摘要
为了研究十二胺、十四胺、十六胺与癸醚胺中不同的分子结构对泡沫浮选性能的影响,借助高速摄像机等检测设备,对气-液两相体系下气泡大小,气-液-固三相体系下捕收剂的起泡性、单位体积泡沫带矿量和泡沫水回收率等参数进行测量。结果表明:①在15℃、pH=6.0及药剂用量低于临界兼并浓度的条件下,达到临界兼并浓度时气泡索特直径由小到大依次为:十二胺<癸醚胺<十四胺<十六胺;②随药剂用量的增加,十二胺、十四胺、癸醚胺与石英作用后产生的泡沫体积先增大后减小,十六胺产生的泡沫体积随药剂用量的增加而减小;③十二胺的单位体积泡沫带矿量几乎不随药剂用量的改变而改变,十四胺、十六胺、癸醚胺单位体积泡沫带矿量呈先增加后下降的趋势,其中十六胺的变化速率最快,明显高于十二胺和十四胺;④随着药剂用量的增加,十二胺、十四胺、十六胺与石英矿物颗粒形成的泡沫水回收率逐渐增加,癸醚胺逐渐下降。⑤碰撞几率Pc随气泡索特直径的减小而增加,减小气泡直径是增加浮选回收率的有效手段,但泡沫水回收率随之增加,使得脉石夹带现象严重。
In order to study the effect of molecular structure of dodecylamine,tetradecylamine,hexadecylamine anddecyl ether amine on the flotation properties of foam,the bubble size in gas-liquid two phase system,and the foamability ofthe collectors,the amount of ore in unit volume of foam and recovery rate of foam water in gas-liquid-solid three phase sys-tem were studied with the aid of high-speed cameras and other testing equipment. The results indicated that:(1) In the condi-tion of the temperature of 15 ℃,pH value of 6.0 and the concentration below the critical coalescence concentration,the sau-ter diameter size of the bubble when the critical coalescence concentration was reached is in the following order: dodecylam-ine < decyl ether amine < tetradecylamine < hexadecylamine.(2) With the increase of reagents dosage,the foam volume ofdodecylamine,tetradecylamine and decyl ether amine after the action with quartz increased first and then decreased,whilethe foam volume of hexadecylamine decreased.(3) The amount of ore in unit volume of foam for dodecylamine almost does notchange with the increase of the dosage of reagents. While the amount of ore in unit volume of foam for tetradecylamine,hexa-decylamine and decyl ether amine increase first and then decrease,among which the change rate of hexadecylamine is thefastest,obviously higher than that of dodecylamine and tetradecylamine.(4) With the increase of the reagents dosage,recov-ery rate of foam water after the action with quartz of dodecylamine,tetradecylamine and hexadecylamine increased gradual-ly,while the recovery rate of foam water of decyl ether amine decreased gradually.(5) The collision probability Pcincreaseswith the decrease of the sauter diameter. Reducing the bubble diameter is an effective means to increase the flotation recoveryrate,but the recovery of foam water increases,which made the gangue entrainment phenomenon serious.
作者
朱一民
杨雪莹
乘舟越洋
高子蕙
韩跃新
Zhu Yimin;Yang Xueying;Cheng Zhouyueyang;Gao Zihui;Han Yuexin(School of Resources and Civil Engineering,Northeastern University,Shenyang 110004,China;2011 Iron and Steel Ge-neric Technology Innovation Center of Northeastern University,Shenyang 110004,China;Technical Engineering Laborato-ry of High Efficient Exploitation and Utilization of Refractory Iron Ore in Liaoning,Shenyang 110004,China)
出处
《金属矿山》
CAS
北大核心
2020年第7期99-104,共6页
Metal Mine
关键词
胺类捕收剂
气泡大小
泡沫性能
机理
Amine collectors
Bubble size
Foam properties
Mechanism
作者简介
朱一民(1964-),女,教授,博士,博士研究生导师。
