Control systems for material treatment plant

Details Control systems for material treatment plant Control systems for material treatment plant

1981-06-15

1983-10-11

Hill, Ralph J.

Classifying, separating, and assorting solids

Treatment subsequent

209 17, 209236, 209350, 366131, 366152, B03B 700, G05D 1102

Patent

active

044090960

ABSTRACT:
A control system of particulate material treatment plant comprising screening means which produces undersize and oversize fractions and which is controllable to vary one size fraction relatively to the other size fraction, preparation or dense medium washer means producing a relatively low ash oversize fraction and a relatively high ash oversize fraction and two storage bunkers for the undersize fraction and for the relatively low ash oversize fraction, respectively, the control system comprising sensor means for sensing the amounts of particulate material in each of the two storage bunkers and for deriving signals indicative of the sensed amounts, control means receive the derived signals and control the operation of the screening means in accordance with the received signals.

REFERENCES:
patent: 2888026 (1959-05-01), Henderson et al.
patent: 2973861 (1961-03-01), Jager
patent: 3494217 (1970-02-01), Tanaka et al.
patent: 4220526 (1980-09-01), Armstrong et al.
"Method for Controlling Coffee Density" in Research Disclosure, No. 201, pp. 3-4, Jan. 1981.

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