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Development and application of antifouling slag spraying material for converter
Feb 09, 2018

In the smelting process of the converter, splashing often occurs. During the process of falling, the temperature of the molten high-temperature spout of the converter gradually decreases and the viscosity gradually increases, thereby adhering to parts of the converter mouth, the furnace cap and the water tank, The continuous accumulation and expansion of sticky slag will ultimately lead to sticky slag problems at the converter mouth. Domestic and foreign scholars carried out a series of researches on the slag sticking problems of converter from the special equipment for removing sticky slag from converter mouth, the technology of separating sticking residue from sticky slag and the treatment of sticky slag.

Wuhan Iron and Steel Company scholars choose the magnesia refractories brick waste as the main raw material, sintered magnesia as a fine aggregate, fused magnesia and silicon carbide, graphite, silica and α-Al2O3 fine powder as powder, alumina cement As curing agent, sodium hexametaphosphate as binder, calcium lignosulfonate as water-reducing agent and polypropylene fiber as anti-detonation agent. Through experimental research, low cost, good segregation effect of dregs and easy slag removal were achieved. Slag spray material. Through industrial tests and applications, the number of slag removal per kiln mouth reduced from 2-3 to 1-2 times, slag cleaning time from 15-30min each time down to 10-15min, increased furnace slag residue The cleaning efficiency, reducing non-production hours.