OCR Text |
Show TABLE 6-( Continued) WATER AND POWER REQUIREMENTS-( Continued) FOR THE PRODUCTION OF CERTAIN IMPORTANT INDUSTRIAL MATERIALS ( For the production of 50 tons per day, except when otherwise noted) > O 73 > Product Water Requirements Raw Materials or Process Gallons per Day Principal Use of Water Power Requirements Kwh per Day 25. Iron, smelting From iron ore, limestone, coke; electrothermic.. From iron scrap, ingot; electrothermic Electrolytic 100,000- 125,000 26. Iron, smelting 7,000- 22,500 27. Lead, refining 50,000- 100,000 28. Lactose From milk whey 10,000,000 Process 17,000 29. Magnesium From magnesium chloride, electrolytic From dolomite, coke 800,000- 1,300,000 30. Magnesium carbonate 20,000 Process 15,000 31. Phosphorus... From phosphate rock, coke, silica; electrothermic 600,000- 700,000 32. Phosphoric acid From phosphorus, or phosphate rock and sulphuric acid From sylvinite 375,000- 3,750,000 2,000,000- 2,500,000 3,000,000 Process, cooling Process Process 33. Potash 173,000 2,500 34. Pulp ( bleaching) From pulp, chlorine and caustic soda From quartz crystals; electrothermic *> 35. Quartz, fused ( 5- 8 per lb.) 200,000- 300,000 •-. 36. Rayon, viscose From wood pulp, caustic soda, sulphuric acid.. From cotton linters, ammonia, copper sulphate, sulphuric acid, caustic soda 9,000,000- 10,000,000 4,500,000- 8,000,000 200,000 31,500,000 Process Process Cooling Process Rayon, cuprammonium 140,000 37. Rock wool From wool rock, coke From Butadiene, styrene, soap, salt From silica sand and carbon; electrothermic From salt or brine, limestone 2,000 38. Rubber ( Buna S).... 39. Silicon carbide 400,000- 450,000 40. Soda ash 750,000- 900,000 Cooling 41. Sodium. From salt, electrolytic ( 7 per lb.) ( 60,000 per 10 ton) 750 42. Sodium chlorate.. From salt, electrolytic 43. Sulphuric acid From sulphur » .... 125,000- 200,000 1,800,000 Process Process 44. Sulphur dioxide, liquid From sulphur 200 45. Steel, electric furnace From pig iron; electrothermic 25,000- 38,000 46. Steel, melting From steel scrap, ingots; electrothermic 10,000 47. Zinc From zinc ores; electrolytic 110,000- 190,000 Adapted from: Chemists and Metallurgists' Chemical Engineering Flow Sheets, fourth Edition, 1947; Shreve " Chemical Process Industries," 1945. NOTE: ( a) Blank space indicates unavailable but generally minor consumption. ( b) Although cooling water may be recirculated, in many instances the losses are considerable. Process water is to be considered as fully consumed, or at least unfit for further consumption. |