Prediction of the consumption of raw materials and fuels for the blast furnace

This article was conducted within the framework of project reg. no. CZ.11.4.120/0.0/0.0/ 16_013/0002594, programme, Interreg V-A Czech Republic-Poland, Microprojects Fund 2014–2020 in the Euroregion Silesia. It is focused in the area of modelling technological processes and the presentation of the main principles of these models. The modelling of technological processes is important in terms of its applicability to process prediction in industry. A complex of analytical and predictive metallurgical models was developed within VSB-TUO. The original mathematical model of coke degradation in a blast furnace makes it possible to calculate the minimum consumption of coke from the dynamic balance for different values of the ratio of direct and indirect reduction. As part of the graphic output, it determines the practically and theoretically achievable minimum coke consumption points. The use of the model enables the determination of a real reserve in reducing the amount of coke.Web of Science111art. no. 7

Selected elements of raw materials management in blast furnace department of steelworks

Produkcja surówki wielkopiecowej wymaga ogromnej ilości surowców i materiałów do produkcji. Ciągłość pracy wielkiego pieca powoduje, że nie mogą wystąpić sytuacje braku surowców w magazynie. Celem artykułu jest charakterystyka problemu gospodarki surowcowej w wybranym Wydziale Wielkopiecowym jednej z polskich hut. Artykuł ten dotyczy tylko jednego rodzaju surowców, tj. rud żelaza. W pierwszej części dokonano analizy wielkości i struktury dostaw surowców do zakładu. W drugiej jego części oceniono wielkość produkcji surówki i jednostkowe zapotrzebowanie na poszczególne surowce i materiały. W ostatniej części dokonano próby prognozy produkcji i zapotrzebowania na rudy. W analizie uwzględniono wyniki zebrane w analizowanym Wydziale Wielkopiecowym i obejmujące 1 rok kalendarzowy.The production of pig iron requires a huge amount of raw materials and materials for production. The continuous operation of blast furnace means that there cannot be situation of lack of raw materials in the warehouse. The main purpose of the paper is the characteristics of problem of raw materials management in the selected Blast Furnace Department in one of Polish steelworks. This paper applies only to one type of raw materials: iron ores. In the first part the analysis of volume and structure of raw materials supply to the plant is presented. In the second part, the volumes of pig iron production and unit demand for individual raw materials and materials were assessed. In the last part of the paper, the attempt of forecasting of production and demand for iron ores was made. The analysis takes into account the results collected in the analyzed Blast Furnace Department and covers the period of 1 calendar year

The assessment of quality of products using selected quality instruments

The quality parameters of products should be controlled at every stage of the production process, since it allows detection of any problems even in the initial stages of production processes and removes their causes during manufacturing. Final control of products is intended to capture non-conforming products that did not go to the customers. The results of such controls should constantly be analysed. Such analysis can help to detect the most common problems, determine some dependences or identify the causes of such situations. A lot of different instruments that can support improvement of processes can be used for this kind of analysis. The paper presents the possibility of using some tools which can be utilized to support the analysis and assessment of quality of products at different stages of the production process. The quality analysis of exemplary products using selected quality methods and tolls is carried out. Metal sleeve, that is part of electronic control subassembly of anti-blocking system of ABS, which was the research component being studied

The analysis of non-conformances as the way of assessment of quality of aluminium finishing strips in the selected company

The main purpose of the paper is the analysis of nonconformances of aluminium finishing strips in one of Polish companies. This kind of analysis may be one of the ways to assess the quality of products. In the first part of the paper qualitative analysis of nonconformances of strips was made using the Pareto chart, where 6 types of non-conformances were taken into account. In the second part of the paper the causes and effects of non-conformances of strips were assessed using FMEA method. This method showed that the biggest problem concerned the anodised coating of strips. In the last part of the paper the in-depth analysis of the causes of appearance of defects if anodising process using Ishikawa chart was made. All causes were discussed. The analysis takes into account the results collected in the company producing various types of strips. The analysis covers the period of two calendar years

Quality Analysis of Pig Iron Produced in One of Polish Steelworks

score: 0collation: 2146-215

Quality of coke used in blast furnace process - analysis of selected parameters

The basic economic goal of pig iron process is to produce a finished product at the highest possible quality and at the lowest possible cost. The quality of pig iron depends on the quality of raw materials used in the process, quality of fuels and process parameters. The cost of fuel is one of the basic component of cost of pig iron production. Therefore, consumption of fuels should be minimized while maintaining its high quality. The main technological fuel of this process is blast furnace coke. Very often, cheaper alternative kinds of fuels are used in the form of finer sorts of coke or alternative fuels (e.g. coal dust). However, they can be used only in a limited amount. The aim of the paper is the assessment of the selected quality parameters of stabilized coke used in the blast furnace process and the comparison of their values with requirements

Analysis of Selected Aspects of Knowledge Management in the Context of Their Impact on the Quality Level in Metallurgical Enterprises

The review of definitions allows to state that knowledge management in enterprises is a complex, multi-aspect process requiring the implementation of a number of interrelated mechanisms and instruments. Sharing knowledge can increase employee productivity, team performance and the ability to transform diversity into creativity and organizational innovation. Sharing of knowledge in the enterprise should be implemented both in a formal and informal way and be supported by appropriate communication mechanisms, employee exchange programs, job rotation, mentoring relations, techniques Only a well-constructed, implemented and modified system can ensure achieving the intended goals related, among other things, to ensuring the proper functioning of quality assurance mechanisms. and tools for assessing teamwork, a z system promoting creativity and cooperation. The main purpose of the publication is to present the results of research conducted on a sample of 22 enterprises regarding the analysis of the extent of enterprises' use of knowledge and human capital potential to improve the quality management. The research focused mainly on the impact of selected elements of management of knowledge and human capital on the level of employee awareness, as well as the number and type of non-compliance of products. The study used a questionnaire and statistical analysis of data from manufacturing processes

Statistical analysis of quality parameters of pig iron

Steel is currently main structural material in the world. Pig iron, which is the basic product of blast furnace process, is the semi-product used in steel-making processes. It is an alloy of iron with carbon containing above 2% C and other elements with limited content, intended for further processing. Chemical composition of pig iron is its basic quality factor, it defines its class and meeting requirements set by steel plant department. It is important that this chemical composition is as stable as possible. In addition, the temperature of pig iron is also very important quality parameter. The paper presents statistical analysis of quality parameters of pig iron produced in one of Polish steelworks. The content of alloying elements and temperature of tapping of pig iron from blast furnace were examined. The amount of non-conforming production and the losses related to the low quality were assessed

The evaluation of efficiency of the use of machine working time in the industrial company – case study

In the paper the evaluation of efficiency of the use of machines in the selected production company was presented. The OEE method (Overall Equipment Effectiveness) was used for the analysis. The selected company deals with the production of tapered roller bearings. The analysis of effectiveness was done for 17 automatic grinding lines working in the department of grinding rollers. Low level of efficiency of machines was affected by problems with the availability of machines and devices. The causes of machine downtime on these lines was also analyzed. Three basic causes of downtime were identified: no kanban card, diamonding, no operator. Ways to improve the use of these machines were suggested. The analysis takes into account the actual results from the production process and covers the period of one calendar year.Web of Science25424524

Ecological and Economic Benefits and Safety of the Use of Coal Gas in Industry

Possibilities Of Use Of Degassing And Carbon Gas In Industry. Degassing Gas Represents A Waste During Coal Mining So Far And This Issue Is Not Effectively Solved In Ostrava Region Up Till Now Ecological Aspects, Safety, Economic Aspects. Coal Deposits Represent A Special Case In Which The Deposit Is Both A Source Of Coal And Reservoir Of Gas. For The Thing Is That, In The Process Of Coalification Of Plant Residue, Coal Bed Gas Came Into Being Of Which The Main Component Is Methane. Gas From Mining Degassing Can Be Used As A Substitute Fuel For The Blowing Of Blast Furnaces. This Would Not Only Make It Possible To Reduce The Specific Consumption Of Coke, But Also Contribute To A Better Blast Furnace. An Economic Effect Is Also Negligible If We Characterize Degassing Gas As Waste Gas