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Castables for the main ditch of the iron ditch in front of the blast furnace

A castable and blast furnace technology, which is applied in the field of castables for the main channel of the iron ditch in front of the blast furnace, can solve problems such as waste disposal, and achieve the effects of saving resources, reducing production costs and improving anti-scour performance.

Active Publication Date: 2020-09-18
SHANGHAI BAOMING REFRACTORIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the castable material of the main ditch in front of the blast furnace is generally made of silicon carbide-carbon refractory castable composed of corundum + silicon carbide + carbon. On the one hand, the increase in raw material prices has brought great pressure to the development of the industry. On the other hand, With the continuous improvement of the country's environmental protection requirements, the refractory industry is also generally facing the problem of waste disposal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Example 1: A castable for the main ditch of the iron channel in front of a blast furnace, comprising: 50% of 1-10mm scrapped electronic porcelain, 15% of 0-0.074mm scrapped electronic porcelain, 25% of silicon carbide, and 5% of alumina cement %, 0.5~0.074mm high temperature asphalt 3%, additive 2%. In this embodiment, the additive is sodium tripolyphosphate. Among them, the scrapped electronic porcelain requirements: Al 2 o 3 ﹥85%, bulk density ﹥3.6g / cm 3 , RO﹥0.5%.

Embodiment 2

[0010] Example 2: A casting material for the main ditch of the iron channel in front of a blast furnace, comprising: 55% of 1-10mm scrap electronic porcelain, 14% of 0-0.074mm scrap electronic porcelain, 23% of silicon carbide, and 5% of alumina cement %, 0.5~0.074mm high temperature asphalt 2%, additive 1%. In this embodiment, sodium hexametaphosphate is used as the additive. Among them, the scrapped electronic porcelain requirements: Al 2 o 3 ﹥85%, bulk density ﹥3.6g / cm 3 , RO﹥0.5%.

Embodiment 3

[0011] Example 3: A castable for the main ditch of the iron ditch in front of a blast furnace, including: 60% of 1-10mm scrap electronic porcelain, 13% of 0-0.074mm scrap electronic porcelain, 22% of silicon carbide, and 2% of alumina cement %, 0.5~0.074mm high temperature asphalt 1.5%, additive 1.5%. In this embodiment, sodium hexametaphosphate is used as the additive. Among them, the scrapped electronic porcelain requirements: Al 2 o 3 ﹥85%, bulk density ﹥3.6g / cm 3 , RO﹥0.5%.

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Abstract

The invention discloses a castable for a main channel of a stokehold iron flowing channel of a blast furnace. The castable comprises the following components in percentage by weight: 50-70% of 1-10mmscrapped electronic porcelain, 10-15% of 0-0.074mm scrapped electronic porcelain, 14-25% of silicon carbide, 2-5% of alumina cement, 1-4 of 0.5-0.074mm high-temperature asphalt and 1-3% of additives.

Description

Technical field: [0001] The invention relates to a monolithic refractory material, in particular to a casting material for the main ditch of an iron ditch in front of a blast furnace. Background technique: [0002] In the prior art, the castable material of the main ditch in front of the blast furnace is generally made of silicon carbide-carbon refractory castable composed of corundum + silicon carbide + carbon. On the one hand, the increase in raw material prices has brought great pressure to the development of the industry. On the other hand, With the continuous improvement of the country's environmental protection requirements, the refractory industry is also generally facing the problem of waste disposal. Therefore, how to effectively utilize waste is a trend in the development of the industry. Invention content: [0003] The technical problem to be solved by the present invention is to provide a castable for the main ditch of the iron ditch in front of the blast furn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 唐龙燕李家斌
Owner SHANGHAI BAOMING REFRACTORIES CO LTD