Acid resistant enamel powder for pipes of air pre-heater
Key words:
Enamel porcelain glaze, inorganic pigment
Classification:
Product Description
Acid resistant enamel powder for pipes of air pre-heater
1. Material Ratio:
Pre-grinding Powder: 100
Water: 40
2. Approval Standard:
a. Appearance: Gray powder. After firing, the coating is in conformity with standard template which is smooth, glossy and with no flaw on surface.
b. Firing temperature: 850-870℃.
c. Adherence: ≧ grade 2
d. Acid assistance: ≧AA level
e. Fineness: 140 mesh. Pass 100g such powder through a 150-mesh sieve, there will be only 1-3g residue.
3. Test Method:
a. Soak the pre-grinding powder and water in proportion of 100/ 40 for 1~2 hours.
b. Pass them through 80-mesh sieve and keep the consistency at 165~170g/100ml, (1.65~1.70g/cm3).
c. Cover 150-200 micron such enamel out of a pipe which is 2mm in thickness and 25mm in diameter, fire them at 850-860℃ for 6~8 minutes.(This process could be repeated once more. )
d. Compare them with samples made from normal powder.
4. Introduction:
140~150 mesh light blue powder. Pass 100g such powder through a 150-mesh sieve, there will be only 0-0.5g residue. This product is used for enameling on corrosion-resistant pipes, which is delicate in quality and has a strong resistance against acid/ alkali. The temperature should be very well controlled when firing in order to accomplish the ideal effect.
5. Production Requirements:
All the qualified enamels should be grinded to 140-150 mesh first and mixed with eligible additives. Then make screening and packing after fineness meets the requirements.
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