Beneficiation method for improving grade of manganese in rhodochrosite ores

A beneficiation method and rhodochrosite technology, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problem of small embedded particle size, difficulty in enriching useful components in ore, and insufficient increase in the grade of rhodochrosite concentrate. major issues

Inactive Publication Date: 2012-01-04
长沙达华矿业技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some low-grade rhodochrosite ores, the mineral crystal grains are staggered and clustered, and the embedded particle size is small. It is difficult to enrich the useful components in the ore by traditional mineral processing methods.
Generally speaking, the grade of rhodochrosite concentrate obtained after the traditional method of beneficiation is not greatly improved, and the recovery rate is generally less than 80%.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: Rhodochrosite is taken from a mine in Laibin, Guangxi, and its composition characteristics are shown in Table 1.

[0013] Table 1 Chemical composition of rhodochrosite (%)

[0014] Element

[0015] Take 5Kg of rhodochrosite raw ore, after crushing and screening to obtain ore powder with a particle size of less than 25mm, carry out microwave roasting at a roasting temperature of 750°C and a roasting time of 25 minutes; after the roasting is completed, add water to the ore powder, and wet grind until the particle size is less than 1mm , the solid mass concentration in the grinding process is 70%, and the spiral chute is used to sort the grinding pulp to obtain manganese concentrate, and the additional water and pulp during sorting are fed into the spiral chute at the same time, and the solid mass concentration in the sorting process is The manganese grade in manganese concentrate is 21.5%, and the manganese recovery rate is 85.5%.

Embodiment 2

[0016] Example 2: Rhodochrosite is taken from a mine in Yiyang, Hunan, and its composition characteristics are shown in Table 2.

[0017] Table 1 Chemical composition of rhodochrosite (%)

[0018] Element

[0019] Take 10Kg of rhodochrosite raw ore, after crushing and screening to obtain ore powder with a particle size of less than 25mm, carry out microwave roasting, the roasting temperature is 800°C, and the roasting time is 30 minutes; after the roasting is completed, add water to the ore powder, and wet grind until the particle size is less than 1mm , the solid mass concentration in the grinding process is 65%. The spiral chute is used to sort the grinding pulp to obtain manganese concentrate. The added water and the pulp are fed into the spiral chute at the same time during the sorting process. The solid mass concentration in the sorting process is The manganese grade in manganese concentrate is 23.5%, and the manganese recovery rate is 88.0%.

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Abstract

The invention discloses a beneficiation method for improving the grade of manganese in rhodochrosite ores. The method comprises the following steps: crushing raw rhodochrosite ores, then putting the crushed powdered ores in an industrial microwave oven to carry out microwave roasting to obtain roasted powdered ores; adding water into the roasted powdered ores so as to carry out wet grinding on the powdered ores, then carrying out separation on the obtained grinded ore pulp by using a spiral chute to obtain manganic concentrates, wherein compared with the grade of manganese in the raw ores, the grade of manganese in the manganic concentrates can be increased by 5-15%, and the recovery rate of manganese is 85-90%. The beneficiation method disclosed by the invention has the following advantages that: (1) through roasting raw rhodochrosite ores by using microwaves, the monomer dissociation of monomers of various minerals in the ores can be effectively promoted, and no harmful pollution gas is produced in the process of roasting; (2) separation and enrichment is carried out on manganese minerals subjected to roasting by using a gravity separation method, and the separation method is clean and efficient without using any chemical agents; and (3) compared with the grade of manganese in raw ores, the grade of manganese in the obtained manganic concentrates can be increased by 5-15%, and the recovery rate of manganese is 85-90%.

Description

technical field [0001] The invention relates to a beneficiation method for improving the grade of manganese in rhodochrosite ore. Background technique [0002] Manganese is a very versatile metal. my country's manganese ore reserves are 640 million tons, and manganese metal reserves are 40 million tons, of which rhodochrosite accounts for about 73% of the total reserves, and is one of the important raw materials for the production of manganese series products. [0003] Rhodochrosite is a carbonate mineral, the main components include manganese carbonate, calcium carbonate, magnesium carbonate, quartz and so on. In some low-grade rhodochrosite ores, the mineral grains are interlaced and clustered, and the embedded particle size is small. It is difficult to enrich the useful components in the ore by traditional mineral processing methods. Generally speaking, the grade of the rhodochrosite concentrate obtained after the traditional method of beneficiation is not greatly impro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00
Inventor 莫益民王建平田学达
Owner 长沙达华矿业技术开发有限公司
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