Preparation method of anti-hydration magnesium calcium sand
A magnesia-calcium sand and hydration-resistant technology, applied in the field of magnesia-calcium sand preparation, can solve the problems of volume expansion, pulverization and damage, and achieve the effect of reducing water molecules and improving water resistance.
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example 1
[0016] Take by weighing 600g rice husk, ignite, obtain rice husk ash, the rice husk ash that will obtain is packed in the three-necked flask that has stirrer and air inlet, add 400mL mass fraction in the three-necked flask and be 60% sodium hydroxide solution, Start the agitator, feed nitrogen gas for 30min while stirring to obtain a water glass solution; adjust the pH value of the water glass solution to 6 with 200mL of hydrochloric acid with a mass fraction of 10%, to obtain a neutralized water glass solution, and neutralize the water glass solution The glass solution is stirred at 70°C with a stirrer at a speed of 200r / min to obtain superfine silica colloid; weigh 2kg of dolomite and grind it in a stone mill for 2 hours, and pass through an 80-mesh standard sieve after grinding to obtain dolomite Stone powder, put the dolomite powder into the calciner, heat up to 800°C, heat-preserve and calcinate for 3 hours, and discharge the material to obtain light-burned dolomite materi...
example 2
[0018] Take by weighing 700g rice husk, ignite, obtain rice husk ash, the rice husk ash that will obtain is packed in the three-necked flask that has stirrer and air inlet, in the three-necked flask, add 450mL mass fraction and be 60% sodium hydroxide solution, Start the stirrer, and feed nitrogen gas for 40min while stirring to obtain a water glass solution; adjust the pH value of the water glass solution to 6 with 250mL of hydrochloric acid with a mass fraction of 10%, to obtain a neutralized water glass solution. The glass solution is stirred at 75°C with a stirrer at a speed of 225r / min to obtain superfine silica colloid; weigh 2kg of dolomite and grind it in a stone mill for 2 hours, and pass through an 80-mesh standard sieve after grinding to obtain dolomite Put the dolomite powder into the calcination furnace, heat up to 850°C, keep the heat for calcination for 4 hours, and discharge the material to obtain the light-burned dolomite material; put the light-burned dolomite...
example 3
[0020] Take by weighing 800g rice husk, light, obtain rice husk ash, the rice husk ash that will obtain is packed in the three-necked flask that has stirrer and air inlet, add 500mL mass fraction in the three-necked flask and be 60% sodium hydroxide solution, Start the stirrer, and feed nitrogen gas for 45min while stirring to obtain a water glass solution; adjust the pH value of the water glass solution to 7 with 300mL of hydrochloric acid with a mass fraction of 10%, to obtain a neutralized water glass solution, and neutralize the water glass solution Stir the glass solution at 80°C with a stirrer at a speed of 250r / min to obtain superfine colloidal silica; weigh 3kg of dolomite and grind it in a stone mill for 3 hours, and pass through an 80-mesh standard sieve after grinding to obtain dolomite Put the dolomite powder into the calcination furnace, heat up to 900°C, keep the heat for calcination for 5 hours, and discharge the material to obtain light-burned dolomite material;...
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