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Alkaline stemming

A blast furnace clay and alkaline technology, which is applied in the field of blast furnace taphole alkaline blast clay, can solve the problems of unfavorable environmental influence and difficulty in adapting to the requirements of the furnace, and achieve the reduction of harmful impurities, easy opening of holes, and short sintering time Effect

Active Publication Date: 2015-07-08
通化耐博新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bauxite is mostly used as raw material for traditional gun clay. With the increase of raw material cost, it is difficult to meet the increasingly stringent furnace requirements. Use under high temperature conditions will produce some toxic and harmful substances, which will have adverse effects on the environment

Method used

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  • Alkaline stemming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1 A kind of alkaline gun clay is made from the following raw materials in terms of weight percentage:

[0026] Sintered magnesia (particle size ≤ 5mm, MgO content ≥ 90%) 30%, coke foam 15%, andalusite (particle size ≤ 1mm, Al 2 o 3 content ≥ 55%) 5%, magnesium carbon recycled material 12%, carbon resin powder (CARBORES?P, 200 mesh) 3%, silicon carbide (200 mesh) 10%, Jiaozuo clay (200 mesh) 5%, light burning Magnesium powder 10%, α-alumina 5%, andalusite powder 5%, and 15% of the total weight of the above raw materials plus special resin for gun clay (CARBORES ? T60);

[0027] Take sintered magnesia, andalusite, magnesia-carbon recycled materials, carbon-containing resin powder, silicon carbide, coke clay, lightly burned magnesium powder, α-alumina, and andalusite powder in a wet mill according to the weight ratio Mix for 4 minutes, then add resin and mix and grind for 25 minutes, so that the resin is fully soaked into the mixed powder, has a certain degr...

Embodiment 2

[0029] Embodiment 2 A kind of alkaline gun clay is made from the following raw materials in terms of weight percentage:

[0030] Sintered magnesia (particle size ≤ 5mm, MgO content ≥ 90%) 35%, coke foam 10%, andalusite (particle size ≤ 1mm, Al 2 o 3 content ≥55%) 10%, magnesium carbon recycled material 15%, carbon resin powder (CARBORES?P, 200 mesh) 2%, silicon carbide (250 mesh) 8%, Jiaozuo clay (250 mesh) 6%, light burning 10% magnesium powder, 4% α-alumina, and 17% of the total weight of the above raw materials plus resin (CARBORES ? T60);

[0031] The preparation method of the above-mentioned gun clay is the same as the conventional method.

Embodiment 3

[0032] Embodiment 3 A kind of alkaline gun clay is made from the following raw materials in weight percentage:

[0033] Sintered magnesia (particle size ≤ 5mm, MgO content ≥ 90%) 25%, coke foam 15%, andalusite (particle size ≤ 1mm, Al 2 o 3 content ≥ 55%) 8%, magnesium carbon recycled materials 24%, carbon resin powder (CARBORES?P, 200 mesh) 4%, silicon carbide (250 mesh) 5%, Jiaozuo clay (250 mesh) 5%, light burning 10% magnesium powder, 4% α-alumina, and 18% of the total weight of the above raw materials plus resin (CARBORES ? T60).

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Abstract

The invention relates to alkaline stemming which is prepared from the following raw materials: 25%-50% of sintered magnesia, 5%-20% of dust coke, 10%-25% of magnesium-carbon reclaimed material, 1%-10% of carbon-containing resin powder, 5%-10% of silicon carbide, 5%-10% of Jiaozuo clay, 1%-5% of alpha aluminum oxide, 5%-20% of light burning magnesium powder, 5%-10% of andalusite, and stemming-dedicated resin accounting for 10%-20% of the total weight of the raw materials. The alkaline stemming provided by the invention has the advantages of good plasticity and adhesion, appropriate porosity, slight volume expansion at high temperature, good sintering property, high strength, scouring resistance, erosion resistance, easiness in tapping and environmental friendliness, and does not discharge pollutant gas in the sintering process; the molten iron scouring resistance of the alkaline material is fully played, and the alkaline stemming does not bring pollution or harmful impurities to molten iron; the harmful impurities in the molten iron can be reduced to purify the molten iron; the harmful components such as phosphorus, sulfur and silicon in the molten iron are reduced; the alkaline stemming provided by the invention has the advantages of long service life, short sintering time, high strength and easiness in tapping, reduces the maintenance cost of an iron notch and is conducive to the stable operation and stable and high yield of a blast furnace.

Description

technical field [0001] The invention relates to the field of metallurgical refractory materials, in particular to an alkaline gun mud for a blast furnace taphole. Background technique [0002] In recent years, blast furnaces with different volumes have sprung up like mushrooms after rain, competing to adopt new technologies such as high wind pressure, high top pressure, high smelting strength, large air volume, and oxygen-enriched large injection. With the improvement of blast furnace equipment and smelting process, the utilization factor of blast furnace has been improved, the number of tapping times has increased, the tapping time has increased, and the amount of tapping has increased, which puts forward higher requirements for the quality of blast furnace taphole clay. The function of taphole mud is to fill up the taphole channel and form a mud bag in the hearth to maintain a sufficient depth of the taphole; at the same time, it should be easy to open and muddy, so as t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 邵建秋魏宇珩李跃普高义张大志陈洪伟
Owner 通化耐博新材料股份有限公司
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