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Environment-friendly converter bedding-face repairing material and preparation method thereof

An environmentally friendly and repairing material technology, applied in the field of refractory materials, can solve the problems of a lot of smoke, poor fluidity, long sintering time, etc., and achieve the effects of easy sintering, good fluidity, and reducing the amount of smoke and dust

Inactive Publication Date: 2014-08-13
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The repairing material overcomes the technical problems of poor fluidity, long sintering time, and a large amount of smoke and dust existing in traditional tar-pitch-bonded repairing materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] An environment-friendly converter large surface repair material, its components are calculated by weight percentage: 45% of sintered magnesia, 37% of recycled waste magnesia-chrome bricks, 3% of asphalt powder, 10% of tar, and 2% of N-methylpyrrolidone , ethylene glycol 1%, o-xylene 2%; the particle size and weight percentage composition of various particles of the main raw materials sintered magnesia and waste magnesia-chrome bricks are: 1≤particle size≤3mm accounts for 70%; 0.074< Particle size < 1mm accounts for 20%; particle size ≤ 0.074mm accounts for 10%. The weight percentage of total iron in sintered magnesia and waste magnesia-chrome bricks is both 5%. The particle size of asphalt powder is 0.02-0.074mm.

[0023] The preparation method of the environment-friendly converter large surface repair material comprises the following steps:

[0024] 1) Sorting sintered magnesia and recycled waste magnesia-chrome bricks, removing impurities on the surface, and pre-crush...

Embodiment 2

[0031] An environment-friendly repairing material for large surfaces of converters, the components of which are calculated by weight percentage: 60% of sintered magnesia, 22% of recycled waste magnesia-chrome bricks, 5% of asphalt powder, 10% of tar, and 2% of N-methylpyrrolidone , ethylene glycol 1%; the particle size and weight percentage composition of the main raw material sintered magnesia particles are: 1≤particle size≤3mm accounts for 50%; 0.074<particle size<1mm accounts for 30%; particle size≤0.074mm accounts for 20%, the particle size and weight percentage composition of waste magnesia-chrome brick particles are: 1≤particle size≤3mm accounts for 60%; 0.074<particle size<1mm accounts for 25%; particle size≤0.074mm accounts for 15%, The weight percent content of all iron in waste magnesia-chrome bricks and waste magnesia-chrome bricks is 4%, and the particle size of asphalt powder is 0.02-0.05mm.

[0032] The preparation method of the environment-friendly converter lar...

Embodiment 3

[0036] An environment-friendly converter large surface repair material, its components are calculated by weight percentage: 62% of sintered magnesia, 22% of recycled waste magnesia-chrome bricks, 5% of asphalt powder, 7% of tar, and 2% of N-methylpyrrolidone , 1% ethylene glycol, 1% o-xylene; the particle size and weight percentage composition of the main raw material sintered magnesia particles are: 1≤particle size≤3mm accounts for 80%; 0.074<particle size<1mm accounts for 10%; Particle size ≤ 0.074mm accounts for 10%, and the particle size and weight percentage of waste magnesia-chrome brick particles are: 1≤particle size≤3mm accounts for 50%; 0.074<particle size<1mm accounts for 30%; particle size≤0.074mm accounts for 30% 20%, sintered magnesia and waste magnesia-chrome bricks have a weight percentage of total iron of 4%, and the particle size of asphalt powder is 0.03-0.06mm.

[0037] The preparation method of the environment-friendly converter large surface repair materia...

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PUM

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Abstract

The invention discloses an environment-friendly converter bedding-face repairing material and a preparation method thereof. The repairing material comprises the following ingredients by weight percent: 30 to 65 percent of sintering magnesium sand, 10 to 45 percent of waste magnesite-chrome bricks, 1 to 10 percent of asphalt powder, 5 to 15 percent of tar, 1 to 5 percent of ethanol, 1 to 5 percent of N-methyl-2-pyrrolidinone and 0 to 5 percent of o-xylene. The preparation method comprises the following steps: 1) pre-crushing the sorted sintering magnesium sand and recycled waste magnesite-chrome bricks; 2) uniformly mixing the pre-crushed sintering magnesium sand and waste magnesite-chrome bricks to obtain a mixed coarse material; 3) finely crushing the mixed coarse material to obtain a mixed fine material; 4) uniformly mixing the mixed fine material and asphalt powder in a stirring machine; 5) adding tar, ethernol, N-methyl-2-pyrrolidinone and o-xylene, and stirring the mixture for 10 to 25 minutes. The practices prove that the converter repairing material has good mobility, can be sintered easily, has long service life and generates little smoke when sintered.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to an environment-friendly converter large surface repair material. technical background [0002] There are two main types of large surface repair materials for converters that use organic binders. One type uses tar pitch or resin as a binder. This repair material has high bonding strength and long service life, but this repair material has poor fluidity and sintering time. Long, affecting the production efficiency of the converter, and there is a lot of smoke and dust during sintering, causing environmental pollution; one type is a water-based repairing material that uses inorganic substances such as metasilicate or phosphate as a binder. Although it is environmentally friendly, the sintering time is relatively short. However, this kind of repair material has loose structure, low strength and short service life. Contents of the invention [0003] The obj...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 周旺枝徐国涛刘黎张洪雷
Owner 武汉钢铁有限公司
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