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熔炼煤的有效热值、成分、热稳定性是影响Corex流程的首要因素,直接决定了煤耗、焦耗、还原气利用率以及固定床的高度。具有较高有效热值的主体熔炼煤对降低煤耗至关重要。含氢量在热力学方面使还原气利用率降低,在动力学方面使利用率提高,因此熔炼煤含氢量应适中。COREX流程需要使用一定比例的焦炭来补充燃料有效热值的不足并形成一个含有碳素的固定床来发展高温反应,为了减少焦炭的用量,熔炼煤还必须具有一定的热稳定性来形成一个稳定的固定床。
The effective heat value, composition and thermal stability of the smelting coal are the primary factors affecting the Corex process, which directly determines the coal consumption, the coke consumption, the utilization of the reducing gas and the height of the fixed bed. The main smelting coal with higher effective heating value is crucial to reduce coal consumption. The hydrogen content reduces the utilization of reducing gas in terms of thermodynamics and improves the utilization rate in terms of kinetics, so the hydrogen content of the smelting coal should be moderate. COREX process requires the use of a certain percentage of coke to supplement the lack of fuel effective heating value and the formation of a fixed bed of carbon to develop high temperature reaction, in order to reduce the amount of coke, the coal must also have some thermal stability to form a stable Fixed bed.