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Dosage for producing micro crystal glass or cast stone from iron containing metallurgical waste slag and its method

A technology for metallurgical waste slag and glass-ceramic, which is applied in the field of recycling and smelting of iron-containing metallurgical waste slag, can solve the problems of insufficient utilization, environmental pollution, waste of resources, etc., and achieve the effects of good strength, uniform texture and saving processing costs.

Inactive Publication Date: 2005-10-19
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

If it is used alone to recover iron by smelting, it is not economically cost-effective, and it can only be discarded or used in the cement industry, resulting in waste of resources, or can not be fully utilized, and a large amount of waste residues accumulate to cause environmental pollution

Method used

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Embodiment Construction

[0012] The low nickel matte slag produced by the flash furnace for smelting nickel metal has an iron content of 40%. 45% by weight of low-matte nickel slag is used as the main material, and the batch material is composed of 10-25% of quartz sand, 5-15% of limestone, 5-15% of bauxite, and the reducing agent is 5-10% of For silicon carbide, the crystal nucleating agent is composed of 1-1.5% sodium sulfate and 1-2% fluorite, and the degassing agent is composed of 1-1.5% sodium sulfate.

[0013] The reducing agent can also be 5-15% ferrosilicon, or 5-10% ferro-titanium, or 5-10% calcium-silicon alloy, or 5-10% aluminum.

[0014] The crystal nucleating agent can also use 1-2% titanium dioxide, or 1-1.5% Cr 2 o 3 .

[0015] The degassing agent can also use 1-1.5% fluorite, or 1% sodium carbonate, or 1% white arsenic, or 1-2% antimony oxide, or 1-2% sodium nitrate.

[0016] After smelting in an electric furnace (or fuel kiln) for 35 minutes at a temperature of 1500°C and holding ...

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Abstract

The present invention relates to material composition and method of producing microcrystalline glass or cast stone with iron containing metallurgical slag, relates to the method of recovering and melting metallurgical slag, and aims at recovering iron containing slag, utilizing its iron in melting cast iron or steel, melting the slag into microcrystalline glass or cast stone, raising resource utilization rate and lowering environmental pollution. The iron containing metallurgical slag used as main material accounts for 45-65 wt%; and the supplementary material accounts 44-55 wt%. The supplementary material includes compounded material, reductant, crystal kernel agent and deairing agent; and the compounded material consists of quartzite, limestone and bauxite, or consists of coal gangue and cinder.

Description

technical field [0001] The invention relates to a method for recycling and smelting iron-containing metallurgical waste slag. Background technique [0002] At present, some waste slags of non-ferrous metallurgy and ferrous metallurgy in my country contain a large amount of iron, such as steel slag often containing 20-30% iron, and low-matte slag containing about 40% iron. If it is used alone to recover iron by smelting, it is economically uneconomical. It can only be discarded or used in the cement industry, resulting in a waste of resources, or it cannot be fully utilized, and a large amount of waste residues accumulates to cause environmental pollution. Contents of the invention [0003] The purpose of the present invention is to recover the iron-containing waste slag in the smelting industry, reduce and smelt the iron in it into cast iron or steel, and melt the slag into glass-ceramic or cast stone at the same time, so as to improve resource utilization and reduce envir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B32/02C03C10/00C03C10/04C03C10/08
CPCC03C10/0063
Inventor 傅希圣任虎平周琪南雪丽
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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