Material sequence control method applied to high-proportion pellet smelting

Abstract

The invention discloses a material sequence control method applied to high-proportion pellet smelting. The material sequence control method comprises the following steps that the feeding starting time, the feeding total time length and the first second flow of each furnace charge in N furnace charges are set according to the N furnace charges required by the smelting and the addition amount of each furnace charge, so that material strips of pellets on a feeding belt completely fall into the material strips of a sintered ore, and the coverage rate is 85% or above; the feeding sequence of the Ntypes of furnace charges is controlled in that timing is carried out by taking the moment when feeding is started in the smelting as a starting point, and when the timing reaches the feeding startingmoment of the ith type of furnace charge in the N types of furnace charges, the ith type of furnace charge is fed to a feeding belt at the first second flow aiming at the ith type of furnace charge; and when the total feeding duration corresponding to the ith furnace burden is reached, feeding is stopped. According to the method, the stable distribution of the gas in the furnace can be prevented from being influenced by the difference between the pellet ore and the sintered ore in physical, chemical and metallurgical properties and the like, so that the distribution of the gas in the furnace is more stable.

Description

technical field [0001] The invention relates to the technical field of blast furnace smelting, in particular to a material sequence control method applied to high-proportion pellet smelting. Background technique [0002] At present, the raw material structure of blast furnace smelting is mainly sintered ore. The proportion of sintered ore in the raw materials of most domestic blast furnaces is more than 65%, and the proportion of sintered ore in some blast furnaces reaches 80-90%. Only a small amount of raw materials are added to the furnace Pellets and raw ore mainly take advantage of the advantages of sinter in terms of material sequence control, and a small amount of pellets and raw ore are mainly to adjust the slag alkalinity and composition to achieve complementary chemical properties. [0003] Based on the advantages of pellets in environmental protection and low consumption, high-proportion pellet smelting has become the development trend of blast furnace smelting. A...

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Problems solved by technology

[0004] The embodiment of the present application provides a material sequence control method applied to high-proportion pellet smelting, which solves the impact of the difference in performance of the two materials, pellet ore and sinter, on blast furnace smelting during the high-proportion pellet smelting process , especially technical issues that affect the stable distribution of gas in the furnace

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