Assaying Cadmium Determination Methods
Cadmium occurs in nature as cadmium sulphide in greenockite, CdS, which is very rare. It is widely diffused in calamine, blende, and other zinc ores, forming, in some cases, as much as 2 or 3 per cent, of the ore. Oxide of cadmium forms the “ brown blaze ” of the zinc smelters. Sulphide of […]
Assaying Zinc Determination Methods
Zinc occurs in nature most commonly as sulphide (blende); it also occurs as carbonate (calamine) and silicate (smithsonite). Each of these is sufficiently abundant to be a source of the metal. The metal is known in commerce as “ spelter ” when in ingots, and as sheet zinc when rolled. It is chiefly used in […]
Assaying Cobalt Determination Methods
Occurs less abundantly than nickel. Its chief ores are smaltite and cobaltite, which are arsenides of cobalt, with more or less iron, nickel, and copper. It also occurs as arseniate in erythrine, and as oxide in asbolan or earthy cobalt, which is essentially a wad carrying cobalt. It is mainly used in the manufacture of […]
Assays for Titanium
Titanium only occurs as a mineral in its oxidised state, or as titanic oxide (TiO2). It is a substance which has little commercial value, and is generally recognised as one of the rare bodies; although, in small quantities, it is widely disseminated. It occurs in granite, basalt, and other igneous rocks in quantities up to […]
Tungsten Assaying
The ammonic carbonate filtrate from the silica is evaporated to dryness, ignited strongly over the blowpipe, and weighed. The residue is tungstic acid, WO3. The tungsten may be conveniently reported in this form, although it is probably present as a lower oxide. The acid filtrate from the silica and tungstic acid is treated with sulphuretted […]
Separating Minerals by Electromagnetic
The magnetic properties of certain minerals have long been recognized, and their concentration through magnetism can lay no claim to novelty. A patent was awarded in England on a process for separating iron minerals by means of a magnet in 1792, and in this country a separator having a conveyor belt for presenting ore beneath […]
Electrostatic & Magnetic Separators
The gradual depletion of high-grade mineral deposits and the necessity for development of lower-grade deposits, together with the increased demand for nonmetallic minerals, has increased the importance of the ore-dressing field during recent years. There is strong need for development of new ore-concentration methods and machines to keep pace with the constant changing of marketing […]
Chalcocite Copper Ore Deposit for In Situ Leach Mining
Mineral Park Geology The Mineral Park mine is located in the central part of the Wallapai mining district of northern Arizona. Mineral Park is a copper-molybdenum deposit within and adjacent to a Laramide quartz monzonite porphyry intrusion. Minable copper reserves have been estimated to exceed 40 million tons of .2 pct or greater. The geology […]
Effect of Lift and Climate on Heap Leaching Efficiency
Individual Lift Height The height of each lift, or bench, of ore placed on the leach pad determines the area of liner required for a given amount of ore before subsequent lifts are placed over the first lift. The higher the lift height, the less liner required (at least initially), the higher the solution grade, […]
Reagent Conditioning to Improve Flotation Selectivity
Reagent conditioning is recognized for its effect on flotation. Among the individual conditioning parameters that were identified to significantly affect the phosphate grade and recovery were reagent dosage, pH, solids content, conditioner configuration, conditioning time, mixing intensity, and the presence of residual clay (Davis, 1992). However, preliminary results identified the conditioning time and mixing intensity […]