Innovative Processes

Treatment of Mixed Sulfide Oxide Ores of Copper

Many of our largest copper deposits contain both sulfide and oxidized copper minerals. The large porphyry mines, with a total copper content of from 1.3 to 2.0 per cent., send to their mills ore with an oxide content of from 0.2 to 0.4 per cent. While the recoveries of the sulfide minerals are considered satisfactory, using modern flotation practice,

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Gold Ore Roasting Plant

To achieve optimum gold recovery from the certain sulfide ore body, the ore must be finely ground to achieve proper oxidation and mineral separation. The ore is separated into stockpiles after it has been mined. These stockpiles are based on gold content, sulfide content, and carbonate content. The ore is blended prior to being fed into the crushing

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Chemical Smelting

Some of us who have been acquainted with the present methods of production of metals, and who have had an opportunity to witness the impact of some of the newer chemical techniques on metallurgy, have become convinced that it is possible to consider seriously the treatment of sulfide minerals by strictly chemical methods as distinct from pyrometallurgical

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Electrolytic Refining

The list of pure non-ferrous metals so widely used in modern industry includes many that are produced by electrolytic means, such as copper, zinc, nickel, aluminum, magnesium, lead, sodium, cadmium, calcium and many others. In the case of some metals, ordinary fire or chemical methods of production are important, but in others, 100 per cent of the

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Leaching Mercury Sulfide

Hydrometallurgical methods have received increased attention for the treatment of many ores in recent years. Whereas, direct furnacing has been regarded as the standard process for mercury (cinnabar) ores, hydrometallurgical methods offer an alternate consideration. The chemistry of this process is not new, but with the impetus to hydrometallurgical

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LPF Process Metallurgical Testing


A Metallurgical Laboratory had completed preliminary economic studies on various processing options applicable to the Minerals Project in South America, containing oxide, transition and sulfide ore reserves. These included heap leaching with SX-EW; use of Roast-Leach-EW of sulfide concentrates to produce CuSO4 crystals; and potential application of the Leach-Precipitation-Flotation (LPF) option to treat all the three ores from Deposit. The results of the above studies indicated that the potential use of LPF provided the best preliminary economics. Based on the above premise, Minerals authorized Metallurgical Testing Laboratory to undertake an in depth study to confirm the practical and economic viability of the proposed LPF process for treating the ores under a two-phased project. The results of the initial H2SO4 consumption tests under Phase I of the project indicated that while the amount of acid required for oxide and transition ores were reasonable (94.6 lbs/ton and 155.2 lbs/ton respectively) the acid consumption for sulfide ore was very high (588.6 lbs/ton). Based on this fact, it was jointly (Metallurgical Testing Laboratory) decided to exclude the sulfide ores from the proposed LPF process. Thus, the sulfide ores will be treated by the conventional sulfide flotation process as planned. The first step in ….Read more ←   Read The Full Metallurgy Article

Recycling Sand from Foundry Casting Molds

The flowsheet shown in this study is particularly adapted to the requirements of the average foundry to reclaim foundry sand for re-use. Any foundry whose new sand delivered costs is too high should seriously consider reclamation with the flowsheet as illustrated. This reclaimed sand is usually equal to, or better than the original sand. Foundry

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Mining Business Plan

The following document outlines a mining business proposal to design and construct a free standing toll plant facility, known in this document as Peru Toll Treatment (PTT), in southern Peru to accommodate the needs of a growing quantity of small scale miners who produce up to 14 percent of the country’s annual gold production.

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Metallurgical Testwork for Process Development

Mineralogy & Microscopy

Amenability of an ore to flotation is best tested for by a microscopic examination of the ore followed by a few laboratory flotation tests. As stated in Chapter I, most ores containing minerals of metallic, resinous or adamantine luster associated with minerals of earthy, vitreous, or pearly luster, can be divided by froth flotation

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