JPS6229462Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention provides equipment that can continuously and automatically manufacture lance pipes for desulfurization, and particularly reduces construction costs. The purpose is to automatically operate the entire process from filling to curing and drying, increasing the quality and productivity of lance pipes.

Traditionally, the equipment used to manufacture lance pipes includes a cylindrical formwork made of steel with a length of 3 to 5m, a mixer for adding and kneading the desired moisture to the caster, and a slightly longer length (height) than the formwork. The drying equipment and hoist were installed. Then, the formwork is fixed vertically in advance, and a long cored metal pipe with a cross-shaped nozzle hole installed at the tip (lower end) is suspended from above using a hoist and then inserted into the formwork. While operating the attached vibrator, steel fibers (0.2 to 0.4 mm in diameter, 30 to 30 mm in length) with 3 to 8% water added are
Castable containing 50mm thin steel wire is introduced into the narrow annular gap from the hopper and filled. After that, it is left naturally (cured) for about 12 hours to harden, then removed from the frame, and further dried in a drying device to a thickness of 60 to 80 mm.
A lance pipe with a coating layer of mm was manufactured. However, these facilities had the following drawbacks.

With the recent development of steelmaking technology, lance pipes are becoming 5 to 7 meters long, but in order to manufacture such long ones with the formwork upright, buildings with a height of 10 meters or more, A work deck with a length of 5 meters or more and a drying device with a height of 6 to 8 meters are required. Therefore, construction costs are high and a large amount of capital is required.

Since each device is not systematically arranged, the process is intermittent, requiring many workers, and it takes time to load, fill, and cure (harden) the castable, resulting in low productivity.

In order to fill every corner of the formwork with steel fiber-containing castable, it is necessary to add 1 to 2% more water by weight than the standard, so the packing density of the coating layer does not become high. Furthermore, since the formwork is vibrated vertically, there is a difference in quality between the upper and lower parts of the coating layer (3 to 4% in porosity), and the upper slag line part is likely to be damaged during use.

As a result of research to solve these problems, the present inventors set the oblong formwork proposed earlier by the present applicant horizontally, and transferred the castable in that state even after filling it. They completed this invention by focusing on the fact that if they were cured and dried, the buildings and various equipment needed to be low-priced, resulting in lower construction costs.

EMBODIMENT OF THE INVENTION Below, the manufacturing equipment of this invention is demonstrated in detail based on the drawing which shows an Example.

1 and 2 are a plan view and a side view, respectively, of the manufacturing equipment of the present invention.

The manufacturing equipment of this invention can be roughly divided into horizontal formwork 1
A pair of elongated conveyors 2 that transport the materials backward at a predetermined speed, a gate-shaped frame 3 that straddles them, a cart 4 and a kneading device 5 movably mounted on the conveyor 2, and a caster 6 are introduced. It consists of a device 7 that vibrates the formwork 1, a curing device 8 that heats the whole formwork 1 and hardens the filled castable 6, and a drying device 9 that removes moisture after unmolding, and the procedure is set in advance. Therefore, by automatically operating all the devices, it is possible to continuously manufacture lance pipes 10 with a homogeneous structure.

In Fig. 1, 1 is a well-known pouring formwork, on which side plates of the same length are removably attached with bolts and nuts on a long and thin steel substrate approximately 5 to 7 meters long, and the center A core metal pipe 11 with a length of about 6 to 7.5 m is set in the mold, and a narrow opening 12 is provided on the upper side (only the main formwork is shown in the drawings, and the others are omitted). . 2 is a well-known conveyor, such as an electric roller conveyor or an endless chain conveyor with a length of about 20 m, which is installed parallel and horizontally at intervals that can support the vicinity of both ends of the formwork 1 from below. There is a curing device 8 and a drying device 9 at the rear by passing under the frame 3.
It penetrates both. That is, the frame body 3 is approximately 1 m in height, straddling the pair of conveyors 2 at almost right angles.
It is a steel structure with a length (span) of approximately 8 m, and is fixed or movable on the foundation.
The formwork 1 whose lower side is placed on the conveyor 2 passes backward (in the direction of the arrow). Reference numeral 4 denotes a self-propelled or towed trolley, which can move freely on the frame 3, on which a well-known screw-type or batch-type kneading device 5 (kneading capacity 15 t/hr.) and A water tank 13 is fixedly installed. 7 is a well-known vibration device, which is a rotary vibrator with an unbalanced weight (frequency 2000 to 3600 V.PM, amplitude 0.3 to 0.5 mm) or a small vibrating plate with a built-in electromagnetic vibrator. A support member (not shown) provided on the foundation slightly in front of the frame 3 or protruding forward from the frame 3 is provided with a single or 3 to 4 support member (not shown) in the axial direction of the form 1 so that the frame 1 can be raised and lowered. They are arranged side by side. 8
is a short box-shaped curing device, which is installed on a platform with a height of about 500 mm 2 to 3 meters behind the frame 3, and a pair of conveyors 2 pass through it horizontally. There is. That is, the curing device 8 is box-shaped with a length of about 3 m (in the direction of the conveyor 2), a width of about 8 m (in the axial direction of the formwork 1), and a height of about 700 mm, and the inner surface is covered with ceramic fibers. It is lined with things like. A blast pipe 14 for supplying hot air (waste gas) at 30 to 100° C. is connected to the upper side, and the front and rear surfaces are open. However, if necessary, a ceramic fiber blanket (not shown) may be provided above the entrance.
Thermal efficiency can be further improved by minimizing the gap with the formwork 1. Furthermore, 2 to 3 meters behind the curing device 8 is a lance pipe 1 after the frame is removed.
Drying device 9 of the same type that can heat 0 to 100 to 200℃
is installed, and as mentioned above, the conveyor 2 similarly passes through it horizontally. It should be noted that the curing, the temperature of the drying devices 8 and 9, the amount of air flow, etc. can be set to arbitrary conditions and changed as necessary, similar to the transfer (movement) of the trolley 4 and the operation of the kneading device 5. .

By the way, in order to operate the manufacturing equipment of the present invention, the curing device 8 and the drying device 9 are maintained at an optimum temperature in advance according to the thickness of the caster 6 and lance pipe 10 to be used, and,
The formwork 1 with the cored pipe 11 set is placed on the hoist 1
5, etc., and after sequentially placing them on the conveyor 2, they are slowly transferred to the rear, and when they come directly above the vibrating device 7, they are automatically stopped.

Thereafter, high alumina castable 6 containing approximately 5% by weight of steel fibers was supplied to the kneading device 5 through a long flexible hose 16, and thoroughly kneaded while adding approximately 6% by weight of water. The material is introduced into the formwork 1 through the opening 12 through a chute 17 attached to the tip thereof. At the same time, by remote control, the trolley 4 is slowly moved in the axial direction of the formwork 1 and fully loaded, and the vibration device 7 is then raised to tightly contact the underside of the formwork 1 for 20 to 120 seconds. When activated, the castables 6 can be filled evenly and densely. Next, after lowering (separating) the vibrating device 7, the conveyor 2 is operated to transport the mold 1 to the rear, and the empty mold 1 in front is stopped at a predetermined position and filled in the same way.

In this way, the formwork 1 continuously filled with castables 6 is automatically loaded into the rear curing device 8 through the lower side of the gate-shaped frame 3, and the molds 5 to 8 passing through it are automatically loaded into the rear curing device 8. It will cure and fully harden in time. In addition, if it is less than 5 hours, it will not have sufficient strength,
If the time is longer than 8 hours, the productivity will decrease, so the above range is desirable. Formwork 1 extracted from curing device 8
is dismantled by a worker, and the lance pipe 10 inside is taken out. Immediately thereafter, the lance pipe 10, which still contains some moisture, is continuously loaded into the drying device 9 at the rear by the conveyor 2, and dried for the same period of time to form a product.

In this way, a series of operations from transferring the formwork 1 and kneading and filling the castable 6 to curing and drying are carried out by the commonly used automatic control method, making it possible to operate continuously for long periods of time, and requiring personnel to do the curing. Only a small amount is necessary for removing the frame and taking out the lance pipe 10 later.

Therefore, the manufacturing equipment of the present invention has the following advantages.

(1) After filling castable into a horizontally set formwork, it is automatically transferred and cured, and long lance pipes can be dried in a horizontal state even after the formwork is removed. A certain degree of height is sufficient. Therefore, the construction cost becomes very low.

(2) Castables containing steel fibers can be filled into so-called horizontal formworks by vibration so that the steel fibers are not unevenly distributed, resulting in dense and low porosity of 12 to 13% (conventionally 15 to 18%). It is possible to manufacture a lance pipe with uniform quality having a coating layer of 100%, and the durability is approximately doubled (6 to 8 charges).

(3) From transporting formwork to mixing castables, etc.
Since all processes from curing to drying are automatically controlled using conventional methods, long-term continuous operation is possible, and the number of workers has been reduced from the previous five to two.
Significant labor savings can be achieved.

(4) The process from filling to drying of castables is efficiently linked and operated continuously, and in particular, the curing and drying processes can be shortened to about 70% compared to conventional methods, improving productivity.

As described in detail above, the lance pipe manufacturing equipment of the present invention has a well-known conveyor for transporting horizontal formwork, a gate-shaped frame on which a kneading device is mounted, etc., in a system that makes it easy to work on the foundation. The construction costs can be reduced because the buildings and various equipment can be relatively low-priced. In addition, by effectively linking and operating all the devices using well-known mechanical or electrical means or, if necessary, using a small computer, it is possible to continuously manufacture lance pipes with uniform quality using a small number of people. , productivity and durability can be greatly increased.

[Brief explanation of drawings]

FIG. 1 is a plan view of the manufacturing equipment of the present invention, and FIG. 2 is a side view thereof. In the figure, 2... conveyor, 3... frame body, 4... trolley, 5... kneading device, 7... vibrating device, 8... curing device, 9... drying device.

Claims (1)

[Scope of utility model registration request] A trolley 4 carrying a kneading device 5 is movably mounted on a gate-shaped frame 3 that straddles a long horizontal conveyor 2, and a vibration device that can be raised and lowered near the front of the frame 3 is installed. A lance pipe manufacturing facility characterized in that a curing device 8 and a drying device 9 are successively installed at the rear of the lance pipe manufacturing equipment 7, and the conveyor 2 is passed through the system.