SU1062265A1 - Main chute of blast furnace - Google Patents

Abstract

1. THE MAIN CHAIN OF THE DOMAIN STOVE, containing the central channel, is a canal for the removal of pig iron and slag and a trap for the iron, made with the slope in the direction of the central channel and formed for the main slag pass and an additional pass installed at the beginning of the channel for removing the slag the main slag pass and having a channel at the level of the bottom of the iron trap, which is different from the fact that, in order to control the degree of iron trapping from the slag, the upper edge of the additional pass vnogo slag pass. 2. The chute according to claim 1, characterized in that the bottom of the trap for an internal runner is an extension of the bottom of the central channel.

Description

The invention relates to metallurgy, in particular blast furnace production, and can be used to separate the smelting products when they are released from the blast furnace.

The main chute of the blast furnace is known; it consists of a central channel and a chute connected to it through a slag pass for removal of the 11 Clack 11.

However, during operation, in the trough of a known construction, the loss of cast iron with slag reaches 10% of the weight of the bottom slag, in some cases this value can reach 40%. .

Closest to the invention to the technical essence is the main chute of the blast furnace, consisting of a central channel, chutes for the removal of iron and slag, and a trap for iron. The cast iron trap is formed by the main slag pass, and the additional pass, installed before the main one at the beginning of the chute for slag removal, has a bottom slope towards the central channel and is connected to it by a channel made in an additional pass at the bottom of the trap.

In the known trough, the loss of pig iron with slag is somewhat reduced due to an increase in the area of the zone of pig iron deposition from slag. 2 3 However, the degree of separation of pig iron at slag is not high enough.

The purpose of the invention is to increase the degree of capture of iron from slag.

The goal is achieved by the fact that in the main chute of a blast furnace, containing a central channel, chutes for pig iron and slag removal and a bottom trap for pig iron, which is inclined towards the bottom of the central channel, formed by the main slag pass and an additional pass installed at the beginning of the chute for iron drain slag in front of the main slag pass and having a channel at the level of the bottom of the iron trap, the upper edge of the additional pass is located above the upper edge of the main slag pass.

Here, the traps for the cast iron are a continuation of the bottom of the central channel.

FIG. 1 shows the main chute of the blast furnace, in plan; in fig. 2 a section A -A in FIG. one.

The main trench of the blast furnace consists of a central channel 1, adjacent to the tap-hole 2, chute 3 for draining pig iron and chute 4 for draining. At the beginning of trench 3, for the removal of iron, pass 5 was made, and at the beginning of trench 4 for removal of slag — the main b and additional 7 pass, forming a trap. 8 for cast iron.

The bottom of sheep 8 is inclined towards the central channel 1 and is its continuation. At the level of the bottom of the trap 8 in the pass 7 is made channel 9.

The level of the upper edge of the additional pass 7 is higher than the level of the upper edge of the main slag pass 6, c1, which in turn melts the level of the upper edge of the cast-iron pass 5.

Drain channels 10 and 11 are made to completely empty the main gutter from the remains of iron and slag.

The main chute of the blast furnace is operated as follows.

With the release of smelting from tap hole 2 with the start of simultaneous release of iron and slag, the stream fills the central channel 1 to the level of the upper edge of the pass 7, pours over it and falls in a stream into the trap 8. Those who have not settled in the central channel 1 have much smaller drops of iron. The specific gravity of the slag is introduced into the bath of the trap 8 deeper than the slag, and reaches the level of iron, where it is merged with it. The iron flows down along the bottom of the trap 8 into the central channel 1 and then into the chute 3 to drain the iron.

The efficiency of deposition of iron drops depends on the depth of penetration of the jet inside the bath of the trap 8 and is determined by the thickness of the slag layer in it and the height of the jet fall.

Based on this, the slag layer in the trap 8 should be at least 80-150 mm, and the height of the jet fall, determined by the difference in the levels of the edges of the slag passes 5 and 6, should be at least 300 mm.

The invention allows to increase the quantity of captured pig iron, and, consequently, reduce its losses with slag.

Fog. 2

Claims (2)

FURNACES, containing a central channel, a chute for removal of cast iron and slag and made with an inclined to the side 07/24/75 12/23/83. Bull. Number 47 P.Ya. Sorokin 669.162.266.22 (088.8) 1. Copyright certificate of the USSR, cl. C 21 V 7/14, 1963. USSR copyright certificate, cl. C 21 V 7/12, 1971. MAIN TURN OF THE DOMAIN DOMAIN with a pass and an additional pass installed at the beginning of the gutter for the removal of slag in front of the main slag pass and having a channel at the bottom of the trap for cast iron, with respect to cast iron from slag, the upper edge of the additional pass is located above the level of the upper edge of the main slag pass. 2. Gutter pop. 1, characterized in that the bottom of the trap is for> IC