Burning hazardous waste in cement kilns

Conference · Wed Jun 01 04:00:00 EDT 1983 · Proc., Annu. Meet., Air Pollut. Control Assoc.; (United States)

OSTI ID:6947902

Chadbourne, J F; Helmsteller, A J

The cement manufacturing process is one of the oldest in the world, having been in practice for over 2000 years. It is also one of the most energy intensive, with up to 65 percent of the cost of the product attributable to energy consumption. In addition to high energy demand, the process conditions include extremely high temperatures. Cement clinker forms when the correct mixture of raw materials is heated to 2650/sup 0/ F. This requires combustion temperatures exceeding 3000/sup 0/ F. under oxidizing conditions. To accomplish this, gas temperatures above 2000/sup 0/ F. occur for several seconds (typically five seconds), which is much longer than residence times in permitted hazardous waste incinerators. These conditions are extremely favorable to the destruction of organic compounds and have led to extensive investigation into the potential for burning hazardous waste in cement kilns. Cement kilns consuming hazardous wastes have been tested for air emissions under various operating conditions. The substantial body of information on the emissions and handling of hazardous wastes from these studies has demonstrated that effective destruction of wastes can be accomplished with the added benefits of energy conservation and no significant change in air emissions.

• Research Organization: General Portland, Inc. Dallas, Texas
• OSTI ID: 6947902
• Report Number(s): CONF-830617-
• Conference Information: Journal Name: Proc., Annu. Meet., Air Pollut. Control Assoc.; (United States) Journal Volume: 80-50.4
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420900 -- Engineering-- Waste Processing Plants & Equipment-- (-1989)
421000* -- Engineering-- Combustion Systems
CEMENT INDUSTRY
CHEMICAL REACTIONS
COMBUSTION
EMISSION
ENERGY CONSERVATION
ENERGY CONSUMPTION
HAZARDOUS MATERIALS
INDUSTRY
KILNS
MANAGEMENT
MATERIALS
ORGANIC COMPOUNDS
OXIDATION
TESTING
THERMOCHEMICAL PROCESSES
VERY HIGH TEMPERATURE
WASTE DISPOSAL
WASTE MANAGEMENT