Measuring and testing – Measuring vessel
Patent
1975-01-24
1976-08-17
Queisser, Richard C.
Measuring and testing
Measuring vessel
73DIG9, G01N 114
Patent
active
039746984
ABSTRACT:
A molten metal vacuum-type sampler for taking samples of molten metal from the mold used in an electroslag refining process while opposite voltages are applied across the electrode and the mold, the sampler being a box-shaped hollow body with a silica tube extending downwardly therefrom to be inserted through the slag cover into the molten metal for a few seconds to draw a metal sample into the hollow space of the sampler. The sampler has two insulation boards on opposite sides overlapping the sides to prevent an electrically conductive contact of the sampler with the nearby surfaces of the mold and the electrode. An insulated pipe attached to the top of the sampler forms a handle in its upper aspect and connects conduits and a valve optionally to an argon gas source or a vacuum reservoir. Argon is discharged into the supporting pipe, through the sampler and the silica tube when the tube is inserted in the slag and into the molten metal at which time the vacuum reservoir is placed in communication with the sampler vice the argon source for a predetermined short period (about 5 seconds) and metal is drawn through the silica tube into the sampler, the amount of metal being predetermined by the size of the vacuum reservoir and the degree of vacuum therein. The length of time to obtain the desired sample is governed by a restriction in the conduit to the vacuum reservoir. The interior of the sampler has its sides formed in a converging relationship to facilitate removal of the metal sample.
REFERENCES:
patent: 3255634 (1966-06-01), Cavalier
patent: 3309928 (1967-03-01), Cavalier
patent: 3490289 (1970-01-01), Mangin
Lukens Steel Company
Queisser Richard C.
Roskos Joseph W.
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