MATERIAL BALANCE DATA SHEET

Unit operation: Mud settling & washing
Production capacity 1.0 x 10^6 t/yr Smelter grade alumina (SGA)
No. of settlers 6
Feed rate to settlers 2400 gpm
Settler feed solids concentration 200 g/l
Synthetic Flocculant dosage 0.88 kg per tonne of mud
Synthetic Flocculanf density 1.0 g/cc
1st Washer overflow rate 1400 gpm
1st Washer solids concentration 80.5 mg/L
Settler underflow solids 350.0 g/L

Complete a material balance to determine the total thickener overflow rate and solids concentration.