Hot metal pretreatment long-service-life spray gun

Abstract

The invention relates to a steel mill blast furnace hot metal pretreatment tool, in particular to a hot metal pretreatment long-service-life spray gun. The hot metal pretreatment long-service-life spray gun comprises a gun body and a vaporizing chamber positioned at the lower part of the gun body, wherein the vaporizing chamber comprises an inner side and an outer side which are formed by a heat resistant steel skeleton and a poured refractory material. The whole alloy steel structure of the vaporizing chamber is changed; heat resistant stainless steel reinforcement is welded into the skeleton and poured into the vaporizing chamber formed by the refractory material; and because the steel reinforcement is arranged in the refractory material, not in direct contact with hot metal and difficult to be ablated, the hot metal pretreatment long-service life spray gun has longer service life which commonly can reach more than 200 times and low cost, improves the service life by more than 3 times compared with the common spray gun and completely can meet the requirement of production.

Description

technical field [0001] The invention relates to a blast furnace molten iron pretreatment tool in a steel plant, namely a long-life spray gun for molten iron pretreatment. Background technique [0002] In the existing technology, when the molten iron filled with molten iron in the steel plant enters the desulfurization station, the spray gun will plunge into the molten iron in the molten iron tank on the track, and the high-pressure nitrogen will spray passivated magnesium powder to react with the sulfur in the molten iron. Purify the molten iron to produce high-purity alloy steel and high-quality steel. The molten iron desulfurization spray gun is composed of the gun body and the gasification chamber at its lower part. The gasification chamber is processed by alloy steel. After processing, it is welded into one body and then molded in a special mold with castables. It is used after baking. The outer side of the gasification chamber is protected by refractory materials, and ...

AI Technical Summary

Problems solved by technology

The outer side of the gasification chamber is protected by refractory materials, and the inner side is in direct contact with high-temperature molten iron. The disadvantage is that the alloy steel gasification chamber is often burned out due to frequent contact with high-temperature molten iron at about 1400 ° C. At about 60 times, the life is short and the cost is high, which cannot meet the production needs

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