Beneficiation method for molybdenum-containing high-zinc complex magnesium silicate altered skarn type copper ore

Abstract

The invention discloses a beneficiation method for molybdenum-containing high-zinc complex magnesium silicate altered skarn type copper ore. The beneficiation method comprises the steps of first-stage ore grinding, copper-molybdenum-zinc-talc mixed roughing, second-stage ore grinding, copper-molybdenum-zinc-talc mixed concentration, copper-molybdenum-zinc-talc flotation separation, molybdenum-zinc-talc reselection separation and molybdenum-zinc column type separation. According to the method, in the full flotation process, talc and other easily-floating magnesium silicate minerals are not inhibited, but are removed through centrifugal reselection, the problems of target sulfide metal mineral inhibition, tailing filtration and the like caused when easily-floating gangue is inhibited by a macromolecular inhibitor in traditional mineral separation are solved, and the recovery rate of target sulfide multi-metal minerals is increased to the maximum extent.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a beneficiation method for altering skarn-type copper ore with complex magnesium silicate containing molybdenum and high zinc. Background technique [0002] Copper is widely used in electric power, electronics industry, construction transportation, aerospace military industry, light industry and daily necessities, and has an important strategic position; easy-to-select porphyry copper contributes more than 70% of the world's copper, and there are many previous studies. However, the easy-to-select copper resources are facing depletion with continuous development, and the skarn-type complex copper resources are more and more valued by mineral processing workers. [0003] Copper minerals in complex magnesium silicate altered skarn-type copper ores containing molybdenum and high zinc are mainly chalcopyrite, part of chalcocite and copper blue, zinc minerals are...

AI Technical Summary

Problems solved by technology

This type of complex magnesium silicate altered polymetallic ore often has the following difficulties: First, layered magnesium silicate minerals such as talc have the same natural surface hydrophobicity as molybdenite, and have good buoyancy, which is difficult to achieve by conventional talc inhibition. Effective separation; secondly, there are often a large number of unavoidable ions in the slurry of complex altered ores, such as Cu produced during the formation of secondary copper 2+ It will have a strong activation effect on sphalerite, so that sphalerite has excellent buoyancy. If the impact of unavoidable ions cannot be effectively eliminated and the surface pretreatment of sphalerite cannot be effectively eliminated, sphalerite is bound to be difficult to suppress; moreover, for The realization of mineral dissociation and surface pretreatment will inevitably reduce the size of mineral particles, and some minerals will inevitably face the problem of fine particle flotation separation; in summary, due to the particularity of ore properties, copper molybdenum zinc minerals and some magnesium silicate Salt minerals have "indifferent" buoyancy, posing a great challenge to the separation and recovery of polymetallic minerals

At present, mines mainly use partial priority flotation and mixed flotation to deal with this kind of ore. When partial priority flotation process suppresses sphalerite at the front end of the process, it depends on the buoyability of sphalerite and the inevitable ionic strength of the pulp. , when there are many unavoidable ions and the sphalerite has good floatability, the sphalerite inhibition effect is not ideal, and the copper minerals are inhibited; although the mixed flotation avoids the copper ore caused by the suppression of sphalerite at the front end of the process However, it is difficult to solve the "no difference" buoyancy problem of copper, molybdenum and zinc minerals during the separation of multiple metals. Forcibly inhibiting the separation will cause greater damage to other purpose metals, and the product quality is poor; Salts are usually pre-removed by flotation or inhibited by polymer inhibitors, and the difference in buoyancy of gangueite will cause the loss of target minerals to varying degrees.

The existing process is not suitable for the sorting of complex magnesium silicate altered polymetallic ores

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