An investigation of wide-angle dense-medium cycloning for the recovery of metal and aggregate from fine slag.
An investigation was carried out to evaluate the feasibility of using wide-angle dense-medium cycloning to process a fine (-600 microm) stainless-steel slag. The slag was characterized by size and density using a combination of sieving and pycnometer measurements. Separation testing was carried out using a laboratory dense-medium cyclone to concentrate the stainless-steel fraction and produce a low-metal aggregate material. The effects of cyclone geometry (cone angle, underflow diameter, overflow diameter, cylinder length, and vortex finder length) and medium density on cyclone performance were evaluated. A Plackett-Burman statistical design was used to determine the significant variables as related to recovery and purity of the metal and aggregate products. Based on these results, full-factorial designs were performed at two different medium densities. Regression models relating the significant variables to product recovery and purity were developed for both the metal and aggregate fractions.
Wolfe
Eric R
ER
Energy and Geo-Environmental Engineering, The Pennsylvania State University, University Park, Pennsylvania, USA.
Klima
Mark S
MS
D005591:Chemical Fractionation; D003247:Conservation of Natural Resources / Q000379:methods; D005240:Feasibility Studies; D007220:Industrial Waste / Q000032:analysis*; D008670:Metals / Q000737:chemistry / Q000302:isolation & purification*; D015233:Models, Statistical; D010316:Particle Size; D012044:Regression Analysis; D013193:Stainless Steel / Q000737:chemistry / Q000302:isolation & purification
D007220:Industrial Waste; D008670:Metals; D013193:Stainless Steel