US1784699A - Automatic charging of electric furnaces - Google Patents

Automatic charging of electric furnaces Download PDF

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Publication number
US1784699A
US1784699A US348646A US34864629A US1784699A US 1784699 A US1784699 A US 1784699A US 348646 A US348646 A US 348646A US 34864629 A US34864629 A US 34864629A US 1784699 A US1784699 A US 1784699A
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United States
Prior art keywords
furnace
materials
electric furnaces
feed
section
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Expired - Lifetime
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US348646A
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English (en)
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Miguet Paul Louis Joseph
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Individual
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Individual
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Publication of US1784699A publication Critical patent/US1784699A/en
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    • 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
    • F27D11/00—Arrangement of elements for electric heating in or on furnaces
    • F27D11/08—Heating by electric discharge, e.g. arc discharge
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B11/00—Making pig-iron other than in blast furnaces
    • C21B11/10—Making pig-iron other than in blast furnaces in electric furnaces
    • 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

Definitions

  • This invention relates to improvements in. means for automatically charging electric furnaces.
  • first materials are so fed individually into the fusion beds that in the furnace the mass being treated is divided into groups arranged in succession in sections dissimilar in content although juxtaposed like the segments of an orange.
  • carbide of calcium first a section of carbonaceous material and a section of lime, secondly a further section of carbonaceous material and a further section of lime, or for 76% 80% manganese first a section of carbonaceous material and two sections of pyrolusite and a section of carbonaceous material and a section of lime, secondly a further section of'carbonaceous material and two further sections .of pyrolusite and afurther section of carbonaceous material and a further section of lime.
  • the present process substitutes a laterally discontinuous bed containing sections of carbonaceous material, the conductivity of which is constant because none of the material to be reduced is mixed therewith. Instead of a general flow of current through a heterogeneous mixture of varying cnductivity there is a localized current flow'of greater constancy and efliciency.
  • This process affords two advantages, one relating to the carbonaceous material and the other to the material to be reduced. They are of equal importance because they are capable separately or together and according to circumstances of enabling electric furnaces for the treatment of iron to compete with the blast furnace.
  • Fig. 1 is a sectional elevation through the furnace, on the line AA
  • Fig. 2 is a plan, partly in section mid-way up the furnace, through the lines BB and G-C
  • Fig. 3 is a transverse section at 45 of the lower end of a feed hopper, through the line D-D.
  • the feed shaft comprises a chute 26 ending in tube 25 of reduced diameter.
  • the shaft 26 is also formed with a mid division wall 27 extending almost to the oulet.
  • a rotary eccentrically mounted shaft 28 is mounted transversely of the outlet androtated by a handle 29 through 90 in either direction so as to partially choke the feed of oneor other of the rimary materials 30 or 31.
  • Feed screw conveyors 32 are arranged horizontally in the upper portion of the feeding device, each individually driven through reduction gearing 33, by compressed air motor 34 which starts up as soon as. any falling off of the primary materials occurs during the operation of the furnace.
  • FIG. 2 An example of the arrangement of the primary materials in the furnace will now be given. On the left (Fig. 2) are shown two sections of carbonaceous material 37 alternately with two sections of lime 38 and on the right are shown two sections of carbonaceous material 37, two
  • rock minerals, etc. are unavoidable as in the colonial countries for example.
  • the carbonaceous material may be a mixture of coke and anthracite, anthracite and oil, et cetera and the materials for reduction may contain purify ing materials in insufiicient quantities to warrant a whole section without departing from the invention.
  • the feeding. of the primary materials may be by three or four conveyors side by side with eccentrics, screws, valves et cetera, to correspond, without changing the essential characteristics.
  • Apparatus for feeding material to a circular electric furnace comprising a plurality of tubes arrange-i around the periphery, a plurality of feed hoppers mounted one above each tube, a screw conveyor at the base of each hopper to convey the material forward to the tube and a second screw conveyor to feed the material into the hopper.
  • Apparatus for feeding material to a circular electric furnace comprising a plurality of tubes arranged around the periphery, a plurality of feedhoppers mounted one above each tube, ascrew conveyor at the base of each hopper to conveythe material forward to the tube, a rotary eccentric at the outlet of each .tube to retard the flow of material, and a second screw conveyor to feed the material into the hopper.
  • -Apparatus for feeding material to a circular electric furnace comprising a plurality of tubes arranged around the periphery, a plurality of feed hoppers mounted one above each tube, a horizontal screw conveyor at the base of each hopper to convey the material forward to the tube, means at the outlet of each tube to retard the flow of material, and a second horizontal screw conveyor to feed the material into the hopper.
  • Apparatus for charging circular electric furnace comprising aplurality of pipes placed about its periphery, a plurality of charging frames mounted each on a pipe, a
  • Apparatus for charging electric circula'r furnace comprising a plurality of pipes arranged in pairs and placed about the periphery, a plurality of charged frames mounted at the outlet of each series of twin pipes, conveyor screws arranged in pairs at the base of each frame for carrying the mate rial to each series of twin plpes, an eccentric at the common outlet of each pair of pipes for retarding the flow of one of the materials relatively to the other, other series of pipes arranged in pairs for carrying the material into each frame.
  • Apparatus for charging electric circular furnace comprising a plurality of pipes arranged in pairs and placed about its periphery, a plurality of charging frames mounted on each series of twin pipes, screw conveyors arranged in pairs at the base of each frame for carrying the material to each series of pair of pipes, an eccentric at the common outlet of each pair of pipes for retarding the flow of one of the materials relatively to the other, another series of screw conveyors arranged in pairs for conducting the material in each frame and for each screw conveyor, a compressed air motor entering in action as soon as there is produced a storing up of the material.
  • a method of charging a plurality of materials to circular electric furnaces which comprises feeding the diiferent materials separately into non-contiguous radial sectors of the furnace.
  • a method of charging a plurality of materials to circular electric furnaces which comprises feeding carbonaceous materials into a plurality of non-contiguous radial sectors o the furnace, and feeding other raw materials into the intermediate sectors.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
US348646A 1928-12-06 1929-03-20 Automatic charging of electric furnaces Expired - Lifetime US1784699A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR681468T 1928-12-06

Publications (1)

Publication Number Publication Date
US1784699A true US1784699A (en) 1930-12-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
US348646A Expired - Lifetime US1784699A (en) 1928-12-06 1929-03-20 Automatic charging of electric furnaces

Country Status (4)

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US (1) US1784699A (fr)
AT (1) AT128021B (fr)
CH (1) CH147272A (fr)
FR (1) FR681468A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE503570A (fr) * 1959-04-24

Also Published As

Publication number Publication date
AT128021B (de) 1932-05-10
CH147272A (fr) 1931-05-31
FR681468A (fr) 1930-05-15

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