硫酸法钛白粉中连续酸解技术研究.pdf

化工设计通讯 研究与开发 第45卷第7期 Chemical Engineering Design Communications Research and Development 2019年7月 硫酸法钛白粉中连续酸解技术研究 曲总更 ，轮盈盈 （山东道恩钛业有限公司 ，山东龙口 265700 ） 摘 要：连续酸解工艺技术在硫酸法钛白粉生产中可以有效提升废酸的利用率 ，减少废酸和废气的排放 ，是钛白粉工业实 现清洁生产的技术趋势 。通过对钛渣和钛铁矿酸解过程中化学反应热的分析 ，通过热量补偿 ，实现了以钛渣和钛铁矿混合物作 为钛原料的连续酸解技术 。研究了钛原料预混比 、预混温度 、预热温度 、反应酸浓度 、酸料比及熟化时间对酸解反应的影响， 获得连续酸解技术的最佳工艺参数 。以最佳工艺进行了连续酸解稳定性试验 ，其酸解率更加稳定 ，酸解率高出间歇式酸解技术 2.7%,得到了质量稳定的钛液产晶 ，连续酸解技术工艺能耗低 、环保 ，具有广阔的工业应用前景。 关键词 ：硫酸法钛白粉 ；连续酸解 ；酸解率 中图分类号：TQ621.12 文献标志码：B 文章编号 ：1003-6490 (2019) 07-0153-02 Study on Continuous Acidification Technology of Titanium Dioxide by Sulfuric Acid Method Qu Yi-chen, Zhang Ying-ying Abstract : Continuous acidolysis technology can effectively improve the utilization rate of waste acid and reduce the emission of waste acid and waste gas in the production of titanium dioxide by sulfuric acid method, which is the technical trend of realizing clean production in titanium dioxide industry.In this paper, the continuous acidification technology using titanium slag and ilmenite mixture as titanium raw material is realized by analyzing the chemical reaction heat in the acidification process of titanium slag and ilmenite and compensating the heat.The effects of pre-mixing ratio of titanium raw materials, pre-mixing temperature, preheating temperature, reaction acid concentration, acid material ratio and aging time on acidolysis reaction were studied.The optimum technological parameters of continuous acidolysis technology were obtained.The acidolysis stability test of continuous acidolysis was carried out with the optimum technology.The acidolysis rate was more stable than that of batch acidolysis technology.2.7% of the acidolysis rate wa