The Optimization Of Dense Medium Suspension Properties From Thickening Cyclone

Dense medium separation technology has been a hot research in the field of mineral processing and the research of suspension characteristics is critical in this spot. As a new equipment of suspension characteristics’ s optimization, thickening cyclone has important research value and broad application prospects. In this paper, we study on characteristics of suspension disposed by ferrosilicon powder and A slime and the optimization regular of suspension characteristics by thickening cyclone. After studying the characteristics of high density A slurry suspension, we find that the medium solids have significant effect on the suspension characteristics density is from 1.7 g/cm3 to 2.5 g/cm3. When the mass content of-0.045 mm medium solids is from 60% to 75% and the slurry density is low, the greater of the mass density is, the faster of the settling velocity and the poorer stability are; but when the slurry density is higher than 1.7 g/cm3, the change settling velocity is not obvious. When configurating the low density slurry, The higher density of medium solids are, the smal er slurry viscosity and better liquidity are. Compositing the stability and viscosity of suspension, we choose siliconiron which with larger density as medium solids in the separation of A. At the same time, we find the following regular: As the increasing of A slime content or the density of the slurry, the stability of suspension become better and the slurry viscosity is increased.The main characteristics of suspension are density, stability, viscosity, solid content, magnetic material content, particle size and the solid volume concentration, etc. Research results show that the density of suspension can be significantly improved by thickening cyclone. The underflow density is reducing with the increase of nonmagnetic material content and underflow density is gradually increasing with the increase of feeding pressure and center pipe diameter. When the content of A slime is 10%, the pressure is 0.08 MPa and center pipe diameter is 47 mm, the increase of underflow density is 0.56g/cm3 and up to 2.31g/cm3.While the drop of overflow density is 0.48g/cm3. The stability of suspension can be improved by thickening cyclone. The underflow stability is gradually increasing with the increase of nonmagnetic material content and underflow density is gradually decreasing with the increase of feeding pressure and center pipe diameter. At the same time, the underflow viscosity is gradually increasing with the increase of nonmagnetic material content, feeding pressure and center pipe diameter. Both the nonmagnetic material content and overflow center pipe diameter have significant effects in the process of thickening cyclone concentration.In this paper, we concentrate the low density suspension to reach the required density and magnetic material contents by thickening cyclone in the tests of dense medium separation of A mineral slurry. Appropriate conditions are as follows. The nonmagnetic material content should be controlled in 5% to 10%, the feeding pressure should be controlled in 0.08 MPa to 0.10 MPa and the center pipe diameter should be 35 mm to 47 mm.In this paper, we provide theoretical basis for A mineral of the dense medium separation and get the experiment results. At the same time, we play a important role in the industrial application of thickening cyclone.