Sintering Process Ingredient Weighing And Humidity Control System Design And Application

In this paper, with the material proportion and humidity control ofthe sintering process as the study object, through the sliding variablesstructure control technology and Fieldbus technology, we has designedmaterial proportion quantification and humidity control systems, keyprocedures such as mix material proportion and watering are insured forstability and precision.Main content is as follows:First, an analysis of technical process of sintering is made. Wepropose an integrative scheme of multi-on-worksite general circuitproducts and give out the design theory of its structure on the base ofinvestigation of the general circuit on the spot in existence.Second, a control system of the quantification of sintering materialsproportion based on general circuit on the spot is proposed and controlsoftware is designed, resulting in improving accuracy of thequantification of sintering materials proportion, reducing work intensityof operators and realizing autoimmunization of the production process.Besides, a designing approach for the adaptive sliding model on the basisof the theory of the calculus-converted function is illustrated, setting up acontroller of robustness for the measurement of which the strength varieswith the parameters. Compared with the PID controller in the formerproportionate system, it is more accurate in the quantification of materialsproportion and guarantees an adequate sintering of the minerals.Third, we have designed humidity control software for the mixtures,suggested a design for direct modulations on the flow of running water inthe worksite by using a kind of the general assembly line device, which makes use of the sliding model structure to control the humidity of themixtures. This design stabilizes both water in the mixtures and thesintering process, reduces the rate of wastes and improves the quality ofproducts, thus realized an effective control of the major time changesystem in the lagging behind way of the humidity control of the mixtures.The last, the system has been applied in the factory. The result ofreal-time control shows the system has reliable work and accurate controlprecision, which enhance stability and production benefit of sinteringprocess obviously.