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LF热态渣的循环利用可减少废渣排放,降低对环境的危害。对LF热态循环渣的脱硫能力及可回收性进行了分析,热态循环渣返回LF炉和转炉参与冶金反应后,可大幅降低渣料消耗,LF炉每罐回收热态循环渣1~1.5 t,平均节省石灰及其他助溶剂用量5 kg/t(钢),转炉每罐回收热态循环渣3~5 t,渣料消耗平均降低10~15 kg/t(钢)。采用热态循环渣配加石灰的LF炉造渣制度后,在相同的处理时间内,处理终点钢水中硫质量分数与常规处理几乎相同,同时节省了能源消耗,但必须考虑对钢水增硅、增锰的影响。热态循环渣返回转炉后导致入炉铁水温度低及吹炼过程渣量较大,因此转炉吹炼全程以低枪位操作更为适宜。在不影响生产组织的情况下,热态渣以返回转炉循环利用为最佳途径。
LF hot slag recycling can reduce waste emissions, reduce the harm to the environment. The desulphurization capacity and recyclability of LF hot slag are analyzed. After hot slag is returned to LF furnace and converter to participate in metallurgical reaction, slag consumption can be greatly reduced. LF slag can recover 1 ~ 1.5 t, save 5 kg / t (steel) of lime and other cosolvents on average, and recover 3 ~ 5 t of hot circulating slag per can. The average slag consumption is reduced by 10 ~ 15 kg / t (steel). In the same treatment time, the sulfur content of molten steel in the treatment end point is almost the same as that of the conventional treatment, and the energy consumption is saved at the same time. However, it is necessary to consider increasing the silicon content in the molten steel, Increasing the impact of manganese. After the hot circulating slag returns to the converter, the temperature of the molten iron in the converter is low and the amount of slag in the blowing process is relatively large. Therefore, it is more suitable for the converter to operate at low gun positions throughout the process of blowing. Without affecting the production organization, the hot slag to return to converter for the best way.