the use of molybdenum

Solid lubricants in the metal – molybdenum

In a few decades ago, New Zealand, there had occurred a strange pasture: that year, farmers have planted a mixture of pasture grasses and clover. Times, and it is not good, grass grows short and small. Even a withered yellow. gold stamp mills prices

However, surprisingly, that a withered yellow in the pasture, where the grass grow as much as a particularly good from afar, as if a yellow sea of ​​green “island.” This is how it happened that farmers carefully observed, and finally found the secret: the original, in that “island” next to a molybdenum plant. Many workers seek to cut corners, and often from there through, straight to the factory door. Workers’ boots on the adhesion of many molybdenum powder. The molybdenum powder fell on the grass, the grass looks exceptionally good.

Molybdenum mine, why make grass grow is good then people after careful study, I realized that molybdenum is essential for plant growth and trace elements. Molybdenum is a piece of pasture soils, so drop a number of molybdenum ore, they see a large yield. Especially legumes and grasses, a greater need molybdenum. In the human eye pigment, also contains trace amounts of molybdenum. In vegetables, the cabbage, cabbage and other molybdenum more. Frequently eat cabbage, Chinese cabbage, the eye is very good. However, according to tests, in a corner of livestock (eg cattle, sheep) in the feed, if it contains too much molybdenum, easily lead to stomach.

Molybdenum is a silvery-white hard metal. Heavy, the proportion of l0.2. Refractory, melting point up to 2620 ℃. Ductility of pure molybdenum rich, but contain small amounts of impurities, become very brittle. The chemical properties of molybdenum is very stable and will not be hydrochloric acid, hydrofluoric acid and alkali by corrosion, but in the nitric acid, aqua regia or hot concentrated sulfuric acid is corrosive. In pure oxygen, heated to 500 ℃, molybdenum will burn into molybdenum trioxide. ultra fine quartz gold milling machine

Molybdenum, about 90% is used to make all kinds of special steel. Molybdenum steel has good flexibility, toughness and high hardness, used to make axles, armored plates, guns barrel. In a very small amount of pig iron by adding molybdenum, can greatly improve its mechanical properties. Made of molybdenum and tungsten alloys, especially good acid resistance, was used to replace the expensive platinum.

Molybdenum and sulfur compounds – molybdenum disulfide, is a dark gray powder, looks very much like graphite. If the added molybdenum disulfide lubricant, the friction can be reduced to one-third. Like the oil in the car chassis, add about 3% molybdenum disulfide, can make mileage from the 1500 kilometers to six thousand kilometers; cupola furnace blower bearings, the original use Huangyou Run slip, slide, once every two days you have to add oil, in favor of molybdenum disulfide, plus one year only, and with good results.  flotation mill for sale

Particularly valuable is that the general increase in pressure or lubricant in the rotating parts to speed, the friction increases. If you use the words of molybdenum disulfide, but it will reduce friction, so it is ideal for very close to the contact surface, compression of large and high-speed rotating machinery. If instead of butter with molybdenum disulfide lubricating motor bearings, bearing temperature can drop four to six degrees, saving 15% power. Molybdenum disulfide also has many advantages: it is chemically stable, acid, only soluble in aqua regia and hot concentrated sulfuric acid, therefore, use non-perishable; it can heat and cold, from -60-400 ℃, has been can maintain good lubrication properties.