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Carbonaceous repair material for converters and preparation method thereof

A repairing material and carbon technology, which is applied in the field of converter carbon repairing materials and its preparation, can solve problems such as poor fluidity, long repairing time, and difficulty in spreading

Active Publication Date: 2020-09-01
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

[0005] The embodiment of the present invention provides a converter carbonaceous repair material and its preparation method to solve the technical problems that traditional carbonaceous repair materials use asphalt as a binder, resulting in poor fluidity, difficult spreading, slow sintering and long repair time

Method used

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preparation example Construction

[0066] Embodiment 1 to embodiment 5 provide a kind of converter carbonaceous repair material and preparation method thereof, and its raw material composition comprises by weight: magnesia: 55-80 parts; Serpentine: 4-15 parts; Iron red powder 1- 5 parts; metal aluminum powder: 0.5-3 parts; medium temperature asphalt: 4-12 parts; resin powder: 2-10 parts; limestone: 0-5 parts; modified paraffin wax: 0.5-2 parts.

[0067] Among them, the particle size of the magnesia is ≤20mm, and the continuous particle size distribution is adopted; the mass fraction of MgO in the magnesia is ≥92%. The particle size of the serpentine is ≤0.178mm, and the mass fraction of MgO in the serpentine is ≥40%. The iron red powder includes iron oxide, the particle size of the iron red powder is ≤0.178mm, and the mass fraction of iron oxide is ≥90%. The particle diameter of the metal aluminum powder is ≤0.35mm, and the mass fraction of aluminum in the metal aluminum powder is ≥90%. The coking value of me...

Embodiment 1

[0074] The composition of raw materials for converter carbonaceous quick repair materials includes by weight percentage (%): magnesia 78%, its maximum particle size ≤ 20mm, adopting continuous particle size gradation; serpentine powder 4%; iron red powder 1%; metal aluminum powder 1% %; medium temperature asphalt 4%; resin powder 10%; modified paraffin 2%. The repair material has low fluidity and high sintering strength, and is used for repairing the damaged part of the large surface of the converter.

Embodiment 2

[0076] The composition of raw materials for converter carbonaceous quick repair materials includes by weight percentage (%): magnesia 65%, its maximum particle size ≤ 18mm, using continuous particle size gradation; serpentine 10%; iron red powder 3%; metal aluminum powder 2 %; medium temperature asphalt 9%; resin powder 8%; limestone 2%; modified paraffin 1%. The repairing material has good fluidity and high strength due to the high amount of resin powder added. It is used to repair the large surface of the converter lining and the small area of ​​the bottom of the furnace.

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Abstract

The invention provides a carbonaceous mending material for converters and a preparation method of the carbonaceous mending material. The carbonaceous mending material comprises the following components in parts by weight: 55-80 parts of magnesia, 4-15 parts of serpentine, 1-5 parts of iron oxide red powder, 0.3-3 parts of metal aluminum powder, 4-12 parts of a binder, 2-10 parts of resin powder, and 0.5-2 parts of a waterproof agent. By adopting the carbonaceous repair material for converters, the total repair time is 30-48 minutes, the repair time is short, the efficiency is high, the servicelife is 16-26 furnaces, the service life is long, a waterproof effect is achieved, and the storage time is long.

Description

technical field [0001] The invention belongs to the technical field of preparation of refractory materials for converter repair, and in particular relates to a converter carbonaceous repair material and a preparation method thereof. Background technique [0002] Carbonaceous repairing material is a hot repairing material used on the large surface of the converter or the bottom of the furnace. In addition to carbonaceous repairing materials, there are also water-based repairing materials that can repair converters, which have the advantages of good environmental protection, good fluidity, fast sintering and short repairing time, etc. Destructive effect, there are certain hidden dangers when the thickness of the furnace lining is too low and the furnace lining bricks are exposed, so the most used carbonaceous repair material is currently used. [0003] The modern steelmaking process has higher and higher requirements for the smelting effect, efficiency and cost of the convert...

Claims

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Application Information

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IPC IPC(8): C04B35/043
CPCC04B35/043C04B2235/3427C04B2235/3272C04B2235/402C04B2235/48
Inventor 张洪雷肖邦志彭长波刘黎张军张利锋徐国涛周旺枝
Owner 武汉钢铁有限公司
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