磁化油酸钠溶液对气泡特性影响研究  

Study on the Effect of Magnetized Sodium Oleate Solution on Bubble Characteristics

作　　者：李凤久 王仁贺 贾清梅 叶杨海 孟克难 徐彬 LI Fengjiu;WANG Renhe;JIA Qingmei;YE Yanghai;MENG Kenan;XU Bin(School of Mining Engineering,North China University of Science and Technology,Tangshan 063210,China;Hebei Mining Development and Safety Technology Laboratory,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 [2]河北省矿业开发与安全技术重点试验室,河北唐山063210

出　　处：《金属矿山》2023年第4期79-85,共7页Metal Mine

基　　金：河北省自然科学基金项目(编号:E2022209123);河北省中央引导地方科技发展资金项目(编号:226Z4102G)。

摘　　要：为了探究磁化药剂在浮选过程中对气泡特性的影响,在自行设计的底吹气泡水槽中,以底部产生的气泡为研究对象,通过高速摄影仪获取不同磁化处理条件下产生的气泡图像,经一系列处理后获得二值化图像,通过对气泡分类得到单气泡和粘连气泡,设置圆形度阈值筛选出符合实际的气泡,并提取气泡面积、直径和周长等参数。研究结果表明,对油酸钠的磁化处理可以改变气泡的尺寸分布、气泡形状及上升速度。在磁感应强度为150 m T时,气泡直径集中分布在0~1 mm区间,并且Sauter直径由0.71 mm降低为0.65 mm。圆形度C和变形系数E接近1,气泡更加接近规则的球型,气泡上升过程中形变量小,气泡更不易变形。对上升气泡的速度分析,磁化后气泡平均速度增大并具有离散性。In order to explore the influence of magnetization agent on the characteristics of bubbles during flotation,in the self-designed bottom blowing bubble tank,the bubbles generated at the bottom were taken as the research object,and the bubbles generated under different magnetization treatment conditions were obtained by high-speed camera Bubble image,after a series of image processing,binary image is obtained,single bubble and adhesion bubble are obtained by classifying bubbles,the circularity threshold is set to screen out the actual bubbles,and the bubble area,diameter,perimeter and other parameters are extracted.The results show that the magnetization of sodium can change the size distribution,shape and rising speed of bubbles.When the magnetic induction intensity is 150 mT,the bubble diameter is concentrated in the 0~1 mm range,and the Sauter diameter is reduced from 0.71 mm to 0.65 mm.The circularity C and deformation coefficient E are close to 1,the bubble is closer to the regular spherical shape,the deformation variable is small during the bubble rising,and the bubble is less likely to deform.For the velocity analysis of rising bubbles,the instantaneous velocity of the bubbles after magnetization is more discrete.

关 键 词：图像处理 磁化处理 气泡直径分布 变形系数 

分 类 号：TD923[矿业工程—选矿]