A method for shortening the roasting time of pellets

Abstract

The invention discloses a method for shortening the pellet calcinating time. The method for shortening the pellet calcinating time comprises the steps that a, bentonite and ore powder are added into a mixer and are mixed for five minutes by the mixer; b, half of the mixture obtained after mixing is added into a disc pelletizer, a calcium permanganate solution with the mass content ranging from 1% to 2% is added after the disc pelletizer is started, and the remaining mixture is added into the pelletizer gradually after mixture mother pellets appear in the pelletizer; c, after green pellets are produced, the green pullets are taken out and are placed in a corundum crucible, the corundum crucible containing the green pullets is placed in a pre-heating furnace, and the pullets are transferred into a pullet calcination furnace to be calcinated after being pre-heated for 45 minutes; d, the pullets are taken out after being calcinated to be placed in air to be cooled. Compared with an existing pullet calcinating method, the method has the advantages that due to the fact that calcium permanganate is added to water for producing the green pullets, the degree of oxidation of the pullets is improved through oxygen released when calcium permanganate is decomposed during calcinations, calcination time is shortened, and the yield of the pullets is increased accordingly.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a method for shortening the roasting time of pellets. Background technique [0002] In the field of iron and steel metallurgy technology, water is sprayed on the ore powder in the pelletizer when the roasted pellets are made into pellets. The degree of oxidation of the roasted pellets is not high, the roasting time of the pellets is long, and the increase in pellet production is not high. Addition of other ingredients can easily affect the quality and performance indicators of the pellets. Contents of the invention [0003] The purpose of the present invention is to provide a solution to the above problems, by adding calcium permanganate in the water added when making green pellets, the oxygen released by the decomposition reaction of calcium permanganate in the roasting process can improve the quality of roasted pellets. Oxidation method. [0004] In order ...

AI Technical Summary

Problems solved by technology

[0002] In the field of iron and steel metallurgy technology, water is sprayed on the ore powder in the pelletizer when the roasted pellets are made into pellets. The degree of oxidation of the roasted pellets is not high, the roasting time of the pellets is long, and the increase in pellet production is not high. Adding other ingredients can easily affect the pellet quality and performance indicators

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