摘要:
采用攀枝花钛精矿冶炼钛渣,其吨渣电耗均高于国际先进冶炼技术的电耗,若对攀枝花钛精矿进行预还原处理后冶炼钛渣,其电耗得到大幅度的降低。根据已开展的工业试验基本数据,结合采用钛精矿、还原剂的主要成分,测算了不同金属化率钛精矿预还原球团的化学成分。在此基础上,通过热力学计算,测算了不同金属化率钛精矿预还原球团在室温和800℃热装入炉时冶炼钛渣的电耗。结果表明:钛精矿预还原是降低钛渣冶炼电耗的有效手段,以转底炉生产的60%金属化率球团代替粉矿入炉,吨渣电耗由2 800 kWh降为1 948.5 kWh,800℃热装条件下可进一步降至1 523.1 kWh,具有良好的应用前景。
关键词:
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钛渣 /
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钛精矿 /
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预还原 /
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金属化率 /
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电耗
Abstract:
Electricity consumption for titanium slag smelting with Panzhihua titanium concentrates is higher than that of the international advanced smelting technologies.However,it can be significantly reduced as prereduced Panzhihua titanium concentrates are used for the smelting.According to basic data obtained in industrial tests that have been carried out,combined with the main components of titanium concentrates and reducing agents,the chemical compositions of prereduced concentrate pellets with different metallization ratio are tested and calculated.On this basis,through thermodynamic calculation,electricity consumption for the smelting with the prereduced pellets charged into furnace at room temperature or 800℃ are calculated.The results show that prereduction of titanium concentrates is an effective way to reduce the electricity consumption of slag smelting.As the pellets with a metallization ratio of 60% instead of fine ores are charged into the furnace,the electricity consumption for smelting 1 metric ton of titanium slag is reduced from 2 800 kWh to 1 948.5 kWh.As they are charged at the temperature of 800℃,it can be further reduced to 1 523.1 kWh,which shows a good application prospect.
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