Dry vibration mix for tundish and preparation method thereof
The technology of fused magnesia and binding agent is applied in the field of refractory materials, which can solve the problems of difficulty in turning over bales, pollution of molten steel, pollution of the environment, etc., and achieves the effects of good construction environment, prolonged service life and simple preparation process.
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Embodiment 1
[0029] (1) Fused magnesia (96.78% MgO, 1.25% CaO, 0.88% SiO 2 , 0.85% Fe 2 o 3 , the balance is impurities), silica fume and boric acid, aluminum hydroxide powder, calcium carbonate powder for weighing: 65% fused magnesia, 10% silica fume and boric acid, 5% aluminum hydroxide powder, 8% Calcium carbonate powder (particle size 3 ≥95%), the balance is impurities;
[0030] (2) Classify and process the fused magnesia according to the following particles: the fused magnesia with a particle size of 1~3mm accounts for 22%, the fused magnesia with a particle size of 1~0.5mm accounts for 35%, and the particle size is 0.5~ 0.088mm fused magnesia accounted for 22%, and fused magnesia with particle size <0.064mm accounted for 21%;
[0031] (3) Add silica fume, boric acid, aluminum hydroxide micropowder, and calcium carbonate powder into the mixer and mix for 25 minutes to obtain mixed powder for later use;
[0032] (4) Put the fused magnesia and mixed powder obtained in step (2) into ...
Embodiment 2
[0035] (1) Fused magnesia (96.78% MgO, 1.25% CaO, 0.88% SiO 2 , 0.85% Fe 2 o 3 , the balance is impurities), bentonite and calcium phosphate, aluminum hydroxide powder, calcium carbonate powder for weighing: 45% fused magnesia, 25% bentonite and calcium phosphate, 10% aluminum hydroxide powder, 10% Calcium carbonate powder (particle size 3 ≥ 95%), the balance is impurities;
[0036] (2) Classify and process the fused magnesia according to the following particles: the fused magnesia with a particle size of 1~3mm accounts for 36%, the fused magnesia with a particle size of 1~0.5mm accounts for 25%, and the particle size is 0.5~ The fused magnesia of 0.088mm accounts for 24%, and the fused magnesia with a particle size of <0.064mm accounts for 15%;
[0037] (3) Add bentonite, calcium phosphate, aluminum hydroxide micropowder, and calcium carbonate powder into the mixer and mix for 30 minutes to obtain mixed powder for later use;
[0038] (4) Put the fused magnesia and mixed p...
Embodiment 3
[0041] (1) Fused magnesia (96.78% MgO, 1.25% CaO, 0.88% SiO 2 , 0.85% Fe 2 o 3 , the balance is impurities), silica sol, aluminum hydroxide powder, calcium carbonate powder for weighing: 55% fused magnesia, 20% silica sol, 5% aluminum hydroxide powder, 9% calcium carbonate powder (Particle size 3 ≥95%), the balance is impurities;
[0042] (2) Classify and process the fused magnesia according to the following particles: the fused magnesia with a particle size of 1~3mm accounts for 30%, the fused magnesia with a particle size of 1~0.5mm accounts for 30%, and the particle size is 0.5~ The fused magnesia of 0.088mm accounts for 24%, and the fused magnesia with a particle size of <0.064mm accounts for 16%;
[0043] (3) Add silica sol, aluminum hydroxide micropowder, and calcium carbonate powder into the mixer and mix for 30 minutes to obtain mixed powder for later use;
[0044] (4) Put the fused magnesia and mixed powder obtained in step (2) into a forced mixer and mix for 6 mi...
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