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Mineral processing technology for producing high-quality iron concentrate from iron ore

A technology of iron concentrate and iron ore, which is applied in the field of beneficiation process for the production of high-quality iron concentrate, can solve the problems of high loss of iron concentrate, poor separation effect, and recovery rate of less than 80%, so as to save grinding cost, improving the degree of oxidation, and reducing the effect of grinding energy consumption

Active Publication Date: 2019-09-10
内蒙古薪宝高科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, mineral processing workers have carried out a lot of research work on the removal of pyrrhotite. The method of removing pyrrhotite is generally flotation. At present, there are many studies on flotation activators, inhibitors and collectors. However, the separation effect of pyrrhotite with a deep oxidation degree is not good, especially for the purchased Mongolian iron ore with high sulfur content that often changes in ore properties, it is difficult to reduce the sulfur in the iron concentrate to below 0.4%. Moreover, the loss of iron concentrate is relatively large, and the recovery rate is less than 80%.

Method used

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  • Mineral processing technology for producing high-quality iron concentrate from iron ore

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A beneficiation process for producing high-quality iron concentrate from Mongolian iron ore mainly includes the following parts:

[0022] 1. The Mongolian iron ore is firstly subjected to one-stage grinding (mill model Φ3.2×4.5m), and the first-stage grinding product enters the classifier for a classification operation to obtain a graded sand settling product and a graded overflow product;

[0023] 2. The primary graded grit products obtained by the above steps are subjected to secondary grinding (mill model Φ3.6×4.0m), and the secondary grinding products are returned to the primary classification for inspection and classification; primary grading overflow products enter the cyclone The secondary classification operation is carried out by the device, and the secondary classification grit product and the secondary classification overflow product are obtained;

[0024] 3. The secondary graded grit settling product obtained by the above steps is subjected to three-stage gr...

Embodiment 2

[0031] A beneficiation process for producing high-quality iron concentrate from Mongolian iron ore mainly includes the following parts:

[0032] 1. The Mongolian iron ore is firstly subjected to one-stage grinding (mill model Φ3.2×4.5m), and the first-stage grinding product enters the classifier for a classification operation to obtain a graded sand settling product and a graded overflow product;

[0033] 2. The primary graded grit products obtained by the above steps are subjected to secondary grinding (mill model Φ3.6×4.0m), and the secondary grinding products are returned to primary classification for inspection and classification; primary grading overflow products enter the cyclone The secondary classification operation is carried out by the device, and the secondary classification grit product and the secondary classification overflow product are obtained;

[0034]3. The secondary graded grit settling product obtained by the above steps is subjected to three-stage grindin...

Embodiment 3

[0041] A beneficiation process for producing high-quality iron concentrate from Mongolian iron ore mainly includes the following parts:

[0042] 1. The Mongolian iron ore is firstly subjected to one-stage grinding (mill model Φ3.2×4.5m), and the first-stage grinding product enters the classifier for a classification operation to obtain a graded sand settling product and a graded overflow product;

[0043] 2. The primary graded grit products obtained by the above steps are subjected to secondary grinding (mill model Φ3.6×4.0m), and the secondary grinding products are returned to primary classification for inspection and classification; primary grading overflow products enter the cyclone The secondary classification operation is carried out by the device, and the secondary classification grit product and the secondary classification overflow product are obtained;

[0044] 3. The secondary graded grit settling product obtained by the above steps is subjected to three-stage grindi...

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Abstract

The invention relates to a mineral processing technology for producing high-quality iron ore concentrate from iron ore and belongs to the technical field of mineral engineering. More pyrrhotite is contained in the iron ore of Mongolia and enters iron ore concentrate during magnetic separation, so that cotent of sulfur in the iron ore concentrate is higher, and utilization of iron ore concentrate is limited. According to the invention, the technology of ore grinding-iron selection of magnetic separation-flotation of pyrrhotite is adopted; at first, most of monomers of iron mineral are separatedto improve the oxidization degree of the surface of pyrrhotite particles; efficient and reasonable aluminum sulfate or the mixture of aluminum sulfate, sodium phosphate and ammonium fluosilicate is adopted as an activator and a pH regulator of pyrrhotite to activate the mineral surface of pyrrhotite, and the electrical charge state of the surface of mineral in ore pulp is better controlled; a combined collecting agent with better selectivity and collecting performance is adopted to collect pyrrhotite with different oxidization degrees simultaneously, so that the sulfur content in iron ore concentrate is greatly reduced, high-quality iron ore concentrate is obtained and magnetite and pyrrhotite are effectively separated.

Description

technical field [0001] The invention belongs to the technical field of mining engineering, and in particular relates to a beneficiation process for producing high-quality iron concentrate from iron ore. Background technique [0002] Most of the Mongolian iron ore is magnetite ore, which has a high total iron content and belongs to iron-rich ore, but its utilization is limited due to the high sulfur content. The sulfur-containing minerals in Mongolian iron ore are generally pyrrhotite. Because pyrrhotite is magnetic, it enters the iron concentrate along with the magnetite during the magnetic separation of iron ore, resulting in the sulfur in the iron concentrate Above 2.0%, sometimes even as high as above 3%, has a serious impact on the quality of iron concentrate. The sulfur-containing minerals in the iron concentrate not only pollute the atmosphere during the sintering process, but more lime must be added to ensure the desulfurization effect, resulting in an increase in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03D1/002B03D101/00B03D101/02B03D103/02
Inventor 云伟云文杰
Owner 内蒙古薪宝高科技开发有限公司
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