Magnesia

Magnesia-calcium sand is made of high-quality dolomite (impurity content <1%) and magnesite raw materials, which are fired at high temperature with light firing ingredients and pressure ball. The ratio of Mg0/CaO is selected according to different needs for the production of shaped unshaped magnesia-calcium refractories .

Purpose:

①Spherical sand series are used in the production of various indeterminate refractory materials, and are mostly used in steel plants, steelmaking and ironmaking, slag making, ramming materials, magnesia-calcium bricks, and manufacturing materials.

②The mineral powder series are used as materials for glass magnesium boards, packaging boxes, asbestos tiles, mobile homes, petrochemicals, fertilizers, coatings, and building materials.

Magnesia dolomite calcium sand is made by carefully selecting magnesite dolomite and calcining at high temperature. The temperature reaches 1850 degrees, of which calcium oxide:> 53% magnesium oxide:> 39% silicon oxide: 0.6-2.0% iron oxide >; 4.0% alumina <0.6% bulk density: >; 3.25

Physical and chemical indicators

Magnesia-calcium bricks are calcined in two steps, magnesia dolomite, dolomite sand and high-quality high-purity magnesia (sintered or fused), high-pressure molding, high-temperature firing, vacuum pressure impregnation of asphalt or paraffin, excellent high-temperature performance and slag resistance , It is suitable for AOD furnace, VOD furnace and other powder refining equipment, cement kiln, steelmaking converter, permanent bed bottom and ladle, etc.