The invention relates to a method for reclaiming valuable elements through gradient chlorination of
vanadium slag, which belongs to the technical field of
chemical industry and is used for solving the problem of efficiently reclaiming multiple
metal elements in the
vanadium slag. The method is characterized by comprising the steps of proportioning raw materials, fractionating
vanadium tetrachloride and
vanadium oxytrichloride, fractionating
ferric trichloride, fractionating
titanium tetrachloride,
chromium trichloride and
silicon tetrachloride, collecting
fractionation products,
processing chlorination
tailings and the like. By directly adopting the vanadium
slag as the
raw material in the method of the invention, the highly efficient and comprehensive utilization of vanadium-
titanium magnetite resources is realized in one process; the valuable elements such as iron, vanadium,
chromium,
silicon,
titanium and the like are enriched through gradient chlorination and selective separation, and the purifying process is relatively simple; closed circulation can be realized by using
chlorine in the process and has no environmental
pollution; and the whole flow is disengaged from an aqueous
system, thereby
water resources are saved, and meanwhile, the
pollution of the traditional flow to the environment is avoided. The method of the invention has the advantages of short flow, high element yield, no
pollution, high benefit and the like.