Beneficiation of High Alumina Iron-ore Slimes This template can be used as a starter file to give updates for project milestones. Sections Right-click on a slide to add sections. Sections can help to organize your slides or facilitate collaboration between multiple authors. Notes Use the Notes section for delivery notes or to provide additional details for the audience. View these notes in Presentation View during your presentation. Keep in mind the font size (important for accessibility, visibility, videotaping, and online production) Coordinated colors Pay particular attention to the graphs, charts, and text boxes. Consider that attendees will print in black and white or grayscale. Run a test print to make sure your colors work when printed in pure black and white and grayscale. Graphics, tables, and graphs Keep it simple: If possible, use consistent, non-distracting styles and colors. Label all graphs and tables. Manish Kumar Jha Chemical Engineering IIT Kanpur Guided by: John Samuel Thella Raw Material Group, R & D 01/12

Objective Iron Ore (ROM) -40+10 mm 1.9 % Al2O3 -10+0.15 mm 2.7 % Al2O3 Blast furnace -40+10 mm 1.9 % Al2O3 Sinter Plant -10+0.15 mm 2.7 % Al2O3 Tailing pond -0.15 mm ~10 % Al2O3 Iron Ore (ROM) Pellet Feed Fines VAP 02/12

Less Energy in Regrinding Motivation 1 Higher Mine Output 2 Less Energy in Regrinding 3 Ecological Benefits This way we can be winners twice over. 03/12

Feed Analysis Size-wise Distribution Particle Size (µm) 04/12

Modus Operandi Overflow High Alumina Slimes Tailings Concentrate Underflow 05/12

Hydrocyclone Separator Overflow Overflow Iron Slimes Underflow Centrifugal Viscous Feed Underflow 06/12

15 experiments conducted, using 3 factor – 3 level Box-Behnken DOE. Parameters involved: 15 experiments conducted, using 3 factor – 3 level Box-Behnken DOE. Pressure ( kg/cm2) Percent solid (%) Spigot diameter (mm) 1.4 10 3.2 2.1 15 4.5 2.5 20 6.4 Fe(t)% SiO2% Al2O3% Wt % Best results: 62.63 1.83 2.68 54.9 62.79 1.88 2.73 60.3 61.47 1.89 2.78 59.4 07/12

Result Analysis Alumina Rejection: Surface plot Alumina Rejection: Pareto Chart 08/12

Froth Flotation (Tailings) Fe Al2O3 Concentrate 09/12

Depressant dose (g/Kg) Parameters involved pH Collector dose (g/Kg) Depressant dose (g/Kg) 8 0.5 0.25 9 1 10 1.5 Fe(t)% SiO2% Al2O3% Wt % Best results known yet: 64.64 1.56 2.58 64.4 62.69 1.47 3.64 -- 59.16 1.76 3.74 49.7 10/12

Conclusions Best result that we got till now is, alumina reduction from: 6.12 to 2.68 percent (Hydro-cyclone). 4.31 to 2.58 percent (Froth Flotation). It is expected to get alumina concentration below 2 percent if we use the best setup together. 11/12

Thank You 12/12