Method and system for recycling vanadium-containing mud generated in vanadium removal process of crude titanium tetrachloride

Abstract

The invention provides a method and a system for recycling vanadium-containing mud generated in a vanadium removal process of crude titanium tetrachloride. The vanadium-containing mud contains titanium tetrachloride liquid and VOCl2 solid. The method comprises the steps of adding the vanadium-containing mud into a molten salt furnace, evaporating, and collecting titanium tetrachloride in the vanadium-containing mud; introducing chlorine into the vanadium-containing mud to ensure that chlorine is reacted with VOCl2 in the vanadium-containing mud, and obtaining mixed gas containing VOCl3 gas and chlorine; condensing the mixed gas to obtain VOCl3 liquid and chlorine, wherein molten salt is filled in the molten salt furnace, and the temperature of the molten salt furnace is kept at 600-750 DEG C. The recycling system is used for implementing the method, and comprises the molten salt furnace, an air supply pipe, a TiCl4 gas collecting unit and a condenser. The recycling method and recycling system, provided by the invention, are used for realizing one-time recovery of valuable elements namely titanium and vanadium in the vanadium-containing mud, and are high in yield of vanadium and titanium, and high in purity of obtained products.

Description

technical field [0001] The invention relates to the technical field of metallurgy and environmental protection, more specifically, relates to a 4 A method for recovering valuable elements Ti and V from the vanadium-containing mud generated during the vanadium-removing refining process of aluminum powder. Background technique [0002] Titanium tetrachloride (TiCl 4 ) is an indispensable raw material for the production of sponge titanium and chloride titanium dioxide. Because there are many harmful impurities (such as vanadium) in the crude titanium tetrachloride produced by reduction smelting and chlorination of titanium-containing raw materials (for example, ilmenite), these impurities directly affect the quality of sponge titanium. Therefore, the crude titanium tetrachloride must be Titanium tetrachloride can only be used to produce sponge titanium and titanium dioxide after purification. Since the vanadium impurity in crude titanium tetrachloride is mainly composed of v...

AI Technical Summary

Problems solved by technology

Currently, for crude TiCl 4 The vanadium-containing mud produced during the vanadium-removing refining process of aluminum powder is mainly made of insoluble lime cake by adding lime and piled up in the slag yard. In this way, the refined vanadium-containing mud can not only recover the valuable element vanadium, but also takes up a lot of Land resources, resulting in environmental degradation, indirectly increased the production cost of sponge titanium

Images