Address: Chenjia village, Dashiqiao, Yingkou, Liaoning
Magnesia refractory raw material industry is a typical resource-based industry. Ordinary fused magnesite index since the 1980s, China's reform and opening up, due to the rapid increase in demand for magnesite raw materials, processing of primary raw materials access threshold is low, resulting in the rational development of magnesite has been seriously damaged. Due to economic reasons, magnesite grade ore is priced at 5 times the price of grade three ore. Mining is extensive, and the phenomenon of mining rich and abandoning poor is serious, resulting in a great waste of resources, and even more serious is the mining and stripping imbalance. In 2005, the author participated in the "spot survey" of 12 key magnesite mines in Liaoning Province, estimating that the debts due from stripping at that time were over 100 million tons, but the situation has not changed fundamentally since then, resulting in difficulties in mining some high-quality ores. In recent years, the original meaning of the super-grade ore has been very rare, the shortage of first-grade ore, ore quality landslides resulting in the average MgO content of magnesia decreased by more than 0.5%.
Therefore, in order to rationally and effectively utilize the limited resources, it is necessary to conscientiously implement relevant laws and regulations, further integrate magnesite mines and old mines with annual mining capacity of more than 300,000 tons, carry out large-scale mining and intensive management, do a good job of detailed survey of existing mining areas, mining according to mining design, make up for debts due to rock stripping in key mines, and extend mines. Service life; popularizing mineral processing technology and comprehensive utilization of medium and low grade ores. At present, related enterprises have gradually realized that relying only on raw materials can not maintain the production of high-quality raw materials; only through ore dressing and purification of raw ores, can high-quality primary raw materials be produced and the normal production of raw materials be guaranteed. Following the successful start-up of flotation system in Haicheng Magnesium Mine General Works, many enterprises have built flotation projects, and other enterprises have begun to prepare, while the comprehensive utilization of flotation tailings is also under study.