CN109231987A - A kind of electric arc furnaces graphite electrode preparation method - Google Patents
A kind of electric arc furnaces graphite electrode preparation method Download PDFInfo
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- CN109231987A CN109231987A CN201811046037.2A CN201811046037A CN109231987A CN 109231987 A CN109231987 A CN 109231987A CN 201811046037 A CN201811046037 A CN 201811046037A CN 109231987 A CN109231987 A CN 109231987A
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Abstract
The invention discloses a kind of electric arc furnaces graphite electrode preparation methods, comprising the following steps: (1) takes petroleum coke particles 50-60%, alchlor powder 3-6%, calcium oxide 2-4%, graphite powder particle 10-20%, pitch 15-25%；It pours into kneading pot, heat up kneading；(3) pitch is heated to 150-180 DEG C of fusing, be added in kneading pot, heat up kneading；(4) material is imported in molding die, pressurization obtains blank to be roasted；(5) under the conditions of nitrogen protection atmosphere, it is warming up to 500-550 DEG C, heat preservation；It is continuously heating to 880-920 DEG C, roasting obtains green compact；(6) it is heated to 2300-2400 DEG C in high-temperature electric resistance furnace, keeps the temperature 24-72h, graphite electrode is prepared.Graphite electrode anit-oxidizing of the present invention is good, and cohesive force is strong, and fracture accident generation problem is well controlled in graphite electrode use process.
Description
Technical field
The present invention relates to a kind of graphite electrode preparation method, in particular to a kind of improved electric arc furnaces graphite electrode preparation side
Method belongs to Metallic Materials Held In Shanghai technical field.
Background technique
Electric arc furnaces is metallurgy, forges common high melt ore device in process, during arc melting, is put
Electric flux is several, and arc energy directly acts on smelting metal, and speed of melting is fast, for the impurity removal efficacies such as sulphur, phosphorus height.
It is raw material, coal tar pitch as bonding agent that graphite electrode, which is using petroleum coke, needle coke, the electrode material being processed into.In electric arc furnaces
In fusion process, graphite electrode carries out heating melting to furnace charge with electrical arc release electric energy, and graphite electrode directly carries melting
High current in the process, high-energy conveying.
Graphite electrode, since hot environment is by continuous consumption, includes graphite electrode in big electricity in smelting process among these
It banishes electricity and generates the distillation of high temperature caused by the high arc temperature of tip, electrode and air reaction oxidation consumption etc. in arc process.
The main reason for especially graphite electrode and high-temperature air oxidation consumption accounting is especially prominent, is graphite electrode consumption.
In the prior art, the problem big for graphite electrode consumption has attempted some techniques for reducing graphite electrode consumption,
Addition auxiliary agent is specifically included, the adhesive strength of graphite electrode is improved, promotes cohesive force, graphite electrode side continuous oxidation is reduced and disappears
Consumption.Alternatively, promoting the auxiliary agent of graphite electrode electric conductivity using addition, and increase the bulk density of machine-shaping, so that stone
The oxidation loss speed of electrode ink slows down.
But either conductive auxiliary agent or machine-shaping boost in pressure, the inhibition for reducing graphite electrode oxidation loss are made
With all very limited, the graphite electrode by optimization improvement still remains the big problem of oxidation loss in actual application,
Graphite electrode service life is not grown.
Summary of the invention
It is an object of the invention to overcome to aoxidize damage in the electric arc furnaces graphite electrode use process in the presence of the prior art
Consumption is big, and the deficiency that service life is not grown provides a kind of electric arc furnaces graphite electrode preparation method.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes:
A kind of electric arc furnaces graphite electrode preparation method, comprising the following steps:
(1) petroleum coke particles 50-60%, alchlor powder 3-6%, calcium oxide 2-4%, graphite are taken by weight percentage
Powder particles 10-20%, pitch 15-25%.
(2) first petroleum coke particles, alchlor powder, calcium oxide, graphite powder particle are imported in kneading pot, is heated up simultaneously
To 120-125 DEG C, kneading 10-60min；
(3) pitch is heated to 150-180 DEG C of fusing, be added in the kneading pot of step 2, control kneading pot is warming up to 150-
155 DEG C, then keep the temperature kneading 10-50min.
(4) after the completion of step 3 kneading, material is imported in molding die, is forced into 10-30MPa, pressure maintaining 5-40min is obtained
To blank to be roasted.
(5) will blank be roasted under the conditions of nitrogen protection atmosphere, with 3-10 DEG C/min heating rate, be warming up to 500-
550 DEG C, keep the temperature 0.5-3 days；It then proceedes to be warming up to 880-920 DEG C, and keeps the temperature roasting 5-10 days, obtain green compact.
(6) green compact that step 5 is roasting are heated to 2300-2400 DEG C in high-temperature electric resistance furnace, keep the temperature 24-72h, preparation
Obtain graphite electrode.
Graphite electrode preparation method of the present invention selects petroleum coke particles, alchlor powder, calcium oxide as material composition,
Graphite electrode cohesive force is promoted by being mixed into part alchlor powder and calcium oxide.And material composition kneading technique is controlled, first
Guarantee that alchlor powder and calcium oxide are uniformly mixed in basestocks, pitch is then added and carries out kneading, obtains hair to be roasted
Then base is converted into green compact by two-step method roasting, last green compact are heated to the high temperature spent 2,000 more in high-temperature electric resistance furnace, finally
High-quality graphite electrode is made.
Further, step 1, during raw material is taken, the mixing total amount of alchlor and calcium oxide is 6-8%.
Further, step 1, petroleum coke particles 55-60%, alchlor powder 4-6%, calcium oxide are taken by weight percentage
2-3%, graphite powder particle 12-18%, pitch 15-23%.
Further, step 2, first petroleum coke particles and graphite powder particle are added in kneading pot, then several times by three oxygen
Change aluminium powder and calcium oxide is added.Preferably, alchlor and calcium oxide are at least added in three times.
Further, step 3, pitch is heated to 150-180 DEG C, keeps the temperature 5-20 minutes, the kneading pot of step 2 is then added
In.Pitch is sufficiently melted in advance, part volatile component is removed in volatilization.
Further, step 4, pressurize 20-30MPa, pressure maintaining 10-30min.
Further, step 5, it first is warming up to 500-550 DEG C with 3-8 DEG C/min heating rate, keeps the temperature 1-2 days.Roasting initial stage
The vaporized components for discharging volatile component and release reaction generation, keep heating rate mild, sufficiently discharge, avoid internal holes
Hole or gap accumulation.
Compared with prior art, beneficial effects of the present invention:
1, graphite electrode preparation method addition of the present invention increases using alchlor powder, calcium oxide as auxiliary material ingredient
Strong graphite electrode anit-oxidizing stability, promotes graphite electrode cohesive force, reduces fracture accident in graphite electrode use process and occurs.
2, graphite electrode preparation method of the present invention is first protected for the characteristic for adding auxiliary component, optimizing raw material kneading technique
It demonstrate,proves alchlor powder and calcium oxide to be uniformly mixed in basestocks, pitch is then added and carries out kneading, obtains blank to be roasted,
Alchlor and calcium oxide dispersity in graphite electrode are good, and comprehensive performance inoxidizability is promoted significant.
3, graphite electrode preparation method of the present invention roasts green compact using two-step method, so that volatility group inside graphite electrode
Get sufficiently release, graphite electrode is not easy in use because fracture accident occurs in defect mislead.
Specific embodiment
Below with reference to test example and specific embodiment, the present invention is described in further detail.But this should not be understood
It is all that this is belonged to based on the technology that the content of present invention is realized for the scope of the above subject matter of the present invention is limited to the following embodiments
The range of invention.
<embodiment 1>
A kind of electric arc furnaces graphite electrode preparation method, comprising the following steps:
(1) petroleum coke particles 57%, alchlor powder 5%, calcium oxide 3%, graphite powder particle are taken by weight percentage
15%, pitch 20%.
(2) first petroleum coke particles, alchlor powder, calcium oxide, graphite powder particle are imported in kneading pot, is heated up simultaneously
To 122 DEG C, kneading 30min；
(3) pitch is heated to 160 DEG C of fusings, be added in the kneading pot of step 2, control kneading pot is warming up to 155 DEG C, so
Kneading 20min is kept the temperature afterwards.
(4) after the completion of step 3 kneading, by material import molding die in, be forced into 20MPa, pressure maintaining 20min, obtain to
Roast blank.
(5) will blank be roasted under the conditions of nitrogen protection atmosphere, with 10 DEG C/min heating rate, be warming up to 500 DEG C, protect
Temperature 3 days；It then proceedes to be warming up to 890 DEG C, and keeps the temperature roasting 7 days, obtain green compact.
(6) green compact that step 5 is roasting are heated to 2320 DEG C in high-temperature electric resistance furnace, keep the temperature 48h, graphite is prepared
Electrode.
<embodiment 2>
A kind of electric arc furnaces graphite electrode preparation method, comprising the following steps:
(1) petroleum coke particles 54%, alchlor powder 4%, calcium oxide 2%, graphite powder particle are taken by weight percentage
15%, pitch 25%.
(2) first petroleum coke particles, graphite powder particle are imported in kneading pot, alchlor powder, calcium oxide total amount is added
1/3, be warming up to 122 DEG C, kneading 5 minutes, be added alchlor powder, calcium oxide total amount 1/3, kneading 5 minutes, be added surplus
Excess-three alumina powder, calcium oxide continue kneading 20min；
(3) pitch is heated to 160 DEG C of fusings, be added in the kneading pot of step 2, control kneading pot is warming up to 155 DEG C, so
Kneading 20min is kept the temperature afterwards.
(4) after the completion of step 3 kneading, by material import molding die in, be forced into 20MPa, pressure maintaining 20min, obtain to
Roast blank.
(5) will blank be roasted under the conditions of nitrogen protection atmosphere, with 10 DEG C/min heating rate, be warming up to 500 DEG C, protect
Temperature 3 days；It then proceedes to be warming up to 890 DEG C, and keeps the temperature roasting 7 days, obtain green compact.
(6) green compact that step 5 is roasting are heated to 2320 DEG C in high-temperature electric resistance furnace, keep the temperature 48h, graphite is prepared
Electrode.
<embodiment 3>
A kind of electric arc furnaces graphite electrode preparation method, comprising the following steps:
(1) petroleum coke particles 60%, alchlor powder 3%, calcium oxide 3%, graphite powder particle are taken by weight percentage
10%, pitch 24%.
(2) first petroleum coke particles, graphite powder particle are imported in kneading pot, alchlor powder, calcium oxide total amount is added
1/3, be warming up to 122 DEG C, kneading 5 minutes, be added alchlor powder, calcium oxide total amount 1/3, kneading 5 minutes, be added surplus
Excess-three alumina powder, calcium oxide continue kneading 20min；
(3) pitch is heated to 170 DEG C of fusings, keeps the temperature 10min, then pitch is added in the kneading pot of step 2, control
Kneading pot is warming up to 155 DEG C, then keeps the temperature kneading 20min.
(4) after the completion of step 3 kneading, by material import molding die in, be forced into 30MPa, pressure maintaining 20min, obtain to
Roast blank.
(5) will blank be roasted under the conditions of nitrogen protection atmosphere, with 5 DEG C/min heating rate, be warming up to 500 DEG C, protect
Temperature 1 day；It then proceedes to be warming up to 890 DEG C, and keeps the temperature roasting 7 days, obtain green compact.
(6) green compact that step 5 is roasting are heated to 2320 DEG C in high-temperature electric resistance furnace, keep the temperature 48h, graphite is prepared
Electrode.
<embodiment 4>
A kind of electric arc furnaces graphite electrode preparation method, comprising the following steps:
(1) petroleum coke particles 53%, alchlor powder 5%, calcium oxide 2%, graphite powder particle are taken by weight percentage
18%, pitch 22%.
(2) first petroleum coke particles, graphite powder particle are imported in kneading pot, alchlor powder, calcium oxide total amount is added
1/3, be warming up to 125 DEG C, kneading 5 minutes, be added alchlor powder, calcium oxide total amount 1/3, kneading 5 minutes, be added surplus
Excess-three alumina powder, calcium oxide continue kneading 20min；
(3) pitch is heated to 160 DEG C of fusings, keeps the temperature 10min, then pitch is added in the kneading pot of step 2, control
Kneading pot is warming up to 155 DEG C, then keeps the temperature kneading 20min.
(4) after the completion of step 3 kneading, by material import molding die in, be forced into 30MPa, pressure maintaining 20min, obtain to
Roast blank.
(5) will blank be roasted under the conditions of nitrogen protection atmosphere, with 5 DEG C/min heating rate, be warming up to 550 DEG C, protect
Temperature 2 days；It then proceedes to be warming up to 890 DEG C, and keeps the temperature roasting 7 days, obtain green compact.
(6) green compact that step 5 is roasting are heated to 2350 DEG C in high-temperature electric resistance furnace, keep the temperature 48h, graphite is prepared
Electrode.
<embodiment 5>
A kind of electric arc furnaces graphite electrode preparation method, comprising the following steps:
(1) petroleum coke particles 53%, alchlor powder 5%, calcium oxide 2%, graphite powder particle are taken by weight percentage
18%, pitch 22%.
(2) first petroleum coke particles, graphite powder particle are imported in kneading pot, alchlor powder, calcium oxide total amount is added
1/3, be warming up to 125 DEG C, kneading 5 minutes, be added alchlor powder, calcium oxide total amount 1/3, kneading 5 minutes, be added surplus
Excess-three alumina powder, calcium oxide continue kneading 20min；
(3) pitch is heated to 160 DEG C of fusings, keeps the temperature 10min, then pitch is added in the kneading pot of step 2, control
Kneading pot is warming up to 155 DEG C, then keeps the temperature kneading 20min.
(4) after the completion of step 3 kneading, by material import molding die in, be forced into 25MPa, pressure maintaining 20min, obtain to
Roast blank.
(5) will blank be roasted under the conditions of nitrogen protection atmosphere, with 5 DEG C/min heating rate, be warming up to 550 DEG C, protect
Temperature 2 days；It then proceedes to be warming up to 900 DEG C, and keeps the temperature roasting 7 days, obtain green compact.
(6) green compact that step 5 is roasting are heated to 2350 DEG C in high-temperature electric resistance furnace, keep the temperature 48h, graphite is prepared
Electrode.
<comparative example 1>
A kind of electric arc furnaces graphite electrode preparation method, comprising the following steps:
(1) petroleum coke particles 53%, alchlor powder 5%, graphite powder particle 18%, pitch are taken by weight percentage
22%.
(2) first petroleum coke particles, graphite powder particle are imported in kneading pot, the 1/3 of alchlor powder total amount is added, risen
Temperature is added the 1/3 of alchlor powder total amount, kneading 5 minutes, remaining alchlor powder is added to 125 DEG C, kneading 5 minutes,
Continue kneading 20min；
(3) pitch is heated to 160 DEG C of fusings, keeps the temperature 10min, then pitch is added in the kneading pot of step 2, control
Kneading pot is warming up to 155 DEG C, then keeps the temperature kneading 20min.
(4) after the completion of step 3 kneading, by material import molding die in, be forced into 25MPa, pressure maintaining 20min, obtain to
Roast blank.
(5) will blank be roasted under the conditions of nitrogen protection atmosphere, with 5 DEG C/min heating rate, be warming up to 550 DEG C, protect
Temperature 2 days；It then proceedes to be warming up to 900 DEG C, and keeps the temperature roasting 7 days, obtain green compact.
(6) green compact that step 5 is roasting are heated to 2350 DEG C in high-temperature electric resistance furnace, keep the temperature 48h, graphite is prepared
Electrode.
<embodiment 6>
A kind of electric arc furnaces graphite electrode preparation method, comprising the following steps:
(1) petroleum coke particles 53%, alchlor powder 5%, calcium oxide 2%, graphite powder particle are taken by weight percentage
18%, pitch 22%.
(2) first petroleum coke particles, graphite powder particle are imported in kneading pot, alchlor powder, calcium oxide total amount is added
1/3, be warming up to 125 DEG C, kneading 5 minutes, be added alchlor powder, calcium oxide total amount 1/3, kneading 5 minutes, be added surplus
Excess-three alumina powder and calcium oxide continue kneading 20min；
(3) pitch is heated to 160 DEG C of fusings, keeps the temperature 10min, then pitch is added in the kneading pot of step 2, control
Kneading pot is warming up to 155 DEG C, then keeps the temperature kneading 20min.
(4) after the completion of step 3 kneading, by material import molding die in, be forced into 25MPa, pressure maintaining 15min, obtain to
Roast blank.
(5) will blank be roasted under the conditions of nitrogen protection atmosphere, with 4 DEG C/min heating rate, be warming up to 550 DEG C, protect
Temperature 2 days；It then proceedes to be warming up to 920 DEG C, and keeps the temperature roasting 7 days, obtain green compact.
(6) green compact that step 5 is roasting are heated to 2350 DEG C in high-temperature electric resistance furnace, keep the temperature 72h, graphite is prepared
Electrode.
<comparative example 2>
A kind of electric arc furnaces graphite electrode preparation method, comprising the following steps:
(1) petroleum coke particles 57%, alchlor powder 2%, calcium oxide 1%, graphite powder particle are taken by weight percentage
18%, pitch 22%.
(2) first petroleum coke particles, graphite powder particle are imported in kneading pot, alchlor powder, calcium oxide total amount is added
1/3, be warming up to 125 DEG C, kneading 5 minutes, be added alchlor powder, calcium oxide total amount 1/3, kneading 5 minutes, be added surplus
Excess-three alumina powder and calcium oxide continue kneading 20min；
(3) pitch is heated to 160 DEG C of fusings, keeps the temperature 10min, then pitch is added in the kneading pot of step 2, control
Kneading pot is warming up to 155 DEG C, then keeps the temperature kneading 20min.
(4) after the completion of step 3 kneading, by material import molding die in, be forced into 25MPa, pressure maintaining 15min, obtain to
Roast blank.
(5) will blank be roasted under the conditions of nitrogen protection atmosphere, with 4 DEG C/min heating rate, be warming up to 550 DEG C, protect
Temperature 2 days；It then proceedes to be warming up to 920 DEG C, and keeps the temperature roasting 7 days, obtain green compact.
(6) green compact that step 5 is roasting are heated to 2350 DEG C in high-temperature electric resistance furnace, keep the temperature 72h, graphite is prepared
Electrode.
<embodiment 7>
A kind of electric arc furnaces graphite electrode preparation method, comprising the following steps:
(1) petroleum coke particles 53%, alchlor powder 5%, calcium oxide 2%, graphite powder particle are taken by weight percentage
18%, pitch 22%.
(2) first petroleum coke particles, graphite powder particle are imported in kneading pot, alchlor powder, calcium oxide total amount is added
1/3, be warming up to 125 DEG C, kneading 5 minutes, be added alchlor powder, calcium oxide total amount 1/3, kneading 5 minutes, be added surplus
Excess-three alumina powder and calcium oxide continue kneading 20min；
(3) pitch is heated to 160 DEG C of fusings, keeps the temperature 10min, then pitch is added in the kneading pot of step 2, control
Kneading pot is warming up to 155 DEG C, then keeps the temperature kneading 20min.
(4) after the completion of step 3 kneading, by material import molding die in, be forced into 25MPa, pressure maintaining 15min, obtain to
Roast blank.
(5) will blank be roasted under the conditions of nitrogen protection atmosphere, with 4 DEG C/min heating rate, be warming up to 550 DEG C, protect
Temperature 2 days；It then proceedes to be warming up to 920 DEG C, and keeps the temperature roasting 8 days, obtain green compact.
(6) green compact that step 5 is roasting are heated to 2350 DEG C in high-temperature electric resistance furnace, keep the temperature 48h, graphite is prepared
Electrode.
Test 1
The graphite electrode product that above-described embodiment and comparative example are processed into is tested, national standard method survey is respectively adopted
Try resistivity, flexural strength, the compression strength of corresponding graphite electrode product.
1 graphite electrode physical property of table
Graphite electrode resistivity prepared by the present invention is substantially suitable compared to graphite electrode prepared by comparative example, flexural strength
Improve to a certain degree with compression strength, graphite electrode the problem of the falling that fracture can be improved to a certain extent.
Test 2
Graphite electrode cutting sampling product prepared by above-described embodiment and comparative example, weigh its weight, are denoted as A0, are placed on and add
In hot stove, with the heating rate of 5 DEG C/min to 800 DEG C, 30min is kept the temperature, is then shut off heating furnace, furnace cooling weighs heating
Treated, and example weight is denoted as A1, calculates weight-loss ratio.
Weight-loss ratio=(example weight A1 after sample initial weight A0- heated oxide) ÷ sample initial weight A0 × 100%
Test result is as follows:
2 graphite electrode weight rate of table
| Sample initial weight A0 | Example weight A1 after heated oxide | Weight-loss ratio | |
| Embodiment 1 | 50.01 | 46.98 | 6.1% |
| Embodiment 2 | 50.51 | 47.78 | 5.4% |
| Embodiment 3 | 50.58 | 48.06 | 5.0% |
| Embodiment 4 | 50.47 | 47.57 | 5.7% |
| Embodiment 5 | 50.69 | 48.26 | 4.8% |
| Comparative example 1 | 50.30 | 42.5 | 15.5% |
| Embodiment 6 | 50.10 | 47.65 | 4.9% |
| Comparative example 2 | 50.98 | 44.32 | 13.1% |
| Embodiment 7 | 50.22 | 47.75 | 4.9% |
Test result shows that graphite electrode anit-oxidizing performance prepared by the present invention has well compared to the case where comparative example
Improve, it is less in 800 DEG C of heat preservations, 30 minutes oxidation weight loss amounts, it is anticipated that can be more preferable when corresponding graphite electrode application
Holding stable structure.The dosage of the aluminum oxide of comparative example application is less or lacks the cooperation of calcium oxide, whole weightless
Rate control is poor, and still weightlessness easy to oxidize, the comprehensive stability applied to electric arc furnaces be not high.
Claims (8)
1. a kind of electric arc furnaces graphite electrode preparation method, which comprises the following steps:
(1) petroleum coke particles 50-60%, alchlor powder 3-6%, calcium oxide 2-4%, graphite powder particle are taken by weight percentage
10-20%, pitch 15-25%；
(2) first petroleum coke particles, alchlor powder, calcium oxide, graphite powder particle are imported in kneading pot, is warming up to simultaneously
120-125 DEG C, kneading 10-60min；
(3) pitch is heated to 150-180 DEG C of fusing, be added in the kneading pot of step 2, control kneading pot is warming up to 150-155
DEG C, then keep the temperature kneading 10-50min；
(4) after the completion of step 3 kneading, by material import molding die in, be forced into 10-30MPa, pressure maintaining 5-40min, obtain to
Roast blank；
(5) will blank be roasted under the conditions of nitrogen protection atmosphere, with 3-10 DEG C/min heating rate, be warming up to 500-550 DEG C,
Heat preservation 0.5-3 days；It then proceedes to be warming up to 880-920 DEG C, and keeps the temperature roasting 5-10 days, obtain green compact；
(6) green compact that step 5 is roasting are heated to 2300-2400 DEG C in high-temperature electric resistance furnace, keep the temperature 24-72h, are prepared
Graphite electrode.
2. electric arc furnaces graphite electrode preparation method as described in claim 1, which is characterized in that step 1, during raw material is taken,
The mixing total amount of alchlor and calcium oxide is 6-8%.
3. electric arc furnaces graphite electrode preparation method as claimed in claim 2, which is characterized in that step 1, take stone by weight percentage
Oil coke particle 55-60%, alchlor powder 4-6%, calcium oxide 2-3%, graphite powder particle 12-18%, pitch 15-23%.
4. electric arc furnaces graphite electrode preparation method as described in claim 1, which is characterized in that step 2, first by petroleum coke particles and
Graphite powder particle is added in kneading pot, and then alchlor powder and calcium oxide are added several times.
5. electric arc furnaces graphite electrode preparation method as claimed in claim 4, which is characterized in that alchlor is at least added in three times
And calcium oxide.
6. electric arc furnaces graphite electrode preparation method as described in claim 1, which is characterized in that step 3, pitch is heated to 150-
180 DEG C, 5-20 minutes are kept the temperature, is then added in the kneading pot of step 2.
7. electric arc furnaces graphite electrode preparation method as described in claim 1, which is characterized in that step 4, pressurize 20-30MPa, protects
Press 10-30min.
8. electric arc furnaces graphite electrode preparation method as described in claim 1, which is characterized in that step 5, first with 3-8 DEG C/min liter
Warm speed is warming up to 500-550 DEG C, keeps the temperature 1-2 days.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110627518A (en) * | 2019-10-29 | 2019-12-31 | 大同通扬碳素有限公司 | Preparation method of high-strength composite graphite electrode |
| CN110668837A (en) * | 2019-10-29 | 2020-01-10 | 大同通扬碳素有限公司 | Preparation method of low-loss graphite electrode |
-
2018
- 2018-09-07 CN CN201811046037.2A patent/CN109231987A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110627518A (en) * | 2019-10-29 | 2019-12-31 | 大同通扬碳素有限公司 | Preparation method of high-strength composite graphite electrode |
| CN110668837A (en) * | 2019-10-29 | 2020-01-10 | 大同通扬碳素有限公司 | Preparation method of low-loss graphite electrode |
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