Fluorocarbon & Hydrocarbon Collectors
Quartz did not float significantly at any pH value between pH2 and pH12 when any of the anionic collectors were used. The flotation of alumina with anionic collectors is depicted in figure 1. It can be seen that SOL functions as a good collector for alumina over most of the pH range studied, the recovery […]
Increase Uranium Recovery by Nitric Acid Leaching
To meet these uranium demands, larger, lower grade, and refractory ore bodies will need to be exploited. The utilization of these ores will require the development of new and improved processing technology. In its program of Advancing Minerals Technology, the Bureau of Mines is investigating innovative methods for recovering minerals and metals from low-grade and […]
Flocculation Dewatering Clay
As part of its mission to effect pollution abatement in mineral processing, we entered into a cooperative research project with 10 Florida phosphate mining companies. The objectives of the project were to seek means for disposing of phosphatic clay wastes and for reclaiming mined land. Phosphatic slimes represent one of the principal waste products resulting from […]
Aluminum Sulfate Leach Solution Extracting Iron
Increasing usage of aluminum and competition for foreign reserves of bauxite have created a renewed interest in the development of domestic aluminum resources. Investigations were conducted into producing aluminum from domestic clays, anorthosite, and alunite in order to assure a continuing supply in the face of an uncertain world situation. Processes were developed that were […]
Diamond Processing Plant & Equipment
World demand and production of diamonds both for gem and industrial purposes has increased nearly five-fold during the past 25 years. Improved mining and recovery methods together with the discovery and development of new fields has enabled mining operations to fill the growing demands. Producing areas in South Africa, South West Africa, The Congo Republic, […]
Batch Cyanidation Leaching of Flotation Concentrate
The production of gold bullion from gravity or flotation concentrates is often an important economic consideration for an isolated gold mining operation. It is assumed in this case that the coarse free gold has been recovered by the Mineral Jig in the grinding circuit and that the jig concentrate has been amalgamated. This treatment produces […]
COARSE FLOTATION
COARSE FLOTATION OFFERS IMPORTANT SAVINGS THROUGH REDUCED OPERATING COSTS Grinding cost varies greatly depending upon the size reduction required. For example, it takes approximately 50% less horsepower to grind from ½” to 48 mesh than it does to grind the same material from ½” to 100 mesh. Many minerals are liberated at a coarse mesh […]
Placer Deposit Processing
The handling of large quantities of gold-bearing gravels is of utmost importance for most successful placer operations. In addition to providing efficient washing and recovery methods, the placer plant should be constructed as a compact unit that can be readily moved. This is an important consideration because the washing and recovery plant should be close […]
CHUTE SAMPLER
CHUTE SAMPLER FINDS WIDE APPLICATION ON DRY MATERIALS Many installations are confronted with sampler arrangements where the material is handled in chutes and installation of samplers either result in excessive dusting or substantial loss of headroom. The Chute Sampler is a compact, dependable automatic sampler unit which is ready for installation in a chute. Headroom […]
Zinc Electrolysis
Zinc Electrolysis was studied to help maintain an adequate domestic minerals base, the Bureau of Mines is investigating an aqueous chlorine-oxygen leaching procedure to produce ZnCl2 from sulfide concentrate and is also studying a fused-salt electrolytic technique to produce zinc metal from ZnCl2. Several chlorine leach/electrolysis methods for treating zinc ores and concentrates have been […]