Abstract:
The invention relates to a method for leaching an ore containing copper and cobalt in a reactor, where the copper and cobalt minerals of the ore are mainly oxidic and partially sulphidic. The copper and cobalt of the ground ore are leached at ambient pressure by means of a solution containing sulphuric acid, the pH of which has been regulated to the region of 0.8 - 3. The temperature has been adjusted at the start or at some stage of leaching to be above 5O0C and a maximum of the boiling point of the solution in order to leach the oxidic and sulphidic part of the ore. Oxygen-containing gas may be used as an aid to leaching.
Abstract:
A simplified or truncated hydrometallurgical method for the removal of uranium, thorium, radium, lead, bismuth and polonium and/ or other radionuclides from a radioactive copper concentrate to produce an upgraded copper concentrate having lowered emission levels is described. The method involves subjecting the copper concentrate to an acidic leaching process (NONOX leach 120) using a copper sulfate and chloride salts containing lixiviant under lowered electrochemically conditions, to allow controlled removal of one or more of the radionuclides to produce the lowered emission level upgraded copper concentrate, and lower soluble copper losses in the discharge stream. The leaching process (120) is conducted to convert essentially all the copper in the lixiviant into the upgraded copper concentrate, and at elevated temperature and under pressure to suppress boiling in the leaching process.
Abstract:
The present invention relates to a process of gold and copper recovery from gold-containing copper ores obtained from mixed oxide-sulfide copper ore bodies by a series of flotation stages. More specifically, the present invention relates to a process of gold and copper recovery whereby gold-containing ores obtained from mixed oxide-sulfide copper ore bodies, and/or copper flotation by-products thereof, are subjected to at least one flotation step following a dewatering step. In particular, it recovers copper and gold from the oxidized zone of porphyry and other mixed ore deposits. Likewise, the present process allows recovery of copper and gold from the tailings and scavenger concentrates which, in conventional process are no longer viable for further treatment.
Abstract:
Embodiments of the present invention are directed to flotation of sulfidic materials following aerating by an oxidizing gas and contacting by a sulfoxy reagent.
Abstract:
A method for concentrating oxidized copper ore comprises preparation of the pulp, introduction of an ionized sulphide therein and flotation. Before flotation, the pulp and/or water solution of the ionized sulphide is subjected to electrolysis at a current density of 5-500 A/m . Use may be made of sulphides containing from 1 to 9 sulphur atoms. Such sulphides are introduced into the pulp having a temperature of 30-100 DEG C.
Abstract translation:浓缩氧化铜矿的方法包括制备纸浆,在其中引入电离硫化物和浮选。 在浮选前,电离硫化物的纸浆和/或水溶液以5-500A / m 2的电流密度进行电解。 可以使用含有1至9个硫原子的硫化物。 将这种硫化物引入温度为30-100℃的纸浆中
Abstract:
The present invention describes a process for removing uranium from a copper concentrate by magnetic separation (low and high field) aiming the reduction of the content of uranium in a copper concentrate to commercially acceptable levels.
Abstract:
Verfahren zur Gewinnung von Kupfer aus kupfer-und eisenhaltigen Erzen, Erzkonzentrate oder Mineralien mit folgenden Schritten: -Umwandlung der kupferhaltigen Erze, Erzkonzentrate oder Mineralien zu kupferhaltigen Sulfiden und Eisensulfiden durch Umsetzung mit Schwefel bei 300 bis 600°C für mindestens 5 min, -Mahlen des Umsetzungsproduktes -zumindest teilweises physikalisches Abtrennen der erhaltenen kupferhaltigen Sulfide von Eisensulfiden, -Behandlung der abgetrennten kupferhaltigen Sulfide durch pyrometallurgische oder hydrometallurgische Verfahren, um Kupfer zu erhalten.
Abstract:
The invention relates to a method for the extraction of metals from copper sulphide and/or copper iron sulphide ores with microbiological- and chemical-type leaching steps for dissolution of the metals, which comprises the following steps: 1) In a conversion step, prior to the leaching steps, the ores are converted to covellite, pyrites and admixed sulphides by the addition of sulphur, and 2) copper and other metals, noble metals and rare earths contained in the reaction product are extracted.