煤中混入氧化锌高温焦炉煤气脱硫行为的研究

在热力学模拟结果的基础上，利用在练变煤中添加氧化锌进行焦炉煤气均相脱硫的行为的研究。实验结果表明：在炼焦前期，煤中添加氧化锌可以有效抑制煤中硫的释放，实验所用煤样中的最佳的氧化锌添加量是理论计算所需量的1．4倍.顺炼焦后期，由于焦炉煤气中氢气的作用，半焦中硫化锌和氧化锌开始分解，气态锌和H2S随焦炉煤气的温度降低又生成硫化锌，从而实现了焦炉煤气的脱硫，而且对焦炭质量的影响很小，氧化锌的添加量的增加有利于焦炉煤气进一步的脱硫。

DESULFURIZATION OF COKE OVEN GAS BY MIXING ZnO POWDER INTO COAL

On the basis of thermodynamic simulation, behavior of H 2S removal from coke oven gas by mixing znic oxide into the coal and the effect of the additive on the coke quality have been investigated The experimental results show that in the stage when coal converts into semicoke, hydrogen sulfide concentration in COG decreases with the increase of zinc additive in coal And an optimum amount is about 40% excess of the stoichiometric amount of zinc additive needed in coal In the stage when semicoke converts into coke, hydrogen sulfide concentration in COG decreases with the increase of zinc additive in coal, the reason of which is the zinc oxide retented in the semicoke is more easier to decompose under the same condition than zinc sulfide The addtive of zinc oxide in coal has little deleterious effect on coke quality