DE520174C - Use of a cylindrical rotating drum furnace according to - Google Patents

Description

Use of a cylindrical rotating drum furnace according to the patent 480856 It has been shown that the melting furnace, which is also used for refining, is after Patent 48o 8; G advantageous as a so-called forehearth for cupola furnaces. Blast furnaces and the like can be used. In connection with cupolas and the like it is considered to be mechanically acting Refinement process mainly the shaking of the melt material has been used. Apart from that However, this process does not reduce the stress on all components the intimate mixing of the melted material, i.e. the prerequisite for good degassing. Cleaning and refining the metal.

1: s are already known rotatable forehearths that are connected to the furnace shaft or to the tapping nozzle. While partial rotation was possible with these forehearths and thorough mixing of the melt was neither intended nor achieved, this mixing task can be fulfilled in the most perfect way by the device according to your main patent 480 856. According to the main patent 480 856, the molten material in the furnace body shown there is given both a rolling and a rocking movement when the furnace rotates. This results in the possibility of bringing about ideal mixing of the molten material parts while protecting the components: According to the present invention, the device according to main patent 4.8o 856 is now used as a forehearth for cupolas and the like. In this way, the advantages of the known forehearth (uniform advancement of the melting column, keeping the melting material warm, etc.) are combined with the advantages of effective mixing, degassing, cleaning and overheating of the material, so that a simple cupola furnace system can be incorporated into such a furnace without significant additional expense is converted with a finishing device. In this case, the filling opening of the device according to your main patent can of course be omitted. The heating gases are introduced at one end of the device, while the other end forms the inlet channel for the melt material coming from the front of the cupola furnace or the like.

An exemplary embodiment is shown in the accompanying drawing.

The cupola shaft z is with the forehearth a. your furnace according to main patent 48o 85 (i corresponds to, in connection. The melt material is temporarily after shutting down the melting furnace serving as forehearth through the tap hole 3 drained. after it was given to him rolling and rocking Movement is pretreated and refined.

For the transfer of the melt material emerging from the furnace shaft i In the forehearth: 2, an intermediate chamber 5 can be arranged, which is provided with a gas exhaust pipe G is provided. The heating gases of the burner .I can escape through this exhaust pipe 6. A lockable opening; provides access to the chamber 6 and the tap hole of the cupola. The introduction of surcharges, e.g. B. of ferromanganese, ferrosilicon. Phosphorus and the like to melt material is made possible.

It is also a direct connection to the forehearth inlet nozzle to the melt outlet point of the furnace i, especially in the case where The stove and the oven share heating. In addition, at the Überleitunct slag retention means known from furnace to forehearth use Find.

The furnace can also be exposed to the exhaust gases from the furnace.

In the same way as with a cupola furnace, the device can also find application in a blast furnace or other melting furnace.

Claims (1)

PATENT CLAIM: Use of a cylindrical rotating drum furnace according to patent 489 856 as a forehearth for cupolas and shaft furnaces.