Slag splashing method for converter high-oxidisability furnace residue

Abstract

The invention pertains to the metallurgy field and relates to a method of slag splashing for converter maintenance, in particular to a method of the slag splashing for the converter maintenance of converter high oxide slag. After steel come out from a converter, the slag is left inside the converter, a converter top oxygen lance is used for insufflating nitrogen; after the nitrogen is insufflated into the converter through the converter top oxygen lance, a slag modifier compounded by anthracite and magnesia is added into the converter, and the addition quantity of the slag modifier is: 30-100 kilograms slag modifier is added to every ton of the slag. Terminal slag of the converter ironmaking is splashed and bonded on the converter wall to form slag splashing layers. By actualizing the slag splashing for the converter maintenance of the invention, the effect of the slag splashing for the converter maintenance of the converter with high oxidation slag production when smelting the high additional value steel can be obviously improved, and the service life of a converter liner of the converter can be greatly prolonged.

Description

technical field [0001] The invention belongs to the field of metallurgy, and relates to a method for protecting a furnace by slag splashing, in particular to a method for protecting a furnace by splashing slag with highly oxidative slag in a converter. Background technique [0002] Converter steelmaking uses slag splashing to protect the furnace, which can greatly increase the life of the converter lining and reduce the cost of steelmaking. The slag splash protection method of converter slag is to leave a suitable amount of slag in the converter after the steel is tapped, and blow nitrogen with a certain pressure and flow rate into the furnace top oxygen lance to splash and stick the slag at the end of converter steelmaking. It is bound on the furnace wall to form a slag splash layer, which protects the furnace lining during the steelmaking process and prolongs the life of the furnace lining. [0003] When the converter smelts low-carbon and ultra-low-carbon steel, it is ne...

AI Technical Summary

Problems solved by technology

On the other hand, due to the low viscosity of highly oxidizing slag, the splashed slag is not easy to bond with the converter wall, and the formed slag splash layer is thin, which is not conducive to protecting the converter lining

Therefore, when the converter smelts various steels and high value-added steels, the highly oxidizing slag produced is not conducive to slag splashing to protect the furnace, and it is difficult to improve the life of the converter lining.