Reclaiming treatment method for furan resin self-hardening sand
A processing method and technology of furan resin, which is applied in the cleaning/processing machinery of casting mold materials, casting molding equipment, metal processing equipment, etc., can solve the problems of prone to defects, poor hardening effect, and low recycling rate of furan resin , to achieve the effect of reducing processing cost, preventing porosity and improving removal rate
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[0011] A regeneration treatment method for furan resin self-setting sand, comprising the following steps:
[0012] (1) Break the old sand into debris with a diameter of no more than 1mm, put the broken old sand into the washing tank, and soak it in a citric acid solution with a mass fraction of 5 times the weight of the old sand and a mass fraction of 2%. Ultrasonic treatment, the ultrasonic frequency is 25-28KHz, after shaking for 10 minutes, filter, remove the filtrate, and obtain pretreated sand;
[0013] (2) Use the silica sand scrubbing machine to process the pretreated sand processed in step (1). When scrubbing, the feed concentration is 35%. Dry the scrubbed sand, crush it, pass through a 40-mesh sieve, and use a magnetic The separator performs magnetic separation treatment. During magnetic separation, the magnetic field strength is 0.75T to obtain secondary treated sand;
[0014] (3) Mix and stir the secondary treatment sand and the mixed solution at a weight ratio of...
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