Light burned magnesia powder is an important refractory material. Light burned magnesia powder is a raw material with medium alkalinity and chemical activity. In addition to being used as a refractory and cementing material, light burned magnesia balls are 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 magnesia 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 sub-balls, and carbon-containing calcium-containing light-burned magnesia powder balls. Light burnt magnesia powder, referred to as light burnt magnesia powder, is a kind of activated magnesia 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, and the periclase crystal is very small.
The preparation of light burnt magnesia ball is to add 80% light burnt magnesia powder into 2O water, put it into a milling machine for rolling, stirring, and mixing for 15 to 20 minutes to form a mixture, and then send it to the ball press through a belt conveyor to prepare the product. Then stack them. The finished product of light-burned magnesia ball is ready for sale after being dried in the shade for 48 hours and forming strength.
The necessity of improving the production process of light burnt magnesia balls
After many years of production practice in our factory, the light-burned magnesia ball products are produced according to the above preparation process, and the quality of the products has the following problems.
1) The sphere is loose. The density is small, the strength is low, and it is easily broken. Especially during loading and unloading, transportation, squeezing and falling, the sphere is prone to breakage.
2) Low ball formation rate. After the raw material is processed by the ball press, half is the product, and the other half is the powder. The powder needs to be manually returned to the press to continue processing.
3) The user is not satisfied. The products sold contain 20%-35% of small pieces and powders and other mixed materials, and users have repeatedly raised objections to this.
4) The shape of the sphere is not complete. Some are half a ball, some are a third ball, and some have missing corners, have different shapes, have a matte surface, and have a poor appearance.