JPH06201566A - Viscosity measuring apparatus for monolithic - Google Patents

Abstract

PURPOSE:To make it possible to measure viscosity automatically and accurately by providing a rotating device, which rotates a rotary rod, and a torque detector, which detects the frictional force caused by the rotation of a measuring rotor in monolithic refractory. CONSTITUTION:After monolithic refractory is kneaded, a viscosity measuring device 2 is lowered. A measuring rotor 6 at the tip is inserted into the kneaded monolithic refractory. The rotor 6 is started with a rotating device 10. The frictional resistance force of the monolithic refractory, which is received with the rotor 6 at the same time of the starting, is measured with a torque detector 8. The relationship between the torque to be detected and the viscosity is obtained beforehand. Therefore, the torque value is inputted into a converter, which is arranged in the kneading device. The viscosity value is displayed on a display device. The measurement is finished when the rotation of the viscosity 6 is attenuated, and the average value is obtained. After the completion of the measurement, the viscosity measuring device 2 is lifted up to the standy position and waits for the next measurement.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a viscosity measuring device for irregular refractory materials, and more particularly to a viscosity measuring device that can be mechanized and accurately measured, and is widely used for pouring irregular refractory substances into a molten metal container. it can.

[0002]

2. Description of the Related Art When constructing a refractory material in a molten metal container, a mold (also called a core) is placed at a predetermined position of the container,
Recently, a so-called pouring construction device and construction method, in which an irregularly shaped refractory material is poured between the formwork and a permanent refractory material to form a construction body which is not different from that at the time of brick construction, have been widely used. It was Regarding the casting construction of irregular-shaped refractory, for example, Japanese Patent Publication No. 51-21363 or Japanese Patent Publication No. 6
The technique is disclosed in 1-2870 and the like. However, it is difficult to say that these techniques are aimed at reducing the number of working steps and improving the working environment commensurate with the need for a large-sized device, and there are problems. In other words, in order to reduce the number of workers, time, resources and work environment by improving the equipment for pouring work, it is the most important factor that the pouring work is carried out uniformly according to the desired target value. However, for example, to control the characteristics of the pouring material, the pouring material of each batch kneading unit is manually sampled and the flow is measured (JIS R5201, 9.7).
Performing the term flow value test method) requires a lot of man-hours and time, and errors occur due to variations in the measurer, and there is a problem at present.

The reason for measuring the characteristics of the pouring material (fluidity measurement) for each batch kneading unit is that the brands of the pouring material are different (differences due to aggregate, particle size composition, binder type, etc.) and quality at the manufacturer. It is necessary to carry out the measurement for each batch because the characteristics of the pouring material (flowability) after kneading vary greatly depending on the variation of the mixing temperature, the temperature at the time of kneading, the temperature of the added water, the temperature of the container to be constructed, etc. . It is very important to sample the pouring material during kneading in each batch and measure the viscosity in order to understand the characteristics of the pouring material, which is the most important factor in pouring construction of irregular refractory.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a viscosity measuring device for an indefinite refractory material which can automatically and accurately measure the viscosity.

[0005]

The gist of the present invention is as follows. That is, the measurement rotor immersed in the amorphous refractory after kneading, the rotating rod for holding the measuring rotor, the rotating device for rotating the rotating rod, and the friction resistance due to the rotation of the measuring rotor in the irregular refractory. A torque detector for measuring a force, and a viscosity measuring device for an indefinite refractory material.

The details of the present invention will be described with reference to the embodiment shown in FIG. The viscosity measuring device 2 includes a measuring rotor 6 below the rotating rod 4, and is composed of a torque detector 8, a rotating device 10 and a coupling 12 above the rotating rod 4. A casing 16 supported by a suspension rod 14 is provided outside the measuring rotor 6. As the aspect of the measurement rotor 6, various shapes are used depending on the properties of the amorphous refractory to be measured. 2 is a simple cylindrical shape, FIG. 3 is a spiral groove 18 on the surface, FIG. 4 is a vertical groove 20, and FIG.
Has a knurled groove 22, and FIG. 6 has a small protrusion 24. In addition to this, an impeller, a propeller, or the like can be considered as a mode of the measurement rotor 6. It is necessary to select these aspects of the measuring rotor 6 so as to prevent slippage between the measuring rotor 6 and the irregular refractory in accordance with the irregular refractory whose viscosity is to be measured so that the measuring rotor 6 does not idle.

A case where the viscosity measuring device 2 of the amorphous refractory material of the present invention is installed in the kneading device 26 will be described with reference to FIG. A refractory inlet 28 and an added water adjusting device 30 are provided above the kneading device 26. The viscosity measuring device 2 is a pedestal 3
2 is installed so as to be able to move up and down via a holding and lifting device 34. A signal is sent from the torque detector 8 of the viscosity measuring device 2 to the converter 36 and the display 38.

[0008]

To measure with the apparatus of the present invention having the above-mentioned constitution, after kneading the amorphous refractory material, the viscosity measuring apparatus 2 is lowered,
Insert the measurement rotor 6 at the tip into the kneaded amorphous refractory, start it by the rotating device 10, and measure the friction resistance of the kneaded amorphous refractory received by the measurement rotor 6 at the same time with the start-up by the torque detector 8. . The detected torque value is input to the converter 36 and is displayed as a viscosity value on the display 38 because the relationship with the viscosity is obtained in advance. The measurement is completed when the rotation of the measurement rotor 6 is attenuated and reaches an average value, which is about 10 seconds, and after the measurement is completed, the viscosity measuring device 2 rises to the standby position and stands by for the next measurement. .

Samples No. A, No. B and No. C were tested using the spiral groove measuring rotor of the present invention against alumina-spinel low cement amorphous refractories used in ladle ladle. Fig. 8 shows the change in the viscosity value when the viscosity was measured, and Fig. 9 shows the relationship between the viscosity value and the conventional fluidity measurement value (JIS R5201, item 9.7 flow value test method). It was shown to. The temperature at the time of implementation was 27 ° C.
Met. As is clear from FIG. 8, the frictional resistance of the amorphous refractory, that is, the viscosity value, is gradually attenuated to reach the equilibrium, so that the equilibrium value allows the viscosity value to be measured promptly and with excellent accuracy.

Further, since it is clear from FIG. 9 that the viscosity value and the flow value have a very high correlation, the fluidity can be accurately measured by the present invention. Further, FIG. 10 shows the relationship between the viscosity value and the water addition ratio in the above embodiment. Since the viscosity value and the water addition ratio of the present invention have a high correlation from FIG. 10, the viscosity value can be utilized for the water amount adjustment.

[0011]

EXAMPLES Using the casting apparatus disclosed in Japanese Utility Model Laid-Open No. 63-60894 having a capacity of 20 tons, casting of an indefinite refractory material was performed by the following two methods. At that time, the ladle molten steel amount was 255 t, the construction weight was 20.0 t, the kneading amount in one batch was 2.0 t, etc., but the conditions were the same, but the viscosity was measured by the device of the present invention in the examples of the present invention. Was performed by a person who concurrently works with other jobs, and in the conventional example, one dedicated operator performed sampling and measurement. Table 1 compares the measured work amount of viscosity and the measured value converted into a flow value, the construction time, and the like in both examples.

[0012]

[Table 1] As can be seen from Table 1, the working example can reduce the working amount of viscosity measurement to 1/3 of the conventional one. In addition, since errors due to conventional manual work are reduced and accurate measurement is possible, it is possible to construct amorphous refractory with excellent quality and little fluctuation,
The life of the ladle was greatly improved compared to the conventional example. Furthermore, the pouring work time per pot can be shortened from 2.0 hours in the conventional example to 1.5 hours because the measurement and adjustment are performed quickly in the example.

[0013]

As is apparent from the above examples, the present invention immerses a measuring rotor in an amorphous refractory after kneading, measures the frictional resistance in the irregular refractory, and measures the viscosity from the torque value. By doing so, the following effects could be achieved as compared with the conventional manual measurement of viscosity. (B) The amount of measurement work could be reduced to 30% of the conventional amount. (B) Since the viscosity was measured accurately, it was possible to properly adjust the irregular refractory material, improve the quality, and extend the life of the work. (C) Since the viscosity was measured quickly, the pouring work time was shortened and the productivity was improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the constitution of a viscosity measuring device for an amorphous refractory material according to the present invention.

2-6 show various aspects of the measurement rotor of the present invention,

FIG. 2 is a front view of a simple cylindrical measuring rotor of the present invention.

FIG. 3 is a front view of the spiral groove measuring rotor of the present invention.

FIG. 4 is a front view of a vertical groove measuring rotor of the present invention.

FIG. 5 is a front view of the knurling groove measuring rotor of the present invention.

FIG. 6 is a front view of a measuring rotor having small protrusions of the present invention.

FIG. 7 is a front view showing a kneading device to which the viscosity measuring device of the present invention is attached.

FIG. 8 is a diagram showing changes with time of measured viscosity values in Examples of the present invention.

FIG. 9 is a diagram showing a relationship between a viscosity value and a flow value in an example of the present invention.

FIG. 10 is a diagram showing a relationship between a viscosity value and a water addition ratio in an example of the present invention.

[Explanation of symbols]

 2 Viscosity measuring device 4 Rotating rod 6 Measuring rotor 8 Torque detector 10 Rotating device 12 Coupling 14 Hanging rod 16 Casing 26 Kneading device 28 Additive inlet 30 Added water adjusting device 32 Stand 34 Holding lifting device 36 Converter 38 Indicator

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[Procedure amendment]

[Submission date] September 6, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the constitution of a viscosity measuring device for an amorphous refractory material according to the present invention.

FIG. 2 is a front view of a simple cylindrical measuring rotor of the present invention.

FIG. 3 is a front view of the spiral groove measuring rotor of the present invention.

FIG. 4 is a front view of a vertical groove measuring rotor of the present invention.

FIG. 5 is a front view of the knurling groove measuring rotor of the present invention.

FIG. 6 is a front view of a measuring rotor having small protrusions of the present invention.

FIG. 7 is a front view showing a kneading device to which the viscosity measuring device of the present invention is attached.

FIG. 8 is a diagram showing changes with time of measured viscosity values in Examples of the present invention.

FIG. 9 is a diagram showing a relationship between a viscosity value and a flow value in an example of the present invention.

FIG. 10 is a diagram showing a relationship between a viscosity value and a water addition ratio in an example of the present invention.

[Explanation of Codes] 2 Viscosity Measuring Device 4 Rotating Rod 6 Measuring Rotor 8 Torque Detector 10 Rotating Device 12 Coupling 14 Hanging Bar 16 Casing 26 Kneading Device 28 Additive Input Port 30 Additive Water Adjusting Device 32 Stand 34 Holding Lifting Device 36 Converter 38 Display

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

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Claims (1)

[Claims] 1. A measuring rotor immersed in an amorphous refractory after kneading, and a rotating rod holding the measuring rotor,
Viscosity measurement of an indefinite refractory, comprising: a rotating device that rotates the rotating rod; and a torque detector that measures a frictional resistance force caused by rotation of the measuring rotor in the indefinite refractory. apparatus.