As a non-renewable and indispensable strategic resource, restricting and reducing the exploitation of magnesite and improving the utilization rate of its resources will be the focus of all related work in the future. Therefore, enterprises with mining resources and conditions can be encouraged to carry out large-scale technological transformation and equipment renewal, or dispersed mining of raw materials and concentrated construction of several large raw material bases. Magnesia refractory material industry is a typical resource - based industry.
Since the reform and opening up of China in the 1980s, due to the rapid increase in the demand for magnesium raw materials and the low entry threshold of primary raw material processing, the rational development of magnesite has been seriously damaged. For economic reasons, magnesite premium ore sells for about five times as much as tertiary ore. Extensive mining, rich mining and poor mining phenomenon is serious, resulting in a great waste of resources, and more serious is mining and stripping imbalance. The author participated in the "spot adjustment" of 12 key magnesite mines in Liaoning Province in 2005, and estimated that the debt of rock stripping at that time amounted to more than 100 million tons. The situation has not changed fundamentally since then, resulting in difficulties in the mining of some high-quality ores. In recent years, super grade ore in the original sense has become very rare, the shortage of first grade ore, ore quality landslide leads to the average MgO content of magnesia decreased by more than 0.5%.
Therefore, in order to utilize limited resources reasonably and effectively, relevant laws and regulations must be earnestly implemented. Magnesite mines with annual mining capacity of more than 300,000 tons and old mines should be further integrated to carry out large-scale mining and intensive management. Carry out detailed survey of existing mining areas, mining according to the mining design, key mines make up for the debt of rock stripping, prolong the service life of mines; Spread beneficiation technology, comprehensive utilization of low - and medium-grade ore. At present, relevant enterprises have gradually realized that it is impossible to maintain the production of high-quality raw materials only by relying on raw ore production. Only by beneficiation and purification of raw ore, light burned magnesia can produce high grade primary raw materials and ensure the normal production of raw materials. Following the successful launch of flotation system in Haicheng magnesium Mine General Plant, a number of enterprises have built flotation projects, and other enterprises have begun to prepare, at the same time, the comprehensive utilization of flotation tailings is also under study. In the next 3 to 5 years, the promotion of magnesite flotation technology, the subsequent processing of high purity Mg (OH) 2 produced by Xizang apocrystalline magnesite and Qinghai "salt lake magnesium extraction" will provide high-quality raw material supply guarantee for China's magnesia production.