move downwards, the mixture R3 acts with heat energy uniformly and fully, and alumina powder R51 products with high hardness, high density and high purity are formed to fall into a collecting bag B arranged at the lower end of the kinetic energy dryer 50 for recovery.
Next, the post-treatment apparatus includes a cyclone 60, a bag-type dust collector 70, a induced draft fan 80, and a discharge pipe 91, and an air duct 92 is used to connect the cyclone 60, the bag-type dust collector 70, and the induced draft fan 80 to each other, so that the waste gas R52 in the kinetic energy dryer 50 is discharged through the post-treatment apparatus, and the alumina fine powder R53 entrained therein is recovered by the cyclone 60 and the bag-type dust collector 70 and falls into the collecting bag B, and the clean waste gas R52 is led into the discharge pipe 91 through the induced draft fan 80 and discharged to the atmosphere.
The invention mixes aluminum slag ash R22 with aluminum powder modifier R23 of phosphoric acid or sulfuric acid, which makes about 20% of aluminum nitride and aluminum carbide in weight of the aluminum slag ash R22 produce chemical reaction to release ammonia gas and methane which impact the environment, then uses kinetic energy dryer 50 to heat the ammonia gas and methane at a decreasing temperature of 12 m and 1400-600 ℃ to make the ammonia gas and methane completely burnt; meanwhile, aluminum nitride and aluminum carbide which do not react chemically at the front stage are further reacted with oxygen in the kinetic energy dryer 50 to generate aluminum oxide, and the aluminum oxide at the front stage and the aluminum oxide accounting for 35-55% of the weight of aluminum slag ash are heated in the kinetic energy dryer 50 together to generate fine white aluminum oxide powder R51 and aluminum oxide fine powder R53 with high hardness, high density and high purity, so that raw materials such as high aluminum refractory materials (amorphous mud-shaped or powdery and shaped refractory materials), ceramics, cement and the like can be prepared; the invention not only can remove aluminum nitride and aluminum carbide in the aluminum slag ash R22 in the treatment process and effectively solve the problem of environmental protection, but also can further take high-quality alumina powder R51 and alumina fine powder R53 as raw materials for recycling, thereby improving the economic value and benefiting the industry.
The drawings and descriptions disclosed above are merely preferred embodiments of the invention, and modifications and equivalent variations within the spirit and scope of the present invention will be included in the claims.
Claims (4)
1. The treatment method for recycling the aluminum slag ash is characterized by comprising the following steps of:
(a) The aluminum slag waste produced by smelting is subjected to pre-treatment of crushing and screening to obtain metal aluminum with the particle size larger than the preset mesh number and aluminum slag ash with the particle size smaller than the preset mesh number;
(b) Adding a proper amount of aluminum powder modifier into the aluminum slag ash obtained in the previous step, and stirring to form a uniform mixture; the aluminum powder modifier comprises any one of phosphoric acid and sulfuric acid;
(c) Providing a kinetic energy dryer, wherein the kinetic energy dryer is vertical and has a height of at least more than 12 meters, a plurality of heating devices are respectively arranged at the periphery of the wall of the kinetic energy dryer to heat the interior, so that the interior of the kinetic energy dryer is gradually reduced in temperature distribution from top to bottom, 1400 ℃ to 600 ℃, the mixture is fed into inlets of a plurality of nozzles through a feeding pipe, the nozzles are respectively arranged at the periphery of the middle section of the kinetic energy dryer and are respectively tangential to the wall, and the outlet ends of the nozzles are upwards arranged, the mixture is sucked by negative pressure at the inner edge of the wall, and whirls to the top end through cyclone-shaped airflow, the different airflow densities at the top end and the bottom end cause vortex effect to enable the mixture to move downwards and fully and uniformly act with heat energy, so that ammonia gas and methane released by chemical reaction of aluminum nitride and aluminum carbide in aluminum slag ash are completely combusted, further the qualitative treatment effect is achieved, and aluminum oxide powder with high purity is enabled to fall into the lower end of the kinetic energy dryer; and
(d) The alumina powder produced by the qualitative treatment is recovered, and the waste gas is discharged to the atmosphere after being guided.
2. The method of claim 1, wherein the exhaust gas of step (d) further comprises a post-treatment step (e) for separating and recovering alumina fine powder entrained in the exhaust gas and discharging the clean exhaust gas to the atmosphere.
3. The method for treating aluminum slag ash according to claim 2, wherein,
crushing aluminum slag by using a grinding device, and screening the aluminum slag by using a screening device at the rear end of the grinding device to obtain aluminum slag ash;
in the step (b), a stirring tank is arranged at the rear end of the screening equipment to hold the aluminum slag ash and the aluminum powder modifier and then stirred into a uniform mixture;
in the step (c), a feeding pipe is arranged at the rear end of the stirring tank and used for feeding the mixture into the kinetic energy dryer; and a plurality of heating devices are respectively arranged at the outer periphery of the kinetic energy dryer and used for heating the mixture to qualify the alumina in the aluminum slag ash and enable the generated alumina powder to fall into a collecting bag arranged at the lower end of the kinetic energy dryer for recovery;
the post-treatment in the step (e) is to use an air pipe to connect the air pipe and the kinetic energy dryer, so that the waste gas in the kinetic energy dryer is discharged through the air pipe, the alumina fine powder mixed with the waste gas is respectively recovered through a cyclone separator and a bag-type dust remover, and clean waste gas is led into an exhaust pipe through a draught fan and is discharged to the atmosphere.
4. The method of claim 3, wherein the heating device of the kinetic energy dryer is a gas burner, and the gas burner is used for burning gas to heat the mixture.
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| TW109111660A TWI772774B (en) | 2020-04-07 | 2020-04-07 | The treatment method of aluminum slag ash reuse |
| TW109111660 | 2020-04-07 |
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| TW583155B (en) * | 2002-11-19 | 2004-04-11 | Spire Environmental Prot Techn | Method for recycling aluminum slag ash |
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|---|---|---|---|---|
| JP2000210635A (en) * | 1999-01-22 | 2000-08-02 | Nippon Light Metal Co Ltd | Treatment of aluminum dross residual ash |
| JP2001072461A (en) * | 1999-08-31 | 2001-03-21 | Nippon Light Metal Co Ltd | Treatment of aluminum dross residual ash |
| JP2002045824A (en) * | 2000-08-07 | 2002-02-12 | Nippon Light Metal Co Ltd | Method for treating aluminum dross residual ash |
| TW455514B (en) * | 2000-08-18 | 2001-09-21 | Tsai Shuen Yuan | Method for recycling aluminum slag |
| TW200940457A (en) * | 2008-03-28 | 2009-10-01 | An-Cheng Lee | Process and apparatus of deodorizing and recycling aluminum slag |
| CN102020301A (en) * | 2009-09-16 | 2011-04-20 | 白银中天化工有限责任公司 | Aluminium hydroxide drying system |
| CN209940815U (en) * | 2019-05-09 | 2020-01-14 | 杭州浩斌科技有限公司 | Waste heat flue gas sludge drying system |
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| Publication number | Publication date |
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| TW202138303A (en) | 2021-10-16 |
| TWI772774B (en) | 2022-08-01 |
| CN113493217A (en) | 2021-10-12 |
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