Copper recovery using leach/solvent …
Copper recovery using leach/solvent extraction/electrowinning technology: Forty years of innovation, 2.2 million tonnes of copper annually by G.A. Kordosky* Synopsis The concept of selectively extracting copper from a low-grade dump leach solution followed by stripping the copper into an acid solution from which electrowon copper cathodes could ...Web
اقرأ أكثرOn-stream analysis in copper SX-EW processes
On-stream analysis in copper SX-EW processes. Zaldivar produces Cu cathodes using 4 solvent extraction trains. The plant has been using on-stream X-ray fluorescence analyzers for process monitoring and control. Since an elemental analyzer alone does not provide the critical information for plant operation, it has been …Web
اقرأ أكثر(PDF) A monitoring system for the copper solvent …
A prototype of a novel process monitoring system, based on copper solvent extraction steady-state mass balances, is described as the first step of an advanced process control system development ...Web
اقرأ أكثرState of the art in copper hydrometallurgic processes control
A two level control strategy that stabilizes and optimizes the production of an industrial copper solvent extraction process is presented. The stabilizing layer …Web
اقرأ أكثرDynamic modelling of copper solvent extraction mixer–settler …
Due to increasing copper world demand, there is a strong incentive to apply different processes to copper extraction from low grade ores. The copper Leaching, Solvent Extraction and Electrowinning circuit (LX–SX–EW) (see Fig. 1) is one of the most effective processes for this purpose.In this work, we focus on the liquid–liquid extraction …Web
اقرأ أكثرControl of an industrial copper solvent extraction process
PDF | A two level control strategy that stabilizes and optimizes the production of an industrial copper solvent extraction process is presented. The... | Find, read and cite all the research...Web
اقرأ أكثرThe main monitoring view of the copper SX/EW process …
The modeling and control results are very encouraging for the further testing of the control system in an industrial copper solvent extraction plant. TKK dissertations, ISSN 1795-4584; 97 ViewWeb
اقرأ أكثرAN INDUSTRIAL COPPER SOLVENT EXTRACTION …
system for an industrial copper solvent extraction process. Since the copper solvent extraction process has similar characteristics to those processes in which model predictive control has been successfully applied, the first aim is to develop dynamical process models. A phenomenological steady state simulation model for a copper SX/EW pilot ...Web
اقرأ أكثرA Monitoring System for the Copper Solvent Extraction
Abstract. In this paper the current status of the modeling, simulation and control of the copper-leaching, solvent-extraction and electrowinning process (LX/SX/EW) is investigated. No implementations of advanced process control in the copper LX/SX/EW process have so far been reported. However, model-based control has been …Web
اقرأ أكثرDesign of Large Scale Mixer Settlers in SX Solvent Extraction …
The author's company has recently been awarded a contract for the design of the world's largest solvent extraction plant based on pump-mix mixer-settlers. The plant is designed to extract copper from a leach liquor and has an aqueous throughput of 12,000 imperial gpm. The design is based largely upon data obtained from the company's own ...Web
اقرأ أكثرDYNAMIC MODELING OF AN INDUSTRIAL COPPER …
Control Engineering Practice (1999) L. Magni et al. A stabilizing model-based predictive control algorithm for nonlinear systems Automatica (2001) D.Q. Mayne et al. …Web
اقرأ أكثرFlowsheet considerations for copper cobalt projects
Copper and cobalt production from oxide ore types in the African Copperbelt by agitation leaching followed by solvent extraction (SX) and electrowinning (EW) has been practiced for many years. The Tailings Leach Plant at Nchanga in Zambia was commissioned in 1974 and is still in operation today1. In recent years, more of these types of plants ...Web
اقرأ أكثرControl of an industrial copper solvent extraction process
A steady state model of an industrial copper solvent extraction and electrowinning plant was developed by Aminian et al [7]. The model for the solvent extraction considers mass transfer of copper and iron in the mixers. ... The control of the copper solvent extraction and electrowinning processes relies on operators actively manipulating the ...Web
اقرأ أكثرBACKGROUND REPORT PRIMARY COPPER SMELTING …
refining is solvent extraction/electrowinning (SX-EW) technology, in which dilute sulfuric acid is percolated through copper-bearing ore to leach out the copper. The copper is concentrated through solvent extraction, and is subsequently recovered by plating onto a starter cathode in a process called electrowinning.Web
اقرأ أكثرDYNAMIC MODELING OF AN INDUSTRIAL COPPER SOLVENT EXTRACTION …
Abstract. The aim of this study is to examine the ability of first principles models to describe the behavior of an industrial copper solvent extraction plant. First, the process is introduced and the dynamical models are formulated. Then, the testing environment is described and comparisons of the simulated and real data are presented …Web
اقرأ أكثرMetals | Free Full-Text | Characterisation of Parameters
Solvent extraction (SX) is one of the most widely applied hydrometallurgical processes in copper production from oxide ore. As the high-grade ore deposits have been developed and depleted, now only low-grade ore deposits are being developed and are therefore facing obstacles of extreme processing conditions. This results in leaching …Web
اقرأ أكثرWorld copper solvent extraction plants: Practices and design
This article compiles the results of a review of world copper solvent extraction (SX) plant practices and examines changes in operating practices in the last seven years as compared to previous world copper SX surveys in 1996 and 1999. Trends covered are fiber-reinforced plastic construction mixer box and settler designs, reverse flow settlers, and …Web
اقرأ أكثرCurrent status and limitations of copper SX/EW plants control
The leaching operation is usually controlled using pumps and through programmable logic controllers (PLC). In general, the leaching stage is governed by three factors: recirculated raffinate flow from solvent extraction, PLS dam level, and PLS pump flow from the collector tank into the solvent extraction feed pool.Web
اقرأ أكثرA Monitoring System for the Copper Solvent Extraction
Improvements in plant control would make it possible to keep process variables near their optimal values, thus increasing the amount of copper produced, …Web
اقرأ أكثرDynamic modelling of copper solvent extraction mixer–settler …
In this work we present a general dynamic model for SX mixer–settlers, and applied it to two different units, one located in an extraction stage and the other in a stripping stage of a copper plant. The model includes a non-trivial settler hydrodynamics represented by a set of nonlinear differential equations for both mixer and settler units.Web
اقرأ أكثر(PDF) A Monitoring System for the Copper Solvent Extraction
Copper Operation solvent extraction plant, Wu, M., Nakano, M., She, J.-H., A model-based Proceedings of the ALTA 2002 Copper-7 expert control system for the leaching process in Conference, Castlemaine, Victoria 2002, 23 p. ... Nakano, M., Gui, W., Expert control to a solvent extraction plant, Advances control and fault diagnosis of the …Web
اقرأ أكثرDynamic modelling of an industrial copper solvent extraction …
The dynamic behaviour of an industrial copper solvent extraction mixer–settler cascade is modelled to develop an advanced process control system. First, the process is introduced and the dynamical models are formulated. The testing environment is described and the successful results presented. Only industrially …Web
اقرأ أكثرFlow diagram of an LX–SX–EW process.
With this two level control strategy the production of the copper solvent extraction process is increased by 3–5% and the process variation is decreased by 70–90% compared to the manual ...Web
اقرأ أكثرDynamic modelling of an industrial copper solvent extraction …
The dynamic behaviour of an industrial copper solvent extraction mixer–settler cascade is modelled to develop an advanced process control system. First, the process is …Web
اقرأ أكثرCopper Recovery by Solvent Extraction Techniques
Basic Process Reaction and Design Parameters. The extraction of copper from aqueous solution by the application of organic solvents such as LIX 64N or the Ashland Chemical products Kelex 100 and 120 proceeds chemically, according to the following equation: (2RH) org. + CuSO4 aq. = (R2Cu) org. + H2SO4 aq.Web
اقرأ أكثرManganese metallurgy review. Part III: Manganese control in zinc …
Purification of concentrated manganese sulfate solution by solvent extraction is discussed in this paper. The use of bis(2-ethylhexyl) hydrogen phosphate (D2EHPA) and bis(2,4,4-trimethylpentyl)phosphinic acid (BTMPPA) was studied in removal of impurities from zinc electrowinning anode sludge leachates.Over 99 % of zinc and iron were …Web
اقرأ أكثرSX Solvent Extraction Process Principles Theory
Because of the design of mixers currently used in copper solvent extraction plants, metal transfer in a stage is usually about 85 to 95% of theoretical. For this reason, the values predicted by equilibrium McCabe-Thiele diagrams for the aqueous and organic phases exiting a given stage are seldom realized in an operating circuit.Web
اقرأ أكثرALTA MetBytes
For many years, copper solvent extraction plants had been relatively free from significant fires, attributed mainly to the use of organic diluents with a high flash point. However, the situation changed dramatically in 1999, when a major fire occurred at BHP's Olympic Dam Copper-Uranium operation in South Australia. This wasWeb
اقرأ أكثرWorld copper solvent extraction plants: Practices and design
This article compiles the results of a review of world copper solvent extraction (SX) plant practices and examines changes in operating practices in the last seven years as …Web
اقرأ أكثر68-77:Template Journal 6/25/09 12:12 PM Page 383 Solvent …
Copper solvent extraction circuit (Cu SX) Copper is selectively transferred from the relative low grade Cu PLS into a high-purity electrolyte stream using a copper selective extractant. The extractant employed is an oxime-based copper-selective chelating reagent that is dissolved in a high flashpoint hydrocarbon diluent to make up the organic ...Web
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