Method for adjusting heating system of coke oven after increasing gas coal and/or lean coal proportioning

Abstract

The invention discloses a method for adjusting a heating system of a coke oven after increasing gas coal and / or lean coal proportioning. The adjusting method comprises the steps of 1) determining a basic coking coal type and a coal proportioning ratio thereof; 2) determining basic heating standard temperature and basic heating time; 3) determining an actual coking coal blending ratio; and 4) determining actual heating standard temperature and actual heating time, specifically, keeping the heating standard temperature unchanged and prolonging the coking time by 1.5-2.5 minutes when the sum of the blending proportions of the gas coal and the lean coal in the blended coal is increased by 1%. According to the coal quality characteristics of each coal type in the blended coal, the specific requirements of the thermal conditions required by the coking process of the specific coal type are met in a targeted manner, so that the production of the coke meeting the volatile component requirementsunder the condition of low heat consumption is facilitated.

Description

Technical field [0001] The present invention belongs to the technical field of coking coal coal, and more particularly to an adjustment method of increasing gas coal and / or thin coal equivalent post coke oven heating system. Background technique [0002] Coke volatile is a marker of coke maturity, blast furnace ironmaking requires coke volatilization of less than 1.5%, and large blast furnaces are generally controlled by 1.3% or less. [0003] The furnace coal of the room-type coking is coal from gas coal, gas-sucking coal, fat coal, coking coal, and thin coal, coal, coal, coal, coal, coal, coal, coal, coal, coal, coal, coal, coal, compatible with coal. On the one hand, the coke volatility refined after different coal species is different from the same heating system; on the other hand, for large blast furnaces to realize the target of coke volatilization, different heating can be taken for different coal species. System to reduce coke energy consumption. [0004] The existing ...

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Problems solved by technology

[0004] Existing coking enterprises have formulated their own coke oven thermal systems based on industry operating experience. When the coal blending ratio is adjusted, if the volatile content of coke cannot meet the requirements, in order to ensure that the volatile content of coke produced is less than 1.3%, some Two adjustment measures, one is to increase the standard temperature of the coke oven, and the other is to prolong the coking time to carry out simmering. The adoption of these two measures is relatively blind. For example, the inventor found that for the average maximum reflectance of the vitrinite Coking with max below 1.0%, cohesion index G value ≥ 85, maximum thickness Y value of colloidal layer ≥ 20mm, Aurya expansion degree b value ≥ 80%, maximum Gibbs fluidity ≥ 5000ddpm, solid-soft interval temperature ≥ 90°C Coal, it is difficult to ensure that the volatile content of coke produced is less than 1.3% simply by prolonging the coking time for simmering

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