The process is acid adding pre-leaching at normal pressure, pressurized oxygen leaching to leach out base metals and filtering separation to obtain solid noble metal concentrate.

After turning vane rotary flow off the air after oil, continue to up after packing, will the air filter layer of oil and other impurities again for the separation and filtering.

Beside filtering interference signals and extract effective signals, it is a difficult problem to study the separation of multi-signal of sound wave and vibration.