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Fireproof materials for pressed repairing and method for preparing same

A technology of refractory materials and additives, which is applied in the field of refractory materials to achieve the effects of strong bonding ability, dense structure and prolonged service life

Inactive Publication Date: 2005-08-17
WUHAN IRON & STEEL (GROUP) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the repair material combined with phenolic resin by Sumitomo Corporation of Japan, its main chemical composition is Al 2 o 3 , SiO 2、 , SiC or MgO, SiC, fixed carbon; in China, the General Institute of Metallurgical Construction reported a repair material combined with thermoplastic phenolic resin, the main chemical composition of which is Al 2 o 3 , SiO 2 , Fe 2 o 3 、K 2 O+Na 2 O, TiO 2 ; Luoyang Institute of Refractory Materials reported a repair material combined with two phenolic resins with different properties, and its main chemical composition is Al 2 o 3 ,, SiO 2 , Fe 2 o 3 、K 2 O+Na 2 O, TiO 2 ; Maanshan Iron and Steel Company reported a press-in repair material combined with phenolic resin and tar pitch, and its main chemical composition is Al 2 o 3 ,, SiO 2 , Fe 2 o 3 , MgO, CaO, repairing refractory materials with phenolic resin as a binder, people add a large amount of organic solvents such as acetone in order to increase the fluidity during pressing, which will cause honeycomb holes to form after the organic solvent volatilizes at high temperature after being pressed. , the structure after sintering is not very dense, and it is also prone to damage and peeling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The refractory material used for press-in repair, the components and parts by weight are: 23 parts of bauxite, 33 parts of coke gem, 3 parts of clay, 12 parts of silicon carbide, 3 parts of carbon, 2 parts of dilithium oxide, 2 parts of dilithium oxide 1 part of boron, 20 parts of thermoplastic phenolic resin, 2 parts of silicone resin, 1 part of tar.

[0024] Preparation method, its steps:

[0025] 1) Mix 23 parts of bauxite, 33 parts of coke, 3 parts of clay, 12 parts of silicon carbide, 3 parts of carbon, 2 parts of dilithium oxide, and 1 part of diboron trioxide to achieve uniformity and form increased additive refractory matrix;

[0026] 2) Heat, stir and mix 20 parts of thermoplastic phenolic resin, 2 parts of silicone resin and 1 part of tar at 80°C to form an organic binder;

[0027] 3) Stir and mix the prepared organic binder with the additive-added refractory matrix mixture, make it uniform, and then pack it for use.

Embodiment 2

[0029] The refractory material used for press-in repair, the components and parts by weight are: 67 parts of coke gemstone, 3 parts of clay, 3 parts of silicon carbide, 1 part of carbon, 1 part of dilithium oxide, 2 parts of diboron trioxide, thermoplastic 20 parts of phenolic resin, 2.9 parts of silicone resin, 0.1 part of tar.

[0030] Preparation method, its steps:

[0031] 1) Stir and mix 67 parts of the above-mentioned burnt gemstones, 3 parts of clay, 3 parts of silicon carbide, 1 part of carbon, 1 part of dilithium oxide, and 2 parts of diboron trioxide to form a refractory matrix with additives ;

[0032] 2) Heat, stir and mix 20 parts of thermoplastic phenolic resin, 2.9 parts of silicone resin and 0.1 part of tar at 110°C to form an organic binder;

[0033] 3) Stir and mix the prepared organic binder with the additive-added refractory matrix mixture, make it uniform, and then pack it for use.

Embodiment 3

[0035] The refractory material used for press-in repair, the components and parts by weight are: 38 parts of corundum, 20 parts of coke gem, 3 parts of clay, 12 parts of silicon carbide, 3 parts of dilithium oxide, 1 part of diboron trioxide, thermoplastic phenolic 21.4 parts of resin, 1.5 parts of silicone resin, 0.1 part of tar.

[0036] Preparation method, its steps:

[0037] 1) Stir and mix the above-mentioned 38 parts of corundum, 20 parts of coke gem, 3 parts of clay, 12 parts of silicon carbide, 3 parts of dilithium oxide, and 1 part of diboron trioxide to form a refractory matrix with additives added;

[0038] 2) Heat and stir 21.4 parts of thermoplastic phenolic resin, 1.5 parts of silicone resin, and 0.1 part of tar at 180°C to form an organic binder;

[0039] 3) Stir and mix the prepared organic binder with the additive-added refractory matrix mixture, make it uniform, and then pack it for use.

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PUM

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Abstract

The present invention relates to refractory material for pressing repair and its preparation process. The refractory material for pressing repair consists of organic binding agent in 3-35 weight portions, refractory material base in 20-80 weight portions and additive in 1-10 weight portions. The preparation process includes the following steps: preparing refractory material base with two or more of high alumina bauxite, bauxite, corundum, clay, SiC and carbon; adding additive; adding organic silicon resin, tar and thermoplastic phenolic resin, mixing homogeneously through stirring and heating at 60-200 deg.c to obtain the organic binding agent; mixing the refractory material base with additive and the organic binding agent; and packing.

Description

technical field [0001] The invention belongs to refractory materials, in particular to a refractory material for press-in repair and a preparation method. Background technique [0002] At present, when using the press-in method to repair equipment such as blast furnaces, RH vacuum furnaces, and mixed iron furnaces, there are mainly two types of refractory materials used, namely, water-based bonding materials and materials using phenolic resin as a bonding agent. [0003] The water-based binding material is mainly composed of water glass, cement and phosphate, and its main chemical composition is Al 2 o 3、 , Fe 2 o 3 、K 2 O+Na 2 O, SiC, the binder is aluminum dihydrogen phosphate, such as: Patent No. 01133640.4 of the published patent for repairing refractories for converters, the main components are sintered magnesia, dolomite, sodium metasilicate, sodium hexametaphosphate ; Patent No. is the patent of 01106497.8, also discloses the repairing refractory material that i...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/66
Inventor 徐国涛张洪雷刘国明王悦李安平秦殷
Owner WUHAN IRON & STEEL (GROUP) CORP
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