US3857554A - Steel conversion - Google Patents

Steel conversion Download PDF

Info

Publication number
US3857554A
US3857554A US00328110A US32811073A US3857554A US 3857554 A US3857554 A US 3857554A US 00328110 A US00328110 A US 00328110A US 32811073 A US32811073 A US 32811073A US 3857554 A US3857554 A US 3857554A
Authority
US
United States
Prior art keywords
flexible
weighing
converter
outlet
conveying
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
US00328110A
Other languages
English (en)
Inventor
F Eichinger
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.)
Claudius Peters AG
Original Assignee
Claudius Peters 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
Application filed by Claudius Peters AG filed Critical Claudius Peters AG
Priority to US00328110A priority Critical patent/US3857554A/en
Priority to DE2403942A priority patent/DE2403942C3/de
Priority to JP49012681A priority patent/JPS49106406A/ja
Application granted granted Critical
Publication of US3857554A publication Critical patent/US3857554A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • F27D3/18—Charging particulate material using a fluid carrier
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/001—Injecting additional fuel or reducing agents
    • C21B5/003—Injection of pulverulent coal
    • 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
    • C21C5/34—Blowing through the bath
    • 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
    • C21C5/48—Bottoms or tuyéres of converters
    • 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
    • F27D3/10—Charging directly from hoppers or shoots

Definitions

  • Dreyer v A steel converter having bottom tuyeres supplied from [52] U.S. Cl. 266/34 T, 285/300, 285/301, a plurality of solids weighing tanks which discharge 302/29 selectively under pressure into a single conduit serving gl 'ld 'f' the tuyers.
  • the weighing tanks are isolated from the 0 earc 1 1 1 conduit by individual flex-joints which permit relative 266/41; 285/299, 300, 301; 302/3, 27, 2 motion between their ends, without detrimental 531 64 stresses as a result of pressure-changes, while maintaining aeration of the material passing through the [56] References Cited flex joint UNITED STATES PATENTS 239,621 4/1881 P116111 266/35 4 6 Drawmg guns I! I2 I3 4 5 6 4a 6a 2. 50 i2.
  • the present invention relates to the supply of loose, solid material from plural zones to a single service zone and is more particularly concerned with the weighing and pressure-injection of different solids into the bottom of steel converters.
  • the present invention provides a weighing and pressure-conveying system for plural materials for delivery to a common point at a pressure above atmospheric pressure.
  • the system of the invention is of unique advantage in the supply of measured quantities of different loose solids into the bottom of steel-converters below the surface of the molten metal therein.
  • the present invention includes a new flex-joint for conveying loose solids between relatively moveable points without detrimental effects from pressurechanges within the systems and without loss of flowability of the material as it passes through the flex-joint.
  • FIG. 1 is a schematic elevation of a system according to the invention
  • FIG. 2 is a plan view of the system of FIG. 1;
  • FIG. 3 is a semi-schematic side view of a flex-joint of FIG. 1 on an enlarged scale;
  • FIG. 4 is a plan view of the flex-joint of FIG. 3;
  • FIG. 5 is a sectional view of the preferred form of flex-joint of the invention.
  • FIG. 6 is a plan view, on a reduced scale, of the flexjoint of FIG. 5.
  • the preferred form of system of the invention includes a plurality of weighing tanks 1, 2 and 3 arranged to receive loose, solid material from separate hoppers 11, 12 and 13, respectively. Selective delivery of material from the hoppers l1 13 is accomplished via conventional flex-joints 4, 5 and 6 having valves 4a, 5a and 6a, respectively.
  • the weigh tanks 1, 2 and 3 each are mounted on weighing means such as sets of load cells 1L, 2L and 3L, respectively.
  • the tanks 1, 2, and 3 each discharge through novel flex-joints 21, 22 and 23 to an otherwise conventional blowtank 24.
  • valves 21a, 22a and 23a are regulated by a suitable control system (not 2 shown) which is responsive to appropriate signals from the load cells 1L through 3L.
  • blowtank 24 is the means for supplying predetermined quantities of different loose solids to a bottom-blown steel converter (not shown) via its discharge 25 leading to the submerged tuyeres of the converter.
  • Carrier gas under pressure from a conventional source (not shown), is supplied to the blowtank 24 and via a pressurizing inlet 26 to a conveying outlet 27.
  • FIGS. 3 and 4 which detail, for simplicity, only one of the flex-joints of my invention each of which includes a sloped inlet section 14 leading angularly from the weigh tank 3 and meeting a substantially horizontal section 15 which, in turn, joins a sloped outlet-section 16 leading to the blow tank 24.
  • the horizontal section 15 is formed with an intermediate bellows section 17 which is joined to the rigid sections 15R and 15L by suitable clamping means (not shown).
  • the flex-joint includes an aerating deck 18 affixed to the inlet 14 and to horizontal section 15R, terminating closely adjacent the outlet section 16. With air or gas supplied under suitable pressure beneath the porous aerating deck 18, material entering on its upper surface is aerated and thus aided in its advance to the outlet section 16.
  • the aerating deck 18 is constructed to be free of this sections 15L and 16, to permit free motion of the sections 15R and 15L without interference from the aerating deck.
  • tie rods 19, 19 which are provided between the rigid, horizontal sections 15R and 15L of each of the flex-joints 21, 22 and 23, respectively.
  • Each of the tie rods 19, 19 is provided with a universal or Cardan coupling 20 and 20 respectively, which permits angular displacement around or transverse to the tie rod, but absolutely prevents longitudinal motion between the components 15R and 15L of the flex-joints 21 23, regardless of the presence or intensity of pressure within the joint.
  • the control system closes valve 23a in the outlet of weigh-tank 3, and then opens the fill valve 6a from the hopper 13 to fill that weigh tank 3.
  • the load cells 3L cause a further control cycle to close'the intake valve 6a.
  • valve 230 is opened to pass the material therein to the blowtank 24, (the valves 21a and 220 being closed). Pressure is supplied to the blowtank 24 and line 26, to force the material into the discharge 25 and the outlet 27 to the converter.
  • weighed quantities of different materials may then be discharged from the weigh tanks 1 m2 (or once again from tank 3) according to the desired program.
  • the tie rods 19 anduniversal joints 20 of the flex-joints 21 23 prevent the intermittent, high pressure supplied to their interior from the blow tank 24 from affecting the weighing of the associated tanks 1 3. Since the horizontal sections 15R and 15L cannot move either away from each other or toward each other, because of the tie rods 19, but are free to move up and down laterally with the motion of the associated weigh tank, there is, essentially, no chance of interference with the accuracy of the weighing operations.
  • FIGS. 5 and 6 A particularly effective form of flex-joint of my invention is shown in FIGS. 5 and 6.
  • the flex-joint includes an inlet 34 and outlet 36 and a generally horizontal section 35 including rigid sections 35R and 35L joined by a flexible duct 37.
  • the flexible duct is secured to the sections 35R and 35L by suitable clamps 33R and 33L, respectively.
  • the section 35R is formed as an upwardly and laterally opening Tee comprising an upward inlet and a branch 31, with a branch 32 joining the flexible duct 37.
  • the section 35L is formed as a downward and laterally-opening Tee comprising a downward outlet and a branch 41, with a branch 42 joining the flexible duct 37.
  • the section 35R is closed, at branch 31, by an end plate 31a which is removeably secured thereto such as by the bolts shown.
  • the end plate 31a carries a U- shaped channel or plenum chamber 39 thereon which extends through the branch 32, the flexible duct 37 and branch 42 and terminates adjacent the outlet 40.
  • the plenum chamber 39 may have additional rest points such as a shelf 39a on the inner wall of the branch 32.
  • the plenum chamber 39 is closed at its upper surface by a suitable aerating deck 38 and receives aerating or fluidizing gas via a gas inlet 39b in the end plate 31a.
  • the aerating deck carries lateral, material-confining flanges 38a along its edges.
  • the branch 32 Adjacent its juncture with the flexible duct 37, the branch 32 carries a tapering sleeve 43 which surrounds the plenum chamber 39, aerating deck 38 and flanges 38a.
  • the sleeve 43 extends at least across the gap between the branches 32 and 42, within the flexible duct 37, and prevents spillage of material into the folds or bellows of the flexible duct 37.
  • the section 35L is closed, at its branch 41, by an end plate 41a which is removablely secured thereto, such as by the bolts shown, for servicing.
  • the end plate 41a has a tubular sleeve 44 thereon which carries an impact plate 45 which is mounted thereon by means of slots 46 which receive fingers or tabs 47 on the plate 45.
  • the plate 45 closely fits against the interior of the branch 41 to close off that area to material flow.
  • the entire assembly of the flex-joint of FIGS. 4 and 6 is longitudinally tied by means of a pair of tie rods 49, 49 which engage the inlet and outlet sections, 35R and 35L, respectively, by means of appropriate pairs of universal joints 50, 50'.
  • a steel-converter system including a converter vessel having tuyers for the introduction of gases and loose-solid matter below the level of the molten metal in the converter by weighing and pressure-conveying said loose solids through the bottom of said converter, the improvement comprising:
  • cycling means for cycling the filling and emptying said weighing tanks
  • said cycling means including a valve at the inlet of each weighing tank and f. a valve at the outlet of each weighing tank,
  • a flexible outlet joint associated with the outlet of each weighing tank, said flexible outlet joint including i. a flexible duct section arranged at an angle closely approaching the horizontal,
  • k means for stabilizing each flexible outlet joint against changes in longitudinal dimension under changes of internal pressure.
  • a steel-converter system according to claim 1 in which said stabilizing means includes tie bars secured to spaced members of said flexible outlet joint on opposite ends of said flexible ducts by means of universal joints.
  • a steel'converter system according to claim 1 in which said conveying means includes aerating means in said flexible outlet joint for conveying solids therein from the inlet to the outlet thereof.
  • a steel converter system in which said aerating means is mounted on a removeable wall portion of said flexible outlet joint.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
US00328110A 1973-01-30 1973-01-30 Steel conversion Expired - Lifetime US3857554A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US00328110A US3857554A (en) 1973-01-30 1973-01-30 Steel conversion
DE2403942A DE2403942C3 (de) 1973-01-30 1974-01-28 Vorrichtung zur Zuführung von dosierten Mengen verschiedener loser Feststoffe zu den Düsen eines bodenblasenden Konverters
JP49012681A JPS49106406A (enrdf_load_stackoverflow) 1973-01-30 1974-01-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00328110A US3857554A (en) 1973-01-30 1973-01-30 Steel conversion

Publications (1)

Publication Number Publication Date
US3857554A true US3857554A (en) 1974-12-31

Family

ID=23279563

Family Applications (1)

Application Number Title Priority Date Filing Date
US00328110A Expired - Lifetime US3857554A (en) 1973-01-30 1973-01-30 Steel conversion

Country Status (3)

Country Link
US (1) US3857554A (enrdf_load_stackoverflow)
JP (1) JPS49106406A (enrdf_load_stackoverflow)
DE (1) DE2403942C3 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110144430A (zh) * 2019-06-04 2019-08-20 甘肃酒钢集团宏兴钢铁股份有限公司 一种提高底吹喷粉工艺下冶炼前期温度的方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI66202C (fi) * 1981-11-17 1984-09-10 Outokumpu Oy Foerfarande och anordning foer att pneumatiskt mata tillsatsmaterialier till konvertrar

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US239621A (en) * 1881-04-05 Bduaed pieath and emil pieath
US2335478A (en) * 1940-10-17 1943-11-30 Universal Oil Prod Co Expansion joint
US3311418A (en) * 1964-07-24 1967-03-28 Systems Engineering And Mfg Co Handling of pulverulent materials
US3323905A (en) * 1963-09-23 1967-06-06 Oesterr Alpine Montan Method and apparatus for adding agents for forming and/or treating the slag in iron baths
US3632173A (en) * 1969-10-21 1972-01-04 Consolidated Engineering Co Pneumatic conveying apparatus automatically operable successively for weight responsive filling, and for activation, discharging, purging, against back pressure, and venting

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US239621A (en) * 1881-04-05 Bduaed pieath and emil pieath
US2335478A (en) * 1940-10-17 1943-11-30 Universal Oil Prod Co Expansion joint
US3323905A (en) * 1963-09-23 1967-06-06 Oesterr Alpine Montan Method and apparatus for adding agents for forming and/or treating the slag in iron baths
US3311418A (en) * 1964-07-24 1967-03-28 Systems Engineering And Mfg Co Handling of pulverulent materials
US3632173A (en) * 1969-10-21 1972-01-04 Consolidated Engineering Co Pneumatic conveying apparatus automatically operable successively for weight responsive filling, and for activation, discharging, purging, against back pressure, and venting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110144430A (zh) * 2019-06-04 2019-08-20 甘肃酒钢集团宏兴钢铁股份有限公司 一种提高底吹喷粉工艺下冶炼前期温度的方法

Also Published As

Publication number Publication date
DE2403942B2 (de) 1977-11-17
DE2403942A1 (de) 1974-08-08
JPS49106406A (enrdf_load_stackoverflow) 1974-10-09
DE2403942C3 (de) 1978-06-29

Similar Documents

Publication Publication Date Title
RU2054047C1 (ru) Способ дозированного ввода мелкозернистых твердых веществ в промышленную печь и устройство для его осуществления
US4883390A (en) Method and apparatus for effecting pneumatic conveyance of particulate solids
US5018648A (en) Cylinder discharge
EP0248830A1 (en) CONVEYOR CONTAINERS FOR THE TRANSPORT OF BULK GOODS.
US4027920A (en) Distributor
US3239278A (en) Apparatus for injecting bulk solids into a vessel
US4820052A (en) Air distribution head
DE69017928D1 (de) Verfahren zum pneumatischen und dosierten Einblasen feinkörniger Feststoffe in einen unter veränderlichem Druck stehenden Behälter.
US3857554A (en) Steel conversion
FI105828B (fi) Laitteisto suspensiosulatusuunin rikastepolttimen jauhemaisen materiaalin syötön tasaamiseksi
US4735241A (en) Bag-filling machine
US4322197A (en) Process and installation for charging a shaft furnace
US3004799A (en) Method and device for conveying dry powdered material through a conduit
EP0750946A2 (en) A two-components pressure feed system
US4412748A (en) Gravity circulation mixer
US4406443A (en) Apparatus for distributing gas-laden refining powdered-particles into molten metal
US3311418A (en) Handling of pulverulent materials
US4671030A (en) Bulk silo with aerated mixing or homogenizing chamber
US4676826A (en) Method and apparatus for pneumatic feeding or additives into converters
US3316023A (en) Sparger type covered hopper car
US6176276B1 (en) Granular material feeding device
US4568224A (en) Fluidizing outlet assembly including internal trough
CN215325724U (zh) 混合机定量缓冲仓
US4971482A (en) Pneumatic system and method for conveying of sand
SU781162A1 (ru) Подъемник дл сыпучих материалов