Nuisanceless powder injection refining flux

A refining agent and powder spraying technology, applied in the field of casting flux, can solve the problems of environmental pollution, endangering the health of operators, corroding equipment and tools, etc.

Inactive Publication Date: 2011-07-20
镇江市丹徒区振华熔剂厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of such powder spraying refining agent firstly endangers the health and even life of operators; secondly, it severely cor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1 is characterized in that the component formula weight percent of pollution-free dusting refining agent is:

[0013] Sodium fluorosilicate Na 2 SiF 6 25%; Sodium Sulfate (Yuanmingfen) Na 2 SO 4 5% sodium nitrate Na 2 NO 3 15%; calcium fluoride (fluorite) CaF 2 5%; Potassium chloride KCl 25%; Add sodium chloride NaCl to the rest to 100%.

[0014] Its preparation method is to put the component raw materials to be prepared into stainless steel containers respectively, and then put them into an oven for drying; after taking them out, they are weighed and ball milled to reach the required particle size; finally, they are packed by mechanical mixing, that is, for the finished product.

Embodiment 2

[0015] Embodiment 2 is characterized in that the component formula weight percent of pollution-free dusting refining agent is:

[0016] Sodium fluorosilicate Na 2 SiF 6 15%; sodium sulfate (yuanmingfen) Na 2 SO 4 15%; sodium nitrate Na 2 NO 3 5%; calcium fluoride (fluorite) CaF 2 15%; Potassium chloride KCl 15%; Add sodium chloride NaCl to the rest to 100%.

[0017] Its preparation method is as described in Example 1.

Embodiment 3

[0018] Embodiment 3 is characterized in that the component formula weight percent of pollution-free dusting refining agent is:

[0019] Sodium fluorosilicate Na 2 SiF 6 22%; sodium sulfate (yuanmingfen) Na 2 SO 4 8%; sodium nitrate Na 2 NO 3 12%; calcium fluoride (fluorite) CaF 2 8%; Potassium chloride KCl 22%; Add sodium chloride NaCl to the rest to 100%.

[0020] Its preparation method is as described in Example 1.

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PUM

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Abstract

The invention relates to a nuisanceless powder injection refining flux belonging to a flux for casting. Aiming at the problem that a hexachloroethane powder injection refining flux inevitably generates toxic chlorine gas and fluorine gas which are harmful to the health of an operator, etch equipment and tools and cause serious pollution to the environment to generate public hazards. The nuisanceless powder injection refining flux is characterized by comprising the following components in percent by weight: 15-25 percent of Na2SiF6, 5-15 percent of Na2SO4, 5-15 percent of Na2NO3, 5-15 percent of CaF2, 15-25 percent of KCl and the balance of NaCl added to 100 percent. The NaCl and the KCl are combined to achieve favorable spread performance, coverage and separability; the Na2SiF6 produces non-toxic and volatile SiF4 and AlF3 and SiO2 with good slagging performance; a large quantity of hydrogen and other impurities can be taken out in the floating process of a fusant; the CaF2 promotes slag bodies to flow, and the Na2NO3 enables the fusant to raise the temperature partially, and a small quantity of molten aluminum or aluminum alloy doped in slag is dropped back to the fusant. On trial, the nuisanceless powder injection refining flux shows a favorable refining effect and has the beneficial effect of no toxicity or public hazards.

Description

technical field [0001] The invention belongs to the technical field of casting flux, in particular to a pollution-free powder-spraying refining agent for refining aluminum or aluminum alloy melts. Background technique [0002] Refining and modification are essential processes in the smelting process of aluminum or aluminum alloy. In the past, hexachloroethane refining and fluorine salt modification processes have been used, among which hexachloroethane powder spraying refining agent is more commonly used. Hexachloroethane is the most toxic of chlorinated hydrocarbons. It has an anesthetic effect on the central nervous system of humans and animals, damages the liver and kidneys, and slightly stimulates the skin and mucous membranes. Dizziness, vomiting, liver pain, increased blood bilirubin, slow heart rate, nephritis and anuria. The refining process using hexachloroethane powder spraying refining agent will inevitably produce gases mainly composed of chlorine and fluorine....

Claims

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Application Information

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IPC IPC(8): C22B9/10C22B21/06C22C1/06C22C21/00
Inventor 周建
Owner 镇江市丹徒区振华熔剂厂
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