Slim slab low carbon steel special for continuous casting crystallizer protected slag and production processes with same

Abstract

The invention relates to a metallurgical accessory product used for continuous casting of mild-steel thin sheet slab and relates to a premelting crystallizer covering slag technology specifically used for continuous casting of mild-steel thin sheet slab. The invention comprises premelting materials, fusing agent materials and carbonaceous materials; wherein, the fusing agent materials include Li2CO3, K2CO3, MnCO3 and NaF, etc. The manufacturing technique adopted by the invention includes of gasifying the qualified premelting materials, fusing agent materials and carbonaceous materials into a storage hopper and then carrying through microcomputer material mixing per 6T according to a specific mixture ratio for the covering slag; putting into a mixer for mixing and fetching a semi-finished product for detecting; after qualified, putting into a globe mill for dry milling; putting into an levigator to mill and produce slurry; extracting materials, spraying and granulating; packing and warehousing the qualified products. Compare with import slags, the invention has no cohesion and ingot bleeding and the manufacturing technique anterograde of the invention far exceeds that of the import slag. The invention has the advantages of few slag strips and active reaction as well as small frame in the crystallizer.

Description

technical field [0001] The invention relates to a metallurgical auxiliary material product for ultra-thin slab continuous casting of medium and low carbon steel in the field of metallurgy, in particular to a special mold slag for continuous casting of ultra-thin slab low carbon steel and its production process, which is suitable for ultra-thin slab continuous casting Casting (CSP) dedicated pre-melted crystalline mold flux technology. Background technique [0002] Low-carbon steel ultra-thin slab continuous casting and rolling is characterized by short production process, close connection between continuous casting and rolling process, maximum energy saving, low environmental pollution, high metal yield, short period from molten steel to finished product, With its advantages such as significant technical and economic benefits, a new technological change is rapidly brewing in the world metallurgical field. [0003] It has been nearly five years since Handan Iron and Steel, Z...

AI Technical Summary

Problems solved by technology

Around 2000, some domestic mold slag manufacturers began to research thin slab mold slag and applied for patents. Although the cost of mold slag for steel mills has been reduced, the quality of cast slabs (crack rate, inclusion rate greatly increased) but getting worse

However, there is still a certain gap between my country's continuous casting operation level and process management status compared with foreign countries, so the use of imported slag in my country is subject to certain restrictions