A kind of method of green processing titanium tetrachloride dust collecting slag

Abstract

The invention belongs to the technical field of titanium tetrachloride production, and discloses an environment-friendly treatment method for titanium tetrachloride dust collecting slag. The method comprises the following steps that a, the titanium tetrachloride dust collecting slag is dissolved in a hydrochloric acid solution to obtain slurry; b, the slurry in step a is subjected to pressure filtration and separation to obtain filter residues and a filtrate; c, the filter residues obtained in step b are subjected to combined re-selection through a multi-stage shaking table and separated to obtain petroleum coke and titanium slag; d, the filtrate obtained in step b is filtered, concentrated and subjected to mist-spray calcination in a calcination furnace to obtain Fe2O3 powder and furnacegas containing HCl; e, the furnace gas in step d is dedusted by a cyclone dust collector, cooled to 100 DEG C or below and absorbed by water in an absorption tower to obtain a hydrochloric acid solution, and the hydrochloric acid solution is resued in step a; the Fe2O3 powder is packaged for sale. By means of the method, the titanium tetrachloride dust collecting slag is treated through the arrangement of the reasonable steps, effective components in the dust collecting slag can be fully recycled, and the environmental pollution caused by the chloride accumulation isavoided.

Description

technical field [0001] The invention belongs to the technical field of titanium tetrachloride production, and in particular relates to a method for green treatment of titanium tetrachloride to collect dust and slag. Background technique [0002] In the process of boiling chlorination to produce titanium tetrachloride, the solid components such as petroleum coke and titanium-rich materials (high titanium slag / rutile) are mainly added from the middle of the chlorination furnace, and the liquid chlorine is gasified and then fed from the bottom to form Fluidized bed, chlorination reaction occurs between materials to generate crude titanium tetrachloride gas. A part of petroleum coke and high-titanium slag / rutile with smaller particle size are discharged from the top of the chlorination furnace together with titanium tetrachloride gas, and enter the cyclone dust collector for gas-solid separation. TiO in high titanium slag / rutile 2 When it is chlorinated into titanium tetrachlo...

AI Technical Summary

Problems solved by technology

However, this kind of process is cumbersome, and the accumulation of solid waste will occupy a large amount of space, and the harmless treatment of resources has not been fully realized.