JPS6210204A - Flow passage change-over type device for pouring molten iron by tilting - Google Patents

Abstract

PURPOSE:To decrease the generation of dust during tapping in the stage of alternately pouring the molten steel from a blast furnace to two systems of ladles by providing a rotary trough for dividing the molten iron and two stationary inclined spouts under a molten iron spout, decreasing the head therebetween and covering these devices with hoods. CONSTITUTION:The molten iron flowing out of a tap hole of the blast furnace is received into the molten iron spout 4 and is dropped into the turning spout 11 which is then turned. The molten metal is further equally divided by the stationary inclined spouts 12, 13 and are alternately poured into two systems of molten iron ladles 6, 6. The head between the molten iron spout 4 and the turning spout 11, the head from the spout 11 to the stationary inclined spouts and the head between the top end of the stationary inclined spouts 12 and the top end of the ladles 6 can be decreased and the amt. of the dust to be generated by the dropping and pouring of the molten iron is decreased. The part above the ladles 6 is sealed by the hood 17 and the part above the spout 4, the spout 11 and the spouts 12 from the tap hole of the blast furnace up to the ladles 6 is sealed by the hood 16, by which the amt. of the air to be intruded into the molten iron during the dust collection is prevented and the capacity of a dust collector is made smaller.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flow path switching type hot metal pouring device for pouring hot metal into a hot metal container.

As shown in Fig. 4, the hot metal tapped from the blast furnace 1 passes through nine large gutter 3 provided in the vestibule 2, and after separating the slag, it passes through the hot metal gutter 4 and is injected into the hot metal ladle, which is the hot metal container 6. It is then transported to a converter. In this case, hot metal container 6
Since the capacity of 7.7 is small compared to the amount of pig iron tapped,
A plurality of hot metal containers 6 are prepared above, and by swinging the rocker 5 to move the hot metal from the hot metal trough 4, the hot metal flow path is switched from side to side as shown in Fig. Hot metal is injected into C. Since the hot metal falls from the hot metal trough 4 to the rocker 5 with a drop and is injected into the hot metal container 6λ, a large amount of dust is generated, so a dust collection hood 8 is provided above the hot metal container 6 and the rocker 5. It is sucked up by a dust collector.

However, in the above conventional structure, in order to move the rocker 5,
The opening between the rocker 5 and the hot metal container 6 was inevitably large, such as a gap, and the amount of suction air required to prevent one dust from being emitted was extremely large.

As a result, there were problems such as a decrease in the temperature of the hot metal and an increase in the electricity cost of the dust collector.

The object of the present invention is to provide a hot metal pouring device that can solve the above-mentioned problems.

The flow path switching type hot metal tilting device of the present invention includes a rotating gutter for switching the hot metal flow path that is connected to a hot metal gutter in the blast furnace vestibule, and a fixed structure that guides the hot metal whose flow path has been switched by the rotating gutter to a hot metal container. The rotary gutter, the fixed inclined gutter, and a dust collecting hood that covers the hot metal container are provided.

An embodiment of the present invention will be explained below with reference to the drawings.

In the figure, reference numeral 11 designates a rotating gutter for switching the hot metal flow path connected to the hot metal gutter 4 by means of a rotating mechanism (not shown), so that the position of its outlet 11m can be moved by about 90'. The rotating gutter 11 is provided adjacent to the bottom surface of the hot metal gutter 4 in order to reduce the head from the hot metal gutter 4. 12 is 1
The hot metal whose flow path has been changed by the rotating gutter 11 is transferred to the hot metal container 6.
Two fixed inclined troughs are provided so that hot metal can be injected into the hot metal containers 6, 6 on the a-paths 7, 7. In order to reduce the head of the hot metal, this fixed inclined gutter I2 has its base end adjacent to the bottom surface of the outlet 11 of the rotary gutter, and its tip end is attached to the container 6 within a range that does not interfere with the movement of the hot metal container 6. It is arranged adjacent to the above and inclined. I5 is a dust collection hood,
A hood 1# that covers the rotating gutter 11 and the fixed slope @II that prevent air from entering from above, a hood 17 that covers the hot metal container 6, and a rotating gutter and fixed slope that prevent as much as possible the air from entering from below. Lower cover 1 installed under the gutter etc.
8, a cover 19 provided around the hot metal container 6, and a track 7
, 7, and the like. In this case, since the inclined gutter 12 for pouring hot metal is fixed and the gutter 11 for switching the flow path is also rotatable, the upper and lower sides of these can be sealed relatively easily.

The flow path switching type hot metal tilting device of the present invention is as described above, and since the head difference when the hot metal falls between each transom is made as small as possible, the amount of dust generated can be reduced. Additionally, since the rotating gutter and fixed inclined gutter can be easily sealed, the amount of air entrained during dust collection can be reduced. Therefore, since the amount of suction air for preventing dust generation can be reduced, the drop in temperature of the hot metal can be reduced, and the power cost of the dust collector can be reduced.

[Brief explanation of the drawing]

FIG. 1 is an overall explanatory diagram of the present device, FIGS. 2 and 3 are front and side views showing one embodiment of the inventive device in use, and FIG. 4 is an overall explanatory diagram of the conventional device. FIG. 5 is an explanatory diagram of the usage state of the conventional device. 2...Vestibule, 4...Hot metal gutter, 6.-Hot metal container, 11
...Rotating gutter, 12--Fixed inclined gutter, 15-...Dust collection hood. Applicant's Representative Patent Attorney Takehiko Suzue Figure 2 Figure 4 Figure 5

Claims (1)

[Claims] A rotating gutter for switching the hot metal flow path connected to the hot metal gutter in the blast furnace vestibule, a fixed inclined gutter that guides the hot metal whose flow path has been switched by this rotating gutter to the hot metal container, and the rotating gutter and the fixed inclined gutter. and a flow path switching type hot metal tilting device comprising a dust collection hood that covers the hot metal container.