Method of separating vanadium and titanium efficiently from vanadium slag mixed material

Abstract

The invention provides a method of separating vanadium and titanium efficiently from a vanadium slag mixed material. The method is characterized by comprising the following steps: (1) crushing and screening; (2) water quenching vanadium slag; (3) crushing and screening; (4) mixing; (5) tabletting; (6) roasting and activating; (7) roasting selectively; (8) cooling and uniformly mixing; (9) leaching; and (10) preparing vanadium pentoxide. Raw materials in the roasting process are prevented from being fused and decomposed by adding a silicon dioxide mixed material to tablet. Vanadium and titaniumare sulfated by ammonium sulfate roasting, and sulfate of titanium is decomposed by means of selective roasting, so that vanadium and titanium in the vanadium slag are separated. The method reduces the energy consumption needed by a conventional vanadium slag roasting and vanadium extracting process, and a tablet is roasted invariable in shape in the reaction process, and the condition that the service life is affected as the tablet is adhered to a reactor is avoided. The method is a typical low-carbon, green and environment-friendly vanadium slag utilization technique.

Description

technical field [0001] The invention relates to a method for efficiently separating vanadium and titanium from mixed vanadium slag, belonging to the technical field of metallurgy. Background technique [0002] Vanadium slag and stone coal are two typical raw materials for the preparation of vanadium pentoxide in my country, but the geological and mineralization factors, resource distribution and mineral phase composition of the two are very different. Vanadium slag is the slag produced by vanadium-titanium magnetite through blast furnace ironmaking and converter steelmaking, which contains a large amount of vanadium-iron spinel phase, ilmenite phase, olivine phase, free quartz and metallic iron. The main sources of resource distribution and production and processing of vanadium-titanium magnetite are the Panzhihua area of ​​Sichuan Province and the Chengde area of ​​Hebei Province. Stone coal is a typical vanadium-bearing shale. The main phases are quartz, muscovite, calcit...

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: The present invention provides a method for efficiently separating vanadium and titanium from vanadium slag mixture, the purpose of which is to solve the problems of high pollution, high energy consumption and low efficiency in the traditional method of vanadium extraction from vanadium slag, and effectively recover titanium resources in vanadium slag , to solve the problem of raw material sintering in the roasting process