DEVELOPMENT OF A SYSTEM FOR AUTOMATED CONTROL OF THE BRICK FIRING PROCESS IN A RING FURNACE

В данной статье приводится описание технологического процесса обжига керамического кирпича в кольцевой печи Гофмана. Проанализирован существующий уровень автоматизации объекта. Приведено обоснование для внедрения автоматизированной системы управления процессом обжига кирпича и вариант структурной схемы системы автоматизированного управления. Также представлены основные характеристики интегрированной среды разработки SIMPLE-SCADA, выбранной для организации операторского уровня автоматизированной системы управления технологическим процессом. Для определения показателей качества системы определены прямые и косвенные оценки качества функционирования системы управления. This article describes the technological process of firing ceramic bricks in a ring Hoffmann furnace. The existing level of object automation is analyzed. The justification for the introduction of an automated control system for the brick firing process and a variant of the block diagram of the automated control system is given. The main characteristics of the integrated development environment SIMPLE-SCADA, selected for the organization of the operator level of the automated process control system, are also presented. To determine the quality indicators of the system, direct and indirect assessments of the quality of the management system are determined.

Study on Thermal Operation and Design of Ring Furnace of the Pipe Rolling Plant

High productivity of rolling and pipe rolling mills, good quality of finished metal products is possible to provide in the presence of powerful heating furnaces, well heating the metal with minimal oxidation and decarburization. Such conditions are provided by ring furnaces which are widely used for heating the preparations at rolling of pipes, wheels and bands of the railway rolling stock. The purpose of the heat – receiving structure of the metal, providing a set of physical and working properties, or impart to these materials the ductility required for subsequent machining. The article deals with the design and thermal performance of the ring furnace operating at ChelPipe’s Pipe Rolling Plant No.2. The problems arising during the operation of the thermal unit are analyzed. The paper describes the calculation of heating of metal and heat balance of the ring furnace. In the course of the analysis of the results of design studies, the shortcomings of the existing heat recovery system are revealed and measures for the reconstruction of the furnace to reduce fuel consumption and increase productivity (replacement of the existing brick lining with fibrous, the use of regenerative burners, the use of non-water-cooled partitions, etc.) are proposed. The paper analyzes the design and thermal performance of the ring furnace for heating of pipe billets before rolling. It shows a heat balance of the ring heating furnace and provides measures for furnace reconstruction aimed at reduction in fuel consumption and increase in efficiency: replacement of the existing lining with fiber lining, use of regenerative burners, application of non-water cooled walls.