Abstract

By laboratory coking and experimental industrial coking, it is found that increasing the content of gas coal in the coking batch from 25 to 35% decreases the yield of blast-furnace coke and also its mechanical strength (M₂₅, M₁₀) and its hot strength CSR. Along with decrease in coke strength, its content of the >80 mm class declines and the contamination with the <25 mm class increases. In addition, the yield of all the basic coking byproducts (tar, raw benzene, ammonia, hydrogen sulfide, coke-oven gas) increases. After the coking of batch with increased gas-coal content, no disruption of the refractory lining or graphitization is noted. When blast-furnace coke produced from batch with elevated gas-coal content is used, the mean consumption of skip coke, blast-furnace coke, and coke nuts is increased. The oxygen concentration in the blast and the natural-gas consumption are slightly decreased. Economic calculations show that the decrease in cost of 1 t of hot metal associated with decrease in cost of the coking batch is $8.40.

中文翻译：

---

Azovstal钢铁厂气煤含量提高的间歇式炼焦

摘要

通过实验室焦化和实验工业焦化，发现将焦化批料中的气煤含量从25％提高到35％会降低高炉焦炭的收率，并降低其机械强度（M ₂₅，M ₁₀）和热强度CSR。随着焦炭强度的降低，其> 80 mm级的含量下降，而<25 mm级的污染增加。此外，所有基本焦化副产物（焦油，粗苯，氨，硫化氢，焦炉煤气）的产率都提高了。在具有增加的煤气含量的批料焦化之后，未发现耐火炉衬或石墨化的破坏。当使用由具有较高煤气含量的批料生产的高炉焦炭时，副焦炭，高炉焦炭和焦炭坚果的平均消耗量增加。高炉中的氧气浓度和天然气消耗略有减少。经济计算表明，与炼焦批的成本降低相关的1吨铁水成本降低为$ 8.40。