Production method of refractory material for desulfurization spray gun, and refractory material

Abstract

The invention provides a production method of a refractory material for a desulfurization spray gun, and the refractory material. The production method comprises the following steps: a modification process: respectively modifying and compounding a mullite component and a corundum component through graphene to obtain a mullite-graphene modified component and a corundum-graphene modified component, wherein the mullite component is a component containing 90 wt% or above of 3Al2O3-2SiO2, and the corundum component is a component containing 90 wt% or above of Al2O3; a proportioning process: adding auxiliary materials, wherein the auxiliary materials comprise fine andalusite powder, alpha Al2O3, aluminum oxide micro powder, silicon oxide micro powder, lithium lime and water; and a mixing process: stirring and mixing the added aggregate and auxiliary materials to form the refractory material for later use. Through the modification effect of graphene on aggregate, when the obtained refractory material is applied to the desulfurization spray gun, the service life of the desulfurization spray gun can be obviously prolonged; and the production method is simple in process, low in cost and suitable for continuous and industrial production.

Description

technical field [0001] The invention relates to a refractory material and a processing method, in particular to a production method of a refractory material for a protective coating used in a desulfurization spray gun used for desulfurization of molten steel and the related refractory material obtained. Background technique [0002] The desulfurization spray gun is one of the components of the molten iron pretreatment equipment and an important bridge connecting steelmaking and blast furnace. It is a technological means to improve the quality of steel products, expand the variety of steel products, reduce costs and optimize the steelmaking process. [0003] Specifically, the desulfurization spray gun can be used as a tool for powder spraying and desulfurization outside the furnace for the preparation of molten iron, and its main components include two parts: the gun shaft and the gun body. The role of the gun rod is to complete the connection with the desulfurization inject...

AI Technical Summary

Problems solved by technology

[0004] Due to the very harsh working conditions of the desulfurization spray gun, it is often necessary to repeatedly heat molten iron at a temperature above 1300 ° C. In the case of heating, very high requirements will be placed on the performance of the refractory material. If the performance of the refractory material is not good, then use After several times, the temperature difference between the inside and outside of the spray paint will be very large. Under this very large gradient temperature difference, the spray gun will be subjected to very large thermal stress. Generally, cracks will form in refractory materials at this time, and such gaps occur Afterwards, this refractory material may no longer be usable, and a new spray gun needs to be replaced

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