The composition usually contains cobalt, nickel and selenium, and has a NaCl crystal structure. White iron ore with the same composition and orthogonal (rhombic) crystal system is called white iron ore. The components often contain trace elements such as cobalt, nickel, copper, gold and selenium, which can be comprehensively recycled in the process of sulfur extraction when the content is high.
Pyrite is iron disulfide. Pure pyrite contains 46.67% iron and 53.33% sulfur. Pyrite is generally used as raw material for producing sulfur and sulfuric acid, not for ironmaking, because ironmaking has better iron ore. Pyrite is widely distributed and can be seen in many ores and rocks, including coal. Generally speaking, it looks like a brass cube. Pyrite will become limonite or jarosite after weathering. Pyrite can be generated by magmatic segregation, hot water dissolution or sublimation, and can also be generated in igneous and sedimentary rocks. In industry, pyrite is used as raw material to produce sulfur and sulfur dioxide.
The chemical composition of pyrite is FeS2, which is the main mineral raw material for extracting sulfur and producing sulfuric acid. Its crystal belongs to sulfide minerals with equiaxed crystal system. The composition usually contains cobalt, nickel and selenium, and has a NaCl crystal structure. There are always complete crystal forms, such as cubes, octahedrons, pentagonal dodecahedrons and their aggregates. There are stripes parallel to the crystal edges on the crystal faces of the cube, and the stripes on each crystal face are perpendicular to each other. Aggregate is dense, massive, granular or nodular. Pale yellow (copper yellow) color, green and black stripes, strong metallic luster, opacity, no cleavage and jagged fracture. Mohs hardness is relatively high, reaching 6-6.5, which can't be carved with a knife. Specific gravity 4.9-5.2. Under the surface conditions, it is easily weathered into limonite.
Pyrite is the most widely distributed sulfide mineral and can exist in all kinds of rocks. Pyrite is the main raw material for extracting sulfur and producing sulfuric acid, and it 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. The world-famous producing areas are Riotto, Czech Republic, Slovakia and the United States. China's pyrite reserves rank among the top in the world, and the famous producing areas are Yingde, Yunfu, Maanshan, Anhui and Baiyin Factory, Gansu.