JPH055591A - Laying apparatus for monolithic refractory - Google Patents

Abstract

PURPOSE:To perform a casting work by one operator by providing a storage tank, a gas transporting unit, a kneader, a supply unit and a controller, and continuing, automating and sealing a material handling after receiving a material. CONSTITUTION:Materials for an indeterminate form refractory are received from a tank lorry 4 directly to a storage tank 2 at each type, and weighed by a load cell 6. Deterioration of an environment due to powder dusts is eliminated by a bag filter 10. When a delivery command is generated by an instruction from a microcomputer 42, the tank 2 is pressurized, a shut-off valve 8 is opened, a predetermined material is gas-transported to an intermediate tank 14 via a transport tube 12, and weighed by a load cell 22. After a predetermined quantity of material is weighed by the cell 22 through a shut-off valve 24 by gravity dropping from the tank 14, it is cast in a mixer 18. In the mixer, suitable amount of water is added from a water tank 16 through a shut-off valve 26, kneaded, and fed to a space between a vessel 30 and a framework 34 through a conveyor 32.

Description

Description: TECHNICAL FIELD The present invention relates to an apparatus for casting irregular shaped refractory material, and more particularly to an apparatus for casting irregular shaped refractory material in a molten metal container with excellent work efficiency. It can be widely used as a container for storing hot metal or molten steel such as a toy car, a ladle, a vacuum degassing device, and a tan dash which are used in odors.

[Conventional technology]

 When constructing an amorphous refractory in a molten metal container, place a formwork (also called a core) at a predetermined position of the container, and insert an amorphous refractory between the formwork and the permanent tension refractory. Recently, the so-called pouring construction, in which the construction body is formed by pouring, is being carried out.

 Regarding the pouring construction of irregular-shaped refractory, the technology is disclosed, for example, in Japanese Patent Publication No. 21-21363 or Japanese Patent Publication No. 61-2870. However, even though these conventional technologies require large-scale equipment, it remains difficult to say that the work man-hours and work environment have been reduced accordingly.

In other words, if it is attempted to reduce the number of workers, time, resources and work environment by improving the pouring work, not only the pouring work is improved, but all the processes from receiving the material to casting (casting) are performed. Achieving the above goals throughout the process is an absolute requirement when considering the total system.

 For example, in the case of the conventional method of handling material such as 25 kg paper bag or 500 kg flexible container, even if only the pouring work is automated, as in Japanese Utility Model Laid-Open No. 63-60894, the receiving, handling, The processing of empty bags inevitably occurs, and it is extremely difficult to achieve a reduction in the number of people, time, resources and working environment.

[Problems to be Solved by the Invention]

 The object of the present invention is to solve the above-mentioned problems of the prior art, and to perform continuous, automated and sealed material handling after receiving material so that one operator can perform all pouring work without generating dust. The purpose of this is to provide a method for pouring a typical irregular refractory material.

[Means for solving the problem]

 The gist of the present invention is as follows.

That is, in the apparatus for pouring the amorphous durable material into the molten metal container, the storage tank for the amorphous durable material and the weighing and cutting device, and the gas transport device for the material from the weighing and cutting device to the kneading device are provided. , A kneading device for mixing and kneading the transported material with water, a transporting device and a supplying device from the kneading device for the water-containing material to the molten metal container, and the height of the top surface of the casting body in the molten metal container. And a control device for adjusting the cut-out amount of the weighing-out cutting device and controlling the operation of each device based on the water content in the kneading device and the measurement value of the measuring device. This is a construction device for irregular-shaped refractories.

 The details of the present invention will be described with reference to the system diagram of FIG. A plurality of storage tanks 2 are provided so that the amorphous refractory material can be stored by type. The storage tank 2 is constructed so that it can be directly received from the tank truck 4, and can be weighed by the load cell 6.

Further, a cut-off valve 8 is provided as a cutting device below, and a bag filter 10 is provided above the cut-off device to prevent dust from being received. A transportation pipe 12 for gas transportation is provided from the shutoff valve 8 to the kneading device.

The kneading device is composed of an intermediate tank 14, a water tank 16 and a mixer 18. The intermediate tank 14 is provided with a bag filter 20, a load cell 22, and a shutoff valve 24, and a shutoff valve 26 is also attached to the lower side of the water tank 16. Below the mixer 18, there is a gate 28 for discharging the kneaded material.

A conveyor 32 for transporting the water-containing material from the mixer 18 to the molten metal container 30 for construction and a swirling chute 36 for charging the material into the gap between the mold 34 and the container 30 are provided. The form 34 is provided with a vibrating device 38 for giving vibration.

 A measuring device 40 is provided for measuring the height of the upper surface of the poured work in the molten metal container 30, and a mechanical type is shown in the figure, but not limited to this, an ultrasonic type may be used. Further, a microcomputer 42, an operator terminal 44, and a printer 46 are provided as control devices. The measured values of all the load cells 6 and 22 and the measuring device 40 are input to the micro computer 42 so that the shut-off valves 8, 24 and 26, the gate 28, the vibration device 38, etc. can all be controlled by the micro computer 42. It is configured.

[Work]

 Next, the operation of the casting apparatus for casting irregular-shaped refractory according to the apparatus of the present invention will be described. The amorphous refractory material is directly received from the tank truck 4 into the storage tank 2 for each type and weighed by the load cell 6, so no human labor is required, and the bag filter 10 does not deteriorate the environment due to the dust. When a cutout command is issued according to an instruction from the micro computer 42, the storage tank 2 is pressurized by, for example, dry air, the shutoff valve 8 is opened, and a predetermined amount of material is gas-transported to the intermediate tank 14 by the transport pipe 12. .. As described above, when storing amorphous refractory materials in a tank and when carrying out gas transportation, enclose dry air or nitrogen in the tank to prevent absorption of water and carry out gas transportation. In this case, the intended purpose can be sufficiently achieved by performing gas agitation in order to prevent the segregation of the refractory material.

The transported material is accurately weighed by the load cell 22 of the intermediate tank 14, and the residual pressure of the gas used for transportation is released. A predetermined amount of material is weighed in the load cell 22 from the intermediate tank 14 via the interception stool 24 due to gravitational fall, and then is fed into the mixer 18. In the mixer 18, an appropriate amount of water is added from the water tank 16 via the shutoff valve 26, and sufficient kneading is performed. The water-containing material after kneading is uniformly poured into the space portion formed by the container 30 and the mold 34 by the swirling sheath 36, by opening the gate 28 and passing through the conveyor 32. The poured refractory material is further homogenized by the vibration device 38 and the packing density is improved. The height of the upper surface of the pouring construction body under construction is measured by the measuring device 40, and the measured value is input to the microcomputer 42.

 In the pouring process of the irregular-shaped refractory of the molten metal container 30, for example, the melting rate of the refractory is different between the side wall of the ladle where the molten steel contacts and the slag line where the contact time with the slag is long. It is common.

Therefore, different refractories will be installed on the side wall and the slag line. In particular, this boundary must be set strictly according to the operating conditions.

For this reason, it is important to measure the level of the construction body in order to determine the final kneading amount. This measured value is input to the micro computer 42, which is the control device that controls the entire system, the remaining amount of work is instructed so as to satisfy the difference value from the preset level value, and the next cutout command is issued. .. Based on this cut-out command, the weighing and cutting-out device from the storage tank 2, that is, the shut-off valve 8 and the like are interlocked with each other, whereby all the work of the intended construction body is completed. In addition, following the fluctuation of the kneading amount and the change of the refractory brand, it is natural that the amount of water to be added from the micro computer 42 is also injected into the mixer 18 from the water tank 16 via the shutoff valve 26. That is.

 Further, since a plurality of amorphous refractory material storage tanks 2 are held and simultaneously cut out, the desired plural materials can be blended, so that the refractory material purchase cost can be reduced.

 The device of the present invention can be used by one operator operating the operator terminal 44 from cutting out of a material for construction of irregular refractory to pouring. In addition, bag filters 10 and 20 are provided in the storage tank 2 and the intermediate tank 14, respectively, and air is transported by the transportation pipe 12, so that environmental pollution due to dust can be prevented.

〔Example〕

 As shown in Table 1, 20T refractory was poured into a ladle by the method of using the device of the present invention and the conventional method, and the results were also compared with Table 1.

As is clear from Table 1, four people are required in the conventional example. In the present invention, the work amount is 1.5 hours per person (construction efficiency = 13.3 T / person × hour), while the work amount is 2 hours (construction efficiency = 2.5 T / person × hour). Even in the conventional example, the pouring work itself can be performed by one operator, but many man-hours were required for receiving and handling materials. On the other hand, in the present invention, the acceptance of materials, handling, and monitoring of the construction status are made continuous and automated, so the work efficiency can be minimized with a minimum number of people and the work efficiency can be greatly reduced. I was able to improve about 5 times.

 Furthermore, in the past, the generation of dust could not be avoided because the material was handled by the paper bag and the flexible container, but in the present invention, such dust is not generated and the working environment is greatly improved.

 Further, as a matter of course, no difference in the service life of the ladle between the present invention and the conventional example was observed.

〔The invention's effect〕

 As is apparent from the above-described embodiments, the present invention is provided with a storage tank for an amorphous refractory material, a gas transportation device, a kneading device, a feeding device, and a control device for these devices, so that material handling after receiving the material can be performed. By making it continuous, automated, and hermetically sealed, it is possible for one operator to perform pouring work without the generation of dust, and the desired goal can be achieved with a small number of people in a short time, and work efficiency is It will be five times higher, and the effect of improving the working environment can be further enhanced. In addition, it is possible to pour the excellent amorphous refractory material without segregation due to the agitation during air feeding of the material.

[Brief description of drawings]

 FIG. 1 is a system diagram showing the entire system of a casting apparatus for casting an irregular-shaped refractory according to the present invention. 2 ... Storage tank 6 ... Load cell 8 ... Shutoff valve 12 ... Transportation piping 14 ... Intermediate tank 16 ... Water tank 18 ... Mixer 22 ... Load cell 24 ... Shutoff valve 26 ... Shutoff valve 30 ... Molten metal machine 32 ... Conveyor 34 ... Formwork 36 … Swirl chute 40… Measurement device 42… Micro computer

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[Procedure amendment]

[Date of submission] Flat 4.8.28 The title of the invention "Amorphous refractory casting equipment" is changed to "Amorphous refractory construction equipment".

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Izumi Oishi, 1 Kawasaki-cho, Chiba City, Chiba Prefecture, Chiba Steel Works, Ltd. (72) Inventor, Toyohide Yamaguchi, 1 Kawasaki-machi, Chiba City, Chiba Kawasaki Furnace Stock Company, Chiba Inside the office

Claims (1)

[Claims] 1. A molten metal container in which an irregular-shaped refractory is poured. In storage equipment, storage tanks for irregular-shaped refractory materials And a weighing and cutting device, and the weighing and cutting device Gas transport device for the material from the device to the kneading device And mix the transported material with water and knead From the kneading device and the kneading device for the hydrous material, Transportation device and supply device to the metal container, and the melting Measure the height of the upper surface of the poured construction body in the metal container Water content in the measuring device and the kneading device And weighing out based on the measured value of the measuring device Adjusting the cutting amount of the projecting device and each of the above devices And a control device for controlling the operation of Equipment for irregular refractory materials characterized by.