SU118752A1 - Apparatus for accumulating liquid slag blast furnaces in the production of slag wool - Google Patents

Description

Apparatuses for accumulating liquid slags of blast furnaces in the production of slag wool are known, made in the form of a horizontal furnace heated from above and filled with liquid slag, equipped with a bottom plate and blowing chambers with slit tap holes for slag production.

However, these devices did not maintain the required temperature of the liquid slag due to the cooling of the furnace from the hearth side.

The present invention relates to the same devices and is intended to prevent the cooling of liquid slag in the furnace from the side of the hearth. This is achieved by the fact that under this furnace it is provided with a threshold located along the height to the lower level of the tap hole and forming a bath of liquid slag on the floor. This bath maintains the temperature of the molten slag entering the furnace as a starting material for production while protecting the furnace hearth.

In this device, the liquid slurry chambers are arranged in the furnace branches separated from the space by the last vertical refractory partition with slag by-pass ports.

FIG. 1 shows a device in horizontal section, a plan view; in fig. 2 sections on AA in FIG. one; in fig. 3 is a section through BB in FIG. one; in fig. 4 is a section along the explosive in FIG. one.

The device consists of a horizontal furnace /, the walls of which have a smooth transition to the branches of the furnace forming the blowing chamber 2. The walls of the furnace are lined with chromo-magnesite and insulated with diatom bricks. Under the furnace, it is provided with a threshold 3, located in height to the lower level of the slotted notches 4 and forming a bath for the layer 5 of liquid slag.

Slag is drained into the furnace through the cast iron chute 6, and gases are removed from the furnace through the same chute and channel 7.

The inflation chambers are separated from the furnace space by a vertical refractory partition 8, in which windows 9 are arranged to bypass the liquid slag.

No. 118752-2 -

In order to maintain the temperature of the slag during the inflation period (in order to compensate for the heat loss of the furnace), it is envisaged to use it as in the furnace itself; so in the chambers of the blowing of fuel oil nozzles or gas burners 10.

The use of an overhead furnace of a bath with liquid slag allows the desired temperature of the liquid slag to be maintained, as a starting material for production, for the entire period of inflation and to significantly lengthen the service life of the hearth (in fact, it becomes indestructible).

Subject invention

Claims (2)

1. A device for the accumulation of liquid blast furnace slags in the production of slag wool, made in the form of a horizontal furnace heated from above and filled with liquid slag, equipped with protected hearth and blowing chambers with slit tap holes for the production of slag, characterized in that in order to prevent liquid cooling slag in the furnace from the hearth side, the latter is equipped with a threshold located in height to the lower level of the tap hole and forming a bath of liquid slag on the bottom to ensure the temperature of the incoming furnace s liquid shlak while protecting the furnace. 2. The form of the apparatus according to claim 1, characterized in that the chambers of the blowing up of liquid slag are arranged in the branches of the furnace, separated from the space by the last vertical refractory partition with the bypass windows for the slit.