Research of Sulfuric Acid Produced by Sintering Gas Desulfurization in Pangang Using as Raw Material in Titanium Dioxide Preparation
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摘要: 以攀钢烧结烟气脱硫制得硫酸为生产钛白的酸解原料,制备颜料钛白,并跟踪酸中有害元素在钛白生产中的走向,最终制得符合颜料钛白要求的偏钛酸,验证了烧结烟气硫酸用于钛白生产的可行性。试验结果表明,采用脱硫酸酸解钛精矿可以达到同等条件下硫磺酸的酸解率水平。脱硫酸可作为硫酸法生产颜料级钛白酸解工艺的原料,但由于脱硫酸色泽发黑不能作为硫酸法钛白洗水、包膜等工序的原料。使用脱硫酸生产钛白,产生的废酸、废水不会对环境产生危害。Abstract: Titanium dioxide was prepared,using the sulfuric acid by the sintering gas desulfurization in Pangang as the raw material of acidolysis process.The tendency and distribution of harmful elements in the acid during the titanium dioxide production were tracked and monitored,and the meta-titanic acid satisfying the requirements was eventually obtained.The feasibility of applying sulfuric acid by sintering gas desulfurization to the titanium dioxide production was verified.The results indicate that the equal level of acidolysis rate for titanium concentrate is reached by the sintering gas sulfuric acid in comparison to the sulfuric acid in laboratory.However,sulfuric acid by sintering gas desulfurization cannot be used in the processes of washing and coating in titanium dioxide production due to the black color of the acid.The waste acid and water,produced in the production of titanium dioxide by the sintering gas sulfuric acid,do not harm the environment.
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