DE842C - Furnace for the manufacture of steel and other molten metals - Google Patents

Description

1877.

- JVa 842 - class 18.

AUGUST PONSARD in PARIS. Furnace for the manufacture of steel and other molten metals.

Patented in the German Empire on August 5, 1877.

The apparatus consists of a furnace, the base of which can be rotated around a slightly inclined pin and is provided with tubes close to the bottom so that air can enter the body during the operation Metal bath can be blown in while one, if the air flow · interrupted should be, these tubes are raised above the level of the metal bath by the The sole can be turned in part.

This apparatus is intended to serve a mixed process in which the molten metal in a movable sole furnace first, as at the Bessemer process, exposed to a strong flow of air, and then after the so-called Reaction process is treated, d. H. that one test the metal, and add it to it of carburizing or oxidizing substances, depending on the particular purpose, to finally let it run out of the oven when the desired quality has been achieved.

The furnace that is used here can be a gas furnace, or a Ponsard'scher, Siemens'scher or Crampton'scher, a furnace for heavy oils, or a those with direct firing, with or without a fan, but in all cases it is inclined The sole rotatable in the pin is set up in such a way that the liquid bath has sufficient place can change to expose the nozzles used to inject the air as soon as the air flows in is placed in the apparatus.

1, ^{2, 3 and} 4 of the accompanying drawings show the arrangement of an inclined sole which can be rotated about a pin and which is located under the arch of a gas furnace. As can be seen from Fig. 1, the gases flow in at one end and escape at the opposite end.

A is the rotatable inclined sole containing the metal bath; It is provided with a number of nozzles B at one point on its circumference. These nozzles lead from a common sleeve C, which forms one piece with the fitting of the apparatus.

The Giefsloch D is located at the point opposite the nozzles.

The sole rests on a cast-iron crown E, which is provided on its central lower part with a gate F , which forms the inclined pin G of the sole A. This slightly conically shaped pin is hollow and provided with openings for the passage of air.

The crown E is, as can be seen from FIG. 3, with a right-angled channel // which opens into the sleeve C and conveys the air blown in through M to the same. The lower part of this crown is provided with a series of rollers J , which serve as support points for the crown against the cylindrical mantle K of the pin G. The lower part of the jacket K rests on the carriage L and carries the pipe socket M on the side, which is provided with the air inlet valve N.

The carriage rests on four wheels O, which move freely on the rails P ; in the middle it has an opening for receiving the lower part of the mantle K. The latter is provided with a screw Q on which the pin G rests with its base.

Furthermore, the carriage L is extended towards R in order to carry a frame S which in turn carries the shaft T provided with a conical wheel. The conical wheel is moved by a gear which is fixed on the shaft U (Fig. 4) which is provided with cranks V at both ends.

The upper part of the shaft T carries the disc X, through which the movement is transmitted to the sole with the aid of a chain or other means of transmission and the groove Y made around the crown.

In order to finally shut off the air access to the apparatus when the inclination of the sole has led the metal bath to the side of the foundry hole, the arm W of the valve N is rotated at the relevant moment by the attachment Z of the crown E and the valve is thereby closed.

When the sole is in the position shown in FIG. 3, the entire metal bath is in front of the Giefsloche D; while, if the bath is on the side of the insufflation nozzles, the blown air passes through the metal bath and refreshes it, similar to a Bessemer converter.

One can thus let the furnace describe a more or less large angle of rotation,

so ζ. B. can be done by the Giefsloch Brings to the level of the metal bath the molten slag that is on top swim, let it drain away slightly, while when the Giefsloch is in the lowest position is brought, it is used for parting the finished product.

One sees from this that one can check the quality of the metal with the apparatus, and, as happens in steel manufacture on the sole, carburizing or oxidizing Add substances and in the given moment, fried iron, ferro-manganese or something else Can introduce metal. The racking takes place either, as with the Bessemerprocefs, in a Giefskelle, or in a series of Zainenformen, which are brought in front of the Giefsloch.

As can be seen, the Gufs can be poured in in the molten state, or it can be poured cold introduce and melt in the oven; Likewise, if this should be desired, one can Add waste iron to the Gufs which has got into the flow and complete the fresh process by to blow air in; one can, however, also operate with cast iron without any additive.

As with Bessemerprocefs, the Gufs can be taken out of the blast furnace, its Blower itself can be used to blow the air onto the sole.

The Gufs can also be poured cold, just like in an ordinary flame oven melt it and then freshen it up by blowing in air.

One of the most important advantages of the apparatus is that it provides the same treatment Every type of Gufs is permitted without distinction, since freshening can be done with the greatest ease not only by blowing in air but also in such a way that to dissolve iron scraps or other suitable substances in the bath.

What z. B. especially concerns certain types of cast iron, which, like the low-silicon for the Bessemerprocefs are not suitable, it is sufficient to overheat them in the oven before using them exposed to the action of the driven air flow.

Likewise, one can use high-silicon cast iron by following it If necessary, add a comparatively large amount of iron waste.

It should be noted that in steel manufacture according to the Bessemer process it is difficult to introduce into the converter all the rod ends and waste which arise during manufacture, so that one has to use a melting furnace with sole, like those in the Bessemer process, as supplementary pieces are to be erected; on the other hand can be in the steel fabrication to the sole by Reaction the Gufs alone does not work, one is therefore forced to effect refining in the manner to a considerable amount of DAF in the Gufsbade iron _^(2/3 to% of Gesammtgewichte the charge), and as a rule the iron waste is more expensive than the Gufs which comes out of the furnace to be brought to the Bessemer converter.

The new apparatus avoids these two inconveniences; the same permitted in the That all scraps and rod ends which result from the transformation of the cast iron into steel or give iron to dissolve in the bath; Furthermore, you can also use cast iron exclusively work without any additions.

This ease with which, according to my system, the fresh process can be achieved runs, allows the production of steel from silicon-containing or silicon-free, from manganese-containing or manganese-free cast iron, as well as unclean cast iron, which you can use as a result can be improved by feeding reagents through the nozzles, which are used in manufacture cannot be used successfully on the sole.

Claims (2)

Patent Claims: 1. The arrangement of a sole, which rotates around an inclined axis in the pin and in Lets introduce an oven, in connection with blowing nozzles close to the bottom of the sole, so that air, gas, or other substances are used, depending on the position of the sole gives, either in the molten mass • or can conduct on their surface. 2. The arrangement of the apparatus with a rotatable sole and blowing nozzles, which are close to the Floor of the sole are attached, wherein the gas or air flow is fed through the hollow pin of the device, in essentially as described above and shown in the accompanying drawing. For this purpose ι sheet of drawings.