Method for preparing a steel charge from terneplate scrap metal

Details Method for preparing a steel charge from terneplate scrap metal Method for preparing a steel charge from terneplate scrap metal

1984-04-09

1985-10-15

Caroff, Marc L.

Cleaning and liquid contact with solids

Processes

Using solid work treating agents

51323, 134 12, 134 18, 134 251, 134 255, 134 29, 134 30, 134 40, B08B 704

Patent

active

045472270

ABSTRACT:
A process is disclosed for treating terneplate scrap contaminated with combustibles, such as found in automobile gas tanks, to reduce the alloy content of the scrap to a sufficient level to permit the scrap to be reprocessed in an electric furnace. In the process, the contaminated terneplate metal is introduced into the feed end of a degreaser maintained at about 200 degrees F. by live steam. The degreaser includes a cutting device for downsizing the metal scrap and a vaporized caustic spray, combining with the live steam, to emulsify the residual combustibles. The metal feed exits the degreaser and is dryed while the vaporized emulsion is advanced to a condensor and separator for recycling the caustic to the degreaser and the hydrocarbons to storage. After drying, the metal feed is introduced into a glass bead blaster which removes the lead and tin from the metal feed, thereby leaving a scrap metal feed with a lead and tin percent sufficiently low to be suitable for use as a charge in a steel making furnace.

REFERENCES:
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patent: 3734776 (1973-05-01), Keogh
patent: 3846173 (1974-11-01), Ihrig
patent: 4097306 (1978-06-01), Carman

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