Time:1/12/2019 8:07:01 AMauthor:source:
Application of rare earth neodymium iron boron and neodymium iron boron strong magnetic filter
Rare earths are the lanthanides in the periodic table of the chemical elements—La, Ce, Pr, Nd, Pm, Sm, Eu, Gd. , Tb, Dy, Ho, Er, Tm, Yb, Lu, and two elements closely related to the 15 elements of the tether - 17 elements of (Sc) and (Y), called Rare Earth. Referred to as rare earth (RE or R).
The rare earth element was originally discovered from the rare minerals produced in Sweden. The "earth" is a substance that is insoluble in water according to the custom of the time, so it is called rare earth.
According to the electronic layer structure and physicochemical properties of rare earth elements, and their symbiosis in minerals and different ionic radii can produce different properties, seventeen rare earth elements are usually divided into two groups.
The sputum group or the sputum group is named because the rare earth mixture obtained by separation of minerals is often named after strontium or barium.
Main physical and chemical properties of rare earth elements
Rare earth elements are typical metal elements. Their metal activity is second only to alkali metal and alkaline earth metal elements, and is more active than other metal elements. Among the 17 rare earth elements, arranged in a lively order of metals, increasing from and decreasing from element is the most active. Rare earth elements form chemically stable oxides, halides, and sulfides. Rare earth elements can react with nitrogen, hydrogen, carbon and phosphorus, and are easily soluble in hydrochloric acid, sulfuric acid and nitric acid.
The rare earth is easy to combine with elements such as oxygen, sulfur and lead to form a compound having a high melting point. Therefore, the addition of rare earth in molten steel can serve to purify steel. Since the metal atomic radius of the rare earth element is larger than the atomic radius of the iron, it is easy to fill in the crystal grains and defects, and a film capable of hindering the growth of the crystal grains is formed, thereby refining the crystal grains and improving the properties of the steel.
The rare earth element has an unfilled 4f electron layer structure and thus produces a wide variety of electronic energy levels. Therefore, rare earth can be used as an excellent fluorescent, laser and electric light source material as well as colored glass and ceramic glaze.
The rare earth ions form a combination with a hydroxyl group, an azo group or a sulfonic acid group, so that the rare earth is widely used in the printing and dyeing industry. Some rare earth elements have the characteristics of large neutron capture cross-sectional areas, such as ruthenium, osmium, iridium, osmium and iridium, which can be used as control materials and moderators for atomic energy reactors. The neutron capture cross-sectional area of sputum and sputum can be used as a diluent for reactor fuel.
Rare earths have the properties of trace elements, which can promote the seed germination of crops, promote root growth and promote photosynthesis of plants.
Strong magnetic line filters are mainly used in chemical, petroleum, pharmaceutical, automotive, light industry, food, mineral processing, water treatment, electroplating, metallurgy, dyes, textiles, and other related industries.
The strong magnetic line filter removes large particles of suspended solids in the water, thereby reducing the SDI value of the water and meeting the water quality requirements for deep purification. The device has the advantages of low cost, low operating cost and simple operation; the filter material is backwashed, can be used multiple times, and the filter material has a long service life.
Strong magnetic pipeline filter properties are basically weak corrosive, corrosive, low temperature materials, high hygienic requirements and so on.
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