SU1229227A1 - Device for iron and slag tapping from blast furnace - Google Patents

Description

one

The invention relates to ferrous metallurgy and can be used in the production of smelting products from a blast furnace.

The purpose of the invention is to increase the degree of separation of iron and slag.

Figure 1 shows the main blast furnace chute, plan; figure 2 - section aa in figure 1.

In the main trough 1, a main skimmer plate 2 is installed. At the junction of the slag trough 3 with the main chute 1, an additional semi-partition 4 is installed, suspended by means of flexible connections 5 on the tilt-rotor 6. In an idle state, the additional semi-partition 4 takes the position I (figure 1).

The device works as follows.

At the normal production rate of smelting products from the blast furnace (6-7 t / min), they fall into the main chute 1, where they are separated by density. At that, the additional semi-partition 4 under the influence of the flow deviates and occupies position II (Fig. 1 ). The intermediate layer of the stream of melting products, when meeting with the additional semi-partition 4, changes its direction of movement in the horizontal plane and deviates to the opposite wall of the main trough 1, then the stream passes through 5

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29227

falls into the space bounded by the walls of the main gutter 1, the main skimmer plate 2 and an additional semi-partition 4. Due to the reflection of the flow from the wall of the main gutter 1, the tangential component of speed arises in this space, the flow acquires a rotational motion, which contributes to the improvement of the conditions for the separation of cast iron and pshaka

With an increase in the rate of release of melting products to 10–15 t / min, the pressure of the flow to the additional section 15 increases and it deviates to position III (Fig. 1)

After the cast iron port is closed, the additional semi-partition 4 is removed from the main trough 1 with the help of a tilt-up device 6 in order to remove more residues of liquid smelting products from the main trough. After the necessary repair and cleaning of the main gutter 1

25, from the solid remains of cast iron and pshak, an additional semi-partition 4 is lowered into the main trough 1.

On blast furnaces of 3200 m, the average loss of pigs with a donkey is about 20 thousand tons per year. The use of the proposed device provides a reduction in the loss of iron in scrap by increasing the efficiency of the separation of fine droplets of iron (about 0.5 mm) from

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Yeshaka by about 20%,

Shleh Iron

Editor N. Yatsola

FIG g

Compiled by V. Chernov

Tehred N. Bonkalo Proofreader A., Zimokosov

Order 2419/22 Circulation 552Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-355, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

DEVICE FOR RELEASING PIG IRON AND SLAG FROM BLAST FURNACE, co. holding the main chute and the slag chute adjacent to it, the main skimmer plate, an additional half-wall located at the junction of the slag chute with the main chute, characterized in that, in order to increase the degree of separation of cast iron and slag, the additional half-wall is suspended on flexible connections. b'o