titanium dioxide used in concrete

...

In recent years, China's production of talc and titanium dioxide has increased significantly, making it one of the world's largest producers of these minerals. According to the US Geological Survey, China produced approximately 2.5 million metric tons of talc and 2.4 million metric tons of titanium dioxide in 2019 alone. This growth can be attributed to the country's vast reserves of these minerals, as well as government initiatives aimed at boosting domestic production and reducing reliance on imports.

...

Titanium Dioxide is largely produced by the reduction of titanium tetrachloride, obtained in turn from chlorination of natural rutile, synthetic rutile derived from ilmenite or even slags rich in TiO2 produced by metallurgical treatment of ilmenite. TiO2 is also manufactured by treatment of ilmenite with sulfuric acid. Raw materials and the respective production processes employed in the manufacturing of Titanium Dioxide are listed below.

...