China's phosphorus ore beneficiation methods put into operation since 1958, China's large phosphate rock flotation plant, Block 1, 1.2 million t / a of - after Jinping phosphate concentration plant in Jiangsu, Hebei in 1976, and built a horse camp phosphate The 300,000 t/a medium-sized magmatic rock-type phosphate ore flotation plant, the completion of these two phosphate rock flotation plants marks that China has mastered the mineral processing technology of the easy-selected phosphate rock. In the early 1970s, the direct flotation process of siliceous calcium deposits (glyphosite) with S808 as an inhibitor was developed, which made China a major breakthrough in the selection of refractory colloidal phosphate ore. In the late 1980s, China made a major breakthrough in the beneficiation technology of difficult-to-select colloidal phosphate ore. It has successively developed technologies such as direct flotation, reverse-positive flotation, scrubbing and heavy media sorting, and successfully applied to industrial production. Because the phosphorus minerals and gangue minerals of phosphorus resources in China are symbiotic and closely embedded, the granularity is fine, and only the flotation method can obtain better sorting effect. Therefore, the flotation method is the most used beneficiation method for phosphate rock in China. The mining roadheader series products are suitable for non-explosive heading projects in the mining field. They are provided for customers who are not allowed to use explosive methods in coal mines and tunnel engineering. A series of products are widely used in coal mines, railway highway tunnels, water conservancy projects and other fields. The company's various types of roadheaders meet the customer's design of various sizes of roadways, tunnels, of shale, sandstone, mudstone, coal rock, coal and other rock tunnels and coal mine tunnels with a Platts hardness below 120Mpa. Roadheader Machine,Mining Roadheader,Coal Roadheader Mining,Coal Mine Roadheader NORTH HEAVY GRYPS EQUIPMENT AND ENGINEERING CO.,LTD , https://www.nhgtunnel.com
At present, the roadheader has become the core equipment of mining mechanization and plays an extremely important role in the coal mining process. NHG comprehensively carried out the research and development of advanced technology and equipment for roadheaders in combination with advantageous resources. At present, EBZ100, EBZ132, EBZ160, EBZ180, EBZ230, EBZ260, EBZ280, EBZ300, EBZ320 and other more than 20 types of machines have been developed, and roadheader products have formed a good brand reputation and influence in the international market. The application of these products not only meets the needs of customers, but also effectively improves the service life and production efficiency of the roadheader.