US3693952A - Adjustable impact casing for a shaft furnace - Google Patents

Adjustable impact casing for a shaft furnace Download PDF

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Publication number
US3693952A
US3693952A US144978A US3693952DA US3693952A US 3693952 A US3693952 A US 3693952A US 144978 A US144978 A US 144978A US 3693952D A US3693952D A US 3693952DA US 3693952 A US3693952 A US 3693952A
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United States
Prior art keywords
segments
casing
push rods
secured
row
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Expired - Lifetime
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US144978A
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English (en)
Inventor
Gunter Schwerdtfeger
Bruno Kammerling
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Individual
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Individual
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Priority claimed from DE19702024190 external-priority patent/DE2024190C/de
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/08—Top armourings

Definitions

  • An adjustable impact casing for use in a shaft furnace is formed of a plurality of upwardly extending segments.
  • the segments are arranged into an inner circular row enclosed by an outer circular row. in each row, the segments are spaced angularly apart and are offset to the segments in the other row with their upwardly extending edges arranged in overlapping and substantially contacting relationship.
  • the segments are pivotally supported about axes arranged transversely of the upright axis of the casing and the segments in the inner row are secured to one drive arrangement while the segments in the outer row are secured to another but similar drive arrangement.
  • the two drive arrangements are controlled for moving the segments so that a time delay is provided between the movement of the segments in the inner row and the movement of the segments in the outer row.
  • the present invention is directed to an adjustable protection or impact casing in a shaft furnace, particularly for use in blast furnaces, and, more especially, it concerns the arrangement of the casing made up of two circular rows of individual segments which are suspended for pivotal movement into a desired position.
  • the segments forming the casing are adjustable either individually or jointly.
  • the segments can be adjusted to vary the diameter of the casing and the angular disposition of its surfaces so that the distribution of the furnace burden over the furnace cross section can be changed.
  • the area that can be influenced is small and involves essentially the annular area between the furnace wall and the outer edge of the furnace-top bell. In the circular area under the bell the distribution of the charge cannot be influenced. As a result, this space is filled in accordance with the slope angle of the materials charged into the furnace. As the size of furnace units become larger that portion of the area under the bell which cannot be influenced by the adjustable impact casing becomes increasingly larger relative to the total charge cross section in the furnace.
  • the adjustment angle of the casing be simply increased, especially for use in large furnaces.
  • the burden materials could be deflected into annular areas the diameter of which would be smaller than that of the furnace-top bell.
  • difficulties are encountered with such wide angular adjustment ranges, since the segments of the casing are formed with a fixed radius.
  • the radial clearance between the segments which overlap along their lateral edges is decreased.
  • the radial clearance must be increased as the range of adjustment is increased for the casing. In this regard the danger exists that the burden material may become jammed between the individual segments so that the adjustment of the casing is impeded. If the casing cannot be properly adjusted in position, then it will not be able to influence the charge in the furnace in the desired manner.
  • the segments forming the casing are arranged in an inner circular row located adjacent an outer circular row with the segments being controlled so that a time delay is provided between the segments in the inner row and in the outer row.
  • an inward adjustment can be made, first, by moving the segments in the inner row into the desired position and then moving the segments in the outer row.
  • the positioning procedure is reversed.
  • a predetermined radial clearance between the segments in the inner row and outer row can be dispensed with, since in each position within the range of adjustment of the segments they can be arranged so that they meet or contact along their upright lateral edges. Accordingly, the difficulties experienced 0 in the past in adjusting segments formed with a fixed radius are avoided, especially where a relatively wide range of adjustment is involved.
  • the segments within each of the rows can be operated individually or jointly, and controls of hydraulic, pneumatic or electrical types can be connected in combination with a time delay for moving the segments in one row before the segments in the other row can be moved. It is advantageous to connect the positioning drives for the segments of the inner row to one control unit and the positioning drives of the segments of the outer row to another control circuit and to interconnect the control circuits via a time-delay relay.
  • the individual positioning elements for each segment in one row can be connected to a ring-shaped member and the controls for the individual rings interconnected through a time-delay so that first the segments in one of the rows are positioned followed by the positioning of the segments in the other row.
  • FIG. 1 is a partial vertical cross sectional view of the top of a blast furnace incorporating the present invention
  • FIG. 2 is a cross sectional view taken along the line II-II in FIG. 1;
  • FIG. 3 is a view similar to FIG. 1 but illustrating another embodiment of the invention.
  • FIG. 4 is a schematic showing of the positioning arrangement in accordance with the present invention.
  • FIGS. 1 and 3 the upper part of a blast furnace is illustrated with an adjustable impact casing in accordance with the present invention.
  • the charge is directed into the furnace through its throat I when the furnace-top bell 2 is lowered, note the closed position shown in full lines and the lowered or opened position shown in dot-dash lines. Based on the diameter of the casing and the angular disposition of its surface, the charge directed into the blast furnace is given a certain profile as indicated in FIGS. 1 and 3.
  • the impact casing is formed of an inner row of impact-resistant segments 3 having a fixed radius and an outer row of impact-resistant segments 30 of a fixed radius with the lateral upright edges arranged in overlapping relationship.
  • the impact casing is formed of an inner row of impact-resistant segments 3 having a fixed radius and an outer row of impact-resistant segments 30 of a fixed radius with the lateral upright edges arranged in overlapping relationship.
  • the fixed radius of the segments is determined based on the furnace radius for an .intermediate position in the adjustment range of the segments.
  • Each of the segments 3, 3a is suspended within the shaft casing 4 of the blast furnace by means of rods 5 which are pivotally connected adjacent their upper ends of the inner surface of the shaft casing.
  • rods 5 which are pivotally connected adjacent their upper ends of the inner surface of the shaft casing.
  • a mounting member 6 is positioned and a push rod 7 is connected to each mounting 6 in a pivotal manner.
  • Furnace wall 9 of the-shaft casing 4 disposed opposite the impact cas- "ing has'a plurality of funnel-shaped openings 8 through which the push rod -7 extends outwardly. At its outer end, each push rod is secured, through a hinged joint,
  • the piston rod is movably positionable within an hydraulic cylinder 13 supported on the exterior wall of the shaft casing.
  • the hydraulic cylinders 13 are operated by a control member 14.
  • the segments 3 arranged in angularly spaced relationship within the inner row of the casing are adjusted in position by means of the piston rod 12, the arms 10, l l of the angle lever, and the push rod 7 so that they can be pivotally displaced through the connection of the bar 5 to the interior of the shaft casing 4 for varying the angle of inclination of the segment to the vertical axis of the casing and also for varying the distance of the segment from the center of the shaft casing.
  • Similar hydraulic cylinders l3aand controls 14a are provided for positioning the segments 3a arranged in angularly spaced relationship within the outer row of the casing.
  • the controls 14 for the hydraulic cylinders 13 of the segments 3 forming the inner row are connected to the controls 14a for the hydraulic cylinders 13a of the segments 30 in the outer row so that a time differential is provided between the adjustment of the segments in one row as compared to those in the other.
  • FIG. 4 a circuit for operating the controls of the hydraulic cylinders 13, 13a is illustrated. For sake of clarity only three of each type of cylinders is shown in FIG. 4.
  • the hydraulic cylinders 13 are connected in parallel within a control circuit 15 which consists of a hydraulic system.
  • the control 14 for operating the hydraulic cylinders 13 is positioned within the control circuit 15.
  • control 14 receives a control pulse
  • the pressure medium is: fed to the hydraulic cylinders 13 via a pump 16 for selectively displacing the piston rods 12 and adjusting the position of the segments 3 in the inner row of the casing.
  • the hydraulic cylinders 13a are arranged in a similar control circuit 15a, as shown in FIG. 4.
  • the controls 14, 14a are interconnected by means of a time-delay relay 17.
  • the hydraulic cylinders 13 can be actuated first for effecting the inward movements of the segments 3 in the inner row and, after they have been located in the desired position, the hydraulic cylinders 13a can be actuated so that the segments 3a in the outer row are moved into contacting engagement with the segments in the inner row.
  • the control circuits 15, 15a would include safety valves of the type well known in the art.
  • the hydraulic cylinders 13 are operated by the controls 14 from a control console, not shown.
  • the segments 3 are displaced inwardly into the desired position.
  • the segments 3a are displaced inwardly until they contact the segments 3 in the inner row and are positioned as close together as is possible. In this arrangement for moving the segments 3, 3a, the possibility of the impact casing becoming jammed by burden materials is avoided.
  • the impact shell can be movably adjusted without difficulty over, a wide range, and the inclination of the segments can be provided with an angle of 45 or more to the vertical.
  • the length of the segments for a blast furnace having a shaft casing diameter of 11 m it is possible to provide an adjustment range of 1,900 mm.
  • FIG. 3 another embodiment of adjusting apparatus is illustrated comprising a pair of ring-shaped members 19, 19a supported on brackets 18 on the exterior surface of the blast furnace wall.
  • the member 19 is positioned above the push rod 7 while the member 19a is positioned below the push rods.
  • Each of the rings 19, 19a can be rotated about the shaft casing of the furnace by means of one or several hydraulic drives, 20, 20a respectively, which are also mounted on the exterior of the shaft casing in a manner not illustrated. All of the push rods 7 connected to the segments in the inner row are connected to one of the rings 19, 19a and the push rods for the other row of segments are connected to the other one of the members 19, 19a.
  • Linkage arrangements 21, 21a are provided between the rings 19, 19a respectively, and their corresponding push rods for transmitting the rotational movement of the rings to the push rods and, in turn, to the segments in the inner and outer rows.
  • the rings 19, 19a are controlled by an arrangement similar to that shown in FIG. 4, and when one ring is rotated or moved angularly about the furnace, each of the segments connected to its through the push rods is, accordingly, selectively positioned.
  • segments in one row can be positioned relative to those in the other row with a time differential.
  • An adjustable impact casing for use in a shaft furnace, particularly for a blast furnace, said casing having an upright axis and comprising a plurality of angularly spaced apart first arcuate segments forming an inner row about the casing axis, a plurality of angularly spaced apart second segments forming an outer row about the casing axis and disposed contiguous to said inner row, the axis of said first segments and second segments extending in the direction of the casing axis being offset relative to one another and with their lateral edges extending in the direction of the casing axis being arranged in overlapping substantially contacting relationship so that said inner row and outer row of segments form a continuous casing surface, means for supporting said first and second segments, each of said first and second segments being pivotally mounted on said means adjacent the upper end of the segment, a plurality of push rods extending transversely of the casing axis and each said push rod being secured to a different one of said first and second segments, means attached to each said push rod for disp
  • An adjustable impact casing as set forth in claim 1, characterized therein that said push rods being secured to said first and second segments at positions spaced downwardly from the location of the mounting of said segments.
  • An adjustable impact casing as set forth in claim 1, characterized in that said first control device comprises a first control circuit interconnecting each of said means for displacing said push rods secured to said first segments, a first control located in said first control circuit, said second control device comprises a second control circuit interconnecting each of said means for displacing said push rods secured to said second segments, a second control located within said second control circuit, and said means interconnected between said first and second control devices comprises a time-delay relay interconnecting said first control and said second control.
  • An adjustable impact casing as set forth in claim 1, characterized in that said means for displacing said push rods transversely comprising a first ring member located about and outwardly from said casing, a first drive member secured to said first ring member for rotating it about its central axis, first means connected to said first ring member and to said push rods secured to said first segments for transmitting the movement of said first ring member to said first segments for pivotally displacing said first segments, a second ring member located about and outwardly from said casing, a second drive member secured to said first ring member for rotating it about its central axis, second means connected to said second ring member and to said push rods secured to said second segments for transmitting the movement of said second ring member to said second segments for pivotally displacing said second segments.
  • An adjustable impact casing as set forth in claim 1, characterized in that said means for displacing said push rods transversely of the axis of said casing comprising first hydraulic cylinders for said push rods connected to said first segments, second hydraulic cylinders for said push rods connected to said second segments, linkages provided between said first and second hydraulic cylinders and said push rods for transmitting the movement of said hydraulic cylinders to said push rods and in turn for pivoting said first and second segn u u 6.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Blast Furnaces (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
US144978A 1970-05-16 1971-05-17 Adjustable impact casing for a shaft furnace Expired - Lifetime US3693952A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702024190 DE2024190C (de) 1970-05-16 Vorrichtung zum Verstellen eines Schlagpanzers

Publications (1)

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US3693952A true US3693952A (en) 1972-09-26

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US144978A Expired - Lifetime US3693952A (en) 1970-05-16 1971-05-17 Adjustable impact casing for a shaft furnace

Country Status (8)

Country Link
US (1) US3693952A (fr)
JP (1) JPS4825602B1 (fr)
BE (1) BE757896A (fr)
FR (1) FR2092278A5 (fr)
GB (1) GB1320623A (fr)
LU (1) LU61867A1 (fr)
NL (1) NL158551B (fr)
SU (1) SU419044A3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0018652A2 (fr) * 1979-05-02 1980-11-12 Nippon Steel Corporation Dispositif pour changer la répartition de la charge dans un haut-fourneau
CN103003206A (zh) * 2010-07-06 2013-03-27 乌韦·盖布 用于改进熔化过程的方法和装置
CN103090660A (zh) * 2011-11-04 2013-05-08 天地龙控股集团有限公司 竖炉不锈钢防撞段
CN104180642A (zh) * 2013-05-23 2014-12-03 宜兴市新芳铜厂有限公司 竖炉熔铜炉防撞段

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3253823A (en) * 1963-05-28 1966-05-31 Koelsch Foelzer Werke Ag Shaft furnaces

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3253823A (en) * 1963-05-28 1966-05-31 Koelsch Foelzer Werke Ag Shaft furnaces

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0018652A2 (fr) * 1979-05-02 1980-11-12 Nippon Steel Corporation Dispositif pour changer la répartition de la charge dans un haut-fourneau
EP0018652A3 (en) * 1979-05-02 1981-12-23 Nippon Steel Corporation Apparatus for changing the charge distribution in a blast furnace
CN103003206A (zh) * 2010-07-06 2013-03-27 乌韦·盖布 用于改进熔化过程的方法和装置
CN103003206B (zh) * 2010-07-06 2016-05-11 乌韦·盖布 用于改进熔化过程的方法和装置
CN103090660A (zh) * 2011-11-04 2013-05-08 天地龙控股集团有限公司 竖炉不锈钢防撞段
CN103090660B (zh) * 2011-11-04 2015-01-21 天地龙控股集团有限公司 竖炉不锈钢防撞段
CN104180642A (zh) * 2013-05-23 2014-12-03 宜兴市新芳铜厂有限公司 竖炉熔铜炉防撞段

Also Published As

Publication number Publication date
NL7016143A (fr) 1971-11-18
SU419044A3 (fr) 1974-03-05
GB1320623A (en) 1973-06-20
NL158551B (nl) 1978-11-15
JPS4825602B1 (fr) 1973-07-30
FR2092278A5 (fr) 1971-01-21
DE2024190A1 (fr) 1971-08-26
BE757896A (fr) 1971-04-01
LU61867A1 (fr) 1971-05-04

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