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METHOD FOR SEPARATING VANADIUM AND CHROMIUM FROM VANADIUM-CHROMIUM SLAGS
METHOD FOR SEPARATING VANADIUM AND CHROMIUM FROM VANADIUM-CHROMIUM SLAGS
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机译：从钒铬渣中分离钒和铬的方法
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摘要
The invention relates to the metallurgy field of vanadium and chromium, in particular to a method for separating the vanadium and the chromium from vanadium-chromium slags. The method is beneficial for effectively realizing cleanly and efficiently recycle of vanadium and chromium resources in the vanadium-chromium slags, and comprises the following steps of a, mixing vanadium-chromium slag powder,sodium carbonate and aluminum salt, and preparing into a vanadium-chromium slag pellet; b, roasting the vanadium-chromium slag pellet to obtain a clinker pellet; c, carrying out water leaching on theclinker pellet, carrying out solid-liquid separation on a leached slurry, and obtaining a vanadium-chromium solution and residues; d, adding calcium oxide for carrying out molybdenum precipitation for 50 to 120min, and obtaining crude calcium vanadate and a chromium solution; e, obtaining refined calcium vanadate and washing water containing vanadium and chromium, wherein the washing water containing the vanadium and the chromium is used for leaching the roasted clinker; and f, adopting a carbonization method on the chromium solution so as to prepare sodium dichromate, wherein a byproduct sodium bicarbonate is used as a sodium additive for roasting the vanadium-chromium slags. The method provided by the invention is particularly suitable for processes for separating the vanadium and the chromium from the vanadium-chromium slags.
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