Offset Detection of Grate Trolley’s Side Plate Based on YOLOv4

Side plate offset is one of the grate system faults. If it is not dealt with in time, some accidents will occur and economic losses will be made. Aiming at the problems like time-consuming, labour-wasting, and low intelligent by the side plate offset detection method manually, an autoside plate offset detection method is proposed, based on You Only Look Once version 4 (YOLOv4). Two cameras were fixed to collect the image information of the grate trolley’s side plate. With reference to the grate trolley’s operation, the offset judgment rules were set. YOLOv4 object detection algorithm was used to detect the side plate and trolley’s chassis frame in video frame images. A baseline was set according to the position information of the trolley’s chassis frame output by detection, and then, the position intervals between side plates and the baseline could be determined by calculation. According to the judgment rules, the scheme in this paper could detect the offset fault of the trolley’s side plate timely, and an alarm would be made automatically when faults are detected. Our video images of the trolley’s side plate were collected and sorted in Baogang Group sintering plant for testing. In this experiment, no error judgment was made, and the average detection and judgment time was 0.024 s. In this paper, rather than manually, the real-time automatic detection was realized to detect the offset fault of the trolley’s side plate so as to provide a new solution for offset detection of the grate trolley’s side plate.

Main stages of the technology and equipment perfection at JSC EVRAZ ZSMK sintering plant

Data on sintering plant of OJSC EVRAZ ZSMK, its structure, stages of construction, main designing solutions, operation indices and structural changes presented. Main directions of technology and equipment perfection shown. From the moment of the sintering plant putting into operation, it operated by the designed plan, which met the existing in early 70th of the former century requirements of fluxed sinter production technology. Later the flowchart, technology and the aggregates subjected to considerable modifications. The main efforts of researchers and the plant personal developments directed on the study of the burden components and obtained sinter properties, elaboration of a technology of new kinds of raw materials sintering, optimization of main parameters of the sintering process technological regime, external heating and the burden components preparation. Besides new technological units and equipment implemented and their operation modes mastered, as well as that of process intensification. In addition, the plant personal paid much attention to the sinter quality and technical and economic indices improving, to ecology and wastes utilization, as well as elaboration of a technology of special kinds of sinter production after BF No. 2 stop and some capacity releasing. At present, the two-layer burden sintering technology mastered at all the sintering machines with the layer height500 mm. The work on modernization of the main and auxiliary plant equipment accomplished continuously. Automated control systems widely used at the plant to control the following: the quality of the incoming raw materials, supply and consumption of raw materials, calculation of the stacks, concentrate liming, the burden components and fuel dozing, the burden moistening, the burden preparation and sintering, the plant running, sinter and energy carriers accounting as well as information and technological circuit. At present, a big volume of work planned, directed on polluting substances emissions lowering, volume of production increasing and sinter quality improving, as well as production and operation costs decreasing.