Pyrite, along with iron oxide minerals, is often considered a toxic and dangerous mineral due to the problems it causes in the steel manufacturing industry.
Pyrite particles in the presence of iron minerals such as magnetite and Hct are not completely recovered by magnetic separator. Reverse flotation is an effective method for detoxification of magnetic concentrate. Nowadays, flotation columns are highly regarded in iron production industry due to their low capital, operating costs and the ability to produce higher concentrations than mechanical cells to reduce impurities. The aim of this study was to reduce the sulfur content of concentrated pyrite from 0.5% to 0.1% in magnetic separator of Golghar iron ore complex under column flotation process.
For this purpose, 26 experiments were designed so that the effect of the important factors on the engine performance, such as gas apparent flow rate, layer height, foaming rate, solid matter content, pulp and so on. Review.
The results showed that the flotation of the inverse column is a suitable method for sulfur removal of iron ore. Under optimal conditions, it can produce products with sulfur content of 0.08% and iron recovery rate of 99.5%. Comparison of column flotation performance with mechanical flotation in optimum conditions shows that the percentage of column flotation has a higher separation efficiency (about 4%) than mechanical flotation for milling.
Pyrite is a yellow or yellow mineral with the chemical formula FeS۲ (46.6% iron and 53.4% sulfur ) where there are metals such as gold, silver, cobalt, nickel, copper, etc., zinc, arsenic, tungsten, etc. found. Pyrite is used in jewelry, paper and color industries. Although the mineral contains large amounts of iron and sulfur, it is interesting that the mineral is not useful in iron or sulfur extraction. Since Pyrite appears to be like gold, it is also called stupid gold.
This does not mean that there is no gold in this mineral, because some pyritis contain gold, although it is mainly in small amounts in sulfides. The detection of gold from pyrite, such as pyrite, contains a large amount of sulfur, usually has a sulfur smell.
This stone is also considered a brittle and brittle stone in hardness, so it is crushed and powder hammer; Unlike gold which is a soft and flexible metal, it can easily bend and mold.
Pyrite’s brilliance is higher than gold in gold stone, as it shines in flowers. If you place this stone in the Sun, it will emit in part with a crystal (not all parts) state. Pyrite is insoluble in water, ink salt and sulfuric acid, but nitric acid is soluble. Note that nitric acid alone does not solve gold, so nitric acid can be used to distinguish gold from pyrite. Pyrite is black, green or gray, while gold is gold. (For this test, paint the golden sections of the stone on non-glazed china, such as the back of the tile or the edge of the broken, to determine the color of its outline).
Also, since gold is a soft metal, it can be cut with a sharp knife while pyrite cannot be cut with a knife. Another method for detecting pyrite is soil washing. Since gold is easy to clean and separate from impurities due to its high density, unlike pyrite, pyrite cannot be separated from impurities by washing.
However, the best way to determine whether your stone is pyrite or gold and if it contains gold, take a stone to the xrf lab, so they can analyze it for you. Of course, there is a faster and easier way, which is to dissolve some stones in sultanic acid and test the solution with tin chloride. Warning: The dissolution of pyrite in nitric acid and sultanic acid can cause the oxidizing of the stone and release of toxic metals such as arsenic, which is a serious threat to humans in this case.
Whereas, the calcium coprite is a pyrite-shaped compound, it is important to note that two different minerals have acidic properties. For example, the chloroporite has the chemical formula CuFeS۲ (actually, the mineral contains copper in addition to iron and sulfur), and unlike pyrite, it can be easily stabbed or even scratch nail tip. Moreover, the overall color is gray-green, which is dissolved in nitric acid and ink salt.
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