Platinum – Palladium Flotation
An exploration program initiated by Johns-Manville Corp. resulted in the discovery of significant occurrences of platinum-group elements in the Stillwater complex of south-central Montana. The mineralization occurs in a horizon of relatively sulfide-rich anorthositic rocks within the Banded Zone of the complex. The favorable horizon is continuous over a strike length of 24 miles. The […]
Chlorination of Titanium Carbide
The purpose of the Bureau research described in this report was to devise a procedure for producing TiCl4 from titaniferous raw materials, especially those that are high in CaO content. This research supports the Bureau’s goal of maximizing the recovery of minerals and metals from domestic resources in order to assure an adequate supply of […]
Potash Refining
The Sylvinite ores mined in conventional mines contain Sylvite (20 to 30% K2O), Halite, sometimes Carnallite and 1 to 5% insol. Liberation, in some cases, is substantial at 1 cm (3/8 inch), and virtually complete in all cases at 14 mesh. The separation processes include dissolution of the Carnallite, and removal of the insols, followed […]
Cone Crusher Plant Design
The trend in the design of fine crushing plants is in the direction of the horizontal arrangement with all crushers on a single floor. Conveyors from the coarse ore bin or stockpile, feed the scalping screens which are usually double decked. When the feed to the fine crushing plant contains less than 15 percent passing […]
Portable Jaw Crusher
Comprehensive underground hard rock mining studies pointed out that significant reductions in ore handling costs could be attained if portable, low headroom, hard rock crushers were available to permit economical belt haulage from temporary locations close to production sites. Prompted by these reports a specific “Application Study of Portable Jaw Crusher” was initiated to quantify […]
Pit Dewatering
Steady-State Pit Dewatering Simulations: Steady-state simulations of the observed potentiometric surface of the aquifer were used to calibrate the model. Calibration is the procedure by which initial input parameter values are adjusted to produce a more accurate simulation of the observed potentiometric surface. Initially, the field values of hydraulic conductivity, aquifer recharge, streambed permeability, and […]
Pellet Cold Bonding
This paper describes the production of cold or low temperature bonding method using sponge iron powder as a binder for iron bearing material after balling. Development of cold bonding pellet methods Theoretical foundation of the cold bonding pellet method The bonding mechanism of cold bonding pellets using sponge iron powder as a binder is based on […]
Overland Belt Conveyors
The answer to the question of how to economically move bulk materials for the industrial plant is an important facet of plant engineering. Should it be by rail, truck, tramway, water, belt conveyor, or a combination of these methods? Each system is different, and must be examined. Proximity to navigable water, terrain, availability of land, […]
Ferrocyanide Methods of Analysis & Assay Procedure
QUALITATIVE DETECTION Because of the distinctive colors of the precipitates formed, various cations have been proposed for the qualitative detection of the ferrocyanide ion. Since interference frequently occurs, some care is usually necessary. As an illustration, the following condensed procedure serves for the detection of the ferrocyanide ion in the presence of ferricyanide and thiocyanate: […]
Ferrocyanide Toxicity
It is generally agreed that the ferrocyanide ion is of a low order of oral toxicity, even in relatively large dosage. Kobert states that potassium ferrocyanide in alkaline solution is nontoxic. In Precis de Toxicologie it likewise is asserted that this salt is nonpoisonous and that it is useful as a diuretic. There is recorded […]