A solid cooling medium for casting

Abstract

The invention discloses a solid cooling medium for casting and belongs to the technical field of casting. According to the solid cooling medium, the addition amount of an anti-sintering agent is 15-18% of that of solid filler; the solid filler consists of chromite sand, alumina powder, magnesium oxide, zirconite, alkali-free glass fibers, blast furnace dust, converter air-granulated slag and antimonous oxide; the anti-sintering agent consists of a passivating agent and an exciting agent in the mass ratio of 100:(20-24), the passivating agent consists of aluminium powder, perlite powder, graphite powder, lime powder, silicon carbide powder and coal ash, and the exciting agent consists of silica micro-powder, rutile titanium dioxide and sulphonated phenolic resin. During casting of a cast steel cooling wall, the solid cooling medium contained in a cooling water pipe of the cast steel cooling wall can be effectively prevented being partially sintered, and the cast steel cooling wall can realize technical effects that the wall is fused but not molten and is fused seamlessly.

Description

technical field [0001] The invention relates to the technical field of casting, and more specifically relates to a solid cooling medium for casting. Background technique [0002] A large number of staves are used in iron-making blast furnaces. Compared with the currently widely used ductile iron staves, cast steel staves as a new generation of blast furnace staves have high elongation, high tensile strength, high melting point, and thermal shock resistance. Good performance and good overall thermal conductivity. The material of the cast iron stave base and the cooling water pipe is very different. Due to the limitation of the base material and casting process, there is an air gap of 0.1-0.3 mm between the base and the cooling water pipe, resulting in an increase in thermal resistance. However, the cast steel stave matrix and the cooling water pipe are made of the same or similar material. The special casting technology makes the outer wall of the cooling water pipe and the ...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the difficulty in achieving the effect of "melting without piercing" in the casting process of cast steel staves in the prior art, and the solid cooling medium often partially sinters during the pouring process, resulting in difficult casting quality of cast steel staves. To effectively control the deficiencies, a solid cooling medium for casting is provided. By adopting the technical scheme of the present invention, during the casting process of the cast steel stave, it can effectively prevent the solid cooling inside the cooling water pipe of the cast steel stave. Partial sintering of the medium can make the cast steel stave achieve the technical effect of "melting without melting" and "seamless fusion"