CN107012283A - Converter slag retention method - Google Patents
Converter slag retention method Download PDFInfo
- Publication number
- CN107012283A CN107012283A CN201610059280.2A CN201610059280A CN107012283A CN 107012283 A CN107012283 A CN 107012283A CN 201610059280 A CN201610059280 A CN 201610059280A CN 107012283 A CN107012283 A CN 107012283A
- Authority
- CN
- China
- Prior art keywords
- slag
- converter
- splashing
- shaken
- terminates
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002893 slag Substances 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000014759 maintenance of location Effects 0.000 title 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 30
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 229910052742 iron Inorganic materials 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000001301 oxygen Substances 0.000 claims abstract description 14
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 14
- 238000003723 Smelting Methods 0.000 claims abstract description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 238000007664 blowing Methods 0.000 claims abstract description 9
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 8
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 8
- 229910000514 dolomite Inorganic materials 0.000 claims abstract description 8
- 239000010459 dolomite Substances 0.000 claims abstract description 8
- 239000004571 lime Substances 0.000 claims abstract description 8
- 238000007792 addition Methods 0.000 claims description 7
- 238000010079 rubber tapping Methods 0.000 claims description 6
- 230000003247 decreasing effect Effects 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 230000004907 flux Effects 0.000 abstract description 6
- 238000004880 explosion Methods 0.000 abstract description 5
- 238000013022 venting Methods 0.000 abstract description 4
- 239000007921 spray Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000033764 rhythmic process Effects 0.000 abstract description 2
- 238000012790 confirmation Methods 0.000 abstract 1
- 239000000428 dust Substances 0.000 description 8
- 238000009628 steelmaking Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/36—Processes yielding slags of special composition
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention provides a converter slag remaining method, which comprises the steps of controlling a slag pouring angle according to the smelting end point temperature and the oxygen value of a converter, shaking the converter to a zero position after slag pouring, splashing slag by adopting nitrogen, and adding a slag splashing agent during slag splashing; adding active lime and light-burned dolomite for thick slag before slag splashing is finished; after the slag splashing is finished, the converter is shaken to 90-98 degrees, the slag condition is confirmed, scrap steel is added after the confirmation to mix molten iron, and the oxygen flow adopts 25000-26500 Nm when the blowing is finished after the iron mixing3And the gun position is 2100-2250 mm. The invention can avoid the spray explosion phenomenon during iron mixing, eliminate potential safety hazard, avoid the dry dedusting explosion venting problem caused by non-ignition in the early stage of blowing, stabilize the production rhythm and ensure the equipment safety; meanwhile, the flux consumption can be greatly reduced, and the flux consumption is reduced every timeThe consumption of the active lime and the light burned dolomite is respectively reduced by 11.1kg/t steel and 8kg/t steel, thereby effectively reducing the smelting cost.
Description
Technical field
The invention belongs to process for making technical field, more particularly to a kind of that dry method venting of dust explosion is prevented under the conditions of dry method dust, reduction is molten
The remained converter slag method of agent unit consumption.
Background technology
Reduction converter smelting cost is always an important Con trolling index of steel mill, and wherein to account for steel-making cost more one large for flux component
Volume, therefore reduction steel-making flux cost is imperative.Under normal circumstances, the pneumatic steelmaking equipped with dry method dust all will after slag is splashed
Slag is outwelled, because staying the quantity of slag is improper can cause to strike sparks not smooth during blowing, is in turn resulted in dry method dust venting of dust explosion, can be damaged when serious
Bad dry dust removal equipment.
The content of the invention
The present invention is intended to provide one kind can prevent sparking not smooth phenomenon during blowing, it is to avoid produced during iron making and spray quick-fried, reduce flux consumption,
Reduce the remained converter slag method of smelting cost.
For up to this purpose, this invention takes following technical solution：
A kind of remained converter slag method, its specific method and step are：
(1) deslagging angle control is carried out according to upper stove smelting endpoint temperature and oxygen value, upper stove smelting endpoint tapping temperature T and gone out
The corresponding deslagging angle of steel oxygen value [O] is：
(2) after deslagging terminates, converter is shaken to zero-bit, and slag, 38000~42000Nm of nitrogen flow are splashed using nitrogen3/ h, splashes slag
Rifle position is gradually decreased to 500mm from 2000mm, is splashed when splashing slag shown in slag agent addition such as step (1), splash slag time control 2~
4min；
(3) splash slag and terminate the preceding active lime of 18~22s additions and each 980~1050kg progress dry slag of light dolomite；
(4) splash after slag terminates, converter is shaken to 90 °~98 °, slag condition is confirmed, it is ensured that slag splashes dry；
(5) steel scrap hot metal charging is added after clinker confirms, iron making time control is in 4~6min；
(6) oxygen flow uses 25000~26500Nm when iron making terminates to blow3/ h, 2100~2250mm of rifle position, start to blow
If refining 30s sparkings are not smooth, blunderbuss grate immediately, to shaking to -40 ° after stove during grate, shakes forward to 60 °, then will turned
Stove, which is shaken to zero-bit, to be continued to blow.
It is described to splash slag agent and mainly contain C and MgO, wherein containing C：9~11wt%, containing MgO：55~60wt%.The present invention's has
Beneficial effect is：
Using deslagging of the invention first, after splash the method for slag and dry slag, can avoid producing spray quick-fried phenomenon during iron making, eliminate safety
Hidden danger；By rationally controlling to stay the quantity of slag, it is to avoid Primary period because beat it is missing of ignition caused by dry method dust venting of dust explosion problem, stabilize
Rhythm of production, it is ensured that equipment safety；Meanwhile, the present invention can greatly reduce flux consumption, make the active lime of every heat and light
Calcined dolomite consumption reduces 11.1kg/t steel and 8kg/t steel respectively, so as to effectively reduce smelting cost.
Embodiment
Slag agent is splashed containing C：9~11wt%, containing MgO：55~60wt%.
Embodiment 1：
1st, upper T1710 DEG C of stove smelting endpoint tapping temperature, tap oxygen value [O] 840ppm, determines 116 ° of deslagging angle.
2nd, after deslagging terminates, converter is shaken to zero-bit, and slag, nitrogen flow 39500Nm are splashed using nitrogen3/ h, splash slag rifle position by height to
It is low, 500mm is gradually decreased to from 2000mm, slag agent addition is splashed when splashing slag for 2.75kg/t steel, slag time 4min is splashed.
3rd, splash 20s before slag terminates and add active lime and each 1000kg progress dry slag of light dolomite.
4th, splash after slag terminates, converter is shaken to 95 °, slag condition is confirmed, it is ensured that slag splashes dry.
5th, steel scrap hot metal charging is added after clinker confirms, rill is converted slowly during iron making, and time control is in 5min.
6th, oxygen flow uses 26000Nm when iron making terminates blowing3/ h, rifle position 2200mm.Start blowing 30s to occur striking sparks not
Freely, blunderbuss grate immediately, to shaking to -40 ° after stove during grate, shakes forward to 60 °, then shakes converter to zero-bit and continue to blow
Refining.
Embodiment 2：
1st, upper T1650 DEG C of stove smelting endpoint tapping temperature, tap oxygen value [O] 855ppm, and it is 106 ° to determine deslagging angle.
2nd, after deslagging terminates, converter is shaken to zero-bit, and slag, nitrogen flow 40000Nm are splashed using nitrogen3/ h, splash slag rifle position by height to
It is low, 500mm is gradually decreased to from 2000mm, slag agent addition is splashed when splashing slag for 1.65kg/t steel, slag time 2.5min is splashed.
3rd, splash 19s before slag terminates and add active lime 990kg, light dolomite 1020kg progress dry slags.
4th, splash after slag terminates, converter is shaken to 95 °, slag condition is confirmed, it is ensured that slag splashes dry.
5th, steel scrap hot metal charging is added after clinker confirms, rill is converted slowly during iron making, and time control is in 5.5min.
6th, oxygen flow uses 25500Nm when iron making terminates blowing3/ h, rifle position 2150mm.
Embodiment 3：
1st, upper T1690 DEG C of stove smelting endpoint tapping temperature, tap oxygen value [O] 840ppm, and it is 109 ° to determine deslagging angle.
2nd, after deslagging terminates, converter is shaken to zero-bit, and slag, nitrogen flow 41000Nm are splashed using nitrogen3/ h, splash slag rifle position by height to
It is low, 500mm is gradually decreased to from 2000mm, slag agent addition is splashed when splashing slag for 2.2kg/t steel, slag time 3min is splashed.
3rd, splash 21s before slag terminates and add active lime 1010kg, light dolomite 990kg progress dry slags.
4th, splash after slag terminates, converter is shaken to 95 °, slag condition is confirmed, it is ensured that slag splashes dry.
5th, steel scrap hot metal charging is added after clinker confirms, rill is converted slowly during iron making, and time control is in 4.5min.
6th, oxygen flow uses 26200Nm when iron making terminates blowing3/ h, rifle position 2210mm.
Claims (2)
1. a kind of remained converter slag method, it is characterised in that specific method and step are：
(1) deslagging angle control, upper stove smelting endpoint tapping are carried out according to upper stove smelting endpoint temperature and oxygen value
Temperature T and the corresponding deslagging angle of tapping oxygen value [O] are：
(2) after deslagging terminates, converter is shaken to zero-bit, and slag is splashed using nitrogen, and nitrogen flow 38000~
42000Nm3/ h, splashes slag rifle position and is gradually decreased to 500mm from 2000mm, and slag agent addition such as step is splashed when splashing slag
(1) shown in, slag time control is splashed in 2~4min；
(3) splash slag and terminate the preceding active lime of 18~22s additions and each 980~1050kg progress of light dolomite
Dry slag；
(4) splash after slag terminates, converter is shaken to 90 °~98 °, slag condition is confirmed, it is ensured that slag splashes dry；
(5) steel scrap hot metal charging is added after clinker confirms, iron making time control is in 4~6min；
(6) oxygen flow uses 25000~26500Nm when iron making terminates to blow3/ h, rifle position 2100~
2250mm, if it is not smooth to start blowing 30s sparkings, blunderbuss grate immediately, to shaking to -40 ° after stove during grate,
Shake forward to 60 °, then converter is shaken to zero-bit and continues to blow.
2. remained converter slag method according to claim 1, it is characterised in that described to splash slag agent and mainly contain
There are C and MgO, wherein containing C：9~11wt%, containing MgO：55~60wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610059280.2A CN107012283B (en) | 2016-01-27 | 2016-01-27 | Converter slag retention method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610059280.2A CN107012283B (en) | 2016-01-27 | 2016-01-27 | Converter slag retention method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107012283A true CN107012283A (en) | 2017-08-04 |
| CN107012283B CN107012283B (en) | 2018-10-09 |
Family
ID=59438624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610059280.2A Active CN107012283B (en) | 2016-01-27 | 2016-01-27 | Converter slag retention method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107012283B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110656215A (en) * | 2019-09-27 | 2020-01-07 | 山东钢铁股份有限公司 | Method for preventing unsuccessful blowing and igniting of converter |
| CN113201618A (en) * | 2021-03-19 | 2021-08-03 | 阳春新钢铁有限责任公司 | Production method for reducing down-converter times and reducing tapping temperature |
| CN113388713A (en) * | 2021-05-25 | 2021-09-14 | 鞍钢股份有限公司 | Treatment method for converter blowing oxygen lance incapable of normally striking fire |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002088410A (en) * | 2000-09-14 | 2002-03-27 | Nippon Steel Corp | Method for effectively using fly ash and iron-containing waste material |
| CN102337372A (en) * | 2011-10-27 | 2012-02-01 | 北京科技大学 | Cooling solidification recycling method for high-temperature liquid-state slag in steelmaking furnace |
| CN102888487A (en) * | 2012-10-12 | 2013-01-23 | 武汉钢铁(集团)公司 | High-efficiency remaining slag smelting method of converters |
| CN102925621A (en) * | 2012-11-13 | 2013-02-13 | 攀钢集团研究院有限公司 | Method for preventing dry dedusting system of semi-steel steel converter from explosion venting |
| CA2851604A1 (en) * | 2012-06-27 | 2014-01-03 | Nippon Steel & Sumitomo Metal Corporation | Method of reduction processing of steel-making slag |
| CN104451023A (en) * | 2013-09-24 | 2015-03-25 | 上海梅山钢铁股份有限公司 | Smelting method for retaining hot dreg of converter |
-
2016
- 2016-01-27 CN CN201610059280.2A patent/CN107012283B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002088410A (en) * | 2000-09-14 | 2002-03-27 | Nippon Steel Corp | Method for effectively using fly ash and iron-containing waste material |
| CN102337372A (en) * | 2011-10-27 | 2012-02-01 | 北京科技大学 | Cooling solidification recycling method for high-temperature liquid-state slag in steelmaking furnace |
| CA2851604A1 (en) * | 2012-06-27 | 2014-01-03 | Nippon Steel & Sumitomo Metal Corporation | Method of reduction processing of steel-making slag |
| CN102888487A (en) * | 2012-10-12 | 2013-01-23 | 武汉钢铁(集团)公司 | High-efficiency remaining slag smelting method of converters |
| CN102925621A (en) * | 2012-11-13 | 2013-02-13 | 攀钢集团研究院有限公司 | Method for preventing dry dedusting system of semi-steel steel converter from explosion venting |
| CN104451023A (en) * | 2013-09-24 | 2015-03-25 | 上海梅山钢铁股份有限公司 | Smelting method for retaining hot dreg of converter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110656215A (en) * | 2019-09-27 | 2020-01-07 | 山东钢铁股份有限公司 | Method for preventing unsuccessful blowing and igniting of converter |
| CN113201618A (en) * | 2021-03-19 | 2021-08-03 | 阳春新钢铁有限责任公司 | Production method for reducing down-converter times and reducing tapping temperature |
| CN113388713A (en) * | 2021-05-25 | 2021-09-14 | 鞍钢股份有限公司 | Treatment method for converter blowing oxygen lance incapable of normally striking fire |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107012283B (en) | 2018-10-09 |
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