The kinetics of the catalytical oxidation acid leaching of arsenopyrite is studied in the HNO<sub>3</sub>-H<sub>2</sub>SO<sub>4</sub>-O<sub>2</sub> aqueous syst
A new method-dry High Gradient Magnetic Separation (HGMS)-to remove iron from ultrafine kaolin powder is described. A new kind of disperser, which breaks down the