摘要
密闭直流电弧炉冶炼生产钛渣利用输入电能进行加热,在高温情况下,钛精矿中的FeO和TiO2发生还原反应。反应进行程度影响熔池内渣的粘度,进而影响炉壁挂渣层的厚度和排渣排铁的难易程度,故还原反应过程必须控制输入能量使DC炉系统达到热量平衡;输入能量过高会使熔池内的渣过热,挂渣层变薄,造成炉壁腐蚀;输入能量过低,会导致渣的粘度明显增大,造成排渣困难,并产生泡沫渣。根据理论计算,每冶炼1t钛精矿需要消耗约911.55kWh的能量,云南某公司加料速率为5t钛精矿/h,钛精矿碳热还原,理论上需要消耗约4557.734kWh的电耗。能量支出方面有物料带走的物理热、炉壁和炉顶冷却水热损失、炉底风冷热损失、电力设备热损失以及少量未预见热损失,钛精矿冶炼过程中,能量的输出和输入是基本相等的,热量处于平衡状态。
Ferrous oxide and titanium dioxide were reduced by carbon under the high temperature within the dosed direct current arc furnace, which supplied heat to the reaction by electric energy. The degrees of the reaction affect viscosity of the slag in the pool ,the thickness of slag bonding lining and the difficulty of discharging slag and iron. The energy input must be controlled to balance during carbonthermic reduction. If input energy was too more,the slag bonding lining would become thinner, and result of corrosion of the furnace wall. Contrarily, if input energy was not enough, it would be responsible for the diitlcuhy of slagging and foam slag. Based on the results of the theory, DC furnace smelting process needs for 911.55kWh energy cost per ton. And a Yunnan Company smelting process needs for 4557. 734kWh energy cost when its feed rate was 5 ton ilmenite per hour. Energy outputs include physical thermal of material,thermal losses of cooling water,electrical equipment and unexpected, the energy of input and output must keep balance during the smelting process.
出处
《轻金属》
CSCD
北大核心
2011年第12期47-51,共5页
Light Metals
基金
国家科技部国际合作资助项目
项目编号2007DFA71490
关键词
直流电弧炉
钛精矿
钛渣
碳热还原
热量平衡
DC arc furnace
ilmenite
titanium slag
carbonthermic reduction
energy balance
