Preparation method and application of metallurgical precipitation-grade magnesium oxide

A technology of magnesium oxide and magnesium oxide powder, applied in the direction of magnesium oxide, magnesium hydroxide, chemical instruments and methods, etc., can solve problems affecting the purity and activity of magnesium oxide, high calcium impurity content, loss of useful components, etc., to avoid useful Loss of components, reduction of environmental pollution, effects of activity and purity improvement

CN111732115AActive Publication Date: 2020-10-02辽宁镁誉新材料有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2020-10-02

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Abstract

The invention relates to a preparation method of metallurgical precipitation-grade magnesium oxide. The preparation method comprises the following steps: 1) crushing magnesite and carrying out light burning; 2) carrying out a hydration reaction decalcification process; 3) removing slag; 4) carrying out a filter pressing process; 5) carrying out magnesium hydroxide filter pressing; and 6) calciningmagnesium hydroxide powder into magnesium oxide by adopting a flash evaporation suspension calcining furnace. According to the metallurgical precipitation-grade magnesium oxide prepared by the preparation method provided by the invention, the activity and the purity are greatly improved, the contents of calcium and chlorine in the magnesium oxide are greatly reduced, and the metallurgical precipitation-grade magnesium oxide is applied to cobalt precipitation and nickel precipitation in a cobalt and nickel wet extraction smelting plant, so that a relatively good economic effect is achieved.
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Description

Technical field

[0001] The invention relates to the field of inorganic salt preparation, in particular to a preparation method and application of metallurgical precipitation grade magnesium oxide. Background technique

[0002] Hydrometallurgical precipitation grade magnesium oxide is a kind of light magnesium oxide powder. It is an odorless, tasteless and non-toxic white amorphous powder with good activity. The reaction rate is fast during the neutralization and precipitation process, and the precipitated product impurities obtained It has low content, good filtration performance and low production cost, and is widely used in hydrometallurgical processes.

[0003] For example, in the process of hydrometallurgical extraction of nickel and cobalt, precipitation-grade magnesium oxide is used to precipitate and separate nickel and cobalt from the solution. The process principle is as follows:

[0004] Magnesium oxide precipitation of cobalt and nickel:

[0005] MgO+H 2 O=Mg(HO) 2

[0006] ...

Examples

Embodiment Construction

[0031] The preparation method of metallurgical precipitation grade magnesium oxide of the present invention includes the following steps:

[0032] The invention provides a metallurgical precipitation grade magnesium oxide and a preparation method and application thereof. The activated magnesium oxide prepared by the method provided by the invention has higher purity and activity, and lower calcium content and chlorine content. In addition, in the present invention, the tail water is not discharged, and the magnesium oxide lost in the tail water is recovered.

[0033] The preparation method of metallurgical precipitation grade magnesium oxide of the present invention includes the following steps:

[0034] 1) Magnesite crushing and light burning: 40-240mm size ore is fired into 0-7mm particle magnesia powder through a mechanical shaft kiln, and the light burnt magnesia powder is mechanically finely ground into particles with a particle size of 200-325 mesh; Or crush the raw ore to 200...