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Sol combined fire resistant repair material and repair method

A repairing material and repairing material technology, applied in the field of sol-bonded refractory repairing materials and repairing, can solve the problems of low high temperature bonding strength, poor corrosion resistance, difficult to quickly bake, etc. The effect of building time

Inactive Publication Date: 2009-01-21
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of existing refractory repair materials such as low high-temperature bonding strength, slow solidification, difficulty in rapid baking, easy falling off, and poor erosion resistance. The present invention provides a sol-bonded refractory repair material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: A sol-bonded refractory repair material, its components and parts by weight are: 70 parts of bauxite, 10 parts of burnt gemstones, 70% of coarse aggregate, 30% of powder, and 5 parts of silicon carbide less than 200 mesh , 3.5 parts of micro-powder of silica, 3.5 parts of micro-powder of alumina, 7 parts of silica sol, 1 part of calcium aluminate cement.

[0022] A repairing method using the above-mentioned sol-bonded refractory repairing material, the method comprises the following steps:

[0023] (1) Initially mix the repair material base composed of 70 parts of bauxite, 10 parts of burnt gemstone coarse aggregate and powder, and then add 5 parts of silicon carbide less than 200 meshes, 3.5 parts of silicon oxide micropowder, and 3.5 parts of alumina The fine powder and 1 part of calcium aluminate cement are pre-mixed uniformly in a forced mixer, and packed for use;

[0024] (2) Put the packaged refractory repair material into the hopper of the semi-dry...

Embodiment 2

[0027] Example 2: A sol-bonded refractory repair material, its components and parts by weight are: 66.5 parts of sub-white corundum, 10 parts of sintered tabular corundum, 70% of coarse aggregate, 30% of powder, and silicon carbide less than 200 mesh : 12 parts, 2.5 parts of fine powder of silica, 2.5 parts of fine powder of alumina, calcium aluminate cement: 0.5 part.

[0028] A repairing method using the above-mentioned sol-bonded refractory repairing material, the method comprises the following steps:

[0029] Pre-mix 66.5 parts of sub-white corundum, 10 parts of sintered tabular alumina, 12 parts of silicon carbide less than 200 meshes, 2.5 parts of silicon oxide micropowder, 2.5 parts of alumina micropowder, and 0.5 part of calcium aluminate cement in a forced mixer , packaged for use; put the packaged sol combined with refractory repair material into the forced mixer, add 6 parts of silica sol solution; form repair mud, subsidize or spread in the ladle or iron ditch. Th...

Embodiment 3

[0031] Embodiment 3: A sol-bonded refractory repair material, its components and parts by weight are: 66.4 parts of bauxite, 10 parts of corundum, 85% of coarse aggregate, 15% of powder, 12 parts of silicon carbide less than 200 meshes, 3 parts of micro-powder of silica, 3 parts of micro-powder of alumina, bauxite cement: 0.6 part.

[0032] A repairing method using the above-mentioned sol-bonded refractory repairing material, the method comprises the following steps:

[0033] Mix 66.4 parts of bauxite, 10 parts of corundum, 12 parts of silicon carbide, 3 parts of micro-powder of silicon oxide, 3 parts of micro-powder of alumina, and 0.6 part of bauxite cement in a forced mixer, and pack them for use; Put the sol and refractory repair material into the hopper of the mixer, add 5 parts of silica sol solution, and stir evenly; form a mud material, repair the damaged part of the main iron trench to form a repair layer, dry it and bake it moderately Put into use.

[0034] The com...

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PUM

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Abstract

The invention relates to the technical field of a refractory material, in particular to a sol-bonded refractory repair material and a repair method thereof. In order to overcome the disadvantages that the prior refractory repair material is low in high-temperature bonding strength, slow to solidify, difficult to bake fast, easy to fall off, poor in anti-erosion capability, and so on, and the invention provides the sol-bonded refractory repair material, consisting of a repair material matrix, silicon carbide, silicon oxide or alumina micropowder, sol and promoting coagulant. Compared with the prior art, the refractory repair material can increase the bonding strength of the repair material with a furnace lining of a main channel, a slag groove, a hot metal ladle, a torpedo tank or other place, has good durability, prolongs the service life of the furnace lining, decreases repair time, simultaneously raises the anti-erosion capability of the furnace lining, and reduces the refractory material consumption of iron systems.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a sol-bonded refractory repair material and a repair method. Background technique [0002] In the past, semi-dry repair materials were usually used for repairing the furnace lining of iron ditch, slag ditch, iron ladle, torpedo tank and other parts of the ironmaking system. The main components are brown corundum, bauxite and clay, with a relatively high content of phosphate or cement Binder, low bond strength, easy to peel off. Phosphate or cement as the binder will bring in substances with low melting points, which will erode the furnace lining greatly, resulting in poor use effect, low service life and poor durability. Japan Kawasaki Refractories Co., Ltd. developed a repair material for transporting molten steel or molten iron container refractory lining. The material contains calcium lactate, aluminum lactate, 1-10wt% asphalt, 0.5-2wt% B 4 C powder, 0.5-2wt% Si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 徐国涛李怀远张洪雷
Owner 武钢集团有限公司
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