METALLURGICAL PROCESS FOR TUNGSTEN MINERAL RAW MATERIAL WITH NO POLLUTANT DISCHARGE IN ENTIRE PROCESS

摘要

A metallurgical process for a tungsten mineral raw material (100), comprising: employing a weak base leaching agent conducive to forming a local process circulation, the leaching agent generating two or more gases in an evaporative crystallization process, each kind of gas being able to participate again in the synthesis of the leaching agent, and a crystallized separation scrubbing solution being similarly recycled as a leaching agent; and employing a transformation ingredient, the transformation ingredient having a chemical reaction with the tungsten mineral raw material (100) to enable tungsten element to be comprised in an intermediate easily dissolved by the leaching agent, and a leaching residue also comprising an ingredient element, such that at least a part of the leaching residue can be recycled as the ingredient. The process comprises a plurality of closed cycles, and produces no wastewater discharge in the entire process.