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Flotation method for improving beneficiation index of gold-bearing copper sulfide ore

A copper sulfide and ore technology, applied in flotation, process efficiency improvement, recycling technology and other directions, can solve the problems of corrosion equipment, poor floatability, poor quality of copper concentrate, etc., to improve quality and recovery rate , the effect of improving gold recovery rate and copper recovery rate

Active Publication Date: 2022-02-08
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

But this process method has the following problems: (1) copper and gold minerals will be inhibited to a certain extent under high alkali (pH>11) conditions, resulting in low recovery rates of copper and gold
The reason is that under high alkaline (pH>11) conditions, a large amount of OH - It will promote the formation of a hydrophilic iron hydroxide film on the surface of the chalcopyrite, and the floatability of the chalcopyrite will be deteriorated, resulting in a low recovery rate of copper and gold
At the same time, the gold-containing carrier mineral pyrite will be severely inhibited under high alkali conditions, and the surface of the gold monomer mineral will be polluted, resulting in poor floatability
This is the root cause of the low recovery rate of copper and gold in the lime high alkali flotation process; (2) the use of a large amount of lime can easily cause serious slime entrainment and affect the concentrate quality; (3) there is a large amount of lime, Difficult to control, easy scaling and clogging of pipelines, corrosion of equipment, serious mine wastewater pollution and other problems; (4) When xanthate and black medicine are used as collectors for gold-containing copper-sulfur ores, there is a problem of poor selectivity, which in turn causes inhibition Increased consumption of doses
It can be seen that the recovery rate of copper and gold in the lime high alkali flotation process is low, the quality of copper concentrate is poor, the waste of resources is serious, and it is difficult to realize the economical, efficient and clean development and utilization of gold-containing copper-sulfur ore resources

Method used

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  • Flotation method for improving beneficiation index of gold-bearing copper sulfide ore

Examples

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Effect test

Embodiment 1

[0038] The raw ore grades selected in this embodiment are copper 0.75%, sulfur 24.50%, iron 25.32%, and gold 0.28g / t. Its material composition is as follows: the main metal minerals in the ore are mainly pyrite and chalcopyrite, and the small and trace minerals are marcasite, bornite, chalcocite and blue chalcocite; the gangue minerals are pyroxene, Dolomite, quartz, calcite, feldspar, chlorite, epidote, etc. The phase analysis results of raw ore copper show that the copper minerals are mainly primary copper minerals (accounting for 92%), and chalcopyrite accounts for 95% of the primary copper minerals.

[0039] The combined inhibitor used in this example is obtained by mixing 45 parts of hydrogen peroxide and 65 parts of starch.

[0040] The combination collector used in this example is obtained by mixing 60 parts of collector Z-20000 and 40 parts of collector BK91640.

[0041] The specific beneficiation steps are as follows:

[0042] (1) Sodium carbonate is added to the r...

Embodiment 2

[0048] The raw ore grades selected in this embodiment are copper 0.58%, sulfur 22.50%, iron 23.32%, and gold 0.21g / t. Its material composition is as follows: the main metal minerals in the ore are pyrite and chalcopyrite, and the small and trace minerals are bornite, chalcocite and blue chalcocite; the gangue minerals are dolomite, quartz and calcite. The results of phase analysis of raw ore copper show that copper minerals include primary copper minerals and secondary copper minerals, with primary copper minerals as the main (accounting for 92%), chalcopyrite accounting for 95% of primary copper minerals, and copper oxide 2%.

[0049] The combined inhibitor used in this example is obtained by mixing 50 parts of hydrogen peroxide and 50 parts of starch.

[0050] The combined collector used in this example is obtained by mixing 50 parts of collector Z-20000 and collector BK91650 parts.

[0051] The specific beneficiation steps are as follows:

[0052] (1) Sodium carbonate is...

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Abstract

The invention discloses a flotation method for improving the beneficiation index of gold-bearing copper sulfide ore, and belongs to the technical field of metallurgical beneficiation. Based on the technical route of thiosulfate corrosion, sulfuration precipitation, hydrogen peroxide and starch coupled inhibition and copper and sulfur selective flotation separation, separation of the gold-containing copper sulfide ore is carried out. The flotation method comprises the following steps: (1) roughing; (2) scavenging I; (3) concentration I; (4) scavenging II; (5) concentration II; and (6) concentration III. By means of the flotation method, gold in carrier minerals can be converted into independent gold sulfide minerals, the situation that gold in pyrite is lost into tailings is avoided, the synergistic benefit of the combined inhibitor is fully exerted, the quality and the recovery rate of gold and copper concentrates are improved, and economical, efficient and clean development and utilization of the gold-containing copper-sulfur ore are achieved under the low alkalinity condition.

Description

technical field [0001] The invention relates to the technical field of metallurgical beneficiation, in particular to a flotation method for improving the beneficiation index of gold-containing copper sulfide ore. Background technique [0002] Copper is widely used in military industry, electric power, communication, transportation, light industry, construction, machinery and other industries. The latest statistical data show that: my country already has 95.538 million tons of proven copper reserves, of which copper reserves with a copper grade lower than 0.7% account for about 56%, and the average grade of porphyry copper deposits is about 0.5% . The industrial types of copper ore deposits in my country are relatively complete, and 80% of the copper minerals with industrial value belong to sulfides. With the deepening of mining and the reduction of easy-to-select ores, the characteristics of copper sulfide ore resources, such as poverty, fineness, and miscellaneous, have be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/018B03D101/06B03D101/02B03D101/04B03D103/02
CPCB03D1/018B03D2201/06B03D2201/02B03D2201/04B03D2203/025Y02W30/52
Inventor 丁湛柏少军毕云霄李颉袁加巧文书明
Owner KUNMING UNIV OF SCI & TECH
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