细粒菱铁矿、石英和赤铁矿吸附团聚的机理

Mechanism of Adsorption and Aggregation of Fine Siderite,Quartz and Hematite

含菱铁矿难选铁矿石在磨矿作业过程中,菱铁矿极易泥化,并大量吸附在脉石和有用矿物的表面上,恶化了后续选别作业.为了查明微细粒菱铁矿、石英和赤铁矿在矿浆中吸附团聚的本质及规律,利用DLVO理论探讨了微细粒菱铁矿与粗粒石英、微细粒菱铁矿与赤铁矿及细粒菱铁矿之间的作用机理.计算结果表明:微细粒菱铁矿容易吸附罩盖在粗粒石英和赤铁矿表面,微细粒菱铁矿和微细粒赤铁矿相互作用发生团聚现象,而微细粒菱铁矿之间不发生吸附团聚现象.

In the grinding process of refractory iron ore containing siderite,the siderite is very easy to be slimed. A large number of fine siderite particles were adsorbed on the surface of gangue and useful minerals,which seriously deteriorates the following processing. In order to find out the essence and rules of adsorption and aggregation among the fine siderite,quartz and hematite in pulp,DLVO theory was applied to study the interaction mechanism between the fine siderite particle and the coarse quartz particle,the fine siderite particle and hematite particle,the fine siderite particles,etc. The calculating results showed that the fine siderite particles are easily adsorbed on the surface of coarse quartz particles and hematite particles. The agglomeration phenomenon occurs between fine siderite particles and fine hematite particles,and doesn＇t occur between the fine siderite particles.