Tamping plug for blast furnace spout and its preparation method

A technology of blast furnace iron tapping and gun mud, which is applied in the field of refractory materials, can solve the problems of high cost and high price, achieve stable performance, meet production requirements, and reduce costs

Inactive Publication Date: 2006-01-11
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is aimed at the comprehensive value-added utilization of existing high-alumina fly ash and the high price of raw materials used in blast furnace taphole mud, which results in higher costs, and proposes a blas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] raw material:

[0021] The quality requirements of the particles and fine powder of industrial grade corundum raw materials are, Al 2 o 3 The content is generally greater than 98%, and the bulk density is greater than 3.4g / cm 3 , the particle size is ≤10mm. Among them, 10-5mm corundum raw material particles account for 5% of the total batching mass fraction, 5-3mm corundum raw material particles account for 20% of the total batching mass fraction, 3-1mm corundum raw material particles account for 10% of the total batching mass fraction, corundum raw materials smaller than 1mm Particles accounted for 5% of the total batch mass fraction. The amount of industrial grade corundum added accounts for 40% of the total batching mass fraction;

[0022] The quality requirements for silicon carbide particles and fine powders are that the SiC content is required to be greater than 97%, the particle size is ≤0.3mm, and the added amount accounts for 13% of the total mass fraction ...

Embodiment 2

[0030] raw material:

[0031] The quality requirements for the particles and fine powder of industrial-grade brown corundum raw materials are, Al 2 o 3 The content is generally greater than 90%, and the bulk density is greater than 3.4g / cm 3 , the particle size is ≤10mm. Among them, 10-5mm corundum raw material particles accounted for 2% of the total batching mass fraction, 5-3mm corundum raw material particles accounted for 15% of the total batching mass fraction, 3-1mm corundum raw material particles accounted for 18% of the total batching mass fraction, corundum raw materials smaller than 1mm Particles account for 15% of the total batching mass fraction. The amount of industrial grade corundum added accounts for 50% of the total batching mass fraction;

[0032] The quality requirements of silicon carbide particles and fine powders are that the SiC content is required to be greater than 90%, the particle size is ≤0.3mm, and the addition amount accounts for 3% of the tota...

Embodiment 3

[0040] raw material:

[0041] The quality requirements of the granular and fine powder of dense high alumina bauxite clinker raw materials are, Al 2 o 3 The content is generally greater than 80%, and the bulk density is greater than 3.1g / cm 3 , the particle size is ≤10mm. Among them, 10-5mm corundum raw material particles accounted for 6% of the total batching mass fraction, 5-3mm corundum raw material particles accounted for 14% of the total batching mass fraction, 3-1mm corundum raw material particles accounted for 28% of the total batching mass fraction, corundum raw materials smaller than 1mm Particles account for 12% of the total batching mass fraction. The amount of industrial grade corundum added accounts for 35% of the total batching mass fraction;

[0042] The quality requirements for silicon carbide particles and fine powders are: the SiC content is required to be greater than 90%, the particle size is ≤0.3mm, and the added amount accounts for 7% of the total mas...

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Abstract

A stemming for the tap hole of blast furnace is proportionally prepared from industrial corundum particles, silicon carbide particles, medium-temp asphalt particles, Suzhou clay powder, coke powder, high-Al powdered coal ash and tar oil through proportional mixing, stirring and vacuum extruding. It features low cost and high stability.

Description

technical field [0001] The invention relates to a method for preparing low-cost, high-performance blast furnace taphole mud by adding high-alumina fly ash, which belongs to the technical field of refractory materials. Background technique [0002] Gun clay is a kind of refractory material used to seal the taphole of the iron tapping nozzle of the ironmaking blast furnace. When the tap hole of the blast furnace is blocked with blast mud, the tapping channel should be filled with tap mud, and a mud bag should be formed in the hearth to maintain a sufficient depth for the tap hole. When tapping, the tap hole is required to maintain a stable hole diameter. Uniform; try to avoid a large amount of molten and semi-molten high-temperature melt mucus spraying out after the iron is tapped. The taphole of the blast furnace has to be opened and filled many times every day, and the hot molten iron and slag liquid will physically and chemically corrode the taphole mud. If the quality of...

Claims

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Application Information

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IPC IPC(8): C21B7/12C04B35/035C04B35/10
Inventor 赵凯黄军同刘睿杨景周刘艳改黄朝晖
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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