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. Yarn Feeder Stop Motion,Electronic Yarn Feeder,Broken Yarn Self-Stop Device,Yarn Break Self-Stop Device Changzhou Longfu Knitting Co., Ltd. , https://www.czcircularmachine.com