Method for improving drum index of vanadium-titanium magnetite sinter

Abstract

The invention discloses a method for improving the drum index of vanadium-titanium magnetite sinter. A sinter mixture of the vanadium-titanium magnetite sinter comprises 65-68 percent by weight of vanadium-titanium magnetite concentrate powder, wherein the moisture content in the sinter mixture is reduced to 6.3-6.5 percent by weight, the sintering air volume is reduced to 93-95m<3> / <m2>, and the fixed carbon content in the sinter fixture is reduced to 2.5-2.7 percent by weight. The method disclosed by the invention has the advantages that a large change is not made to the overall sintering process, only are control indexes, such as moisture content and fixed carbon content in the sinter mixture and sintering air volume optimized, and the technical effect that the drum strength of the sinter is improved to above the level required by a blast furnace is achieved under the sintering condition of high vanadium-titanium magnetite sinter rate.

Description

technical field [0001] The invention belongs to the technical field of iron ore powder sintering, and more specifically relates to a method for increasing the drum index of vanadium-titanium sintered ore in a sintering process with a relatively high vanadium-titanium iron ore concentrate powder rate. Background technique [0002] Sinter is the main raw material for blast furnace ironmaking. Drum index is an important index to measure the quality of sinter. This index is used to measure the mechanical strength of sinter and express the impact and wear resistance of sinter. Drum index The higher the sinter, the better the strength of the sintered ore, and the stronger its ability to resist impact and wear during transportation. Therefore, when it enters the blast furnace for smelting, it has good air permeability and uniform particle size, thus ensuring good smelting conditions for the blast furnace and improving Improve the blast furnace utilization factor and reduce smelting...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the decrease in the strength of the sinter drum, the increase in the pulverization rate and the increase in the amount of returned ore after increasing the ratio of vanadium-titanium-iron concentrate powder in the sintering mixture, which causes poor air permeability in the blast furnace and sintering return A method for increasing the defects of increased process costs and improving the drum index of vanadium-titanium sintered ore

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