US1121559A - Combined roasting and smelting furnace. - Google Patents

Description

W. R. HBSLBWOUD. COMBINED ROASTING AND SMBLTING FURNAGE.

APPLICATION FILED MARy 9, 1914.

1,121,559, Patented Dec. 15,1914.

'ITNESSES: I.\' Y PINTOR WILLIAM R. Hnsnnwoon, on OAKLAND,

CALIFoRNIAASSIGNon 'ro HYDRO VACUUM SMELTING- CO., OF OAKLAND, CALIFORNIA, A CORPORATION OF (J.ALIFOIRJ.\1IA.

COMBINED ROASTING AND-SMELTING FURNACE.

To all whom it may concern.'

Be it known that I, WILLIAM R. H nsnns woon, a citizen of the United States, residing atOakland, in the county of Alameda and State of California. have invented new and useful Improvements in Combined Roasting and Smelting Furnaces, of which the following is a specification.

This invention relates to improvements in a combined roasting and smelting furnace. One of the objects of the invention is to provide a simple, substantial, easily o erated furnace of the character describe in which the ores to be smelted may be desulfurized and deoxidized before it is entered into the fusion zone of the smelting chamber.

. Another object of the invention is to providel means for conveying the heated gases discharging from the furnace to the'roasting chamber for -the purpose of heating` the roasting chamber.

Another object is to provide means for distributing the gases evenly throughout the ore within the roasting "chamber,

Further objects will hereinafter appear.

i The invention consists of the parts and the construction and combination of part as yhereinafter more fully described and claimed, having reference to the accompanying drawings, in which Figure 1 is a vertical longitudinal section. Fig. 2 isa cross section on line ww, Fig. 1. Fig. 3 is an end view of one of the twyer openings,l showing the position of the damper.

v Referring to the drawings, A indicates a smelting furnace or cupola, of suitable cross section and height, constructed of fire-brick or like material, which is provided with an upper and lower set of twyer openings 2 and 3. Suitably supported' above the chamber A is an ore roastin receptacle B, and connecting same with t e furnace A is a pipe 4 having a valve 5 mounted in its lower end through which the volume of ore fed to the lower smelting chamber may be controlled. Surrounding the roasting chamber is a series of'vertically positioned pipes 6 which connect with the top of chamber A at their lower ends, and at their upper ends with the roasting chamber through a series of pipes 7, in each of which is mounted a controlling valve 8. The upper end of the roasting chamber is connected, through a Specification of Letters Patent.

Application filed March 9, 1914. Serial No. 823,358.

pipe 9, with a feed hopper not here shown, and a valve 10 is provided at this point for the purpose of closing the upper end of the roasting chamber and also for the purpose -as indicated at 12, and the connection between the two is controlled by a damper or valve 18 of suitable construction. The particular type of furnace, indicated at A, is provided with angularly disposed twyers, as shown, and is particularly constructed for use in connection with oil burners of suitable construction, indicated at 14, and the openings of the twyers are preferably controlled by dampers 15 as shown in Fig. 3.

In operation, the roasting chamber is first chargedV with ore through pipe 9 and valve. 10. A fire is then started in the burners 14, in the lower twyer openings, and the heat thus generated is conveyed through pipes 6 and distributed through the connections 7 throughout the ore within chamber B. rl`hel ore is here treated until it is completely desulfurized. if sulfurous ores are being treated, or until itis completely deoxidized, when iron 4ores or the like are being handled. Valve 5 is then opened to permit chamber A to b completely charged. The ore is then directly acted on by the flame di scharging through the lower twyersand isv here melted and collected in a well in the usual manner. .Y

The upper twyers are used for severall purposes, first. to increase the heat of the gases discharging from the smelting chamber for the purpose perature within the roasting chamber: and, second, for the purpose of adding carbon to the gases thus discharging, when necessary. It often happens that the carbon admitted to the zone of fusion through'the lower twyers is entirely consumed. It is, therefore, an advantage in some instances to inject more carbon or other gases through the upper twyers.v The upper twyersy are also used for emergency cases, that is, if the lower twyers should happen to freeze up it would be possible to use Ithe upper twyers to of increasing the temf ing furnace, a plurality of clear the furnace. The 'connection formed between pipes 6 and 11 at l2 permits a portion or all'of the gases to be by-passed without entering the roasting chamber, while the several connections formed between pipes 6 and the roasting chamber permit a perfect distribution of the heated gases through the ores contained therein. Valves 8 provided at these points add greatly to produce a uniform result.

A furnace constructed and arrangedv in the manner shown is simple in construction and the regulation of the gases passing through the roasting chamber may be perfectly controlled; the temperature and quality of same being regulated to a more or less degree by the upper set of twyers as above described.

.The materials and arrangements of the several parts of the furnace are such as the4 experience and judgment of the manufacturerI may dictate.

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. In a furnace of the character described, the ycombination of a smelting furnace, a roasting furnace, means for conveying the heated gases discharging from the smelting furnace to the roasting furnace, means for distributing the gases evenly throughout the ore within the roasting furnace, an upper and lower set of twyers formed in the smelting furnace, and dampers in said twyers.

2. In a furnace of the character described, the combination of a smelting furnace, a roasting furnace mounted above the smeltpipes connecting the roasting furnace with the smelting furnace, a pipe connecting the two furnaces through which the ore may be fed, and a valve in said pipe.

3. In a furnace of the character described, the combination of a smelting furnace, a roasting furnace mounted above the smelting furnace, a plurality of pipes connected at their lower ends with the smelting furnace, a plurality of connections formed-be- `of said connections,

tween the upper end of each of said pipes and the roasting furnace, and means for conveying the ore from the roasting furnace to the smelting furnace.

4. In a furnace of the character described, the combination of a smelting furnace, a roasting furnace mounted above the smelting furnace, a plurality of pipes connected at their lower ends with the smelting furnace, a plurality of connections formed between the upper end of each of said pipes and the roasting furnace, a valve in each andA means for conveying the ore from the roasting furnace to the smelting furnace.

5. In a furnace of the character described, the combination of a smelting furnace, a roasting furnace, means for conveying the heated gases discharging from the smelting furnace to the roasting furnace, means for distributing the gases evenly throughout the ore within the roasting furnace, and means including valves in the connecting passages for regulating the temperature and mixture of the gasesl passing through the roasting furnace.

6. In a furnace of the character described, the combination of a smelting furnace, a roasting furnace mounted above the smelting furnace, a plurality of pipes connected at their lower ends with the smelting furnace, a plurality of connections formed between the upper end of each of said pipes and the roasting furnace, means for conveying the orefrom the roasting furnace to the smelting furnace, a discharge pipe connected with the roasting furnace, and means for by-passing a portion or all of the heated gases coming from the smelting furnace to said pipe.

In testimony whereof'I have hereunto set l my hand in the presence of two subscribing Witnesses.

WILLIAM R. HESLEWOOD.

Witnesses:

THos. F. GRABER, J. A. HEsLEwooD.

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