JPH0120062Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to the structure of a ladle in which a reservoir section having a reservoir chamber for accommodating additives is provided at the bottom of the ladle body.

(Prior art) For example, a ladle for producing spheroidal graphite cast iron consists of a ladle main body and a reservoir at the bottom of the ladle, and a reservoir for producing spheroidal graphite cast iron is placed inside the reservoir formed in the reservoir. Add the appropriate amount of additive (magnesium alloy pellets) according to the desired amount, spread an appropriate amount of waste iron (iron scrap) on top of the additive,
A cover material is formed to achieve the desired reaction rate (generally slowing the reaction rate). By pouring molten cast iron (hereinafter referred to as "raw material molten metal") into such a ladle body, the raw material molten metal and additives are caused to react at a constant rate with the intervention of the husker, and the desired spheroidal graphite is produced. Cast iron (hereinafter referred to as "product molten metal")
That's what it means. ) is manufactured.

By providing the above reservoir, the raw molten metal and additives react directly, so as is well known, the temperature drop of the molten metal after the reaction is reduced, and moreover, it is possible to pour the molten metal immediately. We are working to improve the quality of our products (spheroidal graphite cast iron).

(Problem to be solved by the invention) By the way, when various desired products are manufactured using the same ladle, the addition rate of magnesium alloy may be changed between the products. In such cases, as mentioned above, the reservoir is either too large or too small for the amount of magnesium alloy added, making it impossible to ensure a smooth reaction between the raw molten metal and the additives, resulting in poor product quality. Variations in quality occur.

In addition, in the ladle structure described above, when the reaction between the molten metal and the additive is repeated in the storage section, slag adheres to the inner wall of the storage chamber, and the capacity of the storage chamber in which the additive is stored gradually decreases. However, since the size of the storage chamber is not appropriate, the quality of the product also varies.

Furthermore, slag floats on the molten metal after the above reaction,
Since the slag is mixed into the poured molten product, the quality of the product also varies.

This invention was made in view of the above-mentioned disadvantages, and the purpose is to provide a ladle structure that can prevent variations in product quality.

(Means for Solving the Problems) In order to achieve the above object, this invention makes a storage part having a storage chamber for storing additives detachable from the ladle body, and A pouring passage is opened in the middle part of the ladle body, and the upper wall of the opening in the ladle body is used as a slag dam, and the outlet at the tip of the pouring passage is almost the same as the molten metal receiving opening in the ladle body. It is characterized by being set at a level.

(Function) According to this invention, the pouring passage is opened in the middle part of the ladle in the vertical direction, and the slag damming part is formed in the upper part of this opening. The opening is located below the upper surface of the molten metal in the main body, so that the slag floating on the molten metal is dammed up by the slag damming part. Therefore, it is possible to prevent the slag from being mixed into the poured product molten metal.

Furthermore, since the reservoir is detachably attached to the ladle body, even if slag accumulates in the reservoir, the slag can be easily removed. Therefore, the capacity of the reservoir containing the additive can be kept as constant as possible.

Furthermore, since the storage section can be replaced, a storage chamber with an appropriate capacity can be installed according to the required amount of additive. Therefore, smooth reaction between the raw material molten metal and the additive can be ensured.

(Example) An example of this invention will be described below with reference to the drawings.

FIG. 1 shows a ladle for manufacturing spheroidal graphite cast iron, and this ladle includes a ladle body 1 for receiving raw material molten metal C, and a reservoir 2 provided protruding from the bottom of the ladle body 1. The storage section 2 consists of
It has a storage chamber 11 for accommodating the additive A that reacts with the molten metal C.

The ladle main body 1 has a cylindrical peripheral wall portion 4 having a molten metal receiving port 3 formed in the upper portion thereof, and a pair of round side wall portions 5 on the left and right sides as shown in FIG. The ladle main body 1 is made of steel and has a refractory (not shown) attached to the inner periphery of the ladle body 1 as a whole.

As shown in FIG. 1, the ladle main body 1 has a spout section 8 projecting from the front part of the peripheral wall section 4 on the pouring side, which has a spout passage 6 and a molten metal spout 7. The base end of the pouring passage 6 opens at the middle part of the ladle in the vertical direction, and a slag damming part 15 is formed by the upper wall of this opening. As shown in FIG. 3, this slag damming part 15 dams up the slag D floating in the molten metal C1 after the reaction while the ladle is tilted forward to pour the molten metal and reach the final tilted position. It serves to prevent the liquid from being guided into the spouting path 6 from the opening.

Furthermore, the molten metal spout 7 is formed at the tip of the spout passage 6, and is set at almost the same height as the molten metal receiving port 3 in the ladle body 1. Note that 9 is a support leg provided at the bottom of the ladle body 1.

On the other hand, at the bottom of the ladle body 1 near the rear,
As shown in FIG. 1, a communication hole 10 is formed, and the storage section 2 is removably attached to the ladle body 1 so that the upper end opening 11a of the storage chamber 11 is aligned with the communication hole 10. be. In other words, the ladle body 1
With a joint (refractory mortar material) 12 interposed between the bottom part of the storage part 2 and the top surface of the storage part 2, the storage part 2 can be attached and detached via each flange 13 and a fitting 14.

Note that, as shown in FIG.
is used separately as an additive reservoir.

In the above configuration, the additive (magnesium alloy pellets) A is placed in the storage chamber 11 shown in FIG.
A reaction is carried out by introducing the molten metal C into the ladle body 1 through the molten metal receiving port 3.

Here, the pouring passage 6 was opened in the middle part of the ladle in the vertical direction, and the upper wall of this opening was used as the slag damming part 15, so that the molten metal C1 after the reaction shown in FIG.
At the time of pouring, the opening is located below the upper surface of the molten metal C1. In other words, in the normal posture of the ladle body 1 as shown in Fig. 1,
The slag damming part 15 is located sufficiently lower than the molten metal spout 7. Therefore, as shown in Figure 3,
While pouring hot water by tilting the ladle forward and reaching the final tilted position,
The trajectory of the upper surface 16 of the molten metal C1 after the reaction is always located above the lower end of the slag damming part 15, so that the slag D floating on the molten metal C1 is dammed by the slag damming part 15,
It is prevented from being introduced into the dispensing channel 6. As a result, it is possible to prevent the slag D from being mixed into the product molten metal, thereby eliminating variations in product quality.

Furthermore, since the storage section 2 is made detachable from the ladle main body 1, even if the slag D accumulates on the inner wall of the storage chamber 11 due to repeated thermal reactions within the storage chamber 11, the storage section 2 Part 2 ladle body 1
The slag D can be easily removed by removing it from the slag D.
Therefore, the volume of the storage chamber 11 containing the additive A can be kept as constant as possible, so that the volume of the storage chamber 11 matches the initial purpose, and there is no variation in product quality. As a result, it is possible to obtain a product containing additive A in an appropriate weight %.

Furthermore, since the storage section 2 can be replaced, the storage chamber 11 has an appropriate capacity according to the required amount of additive A.
can be installed. That is, the weight percentage of additive A may vary between different types of products.
Here, in this invention, since the storage section 2 can be replaced with a new storage section 2 having a different capacity, the molten metal C
A smooth reaction between the additive A and the additive A can be ensured, and therefore variations in product quality can also be prevented.

In addition, in the pair of storage chambers 11 in FIG. 2 above, if one of the storage chambers 11 becomes unsuitable for use due to any of the reasons mentioned above, the other storage chamber 11 can be used as a new one with the attached state. It goes without saying that the storage section 2 may have only one storage chamber 11.

(Effects of the invention) As described above, according to this invention, since the storage part is made detachable from the ladle body and the slag dam is formed in the ladle body, the poured molten metal can be It is possible to prevent the above slag from getting mixed in, and also to keep the capacity of the storage chamber containing the additives as constant as possible, as well as to ensure a smooth reaction between the raw molten metal and the additives, resulting in variations in product quality. can be prevented from occurring. Therefore, it is possible to improve the quality of the product.

[Brief explanation of the drawing]

Fig. 1 is a central cross-sectional side view of a ladle showing an embodiment of this invention, Fig. 2 is a sectional view taken along the - line in Fig. 1,
FIG. 3 is a central cross-sectional side view of the ladle showing the pouring state. DESCRIPTION OF SYMBOLS 1...Ladle body, 2...Storage part, 6...Pouring channel, 7...Molten metal spout, 11...Storage chamber, 15...
...Slag damming part, C... Raw material molten metal, C1...
Manufactured molten metal, A...additives.

Claims (1)

[Scope of utility model registration request] In a ladle structure in which a reservoir section is provided at the bottom of the ladle body that receives raw material molten metal and has a storage chamber for storing an additive that reacts with the raw material molten metal, the storage section is detachable from the ladle body. , a pouring passage for pouring out the molten metal after the reaction is opened in the vertically intermediate part of the ladle, and the upper wall of the opening in the ladle main body is used as a slag dam; A ladle structure characterized in that the outlet at the tip of the ladle is set at almost the same level as the molten metal receiving inlet in the ladle body.