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  • Flotation Process Development and Assessment

    Based on these observations the rejection of galena from the copper flotation circuit is a viable option worth considering. This could be accomplished by employing a sequential flotation circuit where separate copper, lead and zinc rougher and final concentrates are produced. Another option would be to utilize a more regressive depressant scheme in the copper circuit to more efficiently direct ...

  • Reduction of Free Gold Losses in the Cleaner Circuit with ...

    cleaner flotation circuit gold losses during the processing of Kemess North ore. While the average pyrite to chalcopyrite ratio (Py:Cpy) of the Kemess North ore is expected to be considerably lower than the ore milled in the first quarter of 2005, it will nonetheless be considerably higher than that of the typical Kemess South ore. Copper and gold grades as well as pyrite and chalcopyrite ...

  • Flotation Circuit - an overview ScienceDirect Topics

    The second flotation circuit is a slightly different configuration of flotation equipment than that shown in Figure 2.2.8, but the general idea is the same. The only major difference is in the size of the equipment (smaller because less material is processed), the chemistry (to separate chalcopyrite from pentlandite), and fine grinding using a stirred mill. The copper-rich particles are ...

  • Flotation Circuit Automation

    Flotation circuit designs are also being influenced by operating philosophies possible with computer automation. It has been pointed out that flotation flowsheets tend to be simplified through use of online control. Logical control capability can reduce the necessity for recirculating streams, bringing circuits into open circuit mode with little or no metallurgical losses. Control techniques ...

  • Simulation and control of flotation circuits - PDF Free ...

    Frequency response characteristics of the flotation circuit for one particle type without (G, dp) and with (M) the feedback control according to Fig. 4. Open loop gain of the precess K=0.048. 2- and 4-section cells were determined earlier [1] and they could de described by one first order time lag with some time delay. In the following the delay as well as the time parameter of the froth layer ...

  • Flotation Process - an overview ScienceDirect Topics

    The residence time, pulp volume and flotation kinetics play a vital role in determining the selection of the number of cells required in a flotation circuit. To prevent loss of floatable coal along with tailings, it is advisable to put cells in series. Fig. 5.34 indicates the coal recovery through multiple cells (in series) in a

  • Flotation circuit efficiency improvement at Northern Star ...

    Nearly 40% of the flotation circuit losses are in the -38 µm size fraction. To improve the flotation circuit recovery, the fine particle gold recovery was targeted. A Cavitation Tube column was selected for the site-based pilot test work program. This paper presents data generated from the on-site test work, and the benefits of the Cavitation Tube column to improve fine particle flotation ...

  • Investigation of the reasons for copper and gold loss in ...

    However, when the proportion of skarn ore in the plant feed exceeds 20%, low flotation recovery is often observed. Approximately 20% of the copper and 30% gold losses occur through the rougher flotation circuit. However, losses via the cleaner tailing stream are 8% and 9% for copper and gold, respectively, and augment value mineral losses to the final tailing. It may be noted that the cleaner ...

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  • Flotation circuit efficiency improvement at Northern Star ...

    Nearly 40% of the flotation circuit losses are in the -38 µm size fraction. To improve the flotation circuit recovery, the fine particle gold recovery was targeted. A Cavitation Tube column was selected for the site-based pilot test work program. This paper presents data generated from the on-site test work, and the benefits of the Cavitation Tube column to improve fine particle flotation ...

  • Zinc sulphate addition point (Pb/Zn flotation) - Froth ...

    NaCN should be added in the grinding circuit (e.g. 20-30 g/t). In some cases, operations add Sodium Metabisulphite (e.g.100 g/t) to improve the depressing action on pyrite and sphalerite. The best way to evaluate the effect of depressors is to perform kinetic flotation tests. The rougher circuit is the key point to evaluate the reagents.

  • Flotation Cell Control - International Mining

    flotation circuit. Flotation cells have three main control parameters (1) reagent dosing rate (2) froth depth and (3) air addition rate. Many other parameters may vary such as feed rate, particle size distribution and head grade, however these are the output of upstream processes and are not controlled in the flotation circuit itself. Each of the flotation cell control parameters are discussed ...

  • Turn-key flotation retrofit with fast turnaround for ...

    In addition, the flotation circuit suffered from poor availability that was caused by heavy sanding of the other supplier´s flotation cells. Yamana was also looking for a partner to continuously improve their operations. These factors contributed to Yamana seeking ways to further improve its flotation circuit performance. In mid 2015 Daniel Diez, responsible of Yamana Gold business and ...

  • Investigation of the reasons for copper and gold loss in ...

    However, when the proportion of skarn ore in the plant feed exceeds 20%, low flotation recovery is often observed. Approximately 20% of the copper and 30% gold losses occur through the rougher flotation circuit. However, losses via the cleaner tailing stream are 8% and 9% for copper and gold, respectively, and augment value mineral losses to the final tailing. It may be noted that the cleaner ...

  • Flotation Cell - an overview ScienceDirect Topics

    Reintroducing material that has already been floated to the flotation circuit can result in a circulating load of very fine and highly floatable material. As a result, the capacity of the flotation equipment can be significantly reduced, which results in losses of valuable coal. Most installations will combat this by ensuring that the screen-bowl screen effluent is routed directly back to the ...

  • JKTech Specialist Consulting - JKTech JKTech

    In order to benchmark a flotation circuit, JKTech flotation specialists conduct and manage metallurgical survey measurements on site. These measurements include sampling and flow rate estimation and have been developed and used over the past fifteen years at many flotation operations. The surveys can be performed around the main streams of the circuit or for individual flotation cells. 3. Mass ...

  • Flotation Process Audit and Bottleneck Identification ...

    The process survey data is handled to form: 1) mass balance of the circuit, 2) flotation kinetic models of the laboratory tests and 3) process simulation model. The mass balance is the basis for performance assessment. also It is also used to obtain the volumetric flow rates and flotation cell residence times, and it may be accompanied by gas dispersion measurement results. The flotation ...

  • MEI Blog: Flotation of chalcocite at very low pH

    7/08/2012  If it does not float in the flotation circuit but floats in the leach circuit, there are two possible reasons: (1) too short flotation time in the flotation circuit; (2) over oxidation in the flotation circuit and removal of the oxidazation products from the surfaces under very acidic conditions of the leaching circuit. If it does not float in the flotation circuit and does not float in the ...

  • Flotation circuit optimisation using modelling and ...

    It is nearly impossible to optimise your flotation circuit performance without knowing the answers to these questions. Over the past decade there has been a significant advance in flotation circuit optimisation through performance benchmarking using metallurgical modelling and steady-state computer simulation. This benchmarking incl des traditional meas res schas grade and Pulp level control ...

  • JKTech Specialist Consulting - JKTech JKTech

    In order to benchmark a flotation circuit, JKTech flotation specialists conduct and manage metallurgical survey measurements on site. These measurements include sampling and flow rate estimation and have been developed and used over the past fifteen years at many flotation operations. The surveys can be performed around the main streams of the circuit or for individual flotation cells. 3. Mass ...

  • Flotation Solutions - Maximising Mineral Recovery Nalco ...

    The goals included improving recovery through their copper flotation circuit, increasing productivity, and ultimately reducing the total cost of operations while ensuring a safe production environment. By introducing FrothPro 507, a specific product in our diverse portfolio of frothers, Nalco Water helped the mine save on maintenance and increase recovery by 2,526 tons per year, amounting to ...

  • Sulphide Flotation - an overview ScienceDirect Topics

    Flotation circuit configuration on most gold mines can be divided into a number of categories, viz. open circuits with no cleaning at all, and open and closed circuits with single stage and two stages of cleaning. Open circuits have the advantage of no feedback from the effects of non–steady-state operation and therefore are inherently more stable than the closed-circuit configuration ...

  • Three issues with your flotation circuit that could be ...

    Problem: If input feeds to a flotation circuit never varied, operating parameters could be set and forgotten without worrying about having to make adjustments. Losses can occur when the mineralogy of the feed changes as the mine progresses through the ore body. Because of the changing feed, a float circuit can lose its optimized state. Recovery losses vary depending on the magnitude of ...

  • gains and losses on gold concentrate gold flotation cip ...

    This circuit is followed by a small cyanidation circuit for recovery of silver (and remaining gold) from the flotation concentrate. Precipitated gold and silver are refined in an induction furnace to produce dore bullion. The crushing plant will operate independently of the mill. In addition, whereas the mill will be primarily run from local ...

  • MEI Blog: Flotation of chalcocite at very low pH

    7/08/2012  If it does not float in the flotation circuit but floats in the leach circuit, there are two possible reasons: (1) too short flotation time in the flotation circuit; (2) over oxidation in the flotation circuit and removal of the oxidazation products from the surfaces under very acidic conditions of the leaching circuit. If it does not float in the flotation circuit and does not float in the ...

  • Flotation - ScienceDirect

    Continuous flotation cannot be performed in a single cell because of losses due to short circuiting of pulp between feed inlet and pulp outlet. It is therefore usual to use 4–12 cells in series. This also increases the residence time of the particles in the cells, giving the slow floating particles a chance to report to the froth layer. Cells in series can be interconnected with an overflow ...

  • 1 Froth Flotation – Fundamental Principles

    1 Froth Flotation – Fundamental Principles Froth flotation is a highly versatile method for physically separating particles based on differences in the ability of air bubbles to selectively adhere to specific mineral surfaces in a mineral/water slurry. The particles with attached air bubbles are then carried to the surface and removed, while the particles that remain completely wetted stay ...

  • 17 July 2019 METALLURGICAL TESTWORK PROGRAM YIELDS

    17/07/2019  Cleaner flotation results on the Master Fresh Composite presented in Table 6 demonstrate the ability to produce high grade marketable concentrate. The flotation recovery represents an open circuit test and does not yet reflect the overall cleaner circuit recovery when a closed-circuit flotation circuit is utilised. These results indicate:

  • SGS MINERALS SERVICES – T3 SGS 1077 MET FLOTATION

    of the entire flotation circuit, and is associated to economic losses and even environmental effects. MET-Flotation-Stabilizer is a multivariable (MIMO) control strategy designed to control the levels in a flotation circuit. It continually monitors the circuit and, at every valve movement, it takes into account the valve action and levels of the entire train of cells. It intelligently makes a ...

  • Metso RCS™ flotation solution – maximizing ore and

    3/03/2020  Recovery losses in the flotation circuit should be seen as a lost opportunity. Combining benefits of circular cell concept with the patented DV™ impeller mechanism, Metso’s RCS™ flotation ...

  • 作者: Metso Outotec
  • (PDF) Reduction of Lead and Zinc loss in Pre-concentration ...

    Reduction of Lead and Zinc loss in Pre-concentration process of Koushk flotation circuit. Conference Paper (PDF Available) October 2014 with 853 Reads How we measure 'reads' A 'read' is counted ...

  • flotAtion heAlth CheCk - MinAssist

    • The efficiency of your flotation circuit and whether mechanical issues or mineralogical drivers cause re covery losses. overview MinAssist has developed a simple, easy to run, targeted process mineralogy program to optimise a grinding circuit. It is designed to allow an operator to take a quick, easy and cost effective look at the mineralogical controls on grinding efficiency, and identify ...

  • An Alternative Circuit for Chalcopyrite-Pyrite Ores with ...

    A simpler flotation circuit with lower operating and capital costs for treatment of such copper-gold-pyrite ores with an elevated pyrite head assay was sought in the described work. After characterising the ore, the objective was to apply bulk rougher flotation of both the copper minerals and pyrite for the copper-gold-pyrite ore at natural pH. Hence, no lime or other pyrite depressants were ...

  • 17 July 2019 METALLURGICAL TESTWORK PROGRAM YIELDS

    17/07/2019  Cleaner flotation results on the Master Fresh Composite presented in Table 6 demonstrate the ability to produce high grade marketable concentrate. The flotation recovery represents an open circuit test and does not yet reflect the overall cleaner circuit recovery when a closed-circuit flotation circuit is utilised. These results indicate:

  • Turn-key flotation retrofit with fast turnaround for ...

    losses and increasing recovery while improving the availability and energy efficiency of the flotation cells. Yamana Gold is a Canadian-based gold producer, with mines and operations in Canada, Mexico, Brazil, Argentina and Chile. The Chapada open pit gold-copper mine in Brazil began production in 2007. It is a relatively low-cost operation and contributes significantly to Yamana’s ...

  • FloatStar - MINTEK MINTEK

    A stable flotation circuit with improved level control and disturbance rejection. Significantly faster start-up times with reduced losses. An optimised circuit with respect to concentrate flow rates, residence times, level setpoints, aeration rates and reagent addition selection. Reduction in grade variation. Brochure Case Studies Contact us . LEVEL STABILISER . Good level stabilisation ...

  • REDUCING THE LOSS OF <12 µm COPPER TO TAILINGS

    losses of liberated particles in the 12 µm fraction is caused by over grinding in the regrind circuit. This conclusion served as the basis to investigate magnetic conditioning that selectively aggregates the 12 µm liberated paramagnetic Cu sulphides to improve their flotation recovery in the cleaner circuit.

  • NEWCREST’S INDUSTRY FIRST APPLICATION ... - Eriez Flotation

    gangue-mineral composite particles as the primary driver for copper losses from the flotation circuit, accounting for over 75% of the contained copper grade in tailings. Figure 2. AMTEL Copper deportment in rougher scavenger tails Since flotation is a surface-controlled process, sulphide mineral exposures of these composite particles lost to tailings are estimated by assessing the perimeter of ...

  • CIP/CIL Modelling - AusIMM

    Circuit Configuration 3 x 1080 m3 (24h of CN) 8 x 120 m3 (7h of CIP) ... CIL Plant (Northern Ontario) treating combined flotation concentrate / tailing 5 CIL (conc only) + 3 CIL (combined conc/tail) Gold in barren solution = 0.044 mg/L Testwork Plant carbon (49 g/t) and multiple densities (50-65% solids) Modelling: variables examined Increased carbon concentration, number of stages and carbon ...