CS252143B1 - Devices to prevent spontaneous leakage of blast gases from the cupola furnace - Google Patents

Abstract

The problem of the escape of top gas from a cupola furnace for melting slag and basalt in the production of mineral wool is solved. The escape of gases is prevented by providing the furnace hopper with a fitting closure with its upper edge, which is positionally coupled to the furnace loading device, e.g. a skip elevator.

Description

The invention relates to an arrangement for preventing spontaneous leakage of coke gases from a cupola furnace for melting an etruscan and basalt, provided with a vertically adjustable filler neck.

In open water-cooled dome furnaces for melting slag and basalt for the production of mineral wool, where coke is used as the heating handle, the coke gases that are produced during the melting of the charge leave the atmosphere without contamination and contaminate the surroundings. In order to improve the melting process, these furnaces are provided with a vertically displaceable hopper, the position of which determines the level of melt in the furnace and thus serves to control the amount of melt delivered by the furnace.

At the same time, the chute closes the furnace and the coke gases can be well removed from the space between the inner surface of the furnace and the external surface of the chute. Some of the coke gases continue to escape into the atmosphere for ages, as it permeates through the charge layer in the feed throat and freely exits the furnace.

This drawback is remedied by the device according to the invention, characterized in that the chute is provided with an upper edge of the chute, which is positively coupled to the furnace charging device.

The advantage of this solution is the immediate closure of the chute after the charging of the charge, so that the coke gases can only leave the furnace via a dedicated pipe. The leakage of the top gas is thus limited to the necessary time of charging the furnace with the feedstock and fuel charge.

An exemplary embodiment of the device according to the invention is shown in the attached drawing, in which a schematic arrangement of a cupola furnace equipped with this device is shown.

The cupola furnace for melting basalt and etruscan has a lower conical part formed by a double jacket 1 through which the water cooling the melting space fi flows. The upper cylindrical part consists of a steel jacket fi with a lining on the inside. In the central part of the furnace, the furnace is provided with a partition A through which a vertically movable filler neck fits, into which the raw material and fuel are weighed from a landfill by means of a skip lift 6, the carriage of which moves into the upper part of the furnace. The charge Z drops by gravitational force into the melting chamber of the furnace, where the raw material is melted by burning the coke and the resulting top gas accumulates in the space between the furnace wall and the entangled filler neck fi, where

After the emptied carriage * of the skip elevator fi has been driven out of the furnace interior, the chute is closed by a closure fi whose position is coupled and by movement of the furnace charging device.

Claims (1)

OBJECT OF THE INVENTION Device for preventing spontaneous leakage of coke gases from the cupola furnace for melting slag and basalt. provided with a vertically adjustable hopper neck, characterized in that the hopper neck (5) has a positively coupled closure (9) with its upper edge and a furnace charging device.