US979647A - Regenerative furnace. - Google Patents

Description

SJ "new tots,

Patented Dec.27, 1910. O 2 SHEETS-SHEET 1.

A. W. & O. W. GATTON,

REGENERATIVE FURNACE.

APPLIOATION FILED AUG.10. 1900.

A. W. & G. W. CATTON.

REGBNERATIVE FURNACE.

APPLICATION FILED AUG. 10. 1909 Patented Dec. 27, 1910.

/L I -%'I R a C LMJ l L n akto'wveg chambers FG and .FG and THUR W. CATTON AND CHARITIES W. CATTON, OF WEST SEATTLE, WASHINGTON.

REGENERATIVE FURNACE.

Specification of Letters Patent. Application filed August 10, 1909. Serial No.

Patente ee.: 27, 1910 To all whom it may concern:

Be it known that we, ARTHUR CAT: TON and CHARLES W. CATToN, citizens of the United. States, residing at the city of West Seattle; in the county of King and State of ashington, have invented certain new and useful Improvements in Regenerative Furnaces, of which the following is a specification;

Our invention pertains to improvements in rever ratory regenerative furnaces designed for the roasting and smelting of ores. The objects of our invention are: First to provide a reverberatory furnace in which ores may be roasted and smelted at one and the same time. Secondto provide a furnace in which liquid fuel in the form of crude oil may be used to completely roast and smelt the most refractory ores; and irdto provide a liquid hydrocarbon or crude oil burner to be used in combination with our newly devised roasting and smelting furnace, and with which we are enabled to generate, control and apply an intensely high heat within the furnace, as the character of the ores may require. We attain these objects by means of the contrivance illustrated in the accompanying drawing, in which' A a Figure 1 is a vertical section lengthwise through, our invention. Fig. 2 is a horizontal section on the line 2-2. Fig. 3 is an enlarged section of one of the crude oil burners, showing its construction. Fig. 4 is a central vertical section of our invention from front to rear, and Fig. 5 is a side elevation' of the same.

Similar letters refer to similar parts in the several views.

The general form of our newly improved furnace is constructed on lines similar to the usual form of reverberatory furnaces designed for smelting ores. The 'hearths A-A of the smelting chamber B are in clined to a central lead well C, The ends of the smelting chamber have'flue connections -E and D'-E' through su erheating H with the smoke stack I. These fines and chambers are designed to be used alternately to carry off the waste products of combustion and to supply drafts of heated air as *the operation of the furnace is changed or reversed from side to side. The draft to the smoke stack I is reversed and controlled by the ues' H and is closed and the sulfurousfumespass dampers J-J' and the intake of fresh air is reversed and governed by the dampers K The fuel in combustlon is supplied alternately through the liquid hydrocarbon burners LL and LL located in the walls around each end of the smelting chamber, as shown in Figs. 1 and 2. a

The roasting chamber M is located directly above the smelting chamber B and is of equal width and length, with hearths a-a inclined rom the center to the charging holes-n and 91/ under the charging doors N and N the latter designed to receive ores that can be smelted without roasting. The central charging door 0 is designed to receive highly refractory ores that require roasting be ore smelting. A smoke pipe P having a damper p extends from under the door 0 to carry smoke and fumes from the roasting chamber -M to the smoke stack I. At each end of the roasting chambers are down draft flues g'g designed to convey sulfurous fumes tothe smelting chamber to be consumed therein when desired. This is accomplished by closing the damper p in the smoke pipe P In each end wall of the roasting chamber is located a liquid hydrocarbon burner L to provide the fuel for combustion. The doors QQ located in the walls of the roasting chamber M are to permit the ore to be turned and worked from the charging door 0 alternately along the hearths a and a and finally down the openings n and n into the smelting chamber B.

It is-to be observed that when in operation, the end of site from that of the smelting chamber is under heat.

Having thus briefly improved furnace, the operation is-as follows :-To charge the roasting chamber M, refractory ore is deposited and spread over the hearth af toward the right. If easily smelted ores are available, the smelting chamber B is charged through the door N and opening n. The liquid hydrocarbon burner L at the right endof the roasting chamber and similar burners L in the walls of the left end of the smelting chamber are turned on until a heat of sufii- -cient intensity to roast the ores on the hearth a andsmelt those on the hearth A is obtained. If the ores containsulfur, the damper p in the pip the roasting chamber oppothrough the door in the roasting chamber 110 described our newly the flues g into thesmelting chamber where turned off and burner and still further roast they are consumed in the more intense heat; The products of combustion from over the hearth A pass to the right over the hearth A ores that may be worked down through the opening a from the hearth a. The waste products of combustion now pass down through the flues D and E, the superheating chambers FG and out through flue H to the smoke stack I, the damper J being open and damper J closed. When the ores on hearth A are reduced and run into the lead-well C in the form of slag and molten metal, the furnace is reversed to allow hearth Ato be recharged.

In the meantime hearth A has been charged with ore. worked down from hearth a and with available smelting ores throu h the door N. The ores in the roasting c amber are now worked onto the hearth a. The burner L of the roasting chamber M and burners L of the smelting chamber B are Lof the former and burners L. of the latter are turned on, the damper J is closed and J opened, all of which reverses the working of the furnace from right to left. The air intake damper K is closed and damper K opened sufliciently to allow air to pass in through H and up through chambers FG, where it becomes highly superheated on entering the smelting chamber B through fines D-'E adds much to the combustion of the burners L. The supply of air is controlled by the damper K and the supply of oil-is governed by suitable valves in the supply pipes of the burners L and L. By this briefly described mode. of operation the furnace can be run for an indefinite period, the same being, reversed at suitableintervals as conditions may require. The molten metal is drawn ofl through the lower tap hole R and the slag through the upper tap hole S.

In each of the flues H and H side extensions TT are located on able intervals to give the fumes a zigzag course to the smoke stack. A steam pipe U and U made to discharge into the flues H and H respectively and alternately is designed to be used to precipitat e volatilized arsenic from the fumes as they pass therethrough and thus cause them to settle on the floor of the flue. The arsenic thus precipitated can be collected and saved for commercial purposes. Access to-the flues for collecting the arsenic can be had through .dampers KK The construction of the liquid hydrocarbon burners LL comprises a novel and essential part'of our newly improved furnace and has much to do in its efiectivene'ss'and success. This can be understood by referring to Fig. 3. With this burner the oil is de. livered into the furnace in a fine spray by means of compressedair supplied by pipe 1 into the outer nozzle'2 and the inner nozzle each the sides at suit- 3. The crude oil is supplied to the inner nozzle through the pipe 4, while the supply of compressed air is controlled by the-sliding sleeve valve 5 made to operate over the intake opening 6. By this means the supply and force 'of the spray of oil can be varied to meet requirements. The supply of air and oil can be further controlled by means of suitable valves in the pipes 1 and 4, as common with all supply pipes of this character. On the outer end 7 of the inner nozzle pipe is fixed a glass sight hole through which the operator can look to determine the perfection of combustion and the progress of the smelting operation.

uitable means common to burners of this character will be used to properly adjust them for applying the heat most effectively, and to properly protect them from the heat of combustion within the furnace.

It is to be understood that we do not limit ourselves to proportions and exact dimensions, but reserve the right to change and vary the same as conditions and circumstances may require.

Having thus described our invention, what we claim as new and desire to secure by LettersPatent is 1. In reverberatory type of regenerative furnace the combination of an upper roas ing chamber and a lower smelting chamber, of said chambers having two hearths oppositely inclined and means for using one of each of said two hearths alternatively, the upper hearth for roasting and the lower hearths for smelting ores substantially as shown and described, and for the purposes set forth.

2. In a reverberator type of regenerative furnace, the combination of an upperroasting chamber and a lower smelting chamber,

each of said chambers havin oppositely 1n-' clined hearths, and liquid hy rocarbon burners located in the end walls of each of said roasting and smeltingchambers, said burners being adapted to furnish liquid hydrocarbon or crude oil for combustion from each end of said chambers alternately, and thus generate the heat required to roast and smelt the ores on the hearths of said chambers, as shown and described and for the purposes set forth.

3. In a regenerative furnace the combination of an upper roasting chamber and a lower smelting chamber, said smelting chamber being located below the roasting chamber, each of said chambers having oppositely inclined hearths designed to be used alternately inroasting and smelting ores in the respective chambers, liquid hydrocarbon burners in the end walls of said roasting and smelting chambers to supply the necesouter nozzle to receive and discharge the chamber, each of compressed air and an inner nozzle to receive and discharge the fuel oil, a sleeve valve intake in said inner nozzle to receive compressed air from the outer nozzle and back of the oil intake, to spray the oil within the furnace for combustion substantially as described and shown.

4. In a reverberatory furnace the combination of a roasting chamber and a smelting said chambers having two oppositely inclined hearths, to be used alternately and. simultaneously, each of said chambers being provided with liquid hydrocarbon burners, and each of said burners having a sight hole in the tube of the inner nozzle, as described and shown and for the purposes set forth.

5. A reverberatory furnace having an upper roasting chamber with hearths oppositely inclined toward the end of said chamj her, and a lower smelting chamber with heart-hs oppositely inclined toward a central furnace the draft may be changed alternately from end to end, and superheated air furnished alternately therethrough to aid in the combustion of the fuel oil as described and shown.

In testimony whereof we afiixour signatures in presence of two witnesses.

ARTHUR W. CATTON. CHARLES W. CATTON. Witnesses:

M. A. BUTLER, THOMAS A. MEADE.

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