US2624475A - Method and apparatus for feeding glass furnaces - Google Patents

Method and apparatus for feeding glass furnaces Download PDF

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Publication number
US2624475A
US2624475A US108554A US10855449A US2624475A US 2624475 A US2624475 A US 2624475A US 108554 A US108554 A US 108554A US 10855449 A US10855449 A US 10855449A US 2624475 A US2624475 A US 2624475A
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United States
Prior art keywords
sheet
batch
furnace
feeding
glass
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Expired - Lifetime
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US108554A
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English (en)
Inventor
Henry Georges Leon
Brichard Edgard
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Union des Verreries Mecaniques Belges SA
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Union des Verreries Mecaniques Belges SA
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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B3/00—Charging the melting furnaces

Definitions

  • An object of .thisinvention is to make it'possi- .ble to vary the direction .of the said sheet of batch, either in order to correctdeviations due to .accidental causes. or in order tobring thesheet at each instant to that point ofthe furnace at which the melting conditions are. the best.
  • the present invention relates to a method and .apparatus by means of which it is possible to guide the sheet of batch in its progressat will.
  • theprogress of the sheet isretarded over all or part of its length when, after having been distributed over the bath, the sheet advances under the action of the feeding arrangement.
  • This retarding action is exerted :by 40118 or .more elements penetrating. more orless deeply into the sheet, at the.necessaryapointsfor imparting the required direction thereto.
  • jIt .is-xthus possible to act on the sheet of batch in: proximity to the feeding arrangement before it hasbeen subjected to the action of theflames and" thus to controlfroma distance. its displacement over its entire length.
  • Fig. 1 is a plan view of the rear of atankfurna-ce and of the head thereof, onxwhich-there is fitted a feeding arrangement of the type. described in applicants Belgian Patent'No. 466,139 of the 22nd June 1946,
  • Fig. 2 is a vertical section along the lineII-II of. Fig. 1,
  • Fig. 3 is across-section along the line III- III of Fig. 1,
  • Fig. l is a plan view; similar to .that of Fig. 1, showing another formv of embodiment of the method,
  • Fig. 5 is a cross-section along the-line 1V--V:of Fig. 4,
  • FIG. 6 is asection similar to Fig. 5, but showing a variant of the arrangementof-Figs. 4 and5,
  • Fig. 7 is-a plan view similar to Fig. 1, showing :another form of theinvention
  • Fig.8 isa longitudinal section along the line VIII-VIII ofiFig. '7, and
  • Fig. 9 illustrates the application of the method according to .the invention to a'furna-ce equipped .witha feeding arrangement different from that :of 2 the :preceding figures.
  • The.furnace-feeding arrangement 3 here shown is the .bladedroller of the arrangement forming the. subjectof applicants Belgian Patent No. 466,139, but it will be understood that it may be replaced-by any other arrangement for feeding .the batchin sheet form into the furnace. 20
  • the sheet ofbatch 5 is deposited at '1": by a distributby the feeding'arrangementii, which also imparts thereto an impulse causing it to progress continuously towardsthe interior of the furnace.
  • The, glass ingredients which arehandled by the apparatus and method of the present invention have been referred to as batch and may here- These terms of limitation.
  • the method and apparatus of the invention are adaptable for use with substantially alluingredients'used in glass making and with a wide range of particle sizes.
  • the use of these .phrases is not intended to limit the invention to .the use of any specific material nor to any specific particle size or range of sizes.
  • a partial or differential retarding action is exerted on its movement.
  • a resistant element which can be constructed of refractory material, or which may be constituted by a metal pipe in which water circulates, as shown at 1.
  • the said pipe may be curved as shown in Fig. 3 and it is so inclined as to touch the sheet of batch 5, and even to penetrate into the said sheet over a part of its length.
  • the position of the said pipe may be controlled so as to vary the position and the length of its zone of contact with the sheet of batch and the strength of its action thereon.
  • the force which moves the batch downwardly is a resultant force derived from the driving force acting on the sheet and the reactive force acting through the pipe I.
  • the reactive force of the pipe I has a component acting in opposition to the forward movement of the sheet.
  • the friction of the batch against the pipe also tends to retard the movement of the sheet and the underlying layer of molten glass.
  • the reac tive force opposing the forward movement of the sheet and the friction of the sheet against the pipe 1 both increase as the pipe I is lowered. Consequently the retarding effect increases as the pipe is lowered. In the construction shown in Fig. 3, the retarding effect also varies from one edge of the sheet to the other.
  • the height and the inclination of the pipe with respect to the sheet may be varied by adjusting the height and the inclination of the pipe with respect to the sheet, as also the length of pipe brought into contact with the batch.
  • This adjustment is effected by means known per se, for example by raising or lowering one or both of the supports I4, IS.
  • the retarding effect of the pipe 1 produces either a compression of the batch in the direction of the forward movement of the sheet, or a relative sliding of the furnace feeding member with respect to the sheet, this sliding taking place on the part of the sheet which is aligned with the portion in contact with the pipe and being proportional to the strength of the action of the said pipe.
  • the initial speed imparted by the feeding arrangement to the sheet which speed was constant at all points- is modified proportionally to the strength of the retardation.
  • the resultant speed is therefore variable from one edge of the sheet to the other, being lowest at the point 8 and highest at the point 9. It follows that the sheet of batch undergoes a rotational movement and spreads out fanwise, its edges following paths such as CDE and AFGI-I (Fig. l).
  • the pipe I may also be given other forms, for example that shown in Fig. 5.
  • the retarding action is highest on the edges of the sheet and lowest or even zero at the centre, according to whether the pipe emerges in the neighbourhood of the axis of the sheet or not.
  • the speed therefore varies from one edge to the other, being lowest on the edges and highest at the centre.
  • the sheet is then spread out fanwise in the form shown in Fig. 4, the edges following paths such as AEF and CMN, so that it eventually covers all the surface of the bath in th tank of the furnace, thus enabling a continuous sheet of batch to be set up, which extends over the entire width of the tank I, while the head 4 through which it is introduced is of substantially smaller width than the actual tank.
  • the dotted lines represent the evolution of the 7 form of a generatrix AC in proportion as it progresses.
  • the retarding device is located, not on the output side of the feeding arrangement 3, but well in front of it, between the point at which the sheet of batch is deposited on the molten glass and that at which it receives its impulse from the feeding machine 3 for the purpose of feeding it towards the interior of the furnace.
  • Tests carried out by the applicants have in fact proved that if the differential retarding action is exerted on the sheet of batch slightly before it receives the said impulse, it behavesby reason of its cohesionin-the same manner as if the retarding actionwere applied on -the output side of the feeding arrangement.
  • a method of feeding batch in granular form into a glass furnace comprising feeding the batch onto the surface of the molten glass as a floating sheet of substantially uniform thickness, imparting an impulse to the sheet to move it into the furnace, and applying a retarding action to a portion only of said sheet adjacent the upper surface thereof and having a substantial depth, while leaving a laterally adjacent portion unretarded, so that the unretarded portion moves faster than and is turned toward the retarded portion.
  • a method of feeding batch in granular form into a glass furnace comprising feeding a floating sheet of batch onto the surface of the molten glass near one end of the furnace, impelling said sheet towards the opposite end of the furnace, and blocking the movement in the direction of said opposite end of a portion of said sheet adjacent the upper surface thereof and having a substantial depth which varies across the width of the sheet, so that the speed of the sheet is varied in proportion to the depth of the blocking and the less blocked portions move faster than and are turned toward the more blocked portions.
  • a method of feeding batch in granular form into a glass furnace comprising feeding the batch onto the surface of the molten glass near one end of the furnace, spreading the batch over the glass to form a floating sheet of substantially uniform thickness, impelling said sheet towards the opposite end of said furnace, applying a retarding action to said sheet over only part of its width, and varying the direction of progress of said sheet by regulating said retarding action.
  • a method of feeding batch in granular form into a glass furnace comprising feeding the batch onto the surface of the molten glass near one end of the furnace, spreading the batch over the glass to form a floating sheet of substantially uniform thickness, impelling said sheet towards the opposite end of said furnace, and applying a controllable retarding action to the upper surface of the marginal portions only of said sheet.
  • a method of feeding batch in granular form into a glass furnace comprising feeding the batch onto the surface of the molten glass as a floating sheet interrupted in the center, impelling the two parts of said sheet side by side towards said furnace, and applying a retarding action to the outer marginal portions only of said sheet.
  • An apparatus forfeeding batch" into a glass the progress of of its width, said retarding means comprising. at
  • At least one member reachin'g below the surface of said sheet but above the surface of the glass.
  • the means for producing a retarding action on the sheet of batch comprises a tube extending across said sheet and inclined downwardly on at least one side thereof.
  • An apparatus for feeding granular batch into a glass furnace comprising in combination with a furnace, means for feeding side by side two floating half-sheets of batch onto the surface of the molten glass at the inlet end of said furnace, means for impelling said half-sheets towards the opposite end of said furnace, and means for producing a retarding action on the progress of said half sheets, said means engaging said half-sheets only near the outer edges thereof.
  • An apparatus for feeding pulverulent batch into a glass furnace comprising in combination with a furnace having a head narrower than the main furnace, means for distributing a floating sheet of pulverulent batch over the surface of the molten glass and extending substantially the whole width of said head, means for impelling said sheet towards and into said furnace, and means in contact with the marginal portions only of the upper surface of said sheet to retard the progress of said marginal portions and cause said sheet to spread laterally into the furnace.
  • a method of feeding batch in granular form into a glass furnace comprising the steps of feeding the batch onto the surface of the molten glass as a floating sheet of substantially uniform thickness, applying to said sheet a driving force which is substantially uniform over the width of the sheet, and blocking the movement in the direction of said force of a portion of said sheet adjacent the upper surface thereof and having a thickness which varies along the width of the sheet, so that the speed of the sheet is varied along its width and the faster moving portions are turned toward the slower moving portions, thereby diverting at least part of the sheet from the direction of movement imparted by said driving force.
  • Apparatus for feeding batch into a glass furnace comprising means for feeding onto the surface of the molten glass a floating sheet of batch in granular form, said sheet being of substantially uniform thickness, means for diverting at least part of the sheet from the direction of movement imparted by the feeding means comprising means projecting downwardly into the path of travel of the sheet a distance which varies along the width of the sheet, said downwardly projecting means being effective to retard the speed of the portions of the sheet engaged thereby.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Melting And Manufacturing (AREA)
  • Braking Arrangements (AREA)
US108554A 1948-08-20 1949-08-04 Method and apparatus for feeding glass furnaces Expired - Lifetime US2624475A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE2624475X 1948-08-20

Publications (1)

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US2624475A true US2624475A (en) 1953-01-06

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Application Number Title Priority Date Filing Date
US108554A Expired - Lifetime US2624475A (en) 1948-08-20 1949-08-04 Method and apparatus for feeding glass furnaces

Country Status (4)

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US (1) US2624475A (fr)
BE (1) BE484466A (fr)
DE (1) DE816127C (fr)
NL (1) NL147813B (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926458A (en) * 1955-12-13 1960-03-01 Owens Illinois Glass Co Colored glass frit feeder
US2934225A (en) * 1953-03-24 1960-04-26 Pittsburgh Plate Glass Co Method and apparatus for feeding batch materials
US3074568A (en) * 1958-02-05 1963-01-22 Libbey Owens Ford Glass Co Method of and apparatus for feeding glass batch materials
US3077273A (en) * 1957-10-28 1963-02-12 Libbey Owens Ford Glass Co Apparatus for feeding glass batch materials
US3193119A (en) * 1963-09-25 1965-07-06 Libbey Owens Ford Glass Co Method and apparatus for feeding batch materials to a glass-melting furnace
US4004903A (en) * 1975-06-05 1977-01-25 Libbey-Owens-Ford Company Method of and apparatus for increasing the melting rate of glass making materials
FR2455567A1 (fr) * 1979-05-01 1980-11-28 Central Glass Co Ltd Dispositif de production de verre a vitres
US4319904A (en) * 1980-09-08 1982-03-16 Ppg Industries, Inc. Method and apparatus for guiding glass batch in a glass melting furnace

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1083511B (de) * 1958-02-05 1960-06-15 Libbey Owens Ford Glass Co Verfahren und Vorrichtung zum Zufuehren feiner Teilchen glasbildenden Materials in das Eingangsende eines Ofens

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1623057A (en) * 1925-05-14 1927-04-05 Mississippi Glass Co Batch feeding to glass tanks
US2281050A (en) * 1940-04-11 1942-04-28 Pittsburgh Plate Glass Co Batch feeding apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1623057A (en) * 1925-05-14 1927-04-05 Mississippi Glass Co Batch feeding to glass tanks
US2281050A (en) * 1940-04-11 1942-04-28 Pittsburgh Plate Glass Co Batch feeding apparatus

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2934225A (en) * 1953-03-24 1960-04-26 Pittsburgh Plate Glass Co Method and apparatus for feeding batch materials
US2926458A (en) * 1955-12-13 1960-03-01 Owens Illinois Glass Co Colored glass frit feeder
US3077273A (en) * 1957-10-28 1963-02-12 Libbey Owens Ford Glass Co Apparatus for feeding glass batch materials
US3074568A (en) * 1958-02-05 1963-01-22 Libbey Owens Ford Glass Co Method of and apparatus for feeding glass batch materials
US3193119A (en) * 1963-09-25 1965-07-06 Libbey Owens Ford Glass Co Method and apparatus for feeding batch materials to a glass-melting furnace
US4004903A (en) * 1975-06-05 1977-01-25 Libbey-Owens-Ford Company Method of and apparatus for increasing the melting rate of glass making materials
FR2455567A1 (fr) * 1979-05-01 1980-11-28 Central Glass Co Ltd Dispositif de production de verre a vitres
US4319904A (en) * 1980-09-08 1982-03-16 Ppg Industries, Inc. Method and apparatus for guiding glass batch in a glass melting furnace

Also Published As

Publication number Publication date
BE484466A (fr)
NL147813B (nl)
DE816127C (de) 1951-10-08

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