Regeneration process of resin sand for casting
A casting resin and process technology, which is applied in the field of casting resin sand regeneration technology, can solve the problems of poor quality of recycled sand, and achieve the effects of ensuring emission, improving heat treatment effect, and low emission
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[0021] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.
[0022] Embodiments of the invention are:
[0023] A resin sand regeneration process for foundry, comprising the following steps:
[0024] 1) molding sand crushing;
[0025] 2) Flatten the old sand that has been crushed to form granules on the conveyor belt on the conveying device and transport it through a magnetic field with a magnetic field strength of 1.2T;
[0026] 3) putting the old sand treated in step 2) into a solution with a pH value of 4.7 for soaking and ultrasonic treatment;
[0027] 4) putting the old sand treated in step 3) into a roasting furnace with a temperature of 870° C. for 4 hours;
[0028] 5) After gradually lowering the temperature of the roasting furnace to 250°C, take out the old sand and soak it in the cooling liquid for rapid cooling, and then put it into the potassium hydroxide solution;
[0029] 6) Take out the old s...
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