US3854635A - Sliding car arrangement for a shaft furnace - Google Patents

Sliding car arrangement for a shaft furnace Download PDF

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Publication number
US3854635A
US3854635A US00424706A US42470673A US3854635A US 3854635 A US3854635 A US 3854635A US 00424706 A US00424706 A US 00424706A US 42470673 A US42470673 A US 42470673A US 3854635 A US3854635 A US 3854635A
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US
United States
Prior art keywords
shaft
sliding
cars
outwardly
discharge arrangement
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.)
Expired - Lifetime
Application number
US00424706A
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English (en)
Inventor
F Tschinkel
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.)
Maerz Ofenbau AG
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Maerz Ofenbau AG
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Filing date
Publication date
Application filed by Maerz Ofenbau AG filed Critical Maerz Ofenbau AG
Application granted granted Critical
Publication of US3854635A publication Critical patent/US3854635A/en
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Expired - Lifetime 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
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/21—Arrangements of devices for discharging
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/02—Roasting processes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating

Definitions

  • the characteristic feature of shaft furnaces is the movement of the material from the top to the bottom. If the shaft furnace is used for smelting, the material flows off from the bottom of the furnace. However, if the material being treated in the furnace is solid rather than liquid when it reaches the lower end of the furnace, a suitable device for discharging the material must be used, for example, in shaft lime kilns. There have been a number of different discharging devices used for such furnaces.
  • a socalled sliding table is used as the discharging device.
  • a plate is arranged, mounted on rollers or wheels, and is pushed or moved back and forth for discharging the material from the shaft.
  • the material With each movement of the sliding table, the material is discharged from one of the two opposite sides of the table, and the column of material in the shaft sinks slowly toward the lower end.
  • the material descends practically vertically to a plane just-above the sliding table and then it changes its direction of movement toward the discharge outlet immediately above the sliding table. Because of this pattern of movement of the material downwardly through the shaft and out of its lower end, the grains or particles of the materialpassing downwardly through the center of the shaft cover a substantially longerhorizontal path than do the particles located adjacent the shaft walls.
  • the lower portion of a shaft furnace is used for an after-treatment of the material, for example, the burnt lime in a lime kiln is cooled in the lower zone of the shaft by air passing in counterflow.
  • the cooling conditions vary over the horizontal cross section of the shaft or kiln.
  • the discharge takes place over the entire circumferential periphery of the shaft rather than on just two opposite sides.
  • at least three sliding cars are provided below the shaft and the surfaces of the cars extend over the entire cross sectional area of the lower end of the shaft.
  • FIG. 1 is a schematic side view of a known discharge arrangement for a shaft furnace
  • FIG. 2 is a plan view of the arrangement shown in FIG. 1;
  • FIG. 3 is a schematic plan view of a discharge arrangement for a shaft furnace embodying the present invention.
  • FIG. 4 is a view, similar to FIG. 3, of a portion of the structure of the discharge arrangement shown in FIG.
  • FIG. 5 is a schematic representation, similar to FIG. 4, illustrating a portion of the discharge arrangement where the shaft furnace is circular in cross section;
  • FIG. 6 is a schematic representation of the difference in which the flow of material from the shaft fumace is influenced by the prior art arrangement of FIG. 1 and by the discharge arrangement embodying the present invention.
  • the downward path of the material through the shaft furnace l is indicated by crosses for the grains or particles 4 of the material passing downwardly along the walls of the shaft and by rings for the particles 5 of the material descending centrally through the shaft.
  • the particles 5 cover a substantially longer path in reaching the outlet than the particles 4 with the result that there is a difference in the downward movement of the particles across the cross section of the shaft which has an unfavorable effect on any after-treatment of the material at the outlet from the shaft.
  • the material is discharged in a uniform manner about the entire circumferential peripheryof the lower end-of the shaft furnace.
  • four sliding cars 6, 7, 8 and 9 are arranged under the shaft I furnace 10 and each of the cars can be moved relative the sectors conforming to the circular shape of the shaft.
  • the sliding cars in FIG. 3 and FIG. 5 for their surfaces located under the shaft furnace when they are in a fully inward position, have a sector-like configuration with two rectilinear sides diverging outwardly towards the circumference of the furnace and terminating in a rectilinear side in FIG. 3 and in a curvilinear side in FIG. 5.
  • gaps l8 and 19 located between the juxtaposed inner edges of the sliding cars which are covered by roof-shaped or saddled-shaped members 20, note FIG. 3, to prevent the material from falling downwardly through the gaps as the sliding cars are moved outwardly from the center of the shaft.
  • the members 20 are dimensioned to afford an adequate cover over the gap during the inward and outward movement of the sliding cars.
  • the shaft furnace has a rectangular cross section, it is advisable to limit the rectilinear sides of the sliding cars by the diagonals of the shaft cross section.
  • the number of the sliding cars can be varied, particularly if the furnace shaft has a circular cross section and the number can be adapted to different requirements.
  • two oppositely disposed sliding cars are'provided with a common drive, for example, a thrust pistons drive, with the two cars moving back and forth', like the sliding table in the known design, along a rectilinear path.
  • a common drive for example, a thrust pistons drive
  • a discharge arrangement for a vertically extending shaft furnace having a discharge outlet at its lower end and used for the treatment of bulk material comprising at least three sliding cars located below the lower end ,of the shaft and movable in a horizontal plane outwardly and inwardly relative to the central axis of the shaft, the discharge outlet from the shaft extending for the entire circumferential periphery of the lower end of the shaft, wherein the improvement comprises that the surfaces of said sliding cars supporting the material within the shaft furnace combine to extend under the full horizontal cross sectional area of the lower end of the shaft for supporting its contents and each said sliding car is movable outwardly from the center of the shaft along a rectilinear path different from the path of the other said sliding cars.
  • a discharge arrangement as set forth in claim 1, wherein the width of each sliding car decreases inwardly from the circumferential periphery of said shaft to its central axis.
  • a discharge arrangement as set forth in claim 1, wherein said sliding cars can be moved simultaneously outwardly and simultaneously inwardly.
  • a discharge arrangement as setforth in claim 1, wherein stationary cover members are located within the lower end of the shaft over the juxtaposed edges of said sliding cars and said cover members extend over the adjacent surfaces of said sliding cars so that, as said sliding cars are moved outwardly, said cover members prevent the material within the shaft from dropping between the juxtaposed edges of the cars.
  • A- discharge arrangement as set forth in claim 2, wherein the surface of said sliding cars under the lower end of said shaft each have a sector-like configuration and, when said sliding cars are in a fully inwardly displaced position, each car hastwo rectilinear sides diverging from a common point located centrally within the shaft furnaces outwardly to the circumferential periphery of the shaft.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Metallurgy (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Manufacture Of Iron (AREA)
  • Tunnel Furnaces (AREA)
US00424706A 1972-12-18 1973-12-14 Sliding car arrangement for a shaft furnace Expired - Lifetime US3854635A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT1076072A AT323630B (de) 1972-12-18 1972-12-18 Austragvorrichtung für schachtöfen

Publications (1)

Publication Number Publication Date
US3854635A true US3854635A (en) 1974-12-17

Family

ID=3624510

Family Applications (1)

Application Number Title Priority Date Filing Date
US00424706A Expired - Lifetime US3854635A (en) 1972-12-18 1973-12-14 Sliding car arrangement for a shaft furnace

Country Status (10)

Country Link
US (1) US3854635A (de)
JP (1) JPS5121926B2 (de)
AT (1) AT323630B (de)
CS (1) CS168466B2 (de)
DE (2) DE7340505U (de)
ES (1) ES421031A1 (de)
FR (1) FR2211113A5 (de)
GB (1) GB1445353A (de)
IT (1) IT997812B (de)
RO (1) RO64340A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090101629A1 (en) * 2007-10-19 2009-04-23 Honeywell International, Inc. Erosion resistant torch
US20090223939A1 (en) * 2007-10-19 2009-09-10 Honeywell International, Inc. Variable orifice torch

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58148266U (ja) * 1982-03-31 1983-10-05 日野自動車株式会社 列型燃料噴射ポンプ

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2153030A (en) * 1937-08-27 1939-04-04 Blaw Knox Co Device for feeding material
US3568894A (en) * 1969-01-21 1971-03-09 Harper Inc Allen Means to meter granular or particulate material

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2153030A (en) * 1937-08-27 1939-04-04 Blaw Knox Co Device for feeding material
US3568894A (en) * 1969-01-21 1971-03-09 Harper Inc Allen Means to meter granular or particulate material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090101629A1 (en) * 2007-10-19 2009-04-23 Honeywell International, Inc. Erosion resistant torch
US20090223939A1 (en) * 2007-10-19 2009-09-10 Honeywell International, Inc. Variable orifice torch
US7842898B2 (en) 2007-10-19 2010-11-30 Honeywell International Inc. Variable orifice torch
US7977599B2 (en) 2007-10-19 2011-07-12 Honeywell International Inc. Erosion resistant torch

Also Published As

Publication number Publication date
IT997812B (it) 1975-12-30
JPS5121926B2 (de) 1976-07-06
JPS4990606A (de) 1974-08-29
FR2211113A5 (de) 1974-07-12
AT323630B (de) 1975-07-25
CS168466B2 (de) 1976-06-29
DE2356554A1 (de) 1974-06-20
ES421031A1 (es) 1976-04-01
GB1445353A (en) 1976-08-11
RO64340A (fr) 1979-03-15
DE7340505U (de) 1976-06-24

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