Dashiqiao Hongkai Refractories Co., Ltd.
Contact number: +86-13841720502
Zip code: 115100
Site: Nanlou Economic Development Zone, Dashiqiao City, Liaoning Province
Office Address: Building No. 5, Fenghua Yihe Village, Dashiqiao City, 105
Depending on the abundant magnesite resources in Dashiqiao City and the advantages of convenient transportation, we are committed to the further processing and industrialization of magnesite. Our factory mainly produces lightly burned magnesia powder, lightly burned magnesia ball, heavily burned magnesia, bitter earth powder, fused magnesia, metallurgical sand and other refractory products. The products are mainly used in metallurgy, chemical industry, feed, environmental protection, medicine, fertilizer, building materials and other industries. At the same time, Raymond processing of various powders can be operated concurrently, and various physical and chemical indicators can be adjusted according to the needs of customers.
In line with the enterprise tenet of "business with morality and credit first", our factory is willing to cooperate better with customers at home and abroad, to meet the needs of our customers with high quality products and the best price, and warmly welcome to our company for negotiation and cooperation.
Light-burned magnesia powder, short for light-burned magnesia powder, is a kind of active magnesia obtained by calcining magnesite, brucite and magnesium hydroxide extracted from seawater or brine at about 800-1000 C. Light-burned magnesia powder is a light yellow and light brown powder. Its particle size is mostly below 100 mesh. Its crystal density is 3.07-3.22g/cm3. It has large lattice constant, many lattice defects, brittle texture, porous structure and high reactivity. It is easy to react with water to form Mg(OH)2 and harden. It has bonding energy. Power.
Selection of calcination method and control of light-burning temperature are important means to obtain good activity. With the increase of calcination temperature, the specific surface area of MgO decreases significantly. The recrystallization rate of MgO increases, the dispersion decreases sharply and the activity decreases when the temperature is higher than 1000 C. Different calcination methods and equipment at the same temperature are also important factors affecting MgO activity. If calcined in fluidized bed furnace and suspension furnace, it can decompose rapidly in an instant, and the lightly burned magnesia powder with the greatest activity can be obtained. Using tunnel kiln and reflective kiln as large blocks, the calcination time is long, and the surface is often overburned while the interior is burned, which will reduce the activity of light-burned magnesia powder. The calcination of granular magnesite in rotary kiln is between the two conditions, and the light-burned magnesia powder can also be obtained to maintain better activity.
Light burnt magnesia powder is a kind of raw material with moderate basicity and chemical activity. It is not only used as refractory and cementitious material, but also used in other industrial fields. In addition, the development of slag splashing technology for converter protection further expands the application scope of light burning magnesia powder. At present, the slag splashing technology mostly uses light-burned magnesia powder as pellets, such as light-burned magnesia powder pellets, carbon-containing light-burned magnesia pellets and carbon-containing calcium-containing light-burned magnesia pellets.