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Gold ores flotation

Nonsulfide Ore Flotation. Nonsulfide minerals recovered by flotation include native elements such as graphite, diamonds, copper, gold, and numerous oxides as well as salts such as carbonates, phosphates, tungstates, and the like. Examples of value-bearing nonsulfide, noncoal minerals include... [Pg.50]

Mining. Numerous patents have advocated the use of alkanolamines in mining appHcations. Triethanolarnine has been used as a depressent in the flotation of copper (164), in the electrotwinning of gold (165), and as an aid in the froth flotation of nickel ores. Phosphate ore flotation has been improved through the use of a fatty acid condensate with ethanolamine (166). Beneficiation of tin ore has been accompHshed using fatty acid alkanolamides (167). [Pg.11]

Gold ores can be concentrated by froth flotation, the resulting concentrate being roasted at 600-800°C to oxidize off sulphur and arsenic as their oxides. The product is extracted with cyanide under oxidizing conditions (using either peroxide or air itself) before displacement with powdered zinc. More reactive metals (silver etc.) can be removed by chlorination of molten gold. [Pg.276]

In spite of the lack of basic research on flotation of gold-bearing ores, the flotation technique is used not only for upgrading of low-grade gold ore for further treatment, but... [Pg.2]

The flotation of gold-bearing ores is classified according to ore type (i.e. gold ore, gold copper ore, gold antimony ores, etc.), because the flotation methods used for the recovery of gold from different ores is vastly different. [Pg.3]

Flotation of Carbonaceous Clay-Containing Gold Ores... [Pg.6]

FLOTATION OF CARBONACEOUS CLAY-CONTAINING GOLD ORES... [Pg.6]

Gold in the porphyry copper ore may appear as native gold, electmm, cuproaurid and sulphosalts associated with silver. During the flotation of porphyry copper-gold ores, emphasis is usually placed on the production of a marketable copper-gold concentrate and optimization of gold recovery is usually constrained by the marketability of its concentrate. [Pg.9]

Flotation of arsenical gold ores associated with base metals is accomplished using a sequential flotation technique, with flotation of base metals followed by flotation of gold-containing pyrite/arsenopyrite. The pyrite/arsenopyrite is floated at a weakly acid pH with a xanthate collector. [Pg.13]

Arsenical gold ores that do not contain significant base metals are treated using a bulk flotation method, where all the sulphides are first recovered into a bulk concentrate. In case the gold is contained either in pyrite or arsenopyrite, separation of pyrite and arsenopyrite is practiced. There are two commercial methods available. The first method utilizes arsenopyrite depression and pyrite flotation, and consists of the following steps ... [Pg.13]

Bulatovic, S.M., Evaluation of New HD Collectors in Flotation of Pyretic Copper-Gold Ores from B.C. Canada, Internal R D Report LR029, 1993. [Pg.18]

See other pages where Gold ores flotation is mentioned: [Pg.3]    [Pg.3]    [Pg.512]    [Pg.378]    [Pg.159]    [Pg.565]    [Pg.2]    [Pg.3]    [Pg.5]    [Pg.5]    [Pg.6]    [Pg.7]    [Pg.9]    [Pg.9]    [Pg.11]    [Pg.11]    [Pg.12]    [Pg.12]    [Pg.13]    [Pg.15]    [Pg.17]    [Pg.18]   


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Flotation of gold ores

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