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Gunning mix for kiln repair

A gunning material and kiln technology, applied in the field of gunning material, can solve the problems of poor adaptability and applicability, immature technology, etc., and achieve the effects of reducing adverse effects, simple formula, and fast sintering speed

Inactive 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 2

[0017] Embodiment 2 is different from Example 1 in that the weight percentages of the components of the main raw materials in the total weight of the main raw materials are: dead-burned magnesia: 37%; forsterite: 61%; borax: 1.0%; inorganic salts: 0.4%; Sodium tripolyphosphate: 0.2%; Sodium hexametaphosphate: 0.4%.

Embodiment 3

[0018] Embodiment 3 is different from Example 1 in that the weight percentages of the components of the main raw materials in the total weight of the main raw materials are: dead-burned magnesia: 41%; forsterite: 56%; borax: 1.4%; inorganic salts: 0.6%; Sodium tripolyphosphate: 0.4%; Sodium hexametaphosphate: 0.6%.

[0019] The dead-burned magnesia includes two specifications of particles with a particle size of 0.3mm to 1mm (including 0.3mm and not including 1mm) and fine powder with a particle size of 0.088mm, and 0.3mm to 1mm (including 0.3mm and not including 1mm) ) particles with a particle size of 0.088mm and fine powder with a particle size of 0.088mm in the mass percent of the whole gunning material are respectively: 13% and 26%; the forsterite includes magnesium with a particle size of 1mm to 3mm (including 1mm and 3mm There are two specifications of olivine particles and forsterite particles with a particle size of 0.3mm~1mm (including 0.3mm, excluding 1mm), and fors...

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PUM

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Abstract

The invention discloses a gunning mix for kiln repair. The gunning mix is characterized by comprising the following components by mass percent: 37-41% of dead burnt magnesia, 56-61% of forsterite, 1.0-1.4% of borax, 0.4-0.6% of inorganic salt, 0.2-0.4% of sodium tripolyphosphate and 0.4-0.6% of sodium hexametaphosphate. The gunning mix has the beneficial effects that forsterite and dead burnt magnesia are adopted as main raw materials; the gunning mix prepared with the formula has the advantages of high adhesive rate, good antistrip performance, high sintering speed, erosion resistance, anti-scouring performance and low high-temperature expansibility when applied to kilns and thermal equipment, and has more than 95% of adhesive rate; the mineral resources of the raw materials including magnesia and forsterite are abundant and the auxiliary raw materials can be obtained everywhere, so that the formula is simple and the inventory costs of the raw materials are reduced; the high adhesive rate of the product is favorable for not only achieving reduction of the production cost but also reducing the adverse effects of residues on molten steel.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a 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 waste , increased production costs; ...

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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