Figure 1 Process flow chart of Raul process titanium sponge production
Brief description of process flow:
Electric furnace smelting: the production of high-titanium slag. The process flow is shown in Figure 2 for the production flow chart of titanium slag.
Figure 2 Flow chart of titanium slag production
The electric furnace smelting method produces high-titanium slag by mixing ilmenite and solid reducing agent anthracite or petroleum coke into the electric furnace for reduction smelting. The oxides in the ore are selectively reduced to metallic iron, while the titanium oxides are enriched. In the slag, high-titanium slag and by-products are obtained through slag-iron separation
After cooling, crushing, magnetic separation, and grinding, metal iron, and high-titanium slag are sent to the chlorination workshop.
In the titanium slag production process, electricity is mainly used. The main energy-consuming equipment is a self-made 6300kV"A low-fume hood electric arc furnace.
Chlorination: the production of crude titanium tetrachloride. The main flow chart is shown in Figure 3.
Figure 3 Production flow chart of titanium chloride
The crushed high-titanium slag and petroleum coke are weighed and mixed in a certain proportion, mixed and dried, and fed into the chlorination furnace from the boiling section from the mixing hopper with a feeder. Chlorine enters the furnace from the bottom of the chlorination furnace, and the added mixture reacts with the chlorine to generate titanium tetrachloride and other impurities.
Chlorides and gases such as carbon monoxide and carbon dioxide. Chlorides with a boiling point lower than the chlorination temperature, such as FeCl3, AICI3 (sublimation gas) and other gases will volatilize out of the chlorination furnace with TICI4-, while chlorides with a boiling point higher than the chlorination temperature such as CaCl2, MgC12, etc., and Unreacted TiO2, C powder, etc. remain in the furnace together to become slag.
The mixed gas that escapes from the top of the chlorination furnace is mainly composed of TiCI4, AICI3, FeCI3, etc., as well as solid particles entrained by the airflow, and enter the dust collector. Due to the effect of deceleration and cooling, AICI3, FeCI3, etc. Most of the high-boiling chlorides and solid particles carried out by the gas are deposited by condensation. The mixed gas from the precipitator enters the leaching tower, and the liquid of TiCI4, after being cooled by the chilled saltwater contacts, so that TiCI4, other gases, and high-boiling impurities are leached, and the leached TiCI4 liquid still contains more After sedimentation and filtration, the crude titanium tetrachloride liquid with light yellow or reddish-brown is obtained. The non-condensable gas is exhausted through the chimney after the exhaust gas purification treatment reaches the standard.
In the production process of crude titanium tetrachloride, the main energy used is petroleum coke, compressed air, electricity, circulating water, and low-temperature brine. The main equipment includes Φ1200 chlorination furnace, Φ2400 chlorination furnace, and auxiliary pump equipment.
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