flop gate

[′fläp ‚gāt]

(mining engineering)

An automatic gate used in placer mining when there is a shortage of water; the gate closes a reservoir until it is filled with water, then automatically opens and allows the water to flow into the sluices; when the reservoir is empty, the gate closes, and the operation is repeated.

References in periodicals archive

The machine includes a 24-in.-wide grizzly bypass conveyor with an adjustable flop gate, as well as a 40-in.

IROCK Crushers introduces wheeled jaw crusher

A new bypass chute design incorporates a "flop gate" to allow the operator to switch between using the optional side conveyor or sending material to the main belt.

Powerscreen Maxtrak easily configured for any application

A flop gate within the pant leg chute gives operators the option to either recirculate oversized material for further screening and crushing or divert it to be stockpiled as a 100percent crushed material.

IROCK's Sidewinder secondary crusher reduces wear, boosts production

Halfway through the shift, with a three-minute flop gate change, the plant can then begin to make three completely different products--including the 3/8-in.

The flop gates in all chutework and the bins on top of the crushers and the screens also aid in making these changes quickly.

But where the 3-in.-plus material from these screens had previously fed both tertiary cones, flop gates can now send all 3-in.plus material to feed one cone crusher, which still has a shorthead coarse liner, and 1- x 3-in.

Flexible on the fly

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