Along with mechanized mining equipment, froth flotation dramatically improved the efficiency of gold mines. Thanks to this process, miners and refiners are able to extract quality minerals from ore at lower grades than has been previously possible – making it perhaps the most important mining industry innovation of the 20th century.
Outotec has been awarded a contract by Goldcorp for the delivery of various process equipment for Peñasquito's pyrite leach process in Mexico.
Flotation circuits in commercial gold concentrators are described, along with modern plant practice for various ore types, including refractory gold, arsenopyrite, …
COPPER FLOTATION CIRCUIT. The cyclone overflow from each ball mill goes to a Pulp Distributor which distributes the pulp to two or more parallel banks of Flotation Cells.
It started with chalcopyrite flotation against pyrite with MBS added in the mill before grinding and in the conditioning cell before flotation. The surface properties of pyrite exposed to different reagent schemes were investigated by X-ray photoelectron spectroscopy (XPS) analysis.
A novel flotation scheme which uses nitrogen flotation of pyrite ahead of sphalerite recovery was investigated on a continuous basis at Brunswick Mining employing Noranda designed minicells.
Semi-industrial tests were conducted to investigate the feasibility and efficiency of a combined column and mechanical flotation cell process for the beneficiation of Sanshandao low-grade gold ore. The results showed that the performance of the combined flotation process of the cyclonic-static microbubble flotation column …
In mineral processing, poor froth-flotation performance translates into both an enormous loss of revenue and an unnecessary waste of the ore reserve. In this context, Bacís Mining Company developed a versatile new, high-performance flotation-cell design that can be incorporated into various flotation circuits. The main feature of this circular …
Pyrite has long been used as a source of sulphur, and its recovery as a by-product from the flotation of certain base metal ores is a well established practice. Large tonnages of mill tailings which have accumulated as a result of various milling operations frequently contain significant amounts of pyrite. In many instances these tailings can be …
The influential role of collector type and hydrogen peroxide on differential flotation of pyrite and arsenopyrite have been investigated. Generally, differential flotation of pyrite and arsenopyrite was defined by collector type, hydrogen peroxide addition, pulp pH, collector concentration and mineral surface oxidation species.
When dealing with arsenic-containing gold ore, the concentrator generally adopts flotation separation, mainly mixed flotation, priority flotation and separation flotation. The following will introduce the three kinds of flotation separation technique and the reagent system used.
In this work, different flotation–preoxidation–cyanidation methods are considered for treating a low-grade refractory gold ore. On the one hand, the results of selective flotation show that 22% and 31.1% of total Sb and As, respectively, remained in the final tailings and only about 28% of the total Au remained for further cyanidation …
Tests on Sulphur Mining and Railroad Pyrite. Sulphur Mining and Railroad pyrite was mixed with clean, siliceous sand, in a manner similar to the sample mixtures prepared with Mountain Copper and Chestatee pyrite.
It was found that copper ions activate the pyrite flotation due to the formation of copper xanthate and dixanthogen. ... the improved recovery of gold from refractory auriferous sulfide ores ...
The first gold flotation testing should be confined to an all-flotation method so that the experimenter can become familiar with the ore. ... (tables or blankets and other gold-saving devices), thickening, and …
The results of Xihai adopts the technological process of flotation separation to magnetite mining separation in the magnetite mining flotation process.
Sodium cyanide is occasionally substituted for lime in the flotation of a sulphide copper ore containing pyrite, since it has a much greater depressing effect on the pyrite than on the copper minerals.
Gold flotation is a beneficiation method which uses the different physical and chemical properties of the surface of gold minerals to separate minerals.It is more suitable for the treatment of sulfide gold-bearing quartz vein ore and polymetallic gold-bearing sulfide ore with fine gold particles and high floatability.
The Model 250 SmartCell unit is the largest flotation cell in the world and was installed in 2003. The cell provides 257 m of active volume and is equipped with a 400-hp motor. ... manufacture and install Dorr-Oliver Eimco thickening systems for INCO's Goro mine project in New Caledonia. Delivery is scheduled for the spring of 2006 ...
Gold ores were obtained from the Gasado gold mine in Jeollanam-do, Korea. It is known that the gold ore consists of pyrite, muscovite, and quartz [30]. The gold ores were initially crushed using a jaw crusher and a cone crusher, and then ground using a ball mill in the gold ore beneficiation plant. Water was obtained from the plants.
Flotation is a common mineral processing method used to upgrade copper sulfide ores; in this method, copper sulfide mineral particles are concentrated in froth, and associated gangue minerals are …
Depending on the location and scale, mining methods may include open-pit mining or underground mining. Open-pit mining involves removing the overburden and …
For example, in the flotation circuit for processing copper, pyrite and pyrrhotite at a gold concentrator, the copper recovery rate is increased by 4% due to the result of aeration, and the recovery rate of gold in …
Pyrite is known to readily report to flotation concentrates, diluting their value and resulting in excess sulphur dioxide production during smelting. The presence of …
Pyrite flotation separation and encapsulation in tailings dams is proposed as a viable way to chemically stabilize tailings. Characterization of potential acid mine …
This paper presents a characterization of the different minerals recovered along industrial flotation circuits. Plant sampling campaigns, performed in a copper industrial concentrator in Chile, …
In the separating stage of copper-bearing pyrite, the pH value of the pulp must be controlled first. Under alkaline conditions, the iron ions in the slurry form iron hydroxide and accumulate on the surface of the pyrite, which improves the hydrophilicity of the pyrite and inhibits its floatability, resulting in better copper flotation conditions.
Reference is also made in a recent issue of the Mining Magazine (London) to the use of starch in the thickeners of the Raub Australian Gold Mining Company. At that property, trouble was experienced in thickening of the flotation concentrate and this was remedied by the use of a starch addition.
Furthermore, understanding interactions within polysaccharides-based depressants and other flotation reagents during pyrite flotation depression are other areas that require further investigation to advance green flotation.
The active surface entities were found to be metal xanthates for chalcocite and bornite, dixanthogen for pyrite, metal xanthate for initial flotation of chalcopyrite and dixanthogen for full flotation. For pyrite, Fuerstenau et al. (1968) found a window for flotation between pH 3 and pH 10 in the presence of ethyl xanthate. The upper limit of ...