Medium density control for coal washing dense medium cyclone circuits

Lijun Zhang, Xiaohua Xia, Jiangfeng Zhang

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The dense medium cyclone (DMC) process used in coal beneficiation plants is studied from a control system perspective. Employing the dynamic model of the DMC process derived from mass flow balance, a model-based control strategy is proposed. The controller adjusts the density of medium used to enhance separation in the DMC process according to measurements on percentages of different components in raw coal. The first objective of the control is to maintain the carbon content in the clean coal to a set level. The second purpose is to minimize energy consumption of the DMC process in view of the fast increasing electricity price. The controller solves an optimization problem formulated to determine the density of medium whenever new measurements are available. Both coal quality and DMC operational constraints are accounted for. Simulations, based on measured plant data, are carried out to verify the feasibility and effectiveness of the control strategy designed. The results show that the designed controller is able to fulfill its purpose satisfactorily when the characteristics of the raw coal varies and when measurement uncertainties are in presence.
LanguageEnglish
Pages1117-1122
Number of pages6
JournalIEEE Transactions on Control Systems Technology
Volume23
Issue number3
Early online date17 Apr 2015
DOIs
Publication statusPublished - May 2015

Fingerprint

Coal
Networks (circuits)
Controllers
Beneficiation
Dynamic models
Energy utilization
Electricity
Coal washing
Control systems
Carbon

Keywords

  • control system synthesis
  • measurement uncertainty
  • coal beneficiation plants
  • coal quality
  • coal washing dense medium cyclone circuits

Cite this

@article{3873be0fae3d4bf0864cc4a9e186f544,
title = "Medium density control for coal washing dense medium cyclone circuits",
abstract = "The dense medium cyclone (DMC) process used in coal beneficiation plants is studied from a control system perspective. Employing the dynamic model of the DMC process derived from mass flow balance, a model-based control strategy is proposed. The controller adjusts the density of medium used to enhance separation in the DMC process according to measurements on percentages of different components in raw coal. The first objective of the control is to maintain the carbon content in the clean coal to a set level. The second purpose is to minimize energy consumption of the DMC process in view of the fast increasing electricity price. The controller solves an optimization problem formulated to determine the density of medium whenever new measurements are available. Both coal quality and DMC operational constraints are accounted for. Simulations, based on measured plant data, are carried out to verify the feasibility and effectiveness of the control strategy designed. The results show that the designed controller is able to fulfill its purpose satisfactorily when the characteristics of the raw coal varies and when measurement uncertainties are in presence.",
keywords = "control system synthesis, measurement uncertainty, coal beneficiation plants, coal quality, coal washing dense medium cyclone circuits",
author = "Lijun Zhang and Xiaohua Xia and Jiangfeng Zhang",
note = "(c) 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.",
year = "2015",
month = "5",
doi = "10.1109/TCST.2014.2349793",
language = "English",
volume = "23",
pages = "1117--1122",
journal = "IEEE Transactions on Control Systems Technology",
issn = "1063-6536",
number = "3",

}

Medium density control for coal washing dense medium cyclone circuits. / Zhang, Lijun; Xia, Xiaohua; Zhang, Jiangfeng.

In: IEEE Transactions on Control Systems Technology, Vol. 23, No. 3, 05.2015, p. 1117-1122.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Medium density control for coal washing dense medium cyclone circuits

AU - Zhang, Lijun

AU - Xia, Xiaohua

AU - Zhang, Jiangfeng

N1 - (c) 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.

PY - 2015/5

Y1 - 2015/5

N2 - The dense medium cyclone (DMC) process used in coal beneficiation plants is studied from a control system perspective. Employing the dynamic model of the DMC process derived from mass flow balance, a model-based control strategy is proposed. The controller adjusts the density of medium used to enhance separation in the DMC process according to measurements on percentages of different components in raw coal. The first objective of the control is to maintain the carbon content in the clean coal to a set level. The second purpose is to minimize energy consumption of the DMC process in view of the fast increasing electricity price. The controller solves an optimization problem formulated to determine the density of medium whenever new measurements are available. Both coal quality and DMC operational constraints are accounted for. Simulations, based on measured plant data, are carried out to verify the feasibility and effectiveness of the control strategy designed. The results show that the designed controller is able to fulfill its purpose satisfactorily when the characteristics of the raw coal varies and when measurement uncertainties are in presence.

AB - The dense medium cyclone (DMC) process used in coal beneficiation plants is studied from a control system perspective. Employing the dynamic model of the DMC process derived from mass flow balance, a model-based control strategy is proposed. The controller adjusts the density of medium used to enhance separation in the DMC process according to measurements on percentages of different components in raw coal. The first objective of the control is to maintain the carbon content in the clean coal to a set level. The second purpose is to minimize energy consumption of the DMC process in view of the fast increasing electricity price. The controller solves an optimization problem formulated to determine the density of medium whenever new measurements are available. Both coal quality and DMC operational constraints are accounted for. Simulations, based on measured plant data, are carried out to verify the feasibility and effectiveness of the control strategy designed. The results show that the designed controller is able to fulfill its purpose satisfactorily when the characteristics of the raw coal varies and when measurement uncertainties are in presence.

KW - control system synthesis

KW - measurement uncertainty

KW - coal beneficiation plants

KW - coal quality

KW - coal washing dense medium cyclone circuits

U2 - 10.1109/TCST.2014.2349793

DO - 10.1109/TCST.2014.2349793

M3 - Article

VL - 23

SP - 1117

EP - 1122

JO - IEEE Transactions on Control Systems Technology

T2 - IEEE Transactions on Control Systems Technology

JF - IEEE Transactions on Control Systems Technology

SN - 1063-6536

IS - 3

ER -