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Zinc slag reducing agent

A technology of slag reducing agent and total quality, applied in the field of zinc slag reducing agent, can solve the problems of irritating fluorine and chlorine, large smoke and dust, etc., achieve good slagging performance, improve product quality, and good environmental protection and safety effects

Active Publication Date: 2014-03-05
湖南株冶环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention solves the technical problems that the slagging agent used in the prior art has large smoke and dust, produces pungent odor and contains a large amount of fluorine and chlorine, and provides a new type of zinc slag reducing agent, which can make zinc liquid, zinc The base alloy liquid is fully slag-removed and purified, improving its product quality, and at the same time conducive to safety and environmental protection and the recyclability of zinc slag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The zinc slag reducing agent S1 of this embodiment is prepared according to the following composition: charcoal powder: 30wt%; sodium nitrate: 10wt%; potassium nitrate: 10wt%; silicon dioxide: 30wt%; calcium carbonate: 10wt%; sodium carbonate: 10wt% .

[0026] Zinc alloys are produced in a coreless induction furnace. When the furnace temperature is about 600°C, the zinc slag reducing agent S1 is used for slagging treatment of zinc alloys. During the slagging process, there is no or less smoke and no irritating odor. The amount of zinc slag reducing agent added is 0.05wt% of the total amount of zinc alloy added to the centerless induction furnace. After slagging treatment, the amount of zinc slag produced by producing 1 ton of zinc alloy is 12 kg, and the direct recovery rate is 98.8%. Ingot, the surface of the ingot is bright without slag inclusion, and the zinc slag produced does not contain fluorine and chlorine.

Embodiment 2

[0028] The zinc slag reducing agent S2 of this embodiment is prepared according to the following composition: charcoal powder: 30wt%; sodium nitrate: 15wt%; potassium nitrate: 5wt%; silicon dioxide: 25wt%; calcium carbonate: 15wt%; sodium carbonate: 10wt% .

[0029] In the production of zinc alloy in a cored induction furnace, when the furnace temperature is about 500°C, use the zinc slag reducing agent S2 to carry out slagging treatment on the zinc alloy liquid. During the slagging process, there is no or less smoke and no irritating smell. produce. The amount of zinc slag reducing agent added is 0.12wt% of the total amount of zinc alloy added to the cored induction furnace. After slagging treatment, the production of 1 ton of zinc alloy produces 18 kg of zinc slag, and the direct recovery rate is 98.2%. Casting into ingots, the surface of the ingots is bright without slag inclusions, and the zinc slag produced does not contain fluorine and chlorine.

Embodiment 3

[0031] The zinc slag reducing agent S3 of this embodiment is prepared according to the following composition: charcoal powder: 20wt%; sodium nitrate: 10wt%; potassium nitrate: 10wt%; silicon dioxide: 30wt%; calcium carbonate: 20wt%; sodium carbonate: 10wt% .

[0032] In a hot-dip galvanizing pot with a capacity of 300 tons, when the temperature of the hot-dip galvanizing alloy solution is 450°C, the zinc slag reducing agent S3 is used for slagging treatment. There is no or less smoke and no irritation during the slagging process. Odor produced. The amount of zinc slag reducing agent added is 0.1wt% of the total amount of hot-dip galvanized alloy in the hot-dip galvanizing pot. After the slagging treatment, the zinc particles contained in the zinc scum are significantly reduced, and the generated zinc slag does not contain fluorine and chlorine, and the floating The total amount of slag is reduced by one-third compared with the prior art, the surface of the galvanized layer is...

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PUM

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Abstract

The invention provides a zinc slag reducing agent. Based on the total weight of the zinc slag reducing agent, the zinc slag reducing agent comprises the following components in percentage by weight: 20 to 30 percent of charcoal powder, 10 to 20 parts of sodium nitrate, 5 to 10 percent of potassium nitrate, 20 to 30 percent of silicon dioxide, 10 to 20 percent of calcium carbonate and 10 to 20 percent of sodium carbonate. The zinc slag reducing agent provided by the invention is applicable to a zinc alloy slagging process for casting various components. After the zinc slag reducing agent is used, zinc slag entrained metal particle zinc is reduced, zinc slag is reduced, the one-time direct yield is increased, harmful impurity fluorine chlorine is avoided, and the zinc slag can directly enter a zinc hydrometallurgy system to be treated.

Description

technical field [0001] The invention relates to a zinc slag reducing agent, which is used in the technical field of slag removal for zinc and zinc-based alloy melting and casting and metal liquid slag removal and purification when the zinc-based alloy is used. Background technique [0002] Domestic zinc and zinc-based alloy production ingots and zinc alloys produce large oxidation, and the presence of oxides in the zinc liquid seriously affects the quality of zinc ingots and zinc alloy products; when the surface oxide slag is salvaged during casting products, it will cause a large amount of harmful Valuable metals are wasted, thereby causing the shortcoming of low metal direct recovery rate. Although the existing slag reducing agent (also known as slagging agent or slagging agent) products can improve the above defects to a certain extent, there are environmental protection defects, such as large smoke and dust, pungent odor, and a large amount of fluorine and chlorine. Def...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/10C22B19/32C22C1/06
CPCY02P10/20
Inventor 张伟陈顺李正明张德晶匡立春朱北平陈军辉徐军
Owner 湖南株冶环保科技有限公司
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