Coking blending method for controlling volatile compound content of blended coal at 28-29%

Abstract

The invention discloses a coking blending method for controlling volatile compound content of blended coal at 28-29%. The coal blending method comprises gas fat coal, fat coal, 1 / 3 coke, coke, lean coal and gas coal in different weight percents; the volatile compound content of the gas fat coal is 39-41%, the maximum fluidity is greater than or equal to 80000ddpm, and the solid-softening temperature interval is greater than or equal to 100 DEG C; the volatile compound content of the fat coal is 29-32%, the maximum fluidity is greater than or equal to 60000ddpm, and the solid-softening temperature interval is greater than or equal to 100 DEG C; the 1 / 3 coke is divided into 1 / 3 coke 1#, 1 / 3 coke 2# and 1 / 3 coke 3# according to different volatile compound contents and Y values; the coke is divided into coke 1#, coke 2# and coke3# according to different G values; the volatile compound content of the lean coal is 15-18%, and the G value is greater than or equal to 30, and smaller than or equal to 60; and the volatile compound content of the gas coal is greater than or equal to 37%, and the Y value is smaller than or equal to 13. The total proportion of the gas coal and lean coal is controlled to regulate the cohesiveness of the blended coal and effectively control the volatile compound content of the blended coal at 28-29%, thereby lowering the coal blending cost and ensuring the coke quality on the premise of ensuring the lower demand for coke yield.

Description

technical field [0001] The invention belongs to the technical field of coking coal blending, and in particular relates to a coking coal blending method for controlling the volatile fraction of blended coal to 28-29%. Background technique [0002] my country is a big country of steel production, and all iron and steel enterprises are equipped with coking plants. With the continuous fluctuation of the steel market, most enterprises will effectively control the output of pig iron. In order to save costs, the output of coke must be balanced with the output of pig iron. The method of controlling coke production is accomplished by controlling the volatile content of blended coal. If it is necessary to increase the coke output, then reduce the volatile matter of the blended coal; on the contrary, if it is necessary to reduce the coke output, then increase the volatile matter of the blended coal. [0003] The raw material for coke production, that is, blended coal, is a combinatio...

AI Technical Summary

Problems solved by technology

[0004] Although the method of controlling the volatile content of blended coal is relatively simple and direct, due to the complex quality of coking coal, other process properties of coking coal with the same volatile content may be quite different. If only the ratio of high and low volatile coking coal Adjustment to achieve the purpose of adjusting the volatile content of blended coal, ignoring other process properties of coking coal, although the coke output can be controlled, but the coke quality will fluctuate greatly, which will have a great impact on the smooth operation of the blast furnace, and the gain outweighs the gain