Gradient control method of fused salt chlorination system temperature

Abstract

A gradient control method of fused salt chlorination system temperature adopts a fused salt chlorination temperature gradient control system. The fused salt chlorination temperature gradient control system comprises a fused salt chlorination furnace, a 1# dust collector, a 2# dust collector, a 1# titanium tetrachloride elution tower, a 1# titanium tetrachloride elution circulating tank, a returnedfused salt chlorination furnace slurry control valve, a returned 1# dust collector slurry control valve and a returned 2# dust collector slurry control valve; during the production process, a fused salt chlorination furnace outlet temperature of the fused salt chlorination temperature gradient control system is controlled at 450-650 DEG C; the temperature of the 1# dust collector outlet is 350-400 DEG C, and the temperature of the 2# dust collector outlet is 180-230 DEG C. The gradient control method has the advantages of being simple in technique and easy to operate; high-boiling-point chloride impurity in the gas generated through fused salt chlorination furnace can timely discharge out of the system, thereby preventing excessive deposition of impurity chloride.

Description

technical field [0001] The invention relates to a temperature gradient control method of a molten salt chlorination system. Background technique [0002] Large-scale molten salt chlorination production systems have been industrialized in China. In the production of molten salt chlorination, the molten salt chlorination furnace is its main reaction device. The function is that the high titanium slag is in the molten salt medium, and under the condition of the presence of the reducing agent (carbon), the chlorine gas converts the titanium in the high titanium slag. The oxides and other oxides are chlorinated into chlorides, and the main components of the furnace gas are TiCl 4 , AlCl 3 , FeCl 3 etc., and then remove most of the chloride impurities through the dust collection process, and then obtain the liquid titanium tetrachloride product through the washing process. When the production capacity of the molten salt chlorination furnace is increased to 130t / d-150t / d, durin...

AI Technical Summary

Problems solved by technology

If effective measures are not taken or the control effect is not good, the high-boiling point chloride impurities cannot be discharged from the system in time, and the impurity chlorides will deposit in the system. After reaching a certain level, the system pipeline will be blocked, causing the system pressure to be unstable or excessive. The deposited impurity chlorides will naturally fall off into the dust collection tank of the dust collector. When the volume of the fallen impurity chlorides is large, it is easy to cause the dust collection tank to fall off from the dust collector

In severe cases, the system needs to be shut down for cleaning, resulting in a decrease in titanium recovery rate, an increase in energy consumption, and an increase in cost

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