Special PVC pipe calcium and preparation method thereof
A PVC pipe and calcite technology, applied in chemical instruments and methods, fibrous fillers, dyeing and physical treatment, etc., can solve the problems of small addition amount and poor direct application effect, and achieve large addition amount, excellent performance and reduce production. cost effect
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[0039] S1. Selection of raw materials: Select high-quality calcite with a calcium content of more than 98%.
[0040] S2. Cleaning the raw materials: cleaning the calcite and air-drying.
[0041] S3, the first coarse crushing: crush the calcite to a size of 3-5 cm, rinse with water, and dry
[0042] S4. The second crushing check: send the calcite to the hammer crusher, and crush the calcite to within 5 meshes.
[0043] S5. Ultrafine grinding: Ultrafine grinding is performed on the calcite until the fineness D97 is 4.5 μm.
[0044] S6. Continue grinding and add coupling agent: add coupling agent to the powder and grind for 10-20 minutes. The coupling agent is a magnesium coupling agent.
[0045]S7. Add lubricant and plasticizer in turn to the powder: add lubricant and plasticizer in turn, and grind for 10-30 minutes. The lubricant is magnesium stearate, and the plasticizer is 2-ethylhexyl phosphate. Calculated by weight percentage, the amount of the calcite accounts for 99....
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