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Refining agent for aluminum and aluminum alloy

A refining agent and aluminum alloy technology, which is applied in the field of metallurgy, can solve the problems of corrosion of electrolytic cells and aluminum ash cannot be returned to the cell, and achieve the effects of strong adhesion, good refining effect, and convenient equipment

Active Publication Date: 2011-02-09
江西广恒铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of potassium-free refining agent, which is applied to the refining of aluminum and aluminum alloys and the utilization of aluminum ash back to the trough, so as to solve the problem of aluminum ash produced by existing refining agents after refining and purifying aluminum and aluminum alloys due to containing Potassium causes severe corrosion of the electrolytic cell, resulting in the problem that the aluminum ash cannot be returned to the cell for utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh NaCl by mass percentage: 54.5%, NaCl 2 SiF 6 : 20%, Na 2 SO 4 : 5%, CaF 2 : 20%, C 6 Cl 6 : 0.5%, the above several materials are mixed, stirred evenly, put into a crucible to overheat and melt to remove the crystal water, then keep warm for 40 minutes, and process it into a refining agent after cooling.

Embodiment 2

[0021] Weigh NaCl by mass percentage: 30%, NaCl 2 SiF 6 : 30%, Na 2 SO 4 : 20%, CaF 2 : 19%, C 6 Cl 6 : 1%, the above several materials are mixed, stirred evenly, put into a crucible and overheated to melt to remove crystal water, then keep warm for 45 minutes, and process it into a refining agent after cooling.

Embodiment 3

[0023] Weigh NaCl by mass percentage: 40%, Na 2 SiF 6 : 15%, Na2 SO 4 : 30%, CaF 2 : 12%, C 6 Cl 6 : 3%, the above several materials are mixed, stirred evenly, put into a crucible to overheat and melt to remove the crystal water, then keep warm for 50 minutes, and process it into a refining agent after cooling.

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PUM

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Abstract

The invention relates to a refining agent for aluminum and aluminum alloy. The refining agent is characterized by mainly comprising the following components in percentage by mass: 30 to 85 percent of NaCl, 5 to 40 percent of Na2SiF6, 5 to 40 percent of Na2SO4, 2 to 20 percent of CaF2 and 0.5 to 5 percent of C6C16; and the refining agent also can comprise one or more of CaMg(CO3)2, Na3AlF6, Na2S2O3 and NaF. The potassium-free refining agent provided by the invention has good slag forming performance, strong gas and impurity removing capability and low cost; and the aluminum ash produced by refining the aluminum and the aluminum alloy through the refining agent can realize recycle.

Description

1. Technical field [0001] The invention belongs to the field of metallurgy and relates to a refining agent for aluminum and aluminum alloys, in particular to a refining agent for purifying aluminum melts. 2. Background technology [0002] Aluminum liquid or aluminum alloy liquid will inevitably absorb and carry gas and produce inclusions during electrolysis, smelting and transfer, which will reduce the purity of aluminum liquid or aluminum alloy liquid and affect the quality. Therefore, it is necessary to refine and purify aluminum liquid and aluminum alloy liquid to remove these gases and inclusions, improve the quality of aluminum liquid or aluminum alloy liquid, and add refining agent to aluminum liquid or aluminum alloy liquid for refining and purification treatment is a commonly used measure. Some wastes will be produced during the refining process, commonly known as "aluminum ash", and more than 80% of the aluminum ash is metallic aluminum and alumina. At present, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B21/06C22B9/10C22C1/06
CPCY02P10/20
Inventor 张煜赵斌南敬叶灵熊自强
Owner 江西广恒铝业有限公司
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