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硫酸法钛白粉生产会产生w(H2SO4)21%、w(FeO)5.6%的废酸,如直接用于过磷酸钙生产,因FeO存在会造成硫酸输送管道堵塞,过磷酸钙结块和有效磷退化。介绍除去废酸中FeO的工艺技术,可使酸中的w(FeO)降至0.27%。几年来回收废酸(折纯100%)4.63万t,合计创效益3 240万元。
Sulfuric acid production of titanium dioxide produces w (H2SO4) 21%, w (FeO) 5.6% of the waste acid, such as directly used in the production of calcium superphosphate, because of the presence of FeO will cause sulfuric acid pipeline clogging, caking and effective superphosphate Phosphorus degradation. Describe the removal of waste acid in the process of FeO, the acid in the w (FeO) down to 0.27%. In recent years, the recovery of waste acid (pure 100%) 46,300 t, a total profit of 32.4 million yuan.