Abstract
The recovery of fine wolframite is low when using traditional flotation that does not use a microbubble. In this study, a microbubble was introduced into the fine wolframite flotation system; −20 μm wolframite was used as an experiment sample and octyl hydroxamic acid as the collector. The recovery of microbubble flotation reached 84.07%, which is about 12.04% higher than that of traditional flotation. A single-factor flotation experiment, high-speed camera analysis, and SEM (Scanning Electron Microscopy) analysis were used to study the influence of microbubbles on the flotation of fine wolframite. The results show that fine wolframite will more easily agglomerate under the action of microbubbles. The octyl hydroxamic acid adsorbed on the surface of wolframite treated with microbubbles is denser and more abundant.
Highlights
Xu et al [23] showed in their research that, due to the turbulent kinetic energy of the water flow that will hit the bubbles causing local loss of the water film of the microbubbles, this leads to an imbalance in the internal and external pressure of the microbubbles
In the same concentration of hydroxamic acid, the recovery of microbubble flotation of wolframite is about 15% higher than that of traditional flotation
The introduction of micro-nanobubbles can significantly improve the recovery of fine The introduction of micro-nanobubbles can significantly improve the recovery of fi wolframite flotation
Summary
In view of the coarse disseminated particle size, large specific gravity, and relatively simple composition of wolframite, the main process of separation is gravity separation [1]. In the process of gravity separation, due to the brittle nature of tungsten ore, it is easy to over-grind and produce fine mud; most of the fine mud is embedded with a finer grain size, and there are many useful metal minerals associated with it. Flotation is a commonly used separation method for fine-grain wolframite. The main mechanism of collision is interception [6], and a fine particle size will lead to low collision efficiency, which is not conducive to the contact between mineral particles and air bubbles. Stirring provides energy input for the flotation process, which promotes the collision of bubbles and particles [7]. Materials and Methods instead of traditional flotation to improve the flotation recovery rate of fine wolframite
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