The Research Of Silicon Cutting Sand Green Renewable Process Equipment

Under the control of the influence of acid and alkali, conventional silicon cutting waste recycling methods of slurry cause serious pollution to the environment. This paper put forward the physical separation method of hydrocyclone on the basis of the original process and developed a silicon cutting sand green renewable process equipment. The main results are as follows:1) Develop one6microns classifying hydrocyclone. First of all, according to the theory of hydrocyclone separation, we determine the basic structure of the6microns classification hydrocyclone. Then using Fluent software for simulation analysis and optimization of structure parameters. And I make sure that the volume concentration of slurry material is2%-3%and the hydrocyclone inlet pressure is0.35MPa.2) Building an experiment platform on the basis of a single hudrocyclone to study the hydrocyclone inlet pressure, concentration of material, split ratio and other factors which can influence hydrocyclone working. We have a result that the best inlet pressure is0.35MPa, volume concentration of slurry material is2%～3%and split ratio is1/2.1. The hydrocyclone separation efficiency rised first and then decreased with the increases of inlet pressure or split ratio and decreased with the increases of volume concentration.3) Industrial operation success. We manufacture a silicon cutting sand green renewable process equipment which production capacity is one ton of sand cake per hour. We achieve the goal of water circulation and obtain silicon carbide product which purity is97%, the particle concentration at6～11μm range is78%and the equipment has entered a stage of stable industrialized production at present.