Beneficiation method for strengthened recycling of fine-particle chromite

A beneficiation method and chromite technology, which is applied in the field of beneficiation to strengthen the recovery of fine-grained chromite, can solve the problems of difficult recovery of fine-grained chromite, achieve good emission reduction effects, improve resource utilization, and avoid tailings Difficulty settling effect

Inactive Publication Date: 2020-08-04
广东省资源综合利用研究所
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Problems solved by technology

[0007] The present invention provides a kind of beneficiation method for strengthening recovery of fine chromite in order to overcome the defect of fine chromite recovery described in the above prior art, the mineral processing method provided can effectively recycle fine chromite, and realizes The efficient recovery of chromite reduces the waste of resources and can achieve higher technical indicators

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  • Beneficiation method for strengthened recycling of fine-particle chromite

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Embodiment 1

[0035] This embodiment provides a kind of beneficiation method that strengthens recovery fine-grained chromite ore, and flow process is as follows figure 1 As shown, the specific steps are as follows:

[0036] S1. Select chrome ore from a certain place in South Africa. The main mineral composition is chromite, enstatite, anorthite, tremolite, diopside, quartz, albite, etc. Raw Cr 2 o 3 The grade is 19.68%, and the fineness -0.074mm accounts for 72.85% (-0.043mm accounts for 50.81%). Raw ore is subjected to high-gradient wet magnetic separation under the background magnetic field of 0.9T to obtain strong magnetic separation rough concentrate and strong magnetic separation tailings.

[0037] S2. adjust the pulp mass concentration of strong magnetic separation coarse concentrate to be 15%, adopt Cubic parabolic spiral chute, yield 24.34% after one rough and one sweep, Cr 2 o 3 Gravity separation concentrate and gravity separation tailings with a grade of 42.11% and a recov...

Embodiment 2

[0041] This embodiment provides a kind of beneficiation method that strengthens recovery fine-grained chromite ore, and flow process is as follows figure 1 As shown, the specific steps are as follows:

[0042] S1. Select chromium ore from a certain place in South Africa. The main minerals are chromite, enstatite, anorthite, tremolite, diopside, albite, biotite, etc. Raw Cr 2 o 3 The grade is 22.21%, and the fineness -0.074mm accounts for 50.54% (-0.043mm accounts for 31.07%). Raw ore is subjected to high-gradient wet magnetic separation under the background magnetic field of 0.9T to obtain strong magnetic separation rough concentrate and strong magnetic separation tailings.

[0043] S2. adjust the pulp mass concentration of strong magnetic separation coarse concentrate to be 18%, adopt Cubic parabolic spiral chute, yield 34.75% after one rough and one sweep, Cr 2 o 3 Gravity separation concentrate and gravity separation tailings with a grade of 42.15% and a recovery rat...

Embodiment 3

[0047] This embodiment provides a kind of beneficiation method that strengthens recovery fine-grained chromite ore, and flow process is as follows figure 1 As shown, the specific steps are as follows:

[0048] S1. Select chromium ore from a certain place in South Africa. The main minerals are chromite, enstatite, anorthite, tremolite, diopside, albite, biotite, etc. Raw Cr 2 o 3 The grade is 18.51%, and the fineness -0.074mm accounts for 86.77% (-0.043mm accounts for 70.87%). Raw ore is subjected to high-gradient wet magnetic separation under a background magnetic field of 1.0T to obtain strong magnetic separation coarse concentrate and strong magnetic separation tailings.

[0049] S2. adjust the pulp mass concentration of strong magnetic separation coarse concentrate to be 15%, adopt Cubic parabolic spiral chute, yield 4.06% after one rough and one sweep, Cr 2 o 3 Gravity separation concentrate and gravity separation tailings with a grade of 42.64% and a recovery rate ...

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Abstract

The invention discloses a beneficiation method for strengthened recycling of fine-particle chromite. The beneficiation method comprises the following steps that firstly, magnetic separation is conducted, raw ore is subjected to strong magnetic separation, and strong magnetic separation rough concentrates and strong magnetic separation tailings are obtained; secondly, reselection is conducted, thestrong magnetic separation rough concentrates obtained in the first step are subjected to reselection, and reselection concentrates and reselection tailings are obtained; and thirdly, flotation is conducted, the ore pulp mass concentration of the reselection tailings in the second step is adjusted, a collecting agent and a foaming agent are sequentially added, one-time rough fine selection is conducted, then, the flotation closed-loop process including at least three times of fine selection, at least two times of scavenging and middling sequential return is conducted, and flotation concentrates and flotation tailings are obtained. The magnetic-reselection-flotation combined technology is adopted in the beneficiation method, the fine-fraction chromite can be effectively recycled, comprehensive concentrate reselection is conducted, the final chromite concentrate Cr2O3 grade is 42% or above, the recycling rate is 80%-90%, the chromite resource is effectively recycled, the integral cost islow, and the high technology index can be reached.

Description

technical field [0001] The invention relates to the technical field of mineral processing, more specifically, to a mineral processing method for strengthening recovery of fine-grained chromite ore. Background technique [0002] Chromium is a scarce strategic resource in my country. For a long time, it has mainly relied on imports to solve domestic supply problems, and its dependence on foreign countries is high. With the sustained and rapid development of the national economy, my country's consumption demand for chromite continues to grow, and the gap between supply and demand continues to widen. In order to meet the domestic demand for chromite ore, in recent years, many companies have gone abroad to purchase or cooperate in the development of chromite ore resources. However, the resources of the purchased chromite ore mines are poor, and most of them are beneficiation tailings. big. [0003] At present, the chromite ore beneficiation process mainly adopts single magnetic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/00
CPCB03B9/00
Inventor 李强胡真邱显扬李汉文邹坚坚王成行汪泰姚艳清李沛伦杨凯志邱世澄时晗
Owner 广东省资源综合利用研究所
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