Gold Centrifugal Concentrator Ganzhou Gelin Mining. Knelson Centrifugal Concentrator Stlb 20 Stlb20 Concentrator, Stlb 30 Stlb30, Stlb 60 Stlb60, Stlb 80 Stlb80, Stlb 100 Stlb100, Stlb120 Model FOB Price: US 4,7004,800 / Piece Min. Order: 1 Piece. get price.