refractory:Magnesia calcia bricks

Magnesia calcia bricks Using two-step calcining process sand Slag resistance of high-temperature performance and excellent

Magnesia calcia bricks

Mg-Ca brick with high-quality magnesite and dolomite and limestone as raw material, using two-step calcining process (light burning, fine grinding, pressure the ball, or into a blank, dead burn) system of sand, according to different needs, choose a suitable MgO / CaO ratio after molding, high temperature sintering, vacuum pressure impregnated asphalt or paraffin dip. High-temperature performance and excellent slag resistance, suitable for AOD furnace, VOD furnace device such as refining and cement kilns, steel-making converter permanent layer, bottom and steel packs. MgO-CaO Brick in the metallurgical industry, the application of more and more widely, while the MgO-CaO clinker production process will determine the performance of Mg-Ca brick. The domestic manufacturers are usually vertical kiln production of magnesium with calcium sand, using light-burned dolomite powder plus light burning powder or pressed powder lime powder sintering method of the ball. Vertical kiln production of calcium magnesium sand, impurity content increased by 1% -1.5%, and thus impurities in fuel and raw material content requirements are relatively high. Meanwhile, the vertical kiln production of MgO-CaO clinker product quality is unstable. Products due to burning more but we can not second sintering, resulting in low yields. Therefore, a tunnel kiln production of calcium magnesium sand has a very good advantage of purchasing from Liaoning, Shanxi calcined powder increases the local production of lime mixture, which has stable quality, not to increase the impurity character. In the total content of impurity is not more than 3.50% under the premise of increasing Fe2O3 content, increased the volume density of magnesium calcium and magnesium brick brick hydration resistance of calcium.

item	Indicators
	MG10	MG15	MG20		MG25	MG30
ωMgO/                 ≥                             Xmin	80 79	75 74	70 69		65 64	60 69
ωCaO/                 ≥                             Xmin	10 9	15 14	20 19		25 24	30 29
ωΣSAFa/               ≤                             Xmax	3.0g 3.3
Apparent porosity /                   ≤                             Xmax	8 9
Volume Densityg /cm3           ≥     Xmin	3.00 2.96			2.95 2.91
cold crushing strength/MPa              ≥                             Xmin	50 40
0.2MPa Refractoriness under load start/     ≥                             Xmin	1700 1680

refractory:Magnesia calcia bricks