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
  • C21C5/30—Regulating or controlling the blowing
  • C21C5/32—Blowing from above
• • 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
  • C21C5/46—Details or accessories
  • C21C5/4673—Measuring and sampling devices
• • 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
  • F27D19/00—Arrangements of controlling devices
• • 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
  • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
• • 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
  • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
  • F27D21/0014—Devices for monitoring temperature
• • 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

Definitions

• the present invention proposes a sublance provided with a protecting device preventing splattering of molten metal or slag onto the shoulder region of the top lance.
• the protecting device stored in the rack has a diameter similar to the diameter of the sublance.
• a new sublance is inserted over a coupling portion of the top lance until it reaches a shoulder formed by a handling portion of the top lance which has a diameter larger than the sublance. Because of vibrations during use, it is possible that the sublance loses contact with the shoulder forming a small gap.
• the molten metal (11) or the slag floating at the surface thereof can be agitated, either because a vessel is in movement or, in case of a steelmaking converter, because oxygen is being sparged, creating splatters (11s) which can reach a top of the sublance and even the shoulder or, if there is one, a gap between said shoulder and the top of the sublance.
• the solution has the advantage that the conformance of the protecting device to a surface of the top lance and conformance to a surface of the sublance is the result of the deformation of the entire device, rather than the deformation of a surface of an elastic material.” and “This solution has the advantage that the expandable radially protective device expands only after the top lance and sublance have been joined axially, thus reducing the possibility of damage during handling and assembly.
• the protective device of the foregoing first and second embodiment can be cylindrical, or can comprise one or more cylindrical portions and one or more tapered or curved portions distributed along the longitudinal axis (X).
• Figure 6(c) shows the sublance of Figure 6(b) partially inserted over the coupling portion of the top lance of Figure 6(b), with a top surface of the second embodiment of the protective device still separated from the shoulder and already at least partially deformed by the introduction of the coupling portion.
• a given probe holder can be used a number of times without replacement, but because of the severe conditions of use it is exposed to, it degrades rapidly and, unlike the handling portion (1 h) and the fixed element (1 f), the probe holder needs be replaced at regular intervals.
• the probe holder (1 p) can be reversibly coupled to the fixed element (1f) to form the coupling portion (1c) by mechanical means, such as a thread as illustrated in Figures 4(a) and 6(a), a bayonet, snap fits, and the like.
• the coupling portion (1c) must penetrate further, deeper into the cavity, which applies a compressive force along the longitudinal axis (X) onto the protective device (3) which is deformed to reach the deformed configuration.
• a compressive force along the longitudinal axis (X) upon application of a compressive force along the longitudinal axis (X), the two-tube substantially cylindrical protective device buckles at mid-height (measured along the longitudinal axis (X)) forming a geometry of the type comprising two inverted funnels joined to one another at a broad end of each funnel.
• the diameter (D3d) at the level of the folding of the stripes of materials must be at least equal to the diameter (D2) of the distal end of the top lance (D3d > D2).
• the protective device (3) comprises a single tube which is deformable upon application thereto of a compressive force along the longitudinal axis (X).
• the tube extends along the longitudinal axis (X) and forms an inner passage of diameter (D3i) with D3i > d1 .
• the tube (3i) comprises a number of slits (3s) separated from one another and distributed over a circumference of the tube.
• the slits extend over at least 70%, preferably at least 80%, more preferably at least 90% of a height of the tube measured along the longitudinal axis (X).
• each inner portion (3pi) has a free edge which is shorter than the corner, measured normal to the longitudinal axis (X), as can be seen in Figures 5(a) to 5(c).
• X longitudinal axis
• the protective device (3) when the protective device (3) is in the initial configuration and the inner portions (3pi) extend radially inwards, they do not overlap with one another. They need not form a continuous screen, as in the initial configuration the sublance is not coupled to the top lance and is therefore not in use.
• the L-shaped plates pivot to reach the deformed configuration, they contact the wall of the cavity, and should preferably not overlap with one another to allow as large a cavity opening as possible to admit the coupling portion (1c) of diameter (d1) into the cavity (2v).

Applications Claiming Priority (3)

Publications (1)

Family

ID=78777606

Family Applications (1)

Country Status (10)

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• 2021
  • 2021-01-08 CA CA3161882A patent/CA3161882A1/en active Pending
  • 2021-01-08 MX MX2022008553A patent/MX2022008553A/es unknown
  • 2021-01-08 CN CN202180008415.1A patent/CN115298333B/zh active Active
  • 2021-01-08 TW TW110100776A patent/TW202132577A/zh unknown
  • 2021-01-08 KR KR1020227027234A patent/KR20220149775A/ko active Search and Examination
  • 2021-01-08 EP EP21701050.3A patent/EP4087951A1/de active Pending
  • 2021-01-08 JP JP2022542230A patent/JP2023510317A/ja active Pending
• 2022
  • 2022-07-07 CL CL2022001853A patent/CL2022001853A1/es unknown
  • 2022-07-14 ZA ZA2022/07847A patent/ZA202207847B/en unknown
  • 2022-08-05 CO CONC2022/0011136A patent/CO2022011136A2/es unknown

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