A method for hydrometallurgical processing of friable concentration products containing precious nonferrous and ferrous metals comprising preliminary magnetic separation of friable products to pass ferrous metals into the magnetic product and to produce a nonmagnetic fraction containing nonferrous and precious metals. The nonmagnetic fraction is treated with an alkali solution in the autoclave at 80.degree.-190.degree. C. and an oxygen pressure of 0.1-0.8 MPa, passing aluminium into the solution and obtaining a solid sediment. The sediment is treated with a sulfuric acid solution in the autoclave under a surplus oxygen pressure, passing nonferrous metals into the solution and producing enriched concentrate of precious metals in the solid sediment.