JPS5824846A - Tester for high-temperature property of iron-making raw material - Google Patents

Abstract

PURPOSE:To provide a fusing drop temperature detector whih records and processes a temperature measuring signal, produces a drop signal from a drop detector, and checks a raw material in a reacting receptacle for temperature at a current point of time to record it. CONSTITUTION:A drop point of time is automatically detected by a fusion drop detector 17, such as radiation thermometers, optical pyrometers, which monitors a fusion drop point of time of a sample raw material 3, wherewith a reacting receptacle is filled, as a visual field surface of a drop position of a drop substance collecting table 14. By means of a drop detecting signal 21 from the device 17, the drop substance collecting turning table 14 of a drop substance sampling device 16, mounted under the device 17, is automatically turned for starting by a rotary table controller 18 and a drive motor 15, the following drop substance positions are located in order immediately under the receptacle 2 to collect drop substances in a time-series manner. Temperature of a sampling raw material, with which the receptacle 2 is filled, is normally measured by a raw material temperature measuring device 10, the signal is inputted to a fusion drop temperature detector 19 which detects the drop temperature of the sampling raw material.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a steel manufacturing system equipped with an automatic detection device for the dropping start timing and dropping temperature during softening and melting of high-temperature property tests of sintered ore, iron ore, etc., which are blast furnace charges, for example. This relates to a high-temperature property testing device for raw materials.

Generally, raw materials charged from the top of the blast furnace are preheated.

It reaches the lower hearth of the blast furnace after undergoing reduction, softening and shrinkage, and melting and dripping processes. The temperature history during this period ranges from room temperature to 1600°C. The properties of blast furnace charge have a great influence on blast furnace operational performance. Among these, the behavior of the charge from the softened cohesive zone to the melted dripping zone in the furnace is an important factor that controls the furnace condition, so the properties of the charge are investigated using various test methods. One of these test methods is the high-temperature property test method for raw materials, which reduces the raw material by applying conditions that simulate the atmospheric conditions in a blast furnace to the test raw material placed in a reaction tube in an electric furnace. , softening contraction.

This is a test method to evaluate the melting and dripping situation. Therefore, the atmospheric gas is a reducing gas, and the temperature is from room temperature to 1600°C.

In the high-temperature property testing device, the timing and dropping temperature of the molten test Kawahara Po 9I placed in the reaction tube in the electric furnace can be controlled by the operator with the naked eye through a drip monitoring window provided at the bottom of the device. The presence or absence of dripping is monitored at the time when dripping is confirmed, and the reading of the furnace thermometer set inside the reaction tube of the device is read from the recorder or indicator, and the value is used to determine the timing of melting and dripping of the test raw material. Generally, the temperature is controlled, and at that point the droplet sampling table in the droplet sampling chamber installed at the bottom of the device is moved manually from the outside or by electric operation.

However, among the high-temperature properties of the steelmaking raw material in the blast furnace charge, the melt dripping behavior differs depending on the brand 9 composition, etc., and it is difficult to detect the initial dripping rate of the drippings that drop instantly. The timing of confirmation of the timing is often lost, and errors occur in determining the melt dropping timing and dropping temperature, which poses a problem in test accuracy.

The present invention solves this problem, and provides a high-temperature property testing device for steelmaking raw materials that can automatically detect the dropping temperature at 9 molten dropping times even in high-temperature property testing of steelmaking raw materials with different molten dripping behaviors. This is a high-temperature property testing device for steelmaking raw materials in which a reaction vessel is enclosed in a pressure-resistant and heat-resistant structure having a heating device, which includes: a) melting of the test raw material filled in the reaction vessel; A molten dripping detection device for detecting dripping, Ili The dripping detection signal from the above-mentioned detection means automatically starts rotating the dripped sample rotary table in the dripped sampling chamber installed below the reaction vessel, and detects molten dripping. a sampling device that samples the substance in chronological order; C) a temperature measuring device for the test raw material filled in the reaction container;
A molten dripping detection device that introduces a measurement signal from the temperature measurement device and outputs the measured temperature of the sample inside the reaction vessel at the time of introduction of the dripping detection signal from the detection means. Properties 3- Test equipment.

Examples thereof will be described below based on the drawings.

FIG. 1 shows a high-temperature property testing apparatus for iron-making raw materials, which is equipped with a device that automatically detects the melt dropping timing and temperature in high-temperature property testing of blast furnace charge materials. Reaction container 2 in the test device
The loaded test raw material 3 is subjected to an arbitrary load by a loading device 4, and placed in a state similar to the state in which it is loaded into a blast furnace. The reaction vessel 2 is surrounded by a heat generating element 5 made of graphite close to the reaction tube 1 and the outside thereof, a heat insulating material 6 surrounding the heat insulating material 6, and an outermost layer made of steel plate (outer skin) surrounding the heat insulating material 6. )7 and
A pressure-resistant and heat-resistant structure composed of an enclosure frame 9 having a reactive gas discharge pipe 9a and a cylindrical body 8 having 18 reactive gas inlets a is installed on top of this outer layer.

Reducing gas equivalent to the atmospheric conditions in the blast furnace is sent from the reaction gas inlet 8a of the cylinder 8, and charged into the reaction vessel 2 by the shaft heating element 5 while being exhausted through the reaction gas outlet 9a. The raw material is heated. In addition, a thermocouple 10a is placed on the top surface of the test raw material 3.
The high-temperature property test temperature is controlled by the temperature control device 12.13 of the heating element 5 using the electric furnace temperature control thermometer 11 close to the measuring device 10 and the heating element 5.

The present invention uses radiation temperature monitoring to monitor the point of melting and dripping of the test raw material 3 filled in the reaction vessel 2 with the dripping position of the dripping material collection (rotary) table 14 as the viewing surface in such a high-temperature property testing apparatus for raw materials for iron making. Total.

The point of dripping is automatically detected by a molten dripping detection device 17 such as an optical pyrometer, and the dripping detection signal 21 from this detection device 17 is used to perform sampling by the dripped material sampling device 16 installed at the bottom of the device. The rotation of the drip collection rotary table 14 placed in the room is automatically started by the rotary table control device 18 and the drive motor 15, and the next drip collection position is brought directly below the reaction vessel 2 in sequence. and collect the molten drippings in chronological order. The temperature of the test raw material filled in the reaction vessel 2 is constantly measured by the raw material temperature measuring device 10, and the signal thereof is introduced into the melt dropping temperature detecting device 19. The device 19 records and processes the temperature measurement signal, and also provides a dropping signal from the dropped object detection device 17. The device 19 also checks and records the temperature of the raw material in the reaction vessel at that time, and records the temperature. This is detected as the dropping temperature of the test raw material, and is output and displayed on the display device 20, for example.

It should be noted that any dropped object detection device that has this function is applicable. The installation position may be any position as long as it can detect all the droplets.In this embodiment, a non-contact type temperature sensor is used as the dripping object detection device.

As is clear from the above description, the present invention is as follows: For example, in high-temperature property tests of steelmaking raw materials with different molten dripping behaviors, even if the raw materials have different dripping times, the initial dripping timing and the timing of the drippings at that point. The dropping temperature can be automatically, easily and accurately controlled, and extremely accurate test results can be obtained in high-temperature property tests of steelmaking raw materials. In addition, the operator's need to monitor the timing of dripping can be omitted, reducing the operator's strain level 5 workload, which has a significant labor-saving effect.

[Brief explanation of drawings]

Fig. 1 is an embodiment of the present invention, and is an overall schematic diagram showing a high-temperature property testing device for steelmaking raw materials, which is equipped with a device that automatically detects the timing of molten dripping, temperature, etc. in high-temperature property testing of blast furnace charge materials. FIG. DESCRIPTION OF SYMBOLS 1... Reaction tube, 2... Reaction container, 3... Test raw material 1.4... Loading device, 5... Heating element, 6... Heat insulation, 7... Outer skin, 8.8a... Reaction gas inlet,
9. '9a...Reaction gas outlet, 10...Temperature measuring device, 11...Electric furnace temperature control thermometer, 12.1.3
...Temperature control device, 14... Rotary table, 15...
・Drive motor, 16...Dropped material sampling installed,
17... Melted dripping object detection device, 18... Rotary table control device, 19... Temperature detection device, 20... Display device. Patent applicant Representative patent attorney Tomoyuki Yafuki (and 1 other person)

Claims (1)

[Scope of Claims] A high-temperature property testing device for steelmaking raw materials in which a reaction vessel is enclosed in a pressure-resistant and heat-resistant structure having a heating device, comprising: a) a device for detecting molten dripping of the test raw material filled in the reaction vessel; an upper detection device; b) automatically starting rotation of a drip sampling rotary table in a drip sampling chamber installed below the reaction vessel in response to a drip detection signal from the detection means;
a sampling device for sampling the melt droplets Tfh in time series; (i) a temperature measuring device for the test raw material filled in the reaction container;
A molten dripping temperature detection device that introduces a measurement signal from the temperature measurement device and outputs the measured temperature of the sample in the reaction vessel at the time of introduction of the dripping detection signal from the detection means. High temperature property testing equipment.