Mixed sintering ore

Abstract

The invention discloses mixed sintering ore. The mixed sintering ore is prepared by mixing the following materials: acid sintering ore with the alkalinity being 0.6 to 0.8 and alkaline sintering ore with the alkalinity being 1.8 to 2.3 according to the weight ratio of being 1:3 to 5. The mixed sintering ore is prepared by mixing the following materials: acid sintering ore with the alkalinity being 0.6 to 0.8 and alkaline sintering ore with the alkalinity being 1.8 to 2.3 according to the weight ratio of being 1:3 to 5, wherein the acid sintering ore accounts for 1 part, and the alkaline sintering ore accounts for 3 to 5 parts, due to the mixed matching, the condition that the acid sintering ore with the alkalinity being 0.6 to 0.8 can not be independently used for blast-furnace production is overcome; the average alkalinity of the mixed sintering ore is about 1.62 by measurement, and the use ratio of the sintering ore in a blast furnace can reach 88 percent to 90 percent of the use amount of iron-making materials in the blast furnace, so that the productivity of a sintering machine can be fully exerted; after the use ratio of the sintering ore is greatly increased, more benefit is brought for smooth conduction of the furnace condition, reduction of fuel consumption, improvement of technical indexes of the blast furnace and reduction of molten iron.

Description

technical field [0001] The invention relates to the field of blast furnace ironmaking, in particular to mixed sintered ore. Background technique [0002] Sintered ore is a raw material for blast furnace ironmaking. The basicity of sintered ore is the ratio of the weight of alkaline substances in sintered ore to the weight of acidic substances. When the basicity is greater than 1, the sintered ore is alkaline sintered ore. When it is less than 1, the sintered ore is acidic sintered ore. The basicity of sintered ore suitable for blast furnace ironmaking is usually 1.8~2.3. 80%; sintering ore is produced by sintering machine. When the production capacity of sintering machine is greater than the normal use of sintering ore in blast furnace, it is necessary to increase the proportion of sintering ore used in blast furnace to give full play to the production capacity of sintering machine and increase the sintering ore in blast furnace. The proportion of use in the blast furnace n...

AI Technical Summary

Problems solved by technology

[0002] Sintered ore is a raw material for blast furnace ironmaking. The basicity of sintered ore is the ratio of the weight of alkaline substances in sintered ore to the weight of acidic substances. When the basicity is greater than 1, the sintered ore is alkaline sintered ore. When it is less than 1, the sintered ore is acidic sintered ore. The basicity of sintered ore suitable for blast furnace ironmaking is usually 1.8~2.3. 80%; sintering ore is produced by sintering machine. When the production capacity of sintering machine is greater than the normal use of sintering ore in blast furnace, it is necessary to increase the proportion of sintering ore used in blast furnace to give full play to the production capacity of sintering machine and increase the sintering ore in blast furnace. The proportion of use in the blast furnace needs to reduce the basicity of the sintered ore to balance the basicity of the blast furnace slag; When this kind of sinter is used for production, it will not be conducive to improving the furnace condition and the technical indicators of the blast furnace; therefore, it is not appropriate to further reduce the alkalinity of the sinter after it is reduced to 1.75, so that the proportion of sinter used in the blast furnace cannot be further reduced. improve