Reagents & Chemicals

MBT 2 Mercaptobenzothiazole Flotation Collector

To study the effects of collector and hydrogen ion concentrations on the floatabllity of sulfide minerals, a series of flotation experiments were conducted in which flotation recoveries as a function of pH were measured by flotation tests in a laboratory flotator. The results of flotation tests using -100 +200 mesh size galena particles as a … Read more

Reagents to Recover Gold

The industrial processing of ores containing precious metals such as gold is generally very mining site specific. The variety of various mineral processing techniques employed is extensive and includes size reduction, size classification, gravity separation, roasting, cyanidation, chemical and/or bacterial leaching, ion exchange and/or solvent extraction, and froth flotation. Gold occurs in the earth’s crust … Read more

Sodium Silicate Uses & Applications

The practical application of common alkaline inorganic chemicals such as lime, soda ash, caustic, silicates and phosphates, in the beneficiation of minerals, is well known within the industry. These materials have been found to be useful throughout the flotation circuit. This paper discusses the chemistry of the soluble sodium silicates in relation to their use … Read more

Uranium Leaching Lixiviants

This Bureau of Mines publication provides information to assist in selecting a lixiviant (leach solution) for in situ uranium leaching. The cost, advantages, and disadvantages of lixiviants currently used and proposed are presented. Laboratory and field tests are described, and applications of geochemical models are discussed. Environmental, economic, and technical factors should all be considered. … Read more

Clay Flocculant

Under its mission to effect pollution abatement, the Bureau of Mines began intensified research seeking means for economically disposing of the large amounts of Florida phosphatic clay wastes and reclaiming the mined land. The clays, which are discharged from the processing plants at about 3 to 5 pct solids , have colloidal characteristics and are … Read more

Diatomaceous Earth Filtration of Cyanide Leach Liquors in Merrill Crowe

In many instances, Diatomaceous Earth (DE) filtration could be considered a relatively recent technology. In the late 1800’s there were many references to the use of DE in small scale filtrations and in most instances these were laboratory curiosities. The use of DE in the sugar industry was proposed in the 1880’s, but this was … Read more

Flux Lime

All  forms of “lime” are used in the steel plant. Calcium hydroxide is used for water treatment, acid neutralizing, and as a lubricant for wire drawing. All the other limes are used as fluxes in the sintering plant, blast furnace or steel producing furnaces. In the production of self flux or super-flux sinter, high calcium … Read more

Dodecyl Mercaptan Collector for Sulfide Ores

An analysis of a commercial flotation operation cannot be undertaken without considering the effectiveness and characteristics of the mineral collector. While many operations show satisfactory metallurgical performance, others are characterized by low recoveries of certain metals. Factors such as inadequate liberation, surface oxidation of sulfide minerals, or the adverse or depressing action of some modifying … Read more

Natural Flotation Reagents form Plants

The reagents now used in flotation consist of various acids or salts, which may be either electrolytes or nonelectrolytes, dissolved in water and some substance or combination of substances, which function as collecting or frothing agents. At times the only dissolved salts present are those naturally occurring in the water used. The general effect of … Read more