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Asphalt graphite pipeline and production method thereof
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A production method and technology of graphite tubes, applied in the direction of tubes, rigid tubes, tubes/pipe joints/fittings, etc., can solve the problems affecting the service life and quality of products, high temperature resistance, unsatisfactory ductility and corrosion resistance, etc. The effect of superior corrosion resistance, good ductility and simple production method
Inactive Publication Date: 2006-06-28
NANTONG STAR GRAPHITE EQUIP CO LTD
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Problems solved by technology
[0002] Existing pipes used for graphite heaters, evaporators, reboilers, etc., have unsatisfactory high temperature resistance, ductility, corrosion resistance, etc., which affect the service life and quality of the product
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Embodiment 1
[0020] ①Extrusion molding: mix asphalt, graphite powder, stearic acid, and carbon black powder in the weight ratio of pitch: graphite powder: stearic acid: carbon black powder = 55:30:2:6, and then extrude;
[0021] ②High temperature carbonization: the formed pipe is roasted at 1000~1300℃ (for example 1000, 1100, 1150, 1200, 1250, 1300℃) for 30~70 days (30, 40, 50, 60, 70 days) , Carbonize the pitch into shape;
[0022] ③Dipping: Put the above-mentioned carbonized pipe into phenolic resin (or furan resin, pitch) for 1-10 days (example 1, 3, 5, 7, 10 days);
[0023] ④Medium temperature treatment: Treat the pipes with the above-mentioned immersion treatment at 280℃±10℃ for 3-10 days (examples 3, 5, 7, 8, and 10 days) to obtain the product.
Embodiment 2
[0025] In step ①, the weight ratio of pitch, graphite powder, stearic acid, and carbon black powder is: pitch: graphite powder: stearic acid: carbon black powder = 61:25:3:3 (or 70:35:1:8, 65:28:3:5).
[0026] In step ③, the carbonized pipe is immersed in a mixture of phenolic resin (or furan resin) and pitch for 1-10 days (for example, 1, 3, 5, 7, 10 days), and the phenolic resin (or furan resin) is mixed with The weight ratio of the two in the asphalt mixture can be phenolic resin (or furan resin): asphalt=1:1 or 1:2, 1:3, 2:1, 3:1. The rest is the same as in Example 1.
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Technical field: [0001] The invention relates to a pipe material and a production method, mainly a pipe material and a production method used in the graphite chemical industry. Background technique: [0002] Existing pipe materials used in graphite heaters, evaporators, reboilers, etc., have unsatisfactory properties in terms of high temperature resistance, ductility, and corrosion resistance, which affect the service life and quality of the products. Summary of the invention: [0003] The purpose of the present invention is to provide a pitch graphite pipe with good heat resistance and corrosion resistance and a production method. [0004] The technical solution of the present invention is: [0005] A pitch graphite pipe, which is characterized by comprising a pipe wall made of pitch, graphite powder, stearic acid, and carbon black powder as raw materials, and the material gaps of the pipe wall are impregnated with resin and / or pitch components. [0006] The weight ratio of the...
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