本文结合氧化铝生产实践,在对生产中有代表性的四种溶液添加BaO除硫试验的基础上,通过热力学计算和试验结果分析,并考虑工艺要求和经济效益,认为混联法氧化铝生产工艺流程中,拜耳法系统净化种分母液,烧结法系统净化熟料溶出粗液,并采取二段部分溶液开路添加BaO除硫的方法,具有实际应用价值,尤为老厂的采用开创了广阔前景。 Based on the practice of alumina production, based on the desulfurization test of BaO with four representative solutions in production, through thermodynamic calculation and analysis of test results, considering the technological requirements and economic benefits, it is considered that the alumina production by the hybrid method In the process, the Bayer process system purifies the seed mother liquor, and the sintering system purifies the clinker to dissolve the crude liquid, and adopts the method that the second part of the solution is opened to add BaO to remove sulfur, which has practical application value, especially the adoption of the old plant. .