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Novel RH gunning refractory

A new type of gunning material, applied in the field of refractory materials, can solve the problems of corrosion resistance, poor penetration resistance, low service life, single use, etc., and achieve the effect of improving corrosion resistance, low cost and wide range of uses.

Active Publication Date: 2012-09-12
攀枝花市银江金勇工贸有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an RH gunning material that can significantly prolong the service life of the RH insertion tube and produce A new type of RH gunning material with lower cost and more friendly environment

Method used

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Experimental program
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Effect test

Embodiment 1

[0056]According to the performance index and particle size requirements of raw materials, according to weight percentage, 50% of fused magnesia coarse powder, 20% of fused magnesia fine powder, 20% of chrome ore, 1% of slaked lime, 1% of light calcium carbonate, hexadecimal Sodium phosphate 2%, borax 3%, silica powder 2%, sodium tripolyphosphate 0.9%, carboxymethyl cellulose 0.1%, first add fused magnesia coarse powder and chrome ore to the mixing equipment, and then sieve borax Finally, it is added together with the fine powder of fused magnesia, and finally sodium hexametaphosphate, sodium tripolyphosphate, silicon micropowder, slaked lime, light calcium carbonate, carboxymethyl cellulose are added, and the material is fully mixed and stirred evenly before discharging. The finished product is obtained after inspection and packaging.

Embodiment 2

[0058] According to the performance index and particle size requirements of raw materials, according to weight percentage, 60% of fused magnesia coarse powder, 15% of fused magnesia fine powder, 10% of chrome ore, 0.5% of slaked lime, 4% of light calcium carbonate, hexadecimal Sodium phosphate 4%, borax 2%, silicon micropowder 3%, sodium tripolyphosphate 1.495%, carboxymethyl cellulose 0.005%, first add fused magnesia coarse powder and chrome ore to the mixing equipment, and then sieve borax Finally, it is added together with the fine powder of fused magnesia, and finally sodium hexametaphosphate, sodium tripolyphosphate, silicon micropowder, slaked lime, light calcium carbonate, carboxymethyl cellulose are added, and the material is fully mixed and stirred evenly before discharging. The finished product is obtained after inspection and packaging.

Embodiment 3

[0060] According to the performance index and particle size requirements of raw materials, 50.45% of fused magnesia coarse powder, 30% of fused magnesia fine powder, 10% of chrome ore, 2% of slaked lime, 2% of light calcium carbonate, and hexadecimal Sodium phosphate 1%, borax 2%, silica powder 2%, sodium tripolyphosphate 0.5%, carboxymethyl cellulose 0.05%, first add fused magnesia coarse powder and chrome ore to the mixing equipment, and then sieve borax Finally, it is added together with the fine powder of fused magnesia, and finally sodium hexametaphosphate, sodium tripolyphosphate, silicon micropowder, slaked lime, light calcium carbonate, carboxymethyl cellulose are added, and the material is fully mixed and stirred evenly before discharging. The finished product is obtained after inspection and packaging.

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Abstract

The invention relates to a novel RH gunning refractory belonging to the refractory material field. The gunning refractory comprises the following raw materials in weight percent: 50-60% of fused magnesite crude powder, 15-30% of fused magnesite fine powder, 10-255% of chrome ore, 0.5-2% of slaked lime, 1-5% of light calcium carbonate, 1-4% of sodium hexametaphosphate, 2-55% of borax, 2-4% of silica powder, 0.5-4% of sodium tripolyphosphate and 0.005-0.1% of carboxymethylcellulose; and the raw materials are evenly mixed in a stirring device to obtain a finished product. The RH gunning refractory prepared from the raw materials provided by the invention is low in production cost, resistant to erosion and good in impermeability; an RH insert tube after being subjected to gunning maintainmentcan be used more than 85 times and the RH insert tube can be used for 5-6 furnaces after every time of gunning maintainment; the service life of the RH insert tube is obviously prolonged and the production efficiency is greatly improved; and in the use process, no harmless gas gives out, no peculiar smell is produced and no thick smoke is generated; and therefore the novel RH gunning refractory completely meets specified environmental indexes and utilization requirements..

Description

technical field [0001] The invention relates to an RH gunning material, in particular to an RH gunning material for the outer lining of an insertion pipe, and belongs to the field of refractory materials. Background technique [0002] RH is a circulating vacuum degassing device for molten steel. Argon gas is blown into one of the two dipping tubes to suck the molten steel from the ladle into the vacuum tank, and the other tube drains the molten steel from the vacuum tank to the ladle. Inside, the cycle vacuum degassing treatment is carried out. The outer lining of the RH insertion pipe is mainly casted with corundum refractory castables. Before the gunning technology was adopted, although good results were achieved, there were still some problems as follows: 1. Poor corrosion resistance and permeability resistance; 2. The service life is not high, generally about 65 times, it is forced to go off the assembly line, which not only wastes materials, but also affects the furthe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/047C21C7/10
Inventor 何金勇蒲芝明许华林
Owner 攀枝花市银江金勇工贸有限责任公司
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