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在1 100~1 350℃,1 000Pa,3倍碳当量条件下,采用微波加热方法对碳还原转炉钢渣的气化脱磷反应进行了宏观动力学分析。结果表明,微波加热条件下,气化脱磷率为31.0%~35.7%,该气化脱磷反应为二级反应,活化能为55.52kJ/mol,并得到了气化脱磷反应速率常数与温度的关系式,同时界面化学反应为可能的限制性环节。通过提高反应温度、减小钢渣及焦炭粒度、增大反应物料接触面积,可提高气化脱磷反应的速率。研究结果为探明微波碳热还原脱磷反应的机理及速率问题,实现转炉钢渣在钢铁企业内部的循环利用提供了理论依据。
Under the conditions of 1 100 ~ 1 350 ℃, 1 000Pa and 3 times of carbon equivalent, the macroscopical dynamic analysis of the gasification dephosphorization reaction of carbon reduction converter steel slag was conducted by microwave heating method. The results showed that the gasification dephosphorization rate was 31.0% -35.7% under the condition of microwave heating. The gasification dephosphorization reaction was the second-order reaction, the activation energy was 55.52kJ / mol and the rate constant of gasification dephosphorization reaction was Temperature relationship, while the interface chemical reaction may be the limiting part. By raising the reaction temperature, reducing the size of steel slag and coke, and increasing the contact area of the reaction materials, the rate of the gasification dephosphorization reaction can be increased. The results provide a theoretical basis for the discovery of the mechanism and rate of the microwave carbothermal reduction dephosphorization reaction and the realization of the converter steel slag recycling in the iron and steel enterprises.