Method for mixing uniformly and crushing coke powder

Abstract

The invention provides a method for mixing uniformly and crushing coke powder. The coke powder comprises first-particle size coke powder, second-particle size coke powder and third-particle size cokepowder. The method for mixing uniformly and crushing the coke powder comprises the following steps: mixing the first-particle size coke powder and the second-particle size coke powder according to a first preset ratio, then crushing into fourth-particle size coke powder; adding the third-particle size coke powder into the fourth-particle size coke powder according to a second preset ratio to formfifth-particle size coke powder, wherein the particle size composition of the fifth-particle size coke powder is as follows: 71.3% of the coke powder with the particle size of 0-3mm, 20.5% of the cokepowder with the particle size of 3mm-5mm and 8.2% of the coke powder with the particle size being greater than 5mm. According to the technical scheme adopted by the invention, three types of coke powder are put into tanks by class and are mixed and crushed in proportion, so that the particle sizes and the components of the coke powder are uniform and controllable during using, and the stability of the FeO content of sintered ore is further improved.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for mixing and crushing coke powder. Background technique [0002] At present, in the metallurgical industry, sinter is obtained by burning coke powder. There are three sources of coke powder, one is self-produced CDQ coke powder (55%), the other is purchased coke powder (35%), and the third is coke powder in the coking process. Dedusting ash and precipitated coke powder (5%), such as figure 1 As shown, the three kinds of coke powders are not sieved, mixed and received, mixed and crushed. The particle size and calorific value of the processed coke powders are greatly affected by the incoming materials, and the composition and performance are unstable, resulting in increased solid fuel consumption in the sintering process. The content of FeO fluctuates greatly, which has a great impact on the sintering process. Contents of the invention [0003] The present inventi...

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Problems solved by technology

[0002] At present, in the metallurgical industry, sinter is obtained by burning coke powder. There are three sources of coke powder, one is self-produced CDQ coke powder (55%), the other is purchased coke powder (35%), and the third is coke powder in the coking process. Dedusting ash and precipitated coke powder (5%), such as figure 1 As shown, the three kinds of coke powders are not sieved, mixed and received, mixed and crushed. The particle size and calorific value of the processed coke powders are greatly affected by the incoming materials, and the composition and performance are unstable, resulting in increased solid fuel consumption in the sintering process. FeO content fluctuates greatly, which has a great impact on the sintering process

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