CN108328600A - A method of useless asphalt slag is changed into finished asphalt coke - Google Patents
A method of useless asphalt slag is changed into finished asphalt coke Download PDFInfo
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Abstract
The invention belongs to asphalt slag recovery and reuse technology fields of giving up, specifically, being related to a kind of method that useless asphalt slag is changed into finished asphalt coke.This method comprises the following steps：1) the useless asphalt slag of tunnel oven output is collected；2) the useless asphalt slag of collection is cleared up；3) the useless asphalt slag cleaned out is crushed, obtains broken useless pitch solid impurity particle and powder；4) broken useless pitch solid impurity particle and powder are packed into saggar, send to electric furnace and is roasted；5) after the completion of roasting, saggar is taken out out of electric furnace, is cooled down, it is burnt to obtain available finished asphalt.It is burnt using the obtained finished asphalt of method provided by the present invention, meet national standard after testing, with recycle value, to solve in machining graphite field, the problems such as useless asphalt slag of tunnel oven institute output cannot be efficiently used, be polluted the environment, causing damages to enterprise, and the utilization rate of useless asphalt slag is substantially increased, create certain social value.
Description
Technical field
The invention belongs to asphalt slag recovery and reuse technology fields of giving up, specifically, being related to a kind of changing useless asphalt slag
For the method for finished asphalt coke.
Background technology
Graphite product after tunnel oven is used to impregnate coal tar pitch carries out the process that secondary or multiple roasting is processed.Passing through will
Impregnated graphite product are put in kiln car, and kiln car is pushed into tunnel oven, by preheating zone (200-280 DEG C), roasting band (280-
760 DEG C), pre- cold belt (760-400 DEG C), (temperature here refers to tunnel oven internal temperature to main cold belt (400-200 DEG C), graphite leaching
100-150 DEG C more slightly lower than kiln temperature of stain product actual temperature) etc. links make the coal tar pitch inside its impregnated graphite product carry out coking,
Charing, the pitch for keeping its extra are discharged on the food tray of kiln car outside, obtain secondary or multiple graphite sinter product therefrom.
It will produce largely useless asphalt slag cinder during producing graphite product, useless asphalt slag cinder can condense in kiln
The food tray bottom of vehicle, forms the pitch cinder that thickness reaches 20 centimetres, clears up food tray bottom by worker, its pitch cinder is fallen
Enter and work as waste dump in food bag, be thrown into spoil area, can not be utilized, very waste of resource, while environment is also resulted in
Pollution.
In view of this, special propose the present invention.
Invention content
The technical problem to be solved in the present invention, which is to overcome the deficiencies of the prior art and provide, a kind of to be changed into useless asphalt slag
The method of finished asphalt coke, to solve in machining graphite field, the useless asphalt slag of tunnel oven institute output cannot efficiently use, from
And the problems such as polluting the environment, causing damages to enterprise.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：
A method of useless asphalt slag being changed into finished asphalt coke, this method comprises the following steps：
1) the useless asphalt slag of tunnel oven output is collected；
2) the useless asphalt slag of collection is cleared up；
3) the useless asphalt slag cleaned out is crushed, obtains broken useless pitch solid impurity particle and powder；
4) broken useless pitch solid impurity particle and powder are packed into saggar, send to electric furnace and is roasted；
5) after the completion of roasting, saggar is taken out out of electric furnace, is cooled down, it is burnt to obtain available finished asphalt.
Graphite product after tunnel oven is used to impregnate coal tar pitch carries out the process that secondary or multiple roasting is processed.However
Will produce largely useless asphalt slag, useless asphalt slag during production graphite product can condense in the food tray bottom of kiln car, be formed
Thickness reaches 20 centimetres of useless asphalt slag, clears up food tray bottom by worker, the asphalt slag that given up, which pours into, works as waste in food bag
It stacks, is thrown into spoil area.It can not be utilized, very waste of resource, while pollution is also resulted in environment.
The present invention provides a kind of method that useless asphalt slag is changed into finished asphalt coke, this method includes being produced to tunnel oven
The mistake that the useless asphalt slag gone out is collected, clears up, being crushed, being fitted into saggar, be sent into electric furnace roasting, take out and cool down from electric furnace
Journey, the method provided through the invention, which can generate the useless asphalt slag recycling of tunnel oven output, has utility value
Finished asphalt it is burnt, to solve in machining graphite field, the useless asphalt slag of tunnel oven institute output cannot efficiently use, is right
The problems such as environment is polluted, is caused damages to enterprise.
Further, in the above method, wherein in step 4), the Baking profile progress being roasted to according to formulation
Roasting, the Baking profile are：
First stage：0-400 DEG C freely heats up
Second stage：400-950 DEG C heats up 55 DEG C per hour
Phase III：950-1100 DEG C heats up 75 DEG C per hour
Fourth stage：1100 DEG C of constant temperature 100 hours
5th stage：1100-400 DEG C of 17.5 DEG C per hour of cooling.
The Baking profile of the present invention is shorter than the Baking profile time of graphite product, can greatly reduce the consumption of the energy, roasts
The curve of graphite product is 500 hours or more, and this Baking profile is 116 hours, than the curve of shortest roasting graphite product
Shorten 384 hours.Production cycle also greatly shortens, and same yield is also significantly increased.
Meanwhile the present invention adjusts Baking profile, has formulated the roasting of the useless asphalt slag suitable for tunnel oven output
Curve is burnt, roasting is divided into three temperature rise periods, a constant temperature stage and a temperature-fall period, and strictly control each stage
Temperature range and rate of change, it is ensured that product quality.
Specifically, in the roasting process of the present invention, in 0-400 DEG C of free temperature rise period, for the drainage procedure that heats up；
400-950 DEG C heats up 55 DEG C of stages per hour, despumation (ash, sulphur, volatile matter etc.)；It heats up per hour at 950-1100 DEG C
75 DEG C, to improve real density process；In the 1100-400 DEG C of cooling of 1100 DEG C of fourth stage constant temperature 100 hours and the 5th stage per small
When 17.5 DEG C, the institutional framework of roasting product occurs to reset, adjustment, and is further densified.It is obtained through overtesting, this plot against time
It is short, low energy consumption and useless each index of pitch cinder can be made to reach the country of pitch coke, professional standard, used.
Experiments have shown that the finished product obtained by Baking profile using the present invention meets national standard, high yield rate.
Further, in step 5), the cooling is freely to cool down.
It is preferred that described freely cools down to be freely cooled to 300 DEG C from 400 DEG C.
Further, in step 3), described is broken for being crushed to grain size 2cm particles below.
In the present invention, the benefit amount of being loaded into that useless asphalt slag is broken into fritter is big, reduce unit consumption, be easy it is heated.
In the present invention, other impurity cannot be mixed into when the useless asphalt slag of collection tunnel oven output in step 1).
In step 2), the useless asphalt slag of collection is cleared up, mainly by the extra ash content on useless asphalt slag surface and miscellaneous
Matter is cleaned out.
In step 3), when the useless asphalt slag cleaned out is carried out broken, crushing plant ground need to be smooth, and on the ground
It is laid with the smooth steel plate in surface and obtains broken useless pitch solid impurity particle and powder in order to avoid ash and other impurity are brought into.
The present invention also provides a kind of finished asphalt cokes, wherein the finished asphalt coke is to use side of the present invention
What method obtained.
Further, ash content ＜ 0.5%, volatile matter ＜ 0.8%, the moisture ＜ 1.0% of the finished asphalt coke, it is very close
Spend ＞ 1.96%, sulphur ＜ 0.5%.
It is burnt using the obtained finished asphalt of method provided by the present invention, meet national standard after testing, has again sharp
With value, to solve in machining graphite field, the useless asphalt slag of tunnel oven institute output cannot be efficiently used, be made to environment
The problems such as at polluting, causing damages to enterprise.Meanwhile the finished asphalt coke obtained using method provided by the present invention is not by
With the broken of grain size, the raw material that can be used as graphite product is added in the ratio of 10%-20% in raw materials for production, not only can be improved
The utilization rate of useless asphalt slag can also make the product produced improve mechanical strength, while graphite product is after being added to pitch coke,
The yield rate of the processes such as roasting, graphitization also increases, and reason is that pitch coke already belongs to carbonization product, so being carbonized in process
When be easier be sintered.The utilization rate for substantially increasing useless asphalt slag has createed certain social value.
Specifically, the ash content of the finished asphalt coke is 0.47%, volatilization is divided into 0.56%, moisture 0.03%,
Real density is 2.07%, sulphur 0.41%.
The present invention also provides application of the finished asphalt coke in the raw materials for production as graphite product.
Specifically, when the finished asphalt coke in the raw materials for production as graphite product in application, its add
Amount is the 10%-20wt% of production material quantity.
The finished asphalt coke obtained using method provided by the present invention can be used as graphite system by the broken of different-grain diameter
The raw material of product is added in the ratio of 10%-20% in raw materials for production, and the utilization rate of useless asphalt slag not only can be improved, and can also make life
The product of output improves mechanical strength, while graphite product is after being added to pitch coke, the yield rate of the processes such as roasting, graphitization
Also it increases, reason is that pitch coke already belongs to carbonization product, so being easier to be sintered when process is carbonized.It substantially increases useless
The utilization rate of asphalt slag has createed certain social value.
After adopting the above technical scheme, the present invention has the advantages that compared with prior art：
(1) finished asphalt coke, warp can be converted the useless asphalt slag of tunnel oven output to using method provided by the present invention
Detection meets national standard, has recycle value, to solve in machining graphite field, the useless drip of tunnel oven institute output
The problems such as green slag cannot be efficiently used, be polluted the environment, causing damages to enterprise.
(2) the finished asphalt coke obtained using method provided by the present invention can be used as stone by the broken of different-grain diameter
The raw material of black product is added in the ratio of 10%-20% in raw materials for production, and the utilization rate of useless asphalt slag cinder not only can be improved,
The product produced can be also set to improve mechanical strength, while graphite product is after being added to pitch coke, the processes such as roasting, graphitization
Yield rate also increase, reason be pitch coke already belong to carbonization product, so when process be carbonized be easier sintering.Significantly
The utilization rate for improving useless asphalt slag has createed certain social value.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention,
Technical solution in embodiment is clearly and completely described, following embodiment is not limited to for illustrating the present invention
The scope of the present invention.
Embodiment 1
1) the useless asphalt slag for collecting tunnel oven output, cannot be mixed into other impurity；
2) the useless asphalt slag of collection is cleared up, is mainly cleared up the extra ash content on useless asphalt slag surface and impurity dry
Only；
3) the useless asphalt slag cleaned out is crushed, crushing plant ground need to be smooth, and is laid with surface on the ground
Smooth steel plate obtains broken useless pitch solid impurity particle and powder in order to avoid ash and other impurity are brought into；
4) broken useless pitch solid impurity particle and powder are packed into saggar, send to electric furnace and is roasted；
5) after the completion of roasting, saggar is taken out out of electric furnace, is cooled down, it is burnt to obtain available finished asphalt.
Embodiment 2
1) the useless asphalt slag for collecting tunnel oven output, cannot be mixed into other impurity；
2) the useless asphalt slag of collection is cleared up, is mainly cleared up the extra ash content on useless asphalt slag surface and impurity dry
Only；
3) the useless asphalt slag cleaned out is crushed, crushing plant ground need to be smooth, and is laid with surface on the ground
Smooth steel plate obtains broken useless pitch solid impurity particle and powder in order to avoid ash and other impurity are brought into；
4) broken useless pitch solid impurity particle and powder are packed into saggar, send to electric furnace and is carried out according to the Baking profile of formulation
Roasting；The Baking profile is：
First stage：0-400 DEG C freely heats up
Second stage：400-950 DEG C heats up 55 DEG C per hour
Phase III：950-1100 DEG C heats up 75 DEG C per hour
Fourth stage：1100 DEG C of constant temperature 100 hours
5th stage：1100-400 DEG C of 17.5 DEG C per hour of cooling.
5) after the completion of roasting, saggar is taken out out of electric furnace, is cooled down, it is burnt to obtain available finished asphalt.
Embodiment 3
1) the useless asphalt slag for collecting tunnel oven output, cannot be mixed into other impurity；
2) the useless asphalt slag of collection is cleared up, is mainly cleared up the extra ash content on useless asphalt slag surface and impurity dry
Only；
3) the useless asphalt slag cleaned out is crushed, crushing plant ground need to be smooth, and is laid with surface on the ground
Smooth steel plate obtains broken useless pitch solid impurity particle and powder in order to avoid ash and other impurity are brought into；
4) broken useless pitch solid impurity particle and powder are packed into saggar, send to electric furnace and is carried out according to the Baking profile of formulation
Roasting；The Baking profile is：
First stage：0-400 DEG C freely heats up
Second stage：400-950 DEG C heats up 55 DEG C per hour
Phase III：950-1100 DEG C heats up 75 DEG C per hour
Fourth stage：1100 DEG C of constant temperature 100 hours
5th stage：1100-400 DEG C of 17.5 DEG C per hour of cooling.
5) roast after the completion of, saggar is taken out out of electric furnace, 300 DEG C are freely cooled to from 400 DEG C, obtain it is available at
Product pitch coke.
Embodiment 4
1) the useless asphalt slag for collecting tunnel oven output, cannot be mixed into other impurity；
2) the useless asphalt slag of collection is cleared up, is mainly cleared up the extra ash content on useless asphalt slag surface and impurity dry
Only；
3) the useless asphalt slag cleaned out is crushed, is crushed to grain size 2cm particles below, crushing plant ground needs
It is smooth, and be laid with the smooth steel plate in surface on the ground and obtain broken useless asphalt slag in order to avoid ash and other impurity are brought into
Particle and powder；
4) broken useless pitch solid impurity particle and powder are packed into saggar, send to electric furnace and is carried out according to the Baking profile of formulation
Roasting；The Baking profile is：
First stage：0-400 DEG C freely heats up
Second stage：400-950 DEG C heats up 55 DEG C per hour
Phase III：950-1100 DEG C heats up 75 DEG C per hour
Fourth stage：1100 DEG C of constant temperature 100 hours
5th stage：1100-400 DEG C of 17.5 DEG C per hour of cooling.
5) after the completion of roasting, saggar is taken out out of electric furnace, is cooled down, it is burnt to obtain available finished asphalt.
Embodiment 5
1) the useless asphalt slag for collecting tunnel oven output, cannot be mixed into other impurity；
2) the useless asphalt slag of collection is cleared up, is mainly cleared up the extra ash content on useless asphalt slag surface and impurity dry
Only；
3) the useless asphalt slag cleaned out is crushed, is crushed to grain size 2cm particles below, crushing plant ground needs
It is smooth, and be laid with the smooth steel plate in surface on the ground and obtain broken useless asphalt slag in order to avoid ash and other impurity are brought into
Particle and powder；
4) broken useless pitch solid impurity particle and powder are packed into saggar, send to electric furnace and is carried out according to the Baking profile of formulation
Roasting；The Baking profile is：
First stage：0-400 DEG C freely heats up
Second stage：400-950 DEG C heats up 55 DEG C per hour
Phase III：950-1100 DEG C heats up 75 DEG C per hour
Fourth stage：1100 DEG C of constant temperature 100 hours
5th stage：1100-400 DEG C of 17.5 DEG C per hour of cooling.
5) roast after the completion of, saggar is taken out out of electric furnace, 300 DEG C are freely cooled to from 400 DEG C, obtain it is available at
Product pitch coke.
Test example 1
This test example detects the performance of finished asphalt coke made from various embodiments of the present invention, and with before processing
The performance of useless asphalt slag and the professional standard of pitch coke are compared, and as a result see the table below shown in 1：
Table 1
| Test name | Ash content % | Volatile matter % | Moisture content % | Real density % | Sulphur % |
| Pitch coke professional standard | ＜ 0.5 | ＜ 0.8 | ＜ 1.0 | ＞ 1.96 | ＜ 0.5 |
| Useless asphalt slag | 3.88 | 4.40 | 1.76 | 1.71 | 0.64 |
| Embodiment 1 | 0.47 | 0.56 | 0.03 | 2.07 | 0.41 |
| Embodiment 2 | 0.17 | 0.43 | 0.03 | 2.00 | 0.39 |
| Embodiment 3 | 0.21 | 0.48 | 0.04 | 2.02 | 0.41 |
| Embodiment 4 | 0.21 | 0.47 | 0.03 | 2.00 | 0.41 |
| Embodiment 5 | 0.19 | 0.40 | 0.02 | 2.06 | 0.41 |
It can be seen that from above-mentioned testing result from the performance of the useless asphalt slag of tunnel oven output and do not meet pitch coke industry mark
Standard does not have utility value, works as waste dump at present, be thrown into spoil area, to cause a large amount of wastes of resource, while
Pollution is caused to environment.And it is obtained after being handled the useless asphalt slag of tunnel oven output by using the method for the present invention
It is burnt to meet pitch coke professional standard, the finished asphalt of even higher than professional standard, substantially increases the utilization rate of useless asphalt slag, creates
Certain social value is produced.
The above is only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, the technology people of any familiar present invention
Member without departing from the scope of the present invention, when the technology contents using above-mentioned prompt make it is a little variation or be modified to
The equivalent embodiment of equivalent variations, it is right according to the technical essence of the invention as long as being the content without departing from technical solution of the present invention
Any simple modification, equivalent change and modification made by above example, in the range of still falling within the present invention program.
Claims (10)
1. a kind of method that useless asphalt slag is changed into finished asphalt coke, which is characterized in that described to be changed into useless asphalt slag
The method of finished asphalt coke includes the following steps：
1) the useless asphalt slag of tunnel oven output is collected；
2) the useless asphalt slag of collection is cleared up；
3) the useless asphalt slag cleaned out is crushed, obtains broken useless pitch solid impurity particle and powder；
4) broken useless pitch solid impurity particle and powder are packed into saggar, send to electric furnace and is roasted；
5) after the completion of roasting, saggar is taken out out of electric furnace, is cooled down, it is burnt to obtain available finished asphalt.
2. the method according to claim 1 that useless asphalt slag is changed into finished asphalt coke, which is characterized in that step 4)
In, described being roasted to is roasted according to the Baking profile of formulation, and the Baking profile is：
First stage：0-400 DEG C freely heats up
Second stage：400-950 DEG C heats up 55 DEG C per hour
Phase III：950-1100 DEG C heats up 75 DEG C per hour
Fourth stage：1100 DEG C of constant temperature 100 hours
5th stage：1100-400 DEG C of 17.5 DEG C per hour of cooling.
3. the method according to claim 1 or 2 that useless asphalt slag is changed into finished asphalt coke, which is characterized in that step
5) in, the cooling is freely to cool down.
4. the method according to claim 3 that useless asphalt slag is changed into finished asphalt coke, which is characterized in that it is described from
By cooling down 300 DEG C are freely cooled to from 400 DEG C.
5. useless asphalt slag to be changed into the method for finished asphalt coke according to any one of claims 1-4, feature exists
In in step 3), described is broken for being crushed to grain size 2cm particles below.
6. a kind of finished asphalt is burnt, which is characterized in that the finished asphalt coke is using described in claim 1-5 any one
Method obtain.
7. finished asphalt according to claim 6 is burnt, which is characterized in that the ash content ＜ 0.5% of the finished asphalt coke,
Volatile matter ＜ 0.8%, moisture ＜ 1.0%, real density ＞ 1.96%, sulphur ＜ 0.5%.
8. finished asphalt according to claim 7 is burnt, which is characterized in that the ash content of the finished asphalt coke is
0.47%, volatilization is divided into 0.56%, moisture 0.03%, real density 2.07%, sulphur 0.41%.
9. finished asphalt coke the answering in the raw materials for production as graphite product described in a kind of claim 6-8 any one
With.
10. application according to claim 9, which is characterized in that the finished asphalt coke is in the life as graphite product
Produce in raw material in application, its additive amount is the 10%-20wt% for producing material quantity.
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| CN201810144227.1A CN108328600B (en) | 2018-02-12 | 2018-02-12 | A method of useless asphalt slag is changed into finished asphalt coke |
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2018
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