钛铁矿提取TiO<sub>2</sub>及制备钛白粉研究进展

doi:10.11896/cldb.24010240

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Abstract Titanium resources in China account for about one-third of the global titanium resources reserves, but they exist mainly in the form of primary titanium (magnetic) iron ore where titanium and iron are symbiosed, and it is complicated and difficult to efficiently utilize this kind of resources. The technological status of TiO₂ extraction from ilmenite and production of titanium dioxide is reviewed in the summary. The characteristics, advantages and disadvantages of various methods are analyzed. The analysis shows that the main preparation methods are sulfuric acid method, hydrochloric acid method, fluorination method, molten salt method and alkaline roasting method. Sulfuric acid method, the main stream process for the production of titanium dioxide in China, has low requirements on raw materials, but there are several problems such as long production process, low product quality, difficult treatment of by-products and “three wastes” discharge. Hydrochloric acid method, using extraction process to separate iron, has some problems such as co-extraction of ferrotitanium and equipment corrosion caused by volatile hydrochloric acid, and some defects such as high price of extractant and difficult recycling. The fluorination method, using NH₄F or NH₄HF₂ as the leaching agent, has the advantages of mild reaction conditions, but has the problem of equipment corrosion. The submolten salt process, using a high concentration of KOH liquid phase medium to decompose ilmenite, has advantages of mild reaction conditions and low “three wastes” discharge, but has the defects of large consumption of submolten salt and difficult recycling of lye. Alkaline roasting method, using weak acid to decompose ilmenite after roasting, is superior in technology, but has problems of large consumption of alkaline substances and high cost. It is still in the research stage. To prepare titanium dioxide with ilmenite as raw materials, it is still necessary to optimize and improve the traditional process, and increase the investment in research and development of new processes, in order to eliminate the shortcomings of the existing preparation scheme and promote the healthy development of the titanium dioxide industry.

Key words： ilmenite titanium dioxide sulfuric acid process hydrochloric acid process

Published: 10 April 2025 Online: 2025-04-10

CLC number:

TQ624

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	Articles by authors
	YANG Shuangyu
	LIAO Yalong
	JIA Xiaobao
	WU Min

Cite this article:

YANG Shuangyu,LIAO Yalong,JIA Xiaobao, et al. Research Progress on TiO₂ Extraction and Preparation of Titanium Dioxide from Ilmenite[J]. Materials Reports, 2025, 39(7): 24010240-10.

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https://www.mater-rep.com/EN/10.11896/cldb.24010240 OR https://www.mater-rep.com/EN/Y2025/V39/I7/24010240

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