Q2 (50 marks) A plant is to produced 290,000 bbl/day of crude bitumen. On average, the ore contains 10% bitumen and 5% water by weight. The overall bitumen recovery is 90%. At the mining location, assume that the average depth of the overburden is 30 m and that of the ore, assuming absence of inter-burden, is 45 m (as shown in a in page 3). Let the bitumen density to be 1050 kg/m3, mineral solids 2650 kg/m and water 1000 kg/m. Assume that the overburden density is 2100 kg/m. One barrel equals 0.159 m. You are asked to calculate: 8) Assume that the overall extraction water requirement is equivalent to producing oil sands slurry with a density of 1375 kg/m3. What is the daily water requirement in barrels/day? Use mined ore as your basis. (5 marks) 9) What is the ratio of water usage per barrel of produced crude bitumen? (5 marks) 10) What would be the TV: BIP and stripping ratio, if the inter-burden is embedded with an average depth of 2 m in the oil sand ore (as shown in b in page 3)? Assuming that the density of inter- burden and overburden is the same as 2100 kg/m. (5 marks) (a) (b) Overburden 30 m Overburden 30 m Oil Sands Ore 45 m Oil Sands Ore 45 m Inter-burden Oil Sands Ore Q2 (50 marks) A plant is to produced 290,000 bbl/day of crude bitumen. On average, the ore contains 10% bitumen and 5% water by weight. The overall bitumen recovery is 90%. At the mining location, assume that the average depth of the overburden is 30 m and that of the ore, assuming absence of inter-burden, is 45 m (as shown in a in page 3). Let the bitumen density to be 1050 kg/m3, mineral solids 2650 kg/m and water 1000 kg/m. Assume that the overburden density is 2100 kg/m. One barrel equals 0.159 m. You are asked to calculate: 8) Assume that the overall extraction water requirement is equivalent to producing oil sands slurry with a density of 1375 kg/m3. What is the daily water requirement in barrels/day? Use mined ore as your basis. (5 marks) 9) What is the ratio of water usage per barrel of produced crude bitumen? (5 marks) 10) What would be the TV: BIP and stripping ratio, if the inter-burden is embedded with an average depth of 2 m in the oil sand ore (as shown in b in page 3)? Assuming that the density of inter- burden and overburden is the same as 2100 kg/m. (5 marks) (a) (b) Overburden 30 m Overburden 30 m Oil Sands Ore 45 m Oil Sands Ore 45 m Inter-burden Oil Sands Ore