Abstract: A concentrator has an inclined hollow casing and a separating chamber communicating therewith having a pipe for supplying a material being handled, a pipe for discharging heavy fraction of the material being handled and a first pipe for supplying a separating fluid. A second pipe for supplying the separating fluid connects to the pipe for discharging heavy fraction.

Abstract: A gravity concentrator has a casing provided with at least one diaphragm connected to a drive for initiating pulsations in the casing which has pipes for supplying a material being treated and separating fluid and pipes for discharging heavy and light fractions of the material being treated.

Abstract: The invention relates to the protection of the environment.The invention may be most efficiently used for removing from aqueous media ions of heavy, non-ferrous and noble metals, organic substances, flotation reagents and petroleum products.The process comprises dissolving a metal anode in the presence of a non-soluble cathode and precipitating organic and inorganic impurities on the resultant compounds. The precipitation is conducted using a cathode made of a material having a potential which is higher than the potential of the anode, the electrodes being alternately brought in contact with the air oxygen and the liquor being treated.An apparatus for carrying out the process comprises a drum having openings for charging a metal scrap and the liquor being treated and for discharging the resultant precipitate. Wings are concentrically arranged on the inner surface of the drum. A perforated partition wall is provided adjacent to the outlet opening for preventing the loss of scrap from the drum.

Abstract: The invention relates to the protection of the environment.The invention may be most efficiently used for removing from aqueous media ions of heavy, non-ferrous and noble metals, organic substances, flotation reagents and petroleum products.The process comprises dissolving a metal anode in the presence of a non-soluble cathode and precipitating organic and inorganic impurities on the resultant compounds. The precipitation is conducted using a cathode made of a material having a potential which is higher than the potential of the anode, the electrodes being alternately brought in contact with the air oxygen and the liquor being treated.An apparatus for carrying out the process comprises a drum having openings for charging a metal scrap and the liquor being treated and for discharging the resultant precipitate. Wings are concentrically arranged on the inner surface of the drum. A perforated partition wall is provided adjacent to the outlet opening for preventing the loss of scrap from the drum.