JPS6028959Y2 - Pouring refractory material supply device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a refractory material supply device that pours construction material onto the entire circumferential surface of the inner wall of a molten metal container when lining the container with a monolithic refractory for pouring.

The side walls and bottom of molten metal containers such as ladles and vacuum degassing containers used in the steel industry are lined with refractories, and these are further coated with permanent lining (also called permanent lining) on the outside and work lining (also called lining) on the inside. ), but in recent years there has been an increase in harsh usage conditions, such as violent stirring of molten steel in molten metal containers such as in ladle refining, which has resulted in severe damage to the lining refractories, resulting in unbalanced lining damage, In addition, effective construction measures are required to prevent accidents such as leakage of hot water from containers.

Recently, the construction of lining the side walls of these molten metal containers has been carried out by adding 6 to 8% moisture and a deflocculant to refractory raw materials whose particle size has been adjusted.
@The number of construction projects using castable monolithic refractories that have been kneaded with additives such as glue and dispersants is increasing.

In the case of a ladle, devices as shown in FIGS. 1, 2, 3, and 3 have conventionally been used as a supply device for refractory material for pouring work.

Figure 1 is a longitudinal cross-sectional view of the equipment and construction situation, where 1 is a mixer for kneading refractory materials, 2 is a conveyor that conveys the mixed and discharged pouring material to the top of a conical distributor 3, and 4 is a permanent lining of a ladle. , 5 is a cylindrical pouring construction formwork (hereinafter referred to as formwork), which is installed approximately in the center of the ladle with a gap corresponding to the construction thickness of the work lining of the ladle between it and the permanent lining 4. has been done.

The pouring material 6 falls onto the top of the conical divider 3, so it is distributed over the entire circumference of the slope, and at the same time it falls onto the entire circumference of the gap in the ladle, the ladle is moved to the swinging rotary table. This device (Japanese Patent Application Laid-open No. 144803/1983) casts refractories while rocking and/or rotating it vertically and horizontally on the top of the distributor 3. Although the distributor 3 is conical in shape, the top It is difficult to distribute the casting material evenly in the circumferential direction of the ladle by simply dropping the casting material from one place, and for this reason, a table that swings and rotates the ladle, which has about 12 dimensions including the formwork 5, is required. It is necessary to install large equipment such as 6.

Also, in this device, the capacity of mixer 1 is limited (
(usually about 2 tons) kneading work must be repeated intermittently before lining construction, making continuous pouring work impossible and inefficient.

In addition, there were disadvantages such as generation of dust around the mixer, waste water treatment for washing inside the mixer, etc., which was not favorable for the working environment.

As shown in Figure 2, as a device that solves this drawback and continuously pours monolithic refractories, the monolithic refractories are kneaded in a mixer installed at a location away from the ladle and are temporarily stored in an intermediate packet 1. The intermediate packet 7 is transported by a transportation crane 8 to above the conical distribution device 3 installed on the ladle, and is placed on top of the conical distribution device 3. At the same time, the gate at the bottom of the intermediate packet 7 opens to allow the pouring material 6 to flow down. No. 73460/1983), but with this device, the mixed refractories must be frequently transported from the mixer to the ladle, which is difficult to implement if the existing crane does not have enough time to operate. , or a separate dedicated packet transport device must be installed.

A rotating chute type feeding device as shown in FIG. 3 has come to be used as a device for improving the above-mentioned drawbacks and distributing pouring material continuously and evenly over the entire circumference.

That is, in FIG. 3, numeral 9 is a drive device provided in the conical distributor, and 10 is a rotating chute that is continuously rotated in a constant direction by 360 degrees over the entire circumference of the slope of the conical distributor by the drive device 9.

A constant continuous amount of pouring material 6 kneaded by the mixer 1 and conveyed by the belt conveyor 2 is evenly distributed over the entire circumference and continuously forms the work lining of the ladle. The problem is that it requires equipment such as a belt conveyor 2 that adjusts the drop point of the poured material according to the height of the ladle, that is, the height position of the rotating chute 10, and therefore requires a large space.

More importantly, all of the conventional apparatuses described above have the disadvantage that it is impossible to simultaneously apply two or more different types of poured refractory materials.

Generally, the refractory lining of a molten metal container does not erode evenly; for example, on the side wall of a ladle, the slag side has more eroded damage than the side opposite to the slag, and this can cause the ladle to have to be repaired. This often reduces the service life of the lining.

Therefore, when repairing the lining, in order to balance the erosion loss by constructing a thick side wall work lining on the slag discharge side in advance, the formwork 5 should not be installed in the center of the ladle, but should be eccentrically placed on the side opposite to the slag discharge. It is installed.

In this case, the positioning of the formwork 5 is impossible because the gap between the outer wall of the formwork and the side wall permanent lining, that is, the wall thickness of the work lining, is only 15 to 2 inches, so positioning work outside the formwork is impossible. Not only is it necessary to measure the distance to the sidewall permanent lining from several locations within the frame and adjust the installation position of the formwork based on this distance, but it is also necessary to make the lining on the slag discharge side thicker. Since the slag side becomes thinner, it is not a fundamental solution for extending the service life.

In view of the problems of the conventional technology explained above, this idea was created by simultaneously pouring two to four types of pouring refractory materials of different quality according to the different degrees of erosion of each part of the side wall due to the use of a molten metal container. The purpose of the present invention is to provide a feeding device to maintain a balance between melting and loss of the container and extend its service life.

The gist is that a hopper is installed on the top slope of a conical distributor installed at the top of the pouring construction frame, and the inside is divided into 2 to 4 parts by vertical partition plates, and the hopper is opened and closed so that the lower part of the hopper can be opened and closed. The pouring refractory material supply device is characterized in that a lifting device is provided inside the conical distributor.

This invention will be explained based on the drawings. FIG. 4 is a longitudinal sectional view of an embodiment of the ladle of this invention, and FIG. 5 is a plan view of FIG. 4.

The installation of the conical distributor 3 on the upper part of the formwork is the same as in the prior art, but the first feature of this invention is that a vertical partition plate 11 is installed inside the conical distributor 3 on the conical slope. The second feature is that the cylindrical hopper 12 is divided into four parts and each divided part is provided with a cylindrical hopper (2) containing different types of pouring materials. The object is to allow the parallel gap between the lower end of the conical distributor 3 and the slope of the conical distributor 3, that is, the outflow opening 13 for the poured material, to be freely opened and closed.

In Fig. 4, 14 is a drive device such as a hydraulic cylinder installed inside the conical distributor 3, 15 is a pedestal on which the drive device is placed, and 16 is a cylinder shaft directly connected to the drive device and the upper part of the hopper. By moving the hopper 12 up and down with the drive device 14, the hopper 12 can be raised and lowered, and the outflow opening 13 is accordingly opened or closed.

As shown in FIG. 5 of the plan view, the inside of the hopper 11 is divided into 12', 12'' and 12 nt by the vertical partition plate 11.
Divided into 4 sections of 12 mt each, each section is filled with refractory materials of different quality 6', 6'', 6''', 6''''
is accommodated.

Therefore, by raising the main body of the hopper 12, openings parallel to the slope and having the same rectangular shape are formed in each section, and four types of pouring materials of different quality flow out at the same time in approximately the same amount, so that the side wall lining can be removed. Simultaneous construction using four different types of refractories across four zones, so-called zone lining construction, becomes possible.

Although FIG. 5 shows an embodiment in which the hopper 12 is divided into four parts, the hopper 12 can also be divided into two or three parts if necessary, and the area ratio of each divided part can be freely designed.

Zone lining with 5 or more different types of refractories is also possible, but the preparation of the pouring material becomes complicated.
In addition, it is rarely used in practice.

In zone lining using the device of this invention, two types of refractory materials coexist at the boundary between lining construction bodies of different quality, which eliminates the conventional problem of joining different types of refractories, that is, partition plates. If partition plates are used for construction, the boundary areas are likely to be damaged, and if partition plates are not used, there is a time loss in curing and drying the previously constructed construction and then pouring in the subsequent materials and curing and drying them. The shortcomings of are eliminated.

In the device of this invention, the gap between the top of the conical distribution device 3 and the drive cylinder shaft 16 must be sealed so that the pouring material in the hopper 12 does not flow into it.

As mentioned above, the wear and tear caused by the use of refractory linings in molten metal containers varies greatly depending on each part. For example, in a ladle, the melting rate on the slag side is faster and deformation wear occurs, so the melting on the slag side of the side wall lining For example, 40% of the surrounding surface that is considered to be damaged is filled with highly corrosion-resistant pouring material.
% of the surrounding surface with ordinary pouring material at the same time can be easily carried out using the device of this invention.

Next, in this invention, the mixer for kneading and preparing the pouring material is not installed near the ladle repair site, but the pouring material is transported by a crane or the like from a kneading factory set up in a separate location such as a fireproof material storage area.

A plurality of mixers are installed in the kneading factory so that 2 to 4 types of different pours can be prepared.

The materials necessary for the pouring construction are prepared based on the zone lining product composition, quantity, and preparation order planned in advance, and are stored in the intermediate hopper 17 and transported to the upper part of the hopper 12 by the crane 18.

The intermediate hopper 17 has a hopper opening/closing device 19, and the intermediate hopper 1 is located at a predetermined position on each section of the hopper 12.
7, the pouring material falls into the desired area of the hopper 12.

The storage capacity of the hopper 12 depends on the required amount of side wall work lining (10 tons to 30 tons), but approximately 5 to 8 tons is appropriate. It can be performed.

The different types of poured materials stored in the hopper (2) flow out from the outflow opening 13 in each section by operating the drive device 14 and lifting the entire hopper 12 upward, and flow down the slope of the conical distributor 3. Then, the gap between the side wall permanent lining 4 and the formwork 5 is filled, and zone lining is performed with a refractory material of a quality suitable for each part of the side wall work lining.

It should be noted that with conventional refractory material supply equipment, it was almost impossible to repair only 1/3 or 1/4 of the side wall lining at partial angles, but with this design, each divided section within the hopper is used selectively. This allows partial repair of any part of the sidewall.

Next, a comparative example of the effects based on the results of constructing the side wall work lining of a ladle using this front and back apparatus and the conventional apparatus shown in FIG. 2 will be described.

Table 1 shows the details of the construction, and Table 2 shows the results of use in the ladle.

As is clear from Tables 1 and 2, since continuous pouring is possible with the device of this invention, the construction time is 112 and the total number of man-hours is approximately 173 compared to conventional construction.

In addition, as a result of zone lining, the side wall lining is eroded almost evenly, so the average life of the ladle is approximately 75%.
p (including some effects from improving the quality of pourable refractories).

As explained above, the device of this invention can simultaneously and continuously apply two or more types of poured refractory materials of different quality to the side wall lining, and as a result, it is possible to perform zone lining according to the erosion condition, and as a result, the construction thickness can be reduced. There is no need to move the formwork to change the temperature, and it is also effective in reducing the number of construction steps, shortening the curing period, and significantly extending the usable life of the ladle.

This idea is not limited to circular ladles, but also oval, rounded,
Other molten metal containers having rectangular or other cross-sections can also be applied by modifying the distributor and hopper design.

[Brief explanation of drawings]

1 to 3 are vertical sectional views showing a conventional device and its construction state, and FIGS. 4 and 5 show an embodiment of the device of this invention. 5 is a plan view. 3... Conical distributor, 4... Permanent lining of curved ladle, 5... Formwork for pouring construction, 6',
6″. 6nt, 6″″・・・Pouring materials in each area,
11... Vertical partition plate, 12... Hopper, 12', 12" 12 ///, 12 ///
/...Each section in the hopper, 13...
-Outflow opening, 14... Drive device, 15...
... Drive unit frame, 16... Drive cylinder shaft, 11... Intermediate hopper, 18...
・Transportation crane, 19...hopper opening/closing device.

Claims (1)

[Scope of utility model registration request] A hopper whose interior is divided into 2 to 4 parts by a vertical partition plate is installed on the top slope of the conical distributor provided at the top of the pouring construction frame, and a lifting device for the hopper is installed so that the lower part of the hopper can be opened and closed freely. A pouring refractory material supply device, characterized in that it is provided inside the conical distributor.