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Leaching method for valuable elements in quadratic aluminum dust

A valuable element, secondary aluminum technology, applied in the field of comprehensive utilization of waste aluminum ash, can solve the problems of simple recovery method, cannot be recycled, not recycled, etc., achieves high leaching rate, realizes recycling, and reduces pollution.

Inactive Publication Date: 2015-11-11
苏州卡迪亚铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current domestic aluminum ash treatment is basically small workshops, the recycling methods are simple, and they are all open operations, which generate a lot of dust, fluoride salts generate a lot of smoke, and the pollution is serious. Although aluminum is recycled, alumina and other components such as fluoride salts are thrown away as waste and cannot be recycled
Therefore, the current domestic aluminum ash treatment technology is polluting the environment, not recycling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for leaching valuable elements in secondary aluminum ash, comprising the following steps:

[0018] (100) adding secondary aluminum ash to NaOH solution, and adding 12 g of secondary aluminum ash to every 100 ml of NaOH solution to form a mixture; wherein, the concentration of the NaOH solution is 1.5 mol / L;

[0019] (200) adding the above-mentioned mixture into a ball mill, and milling for 3-3.5 hours; wherein, the temperature during the ball milling is 80° C., the milling time is preferably 3 hours, and the ball milling speed of the ball mill is 125 r / min;

[0020] (300) Suction filtration, drying the filter residue in a vacuum drying oven to obtain reusable aluminum ash powder, the drying temperature is 110°C.

[0021] The valuable elements are Na, K, Cl and Si, and the leaching rates of the valuable elements Na, K, Cl and Si are: 83.6%, 78.3%, 97.4%, and 55.7%, respectively.

Embodiment 2

[0023] A method for leaching valuable elements in secondary aluminum ash, comprising the following steps:

[0024] (100) Add secondary aluminum ash to NaOH solution, and add 12.5 g of secondary aluminum ash to every 100 ml of NaOH solution to form a mixture; wherein, the concentration of the NaOH solution is 1.5 mol / L;

[0025] (200) adding the above-mentioned mixture into a ball mill, and milling for 3-3.5 hours; wherein, the temperature during the ball milling is 75° C., the milling time is preferably 3 hours, and the ball milling speed of the ball mill is 150 r / min;

[0026] (300) Suction filtration, drying the filter residue in a vacuum drying oven to obtain reusable aluminum ash powder, the drying temperature is 105°C.

[0027] The valuable elements are Na, K, Cl and Si, and the leaching rates of the valuable elements Na, K, Cl and Si are: 85.4%, 79.6%, 93.9%, and 55.7%, respectively.

Embodiment 3

[0029] A method for leaching valuable elements in secondary aluminum ash, comprising the following steps:

[0030] (100) Add secondary aluminum ash to NaOH solution, and add 11.5 g of secondary aluminum ash to every 100 ml of NaOH solution to form a mixture; wherein, the concentration of the NaOH solution is 1.5 mol / L;

[0031] (200) adding the above-mentioned mixture into a ball mill, and milling for 3-3.5 hours; wherein, the temperature during the ball milling is 77°C, the milling time is preferably 3 hours, and the ball milling speed of the ball mill is 135r / min;

[0032] (300) Suction filtration, drying the filter residue in a vacuum drying oven to obtain reusable aluminum ash powder, the drying temperature is 115°C.

[0033] The valuable elements are Na, K, Cl and Si, and the leaching rates of the valuable elements Na, K, Cl and Si are: 86.7%, 79.2%, 96.5%, and 55.7%, respectively.

[0034] The invention discloses a method for leaching valuable elements in secondary alum...

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PUM

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Abstract

The invention discloses a leaching method for valuable elements in quadratic aluminum dust. The leaching method includes the following steps that (100) the quadratic aluminum dust is added into a NaOH solution, and 11-13 g of the quadratic aluminum dust is added into every 100 ml of the NaOH solution, so that mixed materials are formed; (200) the mixed materials are added into a ball grinder to be subjected to ball grinding for 3-3.5 hours; and (300) suction filtration is carried out. Particularly, filter residues are dried in a vacuum drying oven, and aluminum dust capable of being reused is obtained. In this way, the leaching method for the valuable elements in the quadratic aluminum dust not only can reduce environmental pollution and realize recycling of the quadratic aluminum dust, but also is easy to operate, saves raw materials, reduces the cost, is environmentally friendly, and saves energy.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of waste aluminum ash, in particular to a method for leaching valuable elements in secondary aluminum ash. Background technique [0002] In addition to aluminum, the secondary aluminum ash also contains Al 2 o 3 , fluoride salts, CaO and SiO 2 And other substances, the aluminum in aluminum ash can be recycled. At present, the recycling of aluminum ash mainly adopts methods such as adding separating agent, manual sorting, crushing, melting and casting, and the recovery rate is generally about 70%. The secondary aluminum ash produced is mainly used to produce water purifiers, refractory materials, corundum, road materials, etc. [0003] If other components in the secondary aluminum ash can be leached, utilized to the greatest extent, and prepared into new materials with high added value, the recycling of aluminum ash can be realized. However, the current domestic aluminum ash t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B26/10C01B33/12
CPCY02P10/20Y02P20/10
Inventor 吴志强
Owner 苏州卡迪亚铝业有限公司
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