Method for extracting vanadium from high calcium vanadium slag environmentally

The invention relates to a method for extracting vanadium from high calcium vanadium slag environmentally, and belongs to the technical field of vanadium extraction chemical industry. The technical problem solved by the invention is that the recovery rate of vanadium extracted from high calcium vanadium slag in a manner of sodium salt roasting is not high. The invention discloses a method for extracting vanadium from high calcium vanadium slag environmentally; a certain inorganic sodiumating agent is adopted; and the vanadium in the high calcium vanadium slag can be effectively extracted by the steps of activation pretreatment of raw materials, granulating, leaching and hydrolyzing vanadium precipitation. The method provided by the invention can evaporate and crystallize waste water; and then sulfuric acid is added to obtain sodium hydrogen sulfate for recycling; the method has no waste water discharge, is green and environment-friendly; the process is simple and easy, the applicationscope is wide, the cost i