KR20010002534A - main through runner for protecting mixing Fe of slag in blast furnace - Google Patents

Abstract

PURPOSE: A runner for preventing hot metal from flowing into blast furnace slag is formed by installing dam into the runner to reduce flow rate to result in extensive residence time of the hot metal within the runner. CONSTITUTION: A runner apparatus is operated by separating hot metal and slag in a runner having a skimmer (3), discharging such hot metal through an outlet and has a dam (7) hollowed on its lower part, which is attached near inflow area of the runner. The skimmer serves to separate the hot metal and the slag based on the difference of specific gravities therebetween. Also, a hollowed pore, at lower part of the dam, through which the molten iron can be passed. The dam is preferably installed at lower part of a slag zone (4). The slag zone is positioned at a point higher than upper part of a metal zone (6).

Description

Main through runner for protecting mixing Fe of slag in blast furnace}

The present invention relates to a device for preventing the mixing of molten iron in slag discharged from the blast furnace, and more specifically, by installing a dam (dam) in the large hot water apparatus for separating the molten iron and slag with a specific gravity difference The present invention relates to a device suitable for preventing the mixing of molten iron in the slag by lowering the flow rate of the gas and lengthening the residence time in the runway.

The melt discharged from the blast furnace consists of molten iron and slag, and the melt is continuously discharged through the outlet 1 of the blast furnace as shown in FIGS. 1A and 1B (24 hours). The melt is separated from the skimmer (Skimmer) of the large hot spring (2) by the specific gravity difference (melting line: 7.2, slag: 2.3), the slag in the slag zone (4) 5) (排 滓 口) and the molten iron in the molten metal zone (6) (metal zone) flows out through the skimmer (3).

The molten iron separated from the large hot water skimmer is transferred to a steelmaking process which is a later process. The slag is then sent to the dry pit along the flow path of the slag water supply to the dry pit process and to the water treatment equipment to produce the hand goods. When water is injected into (5) and the water is sprayed on the reporting equipment, slag is crushed by the water pressure, stirred in the water stirrer, transferred to dehydration, and dehydrated to produce the product.

If molten iron (Fe) is mixed in the slag flowing into the discharge hole (5), not only the quality of the hand product is reduced but also the molten iron mixed in the slag is exploded when water is sprayed for cooling the slag at a high temperature. Incorporation should be prevented.

However, in the above-mentioned conventional large baths, the level of the outlets has been adjusted to prevent the incorporation of Fe into the slag, but the separation of molten iron and slag in the large baths is not smooth due to operating conditions and erosion of the refractory. There is this.

The present invention is to improve the above-mentioned conventional problems, by installing a dam with a lower through hole in the molten water flowing in the melt flows to increase the residence time in the molten water by lowering the flow rate of the melt It is an object of the present invention to provide a hot water tapping device suitable for preventing Fe mixing in slag by smoothly separating molten iron and slag.

Figure 1a is a side cross-sectional view of a large water flow apparatus for separating the melt and slag discharged from the blast furnace outlet by the specific gravity difference

FIG. 1B is an exhaust sectional view showing slag discharge in FIG. 1A

Figure 2a is a side cross-sectional view of the large tap water apparatus installed dam of the present invention

FIG. 2B is an enlarged side view of the dam in FIG. 2A

Explanation of symbols for main parts of the drawings

2: large bath degree 3: skimmer 4: slag zone

5: Baejae-gu 6: Dragon boat area 7: Dam

8: through-hole

In the present invention for achieving the above object in the molten metal (melting and slag) from the blast furnace in the large turbidity to separate the molten iron and slag in the large hot water is installed skimmer (skimmer) to discharge the slag through the exhaust hole, It is composed of a large water tapping device equipped with a dam of the lower side through which the molten water flows into the large tapping water.

2A and 2B illustrate an embodiment according to the present invention, in which a molten iron flows in the lower part and a skimmer 3 is installed to separate the molten iron and the slag into a specific gravity difference, and the slag outlet 5 is provided. In the large hot water supply system, a large hot water supply system is provided in which a dam 7 (dam) having a lower side through hole 8 is provided at the beginning of the inflow of the melt.

In installing the dams 7 and dams, the dam 7 having the through hole 8 through which the molten iron can flow is formed, and the height of the dam is the molten iron zone forming the boundary between the slag zone and the molten iron zone. It is preferable to install on the lower side of the slag zone 4 which is higher than the upper side of the metal zone.

When the melt tapping from the blast furnace flows into the large bath with the dam 7, the melt hits the dam 7, thereby lowering the flow rate and lengthening the residence time in the large bath, thereby facilitating separation of molten iron and slag. The slag accelerated in this way moves toward the skimmer, and the molten iron moves through the hole through the lower side of the dam. The melt thus transferred is separated again from the skimmer and the slag flows out through the drain.

Therefore, the separation between the slag and the molten iron is promoted by installing a dam as compared to the conventional installed only the skimmer as shown in FIG.

As described above, the present invention improves the quality of the water product by preventing Fe from being mixed in the slag flowing into the drainage port due to the dam installed in the water bath, thereby improving the quality of the water product, and preventing the risk of molten iron explosion due to the water spray on the water material. Can produce handmade products.

As described above, the present invention installs the dam 7 in the large turret which separates the molten iron and the slag by the skimmer, so that the melt melted from the blast furnace is lowered in the flow rate as it hits the dam 7 and thus the interior of the large turbidity. By increasing the residence time in the molten metal, the separation of molten iron and slag is promoted, thereby preventing the incorporation of Fe into the slag, thereby improving the quality of the water product, and preventing the risk of molten iron explosion due to water spraying on the water. Can produce handmade products.

Claims (2)

In the large baths, which have a skimmer installed for discharging the molten melt (melting and slag) from the blast furnace into molten iron and slag, the bottom of the molten water flows into the first entrance. A molten metal mixing prevention block of blast furnace slag characterized by the fact that a dam (7) (dam) is installed. The method of claim 1, The lower side of the dam (7) (dam) has a through hole (8) through which the molten iron can flow, and the height of the dam is higher than the upper side of the molten metal zone (6) forming the boundary between the slag zone and the molten iron zone. A molten metal mixing prevention block of blast furnace slag, characterized in that it is installed up to the lower side of the slag zone (4) in the position.