NOUFERROUS METALLURGICAL EQUIPMENT

The domestic iron ore grade is on the low side as a whole, and along with the mining depth dilution rate presents the upward trend, has increased the mineral processing cost obviously, has restricted the iron ore enterprise's sustainable development. Therefore, “More crushing, less grinding, can cast early cast” is still an important guiding principle for the design and transformation of beneficiation process in iron mines. At present, the crushing size of iron ore tends to be fine, (ultra) fine crushing has become the main crushing technology, the content of fine powder increases, the adhesion, inclusion and agglomeration between coarse ore and fine powder are easy to occur, the effect of conventional dry pre-selection equipment is not good. In order to solve the above problems, this paper introduces a kind of rotary magnetic field dry cleaning technology, which can realize high frequency magnetic flip by the fast asynchronous rotation of the cylinder and the magnetic system, and can effectively break up the agglomerate, and reduce the occurence of adhesion and inclusion, the test results show that it can improve the separation index remarkably, and has a broad application prospect in the pre-concentration section of iron ore (ultra-fine) crushing.