US3817504A - Converter hood - Google Patents

Converter hood Download PDF

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Publication number
US3817504A
US3817504A US00327825A US32782573A US3817504A US 3817504 A US3817504 A US 3817504A US 00327825 A US00327825 A US 00327825A US 32782573 A US32782573 A US 32782573A US 3817504 A US3817504 A US 3817504A
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US
United States
Prior art keywords
converter
conduit
cooling
distributing
section
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
US00327825A
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English (en)
Inventor
R Vonnemann
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.)
Hoesch Werke AG
Original Assignee
Hoesch Werke AG
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 DE19722204199 external-priority patent/DE2204199B2/de
Priority claimed from DE19722242123 external-priority patent/DE2242123A1/de
Application filed by Hoesch Werke AG filed Critical Hoesch Werke AG
Application granted granted Critical
Publication of US3817504A publication Critical patent/US3817504A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4646—Cooling arrangements

Definitions

  • the present invention concerns a converter with a converter hood the circumference of which is provided with a plurality of cooling passages for passing cooling water therethrough, the cooling passages being connected through distributing and collecting means to inlet and outlet means respectively which extend through one or both supporting journals of the cover.
  • the heretofore known water cooling system for converter hoods has a number of drawbacks which render the application of this water cooling system questionable. These drawbacks are due primarily to the manner in which the cooling water pipes are arranged on the converter mantle and also due to the water conducting system.
  • the cooling water coils which extend primarily along horizontal planes and also the inlet and 'outlet connections which extend in vertical planes and are partly located above the cooling water coils create ideal conditions for the deposit of liquid slag.
  • knocking ofl pieces of accumulated slag damage to the pipes and conduits can for all practical purposes not be avoided.
  • pieces of the slag which drop out of the chimney onto the converter hood, may cause further damage.
  • a further drawback of the heretofore known water cooling system consists in that the quantity of the cooling water which passes through the cooling pipes cannot be quickly enough adapted to the actual requirements and it is for this reason that always the maximum quantity of cooling water as needed at the highest thermal load has to be fed into the cooling system.
  • FIG. 1 illustrates a side view, partly in section, of a converter hood according to the invention.
  • FIG. 2 is a diagrammatic top view of the converter hood of FIG. 1.
  • FIG. 3 represents a section taken along the line III III of FIG. 1.
  • FIG. 4 is an illustration similar to that of FIG. 3 but with a modified cooling ring associated with the converter hood.
  • FIG. 5 is a fragmentary sectioned view taken along the line V V in FIG. 3.
  • FIG. 6 is a fragmentary sectioned view to show alternative connecting passage-forming means.
  • the converter according to the present invention is characterized primarily in that the circumference of the converter hood is provided with a plurality of cooling passages extending between the lower and the upper edge of the converter hood, the cooling passages being arranged adjacent to each other and in groups. ()ne half of the cooling passages of each group is associated with a plurality of upper and lower distributing and collecting conduit sections which extend along horizontal planes over the circumference of the converter hood, the upper distributing and collecting conduit sections being offset with regard to the lower distributing and collecting conduit sections.
  • One of the lower distributing conduit sections is associated with the inlet for the cooling water and the oppositely located upper collecting conduit section is associated with the outlet for the cooling water.
  • That distributing conduit section into which the cooling water first enters the cooling system is expediently symmetrically arranged with regard to one of the converter supporting journals so that the cooling water passed into the cooling system through the supporting journal will, on the one hand, via the shortest distance flow into the distributing conduits and thereby into the cooling system while, on the other hand, a uniform distribution of the cooling water flow over the front and the rear half of the converter hood is obtained.
  • the cooling water passes through the cooling pipes or passages connected to the distributing conduit in upward direction and flows into the conduit sections which form the upper closure of these cooling passages and which are located in offset arrangement with regard to the distributing conduit while extending along horizontal planes and for the first group of cooling passages form the collecting conduit section and for the subsequent cooling passages form the distributing conduit section.
  • the cooling water then flows off toward the sides and through the next following cooling water passages again flows downwardly.
  • the flow of the cooling water continues with altemating direction of flow through the respectively next lower and upper conduit sections which are located in offset arrangement with regard to each other until the cooling water passes into the last two upper conduit sections which are arranged symmetrical with regard to the second supporting journal.
  • the cooling water flows ofi through the last group of cooling pipes or passages into the collecting conduit section to which is connected the outlet passage for the cooling water, said outlet passage being provided in the second supporting journal.
  • the cooling pipes may at the bottom and at the top lead into the same number of horizontal conduit sections serving as distributing and/or collecting conduit sections. The same flow of the cooling water will also be obtained when the two upper conduit sections which are arranged symmetrically to the distributing conduit sections at the inlet side and when the two upper conduit sections which are arranged symmetrically to the collecting conduit sections at the outlet side are combined to a continuous conduit section.
  • the cooling system according to the present invention is superior to the heretofore known converter hood cooling systems in many ways.
  • the cooling system according to the present invention assures a trouble-free operation of the converter over longer periods of the melting process.
  • the cooling water pipes extending along vertical planes and the distributing and collecting conduits mounted directly on the converter hood do not form a surface which makes it possible for the slag to accumulate in large pieces.
  • several cooling pipes which are located adjacent to each other and through which the cooling water passes in the same direction while conveying the cooling water to one and the same collecting conduit section and the same distributing conduit section, it is possible to shut off any cooling water pipe which might be damaged, for instance, by pieces of slag dropping out of the chimney without materially affecting the cooling effect of the cooling system.
  • conduit sections which extend along horizontal planes and which serve as distributing and/or collecting conduits by welding open profiles, for instance, preferably longitudinally sectioned tubes onto the converter hood.
  • the cooling passages extending between the upper and lower edge of the converter hood are located somewhat closer together toward the mouth of the converter hood with the result that a correspondingly increased cooling is effected in this area.
  • the increasingly effective cooling in the direction toward the mouth of the converter takes care in an ideal way of the increasing heat load occurring in the direction toward the converter mouth.
  • the fact that the distance between the cooling passages increases in the direction toward the lower edge of the converter hood brings about that the space for the tap hole can be created solely by an angling off of the cooling passages leading toward this space and by placing the cooling passages which are in the vicinity of this space closer together. This in turn results in a more intensive cooling in this area as it is needed in view of the higher thermal load.
  • the closure ring at the mouth of the converter hood which closure ring is exposed to particularly high heat stresses has associated therewith an additional cooling ring which is preferably acted upon directly by the cooling water which rises in the first group of cooling pipes and from which the cooling water is then discharged by the last mentioned group of cooling pipes.
  • Changes in temperature of the cooling water passing through this cooling ring are a good indicator for the temperature conditions on the converter.
  • the cooling water which passes through this cooling ring reaches the outlet of this cooling ring in a minimum of time, there is obtained in an advantageous manner the possibility of controlling the throughflow quantity of the cooling water by means of the temperature of the cooling water at the outlet of this cooling ring while taking into consideration the temporary temperature conditions in and at the converter.
  • the fact that the quantity of cooling water can be controlled in conformity with the temporary temperature conditions creates the possibility of a considerable saving in cooling water because it is no longer necessary to feed the coding system continuously with the quantity of cooling water which would correspond to the highest possible thennal stresses.
  • the mantle surface of the converter hood 12 which by means of flanges 111, 121 is connected to the converter vessel 11 has arranged thereon cooling passages 13 which extend in vertical planes. These cooling passages 13 are formed by angle irons welded to the mantle 122. At the lower and at the upper end of the converter hood 12 the cooling passages 13 lead in groups into conduit sections 141 respectively, 161 respectively which extend along horizontal planes and which serve as distributing and collecting conduits, the conduit sections 1411 respectively, 161 respectively consisting of hollow profiles welded to the mantle 122. In this connection the following associations have been made.
  • One half of the cooling passages of each group is associated with a lower distributing or collecting conduit section 141 while the other half of the same group of cooling passages is associated with an upper distributing or collecting conduit section, the upper distributing or collecting conduit section being offset with regard to the lower distributing or collecting conduit section.
  • One of the lower disributing conduit sections namely that distributing conduit section which is arranged symmetrically with regard to the supporting journal of the converter vessel has associated therewith the cooling water inlet 17, whereas the oppositely located collecting conduit section 146 has associated therewith the cooling water outlet 18. In this way a forced guiding for the cooling water is obtained as indicated in FIG. 2 by the respective arrows.
  • the closure ring 123 has associated therewith an additional cooling ring 19, 19' which is short-circuited with two upper conduit sections 161, 165.
  • Reference numerals 21 and 21' represent short circuit lines between the upper annular passage and the designated cooling ring means 19, 19'.
  • Reference numerals 146 and 166 designate the passage section of the lower, respectively the upper annular passage means.
  • the successive conduit sections 141, 142, respectively and 161, 162 respectively designate lines that are interconnected by bores 23 provided in the conduit walls which bores will prevent an overheating of the cooling water in the dead space of the conduit sections which is adjacent to the walls-or partitions 22. If the conduit sections do not abut each other, they are connected by means of connecting passages 23' in FIG. 6.
  • a converter hood especially for use in connection with a converter for refining steel, which includes: an upper set of alternately arranged successive distributing and collecting conduit sections circularly surrounding the upper portion of said hood and being connected thereto, a lower set of successive alternately arranged distributing and collecting conduit sections vertically spaced from said upper set and surrounding the lower portion of said hood while being connected thereto, the distributing and collecting conduit sections of said upper set being respectively circularly offset with regard to the distributing and collecting conduit sections of said lower set, a plurality of conduit means arranged on the outside of said hood and establishing communication between the conduit sections of said lower and said upper set and together therewith forming a cooling fluid circuit for passing cooling fluid therethrough for cooling said hood, said cooling fluid circuit including fluid inlet means for connection with a source of cooling fluid and also including fluid outlet means for releasing heated-up cooling fluid, said conduit means being divided into a plurality of groups of conduit means, some of the conduit means of each group in conveying direction for the cooling fluid to be passed therethrough leading upwardly from a
  • a converter hood according to claim 1 in which one half of each group in each section of the lower set communicates with one but a different section of said upper set.
  • a converter hood according to claim 1 in which the successive distributing and collecting conduit sections of at least one of said sets are short-circuited with regard to said conduit means by bores having a diameter considerably less than the inner diameter of said conduit means.
  • a converter hood according to claim 3 in which only the distributing and collecting conduit sections of said upper set are short-circuited with regard to said conduit means.
  • a converter hood according to claim 1 which includes open profiled members welded to said converter hood and forming said distributing and collecting sections.
  • a converter hood according to claim 1, in which the upper end of the converter hood has a mouth and a closure ring at said mouth, and in which a cooling ring is associated with said closure ring, said cooling ring communicating with said cooling fluid circuit.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
US00327825A 1972-01-29 1973-01-29 Converter hood Expired - Lifetime US3817504A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19722204199 DE2204199B2 (de) 1972-01-29 1972-01-29 Konverter mit Konverterhutkuhlung
DE19722242123 DE2242123A1 (de) 1972-08-26 1972-08-26 Konverter mit konverterhutkuehlung

Publications (1)

Publication Number Publication Date
US3817504A true US3817504A (en) 1974-06-18

Family

ID=25762636

Family Applications (1)

Application Number Title Priority Date Filing Date
US00327825A Expired - Lifetime US3817504A (en) 1972-01-29 1973-01-29 Converter hood

Country Status (8)

Country Link
US (1) US3817504A (enExample)
JP (1) JPS4886710A (enExample)
AT (1) ATA71673A (enExample)
BE (1) BE794500A (enExample)
FR (1) FR2169359B1 (enExample)
GB (1) GB1412494A (enExample)
IT (1) IT974878B (enExample)
LU (1) LU66920A1 (enExample)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963223A (en) * 1973-07-23 1976-06-15 Vereinigte Osterreichische Eisen- Und Stahlwerke-Alpine Montan Aktiengesellschaft Metallurgical vessel, in particular a converter
US3966180A (en) * 1974-09-12 1976-06-29 Vereinigte Osterreichische Eisen- Und Stahlwerke-Alpine Montan Aktiengesellschaft Converter with a converter hood
US4085924A (en) * 1977-07-15 1978-04-25 Pennsylvania Engineering Corporation Cooling assembly for metallurgical vessels

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3588072A (en) * 1967-09-16 1971-06-28 Kawasaki Heavy Ind Ltd Cooling apparatus for a converter body

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3588072A (en) * 1967-09-16 1971-06-28 Kawasaki Heavy Ind Ltd Cooling apparatus for a converter body

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963223A (en) * 1973-07-23 1976-06-15 Vereinigte Osterreichische Eisen- Und Stahlwerke-Alpine Montan Aktiengesellschaft Metallurgical vessel, in particular a converter
US3966180A (en) * 1974-09-12 1976-06-29 Vereinigte Osterreichische Eisen- Und Stahlwerke-Alpine Montan Aktiengesellschaft Converter with a converter hood
US4085924A (en) * 1977-07-15 1978-04-25 Pennsylvania Engineering Corporation Cooling assembly for metallurgical vessels

Also Published As

Publication number Publication date
FR2169359B1 (enExample) 1976-05-14
FR2169359A1 (enExample) 1973-09-07
IT974878B (it) 1974-07-10
JPS4886710A (enExample) 1973-11-15
ATA71673A (de) 1977-09-15
BE794500A (fr) 1973-07-25
GB1412494A (en) 1975-11-05
LU66920A1 (enExample) 1973-03-26

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