Utilizing the magnetic fraction of raw refuse with shredded automobile scrap in cupola gray iron
The Bureau of Mines is involved in research directed toward the utilization of municipal solid waste. One of the primary objectives is the recycling of the magnetic fraction of municipal solid waste (raw refuse). This is consistent with one of the Bureau's goals, which is to minimize the requirements for mineral commodities by maximizing metals recovery from secondary domestic resources. In this investigation, cupola trials were made using combinations of refuse scrap with shredded automobile scrap under basic and acid slag practices. Furnace operating information and the behavior of alloying and tramp elements were obtained. The research showed that it is possible to utilize up to 60% refuse scrap in the cupola under basic practice and 30% under acid practice. Aluminum in refuse scrap, present in bimetallic cans, increased the recoveries of silicon and manganese charged to the cupola. Increased use of refuse scrap provided iron of lower sulfur. The alumina resulting from oxidation increased the slag volume. The aluminum and tin contents of the iron increased with increasing levels of refuse scrap in the charge. Lead was not a problem with respect to contamination of the iron. In basic practice, operation of the cupola was satisfactory since all slags were adequately fluid. In acid practice, operation became troublesome above the 45% level. Under both practices, the cupola iron melting rate decreased. Particulates in scrubber water and stack condensate samples contained lead, zinc, and tin, and the dust load increased. The tensile and transverse strengths of the iron produced under both practices are reported.
- Research Organization:
- Bureau of Mines, Washington, DC (USA)
- OSTI ID:
- 5029170
- Report Number(s):
- BM-RI-8454
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
AUTOMOBILES
RECYCLING
IRON
MATERIALS RECOVERY
MUNICIPAL WASTES
SCRAP METALS
STEELS
MAGNETIC SEPARATORS
MELTING
PRODUCTION
SOLID WASTES
TENSILE PROPERTIES
ALLOYS
CONCENTRATORS
ELEMENTS
IRON ALLOYS
IRON BASE ALLOYS
MANAGEMENT
MECHANICAL PROPERTIES
METALS
PHASE TRANSFORMATIONS
PROCESSING
RECOVERY
SCRAP
TRANSITION ELEMENTS
VEHICLES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
320305* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management
320604 - Energy Conservation
Consumption
& Utilization- Municipalities & Community Systems- Municipal Waste Management- (1980-)
360101 - Metals & Alloys- Preparation & Fabrication