US1027882A

US1027882A - Smelter-furnace.

Info

Publication number: US1027882A
Application number: US63730111A
Authority: US
Inventors: Watson Marshall Nesbit; Edward Pike
Original assignee: Individual
Current assignee: Individual
Priority date: 1911-07-07
Filing date: 1911-07-07
Publication date: 1912-05-28
Anticipated expiration: 1929-05-28

Description

W. M. NESBIT & E. PIKE.

SMELTER FURNACE.

APPLIOATION FILED JULY 7, 1911.

1,027,882, I PatntedMay28, 1912.

3 SHBETB-SHEET 1.

- WITNESSES 11 ITO/FIVE Y8 W. M. NESBIT & E. PIKE.

SMELTER FURNACE. APPLIUATION FILED JULY 7, 1911.

1,027,882, Patented May 28, 1912.

3 SHEETS-SHEET 2.

l I Byjzizz/ard j he ATTORNEYS COLUMBIA PLANOGRAPH 60.. WASHINGTON. D. c.

WITNESSES W. M. NESBIT & E. PIKE.

SMELTER FURNACE. APPLICATION IILEDIJULI'I, 1911.

1,027,882. Patented May 28, 1912.

3 SHEETS-SHEET 3.

COLUMBIA PLANOGRAPH cu., WASHINGTON, D. c.

WATSON MARSHALL NESBIT AND EDWARD PIKE, OF EUREKA, UTAH.

SMELTER-FURNAGE.

Specification of Letters Patent.

Patented May 28,1912.

Application filed July 7, 1911. Serial No. 637,301.

To all whom, it may concern:

Be it known that we, IVATsoN M. Nissan and EDWARD PIKE, both citizens of the- United States, and residents of Eureka, in the county of Juab and State of Utah, have invented a new and Improved Smelter-Furnace, of which the following is a full, clear, and exact description.

The invention relates to metallurgy, and its object is to provide a new and improved smelter furnace for the reduction of metalbearing ores, and arranged to produce an intense heat for the quick and economical reduction of all kinds of ores, even very refractory ores, to prevent accretions on the inner surface of the wall of the stack and to insure a complete combustion ofthe fuel and the uniform distribution of the heat through the charge.

For the purpose mentioned, use is made of a stack provided in the wall with inlets below the smelting zone, and means for producing a central suction in the top of the stack so that air, pulverized coal, coke or charcoal, or liquid or gaseous fuel is drawn through the said inlets into the stack and the products of combustion are drawn out of the stack.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in

I which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a plan view of the smelter furnace, part being in section; Fig. 2 is a vertical central section of the same, on the line 22 of Fig. 1; Fig. 3 is an enlarged face view of one of the flat chambers on the outside of the stack with the door of the chamber open; Fig. 4 is an enlarged sectional plan view of the stack on the line t4 of Fig. 2; Fig. 5 is a cross section of the charging device, the section being on the line 5-5 of Fig. 2, and Fig. 6 is an enlarged vertical section through one of the air supply ducts.

The stack A of the smelter furnace is built of brick or other suitable material, of suitable dimensions and shape, in cross section, and the bottom of the stack A is provided with the usual crucible A, from which leads a tap and slag pipe A for drawing off the molten metal and slag. The stack A is preferably mounted on a supporting plate B held on standards B set on a suitable foundation, as indicated in Fig. 2. The top A of the stack A is provided at its center with an outlet flue C connecting with one end of a heating chamber D, provided at its other end with a line E leading to an exhaust fan F or similar machine for produclng a suction in the heating chamber D and by way of the flue G in the upper portion of the stack A, so that the products of combustion arising from the burning fuel in the stack A are drawn out of the same and pass through the heating chamber D. The fan F has its outlet pipe F discharging into the water contained in a suitable tank G so that the products of combustion are discharged into the water, to be condensed and any fine particles of metal carried along with the products of combustion and precipitated in the tank G to be ultimately recovered by any suitable process.

The wall of the stack A is provided im mediately below the smelting zone and above the crucible A with inlets A opening into the lower ends of flat chambers I-I attached to the outside of the wall of the stack A, the chambers H being provided at their lower ends with doors II' having peep holes H and the upper ends H of the chambers H are contracted, and the contracted end of each chamber H is connected with a supply pipe I passing through the wall of the stack A to the inside thereof to then extend upwardly within the upper portion of the stack A, to finally pass out through the top A and into and through the heating chamber D as plainly indicated in the drawings. The outer ends of the pipes I are provided with funnels I for the ready entrance of air into the pipes I. As the latter extend through the heating chamber D, the pipes and the air passing through the same are heated, the air and the pipes extending with in the upper portion of the stack A being highly heated and the heated air finally passes into and through the flat chambers H and by way of the inlets A into the lower end of the stack A to then rise through the charge to supply the latter with highly heated oxygen to insure a complete combustion of the fuel in the charge. A

fluid fuel pipe J connected with an overthat the oil, gas or other fluid fuel can be fed into the pipes I to be vaporized and passed through the chambers II and inlets A into the lower end of the stack A to augment the fuel contained in the charge. Pipes J 2 are connected with the pipes I adjacent the funnels I, and the said pipes J 2 are connected with the breeching of a boiler; so that the escape heat, smoke and gases can readily pass into the pipes I and conducted by way of the chambers H and the inlets A into the lower end of the stack A. The pipes I, J, J and J are provided with suitable valves for controlling the flow of the fluids through the pipes. The pipes I are also connected within the heating chamber D with branch pipes K leading to a tank L, preferably mounted on top of the heating chamber D and containing water, so that water is passed into the pipes I to be converted into dry steam by the heat within the chamber D, and the steam is passed by way of the chambers H and inlets A into the lower end of the stack A.

When it is desired to feed solid fuel, such as pulverized coal, coke, charcoal or the like into the stack, the pipes I are correspondingly enlarged, and suitable means are employed for filling the solid fuel into the pipes I. It is understood that the pipes I may be used for conducting heated air only, or liquid, solid or gaseous fuel or water to be converted into dry steam, according to the nature of the ores to be reduced.

It is understood that when the smelter furnace is in use, the suction produced in the upper end of the stack A causes a ready inflow of the air or fuel by way of the pipes I and chambers I-I into the lower end of the stack, to then pass through the charge and thereby insure the formation of an intense heat with a view for quick reduction of the metal-bearing ores.

The charge is passed into the stack A from a charging platform N, preferably level with the top A of the stack A, and from the charging platform N leads a segmental charging duct 0 in. a. downward and inward direction to pass through the wall of the stack A a distance below the top A thereof, as plainly indicated in Fig. 2. The duct 0 is provided with two charging gates P and P provided with suitable racks P P in mesh with pinions P*, P secured on shafts Q, Q, journaled in suitable bearings arranged on the platform N. The shafts Q, Q are provided with hand wheels Q Q under the control of the operator for inclependently opening and closing the gates P and P. hen it is desired to charge the stack A, the gate P is raised into an open position by turning the hand wheel Q? correspondingly, and then the charge is shoveled from the platform N into the duct 0, down which the charge passes until it reaches the closed gate P. The gate P is now closed and the gate P is opened, so that the charge now continues its journey through the duct 0 to finally dropinto the stack A. When it is again recharged the gate P is closed and the gate P is opened, and the above-described operation is repeated. Itwill be noticed that by the arrangement described the atmospheric air is prevented from passing through the charging duct 0 into the stack A during the charging operation.

Air supply ducts R extend through the top A of the stack A down along the inner faces of the wall of the stack, the lower ends of the ducts R terminating at or about the level of the top of the entrance of the charging duct 0 into the stack A, as indicated in Fig. 2. The upper outer ends of the ducts R are provided with doors R to regulate the amount of air admitted to the ducts R by opening the doors R more or less. The air ducts R gradually widen from the top downward to allow the air as it becomes heated during its descent to expand. The inner walls of the ducts R are preferably extended somewhat below the outer walls of the chambers as particularly shown in Fig. 6 to prevent particles of the charge from entering the ducts and clogging the same. By the arrangement described air is passed directly into the stack A along the inner sides of the walls of the stack immediately above the charge so that suificient oxygen is supplied to the product-s of combustion arising from the burning fuel in the stack to cause a complete combustion in the top portion of the stack and at the same time the inner face of the wall of the stack is kept free and clear of accretions, and hence the stack is not liable to clog up.

By the arrangement described a quick smelting of the ores is accomplished with a comparatively small amount of fuel, owing to the fact that a large amount of air is supplied above and below the charge to insure complete combustion of the fuel.- It will also be noticed that by drawing the products of combustion centrally out of the stack by the action of the fan F, the air, steam or liquid or other fuel entering the stack at the inlets A is drawn uniformly through the charge, to insure a complete burning of all the fuel thereby leaving no black or .unconsumed portions of fuel in the stack.

Having thus described our invention, we claim as new and desire to secure by Letters Patent:

1. A smelter furnace, comprising a stack provided in its wall below the smelting zone with inlets, a heating chamber communicating with the upper end of the stack, supply pipes passing through the said heating chamber and leading to the said inlets, means for producing a suction in the said heating chamber and in the upper portion of the said stack and ducts leading through wardly along the stack walls to open into the stack above the charge.

2. A smelter furnace, comprising a stac provided in its wall below the smelting zone with inlets, a heating chamber connected with the upper end of the stack, supply pipes passing through the said heating chamber and leading to the said inlets, fluid fuel pipes connected with said supply pipes, hot gas pipes also connected with said supply pipes and means for producing a suction in the said heating chamber and in the upper portion of the said stack.

3. A smelter furnace, comprising a stack provided in its wall below the smelting zone with inlets, a heating chamber connected with the upper end of the stack, supply pipes passing through the said heating chamber and leading to the said inlets, fluid fuel pipes connected with said supply pipes at points between the heating chamber and the top of the stack, and means for producing a suction in the said heating chamber and in the upper portion of the said stack.

4. A smelter furnace, comprising a stack, means for producing a suction in the upper portion of the stack above the charge, and air supply ducts passing through the top of the stack downward and ranging along the inner faces of the stack walls to open into the stack above the charge.

5. A smelter furnace, comprising a stack, means for producing a suction in the upper portion of the stack above the charge, and air supply ducts extending through the top of the stack downward and ranging along the inner faces of the stack walls to open into the stack above the charge, the said supply ducts increasing in width from the top downward.

means for producing a suction in the upper portion of the stack above the charge, air supply ducts extending through the top of the stack downward and ranging along the inner faces of the stack walls to open into the stack above the charge, and a segmental charging duct opening at its lower end into the stack immediately belowthe lower ends of the said air supply ducts.

8. A smelter furnace, comprising a stack, means for producing a suction in the upper portion of the stack above the charge, air supply ducts extending through the top of the stack downward and ranging along the inner faces of the stack walls to open into the stack above the charge, a segmental charging duct opening at its lower end into the stack immediately below the lower ends of the said air supply ducts, and a pair of independently-operated gates in the said charging duct and spaced apart.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

WVATSON MARSHALL NESBIT. EDWARD PIKE. Witnesses:

JOHN MARTIN, C. C. PARKER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

I Washington, D. 0.