Anti-hydration magnesium-calcium tundish coating and preparation method thereof
A magnesium-calcium tundish technology, applied in the field of refractory materials, can solve problems such as poor waterproof performance, achieve the effects of preventing bursting, improving plasticity, and improving workability
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[0049] The present invention also provides a preparation method for a hydration-resistant magnesium-calcium tundish coating, comprising the following steps:
[0050] 1) mixing the calcium raw material and dead-burned magnesia particles to obtain the first mixture;
[0051] 2) mixing the first mixture with fibers to obtain a second mixture;
[0052] 3) mixing the second mixture with the nano-binding agent and the water reducing agent to obtain the third mixture;
[0053] 4) mixing the third mixture with an organic plasticizer and an anti-explosion agent to obtain a hydration-resistant magnesium-calcium tundish coating.
[0054]According to the present invention, the mixing time of step 1) is preferably 1-3 min, more preferably 2 min; the mixing time of step 2) is preferably 0.5-1.5 min, more preferably 1 min; the mixing time of step 3) is preferably 0.5-1.5 min, more preferably 1 min ; Step 4) The mixing time is preferably 7 to 9 minutes, more preferably 8 minutes.
[0055] ...
Embodiment 1
[0066] Mix 20kg of dolomite particles and 73kg of dead-burned magnesia particles (30kg of dead-burned magnesia particles of ≤0.075mm) in a 750 planetary forced sand mixer for 2 minutes, then add 1.2kg of paper fibers and organic fibers and mix for 1 minute, then Add 3kg of nano-bonding agent, 0.5kg of sodium tripolyphosphate, 0.5kg of sodium hexametaphosphate and mix for 1 minute, finally add 0.5kg of carboxymethyl cellulose sodium and 0.2kg of metal aluminum powder and mix for 8 minutes, stir evenly and pack into bags.
Embodiment 2
[0068] Mix 20kg of calcined high-iron dolomite particles, 20kg of limestone particles and 53kg of dead-burned magnesia particles (≤0.075mm dead-burnt magnesia particles are 30kg) in a 750 planetary forced sand mixer for 2min, then add 1.2kg of hemp fiber and Mix the organic fiber for 1min, then add 5kg of nano binder, 0.75kg of sodium tripolyphosphate, 0.75kg of sodium hexametaphosphate and mix for 1min, finally add 0.05kg of sodium carboxymethyl cellulose and 0.2kg of metal aluminum powder and mix for 8min, stir evenly bag.
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