Magnetite is widely distributed and has many causes. Kiruna, Sweden is a typical magma deposit. The Laco iron ore mine in Chile is formed directly from the pulp associated with volcanism. The iron ore formed by contact with metamorphism can be exemplified by China Daye Iron Mine. The iron ore formed by the regional metamorphism of the deposited iron-bearing strata (such as the iron ore in the Anshan area of China) is dominated by magnetite and hematite. It is large in scale but low in grade and is the most important in the world. Source of iron ore. The former Soviet Union, North America, Brazil, and Australia all have such large iron ore mines. Magnetite is rich in specificity and has the ability to resist weathering, so it can also be enriched in riverbed or coastal sand. After being oxidized, it can be converted into hematite; if it retains its original shape, it is called illusory hematite.
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First, the pressure range of the expansion joint: The pressure of various types of expansion joints is the design pressure Pd (MPa) at t=20 °C. The pressure range is usually from vacuum to 4 MPa....
With the continuous development of the society, people's living standards are constantly improving, and the quality of life is getting higher and higher. We need to cook cooking in the kitchen every...
For the novice who cooks, the first time to cook, the kitchen is just like a slap in the face, smoked and smoky, I don’t know which one is burning. At this time, there is a kitchen range hood,...
commercial induction cooker, Commercial Induction Cooker, Induction cooker, induction cooker Nowadays, basically every family will have a range hood, range hood and gradually become a must-have...
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