The Reasons For Purifying Iron Ore

The reasons for purifying iron ore

The reasons for purifying iron ore

Quartz is inorganic mineral, whose main components are silicon dioxide, and often a few of impurity ingredients such as aluminium sesquioxide, magnesium oxide and calcium oxide etc, appearing to be translucent or opaque crystal, generally ivory and hard. Quartz is a kind of mineral resource with stable physical characters and chemical properties, crystal belongs to oxide minerals of three party crystal system , namely the lower temperature quartz (a-quartz), is the widest-spread mineral kind in mineral group. Extended quartz also includes high-temperature quartz (b-quartz). Quartz, also called silica, mainly is the raw material of quartz sand (also called silica sand) production, also quartz refractory material and fire ferrosilicon materials. In addition, "quartz" is a common person name.

Why iron ore need purifying? For the pig iron is brittle, less elasticity, which is not easy to processing, casting and welding. It is mainly used for the lathe bed, hull, bottom case, iron pan and etc. However, steel has nice toughness, plasticity and weldability, which can be calcining; recycle flattening, laddering and easy for machine operation. So steel has widely applications. As pig iron and steel have the same molecular formula Fe, why there is a so big difference between them. The carbon content of iron ore is high, and it also contains some impurities, such as Si, Mn,S. Generally, the material carbon content more than 2% is called pig iron, carbon content between 03-29 is steel, and carbon content lower than 0.03% is called dug iron. So, the steel making process means the process to lower the content of carbon and to remove the impurities in the pig iron. Workers usually summarize this progress simply as: drop carbon, adjust silicon and manganese, and remove sulphur and phosphorus.

Main advantage of dry process is low heat consumption (Energy consumption for dry process kiln clinker production line with preheater is 31403768 J/Kg). The disadvantages are: raw material not easy admixture even, big dust emission in workshop and high power consumption. Wet process is with following advantages: easy to operate, easy to control the raw ingredients, superior quality of products, easy to convey slurry and low dust emission in workshop, with disadvantage of high heat consumption (Heat consumption of clinker production is generally 52346490 J/Kg).

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by: nicole

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