And the crushing and grinding mill production line we company have produced can solve various stone crushing and grinding lines .And the equipment configure of the production line depend on the stone materials specification and application customer require .And please let me know the stone specification ,output and also the specific application and we will provide you the comprehensive service in the before ,during and after –sales service .According to the specific production site ,we will strive to complete a most reasonable ,economic production line for our customers .

And the crushing process are as follows :Firstly ,the stone materials will be evenly entered the coarse crushing machine to proceed the primary crushing .And then the coarse materials will be entered the impact crusher by the belt conveyor to proceed the secondary crushing .And the fine stone materials will be entered the vibrating screen to produce various stone specification .And particle size which have not satisfied the requirements will receive the repeated crushing .

Properties

magnetite, also called lodestone, or magnetic iron ore, Magnetite.iron oxide mineral (FeFe2O4, or Fe3O4) that is the chief member of one of the series of the spinel group. Minerals in this series form black to brownish, metallic, moderately hard octahedrons and masses in igneous and metamorphic rocks and in granite pegmatites, stony meteorites, and high-temperature sulfide veins. The magnetite series also contains magnesioferrite (magnesium iron oxide, MgFe2O4), franklinite (zinc iron oxide, ZnFe2O4), jacobsite (manganese iron oxide, MnFe2O4), and trevorite (nickel iron oxide, NiFe2O4).

Magnetite has been very important in understanding the conditions under which rocks form and evolve. Magnetite reacts with oxygen to produce hematite, and the mineral pair forms a buffer that can control oxygen fugacity. Commonly igneous rocks contain grains of two solid solutions, one between magnetite and ulvospinel and the other between ilmenite and hematite. Compositions of the mineral pairs are used to calculate how oxidizing was the magma (i.e., the oxygen fugacity of the magma): a range of oxidizing conditions are found in magmas and the oxidation state helps to determine how the magmas might evolve by fractional crystallization.

Small grains of magnetite occur in almost all igneous rocks and metamorphic rocks. Magnetite also occurs in many sedimentary rocks, including banded iron formations. In many igneous rocks, magnetite-rich and ilmenite-rich grains occur that precipitated together from magma. Magnetite also is produced from peridotites and dunites by serpentinization.

Magnetite is a valuable source of iron ore. It dissolves slowly in hydrochloric acid.

Distribution of Magnetite

Magnetite ore is produced more in magmatic rock, metamorphic rock, and beach sand. Magnetite ore which contains more than 72.4% iron materials is the most important iron ore whose harmful element is fewer. This kind of magnetite ore can be directly used in steel production in open hearth. Some titanium, vanadium, chromium contained in the magnetite ore can be comprehensively applied in the smelting process.

Magnetite ore is rich in Russia, North America, Brazil, Australian and China, etc. In Russia quarry mining crushing plant, magnetite ore is largely demanded and quarried. As the main raw minerals materials for steel production, magnetite ore quarry crushing screening plant is established in Brazil mining, Australia mining and Russia quarrying, etc.

Huge deposits have been found in banded iron formations. These sedimentary rocks have been used to infer changes in the oxygen content of the atmosphere of the Earth.

Large deposits of magnetite are also found in the Atacama region of Chile, Kiruna, Sweden, the Pilbara, Midwest and Northern Goldfields regions in Western Australia, and in the Adirondack region of New York in the United States. Deposits are also found in Norway, Germany, Italy, Switzerland, South Africa, India, Mexico, and in Oregon, New Jersey, Pennsylvania, North Carolina, Gulinia, New Mexico, Utah, and Colorado in the United States. In 2005 an exploration company, Cardero Resources, discovered a vast deposit of magnetite-bearing sand dunes in Peru. The dune field covers 250 square kilometers (100 sq mi), with the highest dune at over 2,000 meters (6,560 ft) above the desert floor. The sand contains 10% magnetite.

Magnetite Crusher

Compared with magnetite ore, there are generally 50%~60% iron element in hematite ore. It’s better to deoxygenize by using hematite ore. Therefore, hematite ore is also widely used to steel production. In Sweden, Chile, Brazil mining, there are large quantities of hematite ore.

Take the India iron ore as example. India is rich in common high-quality iron ore minerals which mainly include hematite ore and magnetite ore. In India iron ore mining, there are some essential iron ore crushing equipment, iron ore grinding equipment, powder screening equipment and conveyor system.

Traditionally, the Australian iron ore industry has been based on the mining, production and export of high-grade hematite ores which currently account for approximately 96% of Australia’s iron ore production. We have designed and established dozens of magnetite ore crushing screening plant.

We manufacture and export magnetite crushers and hematite crushers especially for various ore quarry mining plant.