CN1120515A - Method for crackling and dispersing and desulfurizing of expansible graphite - Google Patents
Method for crackling and dispersing and desulfurizing of expansible graphite Download PDFInfo
- Publication number
- CN1120515A CN1120515A CN 95109726 CN95109726A CN1120515A CN 1120515 A CN1120515 A CN 1120515A CN 95109726 CN95109726 CN 95109726 CN 95109726 A CN95109726 A CN 95109726A CN 1120515 A CN1120515 A CN 1120515A
- Authority
- CN
- China
- Prior art keywords
- laser beam
- black lead
- expansible black
- less
- sample
- 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
- 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 12
- 230000003009 desulfurizing effect Effects 0.000 title abstract description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000005864 Sulphur Substances 0.000 claims description 6
- 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
- 210000004027 cell Anatomy 0.000 claims 1
- 210000005056 cell body Anatomy 0.000 claims 1
- 229910052717 sulfur Inorganic materials 0.000 abstract description 3
- 239000011593 sulfur Substances 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000567 combustion gas Substances 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- 230000001007 puffing effect Effects 0.000 description 3
- 239000002956 ash Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000463 material Substances 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
Landscapes
- Carbon And Carbon Compounds (AREA)
Abstract
The process for expanding and desulfurizing expandable graphite features use of laser beam as heat source. Obtained expanded graphite has high expansion factor and low residul sulfur, so the products made of it has good utilization performance and low cost.
Description
The present invention relates to a kind of employing laser beam, 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 propose a kind of employing laser beam, make expansible black lead expanded and remove the new expansion method of residual sulphur, cancelled modes such as adopting combustion gas, fuel oil, resistance wire heating in the former method, with work-ing life of improving puffing furnace, eliminate the pollution of gas fuel to environment, improve the expanded and sweetening effectiveness of expansible black lead, for the high-performance graphite product provides high-quality, inexpensive expanded graphite.
Content of the present invention is to utilize that laser beam is expanded as expansible black lead, the thermal source of desulfurization technology, and its working method comprises following each step:
(1) expansible black lead sample survey, sample granularity is 32-50 orders, and moisture content is less than 10%, and fugitive constituent is less than 14%, and sulphur content is less than 2.5%, and ashes is less than 1%.
(2) carry out expanded, the desulfurization of expansible black lead with laser beam, laser beam power is 100-700W, and the laser beam translational speed is 50-100mm/s, and splendid attire expansible black lead sample cell volume is 350-1000mm
3
(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.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.
Table 1 is embodiments of the invention.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 50 orders, the sample cell volume is 350-1000mm
3(wherein long 200mm, wide 5mm, dark 0.355-1mm).
Table 1
Claims (2)
1, but a kind of exapnsion graphite expansion takes off novel method, it is characterized in that this method comprises the following steps:
(1) expansible black lead sample survey, sample granularity is 32-50 orders, 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 laser beam, laser beam power is 100-700W, and it is 50-100mm/s that laser beam moves fast Du, and the cell body of splendid attire expansible black lead sample is long-pending to be 350-1000mm
3
(3) collect expanded graphite.
2, novel method as claimed in claim 1 is characterized in that wherein said laser beam power is 700W, and the laser beam translational speed is 70mm/s, and the sample cell volume of expansible black lead is 700mm
3(long 200mm, wide 5mm, dark 0.7mm).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95109726A CN1043030C (en) | 1995-08-21 | 1995-08-21 | Method for crackling and dispersing and desulfurizing of expansible graphite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95109726A CN1043030C (en) | 1995-08-21 | 1995-08-21 | Method for crackling and dispersing and desulfurizing of expansible graphite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1120515A true CN1120515A (en) | 1996-04-17 |
| CN1043030C CN1043030C (en) | 1999-04-21 |
Family
ID=5077309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95109726A Expired - Fee Related CN1043030C (en) | 1995-08-21 | 1995-08-21 | Method for crackling and dispersing and desulfurizing of expansible graphite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1043030C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105244246A (en) * | 2014-07-10 | 2016-01-13 | 清华大学 | Field emission cathode and field emission device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59111907A (en) * | 1982-12-18 | 1984-06-28 | Inoue Japax Res Inc | Production of fine particles of graphite |
-
1995
- 1995-08-21 CN CN95109726A patent/CN1043030C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105244246A (en) * | 2014-07-10 | 2016-01-13 | 清华大学 | Field emission cathode and field emission device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1043030C (en) | 1999-04-21 |
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| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| 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 |