Discharge-controlled method for a compressed air-controlled wet

Details Discharge-controlled method for a compressed air-controlled wet Discharge-controlled method for a compressed air-controlled wet

1980-03-03

1981-05-05

Miles, Tim R.

Classifying, separating, and assorting solids

Stratifiers

With liquid treatment

209491, 209496, 340529, B03B 522

Patent

active

042657440

ABSTRACT:
A discharge-controlled method for a compressed air-controlled wet settling machine for the preparation of mineral mixtures, particularly for the washing of raw coal, is carried out such that the preparation takes place by means of pulsation of a separating liquid in a work chamber, whereby the pulsation is controlled by means of inlet and outlet valves and results in a stratification of the minerals on the settling machine carrier such that the heavier materials are stratified below the lighter materials. The layer level of the heavier material is measured by a scanner, in particular a float, and an actual-reference regulation controls a discharge apparatus for the heavier minerals. Measurement of the actual value of the heavier material layer level takes place by way of the scanner during a period of time which lies asymmetrically between the opening time of the outlet valve and the opening time of the inlet valve, and in particular shortly before the opening time of the inlet valve. The method further includes determining whether the layer level has increased or decreased beyond specific limits and provides optical and/or acoustic signals when such limits are exceeded.

REFERENCES:
patent: 2106756 (1938-02-01), Obermaier
patent: 4019981 (1977-04-01), Stern et al.
BATAC-jigs, Nov. 1974.
Digital Circuit Arrangements, MOS, Data Book 1974/75, vol. 1, Siemens AG.
WEDAG, Elecktronisch Gesteuerte Setzmaschinenventile, Apr. 1969.

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