WO2005116276A1 - Four de rechauffage metallurgique - Google Patents

Four de rechauffage metallurgique Download PDF

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Publication number
WO2005116276A1
WO2005116276A1 PCT/CN2004/000539 CN2004000539W WO2005116276A1 WO 2005116276 A1 WO2005116276 A1 WO 2005116276A1 CN 2004000539 W CN2004000539 W CN 2004000539W WO 2005116276 A1 WO2005116276 A1 WO 2005116276A1
Authority
WO
WIPO (PCT)
Prior art keywords
furnace
heating
block
water pipe
furnace bottom
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.)
Ceased
Application number
PCT/CN2004/000539
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English (en)
Chinese (zh)
Inventor
Dongping Zhang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CN 200420059670 external-priority patent/CN2700336Y/zh
Priority claimed from CN 200420059671 external-priority patent/CN2700799Y/zh
Application filed by Individual filed Critical Individual
Priority to CNB2004800429276A priority Critical patent/CN100475978C/zh
Publication of WO2005116276A1 publication Critical patent/WO2005116276A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories or equipment specially adapted for furnaces of these types
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/70—Furnaces for ingots, i.e. soaking pits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B9/3005—Details, accessories or equipment specially adapted for furnaces of these types arrangements for circulating gases

Definitions

  • the invention belongs to the technical field of metallurgy, and relates to a furnace-type structure of a heating furnace, in particular to a furnace-type structure of a heating furnace for metallurgy. Background technique
  • the space In the furnace space of the heating furnace of the metallurgical industry, in addition to the heated steel block and the supporting block (or the slider, the same below), the heat-insulation coating layer of the water-cooled furnace bottom tube and the water-cooled furnace bottom tube, the space is empty. After the fuel is burned in the furnace, the furnace gas flows in a laminar flow. After the steel material moves forward on the pad and is heated to a predetermined temperature, it is removed from the heating furnace to enter the next process. Beneath the spacer is a furnace bottom longitudinal pipe. The spacer is fixed to the furnace bottom longitudinal pipe. The furnace bottom longitudinal pipe is filled with continuous cooling water.
  • the spacer can reduce the loss of heat transmitted by the steel material to the cooling water pipe during the heating process, and form a black mark on the steel material (local low temperature area).
  • the shape of the block is a hexagon, a polyhedron or a cylinder, and the material is metal.
  • the installation method of the pads on the vertical water pipe at the bottom of the heating furnace is arranged in a line, and the spacing between the pads is 10 ⁇ 20mm.
  • the thermal insulation banding layer between the cushion block and the horizontal centerline of the furnace vertical pipe is small in height, width and slope.
  • the block body has a large heat transfer area, a large thermal conductivity, and a strong thermal conductivity.
  • the temperature of the contact surface between the top of the block and the steel material is low.
  • the steel material passes through the block body to the cooling water in the vertical water pipe at the bottom of the furnace. More heat is lost.
  • the pads are in contact with the steel material in one line. The number of contact with the pads is large, and the cumulative contact area is large.
  • the thermal insulation banding between the pad body and the horizontal centerline of the vertical water pipe at the bottom of the furnace is easy to deposit slag
  • the pad block and the slag deposit layer shield the radiant heat transfer area of the high temperature furnace to the steel material, and the shielding heat transfer time is long.
  • the heating black mark of the steel material is large, the steel temperature uniformity of the discharged steel material is poor, the quality of the heating product is poor, the thermal efficiency of the furnace is low, the unit fuel consumption is high, the heating time required to eliminate the black mark of the steel material heating is long, and the furnace hour output Low, low heating capacity.
  • the present invention is to overcome the above-mentioned shortcomings, and the purpose is to solve the problems existing in the furnace structure of the traditional heating furnace.
  • the invention provides a steel material with a small black mark on heating, good steel temperature uniformity, and good quality of heating products.
  • Hearth heat The furnace structure of a new type of heating furnace with high efficiency, low unit fuel consumption, high kiln production time and high heating capacity. Brief description of the furnace type structure of a heating furnace of the present invention:
  • the furnace-type structure of a heating furnace according to the present invention is characterized in that a solid radiator obstacle made of refractory material for blocking, guiding, and disturbing the flow of furnace gas is provided in the furnace space, and is constructed on the furnace bottom and the furnace roof.
  • Inner surface Use the casting method to produce pads, set holes, or depressions, grooves, or voids in the body of the pads, or embed non-metallic materials with low thermal conductivity or low melting points in the holes, depressions, grooves, or voids.
  • Metal material inlay Fix the grate block on the vertical water pipe at the bottom of the push-type heating furnace with a distance of 40 ⁇ 500mm.
  • the arrangement is single-line sequential or double-row staggered; the horizontal center of the block and the vertical water pipe at the bottom of the furnace
  • the outer edge of the insulation banding layer of the wire is slope-shaped, and its slope is the connection between the intersection of the horizontal centerline of the furnace bottom longitudinal water pipe and the outer arc of the semicircular thermal insulation banding layer below the furnace bottom longitudinal water pipe and any point on the cushion body. line.
  • the invention is applied to a heating furnace in the metallurgical industry.
  • the furnace has high thermal efficiency, saves fuel heat energy, and has low unit fuel consumption.
  • the billet heating process can be optimized, the steel material has a small black mark, and the steel temperature of the steel is good.
  • the steel material has a short heating time, a high output of the furnace kiln, and a large heating capacity; the arrangement spacing of the pads has been changed, so that the amount of expensive metal pads is reduced, and equipment investment is reduced.
  • the present invention Compared with the traditional heating furnace using the present invention:
  • Figure 1 is a schematic diagram of the structure of a solid obstacle in the furnace space to block, guide and disturb the flow of furnace gas
  • Fig. 2 is a cross-sectional view taken along the line A-A of Fig. 1
  • Fig. 3 is a cross-sectional view taken along the line B-B of Fig. 1.
  • Fig. 4 is a schematic structural diagram of a block for a heating furnace
  • Fig. 5 is a sectional view of a cushion provided with holes in the body
  • Fig. 6 is a sectional view of a cushion block provided on the body
  • Fig. 7 is a sectional view of a cushion block provided with a groove on the body
  • FIG. 8 is a sectional view of a cushion provided with a cavity in the body
  • FIG. 9 is a single line sequential arrangement view of the block body on the vertical water pipe at the bottom of the push-type heating furnace.
  • FIG. 10 is a double row stagger view of the block body on the vertical water pipe at the bottom of the push-type heating furnace.
  • Fig. 11 is a sectional view of a block body, a vertical water pipe and a heat-insulating banding layer.
  • Detailed description of the invention-A furnace structure of a heating furnace according to the present invention is realized according to the following working principle of steel heating. '
  • Solids have a continuous radiation spectrum, which can absorb and radiate radiant energy of all wavelengths, while gas can only absorb and radiate radiant energy in a few wavelength ranges.
  • the diatomic gases in the furnace gas such as N 2 , 0 2 and their mixtures, account for about 40 ⁇ 50%.
  • Their radiant capacity is very small, their comprehensive radiant capacity and blackness coefficient are small, about 0.3, and the furnace radiant heat transfer low efficiency.
  • the solid radiation capacity and blackness coefficient are about 0.9, and the radiation heat transfer efficiency of the furnace is high.
  • the solid convection, radiation, and heat transfer area in the furnace chamber result in high comprehensive heat transfer efficiency in the furnace chamber.
  • the heat conduction area in the middle and lower parts of the cushion block is small, the thermal conductivity is small, and the heat conduction capacity is small. high.
  • the temperature difference between the contact surface of the steel material and the pad is small, the heat loss of the steel material passing through the pad to the cooling water pipe is small, the black mark of the steel material heating is small, and the furnace thermal efficiency is high.
  • the reduction of the amount of pads, the block body shielding the high-temperature furnace has a small radiant heat transfer area to the steel, and the furnace has a high heat transfer efficiency, which results in that the steel gets more heat from the furnace in this part, and the black mark of the steel is small.
  • the outer edge of the thermal insulation banding layer between the pad and the horizontal centerline of the furnace vertical pipe is slope-shaped, and the slope is large.
  • the iron oxide slag of the steel material falls off the slope of the thermal insulation banding layer because its own gravity is greater than the slope.
  • the upper frictional resistance automatically slides down to the bottom of the furnace to prevent the slag accumulation on the slope from shielding the radiant heat transfer of the high temperature furnace to the steel material to generate a heated black mark.
  • 1 is a solid radiator obstacle
  • 2 is a steel material
  • 3 is a pad
  • 4 is a burner
  • 5 is a vertical pipe
  • 6 is a furnace space
  • a solid radiator obstacle 1 made of a refractory material for blocking, guiding, and disturbing the flow of the furnace gas is provided in the furnace space 6, and is masonry and hanging in the furnace space 6 Inside surface of the furnace bottom and furnace top.
  • FIG. 3 is a pad
  • 5 is a vertical pipe
  • 7 is a hole
  • 8 is a depression
  • 9 is a groove
  • 10 is a hollow
  • 11 is an inlay.
  • holes 7 or depressions 8, grooves 9, and cavities 10 are provided to reduce the cross-sectional area of the middle and lower parts of the pad to be smaller than the cross-sectional area of the upper part of the pad, or in the hole.
  • the depression 8, the groove 9, and the cavity 10 are inlaid with a non-metallic material having a low thermal conductivity or a metallic material inlay 11 with a low melting point, so that the thermal conductivity of the middle and lower portions of the pad 3 is smaller than that of the upper portion of the pad.
  • the spacer 3 is fixed to the vertical water pipe 5 on the bottom of the heating furnace by means of a rigid connection or inlay.
  • the distance between the two spacers is 40 ⁇ 500mm.
  • the arrangement of the pads 3 on the vertical water pipes 5 on the bottom of the heating furnace is a single-line sequential arrangement; as shown in FIG. 10, the arrangement of the pads 3 on the vertical water pipes 5 on the bottom of the heating furnace is a double-row staggered arrangement.
  • FIG. 11 See Figure 11 for a cross-section view of the cushion block, the vertical pipe, and the thermal insulation banding layer.
  • 12 is the thermal insulation banding layer
  • 13 the lower semicircular thermal insulation banding layer
  • 14 is the intersection point
  • 15 is the intersection point.
  • the outer edge of the thermal insulation banding layer 12 between the cushion block 3 and the horizontal centerline of the furnace bottom vertical water pipe 5 is sloped, and its slope is the thermal insulation banding under the horizontal centerline of the furnace bottom vertical water pipe 5 and the furnace bottom vertical water pipe 5.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Tunnel Furnaces (AREA)

Abstract

L'invention concerne un four de réchauffage métallurgique. Ce four est pourvu d'un ensemble de barrières radiateurs solides en matériau réfractaire, disposées au niveau de la partie supérieure et du sommet du four afin de contenir, diriger et modifier le flux de gaz. Des trous, des affaissements ou des rainures sont formés sur des cales de blocage et remplis par un matériau métallique ou non métallique présentant un faible point de fusion. Les cales de blocage sont fixées sur la longueur d'un tuyau acheminant de l'eau de refroidissement au niveau de la partie inférieure du four, et elles sont disposées en ligne ou décalées sur deux lignes. L'intervalle entre les cales de blocage est compris entre 40 et 500 mm. La marge extérieure de la couche d'isolation thermique entre une cale de blocage et le tuyau est un plan incliné. La présente invention permet d'optimiser les processus de réchauffage d'acier et d'obtenir de plus petits poinçons de réchauffage. Le changement de matériau pour les cales de blocage permet de réduire la consommation de matériau métallique et de réduire l'investissement dans différents dispositifs.
PCT/CN2004/000539 2004-05-24 2004-05-26 Four de rechauffage metallurgique Ceased WO2005116276A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2004800429276A CN100475978C (zh) 2004-05-24 2004-05-26 一种加热炉的炉型结构

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN200420059671.7 2004-05-24
CN 200420059670 CN2700336Y (zh) 2004-05-24 2004-05-24 一种加热炉用滑块的装设布置
CN200420059670.2 2004-05-24
CN 200420059671 CN2700799Y (zh) 2004-05-24 2004-05-24 一种加热炉膛内设置固体障碍物的炉型结构

Publications (1)

Publication Number Publication Date
WO2005116276A1 true WO2005116276A1 (fr) 2005-12-08

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Application Number Title Priority Date Filing Date
PCT/CN2004/000539 Ceased WO2005116276A1 (fr) 2004-05-24 2004-05-26 Four de rechauffage metallurgique

Country Status (1)

Country Link
WO (1) WO2005116276A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103103337A (zh) * 2013-02-21 2013-05-15 武汉钢铁(集团)公司 减小步进梁加热炉钢坯水梁黑印的方法
CN108680030A (zh) * 2018-06-14 2018-10-19 攀钢集团攀枝花钢钒有限公司 防止步进式加热炉结瘤的垫块结构
CN111721130A (zh) * 2019-11-15 2020-09-29 北京科大京都高新技术有限公司 一种用于轧钢加热炉的耐热垫块固定结构

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2495750A1 (fr) * 1980-12-10 1982-06-11 Siderurgie Fse Inst Rech Four continu pour le chauffage inductif de produits electroconducteurs solides
CN1020954C (zh) * 1989-05-13 1993-05-26 济南钢铁总厂 炉外短滑坡端出料加热炉
US5479808A (en) * 1989-07-31 1996-01-02 Bricmanage, Inc. High intensity reheating apparatus and method
CN2378701Y (zh) * 1999-07-09 2000-05-17 张东平 一种加热炉用滑轨滑块
US6241515B1 (en) * 2000-05-30 2001-06-05 Tat Technologies, Inc Device and method for treating combustibles obtained from a thermal processing apparatus and apparatus employed thereby
CN1393675A (zh) * 2001-06-21 2003-01-29 张东平 一种无水冷加热炉

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2495750A1 (fr) * 1980-12-10 1982-06-11 Siderurgie Fse Inst Rech Four continu pour le chauffage inductif de produits electroconducteurs solides
CN1020954C (zh) * 1989-05-13 1993-05-26 济南钢铁总厂 炉外短滑坡端出料加热炉
US5479808A (en) * 1989-07-31 1996-01-02 Bricmanage, Inc. High intensity reheating apparatus and method
CN2378701Y (zh) * 1999-07-09 2000-05-17 张东平 一种加热炉用滑轨滑块
US6241515B1 (en) * 2000-05-30 2001-06-05 Tat Technologies, Inc Device and method for treating combustibles obtained from a thermal processing apparatus and apparatus employed thereby
CN1393675A (zh) * 2001-06-21 2003-01-29 张东平 一种无水冷加热炉

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GAO X.: "Comprehensive Modernization of Reheating Furnace for 280 mm Rolling Mill", IRON AND STEEL, vol. 30, no. 3, March 1995 (1995-03-01), pages 63 - 67 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103103337A (zh) * 2013-02-21 2013-05-15 武汉钢铁(集团)公司 减小步进梁加热炉钢坯水梁黑印的方法
CN103103337B (zh) * 2013-02-21 2014-04-16 武汉钢铁(集团)公司 减小步进梁加热炉钢坯水梁黑印的方法
CN108680030A (zh) * 2018-06-14 2018-10-19 攀钢集团攀枝花钢钒有限公司 防止步进式加热炉结瘤的垫块结构
CN111721130A (zh) * 2019-11-15 2020-09-29 北京科大京都高新技术有限公司 一种用于轧钢加热炉的耐热垫块固定结构

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