CN107915224A - The method of activated carbon and the activated carbon of acquisition are prepared using semi-coke small powder and coal tar - Google Patents
The method of activated carbon and the activated carbon of acquisition are prepared using semi-coke small powder and coal tar Download PDFInfo
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Abstract
The present invention relates to a kind of activated carbon for the method and acquisition that activated carbon is prepared using semi-coke small powder and coal tar.The method of the present invention includes the following steps：(1) pre-process：Semi-coke small powder is crushed, until the D of particle95≤0.15mm；(2) it is molded：The particle that step (1) obtains is uniformly mixed with middle coalite tar and water, and is activated carbon precursor by mixture extrusion molding, wherein the weight ratio of the particle and the middle coalite tar is in the range of 1.5 3.0: 1；(3) carbonize：The activated carbon precursor is subjected to air pre-oxidation at a temperature of 150 200 DEG C, is then carbonized at 780 920 DEG C, activated carbon is obtained after cooling.The present invention method characteristic be：Simplify production technology, improve production efficiency, reduce production cost.Moreover, obtained activated carbon has extraordinary mechanical strength and absorption property.
Description
Technical field
The present invention relates to activated carbon technology of preparing, and in particular to a kind of to prepare activated carbon using semi-coke small powder and coal tar
Method, and the activated carbon obtained by this method.
Background technology
Semi-coke (blue coke), is high-volatile bituminous coal destructive distillation under middle cryogenic conditions of no cohesiveness or weakly caking
It is pyrolyzed the solid carbonaceous product of obtained relatively low volatile.Semi-coke is widely used in the production such as calcium carbide, ferroalloy, ferrosilicon, carborundum
In the production of product, appearance is light/dark balance bulk semicoke.According to particle size, semi-coke can be roughly divided into bulk semi-coke, middle piece of orchid
Charcoal, fritter semi-coke (or semi-coke small powder), semi-coke are last (coke powder or focal plane)., can be with byproduct coal tar in the production of semi-coke
The generation of oil.Coal resources advantage and local numerous coke-oven plant by North Shaanxi, semi-coke small powder and coal tar have
The advantages that yield greatly, is easily bought, quality is good, cheap.
Activated carbon is a kind of carbonaceous sorbing material with Complicated Pore Structures and huge specific surface area.Activated carbon have than
Surface area is high, adsorption capacity is strong, chemical stability is good, mechanical strength is high, and can facilitate the features such as regenerating, thus is widely used
In the field such as industry, agricultural, national defence, traffic, medical and health, environmental protection, water process and food and drink application are applied especially to
Field.As social development and living standards of the people improve, activated carbon demand is in the trend risen year by year, especially in recent years
With the increasingly raising of environmental protection requirement so that the demand of domestic and international activated carbon is increasing, increases year by year.
In general, activated carbon is using fat coal, semicoke or shell as raw material, by machine-shaping, charing, activation, rinsing, baking
The series of steps such as dry is made.
Chinese patent discloses 105271223 A of CN and discloses a kind of preparation method of water purification granular activated carbon, it includes
Milling, mixing, be granulated, be dry, carbonizing, broken, activation step.The method of the patent includes multiple and different units, adds
Work process is more complicated.The specific performance parameter of undisclosed activated carbon.
Chinese patent discloses 104383876 A of CN and discloses a kind of preparation method of sewage disposal granular activated carbon, its
It is middle to use coke powder, coking coal and pitch to be mixed with certain proportion, with cross be milled, mixing, be granulated, it is dry, charcoal work is carried out in STK stoves
Change.The patent method requirement using special ratios raw mixture, and require carry out at least eight it is small when charcoal activation step
Suddenly.The specific performance parameter of undisclosed activated carbon.
Chinese patent disclose 106587056 A of CN disclose it is a kind of the method for activated carbon is prepared using semicoke, wherein using
The metal oxide pelletizing of preheating is mixed with semicoke.In the method, it is necessary to metal oxide, to promote and strengthen charing
Reaction and priming reaction.The iodine absorption number of caused activated carbon is only 520-630mg/g.
Chinese patent discloses the preparation method and its equipment that 103395783 A of CN disclose activated carbon.In the method,
By coke or semi-coke be levigate, screening, dry, then add person in KOH solution boil 1-2 it is small when.By KOH powder and through KOH solution
The coke mixing of processing, the microwave heating activation in nitrogen, is then neutralized with acid solution.In the method, employ nitrogen as also
Originality gas, selects KOH as activator, thus needs the air-tightness reaction unit using high temperature-resistant acid-resistant caustic corrosion.Moreover,
In this method using microwave come heat-activated, it is necessary to using more complicated reaction unit.
As it can be seen that in traditional active charcoal preparing process, when using semicoke for raw material, it is necessary to semicoke is carried out acidleach or
Person's alkaline pretreatment, to improve raw material activity, adds binding agent shaping, is then carbonized, activated, rinsed, dried.This
The traditional active charcoal preparing process of kind has the following disadvantages：(1) needed in production process of activated carbon using a variety of chemical reagent (bag
Include sour, alkali and activator, purificant etc.)；(2) technological process of production is grown, and need to pass through acidleach or alkaline pretreatment, activation, drift
Multiple steps, tedious process, low production efficiency, the cycle length such as wash, dry；(3) to the more demanding (for example, being used for gas of device
The sealing requirements of body protection, acid corrosion-resistant, alkali corrosion resistance), greatly improve its production cost.
Therefore, it is necessary to a kind of method for preparing activated carbon of simplification, its production efficiency is high, technique is simple, the cycle is shorter and
Cost is low, and the activated carbon produced has good mechanical strength and absorption property.
The content of the invention
The first aspect of the present invention provides a kind of method that activated carbon is prepared using semi-coke small powder and coal tar, it includes
The following steps：
(1) pre-process：Semi-coke small powder is crushed, until the D of particle95≤0.15mm；
(2) it is molded：The particle that step (1) obtains is uniformly mixed with middle coalite tar and water, and extrusion molding is work
Property carbon precursor；
(3) carbonize：The activated carbon precursor is used to air pre-oxidation 90 minutes at a temperature of 150-200 DEG C, then
Carbonized at 780-920 DEG C, activated carbon is obtained after cooling.
The method according to the invention can not include the activation step using activator.
The method according to the invention can produce the activated carbon with excellent mechanical strength.Specifically, method of the invention
The activated carbon of production have at least 90%, preferably at least 95%, more preferably at least 97% granule strength.Side according to the present invention
Method can also produce the activated carbon with excellent absorption property.Specifically, the activated carbon of method of the invention production has at least
700mg/g, preferably at least 800mg/g, the more preferably preferably at least activated carbon of the iodine sorption value of 900mg/g.
The method of the present invention can realize following advantage：Production efficiency is high, technique is simple, the cycle is shorter and cost is low.
The second aspect of the present invention provides a kind of activated carbon that can be obtained by the method for the present invention, wherein the activated carbon
With at least 90%, preferably 92%, more preferably at least 95%, even more desirably at least 97% granule strength, and at least
700mg/g, preferably at least 800mg/g, the more preferably preferably at least iodine sorption value of 900mg/g.Advantageously, the activated carbon can
With with high production efficiency and low into original acquisition.
Brief description of the drawings
The schematic diagram of the method for the present invention is shown in Fig. 1.
Embodiment
Herein, term " semi-coke " refers to according to Chinese people's republicanism figure standard GB/T/T 25212-2010《Semi-coke
Product variety and grade classification》Product, i.e., high-volatile bituminous coal without cohesiveness or weakly caking does under middle cryogenic conditions
Evaporate the solid carbonaceous product for the relatively low volatile that pyrolysis obtains.
Herein, term " semi-coke small powder " is otherwise known as " fritter semi-coke ", refers to orchid of the particle size between 6mm to 13mm
Charcoal product.
In the art, coal tar is fluid product of the coal in destructive distillation, gasification or pyrolytic process, it contains fat
The very high organic matters of value such as hydrocarbon, alkene, phenol category hydrocarbon, cycloalkane and aromatic hydrocarbon.Coal tar can be divided into low temperature coal by pyrolysis temperature
Tar, medium temperature coal tar and high temperature coal-tar.In the method for the invention, term " middle coalite tar " refers in 450-900
The tar obtained under pyrolysis temperature below DEG C.
The method according to the invention includes following pre-treatment step (1)：Semi-coke small powder is crushed, until the D of particle95≤
0.15mm。
In the method for the invention, there is very big advantage as raw material using semi-coke small powder and coal tar, such as produces
Amount is big, easily purchase, and quality is good, and cheap.In some illustrative embodiments of the present invention, using North Shaanxi
The semi-coke small powder of coke-oven plant's production is as the raw material for preparing activated carbon, its particle diameter is 6mm-13mm, dry basis ash content：7-9%, butt
Volatile matter：5-8%.The middle coalite tar produced using North Shaanxi coke-oven plant, its density are more than 1030kg/m3, moisture is small
In 5%.
It is surprisingly found by the inventors that compared with common coke or coke powder, using semi-coke small powder as raw material, can be had
There is the activated carbon of extraordinary absorption property.
In step (1), it can be pre-processed using method and apparatus as known in the art so that semi-coke small powder
Particle size reduce.In some embodiments, can be using pulverizer, mill come control material to desired ruler
It is very little.For example, pre-processed using pulverizer.
The D of particle95With implication as known in the art, it represents in the size distribution of particle iterated integral from small to large
The percentage of cloth reaches corresponding particle size values during 95 weight %.D95=0.15mm represents that the particle of 95 weight % can pass through 100
Purpose sieve aperture.D95≤ 0.15mm then represents that the particle no less than 95 weight % can be by the sieve aperture of 100 mesh.Ability can be used
Known method in domain, such as dynamic laser scattering method, optical microscopy, specific surface area method, sedimentation etc., to measure particle
Size distribution and determine D95Value.
The method according to the invention includes following forming step (2)：By the particle that step (1) obtains and middle low temperature coal tar
Oil and water are uniformly mixed, and extrusion molding is activated carbon precursor.In the present invention, in use coalite tar and water combination
As hybrid process auxiliary agent.Such hybrid process auxiliary agent both has suitable viscosity, may also provide stronger with semi-coke small powder
Compatibility.Therefore, can guarantee to be sufficiently mixed uniformly with the semi-coke small powder of solid granular using the hybrid process auxiliary agent, and
So that mixture is conducive to follow-up extrusion molding processing.In the activated carbon precursor using such mixture extrusion molding,
Semi-coke small powder can be assembled in a manner of more close, and middle coalite tar and moisture comprising proper content.Such activity
Carbon precursor after charing, can obtain the activated carbon of excellent mechanical strength, such as with least 90% granule strength
Activated carbon.In addition, without being bound by any theory, the activated carbon precursor of middle coalite tar and moisture containing proper content
The activated carbon with excellent absorption property can be advantageously obtained, because on the one hand middle coalite tar and water can play physics work
Change the effect of activated carbon, all on the other hand there is oxygen-containing component, can also be (such as 780-920 DEG C, preferably 800- in high temperature
900 DEG C) under play the role of chemical activation activated carbon.For example, the iodine that obtained activated carbon can have at least 700mg/g adsorbs
Value.
In a preferred embodiment, in step (2), the weight of particle and middle coalite tar that step (1) obtains
Than in the range of 1.5-3.0: 1.It is highly preferred that by ratio control in the range of 2.0-2.5: 1.In particularly preferred embodiment party
In formula, which controls 2.2-2.3: 1.In some embodiments, the particle that step (1) obtains: middle coalite tar: water
Weight ratio preferably in (57~67): (23~33): 10, more preferably (60~64): (26~30): in the range of 10.Most
Goodly, particle: middle coalite tar: the weight ratio of water is 62: 28: 10.It is surprisingly found by the inventors that when using above-mentioned specific ratio
During example (especially optimal proportion), it can not only ensure to obtain excellent processing performance in forming step (2), but also can be in activity
The activated carbon with excellent mechanical strength and excellent absorption property is obtained after carbon precursor charing.According to preferred embodiment,
The activated carbon of gained have at least 92%, more preferably at least 95%, even more desirably at least 97% granule strength.According to preferred
Embodiment, the activated carbon preferably at least 800mg/g of gained, the more preferably preferably at least iodine sorption value of 900mg/g.
In step (2), it can be mixed using method and apparatus as known in the art.For example, by mixed
The mode for pinching kneading in pot carries out material mixing.Those skilled in the art can be according to actual conditions and actual needs, to determine
Mixing is most grown in short-term.Preferably, mixing progress at least 20 minutes, more preferably at least 30 minutes, even more preferably at least
40 minutes.The upper limit of incorporation time is not particularly limited, as long as obtaining uniformly mixed mixture.Mixed in view of long
Closing the time can extend manufacture cycle and cause that the production cost increases, can use relatively short incorporation time, such as no more than 3
Hour.
In the method for the invention, the mixing temperature of step (2) is preferably controlled, to promote to mix.Preferably, in 25-
Mixed at 60 DEG C, more preferably carried out at 30-50 DEG C.
According to actual conditions and desired activated carbon product, those skilled in the art can determine in forming step and obtain
Activated carbon precursor concrete shape.For example, it can form the mixture into as the work of cylindrical, spherical, diamond shape, box-shaped etc.
Property carbon precursor.Preferably, the cylinder for diameter 3mm or so or the activated carbon precursor of bar shaped are formed the mixture into.Alternatively,
Mixture can also be formed as the activated carbon precursor of irregular shape.In some embodiments, extrusion can be used
Mixed material comprising semi-coke small powder, middle coalite tar and water is extruded through with the mouth mold for it is expected shape of cross section by machine,
To obtain the activated carbon precursor with intended shape.
In step (3), air pre-oxidation is carried out to material at a temperature of 150-200 DEG C, to remove the moisture in material
And light component.In a preferred embodiment, the air pre-oxidation progress in step (3) at least 60 minutes, more preferably at least
80 minutes, such as 90 minutes, or 100 minutes.The time upper limit of air pre-oxidation is not particularly limited, as long as removing the overwhelming majority
The moisture and light component of (such as 90 weight %).It can extend manufacture cycle and lead in view of long air preoxidation time
Cause that the production cost increases, can use relatively short incorporation time, for example, no more than 5 it is small when, be preferably no more than 3 it is small when.
After pre-oxidation, it will be carbonized by the material of pre-oxidation.In some embodiments, charing can be in sky
Carried out in gas.
In a preferred embodiment, carbonized at 780-920 DEG C, preferably 800-900 DEG C.Inventor is in surprise
It was found that when being carbonized under 780-920 DEG C, preferably 800-900 DEG C of temperature range, the activated carbon of acquisition is with higher
Absorption property and mechanical strength.
In a preferred embodiment, charing carry out 1.5 to 5 it is small when, more preferably 1.75 to 4 it is small when, even more preferably from 2~
3 it is small when time, such as 2.5 it is small when.It is surprisingly found by the inventors that the activated carbon of acquisition has higher absorption property.
Without being bound by theory, inventor is thought when using the condition of carbonization of the present invention, i.e., in 150-200 DEG C of temperature
The lower pre-oxidation of degree, carbonize at a temperature of 800-900 DEG C, can best utilize middle low temperature contained in activated carbon precursor
Coal tar and the physically activated effect of water and chemical activation effect.According to preferred embodiment, the activated carbon of gained has
The iodine sorption value of at least 800mg/g, more preferably at least 900mg/g, at the same can also have at least 92%, more preferably at least 95%,
Even more desirably at least 97% granule strength.
The step of method of the present invention (3), can be carried out in conventional use of retort in the art, which can
With temperature control equipment, by carbonization temperature control within the scope of desired temperature.
In a preferred embodiment, method of the invention does not include the activation step using activator.In traditional work
In property charcoal preparation process, after carbonization, it usually needs activated, for example with water vapour, carbon dioxide or nitrogen etc.
Activator.However, it is found by the inventors that even if without activation, the preferable activated carbon of absorption property, while energy can be still obtained
Enough so that activated carbon has good mechanical strength.
The method for preparing activated carbon according to the present invention at least has the advantages that following three：(1) raw material type is less and valency
Lattice relative moderate, semi-coke small powder, coal tar and water；(2) technique is simple, with short production cycle；It is (3) relatively low to device requirement,
Special corrosion resistance device need not be used.The method of the present invention can improve Activated Carbon Production efficiency, reduce production cost,
Coke-oven plant's added value of product is improved, lengthening manufacturing chain, increases economic efficiency.
On the other hand, the present invention provides the activated carbon that the method according to the invention obtains.The method according to the invention obtains
Activated carbon show very high adsorption strength and mechanical strength.Preferably, activated carbon of the invention have at least 90%, extremely
Few 92%, at least 93%, at least 95%, more preferably at least 97% granule strength.Preferably, activated carbon of the invention has extremely
The iodine absorption of few 700mg/g, more preferably 750mg/g, even more preferably still 800mg/g, even more preferably still at least 900mg/g
Value.
Above the preferred solution of listed each feature can be combined in any way, as long as the common skill in this area
Art personnel can implement.Otherwise indicated, the raw material in embodiment and device are commercially available.
Embodiment
Further the present invention is illustrated with reference to embodiment.The present invention is not limited to Examples below.
Material and device：
Test method
Intensity：
According to chinese national standard GB/T 7702.3-2008《The measure of coal quality granular activated carbon test method intensity》Come
Measure the intensity of activated carbon.
Iodine sorption value：
According to chinese national standard GB/T 7702.7-2008《The survey of coal quality granular activated carbon test method iodine sorption value
It is fixed》To measure the iodine sorption value of activated carbon.
Embodiment 1：
Semi-coke small powder crushes it using pulverizer, until 95% particle passes through 100 mesh sieve holes.By 62: 28:
10 semi-coke small powder: coal tar: the weight ratio of water, will add coal tar and water through broken semi-coke small powder.By mixture mixed
It is uniform to pinch kneading in pot, at least 20 minutes, kneading temperature was 30-50 DEG C.Material is made using extruder by strip, diameter 3mm
Left and right.In retort, at a temperature of 150-200 DEG C, pre-oxidized 90 minutes using air, when then charing 2 is small at 850 DEG C.
After cooling, activated carbon is obtained.The activated carbon product performance of preparation is as follows：
Granule strength (%) 96.3
Iodine sorption value (mg/g) 836.29
Embodiment 2：
Semi-coke small powder crushes it using pulverizer, until 95% particle passes through 100 mesh sieve holes.By 62: 28:
10 semi-coke small powder: coal tar: the weight ratio of water, will add coal tar and water through broken semi-coke small powder.By mixture mixed
It is uniform to pinch kneading in pot, at least 20 minutes, kneading temperature was 30-50 DEG C.Material is made using extruder by strip, diameter 3mm
Left and right.In retort, at a temperature of 150-200 DEG C, pre-oxidized 90 minutes using air, then charing 2.5 is small at 850 DEG C
When.After cooling, activated carbon is obtained.The activated carbon product performance of preparation is as follows：
Granule strength (%) 97.6
Iodine sorption value (mg/g) 907.54
Embodiment 3：
Semi-coke small powder crushes it using pulverizer, until 95% particle passes through 100 mesh sieve holes.By 62: 28:
10 semi-coke small powder: coal tar: the weight ratio of water, will add coal tar and water through broken semi-coke small powder.By mixture mixed
It is uniform to pinch kneading in pot, at least 20 minutes, kneading temperature was 30-50 DEG C.Material is made using extruder by strip, diameter 3mm
Left and right.In retort, at a temperature of 150-200 DEG C, pre-oxidized 90 minutes using air, when then charing 3 is small at 850 DEG C.
After cooling, activated carbon is obtained.The activated carbon product performance of preparation is as follows：
Granule strength (%) 94.2
Iodine sorption value (mg/g) 901.14
Comparative example 1：
Semi-coke small powder crushes it using pulverizer, until 95% particle passes through 100 mesh sieve holes.By 62: 28:
10 semi-coke small powder: coal tar: the weight ratio of water, will add coal tar and water through broken semi-coke small powder.By mixture mixed
It is uniform to pinch kneading in pot, at least 20 minutes, kneading temperature was 30-50 DEG C.Material is made using extruder by strip, diameter 3mm
Left and right.In retort, at a temperature of 150-200 DEG C, pre-oxidized 90 minutes using air, when then charing 2.5 is small at 750 DEG C.
After cooling, activated carbon is obtained.The activated carbon product performance of preparation is as follows：
Granule strength (%) 98.3
Iodine sorption value (mg/g) 519.5
Comparative example 2：
Semi-coke small powder crushes it using pulverizer, until 95% particle passes through 100 mesh sieve holes.By 62: 28:
10 semi-coke small powder: coal tar: the weight ratio of water, will add coal tar and water through broken semi-coke small powder.By mixture mixed
It is uniform to pinch kneading in pot, at least 20 minutes, kneading temperature was 30-50 DEG C.Material is made using extruder by strip, diameter 3mm
Left and right.In retort, at a temperature of 150-200 DEG C, pre-oxidized 90 minutes using air, when then charing 2.5 is small at 950 DEG C.
After cooling, activated carbon is obtained.The activated carbon product performance of preparation is as follows：
Granule strength (%) 85.9
Iodine sorption value (mg/g) 924.1
Comparative example 3：
Activated carbon is prepared using semi-coke coke powder (granularity is less than the semi-coke of 5mm).To semi-coke coke powder using pulverizer to it
Crushed, until 95% particle passes through 100 mesh sieve holes.Semi-coke coke powder by 62: 28: 10: coal tar: the weight ratio of water,
Coal tar and water will be added through broken semi-coke coke powder.By mixture, kneading is uniform in kneading pot, at least 20 minutes, kneading temperature
Spend for 30-50 DEG C.Material is made using extruder by strip, diameter 3mm or so.In retort, at a temperature of 150-200 DEG C,
Pre-oxidized 90 minutes using air, when then charing 1.5 is small at 850 DEG C.After cooling, activated carbon is obtained.The activated carbon production of preparation
Moral character can be as follows：
Granule strength (%) 96.6
Iodine sorption value (mg/g) 461.19
Comparative example 4：
Activated carbon is prepared using semi-coke coke powder (granularity is less than the semi-coke of 5mm).To semi-coke coke powder using pulverizer to it
Crushed, until 95% particle passes through 100 mesh sieve holes.Semi-coke coke powder by 62: 28: 10: coal tar: the weight ratio of water,
Coal tar and water will be added through broken semi-coke coke powder.By mixture, kneading is uniform in kneading pot, at least 20 minutes, kneading temperature
Spend for 30-50 DEG C.Material is made using extruder by strip, diameter 3mm or so.In retort, at a temperature of 150-200 DEG C,
Pre-oxidized 90 minutes using air, when then charing 2 is small at 850 DEG C.After cooling, activated carbon is obtained.The activated carbon product of preparation
Performance is as follows：
Granule strength (%) 94.5
Iodine sorption value (mg/g) 627.03
Comparative example 5：
Activated carbon is prepared using semi-coke coke powder (granularity is less than the semi-coke of 5mm).To semi-coke coke powder using pulverizer to it
Crushed, until 95% particle passes through 100 mesh sieve holes.Semi-coke coke powder by 62: 28: 10: coal tar: the weight ratio of water,
Coal tar and water will be added through broken semi-coke coke powder.By mixture, kneading is uniform in kneading pot, at least 20 minutes, kneading temperature
Spend for 30-50 DEG C.Material is made using extruder by strip, diameter 3mm or so.In retort, at a temperature of 150-200 DEG C,
Pre-oxidized 90 minutes using air, when then charing 2.5 is small at 850 DEG C.After cooling, activated carbon is obtained.The activated carbon production of preparation
Moral character can be as follows：
Granule strength (%) 86.3
Iodine sorption value (mg/g) 640.1
Comparative example 6：
Semi-coke small powder crushes it using pulverizer, until 95% particle passes through 100 mesh sieve holes.By 72: 18:
10 semi-coke small powder: coal tar: the weight ratio of water, will add coal tar and water through broken semi-coke small powder.By mixture mixed
It is uniform to pinch kneading in pot, at least 20 minutes, kneading temperature was 30-50 DEG C.Material is made using extruder by strip, diameter 3mm
Left and right.In retort, at a temperature of 150-200 DEG C, pre-oxidized 90 minutes using air, when then charing 2.5 is small at 850 DEG C.
After cooling, activated carbon is obtained.The activated carbon product performance of preparation is as follows：
Granule strength (%) 64.5
From above experimental result, it is apparent that by the activated carbon that technical scheme obtains with excellent
Granule strength, while there is excellent absorption property., can be with for example, by embodiment 2 compared with comparative example 1 and comparative example 2
Find out, when being carbonized at a temperature of limiting in the present invention, obtain more than 90% intensity while 800mg/g
Iodine sorption value above.In comparative example 3-5, significantly reduced using coke powder as raw material, the iodine sorption value of acquisition.In comparative example
In 6, when the semi-coke small powder using 72: 18: 10: coal tar: during the weight ratio of water, the intensity of the activated carbon of acquisition is only
64.5%, hence it is evident that less than desired at least 90% granule strength of the present invention.These are the result shows that the technical solution of the application
Obtain unexpected technique effect.
Claims (11)
1. a kind of method that activated carbon is prepared using semi-coke small powder and coal tar, it comprises the following steps：
(1) pre-process：Semi-coke small powder is crushed, until the D of particle95≤0.15mm；
(2) it is molded：The particle that step (1) obtains is uniformly mixed with middle coalite tar and water, and by mixture extrusion molding
For activated carbon precursor, wherein the weight ratio of the particle and the middle coalite tar is in the range of 1.5-3.0: 1；
(3) carbonize：The activated carbon precursor is subjected to air pre-oxidation at a temperature of 150-200 DEG C, then at 780-920 DEG C
Under carbonized, activated carbon is obtained after cooling.
2. according to the method described in claim 1, wherein in step (2), the weight of the particle and the middle coalite tar
Ratio is measured in the range of 2.0-2.5: 1.
3. according to the method described in claim 1-2, the particle：Middle coalite tar：The weight ratio of water is in (57~67):
(23~33): in the range of 10.
4. according to the method described in claim 1-3, wherein in step (2), mixing carries out at least 20 minutes.
5. according to the method described in claim 1-4, wherein in step (2), the mixture is formed as cylinder, ball
Shape, diamond shape, the activated carbon precursor of box-shaped or irregular shape.
6. according to the method described in claim 5, wherein in step (2), the mixture is formed as diameter 3mm's or so
The activated carbon precursor of cylinder.
7. according to the method described in claim 1-6, the air pre-oxidation wherein in step (3) carries out at least 60 minutes.
8. according to the method described in claim 1-7, the charing wherein in step (3) carry out 1.5 to 5 it is small when.
9. according to the method described in claim 1-8, the wherein charing in step (3) carries out at 800-900 DEG C.
10. according to the method described in claim 1-9, wherein the method does not include the activation step using activator, and institute
Activated carbon is stated with least 90% granule strength and at least iodine sorption value of 700mg/g.
11. the activated carbon obtained by the method according to claim 1-10, wherein the activated carbon has at least 90%
Granule strength and at least iodine sorption value of 700mg/g.
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| CN201810004177.7A CN107915224B (en) | 2018-01-02 | 2018-01-02 | The method of active carbon and the active carbon of acquisition are prepared using semi-coke small powder and coal tar |
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| CN201810004177.7A CN107915224B (en) | 2018-01-02 | 2018-01-02 | The method of active carbon and the active carbon of acquisition are prepared using semi-coke small powder and coal tar |
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| CN108698834A (en) * | 2016-02-29 | 2018-10-23 | 康宁股份有限公司 | The method for manufacturing alkali activating activities carbon |
| CN109179407A (en) * | 2018-09-21 | 2019-01-11 | 西安建筑科技大学 | A kind of semi-coke base activated coke and preparation method thereof |
| CN109970057A (en) * | 2019-04-30 | 2019-07-05 | 陕西师范大学 | Cellular activated carbon based on coal liquefaction residue and semi-coke end |
| CN115893410A (en) * | 2022-12-12 | 2023-04-04 | 榆林学院 | Semi-coke-based activated carbon and preparation method thereof |
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| CN106698423A (en) * | 2017-02-08 | 2017-05-24 | 北京科技大学 | Method of preparing active coke for desulfurization and denitrification of sintering flue gas by using semi-coke |
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| CN108698834A (en) * | 2016-02-29 | 2018-10-23 | 康宁股份有限公司 | The method for manufacturing alkali activating activities carbon |
| CN108698834B (en) * | 2016-02-29 | 2022-08-02 | 康宁股份有限公司 | Method for producing alkali-activated carbon |
| CN109179407A (en) * | 2018-09-21 | 2019-01-11 | 西安建筑科技大学 | A kind of semi-coke base activated coke and preparation method thereof |
| CN109970057A (en) * | 2019-04-30 | 2019-07-05 | 陕西师范大学 | Cellular activated carbon based on coal liquefaction residue and semi-coke end |
| CN115893410A (en) * | 2022-12-12 | 2023-04-04 | 榆林学院 | Semi-coke-based activated carbon and preparation method thereof |
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