Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
  • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
  • B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
  • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
• • 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
  • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F27—FURNACES; KILNS; OVENS; RETORTS
  • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
  • F27D3/00—Charging; Discharging; Manipulation of charge
  • F27D3/0024—Charging; Discharging; Manipulation of charge of metallic workpieces
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
  • B21B45/004—Heating the product
• • 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
  • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
  • C21D9/0018—Details, accessories not peculiar to any of the following furnaces for charging, discharging or manipulation of charge
• • 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
  • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
  • F27B9/021—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces having two or more parallel tracks
• • 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
  • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
  • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
  • F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
  • F27B9/2407—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor the conveyor being constituted by rollers (roller hearth furnace)

Definitions

• This invention relates to the production of metal strip from molten metal.
• Continuous casters which are capable of casting metal bars are known.
• the caster has a mould
• the mould may have a curved mould passage which causes the cast bar to leave the mould in a direction inclined in the vertical and means are provided downstream of the mould to complete the change of direction of movement
• the bar After casting, the bar is cut into convenient lengths which are subsequently rolled one at a time in a multistand hot strip mill to produce strip of the required gauge. Between the caster and the rolling mill, furnace means are provided for maintaining the temperature of the cast bars to a value suitable for entry to the hot strip rolling mill.
• the capacity of the hot strip rolling mill may be greater than the capacity of the continuous
• a "multistrand" caster may be provided which produces at least two parallel strands and thus a series of pairs of adjacent cast bars. This has the
• the continuous caster being arranged to produce at least two parallel strands which then pass through means for cutting into
• said furnace means including transfer means comprising a roller table of sufficient width to accommodate at least two parallel bars, with support means movable between the rollers,
• the arrangement is such that a first one of the strand paths is in line with the rolling mill, the transfer means being adapted to transfer a bar from the or another path, into the in-line position, each time a bar from the said first path has been transferred into the rolling mill.
• a two row furnace is preceded by an "Enco transfer" which is preceded by separate strand furnaces and which is arranged to move the bar from the second
• Figure 1 is a diagrammatic plan view of the layout of a first type of continuous casting
• Figure 2 is a vertical cross-section on the line X-X of Figure 1 (and also in Figure 3) showing the transfer means;
• Figure 3 is a diagrammatic plan view of a second type of installation also incorporating
• a twin strand caster 2 receives a molten metal and produces a pair of parallel strands between 50 and 100 mm thickness, which are cast vertically and then turned through 90° into horizontal position.
• the bars pass through respective pairs of shears 4, which shear them into lengths, each of which enter a respective tunnel furnace 6 or 8. These furnaces maintain the temperature of the bars, so that they do not cool down too much before entering the
• one of the furnaces 6 is in alignment with the axis of the remainder of the path through the rolling mill, whilst the other furnace 8, is offset by the normal spacing between the two outputs of the twin strand caster. As indicated on the drawing, this results in an initial pair of bars A and B being positioned in the two furnaces.
• the furnace 22 is then followed by further conventional stages of the rolling mill, including a rougher/edger station 24, and a further furnace 26 defining a position H, leading to finishing
• the bars are cast at approximately 50 mm thick and 900 to 1350
• the shears are arranged to cut the strands into 25 metre long pieces, and the rolled strip will finally issue from the finishing strands at 5 - 12 metres per second. It is preferable to provide two down coilers 30 and 32, which can be shifted into receiving position alternately.
• C and D to be on 1900 mm centres, rather than on the initial 8 metre centres.
• FIG. 3 A further simplification is achievable by means of the arrangement of Figure 3, in which a "split-mould" caster 34 is used so that the two strands are very close together.
• the mould may have a central partition which is only 150-300 mm wide so that the strands are
• a further advantage of the "split-mould" caster is that a single wide strand can be

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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)
• Metal Rolling (AREA)
• Continuous Casting (AREA)

Applications Claiming Priority (3)

Publications (1)

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ID=10813882

Family Applications (1)

Country Status (8)

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• 1997
  • 1997-06-09 GB GBGB9712010.9A patent/GB9712010D0/en active Pending
• 1998
  • 1998-06-05 WO PCT/GB1998/001663 patent/WO1998056517A1/en not_active Application Discontinuation
  • 1998-06-05 EP EP98925854A patent/EP0988119A1/de not_active Withdrawn
  • 1998-06-05 CN CN98806008A patent/CN1259888A/zh active Pending
  • 1998-06-05 AU AU77826/98A patent/AU7782698A/en not_active Abandoned
  • 1998-06-05 JP JP50187999A patent/JP2002503155A/ja active Pending
  • 1998-06-05 KR KR1019997011606A patent/KR20010013597A/ko not_active Application Discontinuation
  • 1998-06-05 BR BR9809542-0A patent/BR9809542A/pt unknown

Non-Patent Citations (1)

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