Magnesium is ignited in the air, giving off dazzling light (water mist) and white solid (white smoke). Magnesium is ignited in oxygen and burns violently, giving off dazzling white light and producing white solid (white smoke). Magnesium is a metal element, and the symbol is Mg. Under standard conditions, it is a silvery white solid with metallic luster. It is insoluble in water and lye, but soluble in acid. It has certain ductility, heat dissipation and strong reducibility. It can react with boiling water to release hydrogen. In vinegar, the change is that bubbles float on the vinegar surface and gradually disappear.
Magnesium metal is the lightest metal that human beings can make, and it has existed in the air for a long time. It is usually manufactured by electrolysis or silicon reduction in industry. Magnesium is widely used in automobile, aerospace, aviation, casting, chemical electronics, communication, instrumentation, machinery manufacturing, transportation, energy storage materials, architectural decoration, ductile iron, desulfurizer, Grignard reagent, fireworks, military signal flares and magnesium alloys, and is a cathodic protection and corrosion protection material of magnesium.
chemical property
1, reaction with nonmetallic simple substance: 2Mg+O2= ignition =2MgO3Mg+N2=Mg3N2.
2. Reaction with water: Mg+2H2O= heating =Mg(OH)2+H2.
3. Reaction with acid: Mg+2HCl=MgCl2+H2.
4. Reaction with oxides: 2Mg+CO2= ignition = 2 mgo+c.
Use of magnesium bars
Used to make fireworks and flares. Used as reducing agent to make flash powder and lead alloy, as desulfurizing agent and purifying agent in metallurgy, as dehydrating agent in organic synthesis, or directly using magnesium powder to prepare magnesium organic compounds. Especially in recent years, magnesium powder is more and more used in spraying and anti-corrosion industries, as well as in die casting of monocrystalline silicon, polycrystalline silicon and metallurgical powder.
Safety of magnesium belt
Flammable when wet. Hazard code: GB4.3 class 430 12. UNN 0 14 18； IMDGCODE4353 page 4353, category 4.3. Packed in iron drums, aluminum drums or woven bags, lined with polyethylene plastic bags, tightly sealed. Aluminum drums or iron drums should be firmly sealed. The inner surface of the black iron drum should be coated with aluminum powder, and the outer surface should be painted. Woven bags should be durable and antistatic.
The package is marked with the words "Flammable" and "Moisture-proof". It should be stored in a cool, ventilated and dry warehouse. Do not mix with inorganic acids and flammable materials. During transportation, it should be rain-proof and sun-proof, and the means of transportation should be anti-static, and kindling is not allowed to approach. Handle with care when loading and unloading, and collision is strictly prohibited to prevent packaging damage. Magnesium powder dust can cause dyspnea, chest pain, cough, diffuse pulmonary interstitial fibrosis and emphysema.
Production personnel should wear work clothes, masks and other labor protection articles to protect respiratory organs and skin. The equipment should be sealed and the production workshop should be well ventilated. In case of fire, it is forbidden to put out the fire with water, foam and carbon dioxide, but dry sand can be used to put out the fire. Protect your eyes and skin during rescue to avoid flying particles burning your body and magnesium light burning your eyesight.