JPH0655110A - Hydraulic wet type refractory spraying apparatus - Google Patents

Abstract

PURPOSE:To carry out lining work efficiently by providing a pulverizing means of a wet type refractory, a quantitatively wet type refractory supplying means, a quantitatively binder supplying means, a continuously mixing means, and a spraying means of the wet type refractory which is already granulated. CONSTITUTION:This hydraulic wet type refractory M spraying apparatus is provided with a pulverizing means 15 of previously kneaded wet type refractory, a transporting means 17 of pulverized and granulated wet type refractory (a), a first quantitatively supplying means 20 to receive and quantitatively supply the pulverized and granulated wet type refractory (a') which is transported, and a second qunatitatively supplying means 25 to quantitatively supply a hydraulic setting powder binder (b) to the pulverized and granulated wet type refractory (a') which is supplied quantitatively. While being transported continuously, the pulverized and granulated wet type refractory (a') to which the binder (b) is supplied quantitatively is mixed by a continuous mixing apparatus 30 and the already granulated wet type refractory (a') which is transported while being mixed is transported by wind through hose 42 by compressed air and sprayed by a spraying means 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic wet refractory material spraying apparatus.

[0002]

2. Description of the Related Art Conventionally, as a technique for performing a lining work by a refractory material such as a container for receiving molten metal, for example, a ladle, a tundish, a tow truck, a gutter, etc. by a spraying operation,
To spray a refractory with a hydraulic binder added, mix the premixed refractory with water at the construction site and knead it, and then inject this kneaded refractory through a hose with a squeeze pump or piston pump. A general method is to pressure-feed to the tip of the nozzle, send compressed air to the tip of the injection nozzle, and blow the refractory material to the target location with the compressed air.

In such a conventional method, when the materials are kneaded in advance, the curing reaction starts at the time of kneading, and the quality is affected by the change with time until the working time, or hardening occurs before the working. Therefore, the materials must be kneaded at the construction site during construction. As a result, the equipment becomes large in size, and naturally many workers are required, resulting in reduced efficiency. In addition, since a large amount of added water is required for pumping, it is unavoidable that the porosity and the filling rate are reduced, and that the quality is not easily condensed. Further, at the end of the work, the refractory adhered to the kneading equipment, the hose and the like must be washed with water and cleaned, and the adhered matter will harden and cannot be used for the next use.

Therefore, as a means for solving such a problem, a technique such as a unit for spraying a plastic refractory as disclosed in Japanese Patent Laid-Open No. 60-62367 has been proposed.

[0005]

However, although the refractory spraying means in this prior art deals with hydraulic refractory, the binder is relatively free-flowing, but the conventional spraying method is different from the conventional spraying method. Similarly, if kneading is carried out in advance, the hardening reaction will start at the time of kneading, which will affect the quality and cause hardening before construction, so kneading must be done at the construction site. Therefore, there is a drawback that the construction equipment becomes large in size, a large number of workers are required, and work efficiency is poor.

It is an object of the present invention to provide a hydraulic refractory material spraying device which solves the above problems.

[0007]

In order to achieve the above-mentioned object, a spraying device for a hydraulic wet refractory material according to the present invention comprises:
(a) a crushing means for crushing and sizing the pre-kneaded wet refractory to a small particle size, (b) a transfer means for transferring the wet refractory crushed and sized by this crushing means, (c) First quantitative supply means for receiving and quantitatively supplying the crushed and sized wet refractory transferred by the transfer means, (d) crushed and sized for quantitative supply by the first quantitative supply means Second quantitative supply means for quantitatively supplying the binder of the water-curable powder into the wet refractory, (e) the crushed and sized wet refractory to which the binder is quantitatively supplied by the second quantitative supply means. Continuous mixing means for mixing while continuously transferring, and
(f) A spraying means for spraying the sized wet refractory mixed and transferred by the continuous mixing means with compressed air by transporting the air through a hose.

In the present invention, as the first quantitative supply means, the container for receiving the crushed and sized wet refractory material has an open bottom, and a belt conveyor horizontally arranged just below the bottom of the container is arranged. It is preferable that the outlet portion of the container is opened on the traveling side of the belt conveyor in parallel with the required height from the conveying surface of the belt conveyor.

Further, in the present invention, it is preferable that a water addition device is provided in the vicinity of the spray nozzle in the spraying means so that the water content of the refractory to be sprayed can be adjusted.

[0010]

According to the present invention thus configured, a wet refractory material previously kneaded in a factory is carried to a refractory lining construction site, crushed to a particle size that can be used for spraying work, and then quantitatively determined. As it is mixed with the binder of the powder of No. 1, and sprayed in a fixed amount, it is possible to perform the spraying work efficiently without deteriorating the quality of the wet refractory, especially the surface of the wet refractory that has been sized. Since the curable binder is added and mixed, the surface of the particles to be handled becomes a part with less water, and the transportation becomes easier. Moreover, since the kneading equipment is not attached, the equipment does not become large-scale.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A hydraulic wet refractory material spraying apparatus of the present invention will be described below with reference to the drawings of one embodiment. Figure 1
Shown in Fig. 1 is a configuration diagram of the hydraulic wet refractory material spraying device of the present invention.

The hydraulic wet refractory material spraying device of the present invention is, as shown in the figure, a feeder as a transfer means for receiving the wet refractory material a manufactured in the factory and continuously sending it to the crushing means 15. 10 and the kneaded wet refractory a fed by the feeder 10 have a small particle size, for example, a normal particle size of 1
Crushing machine 15 as a crushing means 15 for crushing to a particle size of 0 mm or less
A, a transfer means 17 for crushing and sizing the wet-type refractory material 17 crushed by the crushing machine 15A, and a quantitative supply means 20 for receiving and quantitatively supplying the transferred sized and sized wet refractory material a ′.
And a quantitative supply means 25 of a binder of a water-curable powder for the sized wet refractory a ′ that is sequentially quantitatively transferred,
It is composed of a continuous mixer 30 as a continuous mixing means, an adjusted wet-refractory material spraying means 40 that has been sized, and a control mechanism 50 for controlling these. The driving units of the respective means and mechanisms are centrally controlled by a control panel of a control mechanism 50 separately installed. This control mechanism 50
In addition, it mainly has a function of controlling the rotation of the motor of the drive unit of each operation unit, the operation of supplying compressed air to the air pad in the quantitative supply unit 25 of the binder of the water-curable powder, and the like.

A feeder 10 for feeding a pre-kneaded wet refractory to a crusher 15A for receiving and making it usable.
Is composed of a belt conveyor 11 and a bottomless container 13 arranged above the conveyor belt 12 of the belt conveyor 11. The wet refractory a, which is the object to be transferred, is loaded into the container 13 and sent out through a gap formed between the lower end of the exit of the container 13 in the traveling direction of the transfer belt 12 and the upper surface of the transfer belt 12. Therefore, a gate plate is provided at the container outlet so that the feed amount can be adjusted by adjusting the gap at the container 13 outlet. The wet refractory a supplied to the feeder 10 is kneaded in a factory in advance and is compacted by its own weight during transportation and storage, so that it is supplied in a container that opens at the bottom or a container bag C.

In the crusher 15A, a wet refractory a crushed by rotating a paddle in a body formed with a perforated plate having a large number of small holes of a required diameter in a trough shape is sent to the outside through a porous portion of the body. It is configured to Therefore, the wet refractories a put into the disintegrator 15A and adhered and assembled are
The coarse lumps are crushed and sized by passing through the small holes of the perforated plate forming the body. The diameter of the wet refractory a which is sized by the small holes of the perforated plate is usually 10 mm or less. The wet refractory a ′ crushed and sized by the crusher 15A is transferred from below the crusher 15A to a transfer means 17
It is sent to the fixed amount supply means 20 which is the next step by the belt conveyor 17A.

The fixed amount supply means 20 is composed of a belt conveyor 21 and a container 22 arranged on the upper side thereof and having no bottom. The wet-type refractory a ′ that has been sized and placed in the container 22 is the container 22 in the traveling direction of the belt conveyor 21.
It is sent out through a gap formed between the lower end of the outlet and the upper surface of the belt conveyor 21. A damper 23 is provided at the outlet of the container 22 so that the feed amount can be adjusted to the required amount by adjusting the gap at the outlet of the container 22. The sizing of the wet-type refractory material a ′ that has undergone sizing here is layered and moved on the belt conveyor 21. The container 22 has an open bottom, and the sized wet refractory material a ′ that is received is placed on the belt conveyor 21 sequentially from the bottom and cut out from the container 22 outlet without any difficulty. It can be delivered in set amounts and supplied in a fixed amount.

At the upper part of the forward position of the belt conveyor 21, a binder supply device 25A is provided as a constant binder supply means 25 for supplying a fixed amount of the binder of the water-curable powder. This binder feeder 25A is composed of a container 26 containing a binder of water-curable powder (for example, alumina cement or the like, hereinafter referred to as a water-curable binder b), and a rotary valve 27 attached to the lower outlet thereof. The container 26 has an air pad 26 'at the bottom thereof.
In order to prevent the flow of the water-curable binder b from being impaired inside, compressed air is sent from outside as needed to prevent the occurrence of a dense pressure state due to its own weight. Further, a duct connected to the dust collector is provided above the container 26 so that fine dust can be removed. From such a binder feeder 25A, a rotary valve 27 is used to spray and supply a required amount of the water-curable binder b onto the layer of the sized wet refractory material a ′ sent by the belt conveyor 21. At this time, the amount of the water-curable binder b is 2 to 15% with respect to the wet refractory a '.
Will be supplied at the rate of.

Below the tip of the belt conveyor 21,
A continuous mixer 30 is arranged, and as the continuous mixer 30, a screw type mixer is adopted. Of course, it is not limited to this. In this continuous mixer 30, the water-curable binder b and the wet refractory a ′ are directly supplied to the belt conveyor at the supply port 31 provided on the upper side of one end.
When it is charged from 21, it is mixed by the screw that rotates inside the casing of the continuous mixer 30 while moving to the outlet 32 in the casing, and water-cured powder on the surface of the sized wet refractory a '. Is mixed in a state in which the conductive binder b is uniformly attached.

The wet refractory a'which has been sized in this way and the water-curable binder b attached to the surface thereof is supplied from the continuous mixer 30 to the container 41 of the spraying means 40 in sequence, and compressed air is supplied. It is wind-powered by the hose 42 and is sprayed on the target wall surface by the well-known injection nozzle 43 attached to the tip of the hose. Since the surface of the wet refractory a ′ that has been sized and supplied to the spraying means 40 is wrapped with the water-curable binder b as described above, the surface becomes a portion with little water content, Therefore, when the hose 42 is transported by wind, the hose 42 does not adhere to the hose 42 and block the hose 42 for easy transportation.

A hose 61 for supplying water and a cock 62 are provided in the vicinity of the spray injection nozzle 43 in the spraying means 40.
If a water addition device 60 is additionally provided by connecting with, for example, when it is necessary to add water to the sized wet refractory a ′ to be sprayed, it is possible to spray while adding an appropriate amount of water. , Workability can be improved.

[0020]

As described above, according to the present invention, the water-curable binder supply means is incorporated between the crushing means and the spraying means, and the surface of the wet refractory material sized during spraying has less water content. By being wrapped by the layers and being supplied to the spraying jet nozzle, blockage at the spraying supply section is prevented and efficient lining work can be performed. In addition, since no kneading device is required at the construction site, large-scale equipment is not required, and work can be performed without wasting material to be prepared, thus improving the economical efficiency.
Furthermore, by attaching a water addition device near the injection nozzle in the spraying means, the water content of the spraying material can be adjusted by the operator, which is convenient.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a hydraulic wet refractory material spraying device of the present invention.

[Explanation of symbols]

10 Feeder 11, 17A, 21 Belt Conveyor 13, 22, 26, 41 Container 15 Crushing Means 15A Crusher 17 Wet Refractory Material Transfer Means 20 Quantitative Feeding Means 23 Damper 25 Quantitative Feeding Means of Water-Curable Powder Binder 25A Binder feeder 27 Rotary valve 30 Continuous mixer 31 Continuous mixer inlet 32 Continuous mixer outlet 40 Spraying means 42 Hose 43 Injection nozzle 50 Control mechanism 60 Water addition device a Wet refractory a 'Grained wet refractory Products (wet refractories with sized particles) b Water-curable binder

Front page continued (72) Keiichi Hirafuku Keiichi Hirafuku 1-3-1 Niihama, Arai-cho, Takasago, Hyogo Prefecture Harima Ceramic Co., Ltd. Incorporated (72) Inventor Tono Hashimoto 1-3-1 Niihama, Arai-cho, Takasago-shi, Hyogo Harima Ceramic Co., Ltd.

Claims (3)

[Claims] 1. A crushing means for crushing and sizing a pre-kneaded wet refractory material to a small particle size, and (b) a transfer for transferring the wet refractory material crushed and sized by this crushing means. Means, (c) first quantitative supply means for receiving and quantitatively supplying the crushed and sized wet refractory transferred by the transfer means, (d) solution fixedly supplied by the first constant supply means Second quantitative supply means for quantitatively supplying the binder of the water-curable powder into the crushed and sized wet refractory material, (e) the crushed and sized powder to which the binder is quantitatively supplied by the second quantitative supply means Continuous mixing means for continuously transferring and mixing the wet refractory material, and (f) spraying means for blowing the granulated wet refractory material mixed and transferred by the continuous mixing means through compressed air to the wind through a hose. , Which is equipped with Fire spraying device. 2. The first fixed amount supply means has a bottom portion of a container opened, and a belt conveyor which is horizontally moved is arranged just below the bottom portion of the container, and an outlet portion of the container advances the belt conveyor. The hydraulic wet refractory material spraying device according to claim 1, wherein the hydraulic wet refractory material spraying device is configured so as to be opened in parallel with a required height from the conveying surface of the belt conveyor. 3. A hydraulic wet refractory material spraying apparatus according to claim 1, wherein a water adding apparatus is provided near the spraying nozzle of said spraying means.