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Mineral separation method for improving manganese grade in low-grade mixed manganese mine

A beneficiation method and low-grade technology, applied in chemical instruments and methods, magnetic separation, solid separation, etc., can solve the problems of difficult monomer dissociation, difficulty in manganese beneficiation recovery, etc., to promote monomer dissociation, irradiation time Short, low energy consumption

Inactive Publication Date: 2012-08-15
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main useful component in mixed manganese ore is rhodochrosite (MnCO 3 ), pyrolusite (MnO 2 ) and duromanganite (mMnO··MnO 2 ·nH 2 O), because the microcrystals of these minerals are staggered and clustered, and the distribution is even, therefore, compared with individual manganese oxide or manganese carbonate, it is more difficult for the useful minerals in mixed manganese ore to fully realize monomer dissociation, resulting in more efficient manganese beneficiation and recovery. difficulty

Method used

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  • Mineral separation method for improving manganese grade in low-grade mixed manganese mine
  • Mineral separation method for improving manganese grade in low-grade mixed manganese mine
  • Mineral separation method for improving manganese grade in low-grade mixed manganese mine

Examples

Experimental program
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Effect test

Embodiment 1

[0013] Example 1: The mixed manganese ore is taken from a mine in Guangxi. The multi-element analysis of the raw ore is shown in Table 1, and the phase analysis of the manganese minerals in the raw ore is shown in Table 2.

[0014] Table 1 Multi-element analysis of raw ore, %

[0015]

[0016] Table 2 Raw ore manganese mineral phase analysis, %

[0017]

[0018] Take 10kg of ore sample, crush and sieve to obtain ore powder with a particle size of less than 25mm, add 0.75kg of industrial coal powder with a particle size of less than 2mm, mix well and carry out microwave roasting at a roasting temperature of 650°C for a roasting time of 25 minutes; The product is transferred to cold water, and then wet-milled until the particle size is less than 0.1mm. When grinding, the pulp concentration is 70% solid mass fraction; after grinding, the pulp concentration is adjusted to 30% solid mass fraction. Strong magnetic separation is carried out on the machine to obtain magnetic se...

Embodiment 2

[0019] Example 2: The mixed manganese ore is taken from a mine in Hunan. The multi-element analysis of the raw ore is shown in Table 3, and the phase analysis of the manganese minerals in the raw ore is shown in Table 4.

[0020] Table 3 Raw ore multi-element analysis, %

[0021]

[0022] Table 4 Raw ore manganese mineral phase analysis, %

[0023]

[0024] Take 10kg of ore sample, crush and sieve to obtain ore powder with a particle size of less than 25mm, add 1.0kg of industrial coal powder with a particle size of less than 2mm, mix well and carry out microwave roasting at a roasting temperature of 600°C for a roasting time of 30 minutes; The product is transferred to cold water, and then wet-milled until the particle size is less than 0.1mm. The pulp concentration is 70% solid mass fraction during grinding; after grinding, the pulp concentration is adjusted to 25% solid mass fraction. Strong magnetic separation is carried out on the machine to obtain magnetic separat...

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Abstract

The invention discloses a mineral separation method for improving the manganese grade in a low-grade mixed manganese mine, which comprises the following steps: breaking the low-grade mixed manganese mine which simultaneously contains manganese oxide and manganese carbonate, and adding pulverized coal; putting the mixture of mine and coal into an industrial microwave oven for microwave roasting; controlling the roasting temperature of 600-650DEG C and the roasting time for 10-60minutes; after roasting is finished, carrying out wet-type mine grinding for the roasted product; carrying out the mine grinding till the granularity is less than 0.1mm; adding water to regulate the mine pulp concentration; and carrying out magnetic separation by a strong magnetic field magnetic separator to obtain the magnetic separation concentrate. Compared with the grade of the manganese in the mixed manganese mine, the grade of the manganese in the mixed manganese mine is improved by 5-10%, and the manganese recovery rate is more than 80%. The mineral separation method has the following beneficial effects of short irradiation time, low energy consumption and small reducing agent pulverized coal use amount because the mixed manganese mine is roasted by the microwave; when the manganese mineral is roasted by the microwave, an obvious local temperature difference is formed between the manganese minerals because the heating rates of components are different, and the monomer of the mineral can be effectively accelerated to separate; and the manganese grade of the low-grade mixed manganese mine can be improved by 5-10%. The mineral separation method is an effective mineral separation method for the low-grade mixed manganese mine.

Description

technical field [0001] The invention relates to a beneficiation method for improving the manganese grade in low-grade mixed manganese ore. Background technique [0002] Manganese is widely distributed in nature in the form of compounds, and the average content of manganese in the earth's crust is 0.1%, accounting for the 15th among known elements. Most of the manganese oxides and carbonate minerals available for industrial use. my country's manganese ore resources are characterized by more lean ore and less rich ore, and high impurity content. In order to meet the needs of manganese for industrial production, my country needs to import a large amount of high-grade manganese ore every year. [0003] According to my country's metallurgical manganese ore technical standards and manganese carbonate ore powder technical standards, the manganese grade of the fifth-grade product with the lowest quality requirements is greater than 18%. Therefore, manganese ore with a manganese gra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C1/005B03C1/02
Inventor 田学达习晓光张小云谷雨周丽丽
Owner XIANGTAN UNIV
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