CN1161306A - Method for preparing active carbon - Google Patents
Method for preparing active carbon Download PDFInfo
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- CN1161306A CN1161306A CN 97101144 CN97101144A CN1161306A CN 1161306 A CN1161306 A CN 1161306A CN 97101144 CN97101144 CN 97101144 CN 97101144 A CN97101144 A CN 97101144A CN 1161306 A CN1161306 A CN 1161306A
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- gac
- caking coal
- coal
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- raw material
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Abstract
It is characterized by that the raw material used in the mfr. of this active carbon is composed of (wt.%) main coking coal 30-80, boric acid 0-2, borax 0-2.5, the rest is weak cohesion coal. The raw materials are mixed evenly and directly extruded into shape without adding binder, then carbonizing and activating to produce briquet active cabon.
Description
The invention belongs to a kind of manufacture method of gac.
Common Activated Carbon Production method is a kind of to be molded with mixing pinching with binding agent behind the coal abrasive dust, charing, activation.But the gac intensity that adopts more weak binding agent such as starch, paper pulp to make is relatively poor, and influences its pore texture with the gac of stronger binding agent manufacturing such as tar.Another method is that lump coal breaking is become directly charing after the particulate state of certain particle size, activation, but this single coal is difficult to reach many-sided pore texture requirement.
The objective of the invention is to make the gac produced under the prerequisite that keeps total pore volume, improve in intensity, the adsorptivity of pore volume and gac.
The present invention is achieved in that a kind of manufacture method of gac, with raw material crushing powdering, uniform mixing, compression moulding then, through charing, the briquetting gac is made in activation, it is characterized in that making the raw materials by weight preparation of gac, the strong caking coal of 30-80%, 0-2% boric acid, the 0-2.5% borax, surplus is a weakly caking coal, the caking index of described strong caking coal (G value) is 55-100, and thickness of colloidal matter layer (Y value) is 8-30mm; The caking index of described weakly caking coal (G value) is 0-45, and thickness of colloidal matter layer (Y value) is 0-6mm.Make the raw materials by weight preparation of described gac, contain the strong caking coal of 55-80%, 0.5-1% boric acid, the 0.5-1.5% borax, effect was better when surplus was weakly caking coal.
Compared with prior art, the present invention has following unusual effect:
1, its floatability is zero, and in the sink-float experiment, the settling velocity of gac is better than other water purification charcoal more than 5cm/s, also is good purifying air and the solvent recuperation charcoal simultaneously.
2, iodine sorption value is greater than 1000MG/G.
3, eliminated " bottleneck effect " of " hole is thin ", pore volume is promptly keeping under the prerequisite of total pore volume the mesopore prosperity near micropore volume in making.
4, because the present invention adds the boric acid and the borax of a small amount of ratio, can neither make main burnt matchmaker expand modification, bonding mutually, can make it keep certain cohesiveness again.
5, in carbonization process, rely on the residual cohesiveness of coking coal, weakly caking coal can be bondd, so that it forms firm skeleton structure after charing, the gac of manufacturing of the present invention intensity under pore volume distributes rational situation is good.
6, the present invention directly uses pulverized coal forming, has saved expensive binding agent, can reduce the cost of product greatly.
Be described further below in conjunction with embodiment.
Following table is 5 different proportioning raw materials embodiment.Preparation by weight percentage.
| Sequence number/composition | Strong caking coal | Weakly caking coal | Boric acid | Borax |
| ???1 | ????35 | ???64.5 | ??0 | ??0.5 |
| ???2 | ????50 | ???46.9 | ??0.6 | ??2.5 |
| ???3 | ????60 | ???38.2 | ??1.8 | ??0 |
| ???4 | ????65 | ???35 | ??0 | ??0 |
| ???5 | ????77 | ???20.4 | ??1.0 | ??1.6 |
Claims (2)
1, a kind of manufacture method of gac, raw material crushing is powdered, uniform mixing, compression moulding then is through charing, the briquetting gac is made in activation, it is characterized in that: a. makes the raw material per-cent preparation by weight of gac, the strong caking coal of 30-80%, 0-2% boric acid, 0-2.5% borax, surplus are weakly caking coal; B. the caking index of described strong caking coal (G value) is 55-100, and thickness of colloidal matter layer (Y value) is 8-30mm; The caking index of described weakly caking coal (G value) is 0-45, and thickness of colloidal matter layer (Y value) is 0-6mm.
2, the manufacture method of gac according to claim 1 is characterized in that, make the raw material composition of gac and prepare by weight percentage, and the strong caking coal of 55-80%, 0.5-1% boric acid, the 0.5-1.5% borax, effect was better when surplus was weakly caking coal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97101144 CN1161306A (en) | 1997-01-31 | 1997-01-31 | Method for preparing active carbon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97101144 CN1161306A (en) | 1997-01-31 | 1997-01-31 | Method for preparing active carbon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1161306A true CN1161306A (en) | 1997-10-08 |
Family
ID=5165537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97101144 Pending CN1161306A (en) | 1997-01-31 | 1997-01-31 | Method for preparing active carbon |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1161306A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1077926C (en) * | 1999-06-11 | 2002-01-16 | 中山大学 | Process for preparing activated carbon fibres by boric acid activating method |
| CN1085617C (en) * | 1999-02-05 | 2002-05-29 | 中国科学院山西煤炭化学研究所 | Process for controlling porous structure of spherical asphalt-base activated carbon |
-
1997
- 1997-01-31 CN CN 97101144 patent/CN1161306A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085617C (en) * | 1999-02-05 | 2002-05-29 | 中国科学院山西煤炭化学研究所 | Process for controlling porous structure of spherical asphalt-base activated carbon |
| CN1077926C (en) * | 1999-06-11 | 2002-01-16 | 中山大学 | Process for preparing activated carbon fibres by boric acid activating method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |