Titanium dioxide production process

 Clean production processes molten salt process domestic Chinese Academy of Sciences led by Professor Qi Tao, can be used for the production of titanium dioxide concentrate, can also be recovered sulfuric acid solution of titanium dioxide slag (Heini), has completed the titanium dioxide in Shandong Dong Jia Group industrial test production process. The company is now the second largest manufacturer of titanium dioxide Cristall (Cristal) in associated companies during the original Murray had invested $ 1.5 million, research and patented by the University of Leeds professor ProfJha green extraction process, the method with a base and ilmenite ore roasting at 850 ~ 875 ℃, and then using the organic acid leaching, to remove the impurities, the titanium compound yield obtained was 95% to 97% of synthetic rutile, the product particle size between 150 ~ 300m; calcium content of 0.3%, an iron content of 1% to 1.5% and an aluminum content of 0.5% or less. For the chloride process titanium dioxide production is less than 20 times than the traditional chlorine consumption. Due to many factors, liquid-liquid separation, solvent extraction causes the project failed to do so, there is no commercial production. There molten salt production process, the process by alkali fusion decomposition of titanium raw material, acid hydrolysis precipitate calcined titanium dioxide production. These newly developed technology due to plant equipment or materials, the entire life-cycle carbon footprint very perfect, and even economic problems, did not achieve commercial production unit. Therefore, the existing global titanium dioxide production technology, it still remains in the classic two sulfuric acid and chloride production process; but with the progress of society, the classic sulfate process and chloride due to the development of science and technology is also continuous improvement and perfection, in addition to past environmental, health, safety (EHS), but also need to meet with the social development of ecological civilization requires a new "low carbon" and "sustainable development". Titanium dioxide production technology since 1916 sulfuric acid process titanium dioxide production process, wen the last century until 1958, the chloride process plant operation, titanium dioxide production process of the development of the sulfuric acid method has experienced nearly a hundred years, chlorination also Fast experienced 60 years. Because elemental fluorine is easier than elemental chlorine reacts titanium titanium fluoride, there have been some US companies have done a lot of research fluorination technology, and the technological development and production of experimental device, especially hydrogen fluoride because fluoride Hazard and safety of people and the environment than the larger and had to abandon chlorination development of this process. The century beginning April 23, 2002, the United States 俄特尔纳米 Materials (AltairNanomaterialsInc.) Applied for a patent (10-11). The process that is different from the sulfuric acid production process, but also from the chloride process. Sulfuric acid is sulfuric acid decomposition of titanium raw material, then precipitated metatitanic and liquid-solid separation, and calcined production of titanium dioxide (mainly in solid-liquid separation); chlorination method is based on the decomposition of titanium raw material to generate chlorine gas chloride, followed by gas-solid and gas-liquid separation and gas-phase oxidation production of titanium dioxide (gas-solid separation based). E Teer company is hydrochloric acid decomposition of titanium raw material, then the volume of extraction (liquid-liquid separation) and the production of titanium dioxide precipitation and calcination process after pyrolysis, so that the hydrochloric acid production process. Titanium dioxide production process: hydrochloric acid leach ilmenite decomposition, separating the insoluble residue; leaching liquid ferric iron reduced to lower, cooling and crystallization of ferrous chloride, ferrous chloride separated; isolated chlorination iron-containing titanium leaching solution for the first time after the solvent extraction, extraction phase containing titanium and high-speed solution, raffinate aqueous solution containing ferrous and returned to the process for the regeneration of hydrochloric acid, returned to the leaching process; titanium The extract phase was extracted a second time, the titanium-containing aqueous phase is extracted, the aqueous raffinate phase containing a high iron, hydrochloric acid regeneration step returns; titanium chloride solution after extraction the purified hydrolysis, the hydrolysis is preferably heated spray hydrolysis to give metatitanic, hydrochloric acid and water vapor return hydrochloric acid regeneration system. Metatitanic hydrolyzed calcined, wet, inorganic coated, filtering and washing, drying, steam is the product powder and packaging. This article comes from http://www.lfqcyl.com/hydt/391.html www.bjdzxz.com www.lfqcyl.com www.lfaosen.net www.lfadl.net