微波预处理前后萤石浮选的动力学分析

Kinetic Analysis of Fluorite Flotation Before and After Microwave Pretreatment

为阐明微波对萤石浮选的影响机理,研究了微波预处理前后萤石浮选回收率、吸附量的变化规律,并进行不同微波预处理方式下的浮选动力学计算。浮选试验表明:与微波预处理前相比,微波预处理纯矿物、去离子水、加捕收剂的矿浆后,萤石的浮选回收率均有所提高,而微波预处理矿浆,萤石的浮选回收率显著降低。油酸钠吸附量计算结果与萤石浮选回收率的大小顺序一致。而萤石的浮选动力学计算结果发现,微波预处理前后,萤石浮选动力学均符合一级动力学模型。微波预处理萤石纯矿物、去离子水、加捕收剂的矿浆不仅提高了萤石的浮选回收率,还加快了浮选速率,而微波处理矿浆则降低了萤石的浮选回收率和浮选速率。

In order to clarify the influence mechanism of microwave on the flotation of fluorite,this paper studied the change rule of fluorite flotation recovery rate and adsorption capacity before and after microwave pretreatment,and carried out the calculation of flotation kinetics under different microwave pretreatment methods.The flotation test results show that the flotation recovery rate of fluorite is improved after microwave pretreatment of pure minerals,deionized water,and ore slurry with collectors,compared with that before microwave pretreatment,while microwave pretreatment of ore slurry,the flotation recovery rate of fluorite is significantly reduced.The calculation result of sodium oleate adsorption is consistent with the order of the recovery rate of fluorite flotation.The calculation results of fluorite flotation kinetics found that before and after microwave pretreatment,the fluorite flotation kinetics accorded with the first-order kinetic model.Microwave pretreatment of fluorite pure mineral,deionized water,and collector slurry not only improves the flotation recovery rate of fluorite,but also speeds up the flotation rate,while microwave treatment of the slurry reduces the flotation recovery rate of fluorite and flotation rate.