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The content of these four isotopes in nature is extremely small, cannot bethrough the method of metallurgical mineral to extract, only can beartificially produced by high-energy physics methods (neutron bombard metalliccobalt). Of which, cobalt 60 has strong radioactivity, can be applied to theobject's internal control measure (such as equipment testing), health care(such as the chemotherapy of cancer) and tracer substances. Another three kindsof isotopes, cobalt 56, cobalt 57, cobalt 59 has weak radioactivity, there areno reports about its practical purpose. The widely existing cobalt 58 is notradioactivity, so the cobalt products in cobalt processing plant are noradioactivity. Theapplication area of cobalt is very broad due to its irreplaceable physical andchemical properties. Including rechargeable battery materials, metal powder, superhard heat-resistingcemented carbide, petrochemical catalysts, ceramic color glaze, magneticmaterials, feed additives, pharmaceuticals and other industries. Althoughcobalt is small metal, but cobalt products have been extensively used in ourdaily lives. For example: our daily lithium-ion batteries used in mobile phoneshas 5-10 grams of cobalt (Lithium ion batteries are invented in Japan in 1990,and at the beginning of this century poured into commercial production, thecobalt consumption of the current lithium-ion batteries was accounted fornearly 40% of the global consumption, which is the first major uses ofcobalt.). The body also contains trace amounts of cobalt, if lack of cobaltelement, the body will get sick, the general performance is anemia. Thewell-known vitamin B12 also contains cobalt. In additionto the cobalt that people can be used in daily life, the cobalt in theindustrial sector also has an important purpose. Cobalt powder is mainly used for preparingalloys. Cobalt-based alloy is made of cobalt and one or more of the group ofchromium, tungsten, iron, nickel. Cobalt has superior magnetic properties, hadbeen widely used in magnetic materials manufacturing, for example: speakers.Cobalt is also used as a catalyst in the petrochemical industry, as a binderused in the rubber tire industry. The cobaltconsumption of cemented carbide and super cemented carbide has been the firstmajor uses of cobalt before the invention of lithium-ion batteries, now is thesecond largest use, accounting for about 20% of cobalt consumption. Tool steelwhich contains a certain amount of cobalt can be remarkably improved steel's wearresistance and machinability, the alloy composition of the remaining cobaltmetal carbide grains together, cobalt combined with other metal carbide grainsin the alloy composition, the alloy has a higher toughness and reducesensitivity to impact, this alloy welding in the part surface, can increase 3-7times of the parts life. Stellite cemented carbide which contain more than 50%of cobalt does not lose its original hardness even if heated to 1000;when the temperature at 1038or more, the superiority of cobalt-based alloys were revealed, particularlysuitable for manufacturing high efficiency heat engine, so the cobalt-basedalloy has the most widely applications in the aerospace technology. In aviationturbine engine structural material using 20% -27% of chromium-containing cobaltalloy, can make the material having high oxidation resistance withoutprotective coatings. In summary,although the cobalt is small metal, but its wide range of uses cannot bediscounted. Especially in the field of aerospace and other military project, itplays an irreplaceable role, so the United States, Japan, Russia and othercountries are used cobalt as an important strategic reserve material, China inrecent years has begun to set up their own cobalt reserves. With the cobaltwidely applied in the lithium-ion batteries, its special strategic positionwill be more prominent. Article Source:http://www.mhcmp.com
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