CN110396567A - Reduce the furnace bottom air supply brick layout structure and bottom blowing process of converter terminal carbon oxygen product - Google Patents

Reduce the furnace bottom air supply brick layout structure and bottom blowing process of converter terminal carbon oxygen product Download PDF

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Publication number
CN110396567A
CN110396567A CN201910783904.9A CN201910783904A CN110396567A CN 110396567 A CN110396567 A CN 110396567A CN 201910783904 A CN201910783904 A CN 201910783904A CN 110396567 A CN110396567 A CN 110396567A
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air supply
brick
distributed
pieces
ring
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CN110396567B (en
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李涛
战昱明
孙逊
李瑞鹏
张程
徐福余
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ANSHAN HE FENG REFRACTORY MATERIAL Co Ltd
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ANSHAN HE FENG REFRACTORY MATERIAL Co Ltd
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    • 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
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/34—Blowing through the bath
    • 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
    • C21C5/42—Constructional features of converters
    • C21C5/44—Refractory linings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • 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)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Abstract

The present invention relates to the furnace bottom air supply brick layout structures and bottom blowing process of a kind of reduction converter terminal carbon oxygen product, 12-18 block air supply brick including being distributed in converter bottom, 12-18 block air supply brick be arranged in the inner ring of furnace bottom, middle ring, three different-diameters of outer ring circumference on；Inner ring is distributed 4-6 block air supply brick, and middle ring is distributed 4-6 block air supply brick, and outer ring is distributed 4-6 block air supply brick.The present invention changes bottom blowing arrangement mode, while controlling bottom blowing total flow and air supply intensity to reduce converter terminal carbon oxygen product, converter terminal carbon oxygen product average value can be made to reach 0.0018, and index is relatively stable.Smelting operation of the invention is simple, and carbon oxygen product index is relatively stable, and Cleanliness of Molten Steel and yield of alloy increase.

Description

Reduce the furnace bottom air supply brick layout structure and bottom blowing process of converter terminal carbon oxygen product
Technical field
The present invention relates to converter steeling technology field more particularly to a kind of furnace bottom air supply bricks for reducing converter terminal carbon oxygen product Layout structure and bottom blowing process.
Background technique
The height of converter terminal carbon oxygen product has important influence to Cleanliness of Molten Steel and yield of alloy, is that production is high-quality The critical index of kind clean steel, to reduce converter terminal carbon oxygen product, scientific research personnel, which attempts a variety of methods, reduces converter terminal Carbon oxygen product, 1, into molten steel waste magnesia carbon brick is added and introduces fluorite simultaneously and make catalyst, 2, reasonably adjust oxygen lance position, oxygen supply intensity And bottom blowing Argon intensity is to reach the target for reducing converter terminal carbon oxygen product 0.0018.Above method technological operation is relative complex And it is not easy to control, in addition carbon oxygen product index is unstable, therefore studies a kind of side for simply and effectively reducing converter terminal carbon oxygen product Formula has important practical significance the quality for improving steel.
Summary of the invention
The purpose of the present invention is to provide a kind of furnace bottom air supply brick layout structure of reduction converter terminal carbon oxygen product and bottom blowings Technique changes bottom blowing arrangement mode, while controlling bottom blowing total flow and air supply intensity to reduce converter terminal carbon oxygen product, this method Converter terminal carbon oxygen product average value can be made to reach 0.0018, and index is relatively stable.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
The furnace bottom air supply brick layout structure for reducing converter terminal carbon oxygen product, the 12-18 block including being distributed in converter bottom supply Gas brick, 12-18 block air supply brick be arranged in the inner ring of furnace bottom, middle ring, three different-diameters of outer ring circumference on；Inner ring distribution 4-6 block air supply brick, middle ring are distributed 4-6 block air supply brick, and outer ring is distributed 4-6 block air supply brick.
The furnace bottom air supply brick layout structure for reducing converter terminal carbon oxygen product, 12 blocks of gas supply including being distributed in converter bottom Brick, 12 pieces of air supply bricks be arranged in the inner ring of furnace bottom, middle ring, three different-diameters of outer ring circumference on；Inner ring is distributed 4 pieces of confessions In addition gas brick is arranged symmetrically on the line in tapping side and charging side for two pieces wherein two pieces are arranged symmetrically on trunnion line；In Ring is distributed 4 pieces of air supply bricks, is arranged symmetrically in trunnion line on the straight line of 45° angle；Outer ring is distributed 4 pieces of air supply bricks, symmetrical cloth It sets on the straight line for being in 22.5 ° of angles with trunnion line.
The furnace bottom air supply brick layout structure for reducing converter terminal carbon oxygen product, 18 blocks of gas supply including being distributed in converter bottom Brick, 18 pieces of air supply bricks be arranged in the inner ring of furnace bottom, middle ring, three different-diameters of outer ring circumference on；The uniformly distributed 6 pieces of confessions of inner ring Gas brick, middle ring are evenly distributed with 6 pieces of air supply bricks, and outer ring is evenly distributed with 6 pieces of air supply bricks, and inner ring air supply brick and outer ring air supply brick are in same angle cloth It sets, middle ring air supply brick and inner ring air supply brick and outer ring the air supply brick 30 ° of angles that are staggered are arranged.
The circle diameter of inner ring is 1800-2600mm, and the circle diameter of middle ring is 2200-3200mm, and the circumference of outer ring is straight Diameter is 2700-4000mm.
The air supply brick includes magnesia carbon brick, bundle pipes, and the bundle pipes are prefabricated in magnesia carbon brick.
The magnesia carbon brick is large-scale bottom brick, and brick is wedge shape, and the opposite sides of brick body is circular arc type, in addition opposite two Side is straight flange, and the long L of brick is 900-1300mm；The chord length D of the orthodrome of brick body large end face1For 500-720mm, the radius of orthodrome R1For 900-2000mm, the chord length d of small arc-shaped1For 400-620mm, the radius r of small arc-shaped1For 800-1900mm；Brick body small end face Orthodrome chord length D2For 400-640mm, the radius R of orthodrome2For 800-1850mm, the chord length d of small arc-shaped2For 350- 580mm, the radius r of small arc-shaped2For 650-1660mm.
The bundle pipes include general pipeline and several single branch bundle pipes, and the general pipeline mutually connects with several single branch bundle pipes Logical, single branch bundle pipes distribution is φ 90mm- φ 200mm.
Reduce the bottom blowing process that the furnace bottom air supply brick layout structure of converter terminal carbon oxygen product is used cooperatively, each period smelting of converter Refine bottom blowing flow and intensity requirement are as follows: total gas flow rate controls 10-15Nm when iron making3/ min, intensity 0.05-0.08Nm3/ min.t；Blowing process requires gas flow 30-35Nm3/ min, intensity 0.15-0.20Nm3/min.t；Gas flow is required when tapping 10-15Nm3/ min, intensity 0.05-0.08Nm3/min.t；Splash slag phase requirement total gas flow rate 15-22Nm3/ min, intensity 0.08- 0.13Nm3/min.t；Slag, waiting period total gas flow rate 8-15Nm3/ min, intensity 0.04-0.08Nm3/min.t。
Compared with prior art, the beneficial effects of the present invention are:
The present invention changes bottom blowing arrangement mode, while controlling bottom blowing total flow and air supply intensity to reduce converter terminal carbon oxygen Product can make converter terminal carbon oxygen product average value reach 0.0018, and index is relatively stable.Smelting operation of the invention is simple, Carbon oxygen product index is relatively stable, and Cleanliness of Molten Steel and yield of alloy increase.
Detailed description of the invention
Fig. 1 is the distributed architecture schematic diagram (one) of furnace bottom air supply brick of the present invention.
Fig. 2 is the distributed architecture schematic diagram (two) of furnace bottom air supply brick of the present invention.
Fig. 3 is the structural schematic diagram of single furnace bottom air supply brick of the invention.
Fig. 4 is the structural schematic diagram of bundle pipes in the present invention.
In figure: 1- outer ring air supply brick, 2- middle ring air supply brick, 3- inner ring air supply brick, 4- bundle pipes, 5- magnesia carbon brick, the mono- branch of 6- Bundle pipes, 7- general pipeline.
Specific embodiment
Specific embodiments of the present invention will be further explained below:
The furnace bottom air supply brick layout structure for reducing converter terminal carbon oxygen product, the 12-18 block including being distributed in converter bottom supply Gas brick, 12-18 block air supply brick be arranged in the inner ring of furnace bottom, middle ring, three different-diameters of outer ring circumference on；Inner ring distribution 4-6 block air supply brick, middle ring are distributed 4-6 block air supply brick, and outer ring is distributed 4-6 block air supply brick.
The embodiment one of the furnace bottom air supply brick layout structure of converter terminal carbon oxygen product is reduced, as shown in Figure 1, including distribution In 12 pieces of air supply bricks of converter bottom, 12 pieces of air supply bricks are arranged in three inner ring of furnace bottom, middle ring, outer ring different-diameters On circumference；Inner ring is distributed 4 pieces of air supply bricks and is in addition arranged symmetrically in tapping for two pieces wherein two pieces are arranged symmetrically on trunnion line On the line in side and charging side；Middle ring is distributed 4 pieces of air supply bricks, is arranged symmetrically in trunnion line on the straight line of 45° angle；Outer ring 4 pieces of air supply bricks are distributed, are arranged symmetrically in trunnion line on the straight line at 22.5 ° of angles.
The embodiment two of the furnace bottom air supply brick layout structure of converter terminal carbon oxygen product is reduced, as shown in Fig. 2, including distribution In 18 pieces of air supply bricks of converter bottom, 18 pieces of air supply bricks are arranged in three inner ring of furnace bottom, middle ring, outer ring different-diameters On circumference；Inner ring is evenly distributed with 6 pieces of air supply bricks, and middle ring is evenly distributed with 6 pieces of air supply bricks, and outer ring is evenly distributed with 6 pieces of air supply bricks, inner ring air supply brick 3 and outer Ring air supply brick 1 arranges in same angle, and middle ring air supply brick 2 and inner ring air supply brick 3 and outer ring the air supply brick 1 30 ° of angles that are staggered are arranged.
The circle diameter of inner ring is 1800-2600mm, and the circle diameter of middle ring is 2200-3200mm, and the circumference of outer ring is straight Diameter is 2700-4000mm.The circle diameter of inner ring is preferably 1850.8mm, and the circle diameter of middle ring is preferably 2236.8mm, outside The circle diameter of ring is preferably 2798.6mm.
The air supply brick includes magnesia carbon brick 5, bundle pipes 4, and the bundle pipes 4 are prefabricated in magnesia carbon brick 5.
See that Fig. 3, magnesia carbon brick 5 are large-scale bottom brick, brick is wedge shape, and the opposite sides of brick body is circular arc type, in addition relatively Two sides be straight flange, 5 preferred size of magnesia carbon brick are as follows: the long L of brick be 1100mm；The chord length D of the orthodrome of brick body large end face1For 567.7mm, the radius R of orthodrome1For 1766mm, the chord length d of small arc-shaped1For 432.9mm, the radius r of small arc-shaped1For 1347mm； The chord length D of the orthodrome of brick body small end face2For 460.3mm, the radius R of orthodrome2For 1432mm, the chord length d of small arc-shaped2For 351mm, the radius r of small arc-shaped2For 1092mm.
See that Fig. 4, the bundle pipes 4 include general pipeline 7 and several single branch bundle pipes 6, the general pipeline 7 and several single supports Beam tube 6 is interconnected, and single 6 distribution of branch bundle pipes is φ 90mm- φ 200mm.
The diameter of single branch bundle pipes 6 is 2-3mm in bundle pipes, and single arrangement of branch bundle pipes 6 is 4-6 ring, every ring arrangement number By the 1st ring 3-5 branch, the 2nd ring 5-8 branch, the 3rd ring 8-10 branch, the 4th ring 10-12 branch, the 5th ring 12-15 branch, the 6th ring 15-18 branch.
Embodiment 1:
By taking the 200 tons of converters of certain steel mill as an example, smelting condition are as follows: average 1665 DEG C of tapping temperature, highest tapping temperature 1720 DEG C, smelting cycle 48min, tap: 200t.Furnace bottom air supply brick design scheme: furnace bottom is divided into 12 pieces of air supply bricks of cloth, and 12 pieces Air supply brick be arranged in the inner ring of furnace bottom, middle ring, three different-diameters of outer ring circumference on；The circle diameter of inner ring is 2000mm, the circle diameter of middle ring are 3100mm, and the circle diameter of outer ring is 4000mm.
Inner ring is distributed 4 pieces of air supply bricks and is in addition arranged symmetrically in tapping for two pieces wherein two pieces are arranged symmetrically on trunnion line On the line in side and charging side；Middle ring is distributed 4 pieces of air supply bricks, is arranged symmetrically in trunnion line on the straight line of 45° angle；Outer ring 4 pieces of air supply bricks are distributed, are arranged symmetrically in trunnion line on the straight line at 22.5 ° of angles.
Converter each period smelts bottom blowing flow and intensity requirement: total gas flow rate controls 10Nm when iron making3/ min, intensity 0.05Nm3/ min.t, blowing process require gas flow 30Nm3/ min, intensity 0.15Nm3/ min.t, when tapping, require flow 10Nm3/ min, intensity 0.05Nm3/ min.t splashes slag phase requirement total gas flow rate 20Nm3/ min, intensity 0.1Nm3/ min.t, Slag, waiting period total gas flow rate 10Nm3/ min, intensity 0.05Nm3/min.t。
This furnace use as a servant it is offline after effect assessment: system is distributed and supplied using above-mentioned bottom blowing, full furnace labour aim carbon oxygen product is flat Mean value can reach 0.00188, and index is relatively stable, easy to control.

Claims (8)

1. reducing the furnace bottom air supply brick layout structure of converter terminal carbon oxygen product, which is characterized in that including being distributed in converter bottom 12-18 block air supply brick, 12-18 block air supply brick be arranged in the inner ring of furnace bottom, middle ring, three different-diameters of outer ring circumference On；Inner ring is distributed 4-6 block air supply brick, and middle ring is distributed 4-6 block air supply brick, and outer ring is distributed 4-6 block air supply brick.
2. the furnace bottom air supply brick layout structure according to claim 1 for reducing converter terminal carbon oxygen product, which is characterized in that packet 12 pieces of air supply bricks for being distributed in converter bottom are included, 12 pieces of air supply bricks are arranged in three inner ring, middle ring, outer ring differences of furnace bottom On the circumference of diameter；Inner ring is distributed 4 pieces of air supply bricks and is in addition arranged symmetrically for two pieces wherein two pieces are arranged symmetrically on trunnion line On the line in tapping side and charging side；Middle ring is distributed 4 pieces of air supply bricks, is arranged symmetrically in the straight line with trunnion line in 45° angle On；Outer ring is distributed 4 pieces of air supply bricks, is arranged symmetrically in trunnion line on the straight line at 22.5 ° of angles.
3. the furnace bottom air supply brick layout structure according to claim 1 for reducing converter terminal carbon oxygen product, which is characterized in that packet 18 pieces of air supply bricks for being distributed in converter bottom are included, 18 pieces of air supply bricks are arranged in three inner ring, middle ring, outer ring differences of furnace bottom On the circumference of diameter；Inner ring is evenly distributed with 6 pieces of air supply bricks, and middle ring is evenly distributed with 6 pieces of air supply bricks, and outer ring is evenly distributed with 6 pieces of air supply bricks, inner ring air supply brick It is arranged with outer ring air supply brick in same angle, middle ring air supply brick and inner ring air supply brick and outer ring the air supply brick 30 ° of angles that are staggered are arranged.
4. according to claim 1-3 its any one of described in reduce converter terminal carbon oxygen product furnace bottom air supply brick be laid out knot Structure, which is characterized in that the circle diameter of inner ring is 1800-2600mm, and the circle diameter of middle ring is 2200-3200mm, outer ring Circle diameter is 2700-4000mm.
5. according to claim 1-3 its any one of described in reduce converter terminal carbon oxygen product furnace bottom air supply brick be laid out knot Structure, which is characterized in that the air supply brick includes magnesia carbon brick, bundle pipes, and the bundle pipes are prefabricated in magnesia carbon brick.
6. the furnace bottom air supply brick layout structure according to claim 5 for reducing converter terminal carbon oxygen product, which is characterized in that institute Magnesia carbon brick is stated as large-scale bottom brick, brick is wedge shape, and the opposite sides of brick body is circular arc type, and in addition opposite two sides are straight flange, The long L of brick is 900-1300mm；The chord length D of the orthodrome of brick body large end face1For 500-720mm, the radius R of orthodrome1For 900- 2000mm, the chord length d of small arc-shaped1For 400-620mm, the radius r of small arc-shaped1For 800-1900mm；The orthodrome of brick body small end face Chord length D2For 400-640mm, the radius R of orthodrome2For 800-1850mm, the chord length d of small arc-shaped2For 350-580mm, roundlet The radius r of arc2For 650-1660mm.
7. the furnace bottom air supply brick layout structure according to claim 5 for reducing converter terminal carbon oxygen product, which is characterized in that institute Stating bundle pipes includes general pipeline and several single branch bundle pipes, and the general pipeline and several single branch bundle pipes are interconnected, single support Beam tube distribution is φ 90mm- φ 200mm.
8. claim 1-7 its any one of as described in reduction converter terminal carbon oxygen product furnace bottom air supply brick layout structure match Close the bottom blowing process used, which is characterized in that converter each period smelts bottom blowing flow and intensity requirement are as follows: gas always flows when iron making Amount control 10-15Nm3/ min, intensity 0.05-0.08Nm3/min.t；Blowing process requires gas flow 30-35Nm3/ min, intensity 0.15-0.20Nm3/min.t；Gas flow 10-15Nm is required when tapping3/ min, intensity 0.05-0.08Nm3/min.t；Splash slag Phase requires total gas flow rate 15-22Nm3/ min, intensity 0.08-0.13Nm3/min.t；Slag, waiting period total gas flow rate 8- 15Nm3/ min, intensity 0.04-0.08Nm3/min.t。
CN201910783904.9A 2019-08-23 2019-08-23 Layout structure of furnace bottom gas supply bricks for reducing carbon-oxygen deposit at converter end point and bottom blowing process Active CN110396567B (en)

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
CN110846459A (en) * 2019-12-17 2020-02-28 中冶南方工程技术有限公司 Converter and smelting method thereof
CN111041149A (en) * 2019-12-23 2020-04-21 河钢股份有限公司承德分公司 Method for improving bottom blowing effect of converter
CN111363881A (en) * 2020-03-31 2020-07-03 钢铁研究总院 Method for reducing free oxygen content of converter end-point metal molten pool
CN113930578A (en) * 2021-08-30 2022-01-14 山东钢铁集团日照有限公司 Optimization method of converter bottom blowing air brick
CN115232909A (en) * 2022-07-27 2022-10-25 河南科技大学 Converter bottom blowing method for converter steelmaking and converter

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110846459A (en) * 2019-12-17 2020-02-28 中冶南方工程技术有限公司 Converter and smelting method thereof
CN110846459B (en) * 2019-12-17 2023-09-15 中冶南方工程技术有限公司 Converter and smelting method thereof
CN111041149A (en) * 2019-12-23 2020-04-21 河钢股份有限公司承德分公司 Method for improving bottom blowing effect of converter
CN111363881A (en) * 2020-03-31 2020-07-03 钢铁研究总院 Method for reducing free oxygen content of converter end-point metal molten pool
CN113930578A (en) * 2021-08-30 2022-01-14 山东钢铁集团日照有限公司 Optimization method of converter bottom blowing air brick
CN113930578B (en) * 2021-08-30 2022-08-09 山东钢铁集团日照有限公司 Optimization method of converter bottom blowing air brick
CN115232909A (en) * 2022-07-27 2022-10-25 河南科技大学 Converter bottom blowing method for converter steelmaking and converter

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