Gold mineral crusher mill for sale
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Posted On :
Nov-27-2011
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Article Word Count :
851
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Alluvial gold processing mainly adopts gravity dressing, this is because, on one hand, the specific gravity of alluvial gold (an average of 17.50 ~ 18.0...
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Gold in the ore were very low, in order to extract the gold, you need to crushing and grinding ore, using mineralprocessing methods to pre-enrichment or separate gold from the gold ore. The used more in gold ore dressing are gravity separation and flotation, gravity separation occupies an important position in gold production, flotation is widely used in gold mine beneficiation.
Crushing and grinding use jaw crusher for coarse crushing, standard-type cone crusher for intermediate crushing, while the short head cone crusher and roller crushing machine for fine crushing. Small and medium gold beneficiation factory more use a two-stage and a closed-circuit ore crushing folw, large gold beneficiation factory selecte a three-stage and a closed-circuit ore crushing flow. In order to improve dressing production capacity and mining equipment potential, we need to modify the crushing flow, so that the grinding machine utilization factor can increased, the main measures taken is the implement more crushing and small grinding, and reduce the input ore particle size. gold ore crusher
gravity separation Used widely in the rock gold mine, more as an auxiliary process in the grinding circuit to recover coarse gold, create a favorable conditions for flotation and cyanidation process to improve the mineral targets and raise the total gold recovery rate, it has play a positive role in increasing production and reducing the cost. Floating - gravity joint process (flotation tailings are use gravity separation) is suitable for choosing, we should vigorously promote the stage grinding and stage sorting process in the future, advocate can be collected and early collected of dressing principle.
Flotation Most of the gold concentrate that chosed by flotation method are sent to the near nonferrous smelter for further processing. As the development of cyanidation in gold refining and the company need to improve economic returns, and reduce the loss of ore transportation, product mix has great changes in recent years, now most adopt site processing (of course, because the contradiction between the smelt and pricing and other issues, forcing the mine to On-site handle) to promote greater development of the flotation process. This has plays an important role in gold production. Usually has differential floatation and bulk flotation two processes.
Chemical mineral processing - hydrometallurgical gold extraction process
Amalgamation gold extraction process or cyanidation gold extraction process
Gold smelting and recycling Gold smelting is the last process in gold production, its products are gold, smelting are divided to smelting and refining. Crude refining products are the alloy (commonly known as the co-metallic gold), gold bonanza blocks and a variety of refined products are shipped to non-ferrous smelter for further process and refine to finished product gold (commonly known as the gold content).
Heap leach production process Using conventional cyanidation mention gold process to process low-grade oxide ores is not worthwhile in economic, while the use of heap leach production process has economic benefits. As the gold heap leaching process is simple, easy operation, low investment, effective, quick effect, so the gold heap leaching technology developed rapidly.
Gold extraction
Some of the gold extraction come from alluvial gold and some from vein gold, Since 1970, output of vein gold remains 75%～85%, and output of alluvial gold occupies 15%～25%.
Common methods of alluvial gold processing plant
When the deposit of primary gold outcrops out of earth’s surface, because of the mechanical and chemical weathering, the gold-bearing veins or the gold-bearing rocks were gradually broken into debris and gold grains. Then, due to transportation and screening of external forces, the minerals with a high specific gravity (e.g. gold grains) deposited on hillsides, river beds and shores of lakes and seas, formulating certain enrichments, which are valuable for industrial extraction and were called as gold placer. Gold placer usually extracted by dredger, hydraulicking, excavator and underground (shaft well) extracting, etc. China's gold placer is mainly extracted by dredger, and supplemented by hydraulicking and excavator. The dressing process of alluvial gold mainly includes preparation before processing, and processing. The preparation consists of crushing and screening. Crushing is mainly to dissociate clay mineral mud from mineral grains. Screening is to screen out the coarse grains without gold. The common equipments are flat screen, cylinder screen and cylinder scrubbing machine. gold ore beneficiation
Alluvial gold processing mainly adopts gravity dressing, this is because, on one hand, the specific gravity of alluvial gold (an average of 17.50 ~ 18.0), as well as the graininess, is large, on the other hand, the gravity dressing is relatively economical and simple.
Gravity separation equipment usually adopts various chutes, jigs and concentrating tables (commonly used for fine screening).
Common methods of vein gold processing
Because of the different natures of the various types of gold ore, the methods of ore dressing are different, but generally, the gravity separation, flotation, amalgam and cyanide process, as well as the new processes in recent years such as resin-in-pulp process and heap leaching of gold are adopted. For certain types of ore, the technological process of joint gold extraction is adopted.
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Article Source :
http://www.articleseen.com/Article_Gold mineral crusher mill for sale_110423.aspx
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Author Resource :
gold processing plant,
gold ore beneficiation plant,
gold ore crusher
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Keywords :
gold ore crusher, gold processing plant,
Category :
Business
:
Marketing
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