CN1043031C - Microwave bulking desulfurating method for expansible graphite - Google Patents
Microwave bulking desulfurating method for expansible graphite Download PDFInfo
- Publication number
- CN1043031C CN1043031C CN96107055A CN96107055A CN1043031C CN 1043031 C CN1043031 C CN 1043031C CN 96107055 A CN96107055 A CN 96107055A CN 96107055 A CN96107055 A CN 96107055A CN 1043031 C CN1043031 C CN 1043031C
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- CN
- China
- Prior art keywords
- expanded
- expansible graphite
- microwave
- graphite
- less
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 16
- 239000010439 graphite Substances 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000005864 Sulphur Substances 0.000 claims description 7
- 238000006477 desulfuration reaction Methods 0.000 claims description 4
- 230000023556 desulfurization Effects 0.000 claims description 4
- 239000000470 constituent Substances 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 abstract description 5
- 239000011593 sulfur Substances 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 230000001007 puffing effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Landscapes
- Carbon And Carbon Compounds (AREA)
Abstract
The present invention relates to a new method for bulking expansible graphite and eliminating remnant sulfur by microwave heating, which belongs to the technical field of material science. The method uses a microwave as a heating source for bulking expansible graphite and eliminating remnant sulfur. The expansible graphite prepared by the method of the present invention has large expansion multiplying power and low remnant sulfur content. Consequently, a graphite product prepared by the expansible graphite has the advantages of good use performance and low cost.
Description
The present invention relates to a kind of employing microwave heating, make expansible black lead expanded and remove the method for residual sulphur, belong to materials science field.
The puffing technique of expansible black lead all adopts combustion gas, fuel oil or resistance wire type of heating at home and abroad, as the flat 2-14805 of Japanese Patent.The temperature rise rate of this kind mode, general big about about 100 ℃/second, if will with flakey can swollen graphite heating to 1000 ℃ swelling temperature, needed for 10 times in second.Expansible black lead is expanded under this working condition, not only effect is undesirable in desulfurization, and the easy oxidation of graphite, and the recovery rate of expanded graphite is reduced.The mode contaminate environment of combustion gas and fuel oil, the puffing furnace of resistance wire type of heating is low work-ing life, the cost height.Especially can not satisfy the high performance requirements of making required high bulking multiple, low-sulfur or super low sulfur expanded graphite of new type sealing element.
The objective of the invention is to develop a kind of employing microwave heating, make expansible black lead expanded and remove the new expansion method of residual sulphur.Microwave has stronger penetrativity, can go deep into interior of articles, and the energy transition process is carried out simultaneously in the surface and the inside of heating object.And the inside and outside heats simultaneously, and rate of heating is fast, the thermo-efficiency height.
Content of the present invention is to utilize that microwave heating is expanded as expansible black lead, the thermal source of desulfurization, and its working method comprises following each step:
(1) expansible black lead sample survey, sample granularity is the 32-50 order, and moisture content is less than 10%, and fugitive constituent is less than 14%, and sulphur content is less than 2.5%, and ash is less than 1%.
(2) carry out expanded, the desulfurization of expansible black lead with microwave heating, microwave power is 1.0-2.5KW, and the microwave bulking time is 3-18 second.
(3) collect expanded graphite.
The expanded multiple height of expanded graphite that utilizes method of the present invention to make, residual sulphur is very low.Utilize the about heat hot simultaneously loss of microwave heating source little, utilization of power is abundant, energy efficient.And the connection power supply just produces alternating electric field, heating immediately; Stop heating once cutting off the power supply; Instantaneous Control be can carry out easily, particularly currently microcomputer automatic control and operation utilized.The graphite product that the expanded graphite that makes is in this way made has good durability performance and sealing property, and improve equipment life, and product cost reduces.
Be embodiments of the invention below.The expansible black lead that 5099 crystalline flake graphites that adopt the Inner Mongol to produce in example are processed into, its sulphur content is 2.4%, and moisture content is 1%, and ash is 0.5%, fugitive constituent 11%, granularity is 60 orders.
The relation of table 1 microwave power, expanded time and expansion rate (%)
| 3s | 6s | 9s | 12s | 15s | 18s | |
| 1.0KW | 8.0 | 10.2 | 20.7 | 27.2 | 39.2 | 44.3 |
| 1.5KW | 41.2 | 53.9 | 51.0 | 46.9 | 56.7 | 55.3 |
| 2.0KW | 43.7 | 60.2 | 56.9 | 53.9 | 59.8 | 71.3 |
| 2.5KW | 55.0 | 60.0 | 62.5 | 63.3 | 71.9 | 72.8 |
The relation of table 2 microwave power, expanded time and expanded multiple
| 3s | 6s | 9s | 12s | 15s | 18s | |
| 1.0KW | 150 | 180 | 180 | 200 | 160 | 140 |
| 1.5KW | 170 | 190 | 190 | 190 | 180 | 160 |
| 2.0KW | 180 | 220 | 230 | 200 | 180 | 180 |
| 2.5KW | 200 | 200 | 190 | 190 | 190 | 180 |
The relation of table 3 microwave power, expanded time and sulphur content (%)
| 3s | 6s | 9s | 12s | 15s | 18s | |
| 1.0KW | 0.31 | 0.27 | 0.24 | 0.25 | 0.23 | 0.21 |
| 1.5KW | 0.23 | 0.22 | 0.26 | 0.27 | 0.16 | 0.13 |
| 2.0KW | 0.14 | 0.13 | 0.15 | 0.16 | 0.16 | 0.17 |
| 2.5KW | 0.21 | 0.22 | 0.22 | 0.23 | 0.14 | 0.15 |
Claims (2)
1, the expanded novel method of taking off of a kind of expansible black lead is characterized in that this method comprises the following steps:
(1) expansible black lead sample survey, sample granularity is the 32-50 order, and moisture content is less than 15%, and fugitive constituent is less than 14%, and sulphur content is less than 2.5%, and ash is less than 1%;
(2) carry out expanded, the desulfurization of expansible black lead with microwave heating, microwave power is 1.5-2.5KW, and the expanded time is 6-15 second;
(3) collect expanded graphite.
2. novel method as claimed in claim 1 is characterized in that wherein said microwave power is 2KW, and the expanded time is 10 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96107055A CN1043031C (en) | 1996-07-12 | 1996-07-12 | Microwave bulking desulfurating method for expansible graphite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96107055A CN1043031C (en) | 1996-07-12 | 1996-07-12 | Microwave bulking desulfurating method for expansible graphite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1139647A CN1139647A (en) | 1997-01-08 |
| CN1043031C true CN1043031C (en) | 1999-04-21 |
Family
ID=5119494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96107055A Expired - Fee Related CN1043031C (en) | 1996-07-12 | 1996-07-12 | Microwave bulking desulfurating method for expansible graphite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1043031C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100336720C (en) * | 2004-07-15 | 2007-09-12 | 同济大学 | Process for preparing nano porous graphite |
| CN102303863A (en) * | 2011-08-20 | 2012-01-04 | 山东东昀石墨科技有限公司 | Nested tube double desulfuration graphite expanding device |
| CN106430178B (en) * | 2016-11-04 | 2019-04-30 | 辽宁省地质矿产研究院有限责任公司 | A kind of microwave chemical preparation method of fine scale sulphur-free expanded graphite |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5874515A (en) * | 1981-10-30 | 1983-05-06 | Toyo Tanso Kk | Manufacture of flexible expanded graphite |
-
1996
- 1996-07-12 CN CN96107055A patent/CN1043031C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5874515A (en) * | 1981-10-30 | 1983-05-06 | Toyo Tanso Kk | Manufacture of flexible expanded graphite |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1139647A (en) | 1997-01-08 |
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| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |