Conveyors: fluid current – Pulsing fluid current
Patent
1993-12-28
1995-12-12
Avila, Stephen
Conveyors: fluid current
Pulsing fluid current
406 89, B65G 5318
Patent
active
054744016
ABSTRACT:
A pneumatic metering device for metering powdered materials, for example in connection with feeding aluminum oxide and aluminum fluoride to an electrolysis cell for production of aluminum, includes a container in the form of a relatively long, closed channel or similar structure. A fluidizing element is fitted in the base of the channel for supply of air for fluidization of material which is located in the channel. The container is fitted with an inlet for feeding material to the container from a store in the form of a silo or similar and an outlet for metered discharge of material from the container. The area below the inlet is inactive and is not supplied with fluidizing air, whereas air is supplied intermittently to the fluidizing element which is designed to cover essentially all other parts of the base of the channel.
REFERENCES:
patent: 2740671 (1956-04-01), Sayre
patent: 4220426 (1980-09-01), Ply
patent: 5360297 (1994-11-01), Enstad et al.
Enstad Gisle G.
Nagell Bernt
Ognedal Leiv
Paulsen Knut A.
Vikshaland Bjorn
Avila Stephen
Norsk Hydro a.s.
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