JPH0544368U - Ladle lid for ladle - Google Patents

Abstract

(57) [Summary] [Purpose] The lid attached to the ladle is fixed to simplify its structure and allow it to be installed where space is limited. When tapping hot water, scrape the slag with a slag dragger etc. Even if it is not discharged, only the hot metal can be poured out excluding the slag. [Structure] A ladle lid 6 having a taphole and a groove is provided with a weir 1 projecting downward from the taphole 5 of a ladle 4 and having an appropriate interval. It is soaked in 3 layers of hot metal through 2 layers, the slag 2 is blocked, and hot metal is poured out.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ladle lid for a ladle that receives molten metal tapped from a blast furnace.

[0002]

[Prior art]

 The ladle that has received the molten metal tapped from the blast furnace is usually transported to the next steelmaking plant, during which the slag that has separated and floated due to the difference in specific gravity is scraped off with a slag dragger, etc. It is moving. While the ladle is transported to the steelmaking plant after the molten metal has been received, the temperature of the molten metal is unavoidably reduced, and the graphite that has precipitated due to the temperature drop dissipates from the ladle, causing environmental pollution. Some have a pan lid to solve this problem and prevent a drop in temperature during transportation.

[0003]

[Problems to be solved by the device]

 Some conventional ladle lids are constructed so that they can be opened and closed.In these cases, they are opened when receiving molten metal from a blast furnace or when transferring molten metal to a mixed-iron furnace, and closed during transportation. However, since the opening and closing is done by a hydraulic cylinder, the structure is complicated, and a certain amount of space is required above and to the side of the ladle to open and close the lid.

The present invention simplifies the structure by fixing the pan lid and enables installation even in places where space is limited, and the fixed lid is for receiving molten metal tapped from the blast furnace. Although it is intended to place a piggy-hole in it, the problem is that the slag cannot be scraped out because the slug dragger does not enter. The present invention has been made for the purpose of solving the above problems that occur when the pot lid is fixed.

[0005]

[Means for Solving the Problems] Therefore, according to the present invention, a weir, which is fixed to a ladle provided with a tap hole and has a suitable gap with the tap hole, is provided on a ladle lid having a tap hole for molten metal. It is a thing.

[0006]

[Action]

 When the ladle is tilted and tapped from the taphole, as shown in Fig. 1, the weir 1 passes through two layers of slag separated and floated due to the difference in specific gravity, and is dipped in three layers of hot metal. As a result, the slag 2 is blocked by the weir 1 and stays in the ladle 4, and the hot metal 3 passes through between the inner wall of the ladle and the weir 1 and is tapped from the taphole 5 as shown by the arrow in the figure. .

The lid is provided with a pig iron port to reduce the heat retaining effect, but since the lid covers a considerable amount of the upper surface of the ladle, there is some heat retaining effect. In order to improve the heat retaining effect, another lid may be attached to the piggy-hole so that it can be opened and closed, and the piggy-hole is closed during transportation. In this case, since the lid is small, the space required for opening and closing is small, and when sliding or swiveling horizontally on the pot lid, it is possible to open and close within the range of the pot lid size. Since the lid is small and lightweight, it can be opened and closed manually by operating a lever, or can be opened and closed by using a small power device such as a hydraulic cylinder or a motor.

The molten metal level in the ladle at the time of receiving the molten metal from the blast furnace and the inspection of the refractory and the like in the ladle can be carried out from the iron receiving port, but preferably from the iron receiving port. A groove reaching the outer circumference of the lid is provided, and more preferably, this groove is formed so as to expose the taphole.

[0009]

【Example】

 The lid 6 divides the center of the ring by a certain width, fixes each of them on the upper surface of the ladle 4 at symmetrical positions, reaches the tap holes 7 at the center, and reaches the tap holes 5 on both sides, and taps 5 A groove 8 is formed to expose the. The weir 1, which is made of refractory, is fixed to the lid 6 by projecting downward so that it covers the entire surface of the taphole 5 with a certain gap from the taphole 5.

[0010]

[Effect of the device]

 As described above, the ladle lid of the present invention has a heat retaining effect, and since it is fixed to the ladle, a device for opening and closing the lid is not required and the structure is simple. It can be installed in places with limited space, and a weir can block the slag and only the hot metal can be tapped.

In addition, if a lid for opening and closing the pig iron opening is separately provided on the pot lid, the heat retaining effect can be further improved without hindering the pig iron, and this lid can be horizontally slid on the pot lid. Alternatively, the space required for opening and closing the lid can be eliminated or reduced by rotating the lid. In addition, if a groove is provided on the receiving port, it will be easier to inspect the refractory inside the ladle, and it will be easier to observe the molten metal level when receiving steel.

[Brief description of drawings]

FIG. 1 is a cross section of a ladle equipped with a pan lid according to the present invention when pouring hot water.

FIG. 2 is a plan view of the ladle.

3 is a sectional view taken along line AA of FIG.

[Explanation of sign]

 1 ... Weir 4 ... Ladle 5 ... Outlet tap 6 ... Lid 7 ... Receptacle 8 ... Groove

Claims (5)

[Scope of utility model registration request] 1. A ladle ladle lid which is fixed to a ladle provided with a taphole, is provided with a molten metal receiving port, and is provided with a weir projecting downward at a proper distance from the taphole. 2. The ladle lid for a ladle according to claim 1, wherein the lid is provided with another lid for opening and closing the piggy socket. 3. The ladle lid for a ladle according to claim 2, wherein the lid is attached to the pot lid so as to be horizontally slidable or rotatable. 4. A ladle lid for a ladle according to claim 1, wherein a groove extending from the piggyhole to the outer periphery of the lid is provided. 5. The ladle lid for a ladle according to claim 4, wherein the groove is formed by exposing the tap hole.