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Inhibitor and ore dressing method of high-sulfur refractory copper and sulfur ore

A beneficiation method and technology for sulfur ore, applied in flotation, solid separation and other directions, can solve the problems of large consumption, adverse effects of copper recovery, difficult to suppress, etc., to reduce high alkalinity pressure, improve comprehensive utilization rate, and suppress effect. obvious effect

Inactive Publication Date: 2019-05-03
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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Problems solved by technology

[0002] Copper sulfide minerals have a close symbiotic relationship with iron sulfide minerals (marcasite, pyrite, pyrrhotite, arsenopyrite, etc.), among which high-sulfur copper ores have a high content of iron sulfide minerals, especially some Iron sulfide minerals are "difficult to suppress" and "difficult to activate", which makes the flotation process complicated
[0003] In addition, lime, as a copper-sulfur separation inhibitor, consumes a lot in the process of copper-sulfur separation flotation, and there are many disadvantages in the large-scale use of lime: ①In industrial production, it is used in a large amount, and it is prone to pipe plugging and scaling; ②The mineral processing wastewater is alkaline High concentration and high cost of wastewater treatment; ③ It has an inhibitory effect on some copper sulfide minerals, which has an adverse effect on the recovery of copper; ④ It has an adverse effect on the comprehensive recovery of associated valuable metals such as gold and silver.
[0004] At present, some auxiliary inhibitors are usually added to reduce the amount of lime during copper-sulfur separation flotation. Commonly used auxiliary inhibitors include sodium humate, calcium hypochlorite, sodium sulfide, sulfite, etc., but many auxiliary inhibitors are either strong or Weak average will have a certain inhibitory effect on the copper minerals in the ore, which is not conducive to the improvement of copper indicators

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  • Inhibitor and ore dressing method of high-sulfur refractory copper and sulfur ore

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specific Embodiment approach

[0019] Inhibitor and mineral processing method of high-sulfur refractory copper-sulfur ore of the present invention, its preferred embodiment is:

[0020] The inhibitor of high-sulfur refractory copper-sulfur ore is mixed with lime and sodium hexametaphosphate, and its mass ratio is: lime: sodium hexametaphosphate = 2.0-4.0:0.2-0.6.

[0021] The beneficiation method of high-sulfur refractory copper-sulfur ore comprises the following steps:

[0022] A. The steps of mixing and floating gangue after mixing coarse concentrate and regrinding:

[0023] Concentrate and dehydrate the copper-sulfur mixed coarse concentrate, then regrind through a wet ball mill, add butyl xanthate to the regrind mixed coarse concentrate slurry, select to obtain copper-sulfur mixed concentrate, and fine sweep to obtain the following Gangue mineral-based tailings II;

[0024] B. Steps for separation of mixed concentrate copper and sulfur:

[0025] Add the above-mentioned inhibitor and BK404 to the copp...

Embodiment 1

[0035] The raw ore of a copper-sulfur ore dressing plant in Anhui contains 0.85% Cu and 15.23% S. Copper minerals mainly exist in the form of chalcopyrite, with trace amounts of bornite, copper blue, tetrahedrite and chalcocite; most of the sulfur minerals are marcasite, pyrite and pyrrhotite; Iron minerals are mainly siderite, followed by magnetite, hematite and trace limonite. The gangue minerals are mainly quartz, followed by chlorite, plagioclase and kaolinite, and a small amount of calcite, orthoclase, dolomite, muscovite, biotite, apatite and trace amounts of talc.

[0036] Adopt the present invention to carry out ore dressing to this raw ore, its concrete steps are as follows:

[0037] (1) Raw ore grinding: Grinding the raw ore through a wet ball mill until the ore with a particle size of no more than 0.074mm accounts for 78% of the total ore weight, stop the grinding, and make a raw ore pulp with a mass concentration of 33%;

[0038] (2) Copper-sulfur mixed flotation...

Embodiment 2

[0047] A copper-sulfur polymetallic mine in Fujian contains 0.87% Cu and 12.09% S. The useful minerals are mainly chalcopyrite, pyrite and molybdenite, and a small amount of other metal minerals, such as chalcopyrite, galena, magnetite ore, hematite, limonite, siderite and pyrrhotite, etc.; there are many kinds of gangue minerals, mainly garnet, quartz and calcite, followed by pyroxene and chlorite, and a small amount of actinolite , hornblende, dolomite, feldspar and mica, etc.

[0048] The ore is beneficiated by the present invention, and the beneficiation results are as follows: by weight percentage, the finally obtained copper concentrate contains 21.66% of Cu, and the Cu recovery rate is 86.57%; the sulfur concentrate contains 51.15% of S, and the S recovery rate is 85.92%.

[0049]The raw ore is beneficiated using the existing similar technology, and the beneficiation results are as follows: by weight percentage, the obtained copper concentrate contains 19.23% Cu, and th...

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Abstract

The invention discloses an inhibitor and an ore dressing method of high-sulfur refractory copper and sulfur ore. The inhibitor is composed of lime and sodium hexametaphosphate at a mass ratio of 2.0-4.0:0.2-0.6 through mixing. The ore dressing method comprises following steps: raw ore grinding, copper sulfur bulk flotation coarse roughing, copper sulfur bulk flotation scavenging, copper sulfur bulk rough concentrate secondary grinding, copper sulfur bulk rough concentrate refining and refining scavenging, copper sulfur bulk concentrate separating coarse roughing, and copper sulfur separating refining. According to the ore dressing method, bulk rough concentrate secondary grinding is carried out, and then bulk flotation refining is carried out, so that further removing of a part of gangue is realized; a high efficiency inhibitor is adopted for reinforcement of inhibition on iron sulfide ore, and elimination activation of unavoidable ions in ore pulp on ferric sulfide ore, and at last, high efficiency separation of copper sulphide ore, ferric sulfide ore, and gangue is realized. The ore dressing method is simple and convenient; agent consumption amount is reduced; waste water high alkalinity problem is solved; copper sulfur separation effect is excellent; at laste, high grade copper concentrate and sulfur concentrate are obtained; and the ore dressing method is suitable for popularization and applications.

Description

technical field [0001] The invention relates to a beneficiation technology of copper-sulfur ore, in particular to an inhibitor and a beneficiation method of high-sulfur refractory copper-sulfur ore. Background technique [0002] Copper sulfide minerals have a close symbiotic relationship with iron sulfide minerals (marcasite, pyrite, pyrrhotite, arsenopyrite, etc.), among which high-sulfur copper ores have a high content of iron sulfide minerals, especially some Iron sulfide minerals are "difficult to inhibit" and "difficult to activate", which makes the flotation process complicated. [0003] In addition, lime, as a copper-sulfur separation inhibitor, consumes a lot in the process of copper-sulfur separation flotation, and there are many disadvantages in the large-scale use of lime: ①In industrial production, it is used in a large amount, and it is prone to pipe plugging and scaling; ②The mineral processing wastewater is alkaline High concentration and high cost of wastewa...

Claims

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Application Information

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IPC IPC(8): B03D1/018B03D103/02B03D101/06B03D101/02
Inventor 万丽周少珍曾克文孙志健于洋胡志凯王荣生钱志博苏建芳
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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