Crust breaker and ore dispenser

C - Chemistry – Metallurgy – 25 – C

Patent

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Details

C25C 3/14 (2006.01)

Patent

CA 2724701

A crust breaker and ore feeder device for electrolytic alu-minum smelting employs an in-line three-position pneumatic cylinder (136) capable of moving the plunger shaft (120) and chisel (122) to a fully raised position, to a fully lowered position, and to an intermediate, partly lowered position. The full stroke is used for a conventional combined ore dispensing and a crust breaking operation; a partial stroke between the ful-ly raised position and the intermediate position permits ore dispensing from an ore dispensing cup (124) without a crust breaking; and a partial stroke between the intermediate position and the fully lowered position permits crust breaking operation without ore feeding. The cylinder can take form of a tandem cylinder having axially aligned upper portion (150) and lower cylinder portion (160), with rods (154, 164) not connected to one another.

Le dispositif brise-croûte et distributeur de minerai pour la production électrolytique de laluminium utilise un vérin pneumatique en ligne à trois positions (136) apte à déplacer larbre plongeur (120) et le trépan (122) vers une position entièrement relevée, vers une position entièrement abaissée et vers une position intermédiaire, partiellement abaissée. La course complète est utilisée pour une opération classique combinée de distribution de minerai et de brisage de croûte; une course partielle entre la position entièrement relevée et la position intermédiaire permet la distribution de minerai à partir dun godet de distribution de minerai (124) sans brisage de croûte; et une course partielle entre la position intermédiaire et la position entièrement abaissée permet deffectuer lopération de brisage de croûte sans distribution de minerai. Le vérin peut prendre la forme dun vérin tandem ayant une partie supérieure axialement alignée (150) et une partie de vérin inférieure (160), avec des tiges (154, 164) non reliées les unes aux autres.

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