AN ADVANCED CONTROL SYSTEM FOR FINE COAL FLOTATION

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A model-based flotation control scheme is being implemented to achieve optimal performance in the handling and treatment of fine coal. The control scheme monitors flotation performance through on-line analysis of tailings ash content. Then, based on an on-line estimate of incremental ash, the pulp level is adjusted using a model-based control algorithm to compensate for feed variations and other process disturbances. Recent developments in sensor technology are being applied for on-line determination of slurry ash content. During the eleventh quarter of this project, Task 7 (Operation and Testing) was nearly completed through the efforts of J.A. Herbst and Associates, Virginia ... continued below

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Luttrell, G. H. & Adel, G. T. January 11, 1999.

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Description

A model-based flotation control scheme is being implemented to achieve optimal performance in the handling and treatment of fine coal. The control scheme monitors flotation performance through on-line analysis of tailings ash content. Then, based on an on-line estimate of incremental ash, the pulp level is adjusted using a model-based control algorithm to compensate for feed variations and other process disturbances. Recent developments in sensor technology are being applied for on-line determination of slurry ash content. During the eleventh quarter of this project, Task 7 (Operation and Testing) was nearly completed through the efforts of J.A. Herbst and Associates, Virginia Tech, and Pittston Coal Company. As a result of this work, a model-based control system has now been installed which can predict incremental ash based on tailings ash content and general plant data, and adjust pulp level accordingly to maintain a target incremental ash. The system has gone through a shake-down period, training has been carried out for plant operators, and the bulk of the control logic testing has been completed with the results of these tests awaiting analysis under Task 8 (System Evaluation). The flotation model has been shown to predict incremental ash quite successfully, implying that this approach may provide the basis for a useful ''soft sensor'' for on-line incremental ash analysis.

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OSTI as DE00014723

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  • Other Information: PBD: 11 Jan 1999

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  • Report No.: DE-AC22-95PC95150--11
  • Grant Number: AC22-95PC95150
  • DOI: 10.2172/14723 | External Link
  • Office of Scientific & Technical Information Report Number: 14723
  • Archival Resource Key: ark:/67531/metadc628319

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  • January 11, 1999

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  • June 16, 2015, 7:43 a.m.

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  • April 15, 2016, 1:39 p.m.

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Luttrell, G. H. & Adel, G. T. AN ADVANCED CONTROL SYSTEM FOR FINE COAL FLOTATION, report, January 11, 1999; Morgantown, West Virginia. (digital.library.unt.edu/ark:/67531/metadc628319/: accessed October 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.