(中南大學(xué) 資源加工與生物工程學(xué)院，長(zhǎng)沙 410083)
摘 要: 顆粒與氣泡間的相互作用對(duì)浮選過(guò)程有著至關(guān)重要的作用，二者能否發(fā)生有效黏附是決定浮選效率高低的關(guān)鍵。高速攝影技術(shù)能直接觀察氣泡-顆粒相互作用微觀動(dòng)態(tài)過(guò)程，具有可視化、直接化等優(yōu)點(diǎn)，在顆粒-氣泡碰撞、黏附、三相接觸線(TPC)形成、脫附等方面應(yīng)用廣泛。本文總結(jié)了基于高速攝影技術(shù)探究顆粒-氣泡相互作用的研究進(jìn)展，顆粒與氣泡間碰撞黏附過(guò)程研究主要采用顆粒沉降法，TPC的形成過(guò)程研究主要采用單氣泡上升法，顆粒的脫附過(guò)程及黏附力的研究則主要采用單氣泡驅(qū)動(dòng)法。這些研究結(jié)果表明，顆粒的形狀和粗糙度、氣泡的大小和運(yùn)動(dòng)速度、表面活性劑濃度和類(lèi)型、礦物疏水性等因素均會(huì)對(duì)顆粒-氣泡間的碰撞-黏附-脫附過(guò)程產(chǎn)生重要影響。
關(guān)鍵字: 碰撞黏附；三相接觸線；礦物顆粒；氣泡；高速攝影技術(shù)
（School of Resource Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:The interaction between particles and bubbles plays an important role in the flotation process, and whether effective adhesion or not is the key to determining the flotation efficiency. High-speed photography technology can directly observe the bubble-particle interaction dynamical microscopic process, which has a wide application in particle-bubble collision, adhesion, and three-phase contact line (TPC) formation, desorption and etc. This paper mainly summarizes the research progress of particle-bubble interaction based on high-speed photography technology. The particle-bubble collision and adhesion process are observed by the particle sedimentation method, and the TPC formation process is researched by the single bubble rise method, and the particle desorption process and adhesion force are found by the single-bubble driving method. These research results suggest that the shape and roughness of the particles, the size and movement speed of the bubbles, the concentration and type of surfactants, and the hydrophobicity of minerals would all have an important impact on the process of collision, adhesion and desorption between particle and bubble.
Key words: collision and adhesion; three-phase contact line; mineral particles; bubbles; high-speed photography
