KR890000383Y1 - Apparatus which prevent to enter the melted iron in the slap of blast furnace - Google Patents

Abstract

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Description

Melting line prevention device in blast furnace slag

1 is a longitudinal cross-sectional view of a conventional large bath.

2 is a plan view of the present invention.

3 is a longitudinal sectional view of the present invention.

Figure 4 is a cross-sectional view A-A 'of the present invention.

5 is a perspective view of part B of FIG.

The present invention relates to an apparatus for preventing molten iron mixing in blast furnace glass that efficiently and economically recovers molten iron in slag discharged from the blast furnace.

In general, the molten iron discharged from the blast furnace is separated from the forgiveness by using a specific gravity difference in skimmer through the large hot water, and the molten iron flows to the molten iron and the slag to the slag water. Speed, distance from the exit to the skimmer, depth of the run and slag fluidity are affected.

Conventionally, to recover the mammary gland by installing a pit or ladle in the middle or the end of the slag to recover the mammary gland in the slag, the amount of the mammary gland cannot be detected, so a certain amount is more than the amount of recovery. Although there was a difficulty, it was difficult to separate the wires due to the inefficiency and the slag temperature.

In addition, when the molten iron is mixed in the slag, there is a problem that it is now attached to the slag tangle or difficult to process the aggregate, and there is a risk that the mixed molten iron flows into the water stirring tank and causes a large explosion accident.

Referring to the conventional method according to Figure 1 as follows.

The molten iron and slag from the blast furnace exit (1´) are separated from the large bathway (9´) by the middle wheel, and the upper slag goes out to the slagtangdo (6´) and the molten iron passes through the lower exit of the skimmer (8´). The molten iron flows into the molten iron (5 '), but the molten iron is easily mixed into the slag because the molten iron flows out of the large molten metal (9') without any time for sufficient separation of the hot wire and slag. It is mixed and degrades the quality of the molten iron.

The present invention is devised to solve the problems as described above, if attached to the drawing according to the attached oval separation tank (2) installed to promote the separation of the molten iron and slag in the middle of Daetangdo (9). Shielding device (3) installed at the inlet of the separation tank (2) to lower the flow rate of the molten iron and slag. Between the partition (4) separating the large bath (9) and the slag bath (6) and the slag bath (6) between the bottom and the wire pit (7) to recover the streamline in the slag connected to the large bath (9) Unexplained reference numeral 1 is the exit port, 5 is the molten iron bath and 8 is the skimmer.

The shielding device (3) installed in a streamlined type in the separation tank (2) is made of Sic and carbon-based materials (alumina: 7, Sic: 2, carbon: 1) based on alumina, which is wear-resistant and heat-resistant. ) Is made of the same material as the shielding device (3), and its height is set slightly higher than the level where the molten iron and slag coexist in the large bath (9). The bottom height of the slag tumbler 6 was set slightly higher than the height of the partition 4 so as to be separated and recovered from the slag tumbler 6 and to prevent molten iron from flowing into the slag tumbler 6.

When explaining the operation of the present invention based on the above configuration, the molten iron and slag flow rate from the exit port (1) is 0.14m / sec, the central flow is blocked by the shielding device (3), the flow rate is lowered while the flow path (流 路) In the separation tank (2) in which) is expanded, it is easy to separate the molten iron and the slag with a stable flow rate of 0.06 m / sec, and the slag is discharged into the slag trough 6 through the upper part of the separation partition 4 and slag. The molten iron, which had not been completely separated, was separated by a specific gravity difference from the streamlined feet (7) installed at the inlet of the slag bath (6) and automatically bathed the bottom of the separation partition (4), which was formed with the large bath (9). 9 is discharged to the molten iron bath 5 through the bottom of the skimmer 8.

As described above, since the molten iron and the slag are stabilized by the separation tank 2 and the shielding device 3, the molten iron and the slag can be sufficiently separated from the conventional method, and are located close to the exit port 1. By installing the wire pit 7, the flowability of molten iron and slag is good, and the slag can be easily separated from the molten iron, thereby increasing the recovery rate of the molten iron, and the molten iron accumulated in the wire pit 7 is automatically returned to the large bath 9. It does not require separate recovery work by flowing in and reduces slagging action of slag tangle (6) and prevents molten iron in the blast furnace slag, which can prevent explosions due to molten iron in the reprocessing of slag. Device.

Claims (1)

An elliptical separation tank (2) is formed in the middle of the large bathway (9), and the inlet of the separation tank (2) forms a shielding device (3) to inlet the slag waterway (6). Part of the blast furnace slag in the blast furnace slag is provided by the partition (4) and wired feet (7).