攀钢含钛高炉渣资源化再利用进展

Resource Recycling progress of Panzhihua Titanium Bearing Blast Furnace Slag

我国钒钛磁铁矿资源储量惊人,已探明储量接近百亿吨,其中攀西地区钛储量占全国已探明储量的90%以上,占世界已探明储量的40%,钒钛磁铁矿的开发冶炼对我国战略金属资源的利用有着举足轻重的意义。攀钢高炉冶炼钒钛磁铁矿产生了大量的含钛高炉渣,含钛高炉渣是宝贵的二次资源,综合利用是解决含钛高炉渣大量堆积造成环境污染、资源浪费问题的根本方法。从火法提钛和湿法提钛两方面总结了攀钢含钛高炉渣提钛工艺的研究进展。火法提钛工艺主要包括高温碳化-低温选择性氯化技术、合金化提取工艺、选择性析出分离技术;湿法提钛工艺主要包括硫酸法、盐酸法;以及NaOH熔融焙烧-水浸提钛技术、Na2CO3焙烧富集法和硫酸铵熔融焙烧法等其他提取方法。分析了各自工艺的反应机理和工艺流程,论述了工业应用中的各自特点以及目前存在的主要问题,并指出钛的分离效率高、设备处理量大、二次污染小、经济总体上合算的四大未来主要研究方向,对攀钢含钛高炉渣提钛研究进行展望,不断推进攀钢含钛高炉渣的资源化再利用进程。

China＇s vanadium titanium magnetite resource reserves amazing, has proven reserves of nearly 10 billion tons,, among which the Panxi titanium reserves accounted for more than 90% of the country＇s proven reserves, and 40% of the world＇s having been proven. It has great significance to the strategic use of metal resources in China＇s development of smelting vanadium titanium magnetite. Titanium-bearing blast furnace slag is a valuable secondary resource. The comprehensive utilization is the fundamental method to solve the problem of environmental pollution and waste of resources caused by the accumulation of titanium- bearing blast furnace slag. The extraction processes of Panzhihua titanium bearing blast furnace slag are summarized in two aspects of pyrometallurgical and hydrometallurgical. The process of pyrometallurgical mainly includes high-temperature carbonization-low temperature selective chlorination, alloying extraction and selective precipitation and separation. The hydrometallurgical extraction includes sulfuric acid and hydrochloric acid, and other extraction methods such as NaOH melting roasting-water leaching titanium technology, Na2CO3 roasting enrichment method and ammonium sulfate melting roasting method. The reaction mechanism and technological process of each process were analyzed, and the characteristics and the main problems in the process were discussed. And it points out the high separation efficiency of titanium equipment, large capacity, low pollution, cost-effective two overall economic four future research direction. The prospect of the research progress of Panzhihua titanium and continuously promotes resource recycling process of Pangang blast furnace slag. Panzhihua Iron and steel smelting V-bearing titanomagnetite in blast furnace produce a large number of the secondary resource of containing titanium blast furnace slag, comprehensive utilization of blast furnace slag is the basic method to solve the environmental pollution and waste of resources. The extraction processes of Panzhihua titanium bearing blast furnace slag are summarized in two aspects of pyrometallurgical and Hydrometallurgical, the characteristics of each process and existing main problems are analysed, and the research direction in the future is pointed out, continue to promote resource recycling process of Pangang blast furnace slag.