US657031A - Blast and cupola furnace. - Google Patents

Description

No. 657,03l. Patented Aug. 28, I900. A. REYNOLDS.

BLAST AND GUPULA FURNACE.

(Application filed Dec. 7, 1898.) (No Model.) 3 Sheets8heat l.

5 u! m T W r A A C W CLZJL M QWW mgz N0. 657,03I. Patented Aug. 28, I900.

REYNOLDS.

BLAST AND GUPOLA FURNACE.

(Application filed Dec. 7, 1898.)

(No Model.) 3 Sheets-Sheet 2.

A V V A V VI I No. 657,03l. Patented Aug. 28, I900. A. REYNOLDS.

BLAST AND CUPOLA FURNACE.

(Application filed Dec. '7, 1898.

(No Model.) 3 Sheets-Sheat 3.

Nrrnn STATES PATET Danica.

ALLEYNE REYNOLDS, OF SHEFFIELD, ENGLAND.

BLAST AND CUPOLA FURNACE.

SPECIFICATION forming part Of Letters Patent NO. 657,031, dated August 28, 1900. Application filed D cember 7,1898. Serial No. 698,556- (No model.

To aZZ whom it may concern.-

Be it known that I, ALLEYNE REYNOLDS, a citizen of England, residing at Bolsover Hill, Sheffield,in the county of York,England, have invented certain new and useful Improvements in Blast and Cupola Furnaces, (for which I have applied for a patent in Great Britain, No. 22,182, dated October 21, 1898,) of which the following is a specification.

In blast and cupola furnaces as they are usually worked the metal-bearing materials are in direct contact with the solid fuel and the smelted or melted products are thus rendered more or less impure.

My invention has for its object the treatment of ores and metals in furnaces of the blast or cupola type in such a manner as to avoid the objectionable effects of their treatment in contact with solid fuel. For this purpose I blow through refractory twyers into the lower part of the furnace just above the well combustible gas and air under pressure, these or either of them being heated. I shall describe arrangements for this purpose which may be variously modified to suit various circumstances.

Referring to the accompanying drawings, Figure 1 is a vertical section, and Fig. 2 is a sectional plan, of a furnace worked with gas from two producers beside the cupola. Fig. 3 is a vertical section, and Fig. 4 a sectional plan, of a furnace worked with gas from a single producer near the cupola. Fig. 5 is a vertical section of a furnace worked with gas supplied from a distance.

Referring first to Figs. 1 and 2, O is part of a cupola, W its well, and H its tapping-hole. P is one of a pair of gas-producers situated near the cupola, one on each side, and com municating with its well by downwardly-inclined twyers T. A pipe A supplies compressed air to two branches A and A each furnished with regulating-valves V and check-valves V. The lower branch A supplies air to the lower part of the producer. The upper branch A extends through the upper part-0f the producer and partly into the twyer. Thus hot gas as it is produced and air partly heated produce a flame directed downward into the cupola and operate on its charge.

As shown in Figs. 3 and 4, a single producer Pis suppliedwith air at the bottom byabranch A from the compressed-air-supply pipe A, from which other branches A A pass to the twyers T at each side of the cupola C, while pipes G from the producer lead gas to the twyers T. V V are regulating-valves, and V V are check-valves.

When the gas, which may be water-gas, is supplied from a distance, the arrangement shown in Fig. 5 may be adopted. In this case the air and gas are supplied under pressure to the receptacles A and G, respectively, from which pipes A A lead the air and G G lead the gas to the twyers T, these pipes being furnished with regulating-valves V and checkvalves V. The check-valves V serve in all the arrangements described to prevent backflow, by which explosive mixtures might be formed in the pipes or receptacles.

The following are examples of the application of a cupola or such like furnace worked as described without solid fuel coming in contact with the charge: The furnace having a basic lining, such as dolomite lime or magnesite,is heated,and then charged to some height above the twyers with lumps of limestone. When the charge is well heated, pigiron, it may be with scrap and iron ore, is charged into the furnace with excess of lime stone. As the molten metal descends it parts with phosphorus and other impurities and the purified iron is tapped from the well. When the furnace is employed to smelt chromite, so as to obtain ferrochrome, the lining should be acid or neutral and water-gas is preferably employed.

Having thus described the nature of my invention and the best means I know for carrying the same into practical effect, I claim- In an apparatus for treating ores, the combination with a furnace of blast or cupola type formed with twyers sloping inwardly and downwardly to the inner wall of the furnace; with an apparatus for producing gas located one at each side of the furnace, and communicating with the furnace-twyers by pipes, a compressed-air supply, a branched pipe for conducting such com pressed-air supply under pressure both to the gas-prod ucer and inclined twyers to commingle with the hot gases as they enter the furnace; one of said pipes supplying air to the lower part of the gas-producer and the other of said pipes extending through the upper part of the gas-producer structed and arranged to operate substanand partially into the twyer, whereby the tially as and for the purpose set forth. generated gas and the partly-heated air pro- In testimony whereof I have hereunto set duce a flame which is directed into the furmy hand in presence of two subseribin, wit- 5 naee; of regulating-valves in said branched nesses.

pipes at each side of the main pipe, and check- 7 valves in each of said branched pipes for sup- ALLEX NE REYNOLDS plying the air whereby backflow of gas, by \Vitnesses: which explosive mixtures might be formed in J NO. P. M. MILLARD, lo the pipes or receptacles, is prevented, all con- FRED. O. HARRIS.

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