SU1222680A1 - Device for separating cast iron and slag - Google Patents

Description

one

The invention relates to ferrous metallurgy, in particular to devices of the main trough of a blast furnace,

The aim of the invention is to increase the degree of separation of iron from slag.

FIG. 1 shows the arrangement of the troughs of a casting yard with two cast-iron tap-holes; FIG. 2 is a section A-A in FIG. 1 o

The device contains at least two main gutters 1 and 2 adjacent to the iron notches of the blast furnace 3. Each main gutter 1 or 2 is equipped with a skimmer 4 or 5, a pass 6 or 7 for the cast iron and a pass 8 or 9 for the slag. At the level of the main chute day 1 or 2, an interstitial line 6 or 7 for cast iron and a skimmer 4 or 5, an opening 10 or 11 is made to release the cast iron from the main chute 1 or 2 into the cast-iron couches (not shown) along chutes 12 or 13. 7 and 6 for cast iron are adjacent gutters 14 and 15 for removal of cast iron into the cast iron ladles. Swing grooves (not shown) are installed under the drain toes of the gutters 14 and 15 for casting iron into iron-body ladles. For passes 8 and 9 for slag prim: ayut troughs 16 and 17; which then merge into one trough 18, and then again, go to two troughs 19 and 20, through which slag is fed to the slag processing unit 21. On the slag chute 20, a trap 22 for the Chun Gong is installed; it can also be installed on the chute 19), consisting of a side skimmer 23, the opening of which is ... filled to the full width of the skimmer plate, additional pass 24 for cast iron and toe 25, which suit the container 26, lined to the desired shape and size of the ingots. The trap 22 is complete (FIG. 2 of the metal frame 27, carbon blocks 28 and refractory packing 29. The slag, completely cleaned from iron, is fed through the grooves 3 or 31 through passes 32 or 33 to the 21 slag processing unit 21. To release residual cast iron and the slag from the trap 22, after the product has been melted from the furnace, a hole 34 is provided at the bottom of the trap 22 and a bypass chute 35.

The device works as follows.

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The production of smelting products from blast furnace 3 is carried out alternately through cast-iron tap-holes. With the release of products melting through a single cast iron

 The second iron hole is closed. Nascheimer, cast iron and slag from blast furnace 3 enter the main chute 1, where they are separated. Cast iron passes under the skimmer 4 and through

A jg pass 6 for the cast iron along the chute 14 enters the swinging chute and then into the cast iron ladles. During the release of smelting products through a cast-iron tap hole, hole 10 in the main

The jg of groove 1 is clogged with a refractory mass, which overlaps the overflow groove 12. at the same time, it is retained by the skimmer 4 and through the pass 8 for slag through the grooves 16, 18 and 20 is fed into 22 for cast iron. At this time, the troughs 17 19 and 31 are separated from the slag path by a refractory mass. Particles of cast iron, rendered by slag, and: from 1 to the main 1 through slag

; ig pass 8 of chute 16 and 18 in slag chute 20, settle to its bottom, separate from slag, and, overgrow into a metal stream under a layer of slag, enter the catch;, t11ku 22, captured cast iron prog; single under side skimmer 23 the opening of which is made for the entire width of the skull plate Skim1 and through an additional pass 24 for cast iron and a sock 25 enters lined containers 26 made to the desired shape and size of ingots. At the same time, the slag is retained by a skimmer 23 and passes through passes 32 and 33 along gutters 30 or 31 for installation 21 and. After closing the iron notch in the main gutter 1, the cast iron and lacquer remain, which are removed by means of the aperture 10 and the gutter 12 in a known manner. Slag and cast iron, remaining in the trap -22, are poured into special tanks 26 through the opening 34 and the bypass chute 35, Hole 34 at the time of the cast iron and slag clogging with a refractory mass. Due to the fact that the cast iron and donkey statuses in the trap 22 are not large, the container 26 with them is easily transferred by the casting yard and pours out into another working main chute. Then, the described 5th cycle of operations is repeated with reference to main chute 2.

The operation of the proposed device is possible when installing one trap30

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ki on two tap holes, but this does not exclude the installation of traps for cast iron on the slag grooves for each tap hole.

The proposed apparatus for the separation of iron and slag can also be used on blast furnaces with a round casting yard and four cast-iron tap holes. The device has the greatest positive effect on high-volume blast furnaces with the most tons of iron castings. .

The invention makes it possible to completely exclude the ingress of cast iron into the mouth of 226804

home slag granulation, thereby reducing the cost of repairing them by 50-60% and ensuring their stable operation. The main advantage of the device is the complete extraction of pig iron from slag. Additionally, the captured cast iron will amount to more than 100 thousand tons per year for a blast furnace of 5000 m. The simplicity of the design of the trap, taking into account the listed advantages, allows the invention to be applied to most of the existing blast furnaces.

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P "edaktor T. Kugrpeva

1669/24 Circulation 552. Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, Proektna St., 4

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Compiled by B. Rakovsky

Tehred I.Popovich Proofreader I.Erdeyi

Claims (1)

(£ 7) DEVICE FOR SEPARATING THE IRON 'AND SLAG, containing two or more main channels with skimmer plates, slag discharge channels with traps, passes for cast iron and slag, a channel for draining residual iron from the main channel, characterized in that, in order to increase the degree of separation of cast iron from slag, the trap on the slag discharge chutes is equipped with a side skimmer plate with a pass made in the form of a drain sock, under which there is an auxiliary removable