Ladle edge castable containing alumina magnesia carbon brick slag

A technology of alumina-magnesia-carbon brick slag and alumina-magnesia-carbon brick, which is applied in the field of refractory materials, can solve the problems of reduced mechanical strength, high cost of castables, and easy damage, and achieves the effects of low cost, synchronous life, and excellent performance

Inactive Publication Date: 2014-02-26
河南海格尔高温材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of high cost, low mechanical strength and easy breakage of castables in the pr

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A ladle ladle edge castable containing aluminum-magnesium-carbon brick slag, the castable is made of aggregate, fine powder and admixture, in parts by weight, the aggregate consists of 25 parts with a particle size of 3-5mm Al-Mg-C brick slag waste, 20 parts of Al-Mg-C brick waste with a particle size of 1-3mm and 25 parts of Al-Mg-C brick slag with a particle size of 0-1mm, the fine powder consists of 15 parts of 625 cement, 3 Part of silicon dioxide micropowder and 22 parts of 200 mesh first-grade high alumina powder, the admixture is composed of 0.2 part of polycarboxylate water reducer and 7 parts of water.

[0018] Through chemical analysis, the carbon content is 8.72%, the magnesium oxide content is 13.6%, the compressive strength at room temperature is 39MPa, the compressive strength at 1350℃×3h is 46MPa, and the line change rate after burning at 1350℃×3h is 0.3%; it achieves micro-expansion and avoids wrapping Shrinkage and cracking, the carbon content in the ma...

Embodiment 2

[0020] A ladle ladle edge castable containing aluminum-magnesium-carbon brick slag, the castable is made of aggregate, fine powder and admixture, in parts by weight, the aggregate consists of 20 parts with a particle size of 3-5mm Alumina-magnesia-carbon brick slag waste, 25 parts of alumina-magnesia-carbon brick slag waste with a particle size of 1-3mm and 25 parts of alumina-magnesia-carbon brick slag waste with a particle size of 0-1mm, the fine powder is composed of 10 parts of 625 cement, two It consists of 4 parts of silica micropowder and 24 parts of 200-mesh first-grade high-alumina powder, and the admixture is composed of 0.1 part of polycarboxylate water reducer and 8 parts of water.

[0021] Through chemical analysis, the carbon content is 8.52%, the magnesium oxide content is 13.2%, the compressive strength at room temperature is 34MPa, the compressive strength at 1350℃×3h is 42MPa, and the line change rate after burning at 1350℃×3h is 0.3%; it achieves micro-expans...

Embodiment 3

[0023] A ladle edge castable containing aluminum-magnesium-carbon brick slag, the castable is made of aggregate, fine powder and admixture, in parts by weight, the aggregate consists of 30 parts with a particle size of 3-5mm Al-Mg-C brick slag waste, 15 parts of Al-Mg-C brick waste with a particle size of 1-3mm and 20 parts of Al-Mg-C brick slag with a particle size of 0-1mm, the fine powder consists of 20 parts of 625 cement, 4 1 part of silica micropowder and 20 parts of 200-mesh primary high-alumina powder, and the admixture is composed of 0.1 part of polycarboxylate water reducer and 6 parts of water.

[0024] Through chemical analysis, the carbon content is 8.59%, the magnesium oxide content is 13.3%, the compressive strength at room temperature is 41MPa, the compressive strength at 1350℃×3h is 49MPa, and the line change rate after burning at 1350℃×3h is 0.3%; it achieves micro-expansion and avoids wrapping Shrinkage and cracking, the carbon content in the material is goo...

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Abstract

The invention relates to a ladle edge castable containing alumina magnesia carbon brick slag, which is prepared by mixing aggregate, fine powder and an admixture. The aggregate is composed of the following components in parts by weight: 20-30 parts of alumina magnesia carbon brick slag waste with the particle size of 3-5mm, 15-25 parts of alumina magnesia carbon brick slag waste with the particle size of 1-3mm and 20-30 parts of alumina magnesia carbon brick slag waste with the particle size of 0-1mm. The fine powder is composed of the following components in parts by weight: 10-20 parts of 625 cement, 2-4 parts of silicon dioxide micropowder and 20-24 parts of 200-mesh high aluminum powder. The admixture is composed of the following components in parts by weight: 0.1-0.3 part of polycarboxylic acid water reducer and 6-8 parts of water. The castable provided by the invention has the advantages of wide raw material sources, low cost and favorable properties, and can satisfy the service performance requirements for the ladle edge in the ladle edge molding process under different technological conditions; and by using the waste refractory reclaimed material as the main raw material, the castable achieves the goal of comprehensive utilization of the waste refractory material.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a ladle edge castable containing aluminum-magnesia-carbon brick slag. Background technique [0002] The main function of the unshaped refractory material used in the ladle is to compress the refractory bricks of the lower ladle slag line to prevent the loosening and falling of the refractory bricks of the ladle slag line. There are mainly refractory plastics and refractory castables. During the actual production and operation of the ladle, due to the splashing of molten slag and molten steel when the ladle is blown with argon, serious nodules along the ladle are caused; due to the intermittent working mode of the ladle, frequent fluctuations in the thermal state of the ladle and periodic thermal stress, especially Along the ladle, the temperature change range is greater, causing cracks and spalling of the refractory material along the ladle; in addition, during t...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 申利营邵淑英李天学巴明山杨爱华
Owner 河南海格尔高温材料有限公司
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