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Blast furnace waterless stemming

An anhydrous taphole clay and blast furnace technology, applied in the field of blast furnace anhydrous taphole clay, can solve the problems of poor high temperature resistant slag iron scouring and erosion performance, insufficient slag resistance performance, poor opening, etc., to ensure the scour resistance performance, eliminate the Large splash situation, the effect of eliminating large splash

Inactive Publication Date: 2012-10-10
BAOSTEEL GROUP XINJIANG BAYI IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the anhydrous taphole mud used in blast furnaces mainly has problems such as insufficient slag resistance, poor opening, easy iron breakage, poor erosion and erosion resistance of high temperature slag iron, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: Air volume ≥ 4300M 3 Clay used; wind pressure 330KPa; top pressure 190KPa; cement-free ratio when the utilization coefficient is 2.4: the blast clay is composed of the following components by mass percentage: 9.5% of CDQ dedusting ash with a particle size of 0-1mm, 180 mesh clay 9 %, 180 mesh sericite 5%, 200 mesh silicon carbide 18%, 0-1mm brown corundum or dense corundum 16.5%, 1-3mm brown corundum or dense corundum 15%, 200 mesh silicon nitride 3%, 2μm Aluminum powder 4%, the water content of each component is less than 0.5%. When this embodiment is in use, it can be equipped with 110 o 0.5% of high-temperature asphalt above C, and 15% of tar, all are percentages by weight. The plasticity value of the configured clay is 950-1050.

Embodiment 2

[0014] Example 2: Air volume 2500-4000M 3 Clay used; wind pressure 300KPa; top pressure 180KPa; cement-free ratio when the utilization coefficient is 2.0: the blast clay is composed of the following mass percentages: 10% CDQ dedusting ash with a particle size of 0-1mm, 10% clay of 180 mesh %, 180-mesh sericite 5%, 200-mesh silicon carbide 20%, 0-1mm brown corundum or dense corundum 17%, 1-3mm brown corundum or dense corundum 19%, 200-mesh silicon nitride 4%, 2μm Aluminum powder 5%, the water content of each component is less than 0.5%. When this embodiment is in use, it can be equipped with 110 o 0.5% of high-temperature asphalt above C, and 14% of tar, all are percentages by weight. The plasticity value of the configured clay is 950-1050.

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PUM

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Abstract

The invention discloses a blast furnace waterless stemming, composed of the following components by weight: 9.5-10% of dry quenching dedusting ash with a 0-1 mm size fraction, 9-10% of 180-mesh clay, 5% of 180-mesh sericite, 18-20% of 200-mesh silicon carbide, 16.5-17% of 0-1 mm brown corundum or dense corundum, 15-19% of 1-3 mm brown corundum or dense corundum, 3-4% of 200-mesh silicon nitride and 4-5% of 2 [mu]m aluminium micro-powder, with water content of each component lower than 0.5%. The blast furnace waterless stemming greatly enhances slag resistance of the waterless stemming, raises the volume density of the stemming and is capable of completely eliminating large splashing after opening.

Description

technical field [0001] The invention relates to an anhydrous blast furnace mud. Background technique [0002] The blast furnace taphole is the throat of molten iron discharged from the blast furnace. Due to the enlargement of the blast furnace and the application of intensified smelting technology, the number of tapping times has increased, so its process conditions have become more stringent. Taphole clay is a refractory material used to seal the taphole. At present, it can be divided into two categories: water taphole clay and anhydrous taphole clay. The former is used in medium and small blast furnaces with low top pressure and low strengthening smelting degree. The latter is on large and medium-sized blast furnaces with high top pressure and high degree of intensified smelting. [0003] With the continuous strengthening of blast furnace smelting and higher production levels, the quality of blast furnace taphole work is becoming more and more important, and the requireme...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 田宝山向旭东罗志辉
Owner BAOSTEEL GROUP XINJIANG BAYI IRON & STEEL
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