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Wear-resistant material for flushing slag ditch of high-strength blast furnace and preparation method thereof

A wear-resistant material and blast furnace technology, applied in the field of industrial building materials, can solve the problems of insufficient wear resistance, poor thermal shock resistance, low bulk density, etc., and achieve good impact resistance, good wear resistance, and high bulk density. Effect

Active Publication Date: 2017-01-11
CHINA JINGYE ENG TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The applicable temperature of this kind of inorganic wear-resistant material is generally less than 500°C, while the temperature of blast furnace slag is generally 1400-1500°C. Long-term impact of high temperature water slag, the material is prone to peeling and damage
[0004] (2) Poor thermal shock resistance
In blast furnace production, two flushing slag ditches are generally used to discharge slag in a circular manner. The flushing slag ditch has to withstand the thermal shock impact of long-term rapid temperature changes. However, the main materials of the current inorganic wear-resistant materials are quartz sand and cement, which have low thermal conductivity. , poor high temperature resistance, poor thermal shock resistance to temperature changes
[0005] (3) poor wear resistance
The main material of this kind of inorganic wear-resistant material is quartz sand, its Mohs hardness is 7, its wear resistance is not good enough, the overall volume density of the material is small, the porosity is high, and the wear resistance is still poor

Method used

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  • Wear-resistant material for flushing slag ditch of high-strength blast furnace and preparation method thereof
  • Wear-resistant material for flushing slag ditch of high-strength blast furnace and preparation method thereof
  • Wear-resistant material for flushing slag ditch of high-strength blast furnace and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The raw material composition of wear-resistant materials for high-strength blast furnace flushing slag ditch is as follows: by weight percentage, brown corundum 38%; silicon carbide 10%; mullite 15.3%; cement 30%; silicon dioxide micropowder 2%; metal silicon 0.5% ; Aluminum 0.05%; Water reducing agent 0.15%; Steel fiber 4%.

[0036] The preparation method is as follows: put cement, silicon dioxide micropowder, metal silicon, metal aluminum, and water reducing agent into the DSH-1 type double-helix conical mixer according to the above weight percentage and stir evenly to prepare premixed powder; then, premixed powder , brown corundum, silicon carbide, mullite, and steel fiber are put into the JW-350 type forced mixer according to the above weight percentage and stirred evenly, and the wear-resistant material for high-strength blast furnace flushing slag ditch can be obtained.

Embodiment 2

[0038] The raw material composition of wear-resistant materials for high-strength blast furnace flushing slag ditch is as follows: by weight percentage, brown corundum 32.5%; silicon carbide 20%; mullite 10.3%; cement 30%; silicon dioxide micropowder 2%; metal silicon 1% ; Aluminum 0.05%; Water reducing agent 0.15%; Steel fiber 4%.

[0039] The preparation method is the same as in Example 1 to prepare the wear-resistant material for blast furnace flushing slag ditch.

Embodiment 3

[0041] The raw material composition of wear-resistant materials for high-strength blast furnace flushing slag ditch is as follows: by weight percentage, brown corundum 38%; silicon carbide 15%; mullite 10.3%; cement 30%; silica micropowder 2%; metal silicon 0.5% ; Aluminum 0.05%; Water reducing agent 0.15%; Steel fiber 4%.

[0042] The preparation method is the same as in Example 1 to prepare the wear-resistant material for blast furnace flushing slag ditch.

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Abstract

The invention provides a high-strength wear-resistant material for a blast-furnace water slag flushing channel and a preparation method of the high-strength wear-resistant material. The high-strength wear-resistant material for the blast-furnace water slag flushing channel comprises the following raw materials in percentage by weight: 25%-50% of corundum, 10%-20% of silicon carbide, 10%-20% of mullite, 25%-40% o cement, 2%-5% of silica micro-powder, 0.5%-1% of metallic silicon, 0.05%-0.1% of metallic aluminium, 0.05%-0.2% of a water reducing agent and 1%-4% of steel fiber. The high-strength wear-resistant material for the blast-furnace water slag flushing channel provided by the invention is high in applicable temperature, good in thermal shock resistance, good in abrasive resistance and long in service life.

Description

technical field [0001] The invention relates to a wear-resistant material for a high-strength blast furnace flushing slag ditch and a preparation method thereof, belonging to the technical field of industrial building materials. Background technique [0002] The blast furnace slag ditch is a channel for preparing blast furnace slag into water slag and transporting the water slag to the water slag treatment system. At present, the lining of the flushing slag ditch is mainly made of cast iron plates or cast steel plates, which are easily oxidized and corroded, have poor water slag impact and wear resistance, and have a service life of less than one year. In recent years, some inorganic wear-resistant materials have been applied to flushing slag ditch, which are better than cast iron plates and cast steel plates in terms of structural integrity, corrosion resistance, and impact resistance, but there are still the following disadvantages during use: [0003] (1) The applicable ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B38/02C04B22/02C04B22/04C04B14/04C04B14/30C04B14/32C04B14/48
Inventor 张君博徐自伟刘兴平郑期波李洪会范咏莲沈岩林张正富
Owner CHINA JINGYE ENG TECH CO LTD
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