Plastic article or earthenware shaping or treating: apparatus – Press forming means – press reshaping means – or vulcanizing... – Roll mounted within cooperating drum
Patent
1981-12-14
1983-10-25
Cockeram, H. S.
Plastic article or earthenware shaping or treating: apparatus
Press forming means, press reshaping means, or vulcanizing...
Roll mounted within cooperating drum
425222, 425331, 425DIG101, 425DIG230, A01J 2100, B29F 500, A23G 120, B29D 700
Patent
active
044116128
ABSTRACT:
Apparatus for extracting precious metals from their ores in which the ore is particulated and mixed with a binding agent to form a paste. The paste material is discharged into a rotary drum at an extruding station where it is pelletized by forcing it through a perforated sidewall of the drum. The pellets are discharged onto a conveyor belt and are transported to a spray station where they are wetted with a lixiviant solution. The lixiviant coated pellets are then dried by exposure to a heated air stream at a drying station as they are transported to an open air curing stockpile. The cured pellets are heaped in a pile and are then washed with a water spray to yield a pregnant solution of a precious metal salt.
REFERENCES:
patent: 588476 (1897-08-01), Rhodes
patent: 2009667 (1935-07-01), Keyes
patent: 2164164 (1939-06-01), Price
patent: 2252900 (1941-08-01), Shofer
patent: 2252900 (1941-08-01), Shafer
patent: 2764951 (1956-10-01), Fisher
patent: 2771347 (1956-11-01), Beck et al.
patent: 4022563 (1977-05-01), Spencer
patent: 4029459 (1977-06-01), Schmiedeke
patent: 4256706 (1981-03-01), Heinen
Cockeram H. S.
Griggs Dennis T.
Neha International
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