CN104661337A - Resistance material and use method thereof - Google Patents
Resistance material and use method thereof Download PDFInfo
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Abstract
The invention provides a resistance material which is residual asphalt. The residual asphalt comprises the following performance indexes: less than 1 percent of ash content and less than 1 percent of volatile component content, and the granularity is 10-30mm. The use method of the resistance material comprises the following steps: mixing the resistance material and a product to be roasted in a graphitization furnace, and then roasting to obtain a graphitized product, wherein the purity of the graphitized product obtained by roasting is over 98 percent. The resistance material provided by the embodiment of the invention has the advantages of reducing the ash content of the graphitized product, increasing the graphitization rate and the like. The use method has the advantages of effectively increasing the heating rate of the roasted product and the like.
Description
Technical field
The present invention relates to carbon element field, in particular to a kind of resistance material and preparation method thereof.
Background technology
In recent years, carbon element industry is flourish, and its main material charcoal and graphite material are the nonmetal solid materials based on carbon, wherein the material that is substantially made up of non-graphite matter carbon of Carbon Materials, and graphite material is then the material be substantially made up of graphite carbon.There is light weight, porousness, conductivity, thermal conductivity, corrosion resistance, lubrification, elevated temperature strength, thermal endurance, resistance to sudden heating, low-thermal-expansion, low elasticity, high-purity, the features such as machinability.
Carbon product can be divided into graphite electrode class, charcoal block class, graphite anode class, carbon resistance rod class by product purpose, stick with paste class, electric charcoal class, carbon fiber bar class, special graphite class, heat exchanger of graphite class etc.Graphite electrode class uses current density size according to permission, can be divided into general power graphite electrode.High power electrodes, ultra-high power graphite electrode.Charcoal block can be divided into carbon block for blast furnace, aluminium charcoal block, electric furnace block etc. by purposes.Carbon product can be divided into carbon product, graphite product, Carbon fibe and graphite fibre etc. by working depth height.It is different with production technology that carbon product presses raw material, can be divided into graphite product, carbon product, carbon fiber bar, special graphite goods etc.Carbon product, by ash content size contained by it, can be divided into again how grey goods and few grey goods (containing ash content lower than l%).
Carbon product mainly contains following several: (one) graphite electrode class: main with petroleum coke, needle coke for raw material, coal tar pitch makes bonding agent, through calcining, batching, kneading, die mould, roasting, graphitization, machine work and making, it is the conductor with electrical arc release electric energy, furnace charge being carried out to heat fused in arc furnace, according to its quality index height, common power, high power and ultra high power can be divided into.Graphite electrode comprises: (1) general power graphite electrode.Allow the graphite electrode using current density lower than 17A/ centimetres 2, be mainly used in making steel, the common power electric furnace of refining silicon, refining yellow phosphorus etc.(2) oxidation-resistant coated graphite electrode.The graphite electrode of surface-coated one deck oxidation resistant protective layer, is formed and can conduct electricity and the protective layer of high temperature oxidation resisting, reduces consumption of electrode during steel-making.(3) high power graphite electrode.Allow to use current density to be the graphite electrode of 18 ~ 25A/ centimetres 2, be mainly used in the high power electric arc furnace of making steel.(4) ultra high power graphite electrode.Allow to use current density to be greater than the graphite electrode of 25A/ centimetres 2.Be mainly used in ultra high power electric furnace arrangement for producing steel.(2) graphite anode class: main is raw material with petroleum coke, and coal tar pitch makes binding agent, through calcining, batching, kneading, die mould, roasting, dipping, graphitization, machine work and making.Be generally used for the conductive anode of electrolysis installation in electrochemical industry.Comprise: (1) various chemical industry positive plate, (2) various anode stub.(3) carbon resistance rod class: with carbonaceous material as anthracite and metallurgical coke (or petroleum coke) be raw material, coal tar pitch for binding agent, without graphitization, the repressed shaping and conductive electrode burnt till.It is not suitable for the electric furnace of melting high-grade alloy steel.Comprise: (l) how grey electrode (electrode produced with anthracite, metallurgical coke, pitch coke); (2) regeneration electrode (electrode produced with Delanium, native graphite); (3) carbon resistant rod (i.e. charcoal element checker brick); (4) carbon anode (prebaked anode produced with petroleum coke); (5) firing electrodes blank.
Graphitizing furnace is the equipment that carbon element industry is commonly used, it generally uses metallurgical coke grain (or graphitization metallurgical coke grain) to be graphitization resistance material, graphitizing furnace is the electric current furnace core resistance that passes through to be made up of roasting product and resistance material and produces heat, roasting product is heated to the high temperature needed for graphitization.
Furnace core resistance is formed by the resistance of roasting product and the resistant series of resistance material, but the resistance of roasting product is much smaller compared with the resistance of resistance material, when starting to be energized, the resistance of resistance material accounts for about 99% of furnace core resistance, at the end of energising, the resistance of resistance material also will account for about 97%, therefore can say that mainly electric current heats roasting product by the heat produced during resistance material in whole graphitizing process, so the initial stage resistance of resistance material and the operation tool of the resistance variations of resistance material in whole galvanization to graphitizing furnace are of great significance, it is spacing when regulating roasting product shove charge that the method adjusting furnace core resistance in actual production mainly contains two: one, two is adopt the resistance material of different resistance coefficient or the resistance material of different resistance coefficient is mixed rear use by a certain percentage.
In prior art, resistance material generally adopts graphitization metallurgical coke or metallurgical coke.If from the angle improving furnace temperature, wish that the resistance of resistance material is a little large, the resistance of resistance material also keeps higher numerical value up to the energising later stage, then all metallurgical coke grain is used to be resistance material, but the resistance of resistance material differs larger with the half-finished resistance of roasting, the temperature difference formed in galvanization is also large, easily cracks waste product.And when the graphitization metallurgical coke adopting resistance lower is resistance material, when starting to be energized, furnace core resistance is less, and the change of furnace core resistance is also less in galvanization, be conducive to the temperature difference reducing each position of combustion chamber like this, can be unlikely to increase crackle waste product with ascending power energising faster, this is very important to production large gauge product, but has influence on the half-finished ash value of roasting due to the higher meeting of the ash rate of graphitization metallurgical coke own.Therefore how finding a kind of applicable resistance material is nowadays main research direction.
In view of this, special proposition the present invention.
Summary of the invention
The first object of the present invention is to provide a kind of resistance material, and described resistance material has reduction graphitization product ash content, improves the advantages such as graphite rate.
The second object of the present invention is the using method providing a kind of resistance material, and the using method of described resistance material has the advantages such as effective raising roasted product heat rate.
In order to realize above-mentioned purpose of the present invention, spy by the following technical solutions:
Embodiments provide a kind of resistance material, be the residual matter of pitch, the performance index of the residual matter of described pitch are as follows: content of ashes is less than 1%, and volatile matter content is less than 1%, and granularity is 10-30mm.
Preferably, the performance index of the residual matter of described pitch are as follows: content of ashes is less than 0.8%, and volatile matter content is less than 0.8%, and granularity is 10-20mm.
Preferably, the performance index of the residual matter of described pitch are as follows: content of ashes is less than 0.7%, and volatile matter content is less than 0.7%, and granularity is 15-20mm.
Preferably, the performance index of the residual matter of described pitch are as follows: content of ashes is less than 0.5%, and volatile matter content is less than 0.5%, and granularity is 18-25mm.
A kind of resistance material that the embodiment of the present invention provides, due to using residual for pitch matter as resistance material, meet the requirement of resistance material gray scale and the few requirement of volatile matter content, density needs to be greater than petroleum coke simultaneously, like this, the resistance of the residual matter of pitch is also higher, calculate according to Joule law, the heat that resistance material produces can be more, make the temperature of roasting product also higher, more than 3000 DEG C can be reached, improve graphite rate, enable the purity of the graphitization product produced reach 98% and more than, these advantages be all use in prior art graphitization metallurgical coke or graphitized coke incomparable, the consumption of the residual matter of pitch also will be less than graphitization metallurgical coke or metallurgical coke simultaneously, because in the residual matter of pitch, volatile matter content is lower, long-time heating, the mass attenuation of the residual matter of pitch is little, do not need to supplement, heat production can not reduce too much, can heat roasting product efficiently.
Preferably, the residual matter of described pitch is tunnel cave after baking gained.
Preferably, the residual matter of described pitch is formula baking furnace roasting gained at the bottom of car.
The residual matter of described pitch is mainly derived from and obtains after roasted product in formula baking furnace at the bottom of tunnel cave after baking stove and car, and property indices such as volatile matter, ash content all can meet the standard of resistance material.
Embodiments provide a kind of using method of resistance material, comprise the steps: that, by described resistance material and roasting after roasted product mixes in graphitizing furnace, after roast, the purity of the graphitization product of gained is more than 98%.
Preferably, the temperature of carrying out roasting in graphitizing furnace is 3000-3200 DEG C.
Preferably, the purity of described graphitization product is more than 99%.
Preferably, the ash content of described graphitization product is less than 0.5%.
The using method of the resistance material that the embodiment of the present invention provides, improve the graphite rate of roasted product, decrease crackle percent defective, and the gray scale of product is lower, purity is high.
Compared with prior art, beneficial effect of the present invention is:
(1) due to using residual for pitch matter as resistance material, meet the requirement of resistance material gray scale and the few requirement of volatile matter content, density needs to be greater than petroleum coke simultaneously, and the resistance of the residual matter of pitch is also higher, the heat that corresponding resistance material produces can be more, make the temperature of roasting product also higher;
(2) purity of the graphitization product produced can reach 98% and more than;
(3) consumption of the residual matter of pitch is less than graphitization metallurgical coke or metallurgical coke simultaneously, because in the residual matter of pitch, volatile matter content is lower, and long-time heating, the mass attenuation of the residual matter of pitch is little, do not need to supplement, heat production can not reduce too much, can heat roasting product efficiently.
Embodiment
Below in conjunction with embodiment, embodiment of the present invention are described in detail, but it will be understood to those of skill in the art that the following example only for illustration of the present invention, and should not be considered as limiting the scope of the invention.Unreceipted actual conditions person in embodiment, the condition of conveniently conditioned disjunction manufacturer suggestion is carried out.Agents useful for same or the unreceipted production firm person of instrument, be and can buy by commercially available the conventional products obtained.
Embodiment 1
The using method of resistance material is as follows:
By resistance material and roasting after roasted product mixes in graphitizing furnace, resistance material is content of ashes is less than 1%, and volatile matter content is less than 1%, and granularity is the residual matter of pitch of 10-30mm, after roast, the purity of the graphitization product of gained is 99%, and ash content is 0.3%.
Embodiment 2
The using method of resistance material is as follows:
By resistance material and roasting under the condition of temperature 3000-3200 DEG C after roasted product mixes in graphitizing furnace, resistance material is content of ashes is less than 0.8%, volatile matter content is less than 0.8%, granularity is the residual matter of pitch of 10-20mm, the residual matter of pitch is tunnel cave after baking gained, after roast, the purity of the graphitization product of gained is 99%, and ash content is 0.4%.
Embodiment 3
The using method of resistance material is as follows:
By resistance material and roasting under the condition of temperature 3000-3200 DEG C after roasted product mixes in graphitizing furnace, resistance material is content of ashes is less than 0.7%, volatile matter content is less than 0.7%, granularity is the residual matter of pitch of 10-20mm, the residual matter of pitch is tunnel cave after baking gained, after roast, the purity of the graphitization product of gained is 99%, and ash content is 0.3%.
Embodiment 4
The using method of resistance material is as follows:
By resistance material and roasting under the condition of temperature 3000-3200 DEG C after roasted product mixes in graphitizing furnace, resistance material is content of ashes is less than 0.5%, volatile matter content is less than 0.5%, granularity is the residual matter of pitch of 18-25mm, the residual matter of pitch is tunnel cave after baking gained, after roast, the purity of the graphitization product of gained is 99%, and ash content is 0.4%.
Embodiment 5
The using method of resistance material is as follows:
By resistance material and roasting under the condition of temperature 3000-3200 DEG C after roasted product mixes in graphitizing furnace, resistance material is content of ashes is 0.7%, volatile matter content is less than 0.8%, granularity is the residual matter of pitch of 15-20mm, the residual matter of pitch is tunnel cave after baking gained, after roast, the purity of the graphitization product of gained is 98%, and ash content is 0.2%.
Embodiment 6
The using method of resistance material is as follows:
By resistance material and roasting under the condition of temperature 3000-3200 DEG C after roasted product mixes in graphitizing furnace, resistance material is content of ashes is less than 0.8%, volatile matter content is less than 0.8%, granularity is the residual matter of pitch of 10-20mm, the residual matter of pitch is formula baking furnace roasting gained at the bottom of car, after roast, the purity of the graphitization product of gained is 99%, and ash content is 0.4%.
Embodiment 7
The using method of resistance material is as follows:
By resistance material and roasting under the condition of temperature 3000-3200 DEG C after roasted product mixes in graphitizing furnace, resistance material is content of ashes is less than 0.8%, volatile matter content is 0.6%, granularity is the residual matter of pitch of 10-30mm, the residual matter of pitch is formula baking furnace roasting gained at the bottom of car, after roast, the purity of the graphitization product of gained is 99%, and ash content is 0.1%.
Embodiment 8
The using method of resistance material is as follows:
By resistance material and roasting under the condition of temperature 3000-3200 DEG C after roasted product mixes in graphitizing furnace, resistance material is content of ashes is 0.5%, volatile matter content is 0.8%, granularity is the residual matter of pitch of 15-20mm, the residual matter of pitch is tunnel cave after baking gained, after roast, the purity of the graphitization product of gained is 99%, and ash content is 0.2%.
Embodiment 9
The using method of resistance material is as follows:
By resistance material and roasting under the condition of temperature 3000-3200 DEG C after roasted product mixes in graphitizing furnace, resistance material is content of ashes is less than 0.8%, volatile matter content is less than 0.8%, granularity is the residual matter of pitch of 10-30mm, the residual matter of pitch is formula baking furnace roasting gained at the bottom of tunnel cave after baking gained and car, after roast, the purity of the graphitization product of gained is 99%, and ash content is 0.3%.
Embodiment 10
The using method of resistance material is as follows:
By resistance material and roasting under the condition of temperature 3000-3200 DEG C after roasted product mixes in graphitizing furnace, resistance material is content of ashes is 0.4%, volatile matter content is 0.4%, granularity is the residual matter of pitch of 18mm, the residual matter of pitch is formula baking furnace roasting gained at the bottom of tunnel cave after baking gained and car, after roast, the purity of the graphitization product of gained is 99.5%, and ash content is 0.2%.
Embodiment 11
The using method of resistance material is as follows:
By resistance material and roasting under the condition of temperature 3000-3200 DEG C after roasted product mixes in graphitizing furnace, resistance material is content of ashes is less than 0.8%, volatile matter content is less than 0.8%, granularity is the residual matter of pitch of 13mm, the residual matter of pitch is tunnel cave after baking gained, after roast, the purity of the graphitization product of gained is 98.5%, and ash content is 0.3%.
Embodiment 12
The using method of resistance material is as follows:
By resistance material and roasting under the condition of temperature 3100 DEG C after roasted product mixes in graphitizing furnace, resistance material is content of ashes is 0.5%, volatile matter content is 0.5%, granularity is the residual matter of pitch of 19mm, the residual matter of pitch is tunnel cave after baking gained, after roast, the purity of the graphitization product of gained is 98.5%, and ash content is 0.35%.
Embodiment 13
The using method of resistance material is as follows:
By resistance material and roasting under the condition of temperature 3200 DEG C after roasted product mixes in graphitizing furnace, resistance material is content of ashes is 0.7%, volatile matter content is 0.8%, granularity is the residual matter of pitch of 24mm, the residual matter of pitch is and formula baking furnace roasting gained at the bottom of car, after roast, the purity of the graphitization product of gained is 99%, and ash content is 0.25%.
Experimental example 1
Adopt graphitization metallurgical coke (comparative example 1) and metallurgical coke (comparative example 2) to compare with the indices of the graphitization product obtained after roasted product roasting in the indices of the graphitization product obtained in graphitizing furnace and after roasted product roasting by the resistance material of embodiment of the present invention 1-13 and prior art, specific targets are as shown in table 1 below:
Table 1 comparing result
| Group | Purity (%) | Ash content (%) |
| Embodiment 1 | 99 | 0.3 |
| Embodiment 2 | 99 | 0.4 |
| Embodiment 3 | 99 | 0.3 |
| Embodiment 4 | 99 | 0.4 |
| Embodiment 5 | 98 | 0.2 |
| Embodiment 6 | 99 | 0.4 |
| Embodiment 7 | 99 | 0.1 |
| Embodiment 8 | 99 | 0.2 |
| Embodiment 9 | 99 | 0.3 |
| Embodiment 10 | 99.5 | 0.2 |
| Embodiment 11 | 98.5 | 0.3 |
| Embodiment 12 | 98.5 | 0.35 |
| Embodiment 13 | 99 | 0.25 |
| Comparative example 1 | 92 | 0.9-1 |
| Comparative example 2 | 93 | 0.9-1 |
As can be seen from Table 1, the resistance material that the embodiment of the present invention provides can allow the property indices of graphitization product all more excellent, and it can give roasting product and produces more heat in graphited process, consumption is also less, do not need follow-up supplementary resistance material, reduce production cost, and energy saving, improve the efficiency of heating surface.Take full advantage of the residual matter of pitch, saved resource, achieve the recycling of resource, if be not used to the residual matter of the pitch produced in baking furnace, to carry out reprocessing cost to it also very high.
Although illustrate and describe the present invention with specific embodiment, however it will be appreciated that can to make when not deviating from the spirit and scope of the present invention many other change and amendment.Therefore, this means to comprise all such changes and modifications belonged in the scope of the invention in the following claims.
Claims (10)
1. a resistance material, is characterized in that, be the residual matter of pitch, the performance index of the residual matter of described pitch are as follows: content of ashes is less than 1%, and volatile matter content is less than 1%, and granularity is 10-30mm.
2. a kind of resistance material according to claim 1, is characterized in that, the performance index of the residual matter of described pitch are as follows: content of ashes is less than 0.8%, and volatile matter content is less than 0.8%, and granularity is 10-20mm.
3. a kind of resistance material according to claim 1, is characterized in that, the performance index of the residual matter of described pitch are as follows: content of ashes is less than 0.7%, and volatile matter content is less than 0.7%, and granularity is 15-20mm.
4. a kind of resistance material according to claim 1, is characterized in that, the performance index of the residual matter of described pitch are as follows: content of ashes is less than 0.5%, and volatile matter content is less than 0.5%, and granularity is 18-25mm.
5. a kind of resistance material according to any one of claim 1-4, is characterized in that, the residual matter of described pitch is tunnel cave after baking gained.
6. a kind of resistance material according to any one of claim 1-4, is characterized in that, the residual matter of described pitch is formula baking furnace roasting gained at the bottom of car.
7. the using method of a kind of resistance material described in any one of claim 1-6, it is characterized in that, comprise the steps: that, by described resistance material and roasting after roasted product mixes in graphitizing furnace, after roast, the purity of the graphitization product of gained is more than 98%.
8. the using method of a kind of resistance material according to claim 7, is characterized in that, the temperature of carrying out roasting in graphitizing furnace is 3000-3200 DEG C.
9. the using method of a kind of resistance material according to claim 7, is characterized in that, the purity of described graphitization product is more than 99%.
10. the using method of a kind of resistance material according to claim 1, is characterized in that, the ash content of described graphitization product is less than 0.5%.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108892135A (en) * | 2018-06-22 | 2018-11-27 | 山西能源学院 | Resistance filler progress graphitizing method in Acheson's type graphitizing furnace is done using roasting is broken |
| CN110655074A (en) * | 2019-09-30 | 2020-01-07 | 广东凯金新能源科技股份有限公司 | Low-cost long-cycle graphite for energy storage and preparation method thereof |
| CN115417405A (en) * | 2022-09-27 | 2022-12-02 | 贵州东岛新能源材料有限公司 | Preparation method of resistance material and negative electrode material for Acheson graphitizing furnace |
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| CN108892135B (en) * | 2018-06-22 | 2021-08-06 | 山西能源学院 | Method for graphitizing by using roasted fragments as resistance filler in Acheson type graphitizing furnace |
| CN110655074A (en) * | 2019-09-30 | 2020-01-07 | 广东凯金新能源科技股份有限公司 | Low-cost long-cycle graphite for energy storage and preparation method thereof |
| CN115417405A (en) * | 2022-09-27 | 2022-12-02 | 贵州东岛新能源材料有限公司 | Preparation method of resistance material and negative electrode material for Acheson graphitizing furnace |
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