Gold's major industrial minerals and gold ore types
At present, there are not many gold minerals found in nature, about 20 kinds. The most common native gold, gold and silver gold and silver mine, followed by tellurium and tellurium, gold and silver mines, etc., although many species, widely distributed, but not much; as for gold by bismuth was selenide Tellurides and sulfides are even rarer. Spare Part Of Fracturing Pump,Concrete Pump Spare Parts,Pump Spare Parts,Spare Part Main Pump Jiangyin Yida Machinery Manufacturing Co.,Ltd. , https://www.yidamachinery.com
Natural gold is rarely pure gold and often contains unequal amounts of silver or other elements. Natural gold generally has irregular granular, flaky, milky droplets, rounded, clumped, reticular, fibrous, dendritic, and spongy aggregates. According to the particle size, it is divided into giant gold (>0.295 mm), coarse gold (0.295-0.074 mm), medium gold (0.074-0.037 mm), fine gold (0.037-0.01 mm), and fine gold (<0.01 mm). ), generally, the gold particles are coarser and the vein gold (rock gold) has a smaller particle size.
Natural gold has metallic luster, mostly golden yellow. When silver is high, it is light yellow or milky yellow, hardness is 2 to 3, specific gravity is 15.6 to 18.2, and pure gold is 19.3. The identification of natural gold in the wild is mainly based on the characteristics of gold color, metal sweat, hardness and small bite with marks.
Silver gold ore is a kind of natural gold. The mineral contains 20-50% silver, 80-50% gold, the color is light yellow or milky yellow, the hardness is 2~3, and the specific gravity is 12,5~15.6.
Gold and silver mines are subspecies of natural silver. The minerals contain 50-80% of silver and 50-20% of gold. The color is usually light yellow or bright yellow, metallic luster, hardness of 2 to 3, and specific gravity of 10.5 to 12.5.
AuTe2: The theoretical component Au is 43.5% and Fe is 56.41%. Mostly granular aggregates, a copper color to a yellow color is silver-white metallic luster, secondary to conchoidal fracture uneven hardness of 2.5 to 3, more than 9.1 to 9.4.
A gold-bearing mineral is a useful mineral or gangue mineral of a certain gold or gold deposit. Such as chalcopyrite, pyrite, galena, sphalerite, pyrrhotite, chalcocite, stibnite, bismuthinite, arsenopyrite minerals like gold content generally higher, and often cracks gold, The form of gold gap, gold or gold is carried by a certain mineral. Therefore, the occurrence of gold in gold-bearing minerals is complicated.
There is no uniform method and standard for the classification of gold ore types. According to the complexity of ore composition and the difficulty of ore dressing , it is roughly divided into the following categories:
1. Sulphide-poor gold ore;
2. High sulfide gold ore;
3. Polymetallic sulphides containing gold ore;
4. Gold-containing oxidized ore;
5. Gold-bearing tungsten ore.