Intermediate layer for seating RHM tubes in cathode blocks

Details Intermediate layer for seating RHM tubes in cathode blocks Intermediate layer for seating RHM tubes in cathode blocks

1980-09-22

1982-07-13

Edmundson, F.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204 67, 204280, 204294, C25C 700, C25C 306, C25C 702

Patent

active

043393160

ABSTRACT:
A cathode for an electrolytic cell operated at elevated temperature, the cathode comprising a refractory hard metal (RHM) body embedded in a carbonaceous base. The cathode is provided with an intermediate layer of fibrous material between a side wall of a seat in the base and a wall segment of the RHM body. The layer preferably comprises low-density carbon felt, and the layer prevents breakage of the RHM body by providing a cushion against differential thermal expansion and contraction of the base and body, especially during cell start-up.

REFERENCES:
patent: 4071420 (1978-01-01), Foster et al.
patent: 4181583 (1980-01-01), Steiger et al.
patent: 4247381 (1981-01-01), Schirnig et al.
patent: 4265717 (1981-05-01), Wiltzius
patent: 4290874 (1981-09-01), McMonigle et al.
Wiltzius, U.S. Ser. No. 92,441, filed Nov. 8, 1979.
McMonigle et al., U.S Ser. No. 162,754, filed Jun. 25, 1980.

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