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- W3214922158 abstract "Dense medium cyclones ave used extensively for washing Australian coals. Hence, the control of dense medium cyclone circuits to obtain the maximum possible recovery at the product ash specified by the sales contract is economically desirable. A nucleonic on-line coal ash monitor was used to measure the ash in the dense medium cyclone product in two washeries. Data from the ash monitor and the washery instruments was logged using a digital computer. Two substantial software packages were developed to log the data, and display it as histograms and mimic diagrams on an interactive colour graphics terminal. Dynamic simulation models of the dense medium circuits in the two washeries were developed, and tuned using the logged data. The models were used to investigate control strategies and circuit modifications that could be applied to the dense medium circuits. Tests in one washery showed that its dense medium cyclone circuit was not amenable to ash control. Modifications to the circuit and its control system, to permit control of product ash, were designed, and evaluated using a dynamic model. A simple product ash feedback control loop was tested in the dense medium circuit of the other washery, but with little success. A modification designed to improve the response of the circuit to changes in medium density set point was tested with a model and then implemented in the washery. The circuit response improved as predicted. Subsequent attempts to control product ash have met with greater success." @default.
- W3214922158 created "2021-12-06" @default.
- W3214922158 creator A5021412482 @default.
- W3214922158 date "2021-09-30" @default.
- W3214922158 modified "2023-10-18" @default.
- W3214922158 title "Dynamic simulation and automatic control" @default.
- W3214922158 doi "https://doi.org/10.14264/6a0bb6b" @default.
- W3214922158 hasPublicationYear "2021" @default.
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