CN108950229B - A kind of low power consumption is without sludge slugging furnace operating procedure - Google Patents
A kind of low power consumption is without sludge slugging furnace operating procedure Download PDFInfo
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- CN108950229B CN108950229B CN201810636903.7A CN201810636903A CN108950229B CN 108950229 B CN108950229 B CN 108950229B CN 201810636903 A CN201810636903 A CN 201810636903A CN 108950229 B CN108950229 B CN 108950229B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
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Abstract
The invention discloses a kind of low power consumptions without sludge slugging furnace operating procedure, and the technique is the following steps are included: preparation before (1) slugging；(2) separate operations orderly feed: the addition including starting the arc operation and three bucket slag charges；(3) lime is added: three ranks, and lime is added portionwise according to the rhythm of " slow-fast-slow "；(4) bull ladle condition confirms: including foam volume in slag temperature, packet base thickness degree, packet.The quick starting the arc method of slugging furnace of the present invention, improves production efficiency；The addition sequence and lime Adding Way of three bucket slag charges, reduce power consumption, reduce sludge phenomenon；The confirmation of bull ladle condition, avoids the destruction because of thick packet bottom to bits ingredient, and quality of production accident caused by reducing because of bits composition tolerances reduces loss, remarkable benefit.Using present invention process, sludge, thick packet bottom incidence are greatly reduced, and slugging furnace power consumption averagely declines 5.2-6.3kWh/t steel, and ESR ingot flaw detection qualification rate reaches 98.23-98.28%.
Description
Technical field
The invention belongs to metallurgical technology fields, and in particular to a kind of low power consumption is without sludge slugging furnace operating procedure.
Background technique
The effect of slugging furnace is that solid-state (powdery or bulk) slag charge is fused into liquid by graphite electrode heating, realizes electricity
The starting of slag hearth melt cinder.Slagging operation is improper to will cause the exceptions such as starting the arc speed is slow, foam volume is big, thick packet bottom.The slow shadow of starting the arc speed
The slugging efficiency of furnace is rung, power consumption is high.Foam volume causes greatly sludge, first is that being forced to reduce charging rate, efficiency low power consumption is high；Second is that slag
Middle gas content height influences ESR ingot Quality of Tail.Thickness packet bottom destroys the homogeneity of ingredients of slag charge, unfavorable to the quality of production.
Based on above-mentioned problem, orderly feed from the preparation before slugging, separate operations, skill, bull ladle is added in lime
Condition confirmation etc. improves, and develops a kind of low power consumption without sludge slugging furnace operating procedure, to reduce slugging furnace power consumption, subtract
Few sludge and thick packet bottom are of great significance.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of low power consumptions without sludge slugging furnace operating procedure, the technique side
Method includes preparation before slugging, separate operations orderly feed, skill is added in lime, the confirmation of bull ladle condition, and reaching reduces slugging furnace
Power consumption reduces sludge and thick packet bottom phenomenon.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of low power consumption is operated without sludge slugging furnace
Technique, the technique the following steps are included:
(1) preparation before slugging: graphite electrode size and water, electricity and gas energy medium inspection, under graphite electrode length must meet
Packet bottom can be contacted by falling, and trolley can be outputed by lifting, and the energy mediums such as water, electricity, gas are normal；
(2) separate operations orderly feed: the addition including starting the arc operation and three bucket slag charges；
Starting the arc operation: the Conductive Slag of 1.3-1.5kg/t slag charge, whereabouts graphite electrode are placed at packet bottom center, crawl falls
Contact graphite electrode with Conductive Slag, it is ensured that arc light is continuous, and with the fusing of Conductive Slag, remelting slag is added around Conductive Slag,
Form molten bath, starting the arc success；
The addition of three bucket slag charges: the powdery remelting slag of 355-379kg/t slag charge is added in the first bucket slag charge；Second bucket slag charge adds
Enter the blocky lime of 200-201kg/t slag charge；The powdery remelting slag of third bucket slag charge addition 420-445kg/t slag charge；
(3) lime is added: lime is added portionwise, single blanking≤50kg/t slag charge adds lower batch of material, lime after melting down
Addition divide three phases, be added according to the rhythm of " slow-fast-slow ", i.e., before 20min be added by 2.0-2.5kg/min, centre
Period is added by 5.0-6.0kg/min, and rear 20min is added by 2.0-2.5kg/min；
(4) bull ladle condition confirms: including foam volume in slag temperature, packet base thickness degree, packet.
Graphite electrode diameter > 150mm in the step (1) of the present invention.
Whereabouts graphite electrode is away from Conductive Slag 20-30mm in step (2) of the present invention.
Alumina must not be added in first bucket slag charge in step (2) of the present invention.
The powder and small powder that third bucket slag charge is added in step (2) of the present invention are magnesia, alumina, wherein 6.0- is added
The alumina of the magnesia of 7.5kg/t slag charge, 30.0-38.0kg/t slag charge.
Lime adds reaction 10-20min in step (3) of the present invention, and period 60-90min is added in lime.
Bull ladle slag temperature control system is at 1600-1650 DEG C in step (4) of the present invention.
With spy packet bottom in rod iron insertion packet before bull ladle in step (4) of the present invention, it is ensured that slag chargeization without packet bottom, infuses slag only
Packet base thickness degree is less than 50mm afterwards.
Non-foam is emerged in 100mm around graphite electrode in step (4) of the present invention.
Technique slugging power consumption of the present invention averagely reduces 5.2-6.3kWh/t steel, and ESR ingot flaw detection qualification rate reaches
98.23-98.28%
Product of the present invention detection method canonical reference ZBJ04001；ESR ingot non-destructive testing standard refers to JB/T2003-2007.
The beneficial effects of adopting the technical scheme are that 1, the quick starting the arc method of slugging furnace of the present invention, is improved
Production efficiency.2, the addition sequence and lime Adding Way of three bucket slag charge of the present invention reduce silt while reducing power consumption
Slag phenomenon is avoided because foam i.e. gas content height impacts ESR ingot Quality of Tail in slag.3, bull ladle condition of the present invention is true
Recognize, avoid the destruction because of thick packet bottom to bits ingredient, quality of production accident caused by reducing because of bits composition tolerances is reduced
Loss, reduces production cost, remarkable benefit.4, using present invention process, sludge, thick packet bottom incidence are greatly reduced, change
Slag hearth power consumption averagely reduces 5.2-6.3kWh/t steel, and ESR ingot flaw detection qualification rate reaches 98.23-98.28%.
Specific embodiment
Invention is further described in detail combined with specific embodiments below.
Embodiment 1
1320kg slag charge is melted without sludge slugging furnace operating procedure using low power consumption in certain iron company, and processing step includes changing
Preparation, separate operations before slag orderly feed, lime is added, the confirmation of bull ladle condition, specific as follows:
(1) preparation before slugging
Graphite electrode most thin place diameter 165mm is measured, electrode is increased to upper limit, and cinder ladle can be outputed smoothly, under electrode
Lower limit is dropped down onto, packet bottom can be contacted；The energy mediums such as water, electricity, gas are normal；
(2) separate operations orderly feed
Starting the arc operation: the Conductive Slag of 1.36kg/t slag charge is placed at packet bottom center, whereabouts graphite electrode is away from Conductive Slag 25mm
When, crawl whereabouts contacts graphite electrode with Conductive Slag, it is ensured that arc light is continuous, with the fusing of Conductive Slag, around Conductive Slag
Remelting slag is added, forms molten bath, starting the arc success；
The addition of three bucket slag charges: the powdery remelting slag of 379kg/t slag charge is added in the first bucket slag charge；Second bucket slag charge is added
The blocky lime of 201kg/t slag charge；The powder and small powder of 420kg/t slag charge is added in third bucket slag charge, wherein 6.2kg/t slag is added
The alumina of the magnesia of material, 31kg/t slag charge；
(3) lime is added
Preceding 20min is added by 2.1kg/min, and intermediate 15min is added by 5.2kg/min, and rear 20min is added by 2.3kg/min
Enter；After lime adds, period 70min, no sludge is added in reaction time 15min, lime；
(4) bull ladle condition confirms
1632 DEG C of thermometric (thermocouple) before bull ladle；
With packet bottom is visited in rod iron insertion packet before bull ladle, packet base thickness degree 10mm after slag is infused；
Non-foam is emerged in 100mm around graphite electrode.
After the present embodiment technique, slugging furnace operation level is substantially improved, and slugging power consumption averagely reduces 5.8kWh/ tons
Steel, sludge, thick packet bottom phenomenon are reduced, and ESR ingot flaw detection qualification rate reaches 98.24%；It is annual to be calculated by 3500 tons of ESR ingot of production,
It creates and makes benefit :=3500 tons × 5.8kWh/ tons × 0.59 yuan/kWh+3500 tons × 0.76% × 7500 yuan/ton=21.15 ten thousand yuan.
Embodiment 2
1500kg slag charge is melted without sludge slugging furnace operating procedure using low power consumption in certain iron company, and processing step includes changing
Preparation, separate operations before slag orderly feed, lime is added, the confirmation of bull ladle condition, specific as follows:
(1) preparation before slugging
Graphite electrode most thin place diameter 180mm is measured, electrode is increased to upper limit, and cinder ladle can be outputed smoothly, under electrode
Lower limit is dropped down onto, packet bottom can be contacted；The energy mediums such as water, electricity, gas are normal；
(2) separate operations orderly feed
Starting the arc operation: the Conductive Slag of 1.4kg/t slag charge is placed at packet bottom center, whereabouts graphite electrode is away from Conductive Slag 20mm
When, crawl whereabouts contacts graphite electrode with Conductive Slag, it is ensured that arc light is continuous, with the fusing of Conductive Slag, around Conductive Slag
Remelting slag is added, forms molten bath, starting the arc success；
The addition of three bucket slag charges: the powdery remelting slag of 367kg/t slag charge is added in the first bucket slag charge；Second bucket slag charge is added
The blocky lime of 200kg/t slag charge；The powder and small powder of 433kg/t slag charge is added in third bucket slag charge, wherein 6.3kg/t slag is added
The alumina of the magnesia of material, 33kg/t slag charge；
(3) lime is added
Preceding 20min is added by 2.3kg/min, and intermediate 20min is added by 5.8kg/min, and rear 20min is added by 2.4kg/min
Enter；After lime adds, period 80min, no sludge is added in reaction time 20min, lime；
(4) bull ladle condition confirms
1612 DEG C of thermometric (thermocouple) before bull ladle；
With packet bottom is visited in rod iron insertion packet before bull ladle, packet base thickness degree 25mm after slag is infused；
Non-foam is emerged in 100mm around graphite electrode.
After the present embodiment technique, slugging furnace operation level is substantially improved, and slugging power consumption averagely reduces 5.2kWh/ tons
Steel, sludge, thick packet bottom phenomenon are reduced, and ESR ingot flaw detection qualification rate reaches 98.23%；It is annual to be calculated by 3100 tons of ESR ingot of production,
It creates and makes benefit :=3100 tons × 5.2kWh/ tons × 0.59 yuan/kWh+3100 tons × 0.73% × 7500 yuan/ton=17.92 ten thousand yuan.
Embodiment 3
1650kg slag charge is melted without sludge slugging furnace operating procedure using low power consumption in certain iron company, and processing step includes changing
Preparation, separate operations before slag orderly feed, lime is added, the confirmation of bull ladle condition, specific as follows:
(1) preparation before slugging
Graphite electrode most thin place diameter 160mm is measured, electrode is increased to upper limit, and cinder ladle can be outputed smoothly, under electrode
Lower limit is dropped down onto, packet bottom can be contacted；The energy mediums such as water, electricity, gas are normal；
(2) separate operations orderly feed
Starting the arc operation: the Conductive Slag of 1.45kg/t slag charge is placed at packet bottom center, whereabouts graphite electrode is away from Conductive Slag 30mm
When, crawl whereabouts contacts graphite electrode with Conductive Slag, it is ensured that arc light is continuous, with the fusing of Conductive Slag, around Conductive Slag
Remelting slag is added, forms molten bath, starting the arc success；
The addition of three bucket slag charges: the powdery remelting slag of 364kg/t slag charge is added in the first bucket slag charge；Second bucket slag charge is added
The blocky lime of 200kg/t slag charge；The powder and small powder of 436kg/t slag charge is added in third bucket slag charge, wherein 7.5kg/t slag is added
The alumina of the magnesia of material, 38kg/t slag charge；
(3) lime is added
Preceding 20min is added by 2.3kg/min, and intermediate 30min is added by 5.6kg/min, and rear 20min is added by 2.1kg/min
Enter；After lime adds, period 90min, no sludge is added in reaction time 20min, lime；
(4) bull ladle condition confirms
1648 DEG C of thermometric (thermocouple) before bull ladle；
With packet bottom is visited in rod iron insertion packet before bull ladle, packet base thickness degree 5mm after slag is infused；
Non-foam is emerged in 100mm around graphite electrode.
After the present embodiment technique, slugging furnace operation level is substantially improved, and slugging power consumption averagely reduces 6.3kWh/ tons
Steel, sludge, thick packet bottom phenomenon are reduced, and ESR ingot flaw detection qualification rate reaches 98.28%；It is annual to be calculated by 4200 tons of ESR ingot of production,
It creates and makes benefit :=4200 tons × 6.3kWh/ tons × 0.59 yuan/kWh+4200 tons × 0.81% × 7500 yuan/ton=27.08 ten thousand yuan.
Embodiment 4
1450kg slag charge is melted without sludge slugging furnace operating procedure using low power consumption in certain iron company, and processing step includes changing
Preparation, separate operations before slag orderly feed, lime is added, the confirmation of bull ladle condition, specific as follows:
(1) preparation before slugging
Graphite electrode most thin place diameter 155mm is measured, electrode is increased to upper limit, and cinder ladle can be outputed smoothly, under electrode
Lower limit is dropped down onto, packet bottom can be contacted；The energy mediums such as water, electricity, gas are normal；
(2) separate operations orderly feed
Starting the arc operation: the Conductive Slag of 1.30kg/t slag charge is placed at packet bottom center, whereabouts graphite electrode is away from Conductive Slag 20mm
When, crawl whereabouts contacts graphite electrode with Conductive Slag, it is ensured that arc light is continuous, with the fusing of Conductive Slag, around Conductive Slag
Remelting slag is added, forms molten bath, starting the arc success；
The addition of three bucket slag charges: the powdery remelting slag of 359kg/t slag charge is added in the first bucket slag charge；Second bucket slag charge is added
The blocky lime of 200kg/t slag charge；The powder and small powder of 441kg/t slag charge is added in third bucket slag charge, wherein 6.5kg/t slag is added
The alumina of the magnesia of material, 35kg/t slag charge；
(3) lime is added
Preceding 20min is added by 2.0kg/min, and intermediate 10min is added by 6.0kg/min, and rear 20min is added by 2.5kg/min
Enter；After lime adds, period 60min, no sludge is added in reaction time 10min, lime；
(4) bull ladle condition confirms
1600 DEG C of thermometric (thermocouple) before bull ladle；
With packet bottom is visited in rod iron insertion packet before bull ladle, packet base thickness degree 15mm after slag is infused；
Non-foam is emerged in 100mm around graphite electrode.
After the present embodiment technique, slugging furnace operation level is substantially improved, and slugging power consumption averagely reduces 6.0kWh/ tons
Steel, sludge, thick packet bottom phenomenon are reduced, and ESR ingot flaw detection qualification rate reaches 98.27%；It is annual to be calculated by 4000 tons of ESR ingot of production,
It creates and makes benefit :=4000 tons × 6.0kWh/ tons × 0.59 yuan/kWh+4000 tons × 0.80% × 7500 yuan/ton=25.42 ten thousand yuan.
Embodiment 5
1550kg slag charge is melted without sludge slugging furnace operating procedure using low power consumption in certain iron company, and processing step includes changing
Preparation, separate operations before slag orderly feed, lime is added, the confirmation of bull ladle condition, specific as follows:
(1) preparation before slugging
Graphite electrode most thin place diameter 170mm is measured, electrode is increased to upper limit, and cinder ladle can be outputed smoothly, under electrode
Lower limit is dropped down onto, packet bottom can be contacted；The energy mediums such as water, electricity, gas are normal；
(2) separate operations orderly feed
Starting the arc operation: the Conductive Slag of 1.50kg/t slag charge is placed at packet bottom center, whereabouts graphite electrode is away from Conductive Slag 30mm
When, crawl whereabouts contacts graphite electrode with Conductive Slag, it is ensured that arc light is continuous, with the fusing of Conductive Slag, around Conductive Slag
Remelting slag is added, forms molten bath, starting the arc success；
The addition of three bucket slag charges: the powdery remelting slag of 355kg/t slag charge is added in the first bucket slag charge；Second bucket slag charge is added
The blocky lime of 200kg/t slag charge；The powder and small powder of 445kg/t slag charge is added in third bucket slag charge, wherein 6.0kg/t slag is added
The alumina of the magnesia of material, 30kg/t slag charge；
(3) lime is added
Preceding 20min is added by 2.5kg/min, and intermediate 20min is added by 5.0kg/min, and rear 20min is added by 2.0kg/min
Enter；After lime adds, period 80min, no sludge is added in reaction time 20min, lime；
(4) bull ladle condition confirms
1650 DEG C of thermometric (thermocouple) before bull ladle；
With packet bottom is visited in rod iron insertion packet before bull ladle, packet base thickness degree 30mm after slag is infused；
Non-foam is emerged in 100mm around graphite electrode.
After the present embodiment technique, slugging furnace operation level is substantially improved, and slugging power consumption averagely reduces 5.9kWh/ tons
Steel, sludge, thick packet bottom phenomenon are reduced, and ESR ingot flaw detection qualification rate reaches 98.25%；It is annual to be calculated by 3800 tons of ESR ingot of production,
It creates and makes benefit :=3800 tons × 5.9kWh/ tons × 0.59 yuan/kWh+3800 tons × 0.78% × 7500 yuan/ton=23.55 ten thousand yuan.
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although referring to above-described embodiment to this hair
It is bright to be described in detail, those skilled in the art should understand that: still the present invention can be modified or be waited
With replacement, without departing from the spirit or scope of the invention, or any substitutions, should all cover in power of the invention
In sharp claimed range.
Claims (9)
1. a kind of low power consumption is without sludge slugging furnace operating procedure, which is characterized in that the technique the following steps are included:
(1) preparation before slugging: graphite electrode size and water, electricity and gas energy medium inspection, graphite electrode length must meet whereabouts energy
Contact packet bottom, trolley can be outputed by lifting, and water, electricity, gas energy medium is normal；
(2) separate operations orderly feed: the addition including starting the arc operation and three bucket slag charges；
Starting the arc operation: the Conductive Slag of 1.3-1.5kg/t slag charge, whereabouts graphite electrode are placed at packet bottom center, crawl whereabouts makes stone
Electrode ink is contacted with Conductive Slag, it is ensured that arc light is continuous, and with the fusing of Conductive Slag, remelting slag is added around Conductive Slag, is formed
Molten bath, starting the arc success；
The addition of three bucket slag charges: the powdery remelting slag of 355-379kg/t slag charge is added in the first bucket slag charge；Second bucket slag charge is added
The blocky lime of 200-201kg/t slag charge；The powder and small powder of third bucket slag charge addition 420-445kg/t slag charge；
(3) lime is added: lime is added portionwise, single blanking≤50kg/t slag charge adds lower batch of material after melting down, lime
Addition divides three phases, is added according to the rhythm of " slow-fast-slow ", i.e., preceding 20min is added by 2.0-2.5kg/min, when intermediate
Between section by 5.0-6.0kg/min be added, rear 20min by 2.0-2.5kg/min addition；
(4) bull ladle condition confirms: including foam volume in slag temperature, packet base thickness degree, packet.
2. a kind of low power consumption according to claim 1 is without sludge slugging furnace operating procedure, which is characterized in that the step
(1) graphite electrode diameter > 150mm in.
3. a kind of low power consumption according to claim 1 is without sludge slugging furnace operating procedure, which is characterized in that the step
(2) whereabouts graphite electrode is away from Conductive Slag 20-30mm in.
4. a kind of low power consumption according to claim 1 is without sludge slugging furnace operating procedure, which is characterized in that the step
(2) alumina must not be added in the first bucket slag charge in.
5. a kind of low power consumption according to any one of claims 1-4 is without sludge slugging furnace operating procedure, which is characterized in that
Lime adds reaction 10-20min in the step (3), and period 60-90min is added in lime.
6. a kind of low power consumption according to any one of claims 1-4 is without sludge slugging furnace operating procedure, which is characterized in that
Bull ladle slag temperature control system is at 1600-1650 DEG C in the step (4).
7. a kind of low power consumption according to any one of claims 1-4 is without sludge slugging furnace operating procedure, which is characterized in that
With spy packet bottom in rod iron insertion packet before bull ladle in the step (4), it is ensured that slag chargeization is only without packet bottom, and packet base thickness degree is less than after infusing slag
50mm。
8. a kind of low power consumption according to any one of claims 1-4 is without sludge slugging furnace operating procedure, which is characterized in that
Non-foam is emerged in 100mm around graphite electrode in the step (4).
9. a kind of low power consumption according to any one of claims 1-4 is without sludge slugging furnace operating procedure, which is characterized in that
The technique slugging power consumption averagely reduces 5.2-6.3kWh/t steel, and ESR ingot flaw detection qualification rate reaches 98.23-98.28%.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1840716A (en) * | 2005-03-28 | 2006-10-04 | 宝钢集团上海梅山有限公司 | Arcing and smelting technology for liquid slag in electroslag furnace |
| CN104561569A (en) * | 2015-01-14 | 2015-04-29 | 中原特钢股份有限公司 | Preparation and use process for electroslag remelting slag |
| EP3260520A1 (en) * | 2016-06-23 | 2017-12-27 | Axens | Improved method for deep hydroconversion by extracting aromatics and resins with recovery of the hydroconversion extract and the raffinate in the downstream units |
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2018
- 2018-06-20 CN CN201810636903.7A patent/CN108950229B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1840716A (en) * | 2005-03-28 | 2006-10-04 | 宝钢集团上海梅山有限公司 | Arcing and smelting technology for liquid slag in electroslag furnace |
| CN104561569A (en) * | 2015-01-14 | 2015-04-29 | 中原特钢股份有限公司 | Preparation and use process for electroslag remelting slag |
| EP3260520A1 (en) * | 2016-06-23 | 2017-12-27 | Axens | Improved method for deep hydroconversion by extracting aromatics and resins with recovery of the hydroconversion extract and the raffinate in the downstream units |
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