Development Of Laboratory Thickener With Torque Detection And Research On Torque Mathematical Model

The thickener is a solid-liquid separation equipment based on gravity sedimentation.The torque design of the thickener is one of the key factors in the design of the thickener.The torque is produced by the rake frame overcoming the yield stress and shear stress of the slurry when it is rotating.The torque design of the thickener will directly affect the efficient dehydration effect of the thickener,even the safe operation of the thickener and the production stability of the whole concentrator.It is very important for us to find key parameters which affect the torque of thickener.Therefore,there is certain theoretical significance and important engineering application value in reasonable torque design of the thickener.The purpose of this paper is to design and manufacture a small-scale thickener system in the laboratory.According to the general thickener model,a small-scale equipment with multiple adjustable parameters is designed to simulate the continuous settlement state of the bottom compression area of the thickener.The influence of multiple factors on the thickening effect of the thickener is visually detected.The factors such as concentration,rake tooth form,mud layer height,rake speed and so on are mainly investigated The results show that: the results of variance analysis show that the correlation between concentration and torque is the highest,followed by scraper height,scraper angle and scraper speed;the torque is positively correlated with concentration,scraper height,mud layer height and rake frame speed,and negatively correlated with scraper angle.Through yield stress analysis and theoretical derivation,the mathematical model between torque and the above-mentioned relevant parameters is established.The research results of this paper can provide reference and relevant basis for the torque design and parameter optimization of thickener.