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Magnesium manufacturer: Does higher purity in high-purity magnesium correspond to fewer interphase constituents?
The higher the purity of high-purity magnesium, the fewer the interphase constituents?
Magnesite beneficiation can only remove SiO2; to achieve high purity, it is necessary to select ore with extremely low levels of Fe2O3, Al2O3, and CaO in order to effectively reduce the SiO2 content. However, if the goal is comprehensive resource utilization and grade enhancement, high-silica flotation must be employed.
High-purity magnesium oxide products exhibit increasingly higher purity, with fewer bound phases and greater instability, which does not necessarily make them suitable for all types of refractory materials.
High-Purity Magnesia from the Perspective of Market Demand
What is the market demand for magnesia sand with MgO content of ≥98%? The product mix of refractory raw materials should align with the demand structure of the raw-material market. From the perspective of ladle furnace requirements in steelmaking, with the exception of the trunnions and slag line on both sides of the converter, high-purity magnesia with MgO content of ≥98% should be used for producing external-sand products. Other application areas do not require this. High-purity magnesium Refractory products manufactured.
Magnesite refers to the general term for products obtained by one-step or two-step calcination of magnesite raw materials in shaft kilns, rotary kilns, and other furnaces, with the processing technology achieving sintering. Magnesium oxide is classified in various ways; among them, magnesium oxide produced by firing natural magnesite is called sintered magnesia, while magnesite melted in an electric arc furnace and then cooled to a molten state is referred to as fused magnesia. Magnesium oxide extracted from seawater is known as seawater-derived magnesium oxide.
Seawater-derived magnesium oxide and sintered magnesium oxide. Overseas production processes for high-purity magnesium oxide are advanced and yield products of high purity; however, due to relatively high production costs, they have not yet established a comprehensive competitive advantage.
High-purity magnesium In the market economy, operations remain stable, downstream demand has not yet changed, and manufacturers continue to maintain price stability.
Magnesium oxide can be classified into two main categories: natural magnesium oxide and seawater-derived or synthetic magnesium oxide. Natural magnesite is primarily sourced from natural magnesite deposits; however, due to limitations in the quality of the raw ore, it is difficult to produce high-purity grades. To date, seawater-derived magnesia has become the primary source of magnesia used in industrialized countries. The theoretical MgO content of magnesia is 47.3%, with other impurities including silica and iron.
Where are high-purity magnesia and electrofused magnesia primarily used?
High-purity magnesia It is produced by light calcination, fine grinding, dry pressing, and ultra-high-temperature oil-fired shaft kiln sintering of ultra-fine magnesite and heavy calcium-magnesium sand. The MgO content exceeds 97%, with low impurity levels, allowing for direct bonding among periclase crystals and resulting in a denser microstructure.
Electrofused magnesia is produced by high-temperature smelting in an electric arc furnace using fused magnesia or ultra-light calcined magnesia powder as raw materials. It features well-developed periclase crystals with large grain sizes, a high degree of direct bonding, a compact microstructure, strong slag resistance, and excellent thermal volume stability at elevated temperatures. Electrofused magnesia is primarily used as an excellent traditional raw material for the production of magnesia-carbon bricks, high-grade basic bricks, and unshaped refractory materials, and is classified according to its MgO content, ranging from 96% to 98%.
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Henan Mingmei Magnesium Technology Co., Ltd.
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Email:hnmingmei@163.com
Address: Hebi National Economic and Technological Development Zone, Henan Province
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