Auxiliary agent for reducing low temperature reduction index of sintering ore

A sintered ore, low temperature technology, applied in the field of metallurgy, can solve problems such as the corrosion effect of calcium chloride, and achieve the effects of significant use effect, lower low temperature reduction and pulverization index, and simple use.

Inactive Publication Date: 2008-03-19
LAIWU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention mainly solves the problems of corrosion caused by the original spraying of calcium chloride and low effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The auxiliary agent for reducing the low-temperature reduction index of sintered ore has the following chemical composition and weight percentage: 4% boric acid, 40% calcium chloride, 30% calcium nitrate, 25% magnesium sulfate, and 1% fatty alcohol polyoxyethylene ether.

Embodiment 2

[0029] The auxiliary agent for reducing the low-temperature reduction index of sintered ore has the following chemical composition and weight percentage: 4.9% boric acid, 30% calcium chloride, 40% calcium nitrate, 25% magnesium sulfate, and 0.1% fatty alcohol polyoxyethylene ether.

Embodiment 3

[0031] The auxiliary agent for reducing the low-temperature reduction index of the sintered ore has the following chemical composition and weight percentage: 4.5% boric acid, 40% calcium chloride, 35% calcium nitrate, 25% magnesium sulfate, and 0.5% fatty alcohol polyoxyethylene ether.

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Abstract

The present invention relates to the manufacture and an application method for auxiliary agent which can reduces the low temperature reducibility index of sintered ore. With the weight percentage ratio, the auxiliary agent has the chemical formula that boric acid is 3-5 percent, calcium chloride is 30-40 percent, calcium nitrate is 30-40 percent, magnesium sulfate is 25-30 percent, and fatty alcohol polyoxyethylene ether is 1-10 percent; the chemical agent with suitable content and granularity is evenly mixed, and is packed and sealed into bags with 25 kg per bag. The prepared auxiliary agent is completely dissolved with water of 3 percent content, and the prepared solution is sprayed to the sintered ore with 3.4 kg/ton content. The present invention provides the preparation and the application method of the chemical agent suitable for reducing the low temperature reduction and the pulverization of the sintered ore with simple formula, remarkable effect, low cost, and simple application method, and by adopting the auxiliary agent, the low temperature reduction and pulverization indexes of the sintered ore can be effectively reduced by about RDI + 3.15 mm 10 percent.

Description

technical field [0001] The invention relates to the technical field of metallurgy and belongs to the sintering category. It is a preparation and application method of an auxiliary agent for reducing the pulverization index of sintered ore at low temperature reduction. Background technique [0002] The low-temperature reduction pulverization index of sinter is a metallurgical performance index reflecting the fragmentation degree of the ironmaking charge during the low-temperature reduction process in the upper and middle parts of the blast furnace, and is one of the important factors affecting the production of the blast furnace. If the low-temperature reduction index is too high, the air permeability of the material column in the blast furnace will deteriorate, the output will decrease, and the coke ratio will increase. Therefore, reducing the pulverization index of sinter at low temperature reduction is of great significance for increasing production and reducing consumpti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16
Inventor 李志峰种振宇李艳青孙业新闫志华杨军李强
Owner LAIWU IRON & STEEL GRP
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