JPS6050130A - Slag-metal separator - Google Patents

Abstract

PURPOSE:To make sepn. and discharge of slag automatic and the sepn. thorough by forming a spout which is formed with discharge ports at both ends and receives a molten metal in such a way that the inclination thereof can be adjusted and providing a gate for separating the slag on the metal discharge port side of the spout. CONSTITUTION:A separating apout 3 is pivotally supported tiltably by means of a stanchion 8 on approximately the central side in the longitudinal direction thereof. A molten metal discharge port 5 is formed at one end and a slag discharge port 6 is formed at the other end. A gate member 4 is attached apart from the bottom of the spout in the spout 3 near the port 5. The tilting device for the spout 3 is constituted by, for example, a cylinder device 7. The molten metal in the melting furnace is thereupon tapped to approximately the central part of the spout 3 from a tap hole 2 of the melting furnace. The slag 14 in the molten metal floats on the molten metal 15 in the spout. The metal 15 flows out through the port 5 by passing underneath the member 4 but the slag 14 is blocked by the member 4 and is discharged through the port 6. The height of the ports 5, 6, i.e., the inclination of the spout 3 is adjusted by the device 7 according to the amt. of the molten metal, the separating condition of the slag and the metal, etc. so that the metal 15 does not flow out through the port 6.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for separating and removing slag (slag) from molten metal melted in a melting furnace such as an electric furnace or a cubera. This invention relates to a slag/metal separation device that continuously or intermittently separates molten metal by utilizing the difference in specific gravity between the two.

For example, when melting iron raw materials, refining, and making steel, 5i0
2. Acidic oxides such as A/go3, CaO9Mg0
Since basic oxides such as sulfur and trace amounts of heavy metal oxides are dissolved in the molten metal as slag, it is necessary to remove the slag after oxidation scouring and before moving to the reduction stage. Conventional slag removal work consists of (a) installing a molten dam at the bottom of the melting furnace;
A slag discharge port and an iron bath discharge port are provided separately in this hot water bath part, and the slag is separated and discharged using the difference in specific gravity.
(b) In an induction electric furnace, due to the difference in specific gravity, slag floats on the top of the molten metal, so the furnace body is tilted and the floating slag is scraped out manually using iron rods, flat iron plates, etc., and slag that does not melt comes out. In this case, the slag is grabbed from the top of the furnace using a grab-bucket type scavenger, or (c) the molten metal is tapped into a ladle, the ladle is tilted, and the slag is scraped out using a spatula. However, both methods require a lot of effort, take a long time to remove the sludge, and often have the problem of not being able to completely separate and remove the sludge.

An object of the present invention is to form a discharge port at both ends of a gutter that receives molten metal, provide a tilting device to adjust the inclination of the gutter according to the amount of molten metal, and further provide a slag separation weir on the metal discharge port side. It is an object of the present invention to provide a small and efficient slag/metal separation device that is capable of automating slag separation and discharge and perfecting the separation by providing members.

Hereinafter, the present invention will be explained by way of examples with reference to the drawings.

Fig. 1 is a schematic front view of the slag/metal separation device according to the present invention, and Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, both of which are during the molten metal tapping and slag separation operations. It is shown in the following state. The separation gutter 3 is pivotally supported in a tiltable manner by a column 8 at approximately the central side in the longitudinal direction, and has a molten metal discharge port 5 at one end and a slag discharge port 6 at the other end. It is formed. A weir member 4 is installed in the separation gutter 3 at a position close to the molten metal outlet 5 and slightly spaced from the bottom of the separation gutter 3. The tilting device of the separating trough 3, which in this embodiment is supported by a tilting cylinder device 7 connected between the column 8 or the column floor 12 and the separating trough 3, can of course be used to move the separating trough around its support point. Any other drive device may be used as long as it rotates. For example, the tilting center shaft 11 itself may be rotationally driven via a gear transmission mechanism.

In such an apparatus, after the material to be melted is melted in the melting furnace 1, the melt @ 13 is discharged from the tap 2 of the melting furnace 1 to approximately the center of the separation gutter 3. In the separation gutter 3, the amount of molten slag 14 floats on the molten metal 15 due to the difference in specific gravity, and the molten metal 15 passes under the weir member 4 and flows out from the metal outlet 5 to the metal ladle 9, but the upper surface Slag 14 floating on
is blocked by the weir member 4 and does not flow to the metal outlet side,
The slag is discharged from the opposite slag discharge port 6 to the slag ladle 11. In this case, in order to prevent the molten metal 15 from flowing out from the slag discharge port 6 together with the slag, the height positions of both discharge ports 5 and 6, that is, the inclination of the separation gutter 3, are adjusted depending on the amount of molten metal, the separation status of slag and metal, etc. is adjusted by the tilting cylinder device 7. As the amount of molten metal in the gutter decreases, the separation gutter 3 is slowly tilted toward the metal ladle 9, whereby all of the molten metal in the separation gutter 3 is discharged to the metal ladle 9. Finally, since slag remains in the separation gutter 3, the separation gutter 3 is tilted greatly toward the slag ladle 10ill by the tilting cylinder 7 to discharge the slag.

According to the present invention, both ends of the gutter are used as discharge ports, a slag weir member is provided on one side, and the slope of the gutter can be adjusted to maximize separation efficiency according to the amount of molten metal flowing into the gutter. Therefore, it is possible to obtain a small and efficient separation device that can effectively separate and discharge metal and slag. There is less heat dissipation and separation can be completed quickly.

[Brief explanation of drawings]

, FIG. 1 is a schematic front view of a slag/metal separation apparatus according to the present invention, and FIG. 2 is a sectional view taken along line II--II in FIG. 1. DESCRIPTION OF SYMBOLS 1... Melting furnace, 3... Separation gutter, 4... Weir member, 5... Metal discharge port, 6... Slag discharge port, 7... Tilting cylinder, 8... Support column,
11... Tilt center axis, 14... Slag, 15...
-Metal. -Multiple Agent Patent Attorney Someyori, Kichi 91 Figure I [-1

Claims (1)

[Claims] A separation gutter that is rotatably supported and has a metal discharge port at one end and a slag discharge port at the other end, and a weir member provided within the separation gutter on the metal discharge port side away from the bottom of the line gutter. and a tilting device for the separation gutter, wherein the inclination of the separation gutter can be adjusted according to the amount of molten metal flowing into the separation gutter from the melting furnace.