基于图像处理技术的赤铁矿絮凝体-气泡矿化过程研究  

Study on the Process of Hematite Floc-bubble Mineralization Based on Image Processing Technology

作　　者：牛福生 陈雨盈 张晋霞 于晓东 朱笑磊 NIU Fusheng;CHEN Yuying;ZHANG Jinxia;YU Xiaodong;ZHU Xiaolei(School of Mining Engineering,North China University of Science and Technology,Tangshan 063210,China)

机构地区：[1]华北理工大学矿业工程学院,河北唐山063210

出　　处：《金属矿山》2021年第12期68-74,共7页Metal Mine

基　　金：国家自然科学基金项目(编号:51874135)。

摘　　要：为了探究赤铁矿絮凝体-气泡的矿化过程,在自制的观察装置中,以静止气泡为研究对象,通过高速相机记录赤铁矿絮凝体在气泡表面的运动状态,得到赤铁矿絮凝体-气泡矿化过程。结果表明:气泡直径不变的条件下,赤铁矿絮凝体粒径为39.65μm时,絮凝体最先滑动至最大横向位置和最小纵向位置,瞬时滑动速度变化范围小;赤铁矿絮凝体粒径不变的条件下,气泡直径为636.16μm时,絮凝体滑动至最大横向位置和最小纵向位置的时间最长,瞬时滑动速度变化范围大;絮凝体粒径和气泡直径不变的条件下,碰撞角度大于60°时,絮凝体易从气泡表面脱附。利用高速摄像仪探究并分析了絮凝体-气泡矿化规律,为指导絮凝浮选实践应用提供理论支撑。Aiming at the microscopic process of fine-grained hematite flotation,in a self-built observation device,with static bubbles as the research object,the motion state of hematite flocculation on the bubble surface was recorded by highspeed camera to obtained hematite floc-bubble mineralization process.The results showed that when the particle size of hematite floc was 39.65μm under the condition that the diameter of the bubbles was unchanged,the flocculation first slid to the maximum lateral position and the minimum longitudinal distance,and the smaller the change range of instantaneous sliding speed;Under the condition of constant diameter,when the diameter of the bubble is 636.16μm,the flocculation body finally slides to the maximum lateral position and the minimum longitudinal position,and the momentary sliding speed change range is smaller;The floc particle size and bubble diameter remain unchanged,when the collision angle is greater than 60°,floc is easily desorbed from the bubble surface.The process of flocculation-bubble mineralization is recorded and analyzed by high-speed camera,which lays a foundation for further improving the efficiency of fine-grain flocculation flotation.

关 键 词：絮凝体 气泡 矿化过程 图像处理 

分 类 号：TD923[矿业工程—选矿]