Preparation method of gunning mix for kiln repair

A gunning material and kiln technology, which is applied in the field of preparation of gunning material for repairing kilns, can solve the problems of poor adaptability and applicability, immature technology, etc., and achieve shortened furnace repair time, simple formula, and reduced inventory cost effect

Active Publication Date: 2013-12-18
浙江攀盛冶金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 3. Immature technology: product adhesion, cohesiveness, strength and sintering are more or less the same, there is no mature product that can fully meet the technical requirements, and there are many products, but the adaptability and applicability are not strong due to the influence of the environment and construction technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method embodiment 1 of gunning material for kiln repairing of the present invention, comprises the following steps successively:

[0020] a) crushing dead-burned magnesia into large particles of dead-burned magnesia with a jaw crusher;

[0021] b) Grinding large particles of dead-burned magnesia with a roller crusher into small particles of dead-burned magnesia with a particle size of 0.3 to 1 mm;

[0022] c) finely grinding part of the small particles of dead-burned magnesia with a ball mill into dead-burned magnesia fine powder with a particle diameter of 0.088mm;

[0023] d) breaking the forsterite into large particles of forsterite with a jaw crusher;

[0024] e) using a roller crusher to crush the large forsterite particles into small forsterite particles with a particle size of 0.1 mm to 3 mm;

[0025] f) Weigh borax: 1.2%; inorganic salts: 0.5%; sodium tripolyphosphate: 0.3%; sodium hexametaphosphate: 0.5%, pour into a forced mixer and stir for ...

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PUM

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Abstract

The invention discloses a preparation method of a gunning mix for kiln repair. The preparation method comprises the following steps in sequence: breaking dead burnt magnesia into large dead burnt magnesia particles; grinding the large dead burnt magnesia particles into small dead burnt magnesia particles; grinding part of the small dead burnt magnesia particles into dead burnt magnesia fine powder with a particle size of 0.088mm; breaking forsterite into large forsterite particles; grinding the large forsterite particles into small forsterite particles with particle sizes of 0.1-3mm; weighting borax, inorganic salt, sodium tripolyphosphate and sodium hexametaphosphate, premixing the materials and conveying the materials to a mixing system after premixing; screening the materials according to the difference of particle sizes; filling the small particles and the micro powder into a mixing system tank and conveying the materials to the mixing system after the materials are mixed; stirring dead burnt magnesia, forsterite, borax, inorganic salt, sodium tripolyphosphate and sodium hexametaphosphate in the mixing system simultaneously and then subpackaging the product, thus obtaining a finished product of the gunning mix. The preparation method has the beneficial effects that the formula is simple, thus reducing the inventory costs of the raw materials; the prepared product has a high adhesive rate, thus lowering the production cost.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to the improvement of a method for preparing gunning material for repairing kilns. Background technique [0002] Metallurgical industrial kilns, thermal equipment and structures, due to long-term work in high-temperature environments, have serious wear and tear. Therefore, gunning materials must be used to repair them after a period of use to meet the needs of normal use. [0003] At present, there are various types of gunning materials. Although they all have a certain repairing effect, there are many deficiencies in their adhesion, cohesiveness, strength and sintering properties, as follows: [0004] 1. High material consumption: The gunning material used in the current steelmaking has a low adhesion rate, and the adhesion rate is less than 80%. In the consumption of refractory materials per ton of steel, the consumption of sprayed lining material accounts for about 25%, causing a lot of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 于琪芳江群英
Owner 浙江攀盛冶金材料有限公司
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