Light burned magnesia powder is a flexural, pressure resistant, and gel material. It is widely used in rubber, light burned magnesia ball plastics, wires, cable dyes, paint, glass, ceramics, chemical reagents, medicine, food additives, etc.; with science With the continuous progress and development of magnesia, the industrial use of magnesium oxide has become broader. Light burnt magnesia powder

Light burnt magnesium powder (Mgo), also known in Chinese as light burnt powder, light burnt magnesia, magnesia powder, magnesia, magnesia powder; English alias Magnesium oxide, Magnesia usta, Calcined magnesia, Magcal, Maglit. Powder, white fine powder, odorless, insoluble in water or ethanol, slightly soluble in ethylene glycol, melting point 2852℃, boiling point 3600℃, light burnt magnesia powder has a high degree of flame resistance. It can be converted into crystals after being burned at a high temperature above 1000℃, and it will become burnt magnesia (also known as magnesia) or sintered magnesia when it rises above 1500℃. Light burned magnesia powder is an alkaline oxide, which has the generality of alkaline oxide and belongs to a cementing material.　When exposed to the air, it easily absorbs water and carbon dioxide and gradually becomes basic magnesium carbonate. It combines with water to form magnesium hydroxide, which is slightly alkaline and the pH of a saturated aqueous solution is 10.3. It is soluble in acid and ammonium salt, hardly soluble in water, and its solution is alkaline. Insoluble in ethanol.

Physical and chemical indexes of light burned magnesia powder:

Light burnt magnesia powder, referred to as light burnt magnesia powder, is an activated magnesium oxide obtained by calcining magnesite, brucite and magnesium hydroxide extracted from sea water or brine at about 800-1000°C. The light burnt magnesia powder is light yellow, light brown powder, the particle size is mostly below 100 mesh, the periclase crystal is very small, the density is 3.07~3.22g/cm3, the lattice constant is large, the lattice defects are many, and the texture is crisp. It has a porous structure with great reaction activity, and is easy to undergo solid-phase reaction or sintering. It can react with water to generate Mg(OH)2 and harden, and has the ability to bond.

Choosing the calcination method and controlling the light calcination temperature are important means to obtain good activity. As the calcination temperature increases, the specific surface area of MgO decreases significantly. When the temperature is higher than 1000°C, the recrystallization rate of MgO will increase, the dispersion will drop sharply, and the activity will become poor. Using different calcination methods and calcination equipment at the same temperature is also an important factor affecting the activity of MgO. If calcined in a boiling furnace or suspension furnace, it can be quickly decomposed in an instant to obtain active light-burned magnesia powder. Using tunnel kilns and reflector kilns with large blocks, the calcination time is long, which tends to cause over-burning on the surface and raw burning inside, which will reduce the activity of light-burned magnesia powder. The use of rotary kiln to calcinate granular magnesite is somewhere in between, and the light burnt magnesia powder can also maintain better activity.

Light burned magnesia powder is a raw material with medium alkalinity and chemical activity. In addition to being used as a refractory material and cementing material, it is also used in other industrial fields. In addition, the development of converter slag splash protection technology has further expanded the application range of light burned magnesium oxide powder. At present, the technology of protecting the furnace by splashing slag mostly uses light-burned magnesia powder into balls, including light-burned magnesia powder balls, carbon-containing light-burned magnesia balls and carbon-containing calcium-containing light-burned magnesia balls.