Method for recovering valuable metal elements in converter vanadium slag

The invention discloses a method for recovering valuable metal elements in converter vanadium slag and belongs to the field of comprehensive resource utilization. According to the method, valuable metal elements in the converter vanadium slag are extracted by adopting a two-section leaching mode. The method comprises the following steps: crushing the converter vanadium slag, mixing the converter vanadium slag with a raw material of which the main component is sulfuric acid, stirring, leaching and thus obtaining leaching solution; mixing the converter vanadium slag with the leaching solution, leaching to obtain primary leaching ore pulp, separating to obtain primary leaching slag and primary leaching solution, performing extraction and reextraction on the primary leaching solution to separate the valuable metals such as vanadium and iron, and mixing the primary leaching slag and the raw material of which the main component is sulfuric acid so as to enter the secondary leaching process; allowing the obtained secondary leaching solution to enter the primary leaching process, wherein the secondary leaching slag refers to tailings, the main component of the slag is silica, and the slag can be used for cement and other industrial raw materials or can be used for preparing silicon carbide and other materials. By adopting the method, the valuable metal elements in the converter vanadium slag are extracted, and the slag-free production process is realized, so that the method is a green and environment-friendly vanadium extraction process.