Separation method of pyrite and pyrrhotite

A pyrrhotite and separation method technology, applied in the direction of magnetic separation, solid separation, chemical instruments and methods, etc., can solve the problem of inability to achieve effective separation of pyrite and pyrrhotite, and inability to obtain high-grade pyrite concentrate Mining and other problems, to achieve the effect of reducing floatability and efficient separation

Pending Publication Date: 2021-06-25
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a kind of separation method of pyrite and pyrrhotite, to solve the situation that pyrite and pyrrhotite coexist in the prior art, can't realize pyrite and pyrrhotite The effective separation of ore, and thus the problem of inability to obtain high-grade pyrite concentrate

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  • Separation method of pyrite and pyrrhotite
  • Separation method of pyrite and pyrrhotite

Examples

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Effect test

Embodiment 1

[0035] This example is the sulfur concentrate obtained by flotation in a lead-zinc-sulfur separation plant. Gangue minerals such as silicate and quartz. Among them, the pyrite content is 45%, the pyrrhotite content is 50%, and the sulfur grade is 41.61%.

[0036] The symbiotic ore of pyrite and pyrrhotite is first separated by magnetic separation to obtain magnetic separation concentrate and magnetic separation tailings, wherein the magnetic field strength is 3500Oe, and the magnetic separation concentrate is the first part of pyrrhotite.

[0037] The magnetic separation tailings and FeCl 3 Mixing and grinding treatment, wherein, the grinding concentration is 65%, relative to each ton of magnetic separation tailings, FeCl 3 The dosage is 150g, the grinding fineness is 91.22% of ore grains with particle size less than 0.045mm, the grinding medium is iron medium, and the grinding time is 10min.

[0038] The pulp, dixanthate and No. 2 oil are mixed and subjected to separation ...

Embodiment 2

[0042] This example is a sulfur concentrate obtained by sequentially flotation zinc and sulfur in a high-sulfur copper-lead-zinc ore using a copper-lead mixed flotation process. The main mineral in the obtained sulfur concentrate is pyrrhotite, and its content is 75%. Followed by pyrite, its content is 21%, and the rest are gangue minerals such as quartz, feldspar and dolomite. In particular, the pyrrhotite content of the sulfur concentrate is relatively high, and the sulfur grade of the sulfur concentrate is only 39.38%.

[0043] The symbiotic ore of pyrite and pyrrhotite is first separated by magnetic separation to obtain magnetic separation concentrate and magnetic separation tailings, wherein the magnetic field strength is 4000Oe, and the magnetic separation concentrate is the first part of pyrrhotite.

[0044] The magnetic separation tailings and FeCl 3 Mixing and grinding treatment, wherein, the grinding concentration is 65%, relative to each ton of magnetic separation ...

Embodiment 3

[0049] This example is a sulfur concentrate obtained by using copper priority flotation and copper flotation tailings sulfur separation in a copper-sulfur ore. The main mineral in the sulfur concentrate is pyrite, with a content of 70.5%, followed by pyrrhotite ore, its content is 26%, the rest is gangue minerals such as quartz, the sulfur grade of this sulfur concentrate is 44.59%.

[0050] The symbiotic ore of pyrite and pyrrhotite is first separated by magnetic separation to obtain magnetic separation concentrate and magnetic separation tailings, wherein the magnetic field strength is 3000Oe, and the magnetic separation concentrate is the first part of pyrrhotite.

[0051] The magnetic separation tailings and FeCl 3 Mixing and grinding treatment, wherein, the grinding concentration is 65%, relative to each ton of magnetic separation tailings, FeCl 3 The dosage is 100g, the grinding fineness is 91.11% of ore grains with particle size less than 0.045mm, the grinding medium i...

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Abstract

The invention provides a separation method of pyrite and pyrrhotite. The method comprises the following steps of carrying out magnetic separation on paragenetic mineral aggregate of the pyrite and the pyrrhotite to obtain magnetic concentrate and magnetic tailings; and mixing the magnetic tailings and FeCl3, performing flotation separation, and obtaining flotation concentrate and flotation tailings, wherein the magnetic concentrate is a first part of pyrrhotite, the flotation concentrate is the pyrite, and the flotation tailings are a second part of pyrrhotite. According to the method, the pyrite and the pyrrhotite are separated more efficiently in a magnetic separation-flotation combined manner, particularly magnetic separation and flotation are carried out in sequence, and meanwhile the deep inhibition effect of the FeCl3 on the pyrrhotite is combined, so that the high-grade pyrite concentrate is obtained.

Description

technical field [0001] The invention relates to the field of nonferrous metals, in particular to a method for separating pyrite and pyrrhotite. Background technique [0002] Pyrite (FeS 2 ) with a theoretical S content of 53.33%, is the most widely distributed sulfide mineral in the earth's crust, and is the main raw material for the production of sulfuric acid and sulfur in my country. Pyrite has good application prospects in many fields such as solar cell materials, petrochemical industry and heavy metal wastewater treatment. For example, high-purity pyrite can be used in lithium batteries, FeS 2 The higher the purity, the smaller the particle size, Li / FeS 2 The battery discharge capacity increases more significantly. And pyrrhotite (Fe 1-X S) Because its sulfur content changes with the vacancy of iron atoms, it is generally difficult for the S content to exceed 40%, and the low sulfur content causes the economic utilization value of pyrrhotite to be lower than that o...

Claims

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Application Information

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IPC IPC(8): B03B9/00B03C1/00B03D1/00
CPCB03B9/00B03C1/00B03D1/00
Inventor 刘志国康金星于传兵宋磊郭素红王传龙王鑫王亚运
Owner CHINA ENFI ENGINEERING CORPORATION
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