S.S Coal Washing Net is used to fix the multilayer filter net structure of net hole through high temperature diffusion sintering. Its filtering mechanism is mainly surface mesh hole and filter cake, and the filter layer formed by single-layer fine metal wire mesh is directly intercepted and filtered. The advantage is that the impurity particles with a certain size distribution are directly intercepted on the outer surface of the filter screen to form a layer of uniform filter cake, with the gradual formation of filter cake. It can also intercept smaller sizes of particles, the surface of the filter material is uniform and regular, the inner pore of the mesh is smooth, which is not only conducive to the rapid formation of the filter cake layer, but also facilitates the cleaning and separation of the filter slag. Therefore, the effect of high filtration precision, good reliability and stable process can be obtained, and it also has high pressure, low pressure drop, uniform formation of filter cake and suitable backwashing operation. It has excellent backwash and regeneration characteristics, can be used for a long time, especially for continuous operation and automation of the system, and is easy to form, process and weld. It is convenient to assemble, and can be made into various forms of filter elements.