Weibull partition surface representation for gravity concentrators

Rao, B. Venkoba

doi:10.1016/j.mineng.2004.03.001

Cited by 9 publications

(3 citation statements)

References 5 publications

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“…To summarize the separation efficiency of the device, a Weibull function (Rao, 2004) was fitted to the data according to eq (1). Fitting the four parameters (Y p , r p , p and q) was done with the Levenberg-Marquardt least squares algorithm in Matlab.…”

Section: Partitioning Function Of the Mdsmentioning

confidence: 99%

Observations on the separation of iron ore in a prototype batch jig

Naude

Lorenzen

Колесников

et al. 2013

International Journal of Mineral Processing

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Section: Partitioning Function Of the Mdsmentioning

confidence: 99%

Observations on the separation of iron ore in a prototype batch jig

Naude

Lorenzen

Колесников

et al. 2013

International Journal of Mineral Processing

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“…Another technique that has been used to model the size-density partition surface of a DMC without the use of the pivot phenomena is stochastic modelling (Rao et al, 2003). A model, which incorporates both size and density partitions, was developed by Rao (2004) who used a Weibull function. This efficiency model makes use of pivot coordinates and density that is size-dependent, as developed by Plitt (1971).…”

Section: Introductionmentioning

confidence: 99%

The development of dynamic models for a dense medium separation circuit in coal beneficiation

Meyer

Craig

2010

Minerals Engineering

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a b s t r a c tOften the most difficult step in establishing a control system is the development of a suitable dynamic process model. As such a model is not available elsewhere, a first principle dynamic mathematical model was developed for a coal dense medium separation circuit. Each unit operation was modelled individually and then integrated together to form a complete non-linear state-space model for the circuit. This model was used to simulate the process and it was validated using real process data derived from a plant experiment.When developing models from first principles, it is necessary to estimate the model parameters. These parameters, specifically for non-linear state-space relationships, require a unique solution. A parameter identifiability method was used to show that the non-linear dynamic models developed have unique parameters for a specific set of input-output data.

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“…As a rule, in the reference books and papers only values of averaged density of minerals are presented. It should be noted that many scientists indicate the significance of mineralogical characteristics of economic mineral grains for the enrichment process (for instance, [11][12][13][14][15][16]). Methods of mineralogical analysis indicate that in composition of heavy concentrates and middlings obtained from the productive sands (size of sand particles ranges from 0.05 to 2.5 (3.0) mm) of gold and diamond placers as well as from a set of spoil (terrace) rocks, from 7-10 up to 25-32 mineral kinds *Address correspondence to this author at the Dept.…”

Section: Introductionmentioning

confidence: 99%

The Main Reason for Mineral Loss in Gravity Dressing

Surkov¹,

Samykina²,

Eppelbaum³

et al. 2008

TOMPJ

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Gravitational concentration (gravity dressing) is the oldest of all forms of mineral processing used by humanity more than 25 centuries. This method was the most widely applied procedure of mineral enrichment till the end of second millennium. Physically mineral concentration is based on separation of geological rocks and minerals of different specific density by their relative movement in response to the gravity and some additional forces. However, such an enrichment a priori cannot provide a high output of desired minerals. The authors have aimed to attract an attention to significant losses of native gold and diamonds by traditional scheme of their gravitational concentration. Detailed consideration of density and form of native gold and diamonds indicates that fragmental (placer generating) minerals with the different values of average density may have close and identical sizes (on two axes) in heavy concentrates (schlich) and middlings. These dense parameters essentially influence to conditions of these minerals accumulation in natural conditions and degree of their extraction in technological processes of gravitational concentration. The materials presented in the paper span the analyzed mineralogical data from about twenty economic deposits located in various regions of the world (mainly the authors' personal results).

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Weibull partition surface representation for gravity concentrators

Cited by 9 publications

References 5 publications

Observations on the separation of iron ore in a prototype batch jig

Observations on the separation of iron ore in a prototype batch jig

The development of dynamic models for a dense medium separation circuit in coal beneficiation

The Main Reason for Mineral Loss in Gravity Dressing

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