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modeling of gold cyanidation

3 rows De Andrade Lima, L.; Hodouin, D. A lumped kinetic model for gold ore cyanidation. ...

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  • Mathematical modeling of fate and transport of cyanide

    Mathematical modeling of fate and transport of cyanide

    The model derived from the AdaBoost method shows an average variation of 581 g/day in the volume of cyanide tailings. Thus, the important results of this paper are the presentation of 3D numerical and especially conceptual models according to the 3D cyanide variation in the sulfide gold mine tailings and governing physic/chemical parameters.

  • Model for heap leaching of gold ores by cyanidation

    Model for heap leaching of gold ores by cyanidation

    Jan 01, 1997 The objective of this study is to develop a model which describes the heap leaching process for gold extraction from non-refractory ores. The model considers the cyanidation reaction in a bed of uniformly sized spherical porous mineral particles, through which the leaching solution trickles.

  • Simulation of leaching process of gold by cyanidation

    Simulation of leaching process of gold by cyanidation

    Jan 01, 2020 Abstract. Sodium Cyanide (NaCN) has been used to recover gold from gold bearing ores. This work aims to develop a simulation model of leaching process by using cyanide solvent for the dissolution of gold by using HSC simulator. The results from this simulation were compared with other researcher which employed Aspen Plus and it shows very good ...

  • PDF Gold Recovery Modeling Based on Interval Prediction

    PDF Gold Recovery Modeling Based on Interval Prediction

    model parameters of the gold and cyanide have been identifi ed and calibrated based on a set of real industrial data from an Australi an g old processi ng p lant [14, 25-27] .

  • Artificial neural network modeling of gold dissolution in

    Artificial neural network modeling of gold dissolution in

    Dec 02, 2011 The effects of cyanidation conditions on gold dissolution were studied by artificial neural network (ANN) modeling. Eighty-five datasets were used to estimate the gold dissolution. Six input parameters, time, solid percentage, P80 of particle, NaCN content in cyanide media, temperature of solution and pH value were used. For selecting the best model, the outputs of models were …

  • The leaching and adsorption behaviour of gold ores

    The leaching and adsorption behaviour of gold ores

    4.4 the effect of copper cyanide on gold leaching from oxide and sulphide ores 110 4.5 summary 114 chapters preg-robbing phenomena in the cyanidation of gold ores 116 5.1 objectives of this chapter 116 5.2 background information 116 5.3 preg-robbing behaviour by the ores at low cyanide concentrations 118

  • PDF Gold Extraction and Recovery Processes For Internal

    PDF Gold Extraction and Recovery Processes For Internal

    Modeling of heap leaching of gold by cyanidation A mathematical model for heap leaching of gold ores by cyanidation was developed by Sanchez-Chacon and Lapidus in 1997 which describes gold heap leaching as a function of the mass transport steps involved, employing a rigorous kinetic expression to describe gold cyanidation [7].The model ...

  • Leaching of gold ores with high cyanicides a physico

    Leaching of gold ores with high cyanicides a physico

    of gold and cyanicides), cyanide concentration, and concentration of copper- and sulfur-bearing minerals. Khalesi et al. (2009) have developed an integrated grinding and liberation model for the size reduction of gold ores and a simulator of gold grain exposure of ground ore to add the liberation of the gold ore to the leaching model [9, 10].

  • Optimizing and evaluating the operational factors

    Optimizing and evaluating the operational factors

    Dec 08, 2015 The cyanidation process is affected by a number of influential parameters, such as the availability of oxygen at the solid–liquid interface, the pH and Eh of the solid–solvent suspension, the presence of ions other than CN − in solution, the cyanide concentration, the particle size of the mineral, the temperature, the surface area of gold exposed, the purity of the gold, the ...

  • Modeling the influence of slurry temperature on gold leach

    Modeling the influence of slurry temperature on gold leach

    Aug 01, 2006 The Fort Knox Mine is located in Alaska’s interior where the average ambient air temperatures range from −24 C (−11 F) in January to 16 C (61 F) in July. The mill processes a free-milling gold ore utilizing a gravity recovery circuit and conventional cyanide leach/carbon-in-pulp circuits. Plant slurry temperature cycles seasonally and allows for a unique opportunity to measure the ...

  • MODELING OF GOLD CYANIDATION

    MODELING OF GOLD CYANIDATION

    Keywords: Gold cyanidation; Leaching; Reaction kinetics; Modeling The chemistry of gold dissolution in alkaline cyanide solution has continually received attention and new rate equations expressing the gold leaching are still developed. The effect of leaching parameters on gold cyanidation is studied in this work in order to optimize the leaching process. A gold leaching model, based on

  • Modeling of Gold Cyanidation LUTPub

    Modeling of Gold Cyanidation LUTPub

    The chemistry of gold dissolution in alkaline cyanide solution has continually received attention and new rate equations expressing the gold leaching are still developed. The effect of leaching parameters on gold gold cyanidation is studied in this work in order to optimize the leaching process. A gold leaching model, based on the well-known shrinking-core model, is presented in this work.

  • A mathematical model of the leaching of gold in cyanide

    A mathematical model of the leaching of gold in cyanide

    Jan 01, 1997 Mathematical model of gold leaching The leaching of gold from an ore can be described by the following reaction: 4Au + 8CN-+ OZ + 2H20 --j 4Au(CN)Z + 40H- (4) Since the rate of this reaction is dependent on the available surface, the mass balance for the leaching of gold in a batch reactor is given by: dNA- _ rAu A (5) dt where NArepresents the number of moles of solid (particulate) gold in the batch reactor, rArepresents the rate of consumption of gold …

  • Modelling and simulation of gold ore leaching

    Modelling and simulation of gold ore leaching

    A leaching model for gold ore that takes into account the impact of cyanide and oxygen concentrations as well as gold surface exposure on leaching performance is developed. Cyanide consumption is estimated by an empirical model that is a function of ore particles size distribution as well as cyanide, copper and sulphur concentrations.

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