Copper-sulphur separation and ore dressing method for high-sulphur copper ores

Abstract

The invention discloses a copper-sulphur separation and ore dressing method for high-sulphur copper ores. The copper-sulphur separation and ore dressing method comprises the following steps: crushing, grinding and grading high-sulphur copper raw ores, feeding a grading overflow to a low-intensity magnetic separation operation, pre-selecting low-intensity magnetic concentrates, that is, pyrrhotites, and discharging low-intensity magnetic tailings; feeding the low-intensity magnetic tailings to a copper flotation operation, obtaining copper concentrates with a Cu grade of greater than 18% and a copper recovery rate of greater than 85%, and discharging copper flotation tailings, wherein during the copper flotation operation, lime is used as a pH regulator and a pyrite inhibitor, butyl xanthate is used as a collector, and No. 2 oil is used as a foamer; and feeding the copper flotation tailings to a flotation sulphur dressing operation to obtain sulphur concentrates, and throwing final tailings. The copper-sulphur separation and ore dressing method disclosed by the invention has the advantages of being stable in ore dressing indexes, low in medicament consumption, clean and environment-friendly, simple and convenient to operate, easy to operate and manage in the field, and the like; and the pyrrhotites are pre-selected through the low-intensity magnetic separation, the interference of the pyrrhotites on the copper flotation is eliminated, thus copper flotation indexes are greatly improved, the phenomena of high fluctuations of a copper concentrate grade and a copper recovery rate are avoided, and energy-saving and consumption-reducing effects are remarkable.

Description

technical field [0001] The invention belongs to the technical field of copper ore beneficiation, and specifically relates to a beneficiation method of high-sulfur copper ore. For pyrrhotite and pyrite, and for sulfur content greater than 10%, pyrrhotite and pyrite are symbiotic and It is especially suitable for copper and sulfur separation of pyrrhotite-based high-sulfur copper ore. Background technique [0002] Most of the copper minerals in the chalcopyrite-pyrhotrite type copper deposits are chalcopyrite, and there are also a small amount of bornite, copper blue and black copper ore and other minerals. Other metal minerals are mainly monoclinic pyrrhotite, followed by hexagonal pyrrhotite, pyrite and magnetite, and a small amount of siderite, limonite, rutile and trace sphalerite and galena ore and other minerals. Gangue minerals are mainly ferric garnet, followed by diopside and calcite, quartz, serpentine, muscovite, feldspar, anhydrite, biotite, talc, etc., and a sma...

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Problems solved by technology

[0004] In the actual production process of this process in the mine, because the raw ore contains a large amount of pyrrhotite, and pyrrhotite has the characteristics of "difficult to suppress" and "difficult to activate", that is, it is difficult to make it all float up through the action of an activator. It is also difficult to press all of them into the bottom of the tank through the action of inhibitors, so the existence of pyrrhotite often plays a negative role in the flotation process, deteriorating the selection index, making the flotation process complicated and the consumption of reagents large , the separation effect is not ideal, resulting in large fluctuations in copper concentrate grade (13-16%) and recovery (75-83%), which is difficult to control in production; and a large amount of inhibitors are added to suppress pyrite during copper selection, It will affect the magnetic tail flotation sulfur separation operation

Not only that, due to the large amount of reagents used, a large amount of flotation reagents contained in tailings and tailings water also have adverse effects on the environment

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