Multi-stage segmental ore-dressing, purifying, and comprehensive utilization method for low-grade magnesite

A magnesite, low-grade technology, applied in recycling technology, chemical instruments and methods, wet separation, etc., can solve the problem that low-grade magnesite is not effectively utilized, high-grade magnesite resources are reduced, and it is difficult to meet Market demand and other issues, to achieve the effects of cheap raw materials, low production costs, and high output rates
CN103406196AInactive Publication Date: 2013-11-27LIAONING DONGHE NEW MATERIAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LIAONING DONGHE NEW MATERIAL CO LTD
Publication Date
2013-11-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a multi-stage segmental ore-dressing, purifying, and comprehensive utilization method for low-grade magnesite. The method comprises the following steps of: crushing low-grade magnesite, ore grinding, grading, sorting and purifying, light burning of products after ore dressing, high-purity magnesium oxide preparation by magnesium salts converted by useful components after light burning, fused magnesite production, forsterite preparation by tailings, waste heat recovery for ore-dressing heating, and fused magnesite preparation by cake pressing of recovery dust. Compared with the prior art, the method has the beneficial effects of realizing zero release of tailings of magnesite, efficiently utilizing ore resources, saving energy by virtue of the adopted multi-layer shaft furnaces and multi-layer roasting and maximizing the economic benefits; the method has the advantages of simple process, low production cost, high product purity, high yield and no environment pollution.
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Description

technical field

[0001] The invention relates to the field of ore dressing, in particular to a method for the multi-stage segmented ore dressing, purification and comprehensive utilization of low-grade magnesite. Background technique

[0002] Magnesite is a very important non-metallic mineral, widely used in metallurgy, building materials and chemical industries. my country's magnesite is famous for its large quantity and high quality. However, due to the long-term mining method of abandoning the poor and mining for high quality, the resources of high-grade magnesite in my country are decreasing day by day, and a large amount of low-grade magnesite is abandoned and stockpiled without effective utilization , resulting in a huge waste of resources. However, the resources of high-grade magnesite are decreasing day by day, and it is difficult to meet the demand of the market. It is urgent to find a suitable purification method for low-grade magnesite. Contents of the invention ...

Claims

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