Abstract:
A gas flotation tank is provided that includes a series of adjacent chambers which impart a rotational current therein. Each chamber is separated from a skim oil trough by a skimming weir. Each chamber comprises an alternating fluid communication device between adjacent chambers allowing fluid communication between adjacent chambers in the form of a communication port in the dividing wall between adjacent chambers and a chamber outlet in conjunction with a perforated plate and the outlet is positioned in fluid communication with the final chamber.
Abstract:
Methods of providing data on the movement of froth in a froth flotation plant and on the height of the froth in the plant are disclosed. The surface of the froth is generally illuminated at the predetermined wavelength and a laser of the same wavelength is used to produce a light post on the froth's surface. An electronic camera is used to produce digital images of the surface and these are processed to provide the requisite information.
Abstract:
A method and an apparatus for the separation of the mineral components of a pyrite containing copper- molybdenum ore by flotation. The method comprises grinding the ore in the presence of soda ash in an open circuit to produce an aqueous ore slurry; subjecting the slurry to a collective flash flotation step (10) in the presence of soda ash and sodium sulphide to recover a first part of metal sulphides of the ore in the form of a first concentrate (Cl); subjecting the tailings (Tl) of the collective flash flotation step (10) to a grinding step (13) and to a collective rougher flotation step (14) to recover a second part of metal sulphides of the ore in the form of a second concentrate (C3); and subjecting the concentrate (Cl) of the collective flash flotation step (10) and the concentrate (C3) of the collective rougher flotation step (14) to a selection step (12) to separate molybdenite from the other metal sulphides of the concentrate.
Abstract:
Method and apparatus for controlling the flotation process of sulphide ores including separation of sulphide minerals from pyrite in an alkaline environment created by lime. The method comprises measuring the molybdenum electrode potential of an aqueous slurry of the ore and adjusting the addition of lime based on the measured molybdenum electrode potential to maintain the molybdenum electrode potential of the slurry in a preselected range. The apparatus comprises means (6) for measuring the molybdenum electrode potential and a control unit (7) for controlling the addition of lime to the slurry based on the measured molybdenum electrode potential of the slurry.
Abstract:
Die Erfindung betrifft ein Verfahren zur Entfernung von Feststoffen mittels Gasblasen aus einer wässrigen Faserstoffsuspension (1) in einer, mehrere Flotationszellen (2) umfassenden Flotationsanlage, in denen durch Zuführung eines Faserstoffsuspension-Gas-Gemisches (3) Flotationsschaum (4) gebildet wird, welcher Feststoffe sammelt und aus den Flotationszellen (2) über einen Überlauf (5) in wenigstens eine Schaumsammeirinne (6) geführt und dort aufgestaut wird, wobei die von den Feststoffen befreite Faserstoffsuspension als Gutstoff (7) aus der jeweiligen Flotationszelle (2) abgeleitet wird und die Menge des aus der Schaumsammeirinne (6) abfließenden Flotationsschaumes (4) über eine Steuerung (8) in Abhängigkeit von wenigstens einem Parameter des Gutstoffs (7) veränderbar ist. Dabei soll eine effiziente Flotation bei möglichst hoher Ausbeute und hoher Qualität des Gutstoffs (7) dadurch erreicht werden, dass zumindest bei einer Flotationszelle (2) die Menge des zugeführten Faser- stoffsuspensions-Gas-Gemisches (3) von der Steuerung (8) so verändert wird, dass die Höhe des Suspensionspegels in dieser Flotationszelle (2) konstant bleibt. Um die Schnelligkeit und Genauigkeit zu ver¬ bessern werden, wenn zumindest bei einer Flotationszelle (2) unmittelbar nach einer Veränderung der Menge des aus der Schaumsammeirinne (6) abgeführten Flotationsschaumes (4) die Menge des zugeführten Faserstoffsuspensions-Gas-Gemisches von der Steuerung (8) verändert.
Abstract:
The present invention relates to a system for treating sewerage overflow, and more particularly, to a system for treating sewerage overflow, which goes beyond an existing method of treating combined sewerage overflow (CSO) only to a specific capacity and releasing same, regardless of water quality, without notice when a flow volume exceeds the specific capacity, and measures the water quality of the sewerage overflow by using the apparatus for automatically measuring water quality, so as to release over-capacity overflow when the water quality is fair, but treating the overflow by using a surfactant micro bubble floatation device comprising a surfactant micro bubble floatation treating tub when the water quality of the overflow does not meet a standard, thereby increasing efficiency in treating a non-point pollution source and significantly improving management efficiency as well. The system for treating the sewerage overflow, according to the present invention, comprises: the apparatus for automatically measuring the water quality of the sewerage overflow; the surfactant micro bubble floatation treatment device comprising the surfactant micro bubble floatation treatment tub for treating the sewerage overflow; and the controller for releasing the overflow when a measurement value of the apparatus for automatically measuring water quality satisfies a base value, and transferring the overflow to the surfactant micro bubble floatation treatment device when the measurement value does not satisfy the standard value.
Abstract:
The present invention relates to a system for treating sewerage overflow, and more particularly, to a system for treating sewerage overflow, which goes beyond an existing method of treating combined sewerage overflow (CSO) only to a specific capacity and releasing same, regardless of water quality, without notice when a flow volume exceeds the specific capacity, and measures the water quality of the sewerage overflow by using the apparatus for automatically measuring water quality, so as to release over-capacity overflow when the water quality is fair, but treating the overflow by using a dissolved air floatation device comprising a dissolved air floatation treating tub when the water quality of the overflow does not meet a standard, thereby increasing efficiency in treating a non-point pollution source and significantly improving management efficiency as well. The system for treating the sewerage overflow, according to the present invention, comprises: the apparatus for automatically measuring the water quality of the sewerage overflow; the dissolved air floatation treatment device comprising the dissolved air floatation treatment tub for treating the sewerage overflow; and the controller for releasing the overflow when a measurement value of the apparatus for automatically measuring water quality satisfies a base value, and transferring the overflow to the dissolved air floatation treatment device when the measurement value does not satisfy the standard value.
Abstract:
This invention is related to a methodology to determine flotation performance of sulphide ores. The objective of this invention is to develop a quantitative measure of surface oxidation to estimate flotation behavior of sulphide ores. 10 grams of ore samples are treated with hydrogen peroxide solutions to change their degree of surface oxidation (Figure 1). The same procedure is applied using 1 kg ore for batch flotations. For each conditions EDTA tests and batch flotation test are performed. The relationship between surface oxidation and cumulative copper recovery (%) for Cayeli Cu-Zn sulphide ore is given in Figure 3. For each test ultimate recovery and flotation rate constants are calculated.
Abstract:
A method of controlling operation of a froth flotation cell comprises introducing gas into a liquid in the cell, thereby to create a froth on the surface of the liquid, which froth overflows and leaves the cell at an overflow point, wherein the froth has a froth height from the level of the overflow point to the upper surface of the froth, measuring values of the froth height for two values of gas flow rate into the cell, measuring values the velocity at which the froth overflows at the overflow point for two values of gas flow rate into the cell, calculating a gas flow rate into the cell that optimises gas recovery, by treating the measured values of froth height and measured values of froth velocity independently, and setting the gas flow rate into the cell to be the calculated flow rate into the cell that optimises gas recovery.
Abstract:
Die Erfindung betrifft eine Flotationsvorrichtung (1) und deren Verwendung, umfassend ein Gehäuse (2) mit einer Flotationskammer (2a) zur Aufnahme einer Suspension und mindestens einem Einlass für die Suspension (5a), sowie mindestens eine Schaumsammeieinrichtung (3) zur Aufnahme und Abführung eines Schaumprodukts (SP), welche an einer Oberseite des Gehäuses (2) angeordnet ist, wobei weiterhin mindestens ein Fluidverteilerelement (4) zur Erzeugung einer in Richtung der mindestens einen Schaumsammeieinrichtung (3) gerichteten Strömung oberhalb des mindestens einen Einlasses in der Flotationskammer vorhanden ist, dessen vertikale Position (4a) oberhalb des Einlasses (5a) in der Flotationskammer (2) veränderbar ist.