Method and apparatus for forming and treating bundles of steel r

Details Method and apparatus for forming and treating bundles of steel r Method and apparatus for forming and treating bundles of steel r

1975-07-24

1977-03-08

Stallard, W.

Metal treatment

Compositions

Heat treating

148 15, 148153, 266107, 266120, C21D 164, C21D 958

Patent

active

040111105

ABSTRACT:
A hot steel rod which issues from the last pass of a rod mill is coiled at a level above a bath of molten salt and successive coils are caused to descend in the bath toward a platform on which they accumulate to form a bundle. The coils are out of contact with each other during the initial stage of movement toward the platform for a period of time which is long enough to insure that their material undergoes desirable structural changes. The temperature of the bath is maintained within a predetermined range by an adjustable induction heater which surrounds the vessel for the bath and by circulating a stream of molten salt through one or more heat exchangers located outside of the vessel. The stream is withdrawn close to the bottom zone and is returned into the upper zone of the bath. Alternatively, the vessel may contain a mammoth pump which is operated by water and steam. The steam withdraws a stream of molten salt from the vessel and is thereupon separated from withdrawn molten salt before the latter is returned into the bath. The separated steam is condensed and is used to rinse bundles (after the bundles are removed from the bath) prior to readmission into the mammoth pump. The bundles are thereupon caused to pass through a wire die.

REFERENCES:
patent: 1984744 (1934-12-01), Hood
patent: 2023736 (1935-12-01), Lloyd

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