The 10 MOST VALUABLE Diamond Mines in the World (by Reserves)
Diamond mining is one of the most prestigious and profitable industries in the world. The ten largest diamond mines in the world by measurable reserves contain more than one billion carats of recoverable diamonds, and this naturally translates into many billions of dollars. It’s thus intriguing to look at how these carats are distributed. 10. […]
Kaolin Tailings Ponds
Kaolin tailings ponds play an important role in reclamation of land and water. Discharges impounded from kaolin plants include oversize fractions consisting of coarse kaolin, mica, quartz as well as magnetically extracted contaminents, acid filtrates, and plant washdown streams. Tailing ponds perform an essential function in sedimentation of particulates, blending and reoxygenation of liquid waste, […]
Indirect Drying Filter Cake
The Thermal Disc is the only transport type dryer which can handle flotation, thickener underflow and pond recovery feed streams without the addition of a coarse fraction. The principle of operation differs from all other types of indirect dryers in that it is a volumetric displacement apparatus rather than first in first out. An operating […]
In Pit Crushing and Conveying Systems
Belt conveyor systems, long the standard transportation technique in soft-rock open-pit applications, are encountering growing interest in the hard-rock open-pit sector as economic factors force companies to seek an alternative to costly truck haulage. A general review of mine conveyor systems is followed by detailed analysis of the mobile and semi-mobile in-pit crushing plant essential […]
Horizontal Cycloning
The invention is based on the discovery that the reason why big hydrocyclones which are positioned vertical need a comparatively high feed pressure is that, owing to their great length, these hydrocyclones contain such a tall liquid column that gravity becomes an important factor and influences the operation of the hydrocyclone. If however, the hydrocyclone […]
Compare High Frequency Screens & Hydrocyclones
Hydrocyclones are currently the most commonly used classifiers in wet closed circuit grinding systems. Some recent papers, however, give evidence that high frequency vibrating screens can be a viable alternative to hydrocyclones for a wide variety of grinding applications. In principle, classifier selection for closed circuit grinding should be based on an evaluation of the […]
High Efficiency Separator
The industrial grinding process has undergone changes to better address the market and economic needs. Fine grinding of dry materials has developed to the point where classifying linings and fine ball charges improve mill efficiencies. Roller mills as well have wide acceptance due to their power efficiencies. The mill, by its nature, cannot provide the […]
Staged Classification & Grinding Circuits
Minerals beneficiation commonly requires initial crushing and grinding so that the mineral phase we seek to concentrate is adequately liberated to obtain a product of specified grade at optimum recovery. To some degree this also is true for coal preparation. In the comminution process we liberate not only the product but also the tailings phase. […]
Grinding Circuit Audit
The Island Copper concentrator was designed to process 30,000 t/d of copper ore containing 0.52% Cu and 0.017% Mo with payable gold, silver, and rhenium values. Separate copper and molybdenum flotation concentrates are produced and currently sold to customers in Asia, Europe and the North America. The comminution circuit as originally installed comprised single stage […]
Particle Size and Selectivity of Sulfide Flotation
A very important factor in froth flotation is the use of surface-active chemicals to form a froth in which minerals or coals are retained, thus allowing for valuable component enrichment. Despite the importance of frothers, surprisingly little systematic scientific work has been performed with the goal of quantifying frother mechanisms and the influence of particle […]