SVIBOR - Project code: 2-07-275


Strossmayerov trg 4, HR - 10000 ZAGREB
tel.: +385 1 459 44 44, fax: +385 1 459 44 69


SVIBOR - Collecting Data on Projects in Croatia

Project code: 2-07-275


Main researcher: JURIŠIĆ-ZEC, MARICA (19422)

Type of research: applied
Duration from: 01/01/91. to 12/31/93.

Papers on project (total): 5
Institution name: Fakultet elektrotehnike i računarstva, Zagreb (36)
Department/Institute: Department of automatic control and computer engineering in automation
Address: 41000 Zagreb, Unska 17,
City: 10000 - Zagreb, Croatia
Phone: 385 (0)1 6129-795
Phone: 385 (0)1 278-571

Summary: The overall cement production process, from raw material excavation site up to clinker workshop, have to be decentralized and hierarchycaly optimally controlled. On the lowest process level the mathematical model for every single process unit has to be proved, the identification procedures and optimal control criteria for each process operation have to be examined and tested. The results from previous researches, with real data improved mathematical models of some process unit, will be implemented in project too. The overall production process control strategy has to be installed on the coordination level of control system. The highest control level, the organisation level, will implement methodology, tools and techniques for managing cement production with continuous improvement in quality and productivity. Optimal control of usage the raw material excavation site. Mathematical modelling of raw material base, comparative estimate of deterministic and stochastic procedures, the choice of criteria and methods for results validation. Dynamic analysis of clinker kiln process. The theoretical and experimental mathematical model. The selection and application of some approximation methods in the order model reduction procedures. Project CEMTIS, software for decentralized and hierarchycal computer control in cement production. The implementation and coordination of control procedures of all process operation units, design of relevant data bases.

Keywords: Cement, Cement stone, Oil well cement, Cement production, output quality and energy consumption, ecological problems, computer process control, optimal control, decentralised control, hierarchycal control, mathematical modelling, estimation, identification, model order reduction, software for process control, on-line real-time process control.

Research goals: Study addresses application of modern theoretical methods, and by using SW development tools, in development of computer based control system for cement production, that integrates better quality control, less energy consumption, reduction of raw material usage and lower environment polution. Project consists of 4 elements integrated in the development process: A. Control of raw material excavation site and blending process A.1 Mathematical model of raw material base * A.2 Mathematical model of primary blending process A.3 Optimalization of raw material blending process B. Raw material grinding and composition process control * B.1 Mixing model in raw material grinding process * B.2 Math. model of finaly homogenisation * B.3 Math. model of raw material composition * B.4 Optimalization of raw material composition C. Clinker kiln system control * C.1 Clinker kiln process modelling * C.2 Heat exchange system model C.3 Rotary kiln system modelling * C.4 Clinker cooler system model C.5 Optimalization of clinker kiln system D. Overall clinker production process control D.1 Properties of overall clinker production process model D.2 Properties of production process control model D.3 Production process control decomposition and design of decentralised and hierarchycal computer process control To achieve necessary results efforts are not primarily in selection of appropriate computerised system, but also in understanding technological process characteristics, modern production techniques, high complexity and variety of problems that require multidisciplinary expertise, experience in usage of diverse CASE tools applied. Expected benefits of this study : a) Enhancing system understanding; development of neccesary mathematical models, criteria and control algorithms for single process unit or technique. b) Standardised approach to design and implementation methodologies, to become universal to computer process control in chemical and process industry. c) Application, testing and adaptation of computer aided tool support and new SW engineering methodologies in design and implementation of computer process control (CAD, CAE, KBS, simulation and programming languages and packages). d) Design and development of specific system for computer control in cement industry. Successful implementation of above results could set a frame workfor standard methodology in designing control systems in chemicaland process industry. (* indicates subprojects accomplished in earlier phases of research activities.)


  1. Name of institution: Dalmacijacement
    Type of institution: Economical/Production
    Type of cooperation: Joint project
    City: Solin, Hrvatska

  2. Name of institution: CEMTRA d.o.o.
    Type of institution: Other
    Type of cooperation: Joint project
    City: 10000 - Zagreb, Croatia

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Last update: 10/05/95