JPS6039152Y2 - Insulating lid for molten metal containers - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of a heat-insulating lid for a molten metal container such as a casting pot in a steel factory, and the container is tilted after casting to remove molten slag from the bottom. This is to prevent slag that sometimes naturally falls from coming into contact with the heat insulating lid and significantly reducing its useful life.

It is recommended to cover the casting pot with a heat insulating lid during casting to suppress the drop in temperature of the molten steel inside the pot, and to cover the casting pot with a heat insulating lid to suppress the drop in internal temperature even when the slag is being discharged after casting. , which is necessary from the perspective of energy conservation and is already well known.

Furthermore, it is also practiced in some cases to discharge the slag after the completion of casting, without completely removing the heat insulating lid, but leaving it partially covered.

1 and 2 show the structures of these conventional heat-retaining lids, with FIG. 1 being an example of the former, and FIG. 2 being an example of the latter.

In each figure, a is an elevational view, b is a plan view, and c is an external view showing the state when the casting pot is tilted to drain the molten slag at the bottom.

In each figure, 1 is a casting pot, 2 is a heat-insulating lid, and 2' in FIG. 2 is a rigid joint made by separately dividing a part of the heat-insulating M2, and is fixed to the heat-insulating lid 2 by a hinge 7.

3 is a fixing mechanism for fixing the heat-insulating lid 2 to the casting pot 1; 4 is a monolithic refractory (castable) fixed to the back surface of the heat-insulating lid 1; 5 is a lid hanger; 6 is a pot trunnion; 8 is a lifting hook for tilting the casting pot 1.

However, the heat-insulating lid having the structure shown in Fig. 1 has the problem that molten slag adheres to the castable at the end of the opening of the lid when discharging slag, significantly reducing the service life of the lid. The heat-insulating lid shown in the figure is more convenient for keeping the pot warm when it is empty than the heat-insulating cover shown in Fig. 1, but when the casting pot is tilted nearly 180 degrees at the end of slag removal, the heat-insulating lid shown in Fig. 2 Because the rigid joint 2' is small and the lid 2 is not fully open, the molten slag that naturally falls from the bottom of the pot comes into contact with the lid 2 and the castable of the rigid joint 2', so it is the best in terms of service life. It was not much different from the one in Figure 1, and had the same problem.

The present invention was devised to solve the above-mentioned problems of the conventional heat-retaining lid.

Next, the structure of the insulating lid for a molten metal container of the present invention will be explained with reference to the drawings.

Figure 3 shows an embodiment of the insulating lid of the present invention, in which a is a plan view, b is an elevational view, C is an external view showing the casting pot tilted approximately 90 degrees, and d is an approximate view. It is an external view showing a state where it is tilted to nearly 180 degrees.

In the figure, 11 is a casting pot, 12 is a lid mounting bracket provided on the casting pot 11 for attaching a lid, 13 is a engraftment, and 13' is a side lid, and these two divided lids are It is integrally fixed by a hinge 17, and the engraftment 13 is integrally fixed by the bracket 12 of the casting pot 11 via a hinge 18.

What is important in this invention is that the size of the side lid 13' is at right angles to the radial direction at a position corresponding to I15 to 1/2 of the diameter of the approximately circular lid made up of the engraftment 13 and the side lid 13'. The engraftment 13 has a size that occupies the remaining portion.

14 is a monolithic refractory (castable) fixed to the underside of the engraftment 13 and the side lid 13'; 15 is a lid hanger; 16 is a pot trunnion; and 8 is a hanger for tilting the casting pot 11. It's an upper hook.

Since the insulating lid for a molten metal container of the present invention has the above-described structure, even if it is tilted nearly 180 degrees, which was a problem with the conventional insulating lid shown in FIG.
As shown in Figure d, even when the degree of inclination during tilting is small and gradually increases, the side lid 13' is opened first, and then the engraftment 13 and the side lid 13' are gradually opened. As the temperature increases, castable 1 on the back of each heat-insulating lid 13.13'
No. 4 has no contact resistance and the slag is completely removed.

As a result, compared to the conventional castable heat-insulating lids shown in Figures 1 and 2, which were damaged and required repair after being operated by deer about 100 times, the heat-insulating lid according to the present invention does not need to be repaired after being used about 300 times. could be used for.

As a result, the unit consumption of heat-insulating lids has been reduced, and it has also become possible to reduce the number of heat-insulating lids that are always on hand.

[Brief explanation of drawings]

1 and 2 both show the structure of a conventional heat-retaining lid, in which a is an elevational view, b is a plan view, and c is an external view when the casting pot is tilted. Figure 3 shows the structure of the insulating lid of the present invention, a is a plan view, b
is an elevational view, C is an external view when the casting ladle is tilted approximately 90 degrees, and d is an external view when the casting ladle is tilted nearly 180 degrees. 11... Casting pot, 12... Lid mounting bracket, 13... Engraftment, 13'...
Side cover, 14... Monolithic refractory (castable)
, 15... Lid hanging hand, 16... Trunnion, 17.18... Hinge.

Claims (1)

[Scope of utility model registration request] The roughly circular lid is made up of a rigid abutment that is sized to be divided perpendicularly to the radial direction at a position corresponding to 175 to 1/2 of its diameter, and an engraftment that is large enough to occupy the remaining part. is integrally fixed to the engraftment via a hinge mechanism, and the end edge of the engraftment opposite to the side lid attachment part is integrally fixed to the container via the hinge mechanism. lid.