CN102502600A - Pyrographite tube and method for producing same - Google Patents
Pyrographite tube and method for producing same Download PDFInfo
- Publication number
- CN102502600A CN102502600A CN2011103309314A CN201110330931A CN102502600A CN 102502600 A CN102502600 A CN 102502600A CN 2011103309314 A CN2011103309314 A CN 2011103309314A CN 201110330931 A CN201110330931 A CN 201110330931A CN 102502600 A CN102502600 A CN 102502600A
- Authority
- CN
- China
- Prior art keywords
- pyrographite
- tube
- pitch
- tubing
- calcium carbonate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title abstract 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 31
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 25
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 13
- 238000001125 extrusion Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 10
- 238000005087 graphitization Methods 0.000 claims description 9
- 238000007598 dipping method Methods 0.000 claims description 5
- 239000007858 starting material Substances 0.000 claims description 5
- 229920001187 thermosetting polymer Polymers 0.000 claims description 5
- 238000001354 calcination Methods 0.000 claims description 3
- 238000003763 carbonization Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 230000008595 infiltration Effects 0.000 claims description 2
- 238000001764 infiltration Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 239000011342 resin composition Substances 0.000 claims description 2
- 239000010439 graphite Substances 0.000 abstract description 10
- 229910002804 graphite Inorganic materials 0.000 abstract description 10
- 238000005452 bending Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 239000010426 asphalt Substances 0.000 abstract 2
- 239000006229 carbon black Substances 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 229920002521 macromolecule Polymers 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Ceramic Products (AREA)
Abstract
The invention discloses a pyrographite tube and a method for producing the same. The pyrographite tube comprises a tube wall made of asphalt, graphite powder, nano calcium carbonate and carbon black powder, and asphalt which enables the tube wall to be completely impermeable is infiltrated in the materials of the tube wall. The method for producing the pyrographite tube includes steps of extrusion forming, roasting at high temperature, graphitizing at high temperature, impregnating, treating at medium temperature and the like. Tensile strength, compressive strength, bending strength and the like of the pyrographite tube are all approximate to those of impregnated impermeable graphite, and coefficient of linear expansion of the pyrographite tube is only 1/6 of that of normal graphite. In addition, heat transferring performance and corrosion resistance of the pyrographite tube are superior to those of the normal graphite, and the pyrographite tube is suitable for harsh operating conditions. The method for producing the pyrographite tube is simple and feasible.
Description
Technical field:
The present invention relates to a kind of tubing, mainly is heat exchange tubing and working method thereof that the tube-type graphite heat-exchange equipment under the harsh working condition of a kind of chemical industry uses.
Background technology:
Existing tube-type graphite heat-exchange equipment; Its heat exchange tubing adopts the die mould Resbon tube usually; Its heat conductivility, corrosion resistance nature, heat resistance all exist significant limitation, particularly coefficient of linear expansion to be higher than far away and are used to make the tube sheet that is connected with heat transfer tube, the impregnated graphite of floating head, so the two expanded by heating degree is seriously inconsistent; Cause connection fracture, breakage between the two, finally cause the damage of whole equipment and even scrap.
Summary of the invention:
The object of the present invention is to provide a kind of coefficient of linear expansion low pyrographite pipe and working method thereof.
Technical solution of the present invention is:
A kind of pyrographite pipe is characterized in that: comprise that by pitch, Graphite Powder 99, nanometer grade calcium carbonate, carbon powder be the tube wall that raw material is processed, infiltration makes tube wall have complete impervious pitch, thermosetting resin composition in the material of above-mentioned tube wall.
The part by weight of each starting material component is: pitch: Graphite Powder 99: nanometer grade calcium carbonate: carbon powder=45 ~ 55:45 ~ 55:0.3 ~ 0.8:0.3 ~ 0.8.
The part by weight of each starting material component is: pitch: Graphite Powder 99: nanometer grade calcium carbonate: carbon powder=49.5:49.5:0.5:0.5.
A kind of working method of pyrographite pipe is characterized in that: comprise the following steps: successively
(1) extrusion molding: pitch, Graphite Powder 99, nanometer grade calcium carbonate, carbon powder are mixed the back extrusion molding;
(2) high-temperature roasting:, make the pitch carbonization with the tubing of moulding calcination process 20～30 days under 1700～1900 ℃ of hot conditionss;
(3) high temperature graphitization: the tubing that roasting is finished carried out graphitization processing 15 ~ 20 days under 1800～2200 ℃ of hot conditionss;
(4) dipping: the tubing after the graphitization processing is put into the thermosetting resin dip treating, make tubing have complete opacity;
(5) temperature is handled in: above-mentioned impregnated tubing was handled 5～7 days under 290 ℃ ~ 310 ℃ conditions, obtained the finished product.
The present invention adopts the intensity of the good reinforcing property raising tubing of nano-calcium carbonate, improves flexural strength and bending elastic modulus, heat-drawn wire and the dimensional stability of tubing.Tubing can be regarded as the mixed and disorderly combination of countless a plurality of organic macromolecules, has numerous " hole " not of uniform size in the combination.The nanometer grade calcium carbonate particle has excellent " filling adequacy ", can get up with the organic macromolecule good binding, thereby can play filling-modified strengthening action preferably.
The tensile strength of product of the present invention, ultimate compression strength, bending strength, etc. all approaching with dipping type impermeable graphite, coefficient of linear expansion is merely 1/6 of common graphite pipe; Its heat transfer property, corrosion resistance nature are more more superior than common graphite pipe in addition, are suitable for comparatively harsh working condition; The working method simple possible.
Below in conjunction with embodiment the present invention is described further.
Embodiment
A kind of working method of pyrographite pipe comprises the following steps: successively
(1) extrusion molding: pitch, Graphite Powder 99, nanometer grade calcium carbonate, carbon powder are mixed the back extrusion molding; The part by weight of each starting material component is: pitch: Graphite Powder 99: nanometer grade calcium carbonate: carbon powder=45 ~ 55:45 ~ 55:0.3 ~ 0.8:0.3 ~ 0.8.(routine 40:50:0.3:0.8,49.5:49.5:0.5:0.5,55:55:0.8:0.3).
(2) high-temperature roasting:, make the pitch carbonization with the tubing of moulding calcination process 20～30 days (example 20 days, 25 days, 30 days) under 1700～1900 ℃ of (1700 ℃, 1800 ℃, 1900 ℃ of examples) hot conditionss;
(3) high temperature graphitization: the tubing that roasting is finished carried out graphitization processing 15 ~ 20 days (example 15 days, 18 days, 20 days) under 1800～2200 ℃ of (1800 ℃, 2000 ℃, 2200 ℃ of examples) hot conditionss; Make it have the good heat conduction of graphite, conductivity.
(4) dipping: the tubing after the graphitization processing is put into the dipping still, vacuumize, then suck thermosetting resin, dip treating is 2～3 times so repeatedly, makes it have complete opacity;
(5) temperature is handled in: above-mentioned impregnated tubing is handled 5～7 days (example 5 days, 6 days, 7 days) under 290 ℃ ~ 310 ℃ (290 ℃, 300 ℃, 310 ℃ of examples) conditions, obtain the finished product.
Claims (4)
1. pyrographite pipe is characterized in that: comprise that by pitch, Graphite Powder 99, nanometer grade calcium carbonate, carbon powder be the tube wall that raw material is processed, infiltration makes tube wall have complete impervious pitch, thermosetting resin composition in the material of above-mentioned tube wall.
2. pyrographite pipe according to claim 1 is characterized in that: the part by weight of each starting material component is: pitch: Graphite Powder 99: nanometer grade calcium carbonate: carbon powder=45 ~ 55:45 ~ 55:0.3 ~ 0.8:0.3 ~ 0.8.
3. pyrographite pipe according to claim 2 is characterized in that: the part by weight of each starting material component is: pitch: Graphite Powder 99: nanometer grade calcium carbonate: carbon powder=49.5:49.5:0.5:0.5.
4. the working method of the described pyrographite pipe of claim 1 is characterized in that: comprise the following steps: successively
(1) extrusion molding: pitch, Graphite Powder 99, nanometer grade calcium carbonate, carbon powder are mixed the back extrusion molding;
(2) high-temperature roasting:, make the pitch carbonization with the tubing of moulding calcination process 20～30 days under 1700～1900 ℃ of hot conditionss;
(3) high temperature graphitization: the tubing that roasting is finished carried out graphitization processing 15 ~ 20 days under 1800～2200 ℃ of hot conditionss;
(4) dipping: the tubing after the graphitization processing is put into the thermosetting resin dip treating, make tubing have complete opacity;
(5) temperature is handled in: above-mentioned impregnated tubing was handled 5～7 days under 290 ℃ ~ 310 ℃ conditions, obtained the finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103309314A CN102502600B (en) | 2011-10-27 | 2011-10-27 | Pyrographite tube and method for producing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103309314A CN102502600B (en) | 2011-10-27 | 2011-10-27 | Pyrographite tube and method for producing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102502600A true CN102502600A (en) | 2012-06-20 |
| CN102502600B CN102502600B (en) | 2013-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103309314A Active CN102502600B (en) | 2011-10-27 | 2011-10-27 | Pyrographite tube and method for producing same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102502600B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292060A (en) * | 2013-06-26 | 2013-09-11 | 南通星球石墨设备有限公司 | Graphite pipe and manufacturing method |
| CN104002460A (en) * | 2014-05-13 | 2014-08-27 | 龚孝祥 | Graphite pipe manufacturing method for eliminating extruding internal stress and microcracks |
| CN106495695A (en) * | 2016-11-04 | 2017-03-15 | 南通贝思特石墨设备有限公司 | A kind of method for improving graphite-pipe thermal conductivity |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1558131A (en) * | 2004-01-18 | 2004-12-29 | 南通星球石墨设备有限公司 | Asphalt graphite pipeline and production method thereof |
| CN101186523A (en) * | 2007-10-29 | 2008-05-28 | 南通扬子江石墨设备有限公司 | Method for producing dipping graphite tube |
-
2011
- 2011-10-27 CN CN2011103309314A patent/CN102502600B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1558131A (en) * | 2004-01-18 | 2004-12-29 | 南通星球石墨设备有限公司 | Asphalt graphite pipeline and production method thereof |
| CN101186523A (en) * | 2007-10-29 | 2008-05-28 | 南通扬子江石墨设备有限公司 | Method for producing dipping graphite tube |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292060A (en) * | 2013-06-26 | 2013-09-11 | 南通星球石墨设备有限公司 | Graphite pipe and manufacturing method |
| CN104002460A (en) * | 2014-05-13 | 2014-08-27 | 龚孝祥 | Graphite pipe manufacturing method for eliminating extruding internal stress and microcracks |
| CN106495695A (en) * | 2016-11-04 | 2017-03-15 | 南通贝思特石墨设备有限公司 | A kind of method for improving graphite-pipe thermal conductivity |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102502600B (en) | 2013-07-10 |
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| C06 | Publication | ||
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| C14 | Grant of patent or utility model | ||
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Denomination of invention: High temperature graphite tube and its production method Granted publication date: 20130710 Pledgee: Bank of Communications Co.,Ltd. Nantong Branch Pledgor: NANTONG SUNSHINE GRAPHITE EQUIPMENT TECHNOLOGY Co.,Ltd. Registration number: Y2024980000877 |