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Fire-proof pouring material of iron tap channel of blast-furnace and production thereof

A technology for refractory materials and castables, applied in the field of refractory materials, can solve the problems of high cost and high price, and achieve the effect of stable performance and cost reduction.

Inactive Publication Date: 2006-03-15
无锡市南方耐材有限公司
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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 to propose a blast furnace slag-resistant performance and excellent performance for the comprehensive value-added utilization of the existing high-alumina fly ash and the high price of raw materials used in the castable of the blast furnace tapping trough, resulting in high cost. Low-cost refractory castable for blast furnace tapping trough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] The technological process for the preparation of castables for blast furnace tap troughs with added fly ash is as follows:

[0018] Raw materials→ingredients→mixer mixing→packaging→shipping→use site→stirring→adding water→stirring→vibration forming→drying→heat treatment→use

[0019] The high aluminum fly ash (the main chemical composition of fly ash is: SiO2) used in the present invention 2 : 40%~60% Al2 o 3 : 30% to 50%) contains a relatively large proportion of high temperature resistant phases such as alumina and silica, adding different mass fractions of fly ash to the iron trough castable can effectively reduce the blast furnace iron trough refractory castable Cost, and castable performance is excellent.

Embodiment 1

[0021] raw material:

[0022] 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 ≤40mm. Among them, 40-8mm corundum raw material particles account for 12% of the total batching mass fraction, 8-5mm corundum raw material particles account for 20% of the total batching mass fraction, 5-3mm corundum raw material particles account for 18% of the total batching mass fraction, and 3-1mm corundum raw material particles account for 18% of the total batching mass fraction. The corundum raw material particles account for 10% of the total batch mass fraction, and the corundum raw material particles smaller than 1mm account for 10% of the total batch mass fraction. The amount of industrial-grade corundum added accounts for 70% of the total ingredient mass fraction;

[0023] The quality requirements of silicon c...

Embodiment 2

[0041] raw material:

[0042] 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 ≤40mm. Among them, 40-8mm corundum raw material particles account for 5% of the total batching mass fraction, 8-5mm corundum raw material particles account for 20% of the total batching mass fraction, 5-3mm corundum raw material particles account for 15% of the total batching mass fraction, and 3-1mm corundum raw material particles account for 15% of the total batching mass fraction. The corundum raw material particles account for 10% of the total batch mass fraction, and the corundum raw material particles smaller than 1mm account for 5% of the total batch mass fraction. The amount of fused brown corundum accounts for 55% of the total mass fraction of ingredients;

[0043] The quality requirements of silicon car...

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PUM

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Abstract

A fire-proof pouring material for blast-furnace iron tap channel and its production are disclosed. The pouring material consists of industrial schmigel, SiC fines, high-temperature asphalt superfine powder, alumina or calcium aluminate cement, a-Al2O3 superfine powder, SiO2 superfine micro-powder and metal silicon. The process is carried out by taking sodium tripolyphosphate or calgon or aluminum powder as additives, adding into aluminous fly ash, agitating, mixing, obtaining the pouring material, adding into 3-7% water, agitating, mixing, adding into mould, vibrating for vibrating bar or plate, naturally hardening and drying, demoulding, drying at 80-700 Deg C., heat treating and removing moisture. It costs low and has good availability.

Description

technical field [0001] The invention relates to a high-temperature-resistant material for a tap trough pouring material used in an iron-making blast furnace tap trough under high-temperature conditions, and belongs to the technical field of refractory materials. Background technique [0002] Fly ash is a large amount of waste discharged from fluidized bed boilers in large and medium thermal power plants. It is the fine ash collected by the dust collector after the pulverized coal that has been ground into a certain fineness is burned at a high temperature in a fluidized bed boiler. It is called fly ash or fly ash abroad. It is an active substance whose main chemical composition is silicon dioxide (SiO 2 ), aluminum oxide (Al 2 o 3 ), a small amount of iron oxide (Fe 2 o 3 ) and calcium oxide (CaO) (when coal is burned without calcium-containing desulfurizer). Of which SiO 2 and Al 2 o 3 The content is the highest, and the sum of the two generally accounts for more t...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/10
Inventor 黄军同赵凯杨景周刘睿刘艳改黄朝晖
Owner 无锡市南方耐材有限公司
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