Magnesia is the main refractory material for furnaces in the steel, cement, glass and other industries. Most of the high-grade sintered magnesium in the international market is extracted from seawater and brine. The price is high and the production capacity is difficult to meet the needs of the industry. Take control. A few days ago, the "ultra-pure magnesium" jointly developed by Northeastern University, Liaoning University of Science and Technology and LNJC Group successfully achieved mass production in Yingkou. The products reached the international level and filled the gap of domestic high-grade sintered magnesia.
"Ultra-pure magnesium" uses the world's first new process to convert waste ore and low-grade magnesium ore into refractory with high added value-ultra-high-purity magnesia through processes such as flotation, light burning and reburning. As a result, China's magnesium refractory industry has shifted from mastering resources to mastering core technologies, solving the problem of insufficient high-grade sintered magnesium production capacity in the global magnesium refractory industry, breaking the foreign technology monopoly.
The "ultra-pure magnesium" product refined by the new process has a magnesia purity higher than 98% and a bulk density of 3.40 g / cm3. This achievement has also obtained 4 national invention patents for beneficiation and purification, flash boiling light burning, ball pressing and high temperature calcination.
Previously, China could only produce "high-purity magnesium" with a purity of 97%, and an increase of one percentage point meant that prices would increase by 3 to 4 times. Insiders said that extracting more than 98% magnesite from magnesite ore requires refining from high-quality magnesite. Although China is the country with the most abundant magnesite resources in the world, it can satisfy the market The demand for super-grade ore production is less than 20% of the total mining.
With the unremitting efforts of scientific researchers, the company can extract magnesia that meets and exceeds "high-purity magnesia" from low-grade magnesite or waste magnesite. At the same time, it has solved a large number of low-grade magnesite The waste of resources caused by the abandonment and the situation of occupying a large amount of land, thus achieving "turning waste into treasure" and "eat dry and squeeze". After the "ultra-pure magnesium" project reaches production, it can "eat up" more than 2.6 million tons of waste and low-grade magnesite ore each year.