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Journal ArticleDOI

A Generalised Investigation of Adaptive Optimisation in the Chemical Processing of Minerals

01 Jul 1985-IFAC Proceedings Volumes (Elsevier)-Vol. 18, Iss: 6, pp 309-314
TL;DR: In this paper, the authors investigated the adaptive optimisation strategy of adjusting operating conditions to maintain optimum process performance as the feed quality varies by computer simulation of chemical processes for the treatment of ores.
About: This article is published in IFAC Proceedings Volumes.The article was published on 1985-07-01. It has received None citations till now.
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Journal ArticleDOI
TL;DR: In this paper, a variable activation energy model is proposed for low-grade ores, where rate-limiting effects are lumped together as an Arrhenius activation energy barrier which is related to the conversion.

31 citations

01 Jan 1982
TL;DR: In this paper, the authors used simulation to reveal the characteristics of ores and processes that lead to potential advantages of adaptive optimisation over ore-blending to overcome the effects of feed variations in mineral processing plants.
Abstract: Computer simulation is revealing the characteristics of ores and processes that lead to potential advantages of adaptive optimisation over ore-blending to overcome the effects of feed variations in mineral processing plants. Results are reported for optimisation of the residence time in a chemical process for parcels of ore containing variable quantities of valuable metal and proportions of a refractory component. The greatest potential benefit of adaptive optimisation is an increase in the throughput, but a reduction in operating costs is also achieved. The range of the proportions of the variable metal occurring as the refractory component is the most significant characteristic, the difference in reactivity of the components is unimportant, the value of the metal and the range of metal assays have little affect.

1 citations

01 Jan 1983
TL;DR: In this article, the authors derived the solids RTD in any stage of completely mixed reactors connected in series with no inter-stage backflow, using either the Dirac function δ(0) or the probability density function of the sum of independent random variables.
Abstract: When solid particles react with a fluid,the overall rate is influened by the fraction of the solidunconverted as well as by the operating conditions such as temperature and pressure.Calculation of solidsconversion in the individual reactor of a multi-stage reactor system has therefore to be based upon thesolids residence time distribution (RTD) in the respective stages.By using either the Dirac function δ(0) or the probability density function of the sum of independentrandom variables,the solids RTD in any stage of completely mixed reactors connected in series with nointerstage backflow has been obtained.The latter method has also been used in deriving general formu-las for the calculation of solids conversion when the order of chemical reaction is simple.For complexchemical reaction rate equations a stagewise procedure for numerical computation is proposed,and twocases are discussed according to whether the rate equation is expressed in its integral or differential formrespectively.

1 citations