Niobium, formerly columbium, is a chemical element with the symbol Nb (formerly Cb) and atomic number 41. It is a soft, grey, ductile transition metal, which is often found in the pyrochlore mineral, the main commercial source for niobium, and columbite.
It was not until the early 20th century that niobium was first used commercially. Brazil is the leading producer of niobium and ferroniobium, an alloy of niobium and iron. Niobium is used mostly in alloys, the largest part in special steel such as that used in gas pipelines. Although alloys contain only a maximum of 0.1%, that small percentage of niobium improves the strength of the steel. Niobium is used in various superconducting materials. These superconducting alloys, also containing titanium and tin, are widely used in the superconducting magnets of MRI scanners. Other applications of niobium include its use in welding, nuclear industries, electronics, optics, numismatics and jewelry. In the last two applications, niobium's low toxicity and ability to be colored by anodization are particular advantages.
Niobium and tantalum do not occur naturally as free metals, but are essential components in a range of mineral species. The majority of these are oxide minerals; silicates of niobium and tantalum also substitute for major ions in a number of other minerals, in which they typically have low concentrations. The vast majority of the economically important species are oxides.
Extraction methods used to extract the tantalum and niobium are similar to other comparable metal occurrence. Factors that dictate the choice of extraction methods include: physical and chemical properties of mineral ore, the tonnage and grade and type, geometry and depth of field. The most common extraction methods are surface (or open) and sub- surface (or underground) mining, or a combination of both. A significant amount of niobium and tantalum are extracted by artisanal mining and small-scale.
In recent years, several advanced technologies have been developed to improve the separation of finer materials. As a leading company in mining industry, we can supply our consumers with high-tech and high quality niobium ore beneficiation equipment. Niobium ore beneficiation equipment for Brazil has lot selectivity. Our most popular products are crushing equipment, grinding equipment, sand making equipment and separating machine. For niobium ore crushing, you can choose niobium ore jaw crusher, cone crusher, impact crusher and grinding mills such as ball mill, vertical roller mill and super thin grinding mill. For niobium ore separating, you can use our magnetic separator, flotation separator or gravity separator.
The dry Magnetic Separator of CTG type is widely used in chemical, pharmaceutical, the ceramic raw materials of iron removal and the recovery of the weak magnetic minerals. This machine is specialized in dry separating in limonite, hematite, manganese ore and the machine enjoys features of small occupied area, low power, and large treatment volume.
Shanghai SBM, a professional mining equipment manufacturer, has been dedicated in mining industry for many years. We provide professional service about niobium ore mining technology and niobium mining equipment for sale Brazil. For ore crushing, you can choose our jaw crusher, impact crusher or cone crusher. All of our crushers feature with high efficiency, energy saving, easy maintenance, low operating and maintenance cost and do on. For further grinding, you can take ball mill, super thin grinding mill and vertical roller mill as options.
SBM has released the K series portable crushing and screening plants, which contain 72 models that fit various crushing work in metal mines, building aggregates and solid waste treatment fields.
High frequency screens feature aggressive vibration applied directly to the screen that allows for the highest capacity in the market.
SCM ultrafine mill has been exported to more than 130 countries used in super grinding industry.
Hammer crusher machine is developed for both dry and wet crushing of brittle, medium-hard materials for the mining, cement, coal, metallurgic materials etc.
LSX sand washing machine is mainly used for sand processing, electric pole factory, building work site and concrete dam etc.