Method for processing and manufacturing aluminum ingot by utilizing and recovering waste aluminum powder

A technology for waste aluminum powder and aluminum ingots, applied in the direction of improving process efficiency, can solve the problems of difficult purification and production of aluminum ingots, pollution of oil and other sundries, unclear components, etc., to improve the metal melting rate and save fuel use. , the effect of improving the metal recovery rate

Inactive Publication Date: 2018-04-10
安徽玉成光华铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Recycled waste aluminum powder is often mixed with different alloys for various reasons, the composition is unclear, or it is polluted by oil and other sundries, which makes the purification and production of aluminum ingots very difficult.

Method used

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  • Method for processing and manufacturing aluminum ingot by utilizing and recovering waste aluminum powder

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Effect test

Embodiment 1

[0017] A method for processing aluminum ingots by recycling waste aluminum powder, comprising the following steps:

[0018] (1) First, use permanent magnets to recover the impurity iron in the waste aluminum powder, use a mesh screen with a particle size of 6 mm beyond the aluminum chips to sieve out the dust and sand in the remaining components, and pour the screened aluminum powder into the cleaning machine. In the cleaning tank of the cleaning agent, the temperature of the cleaning liquid is 45 °C, and the aluminum powder is 20 cm long, and the stirring rod is inserted into the bottom for stirring, and the suspended impurities are continuously floated out during the stirring process;

[0019] (2) After stirring and cleaning until there are no suspended impurities, filter, dry in an oven at 200°C, turn over every half hour, dry for 3 hours, and then use a press to press into a compressed aluminum cake with a thickness of 3 cm for smelting. Prepare the furnace before smelting...

Embodiment 2

[0026] A method for processing aluminum ingots by recycling waste aluminum powder, comprising the following steps:

[0027] (1) First, use permanent magnets to recover the impurity iron in the waste aluminum powder, use a mesh screen that exceeds the particle size of aluminum scraps by 7 mm to sieve out the dust and sand in the remaining components, and pour the screened aluminum powder into the cleaning machine. In the cleaning tank of the cleaning agent, the temperature of the cleaning liquid is 50 °C, and the aluminum powder is 25 cm long, and the stirring rod is inserted into the bottom for stirring, and the suspended impurities are continuously floated out during the stirring process;

[0028] (2) After stirring and cleaning until there are no suspended impurities, filter, dry in an oven at 210°C, stir once every half hour, dry for 3.5 hours, and then use a press to press into a compressed aluminum cake with a thickness of 4 cm for smelting. Prepare the furnace before sme...

Embodiment 3

[0035] A method for processing aluminum ingots by recycling waste aluminum powder, comprising the following steps:

[0036] (1) First, use permanent magnets to recover the impurity iron in the waste aluminum powder, use a mesh screen with a particle size of 8 mm beyond the aluminum chips to sieve out the dust and sand in the remaining components, and pour the screened aluminum powder into the cleaning machine. In the cleaning tank of the cleaning agent, the temperature of the cleaning liquid is 55 ° C, and the aluminum powder is 30 cm long, and the stirring rod is inserted into the bottom for stirring, and the suspended impurities are continuously floated out during the stirring process;

[0037] (2) After stirring and cleaning until there are no suspended impurities, filter, dry in an oven at 220°C, stir once every half hour, dry for 4 hours, and then use a press to press into a compressed aluminum cake with a thickness of 5 cm for melting. Prepare the furnace before smelting...

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Abstract

The invention relates to the technical field of waste aluminum recovery and utilization and discloses a method for processing and manufacturing aluminum ingot by utilizing and recovering waste aluminum powder. According to the method, the waste aluminum powder and the like are melted again, in the melting process, degassing, deslagging, modifying and refining are carried out, finally casting is carried out, the ingot is formed, the influence of technological parameters like the waste aluminum powder melting time, the refining temperature, the casting speed, the flux ratio and the flux additionamount to quality of the regenerated aluminum ingot is studied, the set technological parameters enable the gas content and the impurity content in a melted aluminum alloy to be minimum, different fluxes are added according to the different purification effects on melt by the fluxes, a covering agent and a refining agent are used, melting impurity can be improved to increase the metal recovery rate, and the metal melting rate can be increased to save fuel and reduce the burning loss. The method solves the problems of some defects like pin holes, looseness, inclusion and air holes occurring inand on the surface of the regenerated aluminum ingot.

Description

technical field [0001] The invention belongs to the technical field of waste aluminum recycling, and in particular relates to a method for processing aluminum ingots by using recycled waste aluminum powder. Background technique [0002] The status and role of aluminum and its alloys in the national economy are second only to steel, and their usage and scope are expanding day by day. Primary aluminum can no longer meet the needs of the society. On the one hand, bauxite is increasingly depleted, and on the other hand, aluminum smelting consumes a lot of energy, which aggravates the energy crisis. Therefore, it is particularly important to effectively recycle and utilize various waste materials and use scrapped parts in the aluminum processing industry. Scrap aluminum is a metal with high recovery and utilization value. First of all, aluminum is a third resource. It consumes a lot of energy in the process of smelting aluminum. The current average DC power consumption of electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B21/00C22B21/06C22B9/10
CPCC22B7/001C22B9/10C22B21/0007C22B21/0092C22B21/062Y02P10/20
Inventor 何启华
Owner 安徽玉成光华铝业有限公司
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