PRESENT POSITION OF PROCESS ENGINEERING IN CEMENT MANUFACTURE

THE PRESENT POSITION OF CEMENT MANUFACTURING PROCESSES IN THE FEDERAL REPUBLIC OF GERMANY IS REVIEWED WITH REFERENCE TO FUEL CONSUMPTION, ELECTRIC POWER CONSUMPTION AND LABOUR COSTS. THE WET PROCESS WITH ITS HIGH FUEL CONSUMPTION IS BEING INCREASINGLY SUPERSEDED. BY USING COMBINED DRYING AND PULVERISING MILLS IT IS POSSIBLE, IN CONJUNCTION WITH KILN WASTE HEAT UTILISATION, TO PROCESS EVEN VERY MOIST RAW MATERIALS WITH A HEAT CONSUMPTION OF AROUND 80 KCAL PER KG OF CLINKER. WITH INCREASING SIZE OF THE PROCESSING UNITS UP TO CAPACITIES OF ABOUT 1 MILLION TONS PER YEAR THE SPECIFIC FUEL AND POWER CONSUMPTION DECREASE WITHIN CERTAIN LIMITS, THE LABOUR REQUIREMENT DECREASES TO 0.5 MAN-HOUR PER TON (MORE PARTICULARLY WITH ADVANCED AUTOMATION), AND THE COST PRICE CAN BE REDUCED BY UP TO 25% AS A RESULT OF LOWER CAPITAL EXPENDITURE. IN THE GERMAN CEMENT INDUSTRY, TOO, THERE HAS, OVER THE PAST TWELVE YEARS, BEEN A CHANGE-OVER TO LARGER PROCESSING UNITS. AS A RESULT, THE NUMBER OF KILNS HAS GONE DOWN BY 35%, WHEREAS OUTPUT HAS INCREASED BY MORE THAN 100%. IN OTHER COUNTRIES THE TREND TOWARDS FEWER UNITS OF RELATIVELY HIGH CAPACITY IS EVEN MUCH MORE PRONOUNCED. /AUTHOR/

• Supplemental Notes:
  • Vol 57, No 2, PP 49-55
• Authors:
  • Bellwinkel, A
• Publication Date: 1968-2

Media Info

• Serial:
  • Zement-Kalk-Gips

Subject/Index Terms

• TRT Terms: Cement; Cement kilns; Comminution; Costs; Drying; Electric power; Fuel consumption; Manufacturing; Ovens; Personnel; Reviews; Size
• Subject Areas: Energy; Finance; Highways; Materials; Society;

Filing Info

• Accession Number: 00212625
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 22 1994 12:00AM