Preparation method of modified sodium silicate-bonded sand
A technology of glass sand and modified water, which is applied in the direction of manufacturing tools, casting molding equipment, metal processing equipment, etc., can solve the problems of low strength of water glass sand, easy cracks, and difficult cleaning of falling sand, so as to reduce the labor intensity of cleaning , save cleaning costs, and improve the strength of the sand mold
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Embodiment 1
[0014] A preparation method of modified water glass sand, wherein the modified water glass sand is composed of the following raw materials in parts by weight: 35 parts of quartz sand, 10 parts of water glass, 6 parts of clay, 12 parts of gypsum, and 3 parts of fluorinated graphite powder , 5 parts of nano-calcium carbonate, 3 parts of reinforcing agent, 3 parts of disintegrating agent, 12 parts of resin powder, 3 parts of sodium tripolyphosphate, 5 parts of active silicon micropowder and concentration are 20 parts of sodium polyacrylate solution of 25%; Described preparation The method includes the following steps:
[0015] (1) The quartz sand in the formula is subjected to magnetic separation at 300-400mT, and then the quartz sand of 0.2-0.4mm is screened out by screening equipment;
[0016] (2) immerse the quartz sand of step (1) into the sodium polyacrylate solution with a concentration of 25% and stir for more than 1 hour, and remove the solution by filtration;
[0017] (...
Embodiment 2
[0020] A preparation method of modified water glass sand, wherein the modified water glass sand is composed of the following raw materials in parts by weight: 55 parts of quartz sand, 20 parts of water glass, 12 parts of clay, 30 parts of gypsum, and 8 parts of fluorinated graphite powder , 15 parts of nano calcium carbonate, 8 parts of reinforcing agent, 8 parts of disintegrating agent, 20 parts of resin powder, 8 parts of sodium tripolyphosphate, 12 parts of active silicon micropowder and concentration are 30 parts of sodium polyacrylate solution of 25%; The method includes the following steps:
[0021] (1) The quartz sand in the formula is subjected to magnetic separation at 300-400mT, and then the quartz sand of 0.2-0.4mm is screened out by screening equipment;
[0022] (2) immerse the quartz sand of step (1) into the sodium polyacrylate solution with a concentration of 25% and stir for more than 1 hour, and remove the solution by filtration;
[0023] (3) Calcining the qu...
Embodiment 3
[0026] A preparation method of modified water glass sand, wherein the modified water glass sand is composed of the following raw materials in parts by weight: 45 parts of quartz sand, 15 parts of water glass, 9 parts of clay, 20 parts of gypsum, and 5 parts of fluorinated graphite powder , 10 parts of nano-calcium carbonate, 5.5 parts of reinforcing agent, 5.5 parts of dispersing agent, 16 parts of resin powder, 5 parts of sodium tripolyphosphate, 8 parts of active silicon micropowder and concentration are 25 parts of sodium polyacrylate solution of 25%; The method includes the following steps:
[0027] (1) The quartz sand in the formula is subjected to magnetic separation at 300-400mT, and then the quartz sand of 0.2-0.4mm is screened out by screening equipment;
[0028] (2) immerse the quartz sand of step (1) into the sodium polyacrylate solution with a concentration of 25% and stir for more than 1 hour, and remove the solution by filtration;
[0029] (3) Calcining the quar...
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