Polyurethane mine screen is one of the company's main sales products. The quality of the production meets the national inspection standards. Let's look at the relevant knowledge of mine screens. There is a shortage of mine screen resources in our country. Most of the mine screens have extremely fine embedded particle size, which is difficult to beneficiate. The existing grinding and beneficiation technology and equipment have small production capacity, high energy consumption and steel consumption of the screen, and low beneficiation efficiency. There is an urgent need for advanced technology and equipment to transform the screen technology to promote the efficient development and utilization of lean iron ore resources. The mine screen adopts the principle of medium-speed and medium-pressure screen and continuous and repeated pulsating vertical material layer rolling and crushing. Several rollers quickly roll and repeatedly knead the metal ore in the cone of the cone screen. The dissociation interface of useful minerals and gangue is sufficiently dissociated in the case of coarse grains, so as to obtain an ideal sorting effect. The single-machine steel wire screen can process various ores with a capacity of 40~2000t/h. The column mill superfine crushing and coarse particle tailing preselection process jointly developed by the research screen. And coarse-grained tailings, improve the grade of the coarse concentrate into the grinding, reduce the quantity of the coarse concentrate into the grinding, thereby greatly increasing the production capacity of the system's grinding and beneficiation, reducing energy consumption and steel consumption, and significantly improving the grade and resources of the concentrate screen plant Recovery rate, especially for the development of lean iron ore screen resources is extremely important.