CN108264367A - A kind of enhancing Delanium connector - Google Patents

A kind of enhancing Delanium connector Download PDF

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Publication number
CN108264367A
CN108264367A CN201711403331.XA CN201711403331A CN108264367A CN 108264367 A CN108264367 A CN 108264367A CN 201711403331 A CN201711403331 A CN 201711403331A CN 108264367 A CN108264367 A CN 108264367A
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Prior art keywords
delanium
enhancing
connector
product
carbon fiber
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Inventor
刘运平
路培中
冯俊杰
杜爱芳
陈文来
张胜恩
张谦
周浩
李悦
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KAIFENG CARBON CO Ltd CHINA PINGMEI SHENMA GROUP
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KAIFENG CARBON CO Ltd CHINA PINGMEI SHENMA GROUP
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Priority to CN201711403331.XA priority Critical patent/CN108264367A/en
Publication of CN108264367A publication Critical patent/CN108264367A/en
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    • C21—METALLURGY OF IRON
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Abstract

The invention belongs to graphite electrode technical fields, and in particular to a kind of enhancing Delanium connector, it is raw materials used to be：Needle coke, asphalt base carbon fiber, modified coal tar pitch, plasticizer, brilliant swollen inhibitor.Present invention enhancing Delanium connector has the characteristics that bending strength is high, compression strength height, resistivity is low, coefficient of thermal expansion is low, makes steel accident caused by greatly reducing the fractureing of Graphite nipple in Steelmaking Process With Super High Power Arc Furnace, reduces the production cost of user.

Description

A kind of enhancing Delanium connector
Technical field
The invention belongs to graphite electrode technical fields, and in particular to a kind of enhancing Delanium connector.
Background technology
Traditional Delanium connector passes through dispensing, kneading, molding, roasting by needle coke, petroleum coke, coal tar pitch for raw material It burns, dipping, graphitization, machine formation, for electric furnace arrangement for producing steel as conductive material.The flexural strength of Graphite nipple is to weigh to lead The key index of electric electrode column quality, the problem that fractures of the graphite column occurred in steel-making, more than 80% is since graphite connects Head intensity it is low caused by.The low Graphite nipple of flexural strength easily snaps off in steel-making, causes steel-making accident, influences steel mill's life Production increases steel mill's cost.Traditional Graphite nipple material composition：Coke quality percentage is about 80%, coal tar pitch quality percentage Material mechanical performance than being about 20% preparation is smaller, in use, easily because of Graphite nipple on the electric arc furnaces smelted in high current Mechanical strength deficiency graphite column is caused to fracture, cause steel-making accident.Moreover, traditional manufacturing technique method is using more Secondary dipping and roasting technique, the period is long, of high cost.
Invention content
In view of this, the purpose of the present invention is to provide a kind of enhancing Delanium connector, the intensity of the Graphite nipple is high, Good conductivity.
The technical solution adopted in the present invention is：
A kind of enhancing Delanium connector, is made of the raw material of following mass fractions：73~79 parts of needle coke, modified coal tar pitch 21 ~27 parts, 0.4~0.6 part of plasticizer, 0.5~0.8 part of brilliant swollen inhibitor and asphalt base carbon fiber, the dosage of asphalt base carbon fiber 2-5wt % for other raw material summations.
The requirement of the asphalt base carbon fiber is：4~6mm of length, 1.95~2.0g/cm of density3, modulus 160~ 190GPa, 2200~2400MPa of tensile strength.
The plasticizer is stearic acid or oleic acid, and the swollen inhibitor of crystalline substance is brown iron oxide or chromated oxide.
Include the following steps during the preparation of above-mentioned enhancing Delanium connector：
1）Each raw material is taken in proportion；
2）Needle coke is crushed, sieve, is milled, by 30-45wt% particulate materials（0.5-2mm）With 55-70 wt % powders（0- 0.075mm）Composition；
3）By asphalt base carbon fiber dispersant decentralized processing, homodisperse prefabricated carbon fiber material is formed；
4）Needle coke and prefabricated carbon fiber material are mixed and heated to 180~200 DEG C；
5）By step 4）Raw material after heating is sent into kneading machine, sequentially adds modified coal tar pitch, brilliant swollen inhibitor, plasticizer and is mixed Kneading obtains thickener；
6）By step 5）Thickener obtained is sent into extruder molding, and molded product is made；
7）By step 6）Die mould product obtained are packed into saggar, are sent into underbody formula roaster and are roasted to obtain a burning product；
8）By step 7）An obtained burning product carry out shell cleaning, are then impregnated to obtain pickled product；
9）By step（8）Pickled product be sent into underbody formula roaster roasted to obtain two burning product；
10）By step 9）Two burning product join end to end be packed into cascade graphitizing furnaces be graphitized to obtain graphitization product；
11）To by step 10）Graphitization product be processed, be made regulation requirement Graphite nipple.
The step 5）The control of middle kneading temperature is at 160~180 DEG C, 30~50 minutes kneading time.
The step 6）Middle 1800~2000 tons of briquetting pressure, 125~135 DEG C of forming temperature, die mould product density 1.85~ 1.88g/cm3。
The step 7）Heating rate is controlled in 2~10 DEG C/h during middle roasting, is warming up to 1000 DEG C, is then gradually cooled down （10-15℃/h）250 DEG C are cooled to come out of the stove.
The step 8）Middle 300~350 DEG C of dipping temperature, impregnation pressure 1.5MPa.
The step 9）Middle heating rate is controlled in 5~15 DEG C/h, is warming up to 1000 DEG C, is then gradually cooled down（10-15 ℃/h）250 DEG C are cooled to come out of the stove；The step 10）Middle 3000~3100 DEG C of graphitization temperature, then gradually cools down（10-15 ℃/h）250 DEG C are cooled to come out of the stove.
Carbon fiber is the inorganic polymer fiber that phosphorus content is higher than 90%, and microstructure has quality similar to Delanium Gently, the features such as intensity height, high temperature resistant, conduction, antifatigue, creep resistant, research staff of the invention has found to drip in the course of the research Green base carbon fibre has good compatibility performance and interfacial combined function with carbon base body, can significantly increase the intensive properties of carbon materials Can, final product Delanium connector obtained is with bending strength is high, compression strength is high, resistivity is low, coefficient of thermal expansion is low The characteristics of, accident is made steel caused by greatly reducing the fractureing of Graphite nipple in Steelmaking Process With Super High Power Arc Furnace, reduces user Production cost.In the preparation, it using the roasting of the underbody formula of short route and internal thermal serial graphitized technique, greatly reduces repeatedly The work that dipping and repetition are reburned, shortens the production cycle, reduces cost of manufacture.
Description of the drawings
Fig. 1 is the process flow chart of the present invention.
Specific embodiment
Illustrate the specific embodiment of the present invention with reference to the accompanying drawings and examples, but following embodiment is used only in detail It describes the bright present invention in detail, does not limit the scope of the invention in any way.
Embodiment 1：
A kind of enhancing Delanium connector, is made of the raw material of following mass fractions：73 parts of needle coke, 26 parts of modified coal tar pitch, drip Green 5 parts of base carbon fibre, 0.4 part of plasticizer, brilliant swollen 0.8 part of inhibitor.
The requirement of the asphalt base carbon fiber is：4~6mm of length, 1.95~2.0g/cm of density3, modulus 160~ 190GPa, 2200~2400MPa of tensile strength.
The plasticizer is stearic acid, and the swollen inhibitor of crystalline substance is brown iron oxide.
Include the following steps during preparation：
1）Each raw material is taken in proportion；
2）Needle coke is crushed, sieve, is milled, by 30wt% particulate materials（0.5-2mm）With 70 wt % powders（0-0.075mm）Group Into；
3）By asphalt base carbon fiber dispersant decentralized processing, homodisperse prefabricated carbon fiber material is formed；
4）Needle coke and prefabricated carbon fiber material are mixed and heated to 180 DEG C；
5）By step 4）Raw material after heating is sent into kneading machine, sequentially adds modified coal tar pitch, brilliant swollen inhibitor, plasticizer and is mixed It pinches, thickener is made in 160 DEG C, 50 minutes kneading time in kneading temperature control；
6）By step 5）Thickener obtained is sent into extruder molding, 1800 tons of briquetting pressure, and molding is made in 125 DEG C of forming temperature Product, die mould product density 1.85g/cm3；
7）By step 6）Die mould product obtained are packed into saggar, are sent into underbody formula roaster and are roasted, heating rate is controlled 2 DEG C/h, 1000 DEG C are warming up to, is then gradually cooled down（10℃/h）It is cooled to 250 DEG C to come out of the stove, obtains a burning product；
8）By step 7）An obtained burning product carry out shell cleaning, are then impregnated, 300 DEG C of dipping temperature, impregnation pressure 1.5MPa obtains pickled product；
9）By step（8）Pickled product be sent into underbody formula roaster and roasted, heating rate control is warming up in 5 DEG C/h 1000 DEG C, then gradually cooling down is come out of the stove to 250 DEG C, obtains two burning product；
10）By step 9）Two burning product join end to end be packed into cascade graphitizing furnaces be graphitized to obtain graphitization product；
11）To by step 10）Graphitization product be processed, 3000 DEG C of graphitization temperature, then gradually cooling down to 250 DEG C It comes out of the stove, the Graphite nipple of regulation requirement is made.
Embodiment 2：
A kind of enhancing Delanium connector, is made of the raw material of following mass fractions：79 parts of needle coke, 21 parts of modified coal tar pitch, drip Green 2.5 parts of base carbon fibre, 0.4 part of plasticizer, brilliant swollen 0.5 part of inhibitor.
Include the following steps during preparation：
1）Each raw material is taken in proportion；
2）Needle coke is crushed, sieve, is milled, by 40wt% particulate materials（0.5-2mm）With 60 wt % powders（0-0.075mm）Group Into；
3）By asphalt base carbon fiber dispersant decentralized processing, homodisperse prefabricated carbon fiber material is formed；
4）Needle coke and prefabricated carbon fiber material are mixed and heated to 190 DEG C；
5）By step 4）Raw material after heating is sent into kneading machine, sequentially adds modified coal tar pitch, brilliant swollen inhibitor, plasticizer and is mixed It pinches, thickener is made in 170 DEG C, 40 minutes kneading time in kneading temperature control；
6）By step 5）Thickener obtained is sent into extruder molding, 1900 tons of briquetting pressure, and molding is made in 130 DEG C of forming temperature Product, die mould product density 1.86g/cm3；
7）By step 6）Die mould product obtained are packed into saggar, are sent into underbody formula roaster and are roasted, heating rate is controlled 6 DEG C/h, 1000 DEG C are warming up to, then gradually cooling down is come out of the stove to 250 DEG C, obtains a burning product；
8）By step 7）An obtained burning product carry out shell cleaning, are then impregnated, 320 DEG C of dipping temperature, impregnation pressure 1.5MPa obtains pickled product；
9）By step（8）Pickled product be sent into underbody formula roaster and roasted, heating rate control is warming up in 10 DEG C/h 1000 DEG C, then gradually cooling down is come out of the stove to 250 DEG C, obtains two burning product；
10）By step 9）Two burning product join end to end be packed into cascade graphitizing furnaces be graphitized to obtain graphitization product；
11）To by step 10）Graphitization product be processed, then 3050 DEG C of graphitization temperature gradually cools down（12℃/h）It is cold But it comes out of the stove to 250 DEG C, the Graphite nipple of regulation requirement is made.
Embodiment 3：
A kind of enhancing Delanium connector, is made of the raw material of following mass fractions：76 parts of needle coke, 23 parts of modified coal tar pitch, drip Green 3.5 parts of base carbon fibre, 0.5 part of plasticizer, brilliant swollen 0.7 part of inhibitor.
Include the following steps during preparation：
1）Each raw material is taken in proportion；
2）Needle coke is crushed, sieve, is milled, by 45wt% particulate materials（0.5-2mm）With 55 wt % powders（0-0.075mm）Group Into；
3）By asphalt base carbon fiber dispersant decentralized processing, homodisperse prefabricated carbon fiber material is formed；
4）Needle coke and prefabricated carbon fiber material are mixed and heated to 200 DEG C；
5）By step 4）Raw material after heating is sent into kneading machine, sequentially adds modified coal tar pitch, brilliant swollen inhibitor, plasticizer and is mixed It pinches, thickener is made in 180 DEG C, 30 minutes kneading time in kneading temperature control；
6）By step 5）Thickener obtained is sent into extruder molding, 2000 tons of briquetting pressure, and molding is made in 135 DEG C of forming temperature Product, die mould product density 1.88g/cm3；
7）By step 6）Die mould product obtained are packed into saggar, are sent into underbody formula roaster and are roasted, heating rate is controlled 10 DEG C/h, 1000 DEG C are warming up to, is then gradually cooled down（15℃/h）It is cooled to 250 DEG C to come out of the stove, obtains a burning product；
8）By step 7）An obtained burning product carry out shell cleaning, are then impregnated, 350 DEG C of dipping temperature, impregnation pressure 1.5MPa obtains pickled product；
9）By step（8）Pickled product be sent into underbody formula roaster and roasted, heating rate control is warming up in 15 DEG C/h 1000 DEG C, then gradually cooling down is come out of the stove to 250 DEG C, obtains two burning product；
10）By step 9）Two burning product join end to end be packed into cascade graphitizing furnaces be graphitized to obtain graphitization product；
11）To by step 10）Graphitization product be processed, 3100 DEG C of graphitization temperature, then gradually cooling down to 250 DEG C It comes out of the stove, the Graphite nipple of regulation requirement is made.
Embodiment 4：
A kind of enhancing Delanium connector, is made of the raw material of following mass fractions：73 parts of needle coke, 27 parts of modified coal tar pitch, drip Green 4 parts of base carbon fibre, 0.4 part of plasticizer, brilliant swollen 0.7 part of inhibitor.
Preparation process is the same as embodiment 2.
Embodiment 5：
A kind of enhancing Delanium connector, is made of the raw material of following mass fractions：77 parts of needle coke, 24 parts of modified coal tar pitch, drip Green 3 parts of base carbon fibre, 0.6 part of plasticizer, brilliant swollen 0.5 part of inhibitor.
Preparation process is the same as embodiment 3.
It is strong to the density, the anti-folding that enhance Delanium connector made from embodiment 1-5 in order to verify the feasibility of the present invention Degree, resistivity, coefficient of thermal expansion and ash content are detected, and testing result see the table below：
Found out by data above, compared with the common ultra high power graphite electrode in market, enhancing Delanium connector of the invention Density, flexural strength is improved, resistivity is reduced, performance greatly promotes.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, this field is common Other modifications or equivalent replacement that technical staff makes technical scheme of the present invention, without departing from technical solution of the present invention Spirit and scope, be intended to be within the scope of the claims of the invention.

Claims (3)

1. a kind of enhancing Delanium connector, which is characterized in that be made of the raw material of following mass fractions：Needle coke 73~79 Part, 21~27 parts of modified coal tar pitch, 0.4~0.6 part of plasticizer, 0.5~0.8 part of brilliant swollen inhibitor and asphalt base carbon fiber, pitch The dosage of base carbon fibre is the 2-5 wt % of other raw material summations.
2. enhancing Delanium connector according to claim 1, it is characterised in that：The requirement of the asphalt base carbon fiber For：4~6mm of length, 1.95~2.0g/cm of density3, 160~190GPa of modulus, 2200~2400MPa of tensile strength.
3. enhancing Delanium connector according to claim 1, it is characterised in that：The plasticizer is stearic acid or oil Acid, the swollen inhibitor of crystalline substance are brown iron oxide or chromated oxide.
CN201711403331.XA 2017-12-22 2017-12-22 A kind of enhancing Delanium connector Pending CN108264367A (en)

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