CN1493520A - Method of purifying soil shaped graphite - Google Patents
Method of purifying soil shaped graphite Download PDFInfo
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- CN1493520A CN1493520A CNA021397341A CN02139734A CN1493520A CN 1493520 A CN1493520 A CN 1493520A CN A021397341 A CNA021397341 A CN A021397341A CN 02139734 A CN02139734 A CN 02139734A CN 1493520 A CN1493520 A CN 1493520A
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Abstract
A process for purifying the earthy graphite includes wrapping earthy graphite by insulating material for isolating from air, spreading insulating material on the bottom of Acheson furnace, loading the wrapped earthy graphite in the furnace, heating to 1600-3000 deg.C, holding the temp for 0.5-12 hr, and cooling. Its advantages are high purity and no environmental pollution.
Description
Technical field:
The present invention relates to the method for purification of amorphous graphite.
Background technology:
Amorphous graphite claims amorphous graphite or aphanitic graphite or micro crystal graphite again.Its ore purity is than crystalline flake graphite ore purity height, but very difficult further purification.This makes its application be subjected to very big restriction.Amorphous graphite has the different characteristics of other graphite again simultaneously.These characteristics make highly purified amorphous graphite in some field, particularly high-tech area special purposes be arranged.At present, the purification of amorphous graphite mainly is a chemical process, but some method cost height, and some difficult treatment to acid ﹠ alkali liquid, environmental pollution are heavier, and also are difficult to satisfactory to the raising of amorphous graphite purity.
Summary of the invention:
Purpose of the present invention aims to provide that a kind of technology is simple, and purification purity is high, has the amorphous graphite method of purification of good environment protecting.
Processing step of the present invention is: will be through the pretreated amorphous graphite raw material acheson graphite electric furnace of packing into, during shove charge, earlier with the good furnace bottom of lagging material pad, the electric furnace of again amorphous graphite being packed into, form combustion chamber, combustion chamber is wrapped with lagging material, and isolated contacts with air, in stove intensification 10-60 hour, when temperature in the stove is between 1600-3000 ℃ behind the design temperature, and be incubated 0.5-12 hour, then cooling is come out of the stove.
Temperature is a 2300-2600 ℃ of design temperature in the preferred stove.
Described pretreated amorphous graphite is meant before shove charge the graphite raw ore is advanced pulverizing, screening or moulding, drying.
Described screening is selected suitable granularity with the raw material of fragmentation.
Described moulding is to be pressed into granular, spherical with shaper raw material or geometrical shape such as square brick shape.
Wooden with carbonization after meeting the carbon materials that hardens behind the high temperature or meeting high temperature between the amorphous graphite of screening and lagging material, bamboo lumber separately, amorphous graphite and lagging material batch mixing when preventing to come out of the stove, the purity of reduction product.
The moulding amorphous graphite then is the electric furnace formation combustion chamber of directly packing into, and its external parcel lagging material also can reach the effect of batch mixing when preventing to come out of the stove.
Described cooling is that graphite oxygen barrier in stove of will purify is cooled to the temperature that can come out of the stove, promptly comes out of the stove under 30-100 ℃ condition.
Technology of the present invention is simple, power to the acheson graphite electric furnace by transformation commutation supply voltage device, the joule heating that utilizes the stove internal resistance to produce improves temperature in the stove, require temperature in the stove is brought up to 1600-3000 ℃ according to the product different purity, at this moment the impurity in the amorphous graphite can reach the good result of purification graphite owing to high-temperature gasification volatilizees away.When rising to 950 ℃ when temperature, most of fugitive constituent has just volatilized away.And for example the boiling point of magnesium is 1108 ℃, and the boiling point of calcium is 1484 ℃, and the boiling point of aluminium is 2057 ℃.Their oxide compound has just volatilized away under the condition of high temperature after being become metal by carbon reduction.Some can not with carbon bonded elemental metals or compound, if dispersity is big, can direct boiling discharge, as copper etc.In the present invention by pre-treatment to raw material, can make refining effect better, in addition, more environmental protection of technology of the present invention, its fixed carbon content of graphite of handling purification through the present invention can obtain bigger raising on the basis of its raw material, evidence can reach more than 99.6%, can greatly enrich the range of application of amorphous graphite.This technology not only makes the purity of amorphous graphite be greatly improved, and gives amorphous graphite some new advantageous properties.
Embodiment:
Embodiment 1:
Earlier be that 88% amorphous graphite raw material is crushed to below 50 millimeters with fixed carbon content, then the raw material of fragmentation being sieved granularity is the 1-50 millimeter, carries out drying again.With the dried raw material acheson graphite electric furnace of packing into, during shove charge,, form combustion chamber with amorphous graphite more earlier with the good furnace bottom of lagging material pad, and in the black periphery of earthy stone with meeting the carbon materials refinery coke parcel that hardens behind the high temperature, completely cut off with lagging material parcel and air then.Because batch mixing phenomenon when the effect of refinery coke can prevent to come out of the stove effectively.Next heat up, furnace high-temperature is to be powered to the acheson graphite electric furnace by transformation commutation supply voltage device, and the joule heating that utilizes the stove internal resistance to produce improves temperature in the stove.Heated up 12 hours in the stove, temperature is brought up to 1800 ℃ in stove, and stablizes 1 hour, and the impurity in the amorphous graphite can be owing to high-temperature gasification volatilizees away.Then cool off, amorphous graphite raw material oxygen barrier in stove of having purified is cooled to 80 ℃ after, come out of the stove.Classification again will be distinguished by granularity or purity through the amorphous graphite raw material of purifying.At last, pack.The fixed carbon content of finished product can reach 92.38%.
Embodiment 2:
Earlier be that 80% amorphous graphite raw material is crushed to below 50 millimeters with fixed carbon content, then the raw material of fragmentation being sieved granularity is the 1-30 millimeter, carries out drying again.With the dried raw material acheson graphite electric furnace of packing into, during shove charge,, form combustion chamber with amorphous graphite more earlier with the good furnace bottom of lagging material pad, and in the black periphery of earthy stone with meeting the carbon materials refinery coke parcel that hardens behind the high temperature, completely cut off with lagging material parcel and air then.Simultaneously because the effect of refinery coke batch mixing phenomenon can prevent to come out of the stove effectively the time.Next heat up, furnace high-temperature is to be powered to the acheson graphite electric furnace by transformation commutation supply voltage device, and the joule heating that utilizes the stove internal resistance to produce improves temperature in the stove.Heated up 30 hours in the stove, temperature is brought up to 2100 ℃ in stove, and stablizes 8 hours, and the impurity in the amorphous graphite can be owing to high-temperature gasification volatilizees away.Then cool off, amorphous graphite raw material oxygen barrier in stove of having purified is cooled to 60 ℃ after, come out of the stove.Classification again will be distinguished by granularity or purity through the amorphous graphite raw material of purifying.At last, pack.The fixed carbon content of finished product can reach 88.76%.
Embodiment 3:
Earlier be that 88% amorphous graphite raw material is crushed to below 50 millimeters with fixed carbon content, then the raw material of fragmentation being sieved granularity is the 5-30 millimeter, carries out drying again.With the dried raw material acheson graphite electric furnace of packing into, during shove charge,, form combustion chamber with amorphous graphite more earlier with the good furnace bottom of lagging material pad, and wooden, the bamboo lumber parcel of carbonization after chance high temperature is used in the black periphery of earthy stone, completely cut off with lagging material parcel and air then.Next heat up, furnace high-temperature is to be powered to the acheson graphite electric furnace by transformation commutation supply voltage device, and the joule heating that utilizes the stove internal resistance to produce improves temperature in the stove.Heated up 40 hours in the stove, temperature is brought up to 2300 ℃ in stove, and stablizes 4 hours, and the impurity in the amorphous graphite can be owing to high-temperature gasification volatilizees away.Then cool off, amorphous graphite raw material oxygen barrier in stove of having purified is cooled to 60 ℃ after, come out of the stove.Classification again will be distinguished by granularity or purity through the amorphous graphite raw material of purifying.At last, pack.The fixed carbon content of finished product can reach 97.41%.
Embodiment 4:
Earlier be that 90% amorphous graphite raw material is crushed to below 30 millimeters with fixed carbon content, then the material screening with fragmentation is 0-3 millimeter and 3-30 millimeter to granularity, and the former is pressed into the square brick shape by press and carries out drying again.Earlier with the good furnace bottom of lagging material pad, with the dried raw material acheson graphite electric furnace of packing into, form combustion chamber, isolated with lagging material parcel and air then.Next heat up, furnace high-temperature is to be powered to the acheson graphite electric furnace by transformation commutation supply voltage device, and the joule heating that utilizes the stove internal resistance to produce improves temperature in the stove.Heated up 43 hours in the stove, temperature is brought up to 2500 ℃ in stove, and stablizes 5 hours, and the impurity in the amorphous graphite can be owing to high-temperature gasification volatilizees away.Then cool off, amorphous graphite raw material oxygen barrier in stove of having purified is cooled to 90 ℃ after, come out of the stove.Classification again will be distinguished by granularity or purity through the amorphous graphite raw material of purifying.At last, pack.The fixed carbon content of finished product can reach 99.64%.
Embodiment 5
Earlier be that 90% amorphous graphite raw material is crushed to below 50 millimeters with fixed carbon content, then the raw material of fragmentation being sieved granularity is the 1-30 millimeter, carries out drying again.With the dried raw material acheson graphite electric furnace of packing into, during shove charge,, form combustion chamber with amorphous graphite more earlier with the good furnace bottom of lagging material pad, and in the black periphery of earthy stone with meeting the refinery coke parcel that hardens behind the high temperature, completely cut off with lagging material parcel and air then.Next heat up, furnace high-temperature is to be powered to the acheson graphite electric furnace by transformation commutation supply voltage device, and the joule heating that utilizes the stove internal resistance to produce improves temperature in the stove.Heated up 46 hours in the stove, temperature is brought up to 2700 ℃ in stove, and stablizes 6 hours, and the impurity in the amorphous graphite can be owing to high-temperature gasification volatilizees away.Then cool off, amorphous graphite raw material oxygen barrier in stove of having purified is cooled to 60 ℃ after, come out of the stove.Classification again will be distinguished by granularity or purity through the amorphous graphite raw material of purifying.At last, pack.The fixed carbon content of finished product can reach 99.9%.
Claims (7)
1, a kind of method of the amorphous graphite of purifying, processing step is: will be through the pretreated amorphous graphite raw material acheson graphite electric furnace of packing into, during shove charge, earlier with the good furnace bottom of lagging material pad, the electric furnace of again amorphous graphite being packed into forms combustion chamber, and combustion chamber is wrapped with lagging material, and isolated contact with air, in stove intensification 10-60 hour, when temperature in the stove is between 1600-3000 ℃ behind the design temperature, and insulation 0.5-12 hour, then cooling is come out of the stove.
2, temperature is a 2300-2600 ℃ of design temperature in the method for a kind of amorphous graphite of purifying according to claim 1, stove.
3, the method for a kind of amorphous graphite of purifying according to claim 1 and 2, described pretreated amorphous graphite is meant before shove charge the graphite raw ore is advanced pulverizing, screening or moulding, drying.
4, the method for a kind of amorphous graphite of purifying according to claim 3, wooden with carbonization after meeting the carbon materials that hardens behind the high temperature or meeting high temperature between the amorphous graphite of screening and lagging material, bamboo lumber separates, batch mixing when preventing to come out of the stove.
5, the method for a kind of amorphous graphite of purifying according to claim 3, moulding amorphous graphite then are batch mixings when directly wrapping up lagging material and just can prevent to come out of the stove.
6, the method for a kind of amorphous graphite of purifying according to claim 3, described moulding are to be pressed into granular, spherical with shaper raw material or geometrical shape such as square brick shape.
7, the method for a kind of amorphous graphite of purifying according to claim 1, described cooling are that graphite oxygen barrier in stove of will purify is cooled to the temperature that can come out of the stove, promptly come out of the stove under 30-100 ℃ condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021397341A CN1493520A (en) | 2002-10-31 | 2002-10-31 | Method of purifying soil shaped graphite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021397341A CN1493520A (en) | 2002-10-31 | 2002-10-31 | Method of purifying soil shaped graphite |
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| CN1493520A true CN1493520A (en) | 2004-05-05 |
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| CNA021397341A Pending CN1493520A (en) | 2002-10-31 | 2002-10-31 | Method of purifying soil shaped graphite |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100390053C (en) * | 2004-07-28 | 2008-05-28 | 汤世伟 | Micro crystal graphite purifying method |
| CN100408475C (en) * | 2006-10-31 | 2008-08-06 | 锦州新世纪石英玻璃有限公司 | Production process of solar energy grade polysilicon |
| CN108069422A (en) * | 2017-12-25 | 2018-05-25 | 凯盛石墨碳材料有限公司 | A kind of method of graphite purification |
-
2002
- 2002-10-31 CN CNA021397341A patent/CN1493520A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100390053C (en) * | 2004-07-28 | 2008-05-28 | 汤世伟 | Micro crystal graphite purifying method |
| CN100408475C (en) * | 2006-10-31 | 2008-08-06 | 锦州新世纪石英玻璃有限公司 | Production process of solar energy grade polysilicon |
| CN108069422A (en) * | 2017-12-25 | 2018-05-25 | 凯盛石墨碳材料有限公司 | A kind of method of graphite purification |
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