江西某金矿伴生伊利石选矿试验研究

为实现低品位伊利石矿开发利用，以江西某金矿伴生伊利石矿为研究对象，利用XRD、SEM、粒度检测等手段对其物化特性进行表征，通过湿法分级提纯、磁选、漂白等多工艺组合，探索合理的选矿工艺流程。结果表明，原矿系伊利石/高岭石共生和石英矿物伴生的高硅铁低铝砂型伊利石矿，伊利石和石英呈片状和粒状分布，且具有不规则性; 铁含量高且不易除去，对精矿产率影响较大; 经湿法分级提纯、磁选、漂白等多工艺组合提纯所得伊利石粒径2~5 μm，白度80.7%，Al₂O₃品位由2.03%提高至28.81%，能满足陶瓷、橡塑等领域应用要求。

Experimental Study on Beneficiation of Associated Illite in Gold Ore from Jiangxi

In order to realize the exploration and utilization of low-grade illite ore, XRD, SEM and particle size distribution were introduced to characterize the physicochemical properties of the illite associated in a gold ore from Jiangxi Province. A proper processing flowsheet was proposed based on an experimental study on the combination of wet classification and purification, magnetic separation and bleaching. The results show that the raw ore belongs to a high-silicon-iron and low-aluminum arenaceous illite ore with intergrown illite/kaolinite and associated quartz gauge minerals. Illite and quartz are distributed irregularly in flake and granular shapes. And the factors of high content of iron and the difficulty in iron removal bring remarkable impact to the illite yield. It is shown that the illite concentrated by the combined processes has a particle size in the range of 2~5 μm, a whiteness of 80.7%, and the Al₂O₃ grade is increased from 2.03% to 28.81%. This product is qualified to be used as the raw material for ceramic, rubber and plastics industries.