Welcome to Dashiqiao Hongli Magnesium Products Factory!

中文 (1).jpg  meig.jpg


your current location : Home > News > company news

What is the preparation of active magnesium oxide by high gravity method

2020-05-11 17:26:06

With the continuous development of technology. There are many technologies for the production of magnesia, and the advantages and disadvantages are obvious. Therefore, many companies will choose the appropriate technology to produce magnesia. Among the domestic magnesium oxide production enterprises, there are many leading magnesium oxide factories and enterprises. Similarly, there are many questions about this kind of articles. Today, I will introduce to you what is the high-gravity method for preparing active magnesium oxide?

Production of light burnt magnesia

The so-called magnesium oxide is a supergravity machine as the absorption reaction device, the precursor basic magnesium carbonate is prepared by coupling NH3 and CO2 with magnesium chloride solution, and then calcined at high temperature to obtain active magnesium oxide. As the calcination temperature continues to increase, the activity The iodine adsorption value of magnesium oxide gradually decreases. When the calcination temperature drops from 500℃ to 900℃, the iodine absorption value of magnesia decreases from 197.95 mg/g to 83.5 mg/g. This is because when the calcination temperature is low, the resulting magnesium oxide The average particle size of the particles is smaller, the size of the nanoplatelets constituting the nanoparticles is smaller, the specific surface area of the particles is larger, and the corresponding adsorption capacity is larger. At the same time, due to the small average particle size of magnesium oxide particles, poor crystallinity, loose structure, certain distortion of the crystal lattice, and defects such as defects in the crystal, a certain number of polar groups will be generated. Macroscopically, they are easy to undergo physical and chemical reactions, that is, they have high activity.

As the calcination temperature increases, the size of the particles gradually increases, and the aggregation of particles gradually increases. The particles composed of nanoparticles gradually become nano-microspheres, and the size and temperature of the nano-microspheres gradually increase, resulting in a decrease in the specific surface area of the particles. . At the same time, the increase in temperature leads to the gradual improvement of lattice growth, the regular arrangement of internal particles tends to and the lattice becomes complete, resulting in a reduction in its adsorption capacity, a reduction in ball activity, a reduction in iodine adsorption value of magnesium oxide particles, and Activity and particle absorption. Therefore, as the calcination temperature increases, the adsorption capacity of MgO for iodine gradually decreases. When the calcination temperature is 500 degrees, the magnesia grain size is the smallest, and the maximum iodine absorption values are 7.4nm and 197.95mg/s, respectively.

Previous:轻质氧化镁的生产优势2020-05-11 17:25:30


contact us
Dashiqiao Hongli Magnesium

10.png  Address: Gaozhuang Village, Nanlou Economic Development Zone, Dashiqiao City, Liaoning Provin

11.png phone:+8613464785522
12.png  mailbox:852710217@qq.com



Home page                       about us

product description           news

Enterprise Honor               contact us


Service Hotline


Copyright © Dashiqiao Hongli Magnesium Products Co., Ltd.