SBM set up a local branch office in Chile, which is one of the most important sales markets of SBM in South America. Each year, a large number of clients purchased crushing and powder-making machineries produced by SBM, and we have won trust from our clients because of the high-quality products and after-sales services
Mining as an industry underwent dramatic changes in medieval Europe. The mining industry in the early Middle Ages was mainly focused on the extraction of copper and iron. Other precious metals were also used, mainly for gilding or coinage. Initially, many metals were obtained through open-pit mining, and ore was primarily extracted from shallow depths, rather than through deep mine shafts. Around the 14th century, the growing use of weapons, armour, stirrups, and horseshoes greatly increased the demand for iron. Medieval knights, for example, were often laden with up to 100 pounds (45kg) of plate or chain link armour in addition to swords, lances and other weapons. The overwhelming dependency on iron for military purposes spurred iron production and extraction processes
Biasanya jenis karet sintesis SBR ini sering digunakan untuk roda, mounting dan conveyor belt 2 NBR (Butadiene Nitrile Rubber) Jenis karet sintesis ini tahan terhadap minyak dan oli sehingga sering digunakan sebagai bahan pembuatan seal mesin Selain itu, NBR juga merupakan standar material untuk pembuatan ORing 3
The two main methods of recycling iron from iron ore tailings are magnetizing roasting and direct reduction. Magnetizing roasting uses temperatures between 700 and 900C for a time of under 1 hour to produce an iron concentrate (Fe3O4) to be used for iron smelting. For magnetizing roasting it is important to have a reducing atmosphere to prevent oxidization and the formation of Fe2O3 because it is harder to separate as it is less magnetic. Direct reduction uses hotter temperatures of over 1000C and longer times of 25 hours. Direct reduction is used to produce sponge iron (Fe) to be used for steel making. Direct reduction requires more energy as the temperatures are higher and the time is longer and it requires more reducing agent than magnetizing roasting.
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