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Method for roguing and purifying low-grade magnesite

A purification method and magnesite technology, which is applied in the field of flue gas purification, can solve the problems of poor impurity removal effect of magnesite, and achieve the effects of easy control of process parameters, safe production, and simple equipment structure

Inactive Publication Date: 2017-04-19
营口镁质材料研究院有限公司
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  • Application Information

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Problems solved by technology

[0004] The present invention mainly aims at the technical problem of poor impurity removal effect of magnesite in the prior art, and provides a method for removing impurities and purifying low-grade magnesite

Method used

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Embodiment Construction

[0015] Below in conjunction with embodiment the present invention is described in detail:

[0016] A method for removing impurities and purifying low-grade magnesite in the embodiment of the present invention comprises the following steps:

[0017] (1) Using low-grade magnesite as raw material, filter the magnesite to remove large impurities in the magnesite;

[0018] (2) Send the magnesite into the pulverizer for crushing, the crushing parameters are: the grinding gas volume is 6~10m 3 / min, the air pressure is 1Mpa;

[0019] (3) Put the pulverized magnesite into reverberatory furnace, rotary kiln, suspension furnace, fluidized bed furnace or tunnel kiln and fully roast at 600-1000°C;

[0020] (4) Add water to hydrate the lightly burned magnesium oxide and self-grind;

[0021] (5) Finally, the magnesium hydroxide powder is calcined twice at 600-900°C to obtain impurity-removed and purified light-calcined magnesium oxide powder.

[0022] Wherein, the magnesium oxide has a ...

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Abstract

The invention discloses a method for roguing and purifying a low-grade magnesite. The method comprises the steps of (1) adopting the low-grade magnesite as a raw material, and filtering the magnesite to filter out large impurities in the magnesite; (2) feeding the magnesite into a crusher and crushing the magnesite with the crushing parameters thereof as follows: grinding capacity: 6-10 m<3> / min, air pressure: 1 Mpa; (3) putting the crushed magnesite into a reverberatory furnace, a rotary kiln, a suspension furnace, a fluidized bed furnace or a tunnel kiln at 600 to 1000 DEG C to fully roast the crushed magnesite; (4) hydrating the lightly roasted magnesium oxide with water, and conducting the self-grinding; (5) finally, roasting magnesium hydroxide powders for a second time at 600 to 900 DEG C to obtain rogued and purified lightly roasted magnesium oxide powders. The above method improves the impurity-removing efficiency of magnesium oxide, and increases the purity of magnesium oxide.

Description

technical field [0001] The invention relates to the field of flue gas purification, in particular to a method for removing impurities and purifying low-grade magnesite. Background technique [0002] Magnesite is a commonly used mineral in industry. my country's magnesite resources are abundant and widely distributed, ranking first in the world. In recent years, with the increase of mining volume, super magnesite has shown a gradual depletion trend. Therefore, how to efficiently utilize low-grade magnesite and improve the utilization rate of magnesite resources has become one of the important issues in the magnesite material industry. [0003] In the smelting process of magnesite, in order to improve the purity of magnesium oxide, it usually needs to go through the impurity removal process. The impurities that affect the quality of magnesium oxide mainly include various heavy metal impurities and unoxidized raw material impurities. Regarding the purification method of lo...

Claims

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Application Information

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IPC IPC(8): C04B2/10C01F5/08B82Y30/00
CPCC04B2/102B82Y30/00C01F5/08C01P2004/64C01P2006/80
Inventor 曾卫军
Owner 营口镁质材料研究院有限公司
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