Blended iron powder using reduced iron powder for reducing cost and increasing benefits

Abstract

The invention discloses blended iron powder using reduced iron powder for reducing the cost and increasing benefits. The blended iron powder comprises, by weight, 2%-10% of reduced iron powder, 5%-25%of Brazil Carajas powder, 15%-35% of Brazil coarse powder, 15%-25% of Australian western powder, 15%-25% of Australian FB powder and 5%-25% of Indian coarse powder. According to the blended iron powder using reduced iron powder for reducing the cost and increasing benefits, the by-product, namely the reduced iron powder, generated in the direct reduced iron production process is successfully applied to sintered blended ore, a proper quantity of iron ore is added to overcome the negative factors of low assimilation temperature, poor liquid-phase fluidity, low liquid-phase strength and poor calcium ferrite generation capacity of the reduced iron powder, and thus, the application effect of the reduced iron powder is ensured.

Description

technical field [0001] The invention belongs to the technical field of ironmaking raw material preparation and sintering production, and in particular relates to an iron ore mixed powder that uses reduced iron powder to reduce costs and increase efficiency. Background technique [0002] Direct reduced iron production is a relatively mature short-process ironmaking process. At present, the world's production capacity is more than 70 million tons, mainly distributed in the Middle East and Eastern Europe, among which the Middle East accounts for nearly 50 million tons. In the production process of direct reduced iron, the powder produced by the direct reduction furnace production line that has not been completely reduced and has not formed bread iron is called reduced iron powder. This by-product has high grade (the highest grade can reach more than 80%), Less harmful impurities and other advantages. Due to the lack of sintering machine production technology in the Middle East...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an iron ore mixed powder that uses reduced iron powder to reduce costs and increase efficiency, and solve the problem of reducing the strength of sintered ore when the by-product reduced iron powder produced by the direct reduced iron process is applied to sintering production , increased return rate, poor reducibility, etc.

Images