Flotation separation method of high-sulfur and high-arsenic gold ore

Abstract

The invention discloses a flotation separation method of high-sulfur and high-arsenic gold ore, and belongs to the technical field of mineral processing. The flotation separation method comprises thesteps of (1) grinding raw ore to the preset fineness; (2) performing shaking table sorting treatment on ground products so as to recycle natural and native gold dissociated from the raw ore; and (3) merging shaking table tailings, then performing flotation operation, adding water glass and macromolecular agents containing -OH and -O- groups as a combined inhibitor, adding copper sulfate as an activating agent, fully mixing, then adding a collecting agent and a foaming agent, and performing flotation separation so as to obtain gold concentrates. According to the flotation separation method of the high-sulfur and high-arsenic gold ore, gold is recycled by adopting a reselection-flotation combined technological process, so that the recycling of gold is strengthened; the macromolecular agentscontaining the -OH and -O- groups are added, so that the inhibiting effects on chlorite, steatite and other laminar silicate mineral gangue minerals are enhanced, efficient separation of gold carryingminerals and gangue minerals is realized, and the grade of the gold concentrates is guaranteed. The process has the advantages of operation simplicity and high adaptability to ore and can satisfy the requirements of industrial production.

Description

technical field [0001] The invention belongs to the technical field of mineral processing and relates to a flotation separation method for high-sulfur and high-arsenic gold ore. Background technique [0002] The recycling of refractory gold ore resources has been paid more and more attention, among which, the separation of high-arsenic and high-sulfur gold ore has attracted the most attention. Gold in high-arsenic and high-sulfur gold deposits exists in different forms, some of which exist in the form of natural and primary gold, some exist in pyrite, some exist in arsenopyrite, and the rest exist in other sulfide ores or in oxidized ore. Since the gold in this kind of ore is generally finer in particle size, and flotation is the most conventional and effective beneficiation method, it is particularly important to crush and grind the ore before flotation. And this kind of gold mine is often accompanied by layered silicate minerals such as chlorite, talc, mica, kaolinite, e...

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Problems solved by technology

And this kind of gold mine is often accompanied by layered silicate minerals such as chlorite, talc, mica, kaolinite, etc., layered silicate minerals are fragile ores, and are easily produced during the grinding process. A large amount of ore slime deteriorates the pulp flotation environment. Because of the strong surface energy of the extremely fine layered silicate mineral particles, it is easy to form a cover on the surface of the target mineral, making it difficult to separate useful minerals, resulting in flotation. At the same time, it will consume a large amount of flotation reagents and increase the production cost of mineral processing enterprises

At present, water glass is the main inhibitor used to inhibit silicate minerals in high-sulfur and high-arsenic flotation, but water glass has the following problems: the dosage of medicament is large, the inhibition effect is poor, and the concentrate is difficult to settle and filter, which leads to the loss of gold. low recovery rate

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