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Low-cost mineral processing technology for high-silicon high-calcium magnesite

A high-calcium magnesite, low-cost technology, applied in the field of beneficiation, can solve the problems of vulnerable equipment, large floor space, small processing capacity, etc., and achieve the effect of saving basic investment, less floor space, and small size.

Active Publication Date: 2017-12-01
中冶北方(大连)工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this flotation process are that the mechanical agitation flotation machine has a complex structure and a large area; the beneficiation enrichment ratio is small, the processing capacity is small; the maintenance and operation are complicated, the equipment is fragile, and the power consumption is large.

Method used

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  • Low-cost mineral processing technology for high-silicon high-calcium magnesite

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Embodiment 1

[0029] The present invention is a low-cost beneficiation process for high-silicon and high-calcium magnesite. The main chemical components of the processed high-silicon and high-calcium magnesite raw ore are: 46.20% of magnesium oxide, 2.28% of silicon dioxide, and 1.92% of calcium oxide. High-pressure roller mill, to obtain medium crushing products with a particle size of less than 2mm, and feed the medium crushed products with a particle size of less than 2mm into a first-stage grid-type ball mill for grinding, and the particle size of the first-stage grid-type ball mill is -0.076mm 40%, the particle size of the first-stage grid ball mill is -0.076mm, accounting for 40%, and the grinding products are fed into the closed-circuit grinding operation composed of the second-stage grid-type ball mill and the spiral classifier, and the particle size of the second-stage grid-type ball mill is -0.076mm 70-80% of the overflow product enters the next process of flotation, and the spiral...

Embodiment 2

[0031] The present invention is a low-cost beneficiation process for high-silicon and high-calcium magnesite. The main chemical components of the processed high-silicon and high-calcium magnesite raw ore are: 45.80% of magnesium oxide, 2.28% of silicon dioxide, and 1.50% of calcium oxide. High-pressure roller mill, the product particle size is below 2mm, and the medium crushing product with a product particle size below 2mm is obtained, and the medium crushing product with a particle size below 2mm is fed into a first-stage grid-type ball mill for grinding, and the grinding product of the first-stage grid-type ball mill The particle size is -0.076mm, which accounts for 45%, and the particle size of the first-stage grid type ball mill is -0.076mm, which accounts for 45%. The ball mill particle size is -0.076mm, accounting for 70-80% of the overflow product enters the next process of flotation, and the spiral classifier returns to the second-stage ball mill; the second-stage latt...

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Abstract

The invention relates to a low-cost mineral processing technology for high-silicon high-calcium magnesite. The low-cost mineral processing technology comprises the steps of raw material crushing operation, grinding operation and flotation operation. The low-cost mineral processing technology is characterized by comprising the following specific technological steps that raw magnesite is crushed through a medium crusher, grinding operation is conducted through a closed circuit grinding assembly composed of a primary grate ball mill, a secondary grate ball mill and a spiral grading machine, an overflow product with the particle size of 70-80% of the overflow product being -0.076 mm is obtained and subjected to flotation operation adopting primary reverse flotation and primary obverse floatation, the magnesite comprising 46.50-47.00% of magnesium oxide, 0.80-1.50% of silicon dioxide and 0.90-2.00% of calcium oxide is obtained, wherein the concentrate yield is 82.00-90.00%, and the recovery rate is 81.45-85.00%. The low-cost mineral processing technology has the advantages that flotation operation adopting only primary reverse flotation and primary obverse floatation, thus, the grade of the silicon dioxide in the high-silicon high-calcium magnesite can be lowered to 0.5-1.5% from 2%, the content of silicon is lowered by 50% or above, the grade of the calcium oxide is lowered to 1-2% from 3%, and the content of calcium is lowered by 50% or so.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a low-cost mineral processing process for high-silicon and high-calcium magnesite. Background technique [0002] Magnesite is one of the advantageous mineral resources in my country, and its reserves, output, and export volume all rank first in the world. The proven reserves of magnesite in the world are about 13 billion tons. my country's proven reserves are about 3.12 billion tons, accounting for 25%-30% of the world's proven reserves, mainly distributed in Liaoning and Shandong. The 12 production areas in Liaoning have reserves of 2.57 billion tons, accounting for about 86% of my country's total reserves. Magnesite is widely used in refractory materials, military industry, national defense technology, machinery manufacturing, automobile, textile, electronics and other fields. [0003] At present, due to the lack of planning of some miners, they mine a...

Claims

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Application Information

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IPC IPC(8): B03B7/00
CPCB03B7/00
Inventor 孟光栋韩卫涛闫文光陈江华宋峰汪明月
Owner 中冶北方(大连)工程技术有限公司
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