Redox potential control during flotation of …
Control of Eh using NaCIO as a function of pH in a flotation cell for a Merensky ore pulp. When the pH was adjusted to pH 11 by the addition of NaOH the natural Eh was found to have decreased to a ...
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Flotation and cyanidation process control
the invention provides an approach to processing gold-copper ores involving on-line control of total economical value of integrated ... This equation does not direct automatically maximizing the value of the concentrate grade or minimizing the value in flotation tails. Under some conditions the expert system may take action which results in ...
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Flotation of copper oxide minerals: A review
The pulp pH is more stable and easier to control using 2,5-dithiol-1,3,4-thiodiazole as an activator, which ensures effective recovery of gold, silver, and other associated precious metals. ... We propose the activation mechanism of ammonium/amine salt in sulfidization flotation of copper oxide minerals. Under basic conditions, ...
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Design of a Robust MPC for Copper Recovery in an Industrial …
This paper presents the design of a RMPC (Robust Model Predictive Controller) for effective control of the copper recovery in an industrial flotation column. Copper ore properties vary …
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Mixed thiol collector system in the flotation of copper ore …
The recovery and concentration of the nickel sulphide mineral, pentlandite, present several challenges due to its relatively slow flotation, leading to excessive hydrophilic gangue minerals in the ...
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Flotation Plant Process Control & Automation
Sodium cyanide is a commonly used depressant of non-valuable sulphides in copper sulphide flotation. The optimum quantity of cyanide needed to depress the sulphide …
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Sources, Performance and Mechanisms of Metal …
Metal ions may have vastly different effects on the flotation of sulfide copper ore under different conditions, and metal ions can have an impact on both the sulfide flotation of oxidized copper ore and the flotation of sulfide …
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Design and Comparison of Fractional-Order Controllers in …
This research highlights the effectiveness of fractional control in enhancing flotation processes and introduces a novel application of fractional control techniques in this area.
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Column Flotation of Copper
The bias control loop adjusts the valve on the tailings line to maintain a constant bias between he tailings flowrate and feed flowrate. The pulp level control loop adjusts the …
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Design and Comparison of Fractional-Order Controllers in …
This work explores efficiency improvements in the copper flotation stage, a complex nonlinear, multivariable process subject to numerous perturbations. The primary objective is to design a fractional-order PID (FOPID) control strategy and a fractional-order model reference …
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Oxidation-reduction effects in the flotation of copper …
on the surface of the minerals and accordingly the flotation behaviour. In this study, the metallurgical perfor-mance of typical copper sulfide minerals, molybdenite as well as gangue minerals (e.g., pyrite, tennantite, and enargite) under different pH and Eh conditions of the flotation cell were investigated. The copper and molyb-
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Copper flotation profit and control-system accuracy
Obtaining high recovery in copper flotation plants has been always under investigation in recent years. Misreported copper into tailing dramatically declines copper recovery. ... (96)00168-2 COPPER FLOTATION PROFIT AND CONTROL-SYSTEM ACCURACY R. Tenno and S-L. Jiimsa-Jounela Laboratory of Process Control and Automation, Helsinki University of ...
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Water quality effects on flotation: Impacts and control of …
Boliden Kevitsa Mining Oy, a Cu-Ni-PGE concentrator recycles 90–95% of its water for use in the plant. The quality of recycled water tends to deteriorate as various elements and compounds such as Ca, Na, Mg, K, SO 4 2− and residual reagents accumulate. The accumulation shows seasonal cyclic variation that has an impact on flotation performance.
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Design and Comparison of Fractional-Order Controllers in Flotation …
This work explores efficiency improvements in the copper flotation stage, a complex nonlinear, multivariable process subject to numerous perturbations.
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Contemporary advanced control techniques for flotation …
Zavala et al. (1995) compared three algorithms in the control of a simulated copper flotation plant: (1) a multivariable DMC algorithm, (2) an expert rule-based controller and (3) …
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OneMine | Computer Control of a Flotation Circuit
At this point in time one of the copper-zinc circuits is under computerized metallurgy control.The first step in this control is the use of an ARL on-stream x-ray analyzer, coupled with a Honeywell 21 computer which types out assays and recoveries for each individual circuit. ... The flotation cells have automatic level controls which can be ...
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Flotation of Copper Sulfide Ore Using Ultra-Low Dosage of …
A previous study revealed that the addition of depressants could be used to control the oxidation state of the pyrite surface, which is the key ... while the recoveries of gold and silver were 9.22% and 26.66%. Therefore, the present work achieved the recovery of copper sulfide flotation under the condition of an ultra-low dosage of combined ...
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Probability density function of bubble size based reagent …
This work aims to develop bubble size PDF based reagent dosage control for roughing flotation of copper flotation plants. Based on PDF modeling work using B-Spline estimator (Wang, 2000, Guo and Wang, 2010, Yang et al., 2009, Forbes et al., 2004), an entropy based B-Spline estimation technique is investigated to depict the PDF model according ...
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Relation of bubble size, grade and recovery in the copper flotation
1. Introduction. Today, the flotation method, in which many parameters are effective, remains one of the most significant enrichment methods. According to Nagaraj [1] anything put into the flotation cell affects froth characteristics, as well as physical and operational parameters. The identities that are described as collectors, frothers and modifiers are necessarily blurred in …
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Operational adjustment modeling approach based on …
The research background of this article is a real-world copper flotation plant in Jiangxi Province, China. The plant-wide copper flotation process includes roughing, separate-roughing, cleaning, and scavenging. ... A scenario-based framework for the integration of scheduling and control under multiple uncertainties. Journal of Process Control ...
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Designing the Optimal Flotation Circuit – The Prominent …
Satisfactory separation of the fluorine-rich gangue material from the valuable copper sulfides requires highly efficient cleaner flot- ation. This is done by a combination of washed froth …
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Principles and techniques for efficient copper …
A characteristic feature of all variants of copper-zinc ore enrichment schemes is multi-stage grinding and flotation, additional flotation in a separate cycle of copper sulphide varieties lost in the tailings of copper concentrate cleaning, additional …
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A COMPLEMENTARY MILLING AND FLOTATION …
3.2. MillStar and FloatStar Combined Control System Performance After the commissioning of the MillStar system was completed, the performance of the flotation process could be compared under plant control (only using FloatStar Level Stabiliser and manual milling control), FloatStar Level Stabiliser with FloatStar Flow Optimiser and
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Oxidation-reduction effects in the flotation of copper …
Redox potential (Eh) control plays a significant role during sulfide mineral flotation by influencing the reactions on the surface of the minerals and accordingly the flotation behaviour.
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Sequential Copper–Lead–Zinc Flotation
With this process, copper was recovered first with MBS depression of lead, zinc and pyrite. Lead was recovered after conditioning, utilizing cyanide as the base depression scheme to control sphalerite and pyrite. In these tests, a zinc flotation was also performed to measure the metallurgical performance of that metal.
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Optimizing the Rougher Flotation Process of Copper Ore
Metallurgically, it becomes complex to take the process under control according to the optimal expected in the feeding of the process. In addition, it should be added that because the desired separation cannot be achieved in a single stage, several coupled stages are used, which are called flotation circuit. ... To model the copper ore ...
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Modelling for froth flotation control: A review
Froth flotation is the largest tonnage separation in mineral processing by which valuable mineral is separated from waste rock. Advances in control and optimisation of the froth flotation process are of great relevance since even very small increases in recovery lead to large economic benefits (Ferreira and Loveday, 2000, Maldonado et al., 2007). ...
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Quality Prediction in Copper Flotation Process Based on …
Copper flotation plays a vital role in the extraction of non-ferrous metals. With the increasing demand for metals such as copper, the prediction of quality has become crucially urgent. It can help us identify potential quality issues in advance, reduce defective products and production costs, and ensure that products meet standards and market demands. However, in achieving …
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Sequential Copper–Lead–Zinc Flotation
With this process, copper was recovered first with MBS depression of lead, zinc and pyrite. Lead was recovered after conditioning, utilizing cyanide as the base depression scheme to control sphalerite and pyrite. In these tests, …
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A cascaded recognition method for copper rougher flotation …
Based on a systematic analysis of key variables in flotation process Aldrich et al. (2010) pointed out that the key to control flotation, a dynamic system of a fairly slow speed, lies in determining an appropriate control range under different initial conditions so that the flotation operation can be relatively satisfactory and even optimized.
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