论文部分内容阅读
浮选泡沫的结构和运动决定着被夹带捕集到精矿中的脉石数量。尽管这一现象对总的工艺指标起着重要的作用 ,但现阶段对泡沫的性状仍然了解得不够。至今为止 ,已建立出的多数用以说明夹带过程的模型都是经验模型。本文介绍了一种有重要参考意义的理论模型 ,并试图利用这一模型更好地了解夹带现象。这种通用的泡沫模拟器 (UMISTFroth Sim)可以模拟很宽范围的浮选条件 ,因为它考虑到了出现在浮选泡沫中的许多物理现象。该模型首先要根据重力、黏滞力和毛细效应描述气体的运动、气泡的兼并和水的运动。根据疏水性、颗粒粒度和密度区分不同固体类型之间的固体运动 ,并建立包括几何普拉特奥边界 (Plateaubordey)的扩散、颗粒沉降和水运动等效应的模型。本文的目的是要证明 ,这一模型在解释试验观测到的脉石矿物的夹带和捕收现象的应用中的可能性。这是通过对比模型预测的脉石回收率和试验观测到的脉石回收率与水回收率之间关系实现的。
The structure and movement of the flotation foam determine the amount of gangue trapped in the concentrate. Although this phenomenon plays an important role in the overall process indicator, the character of the foam is still not well understood at this stage. To date, most of the models that have been established to illustrate the entrainment process are empirical models. This article presents a theoretical model of important reference meaning and attempts to use this model to better understand entrainment. This universal foam simulator (UMISTFroth Sim) simulates a wide range of flotation conditions because it takes into account many of the physical phenomena that occur in flotation foam. The model first describes the movement of gas, the bubble merger and the movement of water according to the gravitational, viscous and capillary effects. Differentiate solid motion between different solid types based on hydrophobicity, particle size and density, and establish a model that includes the effects of diffusion, particle settling, and water movement on the plateaubordey. The purpose of this paper is to demonstrate the feasibility of this model in explaining the application of the observed entrainment and collection of gangue minerals. This is achieved by comparing the predicted recovery rate of gangue with the observed recovery rate of gangue and water recovery.