Efficient filtration of fine kaolin particles plays a crucial role in processing of raw kaolin to a marketable product. Oftentimes, filtration is the rate controlling
Aqueous pressure oxidation at low temperature, although desirable from a process engineering and operations point of view, presents unique problems when temperatures approach 160°C (320°F).
Roasting of refractory gold ores has the primary goal of oxidizing sulfides and organics to improve gold recoveries prior to leaching. Commercial installations currently utilize
Table of ContentsRefractory Ore TypesRefractory Ore Pretreatment ProcessesRanking studiesProcess Selection Process Gold in primary deposits is generally recovered by dissolution in dilute cyanide solution followed
Increased recycling of waste paper has been emphasized in recent years in both the USA and Canada for environmental and economic reasons. Removal of ink
hile particle size is universally acknowledged to be important in optimizing industrial copper sulfide rougher flotation circuits, many of the various interactions that do occur
Table of ContentsPressure Leaching and BrominationPretreatment of CCD Pulp and Subsequent Bromination LeachingOther Lixiviants The interest in using halogens for extracting precious metals from ores
Table of ContentsTheoretical BackgroundExperimentalResults and Discussion The dissolution behavior of silver and copper from silver/copper alloys in ammoniacal solutions has been investigated using a rotating
Table of ContentsExperimental SetupStatistical Design MethodologyResults of Design AnalysisRate Constant ModelsEvaluation of Rate Constant ModelsDevelopment of the Arrhenius Activation Energy FunctionAcidity and Iron HydrolysisConclusions Hydrometallurgical
Kaolin is a clay comprised essentially of the mineral kaolinite which has the oxide composition of 46.3% SiO2, 39.8% Al2O3, and 13.9% combined H2O. The