Process and device for separating impurities from a suspension by flotation
AssigneeAndritz Inc.
InventorsBernhard Scherzinger, Helmuth Gabl
Life of this patent
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Abstract
Apparatus and a process for separating impurities from a suspension in a flotation cell, including an aeration device for aerating a liquid with a gas until the liquid is saturated. An expansion device expands the liquid saturated with gas to form gas bubbles in the liquid. An addition device adds the liquid containing gas bubbles to the suspension in the flotation cell.
Claims14
A process for separating impurities from a suspension by flotation, the process comprising the steps of:
- aerating a liquid with a gas until the liquid is saturated with the gas;
- expanding the liquid saturated with gas to form gas bubbles;
- and
- adding the liquid containing gas bubbles to the suspension;
- wherein the liquid saturated with gas is expanded separately from and before the liquid containing the gas bubbles is added to the suspension.
An apparatus for separating impurities from a suspension in a flotation cell, the apparatus comprising:
- an aeration device adapted for aerating a liquid with a gas until the liquid is saturated;
- an expansion device adapted for expanding the liquid saturated with gas to form gas bubbles in the liquid;
- and
- an addition device adapted for adding the liquid containing gas bubbles to the suspension in the flotation cell;
- wherein the expansion device is separate from the addition device and separate from the flotation cell.
An apparatus for generating gas bubbles in a liquid saturated with gas, the apparatus comprising a nozzle having an adjustable cross-section and an adjustable cross-section area.
Dependencies are inferred from the claim text.