SU415469A1 - MINE FURNACE FOR MELTING OF COLOR METAL ORES - Google Patents

Description

one

The invention relates to the field of non-ferrous metallurgy, in particular, to devices that are prediagnosed for smelting oxidized or sulphide ores.

A known shaft furnace for smelting non-ferrous metals. However, this oven has several drawbacks:

The construction of the furnace does not provide for the utilization of heat from waste gases, the temperature of which reaches on average 500-600 ° С (for example, during oxidized nickel

ores);

in the metal tubular sections from which the furnace shaft is made, saturated steam is obtained having a limited technical application;

the service life of the furnace is limited by the duration of maintenance-free operation of only one of its elements - the furnace hearth, which significantly reduces the campaign of the entire furnace as a whole;

The furnace is characterized by instability of the thermal mode of its operation, due to seasonal and daily fluctuations in the air temperature around the furnace and the top frame, which causes noticeable fluctuations in the temperature of the smelting products (or costly coke overruns), as well as inconsistency in the internal volume forge

to the deterioration of the condition of separation of melting products and an increase in the loss of non-ferrous metals with slags;

Due to the relatively high temperature of the exhaust gases passing through the top chamber and the near-collocator device, ethn gases have an increased speed and therefore: large amounts of liquids have been removed from the furnace, especially when charging the charge.

The purpose of the invention is to improve heat utilization, to obtain dry steam, increase the service life of furnaces and stabilize its thermal conditions, reduce dust removal and reduce losses of non-ferrous metals with slags, as well as improve working conditions at the furnace top. This is achieved by the fact that the furnace is equipped with a metal tubular coil, laid but the outer walls of the hearth, and 1 ad hinge device is made in the form of a tent made of metal tubular sections, and the coil inlet is connected to a device for separating wet steam from the superheated water below its level in this device, the coil outlet is connected to the downstream manifold, and the tubular sections from which the parotid device is made are connected to a device for separating the wet steam from the superheated water above the water level in

this device.

Ma drawing shows the shaft furnace described.

The furnace includes a furnace / shaft 2, a shaft 3 made of metal tubular sections 4, an overflow manifold 5 communicating with these sections from below, a collecting manifold 6 communicating with the tubular sections from above, a device 7 for separating wet steam from superheated water, connected to the collecting manifold 6, the flapstick 8, the braking device 9, the metal tubular coil 10, laid on the outer walls of the hearth /, the metal tubular sections 11, of which the braking device 9 is made, and the collecting manifold 12, serving s for removing dry vapor.

When smelting nonferrous metal ores from the device 7 containing superheated water and wet steam in the furnace, overheated water is supplied to the inlet of the coil 10 through the piping, which enters the downcomer 5 through the coil to the outlet of the coil via the pipeline.

From the lowering collector 5, the overheated water is distributed through the metal tubular sections 4, of which slit 3 is made, and, the passage through these sections is transformed into a steam-water mixture collected in the collecting manifold 6 and coming from it through the conduit into the device 7 to separate the wet steam from the superheated water. From device 7, wet steam is piped through the pipeline to tubular sections 11, of which a top plate 9 is made, for which a dispensing manifold can be used. When passing through sections 11, the wet steam overheats due to the utilization of heat from the waste gases and turns into dry steam, which is collected in the collecting manifold 12 and then sent to the consumer.

Subject invention

A shaft furnace for the smelting of non-ferrous metal ores, containing a forge with a bristle, a shaft made of metal tubular sections, communicating with the lowering and modular

collectors, a top chamber, a scraper device and a device for separating wet steam from superheated water, characterized in that, in order to improve heat recovery and to obtain dry steam, to extend the

service of the furnace and stabilization of its thermal conditions, reduction of dust removal and reduction of losses of non-ferrous metals with slabs, as well as improvement of working conditions at the top, the furnace is equipped with a metal coil,

laid on the outer walls of the hearth, the top frame is made in the form of a tent made of metal tubular sections, with the coil entrance communicating with the device for separating wet steam from the superheated

water is below its level in this device, the coil outlet communicates with the downstream manifold, and the tubular sections of the top frame of the device communicate with the device for separating the wet steam from the superheated water above the water level in this device.

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