CN106319220A - Method for extracting aluminum and chloride from aluminum ash - Google Patents
Method for extracting aluminum and chloride from aluminum ash Download PDFInfo
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- CN106319220A CN106319220A CN201510351226.0A CN201510351226A CN106319220A CN 106319220 A CN106319220 A CN 106319220A CN 201510351226 A CN201510351226 A CN 201510351226A CN 106319220 A CN106319220 A CN 106319220A
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- aluminum
- ash
- chloride
- aluminum ash
- slag
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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
Abstract
The invention relates to a method for extracting aluminum and chloride from aluminum ash, which is suitable for comprehensive utilization of industrial waste slag--aluminum ash produced in a remelting casting process in electrolytic aluminum plants, aluminum processing plants and reclaimed aluminum plants. The method is characterized by comprising the following steps: heating the aluminum ash to completely melt the aluminum in the aluminum ash, layering the molten aluminum and molten slag, and then sucking out and directly sending the molten aluminum for casting; soaking the molten slag with water to dissolve the chloride in the aluminum ash into the water, and then carrying out solid-liquid separation; and carrying out evaporation the obtained liquid phase to obtain chloride crystals, and taking the obtained solid phase as a raw material of alumina production. The method has the advantages that the process flow is short; the operation is convenient; industrial implementation is easy; all kinds of valuable components in the aluminum ash can be extracted; the comprehensive utilization value and the recovery rate are high; the recovery rate of the metal aluminum in the aluminum ash is equal to or higher than 85 %; and the recovery rate of the chloride is equal to or higher than 80%.
Description
Technical field
The present invention relates to a kind of aluminum ash that processes and extract aluminum and muriatic method, it is adaptable to the comprehensive utilization of the industrial residue aluminum ash that electrolytic aluminium factory, aluminum fabrication plant, regeneration aluminium manufacturer remelting and casting process produce.
Background technology
Aluminum ash is the molten slag that produces during refining aluminium of aluminum liquid, aluminium ingot, secondary aluminium melting and outer skin, and aluminum ash is a kind of yield industrial residue big, with serious pollution, is mainly derived from electrolytic aluminium factory, the casting process of aluminum fabrication plant and the melting and casting operation of regeneration aluminium manufacturer.According to statistics, often one ton of primary aluminum of processing, about produce 20-40 kg aluminium ash, during the direct founding of aluminum liquid, generation amount is less, and during aluminium ingot remelting, generation amount is more；Regenerate one ton of aluminium scrap and about produce 100-250 kg aluminium ash.Aluminum ash outward appearance is silver gray, powder, and character is similar to flyash.Being mainly composed of of aluminum ash: metallic aluminium about 10%-30%, aluminium oxide about 30%-70%, silicon dioxide and ferrum oxide about 5%-15%, the chloride about 10%-30% of potassium sodium calcium and magnesium.Aluminum ash has the highest recycling and is worth.At present, the applied research of domestic and international aluminum ash is concentrated mainly on following several respects: reclaim aluminum and aluminium oxide；Synthesizing efficient water treatment flocculant aluminium polychlorid；Produce aluminum sulfate；Aluminum ash is used in construction material.
Summary of the invention
The purpose of the present invention is aiming at the deficiency that above-mentioned prior art exists, it is provided that a kind of technological process is short, easy to operate, be prone to the extraction aluminum ash of industrial implementation in aluminum and muriatic method.
It is an object of the invention to be achieved through the following technical solutions.
A kind of extract aluminum and muriatic method in aluminum ash, it is characterised in that its extraction process be the aluminum in aluminum ash is completely melt and is layered with slag by the heating of aluminum ash after, casting is directly sent in aluminum liquid sucking-off；The chloride in aluminum ash of slag water logging being sent as an envoy to dissolves and enters in water, then carries out solid-liquid separation；Evaporation liquid phase obtains chloride crystallization, and solid phase is as raw material production aluminium oxide.
The a kind of of the present invention extracts aluminum and muriatic method in aluminum ash, it is characterised in that temperature when described heating aluminum ash melts metallic aluminium is 650-800 DEG C.
The a kind of of the present invention extracts aluminum and muriatic method in aluminum ash, it is characterised in that the extraction time of described slag water leaching process is 60-180min, leaches solid-liquid weight ratio and is: 1: 2-1: 20.
The a kind of of the present invention extracts aluminum and muriatic method in aluminum ash, it is characterised in that described evaporation liquid phase obtains the evaporating temperature of chloride crystallization and is 100-200 DEG C.
The method of the present invention processes aluminum ash, technological process is short, easy to operate, it is prone to industrial implementation, various valuable constituents in aluminum ash can be extracted, often processing one ton of aluminum recyclable about 85-255 kilogram aluminum liquid of ash, about 80-240 kilogram chloride and salic solid material, concrete yield is relevant with contained metallic aluminium and muriatic content in aluminum ash.The method comprehensive utilization value is high, the response rate is high, and in aluminum ash, the response rate of metallic aluminium is more than 85%, and chloride recovery rate is more than 80%.
Detailed description of the invention
Aluminum and muriatic method in a kind of extraction aluminum ash, its process includes: aluminum ash is heated to 650-800 DEG C, after being completely melt by the aluminum in aluminum ash and being layered with slag, aluminum liquid sucking-off is directly sent to casting, reclaims slag；The chloride in aluminum ash of slag water logging being sent as an envoy to dissolves and enters in water, then carries out solid-liquid separation, reclaims solid phase and liquid phase, extraction time 60-180min, and leaching solid-liquid weight ratio is 1: 2-1: 20；Liquid phase evaporative crystallization at 100-200 DEG C reclaims chloride, and solid phase is as the raw material producing aluminium oxide.
Below in conjunction with example, the method for the present invention is described further.
Embodiment 1
By 5000 grams containing metallic aluminium 20%, the aluminum ash of chloride 20% is heated to 650 DEG C, stirs in heating process, and after the aluminum in aluminum ash is completely melt and is layered with slag by the time, sucking-off aluminum liquid sends to casting, reclaims slag.Slag water logging goes out 180min, and leaching solid-liquid weight ratio is 1: 20, stirs in leaching process, makes the chloride in aluminum ash dissolve and enters in water, carry out solid-liquid separation, reclaims solid phase and liquid phase.Liquid phase is evaporative crystallization at 100 DEG C, reclaims chloride, and chloride composition is mainly sodium chloride, potassium chloride and magnesium chloride, can directly return casting process and be used as refining flux；Solid phase is the most salic and silicon dioxide, can be directly as raw material production aluminium oxide.Through to regenerant metering weigh-, reclaim metallic aluminium 860 grams, reclaim chloride 915 grams, reclaim salic solid material 3159 grams.
Embodiment 2
By 5000 grams containing metallic aluminium 11.5%, the aluminum ash of chloride 13.2% is heated to 800 DEG C, stirs in heating process, and after the aluminum in aluminum ash is completely melt and is layered with slag by the time, sucking-off aluminum liquid also sends to casting, reclaims slag.Slag water logging goes out 60min, and leaching solid-liquid weight ratio is to stir in 1: 2 leaching process, makes the chloride in aluminum ash dissolve and enters in water, carry out solid-liquid separation, reclaims solid phase and liquid phase.Liquid phase is evaporative crystallization at 150 DEG C, reclaims chloride, and chloride is mainly composed of sodium chloride, potassium chloride and magnesium chloride, can directly return casting process and be used as refining flux；Solid phase is the most salic and silicon dioxide, can be directly as raw material production aluminium oxide.Through to regenerant metering weigh-, reclaim metallic aluminium 529 grams, reclaim chloride 547 grams, reclaim salic solid material 3727 grams.
Embodiment 3
By 5000 grams containing metallic aluminium 25.7%, the aluminum ash of chloride 23.5% is heated to 750 DEG C, stirs in heating process, and after the aluminum in aluminum ash is completely melt and is layered with slag by the time, sucking-off aluminum liquid also sends to casting, reclaims slag.Slag water logging goes out 100min, and leaching solid-liquid weight ratio is to stir in 1: 10 leaching process, makes the chloride in aluminum ash dissolve and enters in water, carry out solid-liquid separation, reclaims solid phase and liquid phase.Liquid phase is evaporative crystallization at 120 DEG C, reclaims chloride, and chloride is mainly composed of sodium chloride, potassium chloride and magnesium chloride, can directly return casting process and be used as refining flux；Solid phase is the most salic and silicon dioxide, can be directly as raw material production aluminium oxide.Through to regenerant metering weigh-, reclaim metallic aluminium 1143 grams, reclaim chloride 1022 grams, reclaim salic solid material 2748 grams.
Claims (4)
1. one kind is extracted aluminum and muriatic method in aluminum ash, it is characterised in that its extraction process be the aluminum in aluminum ash is completely melt and is layered with slag by the heating of aluminum ash after, casting is directly sent in aluminum liquid sucking-off；The chloride in aluminum ash of slag water logging being sent as an envoy to dissolves and enters in water, then carries out solid-liquid separation；Evaporation liquid phase obtains chloride crystallization, and solid phase is as raw material production aluminium oxide.
Aluminum and muriatic method in a kind of extraction aluminum ash the most according to claim 1, it is characterised in that temperature when described heating aluminum ash melts metallic aluminium is 650-800 DEG C.
Aluminum and muriatic method in a kind of extraction aluminum ash the most according to claim 1, it is characterised in that the extraction time of described slag water leaching process is 60-180min, leach solid-liquid weight ratio and be: 1: 2-1: 20.
Aluminum and muriatic method in a kind of extraction aluminum ash the most according to claim 1, it is characterised in that described evaporation liquid phase obtains the evaporating temperature of chloride crystallization and is 100-200 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510351226.0A CN106319220A (en) | 2015-06-24 | 2015-06-24 | Method for extracting aluminum and chloride from aluminum ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510351226.0A CN106319220A (en) | 2015-06-24 | 2015-06-24 | Method for extracting aluminum and chloride from aluminum ash |
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| CN106319220A true CN106319220A (en) | 2017-01-11 |
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| CN201510351226.0A Pending CN106319220A (en) | 2015-06-24 | 2015-06-24 | Method for extracting aluminum and chloride from aluminum ash |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110935708A (en) * | 2018-09-25 | 2020-03-31 | 王雨轩 | Waste recovery treatment system and treatment method for aluminum alloy products |
| CN112605096A (en) * | 2020-11-27 | 2021-04-06 | 飞潮(上海)环境技术有限公司 | Method for circularly enriching soluble chloride solution |
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2015
- 2015-06-24 CN CN201510351226.0A patent/CN106319220A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110935708A (en) * | 2018-09-25 | 2020-03-31 | 王雨轩 | Waste recovery treatment system and treatment method for aluminum alloy products |
| CN110935708B (en) * | 2018-09-25 | 2023-08-22 | 王雨轩 | Waste recycling treatment system and treatment method for aluminum alloy products |
| CN112605096A (en) * | 2020-11-27 | 2021-04-06 | 飞潮(上海)环境技术有限公司 | Method for circularly enriching soluble chloride solution |
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Application publication date: 20170111 |