SU26026A1 - Rotating melting furnace with separate combustion chamber - Google Patents

Description

The comforts that rotating rotary smelting furnaces that have existed up to the present time have led to these furnaces, despite the fact that, from the point of view of the latest theory of the movement of hot gases, do not withstand any criticism, yet our E industry.

The main advantages of these furnaces include: ease of maintenance, extremely rational form (cylindrical) of the furnace casing, contributing to the long service of the furnace bricking, convenient gradual release of metal without fear of breakthrough tap holes (which can always be the case with stationary furnaces).

The largest drawbacks of these furnaces include the irrational, from the point of view of the latest theory of hot gases in furnaces, the location of the hole leading out these gases, which, serving in these furnaces for charging and for tapping metal, is located in the upper part of the cylinder and; therefore, it is understood that the hottest gases, as the lightest at the same time, tend to rise upward and go first to the outlet. In connection with this, the metal on the floor of the furnace (from the bottom of the cylinder) will always be in the expression

prof. at. E. Groom-Grzhimailo "in a cold gas cache. The result of this is all the phenomena of improperly designed stationary furnaces, increased duration of melting, increased fuel consumption and waste of metal.

Also, a major disadvantage is the lack of vazhmoch: to regulate, the back pressure in the working space of the furnace due to the absence of exhaust gas; the channel and the gate located in it at stationary furnaces and extremely undesirable from the point of view of labor protection is the ingress of gases off the swords directly into the foundry room. These gases, escaping from the furnace opening, although they fall under the hood of the exhaust ventilation, partially remain in the room, poisoned by the vapors of molten metals contained in them, and in particular zinc oxide vapors.

The proposed rotary melting furnace, according to the inventor, retains all the advantages of rotary furnaces, but is free from their disadvantages.

In FIG. 1 shows a longitudinal vertical section of a rotating melting furnace with a separate combustion chamber; FIG. 2 - an ordinary combustion chamber; FIG. 3-section stove na

the EF lines in FIG. one; Fig, 4 is the same section 8 in a different position; FIG. 5 is a section along the line ABCD in FIG. one.

The furnace has holes Af and N in the front and rear walls. The first hole serves to supply hot gases from a separate combustion chamber K, built either according to the principle of surface burning (Fig. 1) or ordinary (Fig. 2), into the working space of the furnace; the second hole serves to otaoda already exhaust gases from the furnace working space to the exhaust channel -ST.

In order to be able to have sufficient filling of the furnace with metal with sufficiently large Mai N hole sizes at the same time, without fear of metal falling into these holes when turning the furnace, they are located eccentrically with respect to the geometric axis of the cylindrical part of the furnace. Thus, the rotation of the furnace occurs not at point 5, but at point 7 (Fig. 3). FIG. 3 represents the position of the metal at the time of operation of the furnace; FIG. 4 - at the moment of the start of its release 8 the bucket from the outlet (taphole) and which, unlike the furnaces, where it also serves to release gases during the operation of these furnaces, is made small, needed only for the production of metal and during the smelting may be stuck with a stopper made of refractory material so that the gases, at least partially, do not enter the workshop.

Due to the fact that the outlet L is arranged in a known manner as low as possible over the bath, this allows the coldest gases to freely flow into the vertical chimney, from where they are sucked off by this draft pipe, and more

Hot gases — retain in the working space of the furnace.

The furnace is loaded through the loading opening U, which is closed during operation.

At the time of loading the furnace can be turned so that the loading opening Y is located slightly lower than during operation of the furnace. Somewhere on the flue gas exhaust, a gate W is arranged, which makes it possible to regulate the back pressure in the furnace during operation, as is the case in stationary furnaces. Structurally, the eccentric rotation of the furnace can be performed, for example, with the help of sectors Z (Figs. 3 and 4), the center of which coincides with the point T of the intersection of the axes of symmetry of the hole L for the gases to enter the outlet sh. These sectors roll on rollers O. The kiln itself rotates by means of a special mechanism.

The subject matter of the invention.

A rotary smelting furnace with a separate combustion chamber, characterized in that the aperture / L for the entrance of gases from the combustion chamber and the outlet of the gases located in a known manner above the very level of the liquid bath, in order to be able to have sufficient furnace filling with the metal while maintaining the required dimensions of the said holes, are located eccentrically with respect to the axis b of the cylindrical part of the furnace, and the furnace itself is arranged to pivot on sectors Z that are eccentric with the furnace, whose center line passes through the intersection point T axes of symmetry of the hole N.

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