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Aluminum alloy smelting and impurity removing technology

A technology of aluminum alloy and technology, which is applied in the field of aluminum alloy casting, can solve problems such as difficult to meet the requirements of high-quality aluminum and aluminum alloy products, and achieve the effects of promoting floating flow, increasing surface tension, and good separation

Inactive Publication Date: 2016-07-20
贵州航天风华精密设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional dehydrogenation and deoxidation refining technologies are difficult to meet the requirements of high-quality aluminum and aluminum alloy products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The invention provides an aluminum alloy smelting and impurity removal technology, comprising the following steps:

[0016] 1) Weigh the aluminum alloy, cut it into pieces, put it into the smelting furnace, add 0.1% refining agent according to the amount, and pass through the protective gas to replace the air; the refining agent includes the following raw materials: potassium fluoroaluminate 10kg, CaF 2 5kg, LiCl12kg, calcium oxide 3kg, BAlF 3 30kg, K 2 SiF 6 5kg, silicon carbide 3kg;

[0017] 2) Heat the melting furnace to 660°C and keep it for 10 minutes, then add 0.05% of the total aluminum alloy surface covering agent; then raise the temperature to 740°C and keep it for more than 1 hour; the surface covering agent includes the following raw materials: K 2 CO 3 20kg, boron carbide 8kg, nano ceramics 12kg, aluminum oxide 12kg, C6Cl615kg, modified expanded perlite 10kg, sodium fluorosilicate 8kg;

[0018] 3) After the temperature drops to 600°C, pouring is carrie...

Embodiment 2

[0021] The invention provides an aluminum alloy smelting and impurity removal technology, comprising the following steps:

[0022] 1) Weigh the aluminum alloy, cut it into pieces, put it into the smelting furnace, add 0.3% refining agent according to the amount, and pass through the protective gas to replace the air; the refining agent includes the following raw materials: potassium fluoroaluminate 12kg, CaF 2 10kg, LiCl18kg, calcium oxide 5kg, BAlF 3 35kg, K 2 SiF 6 10kg, silicon carbide 5kg;

[0023] 2) Heating the smelting furnace to 670°C and keeping it for 10 minutes, then adding 0.05-0.1% of the total aluminum alloy surface covering agent; then raising the temperature to 750°C and keeping it for more than 1 hour; the surface covering agent includes the following raw materials: K 2 CO 3 25kg, boron carbide 16kg, nano ceramics 25kg, aluminum oxide 20kg, C 6 Cl 6 26kg, modified expanded perlite 30kg, sodium fluorosilicate 10kg;

[0024] 3) After the temperature drop...

Embodiment 3

[0027] The invention provides an aluminum alloy smelting and impurity removal technology, comprising the following steps:

[0028] 1) Weigh the aluminum alloy, cut it into pieces, put it into the smelting furnace, add 0.2% refining agent according to the amount, and pass through the protective gas to replace the air; the refining agent includes the following raw materials: potassium fluoroaluminate 11kg, CaF 2 7kg, LiCl16kg, calcium oxide 4kg, BAlF 3 33kg, K 2 SiF 6 8kg, silicon carbide 4kg;

[0029] 2) Heating the smelting furnace to 665°C and keeping it for 10 minutes, then adding 0.08% of the total aluminum alloy surface covering agent; then raising the temperature to 745°C and keeping it for more than 1 hour; the surface covering agent includes the following raw materials: K 2 CO 3 23kg, boron carbide 12kg, nano ceramics 18kg, aluminum oxide 17kg, C 6 Cl 6 20kg, modified expanded perlite 20kg, sodium fluorosilicate 9kg, lithium hydroxide 2kg;

[0030] 3) Pouring af...

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Abstract

The invention provides an aluminum alloy smelting and impurity removing technology and belongs to the technical field of aluminum alloy casting. The technology includes the following steps that firstly, aluminum alloy is weighed, diced and added into a smelting furnace, a 0.1-0.3% refining agent is added according to the amount, and protection gas is introduced for air replacement; secondly, the smelting furnace is heated to 660-670 DEG C, the temperature is kept for 10 min, then a surface covering agent accounting for 0.05-0.1% of the total amount of the aluminum alloy is added, and the temperature is raised to 740-750 DEG C and kept for 1 h or above; thirdly, the temperature is lowered to 600-650 DEG C and then pouring is conducted for 0.5-1 h. According to the technology, the refining agent and the surface covering agent are combined, the functions of deoxidization, gas removal, impurity removal and the like are integrated, and adsorption capacity, dissolving capacity and chemical slag forming capacity are high. The refining agent and the surface covering agent can increase surface tension between melts, floating and flowing of slag can be promoted so that the slag and molten aluminum can be better separated, and accordingly the effects of refining, impurity removing and melt purifying are achieved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy casting, in particular to an aluminum alloy smelting and impurity removal technology. Background technique [0002] Aluminum alloy has the advantages of low density, excellent thermal and electrical conductivity, and easy forming, so it is widely used. Aluminum alloy forming methods mainly include casting forming and deformation processing, among which casting forming is still a widely used forming method in modern aluminum alloy production. [0003] The traditional molding method mainly adopts die-casting molding, so that during the die-casting molding process, hydrogen molecules are spontaneously formed in the aluminum alloy solution, and bubbles or precipitated impurities formed by non-metallic inclusions affect the quality of the aluminum alloy. After the smelting of the aluminum alloy is completed, the aluminum alloy needs to be refined to reduce the impurities in the aluminum alloy. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C21/00
CPCC22C1/06C22C21/00
Inventor 李翔光王德细俞开升陈春喜于丹敖四海王昌明程国栋李伟梁益龙
Owner 贵州航天风华精密设备有限公司
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