CN104087713B - A kind of complete processing of low nitrogen low hydrogen carburelant - Google Patents
A kind of complete processing of low nitrogen low hydrogen carburelant Download PDFInfo
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- CN104087713B CN104087713B CN201410292654.6A CN201410292654A CN104087713B CN 104087713 B CN104087713 B CN 104087713B CN 201410292654 A CN201410292654 A CN 201410292654A CN 104087713 B CN104087713 B CN 104087713B
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Abstract
The present invention relates to a kind of carburelant, particularly relate to a kind of complete processing of low nitrogen low hydrogen carburelant, be intended to solve existing carburelant nitrogen and hydrogen richness high, thus affect the problem of steel quality produced, comprise following processing step: the refinery coke of 17% ~ 23%, the purification of graphite of 32% ~ 38%, schungite, the free carbon of 12% ~ 16%, the pitch of 0.5% ~ 1.5% of 27% ~ 33% are mixed, granulation, surface modification, thermal treatment, screening, class wrapping.The present invention is under the condition meeting carburelant composition and performance, and cost is lower; Denitrogenation Dehydroepiandrosterone derivative is carried out to carburelant, to effectively reduce by carburelant introduce the harm that impurity causes steel performance, considerably increase the specific absorption of molten steel to carbon; According to granularity, carburelant is classified, both avoided and easily flown upward, burn and cause very serious environmental issue, turn avoid the low and problem of instability of the rate of recovery.
Description
Technical field
The present invention relates to a kind of carburelant, particularly relate to a kind of complete processing of low nitrogen low hydrogen carburelant.
Background technology
Refinery coke is as carburelant conventional at present, although cost is low, its proportion is little, can not penetrate, there is the defect of carburetting poor effect after dropping into ladle; In addition, while current carburelant introduces carbon again, introduce the elements such as sulphur, phosphorus, nitrogen, hydrogen comparatively large to steel water mitigation, sulphur and phosphorus can be removed by reaction of blowing, and nitrogen and protium are difficult to removing once enter molten steel; Nitrogen contained in carburelant and hydrogen not only can reduce the mechanical property of steel, are also the major reasons forming shrinkage cavity, white-spot defects and strand crackle, bring very large difficulty to the high-quality steel of preparation.
Summary of the invention
The invention provides a kind of low nitrogen low hydrogen carburelant, be intended to solve existing carburelant nitrogen and hydrogen richness high, thus affect the problem of the steel quality produced.
In order to solve above technical problem, the present invention is achieved through the following technical solutions:
A complete processing for low nitrogen low hydrogen carburelant, comprises following processing step:
A, according to mass percent, the refinery coke of 17% ~ 23%, the purification of graphite of 32% ~ 38%, schungite, the free carbon of 12% ~ 16%, the pitch of 0.5% ~ 1.5% of 27% ~ 33% to be mixed;
B, granulation: the compound through steps A is carried out rotary table granulation;
C, surface modification: in cylinder, rotate 3 ~ 4 hours by causing the carburelant of grain in step B; The surface modification of carburelant can increase carburelant and penetrate and invade profit ability in molten steel;
D, thermal treatment: the carburelant through step C surface modification is placed 1 ~ 2 hour at 80 ~ 120 DEG C and under the condition of pressure at-0.05 ~-0.1MPa in temperature; Be conducive to removing the nitrogen in carburelant and hydrogen; Reduce the content of nitrogen and hydrogen in carburelant, the carburelant adopting this step process to cross adds in molten steel, adds the quality of steel.
E, screening: the carburelant after step D process is sieved on demand on the vibrating; Carburelant is sieved according to granularity, is conducive to selecting varigrained carburelant, to reach better effect according to different needs;
F, according to granularity, class wrapping is carried out to the carburelant sieved.
Further, refinery coke, the purification of graphite of 35%, schungite, the free carbon of 14%, the pitch of 1% of 30% of 20% is comprised in step according to mass percent; Cost and performance are all relatively good.
Further, refinery coke, the purification of graphite of 32%, schungite, the free carbon of 13%, the pitch of 1% of 31% of 23% is comprised in step according to mass percent; Most economical mass ratio.
Further, refinery coke, the purification of graphite of 36%, schungite, the free carbon of 14%, the pitch of 1% of 31% of 18% is comprised in step according to mass percent; The mass ratio of performance the best.
Further, the granularity of described pitch is below 600 orders; Be conducive to strengthening the bond effect of pitch, and put the excessive of only particle.
Further, in step C, carburelant rotates 3.5 hours in cylinder; Granulation outcome is best.
Further, carburelant is placed 1.5 hours temperature 100 DEG C and under the condition of pressure-0.075MPa in step D; The effect removing nitrogen and hydrogen is best.
Compared with prior art advantage of the present invention is: the present invention selects refinery coke, purification of graphite, schungite, free carbon, pitch compound to prepare carburelant, under the condition meeting carburelant composition and performance, product cost is reduced further; Under condition of negative pressure, denitrogenation Dehydroepiandrosterone derivative is carried out to carburelant, to effectively reduce by carburelant introduce the harm that impurity causes steel performance, considerably increase the specific absorption of molten steel to carbon; According to granularity, carburelant is classified, match with working conditions, both avoided carburelant because of particle too little, easily contact with air at high operating temperatures and oxidation loss occurs, easily fly upward, burn and cause very serious environmental issue, turn avoid carburelant granularity to be absorbed by molten steel too greatly, cause the rate of recovery low and the problem of instability.
Embodiment
A complete processing for low nitrogen low hydrogen carburelant, comprises following processing step:
A, according to mass percent, by the refinery coke of 20%, 35% purification of graphite, the schungite of 30%, free carbon, the pitch of 1% granularity below 600 orders of 14% mix;
B, granulation: the compound through steps A is carried out rotary table granulation;
C, surface modification: in cylinder, rotate 3.5 hours by causing the carburelant of grain in step B;
D, thermal treatment: the carburelant through step C surface modification is placed 1.5 hours at 100 DEG C and under the condition of pressure at-0.075MPa in temperature;
E, screening: the carburelant after step D process is sieved on demand on the vibrating;
F, according to granularity, class wrapping is carried out to the carburelant sieved.
By screening, carburelant is sieved at 0 ~ 1mm, 1 ~ 4mm, 4 ~ 10mm according to size range; Schungite is semi-graphited carbon.
The present invention selects refinery coke, purification of graphite, schungite, free carbon, pitch compound to prepare carburelant, under the condition meeting carburelant composition and performance, product cost is reduced further; Under condition of negative pressure, denitrogenation Dehydroepiandrosterone derivative is carried out to carburelant, to effectively reduce by carburelant introduce the harm that impurity causes steel performance, considerably increase the specific absorption of molten steel to carbon; According to granularity, carburelant is classified, match with working conditions, both avoided carburelant because of particle too little, easily contact with air at high operating temperatures and oxidation loss occurs, easily fly upward, burn and cause very serious environmental issue, turn avoid carburelant granularity to be absorbed by molten steel too greatly, cause the rate of recovery low and the problem of instability.
The foregoing is only specific embodiments of the invention, but technical characteristic of the present invention is not limited thereto, any those skilled in the art is in the field of the invention, and the change done or modification are all encompassed among the scope of the claims of the present invention.
Claims (7)
1. a complete processing for low nitrogen low hydrogen carburelant, is characterized in that: comprise following processing step:
A, according to mass percent, the refinery coke of 17% ~ 23%, the purification of graphite of 32% ~ 38%, schungite, the free carbon of 12% ~ 16%, the pitch of 0.5% ~ 1.5% of 27% ~ 33% to be mixed;
B, granulation: the compound through steps A is carried out rotary table granulation;
C, surface modification: in cylinder, rotate 3 ~ 4 hours by causing the carburelant of grain in step B;
D, thermal treatment: the carburelant through step C surface modification is placed 1 ~ 2 hour at 80 ~ 120 DEG C and under the condition of pressure at-0.05 ~-0.1MPa in temperature;
E, screening: the carburelant after step D process is sieved on demand on the vibrating;
F, according to granularity, class wrapping is carried out to the carburelant sieved.
2. one according to claim 1 low nitrogen low hydrogen carburelant complete processing, is characterized in that: comprise refinery coke, the purification of graphite of 35%, schungite, the free carbon of 14%, the pitch of 1% of 30% of 20% in step according to mass percent.
3. one according to claim 1 low nitrogen low hydrogen carburelant complete processing, is characterized in that: comprise refinery coke, the purification of graphite of 32%, schungite, the free carbon of 13%, the pitch of 1% of 31% of 23% in step according to mass percent.
4. one according to claim 1 low nitrogen low hydrogen carburelant complete processing, is characterized in that: comprise refinery coke, the purification of graphite of 36%, schungite, the free carbon of 14%, the pitch of 1% of 31% of 18% in step according to mass percent.
5. one according to claim 1 low nitrogen low hydrogen carburelant complete processing, is characterized in that: the granularity of described pitch is below 600 orders.
6. one according to claim 1 low nitrogen low hydrogen carburelant complete processing, is characterized in that: in step C, carburelant rotates 3.5 hours in cylinder.
7. one according to claim 1 low nitrogen low hydrogen carburelant complete processing, is characterized in that: carburelant is placed 1.5 hours temperature 100 DEG C and under the condition of pressure-0.075MPa in step D.
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| CN106222360A (en) * | 2016-08-24 | 2016-12-14 | 钱华 | A kind of refining furnace steel-making low nitrogen hypoxia carburetting ball and preparation method thereof |
| CN107326145A (en) * | 2017-07-05 | 2017-11-07 | 天长市兴宇铸造有限公司 | A kind of alloy Investment Steel Castings casting carburant and its preparation technology |
| CN109652612A (en) * | 2019-01-16 | 2019-04-19 | 连云港博威冶金材料有限公司 | A kind of carburant and preparation method thereof |
| CN110804686B (en) * | 2019-11-28 | 2021-09-17 | 丹晟实业（上海）有限公司 | Processing technology of low-nitrogen carburant |
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| CN1018736B (en) * | 1988-03-18 | 1992-10-21 | 中南工业大学 | Production of high-voltage high specific capacitance tantalum powder by means of carbon reduction |
| CN1212408C (en) * | 2003-09-04 | 2005-07-27 | 吴光亮 | Carburant for steel-making and producing process and method of using thereof |
| CN100383255C (en) * | 2005-10-18 | 2008-04-23 | 赵聚法 | Petrol coke graphitization prepared carburant and petrol coke graphitization furnace filling technology |
| CN102703637B (en) * | 2012-06-13 | 2014-09-24 | 南阳铭鑫斯迪奥科技有限公司 | Low-nitrogen recarbonizer |
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Address after: 313100 new industrial park, pheasant City, Huzhou, Zhejiang, Changxing County Patentee after: Zhejiang Jincheng new material Limited by Share Ltd Address before: 313100, Huzhou, Changxing County, Zhejiang province pheasant Town Industrial Zone Zhejiang Jincheng refractory materials Co., Ltd. Patentee before: Zhejiang Jincheng Refractories Co., Ltd. |