A kind of phosphate binder modified by sorbitol, its preparation method and use method
A technology of sorbitol and phosphate, applied in the field of casting, can solve the problems of low tensile strength, poor storage stability, and insignificant improvement of sand sample strength, and achieve fast hardening and demoulding, low cost, and stable storage The effect of green protection and pollution-free
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Embodiment 1
[0052] Add 10g of sorbitol-modified phosphate binder (code A) Proportioning: 85% industrial phosphoric acid 338g, 320 mesh aluminum hydroxide powder 77.5g, boric acid 12g, silicic acid 2g, light magnesium oxide 8g, light Zinc oxide 6g, copper oxide 0.25g, nanometer yttrium oxide 0.25g, sorbitol 10g, purified water 200g;
[0053] Preparation:
[0054] 1) Add phosphoric acid into the reaction kettle, turn on the stirrer and heater, and slowly heat to 180-200°C;
[0055] 2) Add a small amount of aluminum hydroxide powder to the reaction kettle several times, and continue to stir and react until the solution in the reaction kettle is transparent;
[0056] 3) Add 50g of pure water, heat and stir until the solution temperature returns to the temperature before adding water;
[0057] 4) Add boric acid and silicic acid powder in turn, continue heating and stirring until the solution is transparent;
[0058] 5) Add 50g of pure water, heat and stir until the solution temperature return...
Embodiment 2
[0069] Add 20g of sorbitol-modified phosphate binder (code B) proportioning: 85% industrial phosphoric acid 338g, 320 mesh aluminum hydroxide powder 77.5g, boric acid 12g, silicic acid 2g, light magnesium oxide 8g, light Zinc oxide 6g, copper oxide 0.25g, nanometer yttrium oxide 0.25g, sorbitol 20g, purified water 200g;
[0070] Preparation:
[0071] 1) Add phosphoric acid into the reaction kettle, turn on the stirrer and heater, and slowly heat to 180-200°C;
[0072] 2) Add a small amount of aluminum hydroxide powder to the reaction kettle several times, and continue to stir and react until the solution in the reaction kettle is transparent;
[0073] 3) Add 50g of pure water, heat and stir until the solution temperature returns to the temperature before adding water;
[0074] 4) Add boric acid and silicic acid powder in turn, continue heating and stirring until the solution is transparent;
[0075] 5) Add 50g of pure water, heat and stir until the solution temperature retu...
Embodiment 3
[0086] Add 30g of sorbitol-modified phosphate binder (code name C) proportioning: 85% industrial phosphoric acid 338g, 320 mesh aluminum hydroxide powder 77.5g, boric acid 12g, silicic acid 2g, light magnesium oxide 8g, light Zinc oxide 6g, copper oxide 0.25g, nanometer yttrium oxide 0.25g, sorbitol 30g, purified water 200g;
[0087] Preparation:
[0088] 1) Add phosphoric acid into the reaction kettle, turn on the stirrer and heater, and slowly heat to 180-200°C;
[0089] 2) Add a small amount of aluminum hydroxide powder to the reaction kettle several times, and continue to stir and react until the solution in the reaction kettle is transparent;
[0090] 3) Add 50g of pure water, heat and stir until the solution temperature returns to the temperature before adding water;
[0091] 4) Add boric acid and silicic acid powder in turn, continue heating and stirring until the solution is transparent;
[0092] 5) Add 50g of pure water, heat and stir until the solution temperature...
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