论文部分内容阅读
通过流体力学理论和数值计算方法,研究了Falcon离心分选机内流膜运动特性,建立了反冲水孔与反冲水初始流速的关系模型.利用离心分选流体计算理论,建立了Falcon分选机分层区与分选区的流膜厚度计算模型,并分别利用反冲水作用下矿粒极限脉动高度和流膜表面波理论确定了流膜分选下限的计算方法,并进行实验验证.研究结果表明:分层区流膜厚度与给料速度成正比,与离心机转速、流膜高度位置成反比;分选区流膜厚度与反冲水压成正比,与转速成反比.Falcon离心分选的分选下限受到颗粒极限脉动高度和表面波的双重限制,分选下限与流膜厚度成正比,与分选的矿物密度成反比.
Based on the theory of fluid mechanics and numerical calculation, the movement characteristics of inner flow membrane in Falcon centrifugal separator were studied, and the relation model between the backflush water hole and the initial flow velocity of backwash water was established.Using the centrifugal separation fluid calculation theory, In this paper, the calculation model of the film thickness in the stratified area and the sorting area is selected. The calculation method of the lower limit of the flow film is determined by the maximum pulsation height of the ore particles and the surface wave theory of the film. The results show that the thickness of the fluidized film in the stratified zone is proportional to the feed rate and inversely proportional to the rotational speed of the centrifuge and the height of the fluid film. The thickness of the fluid film in the separating zone is proportional to the backwashing pressure and inversely proportional to the rotational speed. The selected lower limit of separation by the particle limit pulse height and surface waves of the dual constraints, the lower limit of the separation is proportional to the thickness of the flow film, and the density of mineral sorting is inversely proportional.