A novel special magnetic separator was developed based on the special properties of precious metal-bearing alloy in high-grade nickel matte. The recovery of Au, Pt, and Pd was 77.79%, 84.79%, and 81.79% respectively at optimum operation conditions of magnetic separator feed of 2.5t/h, pulp density of 45%, and flush water of 1.5t/h, and the recovery significantly improved comparing with normal magnetic separator. Magnetic field simulation of the special magnetic separator indicates that magnetic intensity of 0.6 T can be generated on the surface of magnetic drum, which can strengthen the recovery of heavy alloy that contains precious metals. The alternate strong and weak magnetic field can also make magnetic particles rolling on the surface of drum, which will reduce the generation of magnetic agglomeration to a large extent and decrease the content of impurities in magnetic concentrate.

根据高档镍锍中含贵金属合金的特殊性能，研制了一种新型专用磁选机。磁选机进料2.5t/h、矿浆密度45%、冲洗水1.5t/h的最佳运行条件下，Au、Pt、Pd的回收率分别为77.79%、84.79%和81.79%。与普通磁选机相比，回收率显着提高。专用磁选机的磁场模拟表明，磁鼓表面可产生0.6T的磁场强度，可加强含贵金属的重金属的回收。强弱交替的磁场也能使磁粉在滚筒表面滚动，