Chalcopyrite: It is a copper-iron sulfide mineral, and the stripes of black pyrite with green stripes are green and black.

Pyrite: light yellow with gray-green to black stripes and metallic luster, mainly used for refining sulfuric acid.

Galena: lead gray, striped gray-black, metallic luster, hardness 2.5.

Extended data:

The main uses of natural gold:

General industrial requirements (g/t): rock gold, cut-off grade Au 1~2, lowest industrial grade Au3~5, average grade Au 5 ~ 8；; Placer gold, cut-off grade of mixed sand Au 1~2, lowest industrial grade Au0.04~0.08, lowest industrial grade Au0. 14~0.20.

Gold is mainly used for decoration, currency and industrial technology. Its purity is expressed by K (K), pure gold is 24K (containing gold 100%), 18K is equivalent to 18 parts of gold and 6 parts of other metals in 24K, and so on.

Gold is measured in ounces, 1 ounce (oz)=3 1. 103g.

Gold is widely used in electronic industry because of its high electrical and thermal conductivity, good ductility and stability. Aerospace technology requires high stability of radio and electronic components, and gold has this performance.

Gold is also used as the lining of nuclear reactors. In aerospace and aviation industries, gold is used to coat the heat shields or screens of jet engines and rocket engines.

Pyrite application:

Industrial use: Pyrite is the main mineral raw material for extracting sulfur and manufacturing sulfuric acid. When associated elements contain gold, cobalt and nickel, they can be extracted.

Making ornaments: Pyrite is also a very cheap ancient gem. In Victorian England (A.D. 1837- 190 1), people liked to decorate this gem with special shape and ornamental value. It can be used not only for grinding precious stones, but also as a base for jewelry, jade and other handicrafts.

Catalyst: 20 12 In April, the research team led by StephenJenkins of Cambridge University explored the catalytic activity of pyrite through electronic structure calculation. Researchers focus on the reaction between pyrite and nitrogen oxides (nitrogen oxides), one of the air pollutants.

Next, the researchers plan to apply pyrite to strategic industrial reaction processes, such as ammonia in fertilizer production, hydrocarbon fuel synthesis of renewable biomass and hydrogen extraction of fuel cell electric vehicles? [5]。

Medicinal uses: Medicinal native copper is pyrite (crushed or calcined), also known as chalcedony lead. Efficacy: removing blood stasis and relieving pain, and connecting bones and tendons.

Traditional Chinese Medicine Preparations: Huoxue Zhitong Powder, Zhong Jun Da Die Powder.

Genesis and occurrence of chalcopyrite;

Chalcopyrite is widely distributed and can be formed under various conditions. It is mainly crystallized by magmatism, contact metasomatism and ore-forming hydrothermal process. * * * Biogenic minerals include pyrite, galena, sphalerite, bornite, molybdenite, pyrrhotite, arsenopyrite, cobalt ore, chalcocite, celestite and chalcopyrite. Non-metallic minerals include calcite, quartz and feldspar.

Different mineralization produces different chalcopyrite mineral combinations. Chalcopyrite is a mineral that is difficult to be oxidized by bacteria. Chalcopyrite is relatively inactive in copper sulfide. When bacteria oxidize chalcopyrite, copper ions enter the solution. Because copper is a component of some enzymes, trace copper is beneficial to the growth of bacteria. However, when the amount of copper ions entering the solution is large, it will produce toxicity.

Galena application:

Galena is the main mineral for extracting lead. The uses of lead are both ancient and extensive, such as movable type printing, lead-clad cables, lead-tin alloy plating on steel plates, national defense, science and technology, pencil lead and so on. Ancient Greek navigators used lead paint to remove barnacles and other creatures attached to the bottom of ships.

It turns out that lead has good corrosion resistance. Painted with lead paint, the ship looks like wearing a layer of armor, which magically eliminates the invasion of algae and protects the bottom of the ship from being shattered by waves. Lead is the basic raw material for manufacturing weapons materials.

Lead can be used as a material for shielding radioactive radiation, and in power machinery, lead can be used as storage battery, electrode plate and so on.

Galena is the most important lead ore because 87% of its weight is lead. Because it can also contain as much as 1% silver, it has also been used to extract silver in the past. Lead has been widely used in metallurgical industry, national defense, science and technology, electronic industry and other fields.

At the same time, lead is a very toxic heavy metal element, which has its disadvantages to the environment and human life and production. Galena is widely distributed, mostly occurring in contact metasomatic deposits and medium-low temperature hydrothermal deposits, and often coexists with sphalerite, chalcopyrite and pyrite.

It is unstable in the oxidation zone and is easy to be converted into minerals such as lead alum and galena. Medicinal lead in traditional Chinese medicine, alias black tin and black lead, is extracted from galena. Has the effects of inhibiting adverse reactions, eliminating phlegm, killing insects and removing toxic substances.

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