Magnesium-manganese intermediate alloy, preparation method thereof and application of mixed salt

By using a specific process of manganese chloride and mixed salt to prepare magnesium-manganese master alloys, the problems of uneven distribution of manganese elements and low yield are solved, and high-quality and low-cost production of magnesium-manganese master alloys is achieved.

CN120796801APending Publication Date: 2025-10-17BAOTOU RESEARCH INSTITUTE OF RARE EARTHS
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Patent Information

Application Number
CN202510959126.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-11
Publication Date
2025-10-17

AI Technical Summary

Technical Problem

The existing magnesium-manganese master alloy production process suffers from uneven distribution of manganese elements, low yield and high cost. The use of electrolytic manganese metal flakes leads to increased impurities, resulting in poor alloy quality.

Method used

Manganese chloride is used as a raw material, mixed with mixed salt under specific temperature and conditions, and smelted. By controlling the heating, stirring and crushing steps, a dehydrated mixed salt is prepared, which is then smelted with metallic magnesium. A protective gas is used to reduce oxidation, and finally the mixture is degassed and allowed to stand to produce a magnesium-manganese master alloy.

Benefits of technology

The uniform distribution of manganese element in the magnesium-manganese master alloy is achieved, the manganese yield and alloy quality are improved, and the production cost is reduced.

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Abstract

The invention discloses a magnesium-manganese intermediate alloy, a preparation method of the magnesium-manganese intermediate alloy and application of mixed salt. The preparation method comprises the following steps: 1) mixing potassium chloride, sodium chloride and barium chloride to obtain mixed salt I; heating the mixed salt I until the mixed salt I is molten to obtain mixed salt liquid; 2) casting and cooling the mixed salt liquid to obtain a mixed salt ingot; crushing the mixed salt ingot to obtain mixed salt particles; 3) mixing manganese chloride with the mixed salt particles to obtain a mixed salt II; heating and dehydrating the mixed salt II to obtain dehydrated mixed salt II; (4) magnesium metal is heated to be molten, the dehydrated mixed salt II is added, smelting is conducted, and magnesium-manganese alloy liquid is obtained; and 5) degassing the magnesium-manganese alloy liquid, and standing to obtain the magnesium-manganese intermediate alloy. According to the magnesium-manganese intermediate alloy prepared through the method, segregation of the manganese element is small, and the yield of manganese is high.
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