CN108002379B - Method for increasing carbon black recycling times - Google Patents
Method for increasing carbon black recycling times Download PDFInfo
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- CN108002379B CN108002379B CN201711347623.6A CN201711347623A CN108002379B CN 108002379 B CN108002379 B CN 108002379B CN 201711347623 A CN201711347623 A CN 201711347623A CN 108002379 B CN108002379 B CN 108002379B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/0003—Linings or walls
- F27D1/0033—Linings or walls comprising heat shields, e.g. heat shieldsd
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Abstract
The invention discloses a method for increasing the recycling times of carbon black, which maintains the loose state of the carbon black in the production process by adding carbon multi-ash to the thermal insulation material carbon black at the bottom of a graphitizing furnace, thereby better ensuring the insulation effect of the carbon black, greatly prolonging the service life of the carbon black, increasing the recycling times of the carbon black and reducing the production cost. The invention has simple principle and easy implementation, and has good effect on overcoming the defect that the loose state of the carbon black can not be well maintained in the production process at present, solving the problems of less recycling times of the carbon black, short service life of the carbon black and the like.
Description
Technical Field
The invention relates to the field of graphitization processes, in particular to a method for increasing the recycling times of carbon black.
Background
As is well known, during the production process of graphitizing the negative electrode material, carbon black is the first choice of furnace bottom heat insulation material. The carbon black can not only resist the high temperature of more than 3000 ℃, but also play a good role in insulation, and is a good auxiliary material in the aspect of the production of the whole cathode material. However, any material is subject to consumption problems during the manufacturing process, as is carbon black. When the cycle number reaches more than 8, the insulation property of the carbon black is reduced, so that new carbon black needs to be replaced or supplemented, and the carbon black is very expensive, so that the production cost is overhigh; moreover, through observation of daily production, it is found that one of key technologies for maintaining good insulation of carbon black as a heat insulation material of a graphitization furnace is to make the carbon black in a loose state as much as possible, but the carbon black is located at the bottommost part of the graphitization furnace, and a product of approximately 200 tons is often placed on the carbon black, so that the maintenance of the loose state by using a traditional method is almost impossible, and the service life of the carbon black is greatly shortened, so that problems to be solved such as how to increase the number of times of recycling the carbon black, reduce the supplement amount of the carbon black, and how to maintain the carbon black in a loose state are placed in front of each negative electrode material production enterprise.
The carbon multi-ash side is a product obtained by roasting a carbon material, has high mechanical strength and high resistivity, has chemical properties similar to those of carbon black, and has a price which is much cheaper than that of the carbon black, so that the carbon multi-ash side can play a role of a framework if being reasonably applied to a heat insulation material of a graphitization furnace, and can play a great help role in overcoming the defect that the carbon black has as the heat insulation material of the graphitization furnace.
Disclosure of Invention
The invention aims to provide a method for increasing the recycling frequency of carbon black, which solves the problem that the carbon black cannot be well kept in a loose state, so that the service life is short and the recycling frequency is low, thereby causing high production cost due to the fact that the carbon black is used as a heat-insulating material of a graphitization furnace.
In order to solve the problems, the technical scheme of the invention is as follows: adding a heat-insulating material with the total volume of 20m, the length of 3.7m, the width of 0.75m and the height of 0.75m into the bottom of a graphitization furnace, wherein the heat-insulating material comprises carbon black and a carbon multi-ash block, and the total volume of the carbon multi-ash block is 1/4-1/3 of the total volume of the heat-insulating material, and the method comprises the following steps:
s1, preparing a carbon multi-ash formula with uniform size, wherein the method comprises the following steps:
firstly, purchasing an integral multi-ash square with the sectional area of 200mm multiplied by 200mm and the height of 2m,
uniformly dividing the whole multi-ash square by using a cutting lathe to obtain the multi-ash square with the sectional area of 200mm multiplied by 200mm and the height of 500 mm;
thirdly, collecting the carbon multi-ash side obtained after the cutting, and transporting the carbon multi-ash side to a graphitization furnace for later use;
s2, after the graphitization furnace is cooled, uniformly placing 695 and 925 carbon multi-ash squares at the bottom of the graphitization furnace;
and S3, filling carbon black around the carbon multi-ash square to ensure that the carbon black is fully contacted with the carbon multi-ash square, and continuously adding the carbon black until the carbon multi-ash square is completely covered to ensure that the final height is 750 mm.
Preferably, the carbon black is a N330 type wet process carbon black.
Preferably, the carbon multi-ash side is a product obtained by roasting a carbon material, has high mechanical strength and high resistivity, and can play a role of a framework after being mixed with carbon black, thereby being beneficial to keeping the loose state of the carbon black.
The invention has the following beneficial effects:
1. the method provided by the invention can well keep the loose state of the carbon black at the furnace bottom in the production process of the graphitizing furnace, thereby greatly prolonging the service life of the carbon black which can reach 10 months while ensuring the good insulation of the carbon black.
2. The method provided by the invention can increase the recycling times of the carbon black. In actual production, the traditional method only uses carbon black as a heat insulation material of the graphitization furnace, and when the recycling frequency of the carbon black reaches more than 8 times, the insulation property of the carbon black is obviously reduced; according to the method provided by the invention, after the carbon soot is added into the carbon black, the carbon black can be recycled for 8-10 times more than the traditional method, so that the production cost is greatly saved and reduced.
3. By utilizing the method provided by the invention, the carbon black is combined with the carbon multi-ash formula to be used as the heat insulation material of the graphitization furnace, so that the using amount of the carbon black is reduced, and the price of the carbon multi-ash formula is much lower than that of the carbon black, thereby further saving the production cost.
4. The method provided by the invention is simple in principle and easy to implement.
Detailed Description
The present invention will be described in detail with reference to examples.
Example one
Adding a heat-insulating material with the total volume of 20m long multiplied by 3.7m wide multiplied by 0.75m high into the bottom of a graphitization furnace, wherein the heat-insulating material comprises N330 type wet-process carbon black and a carbon multi-ash block, and the total volume of the added carbon multi-ash block is 1/3 of the total volume of the heat-insulating material, and the method comprises the following steps:
s1, preparing a carbon multi-ash formula with uniform size, wherein the preparation method comprises the following steps:
firstly, purchasing a finished product with the sectional area of 200mm multiplied by 200mm and the height of 2m, namely a whole multi-ash square,
uniformly dividing the whole multi-ash square by using a cutting lathe to obtain a plurality of carbon multi-ash squares with the sectional areas of 200mm multiplied by 200mm and the heights of 500 mm;
thirdly, collecting the carbon multi-ash side obtained after the cutting, and transporting the carbon multi-ash side to a graphitization furnace for later use;
s2, after the graphitization furnace is cooled, uniformly placing 925 carbon multi-ash squares at the bottom of the graphitization furnace;
and S3, filling carbon black around the carbon multi-ash square to ensure that the carbon black is fully contacted with the carbon multi-ash square, and continuously adding the carbon black until the carbon multi-ash square is completely covered, wherein the final height reaches 750mm, so that the heat insulator at the bottom of the graphitization furnace with the whole volume of 20m, 3.7m, 0.75m and the width is formed. The carbon multi-ash side is a product obtained by roasting a carbon material, and the carbon multi-ash side can play a role of a skeleton after being mixed with carbon black, so that the carbon black can keep a good loose state when being stressed, the service life of the carbon black is prolonged, and the recycling frequency of the carbon black is increased.
Example two
The difference between the first embodiment and the second embodiment is that: the total volumes of carbon multi-ash-side added into the heat insulation material of the graphitization furnace are different.
Adding a heat-insulating material with the total volume of 20m long multiplied by 3.7m wide multiplied by 0.75m high into the bottom of a graphitization furnace, wherein the heat-insulating material comprises N330 type wet-process carbon black and a carbon multi-ash block, and the total volume of the added carbon multi-ash block is 1/4 of the total volume of the heat-insulating material, and the method comprises the following steps:
s1, preparing a carbon multi-ash formula with uniform size, wherein the preparation method comprises the following steps:
firstly, purchasing a finished product with the sectional area of 200mm multiplied by 200mm and the height of 2m, namely a whole multi-ash square,
uniformly dividing the whole multi-ash square by using a cutting lathe to obtain a plurality of carbon multi-ash squares with the sectional areas of 200mm multiplied by 200mm and the heights of 500 mm;
thirdly, collecting the carbon multi-ash side obtained after the cutting, and transporting the carbon multi-ash side to a graphitization furnace for later use;
s2, uniformly placing 695 carbon multi-ash squares to the bottom of the graphitization furnace after the graphitization furnace is cooled;
and S3, filling carbon black around the carbon multi-ash square to ensure that the carbon black is fully contacted with the carbon multi-ash square, and continuously adding the carbon black until the carbon multi-ash square is completely covered to ensure that the final height reaches 750mm, thereby forming the heat insulator at the bottom of the graphitization furnace, wherein the overall volume of the heat insulator is 20m long, 3.7m wide and 0.75m high.
The product and production data of examples one and two were analyzed and the results are shown in the following table:
when the heat insulator at the bottom of the graphitization furnace only contains carbon black:
TABLE 1
When carbon multi-ash is doped into the heat insulator at the bottom of the graphitization furnace:
TABLE 2
The data in table 1 and table 2 are combined to see that: after the carbon multi-ash formula is doped into the heat insulator at the bottom of the graphitization furnace, the cost can be saved by 142105.6 yuan per month under the conditions that 8 furnace products are produced per month and the yield is 224 tons, and the remarkable beneficial effect is achieved.
Claims (3)
1. A method for increasing the recycling times of carbon black is characterized in that a heat preservation material with the total volume of 20m long, 3.7m wide and 0.75m high is added into the bottom of a graphitization furnace, the heat preservation material comprises carbon black and a carbon multi-ash side, and the total volume of the carbon multi-ash side is 1/4-1/3 of the total volume of the heat preservation material, and the method comprises the following steps:
s1, preparing a carbon multi-ash formula with uniform size, wherein the method comprises the following steps:
firstly, purchasing an integral carbon multi-ash square with the sectional area of 200mm multiplied by 200mm and the height of 2m,
uniformly dividing the whole multi-ash square by using a cutting lathe to obtain a carbon multi-ash square with the sectional area of 200mm multiplied by 200mm and the height of 500 mm;
collecting the carbon multi-ash side obtained after the cutting, and transporting the carbon multi-ash side to a graphitization furnace for later use;
s2, after the graphitization furnace is cooled, uniformly placing 695 and 925 carbon multi-ash squares at the bottom of the graphitization furnace;
and S3, filling carbon black around the carbon multi-ash square to ensure that the carbon black is fully contacted with the carbon multi-ash square, and continuously adding the carbon black until the carbon multi-ash square is completely covered to ensure that the final height is 750 mm.
2. The method of claim 1, wherein the carbon black is a N330 type wet process carbon black.
3. The method of claim 1, wherein the carbon soot is a product obtained by calcining a carbon material, and has the characteristics of high mechanical strength and high resistivity.
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| JPS605683B2 (en) * | 1979-08-21 | 1985-02-13 | 東邦レーヨン株式会社 | Graphite fiber manufacturing equipment |
| DE3732073A1 (en) * | 1987-09-23 | 1989-04-06 | Siemens Ag | HIGH-PURITY INTERNAL LINING FOR AN ELECTRONIC LOWER STOVE |
| EP2399879B1 (en) * | 2009-02-17 | 2017-04-05 | Nippon Steel & Sumitomo Metal Corporation | Carbonaceous refractory material, process for producing same, and furnace bottom or side wall of blast furnace |
| CN102633260B (en) * | 2012-03-15 | 2014-01-08 | 新疆益丰西部陶瓷材料科技有限公司 | Silicon carbide synthesis method |
| CN102924097B (en) * | 2012-11-01 | 2014-05-14 | 郑州安耐克实业有限公司 | Carbon titanium combining self-protection brick for blast furnace hearth and furnace bottom |
| CN104370500A (en) * | 2014-04-22 | 2015-02-25 | 天津锦美碳材科技发展有限公司 | Active-carbon thermal-insulation material and preparation method thereof |
| CN104386682B (en) * | 2014-11-19 | 2017-01-11 | 宜宾天原集团股份有限公司 | Graphitization furnace and method for heat treatment of graphite powder by virtue of graphitization furnace |
| CN104843675A (en) * | 2015-06-10 | 2015-08-19 | 四川都江堰西马炭素有限公司 | Powder purifying method and powder purifying apparatus |
| CN105271190B (en) * | 2015-10-10 | 2017-10-24 | 大同新成新材料股份有限公司 | A kind of method for graphitizing of use acheson furnace to fine grained graphite product |
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