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5642863 Method of extracting metals from ore material
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PatentsALERT
5641452 DEVICE FOR RECOVERING SILVER F R O M FLUIDS AND P R O C E S S USING SAME Azzara Jerome A Spartanburg, SC, UNITED STATES assigned to United Resource Recovery Corporation A silver recovery device for recovering silver from silver containing fluids is provided. The silver recovery device includes an outside container having a fluid inlet and a fluid outlet. A silver recovery cartridge, positioned within the outside container, includes a silver recovery element surrounded by a liner. In one embodiment, the liner can include a sealed top for allowing the cartridge to be pressurized with fluid. Also, the silver recovery device can include a filter element for filtering the fluids prior to exiting the device.
5642863 M E T H O D OF E X T R A C T I N G METALS FROM ORE MATERIAL Patzelt Norbert; Knecht Johann Beckum, GERMANY assigned to Krupp Polysius AG In this method according to the invention for extracting metals, starting ore material is subjected to material bed comminution and then leached by the addition of leaching fluid. In order to be able to ensure an optimal yield of metals even in the case of greatly differing particles sizes of the comminuted ore material, the comminuted ore material is divided into oversize material and fine material, whereupon oversize material is delivered to a heap
leaching and fine material to a tank leaching.
5649894 COMPOSITIONS AND M E T H O D S FOR WASTE T R E A T M E N T White Timothy John; Kyle James Hamilton; Eaton Gregory Francis West Lakes Shore, South Australia, AUSTRALIA assigned to Kyle James Hamilton; White Timothy John PCT No. PCT/AU93/00489 Sec. 37 l Date May 1, 1995 Sec. 102(e) Date May 1, 1995 PCT Filed Sep. 21, 1993 PCT Pub. No. WO94/06575 PCT Pub. Date Mar. 31, 1995. Methods for waste treatment and compositions of stabilized waste elements are provided, typically for the disposal of arsenical wastes. Arsenic trioxide waste produced as a by-product of metal extraction is slurried in water for from 6 to 24 hours with finely divided quicklime to produce nonvolatile calcium arsenate (III). An excess of CaO stoichiometry with As is used to consume secondary waste species such as sulphate, silicate and iron oxides. The precipitated arsenate is oven dried at 120°C and then calcined in air between 15 minutes to several hours at 1000°C to 500°C respectively to oxidize arsenate (III) to arsenate (V) as Ca5(AsO4)3(OH) (an apatite) as the major arsenic immobilization phase, with minor arsenic incorporated in Ca3(AsO4)2. Calcium sulphate anhydrate (sulphate immobilization) and calcium iron oxide (iron immobilization) are also produced. Tertiary immobilization is achieved milling or fracturing and incorporating the apatite an encapsulant consisting of ordinary portland cement and flyash. After curing for one month in steel drums in a water
PatentsALERT
5641452 DEVICE FOR RECOVERING SILVER F R O M FLUIDS AND P R O C E S S USING SAME Azzara Jerome A Spartanburg, SC, UNITED STATES assigned to United Resource Recovery Corporation A silver recovery device for recovering silver from silver containing fluids is provided. The silver recovery device includes an outside container having a fluid inlet and a fluid outlet. A silver recovery cartridge, positioned within the outside container, includes a silver recovery element surrounded by a liner. In one embodiment, the liner can include a sealed top for allowing the cartridge to be pressurized with fluid. Also, the silver recovery device can include a filter element for filtering the fluids prior to exiting the device.
5642863 M E T H O D OF E X T R A C T I N G METALS FROM ORE MATERIAL Patzelt Norbert; Knecht Johann Beckum, GERMANY assigned to Krupp Polysius AG In this method according to the invention for extracting metals, starting ore material is subjected to material bed comminution and then leached by the addition of leaching fluid. In order to be able to ensure an optimal yield of metals even in the case of greatly differing particles sizes of the comminuted ore material, the comminuted ore material is divided into oversize material and fine material, whereupon oversize material is delivered to a heap
leaching and fine material to a tank leaching.
5649894 COMPOSITIONS AND M E T H O D S FOR WASTE T R E A T M E N T White Timothy John; Kyle James Hamilton; Eaton Gregory Francis West Lakes Shore, South Australia, AUSTRALIA assigned to Kyle James Hamilton; White Timothy John PCT No. PCT/AU93/00489 Sec. 37 l Date May 1, 1995 Sec. 102(e) Date May 1, 1995 PCT Filed Sep. 21, 1993 PCT Pub. No. WO94/06575 PCT Pub. Date Mar. 31, 1995. Methods for waste treatment and compositions of stabilized waste elements are provided, typically for the disposal of arsenical wastes. Arsenic trioxide waste produced as a by-product of metal extraction is slurried in water for from 6 to 24 hours with finely divided quicklime to produce nonvolatile calcium arsenate (III). An excess of CaO stoichiometry with As is used to consume secondary waste species such as sulphate, silicate and iron oxides. The precipitated arsenate is oven dried at 120°C and then calcined in air between 15 minutes to several hours at 1000°C to 500°C respectively to oxidize arsenate (III) to arsenate (V) as Ca5(AsO4)3(OH) (an apatite) as the major arsenic immobilization phase, with minor arsenic incorporated in Ca3(AsO4)2. Calcium sulphate anhydrate (sulphate immobilization) and calcium iron oxide (iron immobilization) are also produced. Tertiary immobilization is achieved milling or fracturing and incorporating the apatite an encapsulant consisting of ordinary portland cement and flyash. After curing for one month in steel drums in a water