High-Activity Magnesium Oxide with Purity Above 95%: Applications in Mining Industry BY:Cherry
High-Activity Magnesium Oxide with Purity Above 95%: Applications in Mining Industry
High-activity magnesium oxide with a purity of more than 95% (abbreviated as high-activity MgO ≥95%) is an inorganic functional material with excellent chemical reactivity, adsorption capacity and high-temperature stability, which is specially optimized for the harsh working conditions of the mining industry. Different from ordinary magnesium oxide, it is prepared by low-temperature calcination, precipitation or hydrothermal processes, which avoids the loss of activity caused by high-temperature sintering, retains a porous structure and high surface energy, and its iodine absorption value ranges from 80 to 160 mg/g, citric acid activity value from 20 to 45 seconds, and specific surface area from 30 to 80 m²/g. With a magnesium oxide content of 95% to 97.9%, it balances high performance and cost-effectiveness, making it an indispensable core material in modern mining operations, especially in mineral processing, mine waste treatment and mining equipment protection, and its application scope is expanding with the upgrading of mining technology and the tightening of environmental protection policies.
In the mining industry, high-activity magnesium oxide with purity above 95% has a wide range of applications, covering key links such as mineral processing, mine waste treatment, mining equipment protection, and auxiliary operations, and its unique performance brings obvious economic and environmental benefits to mining enterprises. Its core application focuses on mineral processing, where it plays an irreplaceable role in flotation separation, desilication, desulfurization and impurity removal, directly affecting the quality and recovery rate of mineral products. In flotation separation, which is a key link in mineral processing, high-activity magnesium oxide is used as a regulator and activator to adjust the pH value of the flotation pulp, improve the surface activity of target minerals, enhance the adhesion between minerals and flotation reagents, and thus improve the separation efficiency of useful minerals and gangue. For non-ferrous metal minerals such as copper, lead, zinc, nickel and cobalt, this material can effectively activate the flotation of target minerals, inhibit the floating of gangue minerals such as quartz and calcite, and increase the recovery rate of useful minerals by 5% to 12% compared with ordinary magnesium oxide.
In the flotation of copper-cobalt ores, especially in the hydrometallurgical process of copper-cobalt ores in the Democratic Republic of the Congo, high-activity magnesium oxide with purity above 95% is used as a precipitant to separate cobalt from the leachate, forming nickel hydroxide and cobalt hydroxide with good crystal form, which are easy to filter and wash, with fast filtration speed and low filter cake water content, directly determining the quality of the final product. In the processing of nickel-cobalt laterite ores, which are important raw materials for new energy batteries, this material is an ideal precipitant for nickel precipitation. Compared with sodium hydroxide and other precipitants, it does not introduce additional impurity ions into the system, and its theoretical unit consumption is only 0.68 tons, which has obvious cost advantages after comprehensively considering purity, transportation and waste treatment costs. In addition, in the flotation of iron ore, bauxite and other non-ferrous metals, high-activity magnesium oxide is used as a desilication agent and desulfurizer, which can effectively remove silicon and sulfur impurities in the ore, improve the purity of the concentrate, and lay a solid foundation for the subsequent smelting process.
Mine waste treatment is another core application field of high-activity magnesium oxide with purity above 95%, which plays a key role in environmental protection and resource recycling in the mining industry. Mining activities will generate a large amount of waste, including acid mine drainage, tailings and waste gas, which will cause serious environmental pollution if not properly treated. High-activity magnesium oxide, with its strong alkalinity and adsorption capacity, is an efficient treatment agent for acid mine drainage. It can neutralize the acidity of the drainage (adjust the pH value to 6.5-8.5, which meets the discharge standard), and adsorb heavy metal ions such as lead, cadmium, copper and arsenic in the water through physical adsorption and chemical reaction, with an adsorption capacity of 30-60 mg/g, effectively reducing the pollution of heavy metals to soil and groundwater. In the treatment of tailings, it can be mixed with tailings to solidify heavy metals, prevent heavy metal leaching, and at the same time improve the strength of tailings, which is conducive to the comprehensive utilization of tailings (such as filling goafs) and reducing the occupation of land resources.
In terms of mining equipment protection, high-activity magnesium oxide with purity above 95% is used to prepare high-temperature refractory coatings and linings, which are applied to mining equipment such as crushers, ball mills and smelting furnaces. Due to its excellent high-temperature resistance (melting point up to 2852℃) and wear resistance, it can effectively protect the inner wall of the equipment from high temperature, friction and corrosion, extend the service life of the equipment by 30% to 50%, and reduce the maintenance cost and downtime of the equipment, thus improving the overall production efficiency of the mining enterprise. In addition, it can also be used as a dust suppressant in mining operations. When mixed with water and sprayed on the surface of the mining area and transport road, it can form a stable protective film, reduce dust pollution, improve the working environment of the mining area, and comply with the environmental protection requirements of the mining industry.
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