US675281A - Heating and roasting furnace. - Google Patents

Heating and roasting furnace. Download PDF

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US675281A
US675281A US73087999A US1899730879A US675281A US 675281 A US675281 A US 675281A US 73087999 A US73087999 A US 73087999A US 1899730879 A US1899730879 A US 1899730879A US 675281 A US675281 A US 675281A
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shield
furnace
ore
base
roasting
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US73087999A
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Arthur W Johnson
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    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
    • F27B9/243—Endless-strand conveyor

Definitions

  • My invention pertains to furnaces in which ores are heated and roasted. It has for its object the construction and protection of an adjustable track along the sides of the furnace-hearths on which the machinery may be carried for stirring and shifting the ores, said construction being adaptable to but independent of the construction of the furnace.
  • FIG. I is a cross-section of aheating an roasting furnace with my invention located therein.
  • Fig. II represents a slightly -enlarged view of the inner side of the metal rail-chair and shield which form a main part of my invention.
  • Fig. III represents an outer view of the same.
  • Fig. IV is an enlarged section of one side of a roasting-furnace with my invention set in place as designed to be used.
  • Fig. V is a partial side exterior elevation of the furnace, showing the openings for the observation-doors.
  • My invention comprises a continuous hood or overhanging shield A, made of cast-iron or other suitable material and of a form to fit in the sides of the roasting-furnace, as shown in Figs. I and IV. It is constructed in sections, as indicated in Figs. II and III, whose ends fit evenly together and are held in conformity with each other by means of interlocking lugs B B.
  • the overhanging shield is supported by a continuous L-shaped upright and base 0 and D, respectively, all of which is cast with the shield into one piece.
  • the upright part is stiffened by web-braces E E, and the overhanging shield is likewise braced by the web-brace F, placed directly opposite to E.
  • a railchair G On the inner edge of the base D is cast a railchair G, which is designed to support a railroad-rail, and thus provide a track on which a rabble-arm or device for stirring and shifting the heated ores may be carried.
  • a beveled washer K made to fit the flange of the rail, is put on each bolt before the nut is screwed down.
  • the slotshaped bolt-holes are designed with a View to shifting the rail to the right or left, thus making a provision for adjusting the width of the track to fit any variation that may occur in the width of rabble-arm and also to fit any variation in the width of the furnace that is liable to be caused by the heat therein.
  • An opening M is cast in the upright part C. These openings are designed to conform with the openings for the observation-doors along the sides of the furnace and give access to the rail-chairs, as shown at O in Fig. V.
  • My invention has the special advantage of being adaptable to any form of furnace for roasting ores. Its construction in no way enters into nor interferes with the construction of the furnace. It can be placed in position and be removed or repaired in whole or in part without seriously damaging or removing any part of the furnace.
  • the outward-projecting part N of the base extends into the side walls of the furnace and provides a means for holding the shield in its proper position. No bolts or anchors are used in connecting my device with the masonry of the furnace, and any spreading of the furnace-arch or racking of the walls is not liable to spring the shield or track out of position.
  • the overhanging shield A is provided with a projecting flange P, above which the shield is to be covered with a mixture of fire-clay or suitable material to protect it from the The dust arising from stirring the ores and settling on the shield will soon form a protection from the heat should no other material be placed thereon.
  • the space between the hearth and the overhanging shield is partially filled with a thin wall of fire-brick R, leaving a space or slot sufficiently wide for the rabble-arm to pass through.
  • This wall and the overhanging shield protect the track and the machinery run thereon from the furnace heat, and the rabble-arm can be drawn back and forth in the furnace without serious injury to the operating mechanism.
  • My device is applicable to long roastingfurnaces having one hearth or a multiple of hearths placed one above another.
  • Fig. I my device is represented as applied to a two-hearth furnace.
  • the rabblearms are carried on small trucks drawn by chain belts, which pass in one direction through one furnace and around sprocketwheels at the end of the furnace and then back into and through the other furnace.
  • the rabble -blades are set to opposite angles on each alternate arm, which constantly shifts the ores back and forth across the hearth until they are thoroughly roasted.
  • a support for the ore-stirring device consisting of an upright portion having at its lower part an inwardlyextending base and at its upper part an inwardly extending shield deflecting downwardly at its front, the upright, base and shield being one continuous piece in crosssection, and the base having means for attachment of a rail for the ore-stirring device to rest upon, substantially as described.
  • a support for the ore-stirring device consisting of an upright portion having at its lower part an inwardlyextending base and at its upper part an inwardly extending shield deflected downwardly at its front, the upright, base and shield being one continuous piece in crosssection, and a rail-chair formed integrally with the base and being slotted to permit the lateral adjustment of a rail thereon, substantially as described.
  • a support for the ore-stirring device consisting of an upright portion having at its lower part an inwardlyextending base and at its upper part an inwardly extending shield deflected downwardly at its front, the upright, base and shield being one continuous piece in crosssection, and a rail-chair formed integrally with the base, substantially as described.
  • a support for the ore-stirring device consisting of an upright portion having at its lower part an inwardly extending base and rearwardly-extending flange and at its upper part an inwardly-extending shield deflected downwardly at its front, the upright, base and shield being one continuous piece in cross-section, and a rail supported uponsaid base, substantially as described.
  • a support for the ore-stirring device consisting of an upright portion having at its lower part an inwardlyextending base and rearwardly extending flange and at its upper part an inwardly-extending shield, the upright base and shield being one continuous piece in cross-section and the upright portion formed with observation-openings, and a rail-chair formed integrally with the base, substantially as de scribed.
  • the combination with the roasting-hearth, and an ore-stirring device of a support for the ore-stirring device, said support consisting of a number of upright portions each having at its lower part an inwardly-extending base and at its upper part an inwardlyextending shield deflecting downwardly at its front, the upright, base and shield being one continuous piece in cross section, said upright portions being placed end to end to form a practically contin nous wall, and means for the ore-stirring device to rest upon, substantially as described.
  • a support for the ore-stirring device consisting of an upright portion having at its lower part an inwardlyextending base and at its upper part an inwardly extending shield deflecting downwardly at its front, the upright, base and shield being one continuous piece in cross-section, a web-brace projecting from the rear face of the upright portion, a web-brace extending from the under face of the overhanging shield and joining with the inner face of the upright portion, and means for the orestirring device to rest upon, substantially as described.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)

Description

' Patented May 28, mm. A. W. JOHNSON.
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No. 675;28l. Patented May 28, I91.
. A. W. JUHNSDN.
HEATING AND ROASTING FURNACE.
(Application med Sept. 1a, 1999.
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THE Nonms PETERS (10.. mm'uurua, wAsI-cmu'rou. n, c
UNITED STATES PATENT OFFICE.
ARTHUR W. JOHNSON, OF TACOMA, WASHINGTON.
HEATING AND ROASTING FURNACE.
SPECIFICATION formingpart of Letters Patent No. 675,281, dated May 28, 1901.
Application filed September 18, 1899. Serial No. 730,879. (No model.)
T on whom it may concern.-
Be it known that I, ARTHUR W. JOHNSON, a citizen of the United States, residing at Tacoma, in the county of Pierce and State of Washington, have invented certain new and useful Improvements in Heating and Roasting Furnaces,of which the followin gis aspecification.
My invention pertains to furnaces in which ores are heated and roasted. It has for its object the construction and protection of an adjustable track along the sides of the furnace-hearths on which the machinery may be carried for stirring and shifting the ores, said construction being adaptable to but independent of the construction of the furnace.
My invention consists of certain details of construction hereinafter described and as illustrated in the accompanying drawings, in which Figure I is a cross-section of aheating an roasting furnace with my invention located therein. Fig. II represents a slightly -enlarged view of the inner side of the metal rail-chair and shield which form a main part of my invention. Fig. III represents an outer view of the same. Fig. IV is an enlarged section of one side of a roasting-furnace with my invention set in place as designed to be used. Fig. V is a partial side exterior elevation of the furnace, showing the openings for the observation-doors.
Similar letters refer to similar parts in the several views.
My invention comprises a continuous hood or overhanging shield A, made of cast-iron or other suitable material and of a form to fit in the sides of the roasting-furnace, as shown in Figs. I and IV. It is constructed in sections, as indicated in Figs. II and III, whose ends fit evenly together and are held in conformity with each other by means of interlocking lugs B B. The overhanging shield is supported by a continuous L-shaped upright and base 0 and D, respectively, all of which is cast with the shield into one piece. The upright part is stiffened by web-braces E E, and the overhanging shield is likewise braced by the web-brace F, placed directly opposite to E.
furnace heat.
On the inner edge of the base D is cast a railchair G, which is designed to support a railroad-rail, and thus provide a track on which a rabble-arm or device for stirring and shifting the heated ores may be carried. The
rail-chair is provided with bolt-slots H,
through which the rails L are securely bolted to the chair. A beveled washer K, made to fit the flange of the rail, is put on each bolt before the nut is screwed down. The slotshaped bolt-holes are designed with a View to shifting the rail to the right or left, thus making a provision for adjusting the width of the track to fit any variation that may occur in the width of rabble-arm and also to fit any variation in the width of the furnace that is liable to be caused by the heat therein. An opening M is cast in the upright part C. These openings are designed to conform with the openings for the observation-doors along the sides of the furnace and give access to the rail-chairs, as shown at O in Fig. V.
My invention has the special advantage of being adaptable to any form of furnace for roasting ores. Its construction in no way enters into nor interferes with the construction of the furnace. It can be placed in position and be removed or repaired in whole or in part without seriously damaging or removing any part of the furnace.
The outward-projecting part N of the base extends into the side walls of the furnace and provides a means for holding the shield in its proper position. No bolts or anchors are used in connecting my device with the masonry of the furnace, and any spreading of the furnace-arch or racking of the walls is not liable to spring the shield or track out of position.
The overhanging shield A is provided with a projecting flange P, above which the shield is to be covered with a mixture of fire-clay or suitable material to protect it from the The dust arising from stirring the ores and settling on the shield will soon form a protection from the heat should no other material be placed thereon.
The space between the hearth and the overhanging shield is partially filled with a thin wall of fire-brick R, leaving a space or slot sufficiently wide for the rabble-arm to pass through. This wall and the overhanging shield protect the track and the machinery run thereon from the furnace heat, and the rabble-arm can be drawn back and forth in the furnace without serious injury to the operating mechanism.
My device is applicable to long roastingfurnaces having one hearth or a multiple of hearths placed one above another.
In Fig. I my device is represented as applied to a two-hearth furnace. The rabblearms are carried on small trucks drawn by chain belts, which pass in one direction through one furnace and around sprocketwheels at the end of the furnace and then back into and through the other furnace. The rabble -blades are set to opposite angles on each alternate arm, which constantly shifts the ores back and forth across the hearth until they are thoroughly roasted.
Having described my invention, what I claim as new and useful, and desire to secure by Letters Patent, is
1. In an ore-roasting furnace,- the combination with the roasting'hearth, and an ore-stirring device, of a support for the ore-stirring device, said support consisting of an upright portion having at its lower part an inwardlyextending base and at its upper part an inwardly extending shield deflecting downwardly at its front, the upright, base and shield being one continuous piece in crosssection, and the base having means for attachment of a rail for the ore-stirring device to rest upon, substantially as described.
2. In an ore-roasting furnace, the combination with the roasting-hearth and an ore-stirring device, of a support for the ore-stirring device, said support consisting of an upright portion having at its lower part an inwardlyextending base and at its upper part an inwardly extending shield deflected downwardly at its front, the upright, base and shield being one continuous piece in crosssection, and a rail-chair formed integrally with the base and being slotted to permit the lateral adjustment of a rail thereon, substantially as described.
3. In an ore-roasting furnace, the combination with the roasting-hearth, and an ore-stirring device, of a support for the ore-stirring device, said support consisting of an upright portion having at its lower part an inwardlyextending base and at its upper part an inwardly extending shield deflected downwardly at its front, the upright, base and shield being one continuous piece in crosssection, and a rail-chair formed integrally with the base, substantially as described.
4:. In an ore-roasting furnace, the combination with the roasting-hearth, and an ore-stirring device, of a support for the ore-stirring device, said support consisting of an upright portion having at its lower part an inwardly extending base and at its upper part an inwardly extending shield deflected downwardly at its front, the upright, base and shield being one continuous piece in crosssection, and the upright portion having observation-openings formed therein, substantially as described.
5. In an ore-roasting furnace, the combination with the roasting-h earth, and an ore-stirring device, of a support for the ore-stirring device, said support consisting of an upright portion having at its lower part an inwardly extending base and rearwardly-extending flange and at its upper part an inwardly-extending shield deflected downwardly at its front, the upright, base and shield being one continuous piece in cross-section, and a rail supported uponsaid base, substantially as described.
6. In an ore-roasting furnace, the combination with the roasting-hearth, and an ore-stir ring device, of a support for the ore-stirring device, said support consisting of an upright portion having at its lower part an inwardlyextending base and rearwardly extending flange and at its upper part an inwardly-extending shield, the upright base and shield being one continuous piece in cross-section and the upright portion formed with observation-openings, and a rail-chair formed integrally with the base, substantially as de scribed.
7. In an ore-roasting furnace, the combination with the roasting-hearth, and an ore-stirring device, of a support for the ore-stirring device, said support consisting of a number of upright portions each having at its lower part an inwardly-extending base and at its upper part an inwardlyextending shield deflecting downwardly at its front, the upright, base and shield being one continuous piece in cross section, said upright portions being placed end to end to form a practically contin nous wall, and means for the ore-stirring device to rest upon, substantially as described.
8. In an ore-roastin g furnace, the combination with the roasting-hearth, and an ore-stirring device, of a support for the ore-stirring device, said support consisting of an upright portion having at its lower part an inwardlyextending base and at its upper part an inwardly extending shield deflecting downwardly at its front, the upright, base and shield being one continuous piece in cross-section, a web-brace projecting from the rear face of the upright portion, a web-brace extending from the under face of the overhanging shield and joining with the inner face of the upright portion, and means for the orestirring device to rest upon, substantially as described.
9. In an ore-roasting furnace, a continuous L-shaped lining along the sides thereof cast in sections, whose ends are joined with interlocking lugs, an overhanging shield extend- In testimony whereof I aifix my signature ing from the top of said lining, a continuous in the presence of two witnesses. flange near the edge of said shield, the lining and shield having Web-braces at suitable in- ARTHUR JOHNSON 5 tervals and the base provided with rail-chairs, Witnesses and means for adj ustably bolting a rail there- W. R. RU ST,
to, substantially as described and shown. E. S. LEMMEi
US73087999A 1899-09-18 1899-09-18 Heating and roasting furnace. Expired - Lifetime US675281A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4780040A (en) * 1987-12-11 1988-10-25 Research, Incorporated Conveyor guide arrangement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4780040A (en) * 1987-12-11 1988-10-25 Research, Incorporated Conveyor guide arrangement
WO1989005272A1 (en) * 1987-12-11 1989-06-15 Research, Incorporated Conveyor guide arrangement

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