- مبلغ: ۸۶,۰۰۰ تومان
- مبلغ: ۹۱,۰۰۰ تومان
A mathematical model of the column flotation process should, for given feed characteristics and design and operating variables, predict metallurgical performance. The model may also be used for design, control and optimisation of the colmrm flotation process. In general, the mathematical models nuty be divided into two broad categories namely, mechanistic models and empirical models. One of the main advantages of mechanistic models is that unlike empirical models they provide a sound basis for extrapolation . Unfortunately, the mechanisms governing the column process are complex and in general not sufficiently well understood at the present time to formulate a mathematical model from theory. Therefore, all the mathematical models of the colunm flotation process which have been proposed to date are empirical models. The mathematical models available at present in the literature may further be divided into two categories namely, kinetic models and non-kinetic models~ Kinetic models as the name suggests are models which are either wholly based on flotation kinetics, or flotation kinetics is one of the main components of the overall model form. In general, flotation kinetics is the study of the variation of froth overflow product with time, and the quantitative identification of all rate-controlling variables . For flotation columns, tbllowing the study by Finch and Dobby , models based on axial dispersion theory have become the most conmaon in this category. Any model which does not fall under the category of a kinetic model is a non-kinetic model. Models based on the response surface methodology are in this category. Tiffs paper discusses the various mathematical models for column flotation available under the categories of kinetic models and non-kinetic models. Also, the respective shortcomings of both model categories are identified.