An energy-saving combined beneficiation process for high-oxidation, high-combined oxygen-sulfur mixed copper ore

Abstract

The invention provides an energy-saving combined ore dressing process for high-oxidation and high-bonding oxygen and sulfur mixed copper ore. The process comprises the steps of raw ore treatment, preparation of leaching solution, stirring and leaching, dynamic soaking selection, solid-liquid separation and washing and filtration of leached residue. The ore is crushed till the granularity is less than 10 millimeters, and the crushed ore with granularity of less than 3 millimeters is screened; sulfuric acid solution, the PH of which is less than 8, is used as the leaching solution; the raw ore is dynamically and continuously soaked for less than 24 hours, and the leachate is directly guided to an extraction process after PH value neutralization and micro pipe filtration; and the leached residue is separated by using a belt filter, and the filtered residue is treated in a flotation process to extract copper sulfide ore. According to the combined efficient washing and filtering process, dynamic soaking is adopted, the leachate is subjected to micro pipe filtration (the leachate with solid concentration of less than or equal to 3 percent in liquid can be filtered, and the solid content of the filtered liquid can be less than 50ppm), and the leached residue is separated by using the belt filter, so that the ore can meet the process requirement without fine crushing. By the process, the metal recovery rate of the high-bonding oxidized copper ore reaches over 80 percent, continuous production is realized, and energy consumption and production cost are comprehensively reduced.

Description

technical field [0001] The invention belongs to the technical field of beneficiation methods, and in particular relates to an energy-saving combined beneficiation process for high-oxidation and high-combination oxygen-sulfur mixed copper ore. Background technique [0002] Minerals are non-renewable resources. Over-exploitation leads to the gradual depletion of high-quality resources, making mining more and more difficult. Not only the grade of ore has declined, but the difficulty of beneficiation has also increased. In particular, copper sulfide ores with high oxidation, high bonding, and high calcium and magnesium are refractory mixed copper ores. The oxidation rate of this type of ore is higher than 40% (generally 40% to 50%), and the bonding rate is higher than 20% (generally 20% to 25%), its beneficiation technology is a worldwide technical problem. Flotation and wet leaching are the most commonly used mineral processing technologies. The flotation process can achieve ...

AI Technical Summary

Problems solved by technology

Flotation and wet leaching are the most commonly used mineral processing technologies. The flotation process can achieve a good recovery rate for sulfide ores with an oxidation rate lower than 30%, and generally can reach more than 80% of the economic and technical indicators of mineral processing. ; while the wet leaching process is mainly aimed at oxidized ores with an oxidation rate higher than 50%, and the leaching rate of oxidized ores can also reach more than 75%. Difficulties in the mineral processing industry

The existing technology is suitable for some, not only that, but the existing technology needs to crush the ore into fine powder (-200 mesh 85%) in order to increase the yield of metal copper, which greatly increases the production cost

Images