Metalurški proizvodni procesi sastoje se od kontinuiranih, različitih tehnoloških procesa i sastoje se od toka materijala kao i opreme i strojeva. Specifičnosti metalurških proizvodnih preocesa su: ...dugački proizvodni procesi, velika inertnost procesa, struktura “stabala” u proizvodnom procesu (od korijena pa do lišća), visoka kapitalna ulaganja itd. Takva svojstva metalurških proizvodnih procesa rezultiraju nekim specifičnostima proizvodne logistike. Članak se bavi ovim specifičnostima i pojašnjava korištenje postojećih uvjeta u proizvodnom procesu kod kontinuiranog ljevanja čeličnih ploča, njihovo zagrijavanje u pećima na temperaturu valjanja i valjanje istih u čeličanama.
In general, management is the planning and coordination of all processes and their elements in enterprises in order to achieve the objectives with the highest efficiency. The basic management tools, ...especially in companies with complex production processes with high inertia and long production time, include balance models. The paper points out the methodology, principles and importance of balance models in metallurgy and describes the methodology for material-energy, capacity and economic balance of this process.
Metallurgical production processes (MPP) consist of continuous and discrete types of technology operation, transport, manipulation and storing processes regards the flow of material and also the ...equipment and machines. Other specifics are: long production cycles, great inertia, tree structure of production processes (from roots up to the leaves), high level of investments etc. These characteristics resulted in some specifics of production logistics. This article deals with these specifics and explains it using the conditions of production processes of continuous slab casting, their heating in push furnaces at rolling temperature and rolling itself in hot wideband steel mill.
In management practice there are many activities which cannot be modeler solved by mathematical-analytical method, but one is able to successfully solve them. For real solution of the logistic ...problem, mainly in the field of capacity planning, operative planning and production scheduling, model creation most frequently appliesa heuristic approach. The heuristic approach-method is the creation of a model on the basis of experience, practice, approximate idea of the man from the solutions of similar problems. In this paper is described a principle and rules for creating heuristic models in management and logistic activities of metallurgy manufacturing,
Due to keeping the continuous changes of the chemical composition of alloys in the sequence of manufactured products it is required to apply a specific approach at creation of models of production ...scheduling. The production schedule is created for the workplace continuous process at first, and then the following production schedules of work are derived for another workplaces. The model was implemented in the company RS Slovakia s.r.o.
In the paper a methodology and model for “In-process inventories calculation“ in the metallurgy production conditions is described. The model was designed based on the factors affecting the ...in-process inventories levels. The inprocess inventories levels have to respect different efficiency of the aggregates in sequence, idle times, technological safety and the production continuity. For the calculation of the in-production inventories levels a dynamic model was designed. In the paper the results are compared from the analyses of real metallurgical production division and this model too.
The present paper describes the methodology of the simulation model design applied in the analysis and parameter optimization of the large scale logistics system (LS) in metallurgy. The first part of ...the papers describes the method and steps of the simulation model design. The second part describes the analysis of the really complicated logistics system. Differences in large scale simulation model design are mainly in the obtaining of the data for individual elements model. Each element inside of LS has very complicated structure of the operations (blast furnaces, raw material stores, transport between mine and metallurgy). For the data obtaining have to perform detail analysis and research this individual elements.
The article deals with the methodology of creating the production schedule for wide-strip rolling mill, defining the rules, calculating types and number of campaigns, in the defined planning period, ...filling the campaigns, and campaigns sequence. In model creation is apply the heuristic approach, which is based on experiences of expert in production scheduling in metallurgy. On Induction thinking and analogy are defined heuristics rules. Other rules are defined with the regularities of technology, limitation and optimization criteria. Rules that we do not know resp. we do not want to be modeled we will continue to human expert.
The basic goal of the article is to define changes in production logistics and its essential part of order logistics at the transformation of the production system from an automated management system ...with the participation of first level logistics, managers and machine operators to a fully automated, unattended production system and at the same to define and compare the differences between discrete and continuous-discrete production typical for mining, metallurgical production processes. The solution applied the methodology of comparative analysis of the comparison of current systems of order logistics 1, 2, and its operation in terms of Industry 4.0. There were applied principles of production planning and programming of numerical control (NC) machines and robots and programcontrolled fully automated production processes, especially in the continuous character of processes for the design of a new algorithm of custom logistics 3.
This paper is about an intervention that was initially concerned with physical processes but which required consideration of information flows and culture. The investigation was intended to improve ...the processing strategy and operations of an organization in the East Slovakian Coal Industry. Simulation modelling was used to help the debate, and it helped reveal issues of misunderstanding within the organization and poor communication that led to misallocation of resources. New ways of approaching the process were proposed that would lead to significant reductions in coal waste.
