Carbon-containing gunning mix for hot-state gunning mix of converter as well as preparation method and using method of carbon-containing gunning mix

Abstract

The invention relates to a carbon-containing gunning mix for hot-state gunning mix of a converter. The carbon-containing gunning mix is prepared from the following raw materials in parts by weight: 85-90 parts of magnesia or calcium magnesite, 3-7 parts of instant powder sodium silicate, 4-10 parts of 90% carbon source, 2-5 parts of silicon oxide micropowder and 0.5-1.5 parts of hydroxyl carboxylate, wherein the magnesia or calcium magnesite is respectively machined into 25-35 parts of powder with the granularity of being more than or equal to 3mm and less than or equal to 1mm, 40-50 parts of powder with the granularity of being more than 1mm and less than or equal to 0.088mm and 20-30 parts of powder with the granularity of being more than 0m and less than or equal to 0.088mm. Compared with the prior art, the carbon-containing gunning mix has the beneficial effects that the construction process is simple and the working efficiency is improved; the adhesive rate reaches more than 90 percent, the waste to refractory materials is reduced, the service life is prolonged, the risk if adding phosphorus to molten steel is eliminated, the purity of the molten steel is greatly improved, and meanwhile, the damages of P2O5 to the environment, equipment and operators are also effectively avoided.

Description

technical field [0001] The invention relates to the technical field of converter gunning repair, in particular to a carbon-containing gunning material used for hot gunning of a converter and a production method and use method thereof. Background technique [0002] In the traditional steelmaking process, subsidized bricks are mostly used for repairing the lower slag line and trunnion of the converter, which is labor-intensive and has certain safety risks, and the repairing effect cannot meet the steelmaking requirements. The gunning material is 20 A high-tech product of the first century, instant bricks in steelmaking furnaces replace bricks, and are ideal substitutes for subsidized bricks for converters. In order to ensure their high-temperature strength, ordinary gunning materials are mostly combined with phosphates. In the process, P2O5 will be decomposed and separated, which will not only cause harm to the environment, but also cause the risk of increasing phosphorus in t...

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Problems solved by technology

[0002] In the traditional steelmaking process, subsidized bricks are mostly used for repairing the lower slag line and trunnion of the converter, which is labor-intensive and has certain safety risks, and the repairing effect cannot meet the steelmaking requirements. The gunning material is 20 A high-tech product of the first century, instant bricks in steelmaking furnaces replace bricks, and are ideal substitutes for subsidized bricks for converters. In order to ensure their high-temperature strength, ordinary gunning materials are mostly combined with phosphates. In the process, P2O5 will be decomposed and separated, which will not only cause harm to the environment, but also cause the risk of phosphorus increase in molten steel, which will seriously affect the purity of molten steel, and then affect the quality of tapping

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