大同云岗弱黏结性煤配煤炼焦研究

Coking Research for Blending with Datong Yungang Weak Caking Coal

在对大同云岗煤基础性质研究的基础上,基于现有配煤方案,通过添加云岗煤来替代部分瘦煤、1/3焦煤或气煤进行配煤炼焦,研究了煤的细度和配比等对焦炭冷、热态强度和反应性等的影响。结果表明:云岗煤细度增加,焦炭的冷热态强度均有增加;云岗煤替代气煤,焦炭冷态强度随着配比增加先升高后减小,但热态强度下降;替代1/3焦煤及瘦煤,焦炭冷热态强度均是随着配入量的增加而减小。在配煤时增加肥煤的配入量,配入≯3%的云岗煤可以保证焦炭的质量。多用云岗煤,将有利于降低焦炭硫分和灰分,扩大炼焦煤资源,降低配煤成本。

Based on the elemental anti proximate analysis results of Dalong Yungang coal and present coal blending scheme, the coking tests for blending with Yungang coal instead of a part of lean coal, 1/3 coking coal and gas coal were carried out. The influences of the coal fineness and proportioning on the cold-status strength, hot-status strength and reactivity of coke were investigated. The main conclusions are as follows： The cold-status strength and hot-status strength increased with the increase of the fineness of Yungnng coal： With Yungang Coal instead of gas coal, the cold-status strength first increased and then decreased while hot-status strength decreased with proportioning increase; Instead of 1/3 coking coal and lean coal, the cold-status strength and hot-status strength of yoke decreased with proportioning increase of yungang coal. Increasing the mixing quantity of fat coal and not larger than 3% Yungang Coal in coal blending, the quality of coke can be guaranteed. In a word, it will be beneficial for reducing sulfur anti ash content in coke, expanding the coking coal resources, reducing the cost of coal blending.