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Converter fettling material and preparation method thereof

A technology of repairing materials and converters, which is applied in the field of converter repairing materials and its preparation, which can solve the problems of low strength, short service life and long sintering time of repairing materials, and achieve high economic benefits, long service life and shortened sintering time.

Inactive Publication Date: 2019-06-25
巩义市金利炉料厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the shortcomings of low strength, long sintering time and short service life in the prior art, the invention provides a converter repair charge and its preparation method

Method used

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  • Converter fettling material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A converter repair charge, prepared from the following raw materials in parts by weight: 8 parts of fused magnesia with a particle size of <0.088 mm, 6 parts of fused magnesia with a particle size of 0.088-1 mm, 15 parts of fused magnesia with a particle size of 1-3 mm, 38 parts of 3-5mm fused magnesia, 13 parts of 5-12mm fused magnesia, 12 parts of high-temperature asphalt, 4 parts of medium-temperature asphalt, 3 parts of tar, and 1 part of metal silicon powder.

[0020] Preparation:

[0021] The raw materials are weighed in proportion and stirred for 20 minutes to obtain a mixture; the mixture is pressed into a ball with a diameter of 30 mm by a ball press to obtain the converter repair charge.

Embodiment 2

[0023] A converter repair charge, prepared from the following raw materials in parts by weight: 11 parts of fused magnesia with a particle size of <0.088 mm, 7 parts of fused magnesia with a particle size of 0.088-1 mm, 18 parts of fused magnesia with a particle size of 1-3 mm, 35 parts of fused magnesia of 3-5mm, 15 parts of fused magnesia of 5-12mm, 8 parts of high-temperature asphalt, 2 parts of medium-temperature asphalt, 1 part of paraffin oil, and 3 parts of metal chromium powder.

[0024] The raw materials were weighed according to the proportion and stirred for 25 minutes to obtain a mixture; the mixture was pressed into a ball with a diameter of 40 mm by a ball press to obtain the converter repair charge.

Embodiment 3

[0026] A converter repair charge, prepared from the following raw materials in parts by weight: 8 parts of fused magnesia with a particle size of <0.088mm, 8 parts of fused magnesia with a particle size of 0.088-1mm, 16 parts of fused magnesia with a particle size of 1-3mm, 36 parts of 3-5mm fused magnesia, 14 parts of 5-12mm fused magnesia, 10 parts of high-temperature asphalt, 4 parts of medium-temperature asphalt, 2 parts of paraffin oil, and 2 parts of metal silicon powder.

[0027] The raw materials are weighed in proportion and stirred for 20 minutes to obtain a mixture; the mixture is pressed into a ball with a diameter of 40 mm by a ball press to obtain the converter repair charge.

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Abstract

The invention belongs to the technical field of uncertainty refractory materials in converter steelmaking, and particularly relates to a converter fettling material and a preparation method thereof. The converter fettling material is prepared from the following raw materials in parts by weight: 8-12 parts of fused magnesia with the particle size being less than 0.088 mm, 4-8 parts of fused magnesia with the particle size being 0.088-1 mm, 12-18 parts of fused magnesia with the particle size being 1-3 mm, 35-38 parts of fused magnesia with the particle size being 3-5 mm, 13-15 parts of fused magnesia with the particle size being 5-12 mm, 10-17 parts of a sintering agent, 1-3 parts of a binding agent, and 1-3 parts of an antioxidant. Raw materials are evenly mixed and pressed into 30-50 mm of spherical products through a ball pressing machine. The product of the converter fettling material reduces waste gas pollution, has the advantages of being high in strength, good in mobility, shortin sintering time and long in service life, and has high environment-friendly value and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of indeterminate refractories in converter steelmaking, and in particular relates to a converter repair charge and a preparation method thereof. Background technique [0002] Most of the steelmaking in large iron and steel enterprises is marked by converter steelmaking, and the furnace age of converter is an important technical and economic index in converter steelmaking. Converter materials are not only chemically corroded by high-temperature molten steel and slag during use, but also mechanically scoured by molten iron and scrap steel. Repairing is one of the important measures to prolong the service life of the furnace lining, shorten the shutdown maintenance time, and improve the utilization rate of the converter. [0003] Chinese patent CN101973775A discloses a repair charge and its preparation method, which uses fused magnesia, sintered magnesia, modified pitch, metal aluminum powder, iron oxide powde...

Claims

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Application Information

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IPC IPC(8): C04B35/047
CPCC04B35/0476C04B2235/3418C04B2235/48C04B2235/5427C04B2235/5436C04B2235/96C04B2235/9676
Inventor 郝新杰郝世圈
Owner 巩义市金利炉料厂
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