摘要
为探究不同白钨矿捕收剂对环境温度的响应差异和机制.采用单矿物浮选试验,系统研究了油酸钠和3种羟肟酸浮选白钨矿的温度响应规律,并通过接触角试验、表面张力测量、流变学研究、浊度试验、Zeta电位测试以及吸附量试验,揭示了温度对捕收剂性能影响的内在机制.结果表明:随着浮选温度的降低,所有捕收剂的捕收能力均有所减弱,其中油酸钠受温度影响更为显著.温度降低导致捕收剂表面张力增加、矿浆黏度增大、药剂溶解性变差.这些因素共同作用,使得捕收剂分子与矿粒的碰撞概率下降,药剂在矿粒表面的吸附量减少,最终导致作用于白钨矿颗粒表面的药剂分子数量减少,降低了矿粒表面的疏水性,严重恶化了浮选效果.
To investigate the differences and mechanisms of the response of different scheelite collectors to temperature.The temperature response law of sodium oleate and three kinds of hydroxamic acid flotation of scheelite was systematically investigated by using single-mineral flotation tests,and the intrinsic mechanism of the influence of temperature on the performance of the collectors was revealed by the contact angle tests,surface tension measurements,rheological study,turbidity tests,Zeta potential tests,and adsorption tests.The results show that with the decrease of flotation temperature,the capture capacity of all the collectors is significantly weakened,among which sodium oleate is more significantly affected by temperature.The decrease in temperature leads to an increase in the surface tension of the collector,an increase in the viscosity of the slurry,and a deterioration in the solubility of the reagent.The combined effect of the above factors makes the collision probability between the collector molecules and the ore particles decrease,and the adsorption amount of the reagent on the surface of the ore particles decreases,which ultimately leads to a decrease in the number of reagent molecules acting on the surface of scheelite particles,reduces the hydrophobicity of the surface of the ore particles,and seriously deteriorates the flotation effect.
作者
卜显忠
王亮
薛季玮
张崇辉
王森
宛鹤
BU Xianzhong;WANG Liang;XUE Jiwei;ZHANG Chonghui;WANG Sen;WAN He(School of Resources Engineering,Xi′an University of Architecture and Technology,Xi'an,Shaanxi 710055,China)
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2024年第2期390-398,共9页
Journal of China University of Mining & Technology
基金
国家自然科学基金项目(52074206)
陕西省重点研发计划国际合作项目-重点项目(2021KWZ-16)。
关键词
低温浮选
白钨矿
羟肟酸
粉末接触角
low temperature flotation
scheelite
hydroxamic acid
powder contact angle
