According to the feedback of manufacturers, the new orders of mainstream factories maintain stable prices, and the new volume of the market after the holiday is limited. On the demand side, the terminal basically has batch replenishment before the festival, and the purchase intention of new orders is low; On the supply side, mainstream manufacturers normally produce and deliver goods, and the actual output of the industry is stable. Most factories quote a new price of 17,000 yuan/ton or more market negotiation range reference 16000-17200 yuan/ton, plastics and papermaking related downstream feedback part of the tight model price is higher. Recent titanium dioxide raw material prices are strong, titanium dioxide price support is more stable, comprehensive market factors, the current titanium dioxide market to maintain a stable price.

The raw material used in this method is FeSO4. In order to maintain the Fe3 + concentration in the reaction medium in a specific range, reducing agent iron sheet is added in the reaction process. Iron yellow crystal seed was added and air was introduced to synthesize iron yellow under certain pH conditions. The method mainly includes two steps: (1) firstly, FeSO4 · 7H2O is used as raw material, NaOH or NH3 · H2O is used as precipitant or pH regulator, and air is used as oxidant to prepare crystal seed; (2) Iron yellow is produced by two-step oxidation with crystal seed, FeSO4, iron sheet and air.