干熄焦循环气体对焦炭烧损的影响分析

Influence and Analysis of CDQ Cycle Gas on Coke Burning Loss

从空气导入量、循环气体中CO浓度的控制范围、CO2高温下与焦炭的反应能力等方面分析了循环气体各成分对焦炭烧损率的影响,循环气体中O2、CO、CO2的浓度均对焦炭烧损有显著的影响,尤其是CO2在温度高于730℃时对焦炭的烧损率有直接的促进作用,发生碳溶反应。并通过焦炭烧损率小型试验进行了确认,提出了在生产过程中可通过采用减小空气导入量、适当提高循环气体中CO浓度、降低CO2浓度以及洗涤脱碳等预防控制措施,降低焦炭烧损率和提高焦炭产量。

The paper analyzed the components of CDQ cycle gas on coke burning loss from some aspects such as the input of air volume, controlling the CO concentration in cycle gas, the reaction capacity between CO2 and coke in high temperature. The conclusion was educed that the O2, CO, CO2concentration in cycle gas had a distinct influence on coke burning loss, especially that the oxide gas CO2 had a simulative action on coke burning loss when the temperature was higher than 730 ℃, and the coke was melting. We also made a pint-sized experiment to ensure the conclusion and took some preventive and control measures such as decreasing the input of air volume, increasing the CO concentration and depressing the CO2 concentration in cycle gas and washing decarburization, it could depress the coke burning loss and improve the coke output.