At the beginning of the commissioning of Sijiaying Iron Mine, the surface of the ore was highly weathered, which was not only low in grade but also serious in mud. After ore sorting, the grade can only reach 62%, the concentrate recovery rate is only 40%, and the tailings grade is as high as 20%. Due to the limitations of the technical conditions at the time, this part of the ore had to be temporarily stored. In the first phase of the stope, the ore stockpiles have gradually reached 6.3 million tons. Stockpiling ore not only takes up a lot of funds, but also to suppress the lower part 3 # ore body, affecting the mining expansion to help. To this end, Hebei Iron and Steel Group Mining Co., Ltd., in conjunction with relevant universities and research institutes, conducted research on ore properties, collector experiments and beneficiation processes on high-lime low-grade refractory hematite heaps. At the same time, Hebei Iron and Steel Group Mining Company investigated the whole process of the oxidized ore system of Sijiaying Iron Mine, and found out the main reasons for the low grade of concentrate, low metal recovery rate and high grade of tailings. In view of the low ore grade of the ore, the researchers first pre-screened the ore and separated the fine-grained ore that was easily muddy in advance. At the same time, the re-election and sorting process was increased, the re-election and flotation ratios were adjusted, and the new collectors were developed simultaneously with the nature of the ore. High-lime low-grade refractory hematite utilization technology has achieved remarkable economic, social and environmental benefits through practical application. Through the use of this technology, Sijiaying Iron Mine's 6.3 million tons of high-sludge low-grade hard-to-select hematite can be comprehensively recycled. While it is difficult to select hematite by recycling high-sludge low-grade grades and create considerable economic benefits, the Sijiaying iron ore mine site has also achieved more scientific planning, and the open-pit mining environment has been greatly improved. More importantly, the high-sludge low-grade and difficult-to-select hematite utilization technology provides a feasible solution for the treatment of other types of low-grade refractory hematite ore and rock and rock junctions in the Sijiaying mining area. Impact Crusher Parts,Impact High Chrome Part,Impact Crusher Blow Bar,Crusher Part Impact Bar ZHEJIANG FULE MINING MACHINERY CO., LTD , https://www.flmachine.com
Difficult to choose hematite utilization in Sijiaying Iron Mine, Hebei Province
Hebei Steel Group iron ore mining company Sijiaying high mud refractory low-grade hematite study the use of technology to fill the gap. The application of this technology has successfully recycled and utilized the 6.3 million tons of high-mud, low-grade and difficult-to-select hematite that has been gradually stored since the Sijiaying Iron Mine was completed and put into production. The accumulated economic benefits have been 289 million yuan, and the Sijiaying Mining Area has been revitalized. Other types of low-grade refractory hematite and ore and rock junctions are difficult to select low-grade ore resources of about 45 million tons, and long-term benefits are huge.