US2196864A - Melting furnace - Google Patents

Description

April 9 1940- w. R. HoNEs 2,196,864

IELIING FURNACE ATTORNEY.

April 9, l940- w. R. HoNE-s A 2,196,864

IELTING FURNACE Filed June l0, 1938 2Sheets-Sheet 2' INVENT OR.

WILL/17M F. #ONES BY a/L @awww/ ATTORNEY.

Patented Apr. 9,1940` william n. Hanes, Baidwin, N. Y., assignor to CharlesA. Hones, Inc.,

poration of New York Application June 10, 19,38, Serial No. 212,863

1 Claim;

This invention relates to a melting furnace. g The object lof the invention is the production of a melting o1' crucible furnace, heated to high temperatures, by means of atmospheric burners, preferably gas burners supplied with fuel at normal pressure slightly above atmospheric pressure, not requiring forced draft.

The second object of the invention is the production of a melting furnace,adaptedj tofmelt various metals, salts and the. like efficiently.

The third object of the invention is the'production of a melting furnace, constructed to quickly discharge the lproducts of combustion from its heating chamber to secure high temperatures therein and increasing the speedof heating the material treated in the pot of the furnace. l

I n the drawings Fig. 1 represents a front elevation of an exemplication of the improved meltingv furnace; Fig. 2 shows a top View of Fig. l; Fig. 3 indicates a section of Fig. 1 on the line 3, 3 andFigA is a section'of Fig. V3 on the line 4, 4;

The melting furnace is indicated with the cylindrical wall 2|) of refractory material, 'having the outer vertical cylindrical surface 2| and the inner vertical cylindrical surface '22. The top horizontal face of the wall 20 is shown at 25 and its bottom horizontal face is indicated at 26. A bottom horizontal wall 29 is indicated at the lower end of the cylindrical surface 22. The surface 22 and wall 29 form the cylindrical shaped heating chamber 30. A cylindrical outlet conduit is shown with the vertical memberA 3| at the axial center of the heating chamber 30, which joins with the horizontal member S2 that extends through the Wall `2l). The inlet ends of the members 3| and 32` are connected by the supplemental outlet conduit 33 extending from the bottom wall 29 of the heating'chamber 3U, to enhance the velocity of the flow of the products of combustion from said chamber. `A ytop plate 36 having the ,outer circiunferential flange 31 and the inner circumferential flange 38 is supported upon the top face 25 ofthe wall 26. A bottom plate 40 having the outer circumferential iiange 4| bears up against the bottom face 26 of the wall 20. A cylindrical steeljacket 42`Vsurrounds the wall 20 and its top and bottom ends respectively bear against the top plate 35 and the bottom plate 4D.

Three supporting legs 44 for the `furnace have their upper ends bolted to the bottomplate 4m An elbow 45 is secured to the jacket 42 and exhaust piping 46 is supported by said elbow.

A cylindrical baffle plate 48 has extending from rsemi-spherical lower end 6|, and the ,annularv vThe conduit is also a little larger in diameter 2|). It will be noted that the conduits '18, 8|] and '98 are indicated bunsen burner supporting bracklill.

Baldwin, N. Y., a corits lower face the lugs 49 upon the wall 29.

Upon the top plate Sli is supported the annular cover 52 having the annular fiange extending from its lower face and three supporting lugs k51|- 5 extend from its upper face.

A. cylindrical melting pot 60 extends into the heating chamber 3|? and is indicated with the' whichv are supported flange t2 at its upper end. The flange t2 bears 10 upon the supporting lugs 54.

A cylindrical shaped fuel inlet conduit it with its axial center in a plane coincident with the line 3, 3 see Fig. 1, extends through the wall 20. The conduit lil is preferably a little larger in V15 diameter than the annular space ,between the outer surface of the melting pot 60 and the surface 22 of the wall 20. The conduit l@ jis curved at I3 to meet the inner face 22 of the Wa1120. l 20 A second cylindrical fuel inlet conduit 80, identical to the conduit l0, has its axial center coincident with the line 8|, see Fig. y1, below the line'3, 3 and also extends through the wall 20.

than the space between the outer surface of the melting pot 6i) and the inner surface 22 of the Wall 2E. The conduit 80 is curved at 83 to meet the surface 22.

A third cylindrical conduit 9B, identical to the o conduit lil, has its axial center coincident with the line 9 i, below the line 8 I and extends through the wall 2t. The conduit 90 is also a little larger in diameter than the space between the outer surface of the melting pot 6|] and the inner surface 22 of the wall 20. The conduit et is also l curved, at 93 to meet the surface 22 of the wall are also horizontally spaced from oneanother to enter the heating chamber 3|) at equal n distances apart. Coaxial with each of the conduits lt, 80, and

ets Hill, which are identical withl one another. Each of the brackets li is shown with the cylindrical body portion mila that has integral therewith the oval shaped'flange The latter are secured to the steel jacket 42 by means of screw |92 andthe like. A cylindrical sleeve |83 at the inner face of each lo flange il extends into the wall 2U and a flange |114 extends from the outer end of each body portion leila. A pair of oppositely positioned openings HB5 are indicated in each body portion llllla` and extend through the flange I0|, tol provide a u.

supplemental air supply for the bunsen burners.

A bunsen burner designated in its entirety by the numeral l l is detachably maintained in each bracket |00.

Each bunsen burner H0 comprises the flange ||5 which is detachably bolted to its coacting flange |04, by bolts H6. From the inner face of each flange l5 extends the horizontal nozzle |20 and from the outer faces of the flanges ||5 extend the similar elbow shaped fittings |22, |22a and |221).

The usual tapered inlet conduits |23 with the funnel shaped inlet ends |24, extend from the fittings |22, |22a and |22b. The usual frame |25 extends from the end |24 and supports the chamber |26. A threaded pipe |28 extends from the chamber |26 into the funnel shaped inlet and |24. Nuts are shown at |30 and lill, and a regulating disc |32 is in threaded engagement with the pipe |28. A threaded pipe |34 extends from each chamber |25 and supports the usual regulating valves |35, with the handle |36.

From the valve |35 of the bunsen burner having the tting 122i? extends the vertical pipe |40, and from the valve |35 of the bunsen burner having the fitting |2f2a extends the pipe |45. The said pipes |40 and |4| at their lower ends have respectively connected thereto the elbows |42 and |43. Piping |40 with the cross ll connect the elbows |42, |43. A pipe |50 extends from the valve |35 of the burner having the tting |22 and at its lower end isshown the elbow |5I. The elbow |5| and the cross |41 are connected by the pipe |55. A fuel supply pipe |58 is connected to the cross |41.

A pilot light is provided for the bunsen burner having the `fitting |22 and in this instance is indicated with the horizontal pipe |60 extending from the T |6| in the pipe |50. A vertical pipe |63 with the valve |64 extends from the pipe |60,

and a. horizontal pipe |65 extends from the pipe |63 and leads to an opening |68 extending through the flange |0| of the bracket |00 of the bunsen burner having the filling |22.

The opening |68 extends through the Wall 20 and leads into the conduit 10.

To operate the melting furnace the melting pot 60 with its charge of material is positioned to extend into the heating chamber 30. The valves |35 are then opened by means of the handles |36 and the valve |64 in the pipe |63 of the pilot light is also opened and fuel flowing therethrough is lit. The fuel from each horizontal nozzle |20 of the bunsen burners is discharged into the conduits l0, 80, and 90, and is lit and twirled at different levels from said conduits around the outer surface of the pot 60 and melts the charge therein as required. It will be noted as the fuel descends toward the bottom of the heating chamber 30 it strikes the baiile plate 48 and is reflected upwardly and strikes the bottom portion of the melting pot 60.

Various modifications may be made in the invention and the present exemplification is vto be taken as illustrative and not limitative thereof.

Having described my invention I claim:

In a melting furnace the combination of a heating chamber having an inner Vertical cylindrical wall. and a bottom horizontal wall, an outlet conduit extending from said bottom wall, said outlet conduit comprising ya vertical meinber and a horizontal member and a supplemental outlet extending from the bottom horizontal wall of the said heating chamber connecting said members, means to charge said heating chamber with a heating iluid slightly above atmospheric pressure and a melting pot detachably supported in the heating chamber.

WILLIAM R. HONES.

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