JP3011699U - Slug sampler - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a slag sampler that can reliably collect a good slag sample and that can easily remove the sample. A slag sampler 10 for collecting a sample slag from a slag layer formed on the surface of a molten metal in a metallurgical reaction furnace includes an elongated cylindrical body 20 having a container housing space 21 at one end, and this cylindrical body. And a substantially cylindrical sample container 30 housed in the container housing space. The cylindrical body has a sample inflow port 22 on its side surface that communicates with the container housing space.
The sample container is a decomposable container having a sample inlet port communicating with the sample inlet port of the cylindrical body, and extends at least vertically along the axis of the cylindrical shape to divide the space inside the sample container. It has one partition plate 35a-35c.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a slag sampler for collecting a sample slag from a slag layer formed on the surface of a molten metal in a metallurgical reaction furnace.

[0002]

[Prior art]

 Slag is generated in the process of melting and refining the metal. The main component of slag is an oxide such as silicon or aluminum, and since it has a smaller specific gravity than metal, it floats on the surface of the molten metal to form a slag layer. Information on this slag component is useful in estimating the refining status and improving refining efficiency.

A slag sampler is an apparatus that collects sample slag from a slag layer formed on the surface of molten metal in a melting furnace. A conventional slag sampler is disclosed, for example, in Japanese Utility Model Publication No. 64-7325. As shown in FIGS. 4 and 5, in the slag sampler of the publication, a wire-shaped metal heat-resistant material 91 is wound around the outer circumference of a tube material 90 made of a paper tube or the like to further increase the amount of slag adhered. As described above, the cement 92 is applied between adjacent heat-resistant materials while leaving a part of the outer circumference of each roll of the heat-resistant material. When this slag sampler is attached to a lance and soaked in molten metal in a melting furnace and pulled up, the slag adheres to the portion around which the wire-shaped metal heat-resistant material is wound and is collected.

[0004]

[Problems to be solved by the device]

 In the slag sampler of the same gazette, when the slag sampler is immersed in the molten metal in the melting furnace and pulled up, the slag adhering and collecting portion of the slag sampler must come to the position of the slag layer formed on the surface of the molten metal. I won't. However, the height of the slag layer varies considerably depending on the amount of raw materials and auxiliary materials, the amount of refractory wear in the furnace, and operating conditions. Therefore, when the slag sampler was dipped, the slag adhering and collecting part might not come to the position of the slag layer, and it was not possible to collect the slag. As a countermeasure against this, it is possible to increase the length L of the slag adhering sampling portion so that the slag layer can be reliably sampled even if the height of the slag layer fluctuates, but in this case, the cost of the slag sampler is high. Also, the handling becomes complicated.

Further, even if a simple cylinder is used, when the molten metal particles are collected together with the slag, the molten metal and the slag react in the cylinder, and the collected sample accurately reflects the situation in the melting furnace. I couldn't see it.

Therefore, an object of the present invention is to provide a slag sampler that can reliably collect a good slag sample and that facilitates the extraction of the sample.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a slag sampler for collecting a slag for a sample from a slag layer formed on the surface of a molten metal in a metallurgical reaction furnace, in which a cylindrical body having a container housing space at one end. And a sample container housed in the container housing space of the cylinder, the cylinder has a sample inlet on its side surface that communicates with the container housing space, and the sample container communicates with the sample inlet of the cylinder. A slag container characterized by having at least one partition plate that extends vertically and divides a space in the sample container. Provide a sampler.

[0008]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a vertical sectional view of a temperature probe combined slag sampler according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line 2-2 of the slag sampler of FIG. FIG. 3 is a diagram showing a state in which the collected slag sample is taken out from the sample container.

The slag sampler 10 also serving as a temperature probe shown in FIG. 1 has a tubular shape. When the upper end of the slag sampler 10 is attached to a lance or the like and moved up and down, the lower end of the slag sampler 10 is a molten metal in a metallurgical reaction furnace (for example, molten steel in a converter, ) And then pulled up. In the present invention, the temperature of the molten metal is measured by dipping and pulling in the molten metal, and the sample slag is sampled from the slag layer formed on the metal surface.

The slag sampler 10 includes an elongated cylindrical body 20 formed of a paper tube used as a protective tube of a probe or the like. The cylindrical body 20 is hollow and defines a container accommodation space 21 inside the lower end thereof. A substantially cylindrical sample container 30 is housed in the container housing space 21. A sample inlet 22 is formed on the side surface of the lower end of the cylindrical body 20, and the sample inlet 22 communicates with the container housing space 21.

The sample container 30 is defined by a cylindrical peripheral wall 31, an upper plate 32, and a bottom plate 33, and the peripheral wall 31 is divided into two halves 31a and 31b by a vertically extending surface. is there. The peripheral wall halves 31a and 31b, the upper plate 32, and the bottom plate 33 are not fixed to each other, and the sample container 30 is configured by mounting them in the inner tube 70 described later. I am trying to do it. Therefore, the sample container 30 can be disassembled, which facilitates the removal of the collected sample. A sample inlet 34 is formed near the upper end of the peripheral wall 31. The sample inlet 34 communicates with the sample inlet 22 of the cylindrical body 20, and the slag to be collected is sampled through the sample inlet 22 of the cylindrical body 20 and the sample inlet 34 of the sample container 30. It flows into 30.

As shown in FIGS. 1 and 2, the sample container 30 is further provided with partition plates 35 a, 35 b, and 35 c inside thereof, and the lower ends of the partition plates are attached to the bottom plate 33 by welding or the like. They are fixed and extend in the vertical direction along the cylindrical axis of the sample container 30 so as to divide the space in the sample container 30. The distances l2 and l3 between the partition plates 30a to 35c and the distances l1 and l4 between the partition plates and the peripheral wall on both sides are set to about 5 mm to about 10 mm. The space is divided by the partition plates 35a to 35c into sections having a width of about 5 to about 10 mm.

The partition plates 35a to 35c are iron plates with a thickness of 3 mm, and even if molten metal flows in together with the slag, it can be sufficiently rapidly cooled, and the slag metal reaction can be effectively prevented. A sample that accurately reflects the conditions inside the furnace can be obtained. This cooling effect can be sufficiently obtained even when the thickness of the iron plate is 1 to 5 mm.

Further, an opening 36 is formed in the center of the bottom plate 33 of the sample container 30. Through this opening 36, the temperature detecting part of the in-vessel temperature sensor 40 (for example, the hot junction of the thermocouple) is a space inside the sample container 30. Have been extended to. The in-container temperature sensor 40 is provided to detect that slag has flowed into the sample container 30.

The slag sampler 10 of the present embodiment is provided with a molten metal temperature sensor 50 at its lower end in order to serve also as a temperature probe for measuring the temperature of the molten metal, and the molten metal temperature sensor 50 has a high temperature. It is covered with a protective cap 51 that melts at. The slag sampler 10 further comprises an electrical connector 60 for connecting the wiring from the in-vessel temperature sensor 40 and the molten metal temperature sensor 50.

An inner tube 70 is used to mount the sample container 30, the in-vessel temperature sensor 40, the molten metal temperature sensor 50, and the electrical connector 60 in the tubular body 20. For the inner tube 70, for example, a paper tube made of the same material as the protective tube can be used. A sample inlet 71 is formed on the inner tube 70 on the side surface at the center in the longitudinal direction. The member 61 is inserted into the inner tube 70, and then from the lower end of the inner tube 70, the upper plate 32 of the sample container 30 and the half bodies 31a and 31b of the peripheral wall 31 of the sample container 30 which are combined with each other, The bottom plate 33 of the sample container 30 in which the partition plates 35a to 35c are fixedly installed is inserted in this order to form the sample container 30 in the inner tube 70. At this time, the position of the sample inlet 34 of the sample container 30 and the position of the sample inlet 71 of the inner tube 70 are aligned. Subsequently, the mount member 41 to which the in-container temperature sensor 40 is attached and the mount member 52 to which the molten metal temperature sensor 50 covered with the protective cap 51 is attached are inserted into the inner pipe 70, and these are mounted. To do. Then, the electrical connector 60 is attached to the upper end of the inner pipe 70. The wiring connecting the in-container temperature sensor 40 or the molten metal temperature sensor 50 to the electrical connector 60 is routed through the outer peripheral surface of the inner pipe 70.

The unit formed by assembling the components into the inner pipe 70 as described above is inserted into the cylindrical body 20 which is a protective tube, and at this time, the position of the inlet 22 of the cylindrical body 20 and the unit are unified. Align the inlets of the inlets. After that, the space between the mount member 52 to which the molten metal temperature sensor 50 is attached and the inner peripheral surface of the cylindrical body 10 and the peripheral portions of the respective sample inlets are sealed with refractory cement, and a protective tube is used. The molten metal is prevented from entering the inside of a certain cylinder 20. As a result, the temperature probe combined slag / sampler 10 shown in FIG. 1 is completed.

At the time of use, the temperature probe-combined slag sampler 10 is attached to a holder portion (not shown) at the tip of the lance. An electric connector is provided at the tip of the holder portion, and the electric connector is connected to the electric connector 60 of the slag sampler 10. By raising and lowering the lance with a lance lifting device (not shown) or the like, the slag sampler 10 is immersed in the molten metal in the metallurgical reaction furnace and pulled up. If the sample inlet is submerged in the slag layer formed on the surface of the molten metal during the dipping process, the slag will start to flow into the sample container 30 and the slag will start to flow. It can be confirmed by a sharp rise in the detected temperature of 40. If it is expected that the slag has a high viscosity or the slag layer is thin, stop the lance lowering for a while when the temperature detected by the in-vessel temperature sensor 40 begins to rise rapidly, and It is also possible to allow time for the container 30 to be completely filled with slag. The inflowing slag is cooled and solidified by the peripheral wall 31 of the sample container 30 and the partition plates 35a to 35c.

After the sample container 30 is filled with slag, the slag sampler 10 is further lowered to a position where the molten metal temperature sensor 50 provided at the tip is sufficiently immersed in the molten metal. When immersed in the molten metal, the protective cap 51 of the molten metal temperature sensor 50 melts and the temperature of the molten metal can be measured. At this time, even if the inlet passes through the slag layer and enters the molten metal, the molten metal does not flow into the sample container 30 because the slag in the sample container 30 has already solidified. After measuring the temperature, the slag sampler 10 is pulled up and collected.

After the slag sampler 10 is collected, the cylindrical body 20 and the inner pipe 70, which are protective tubes, are broken and the sample container 30 is taken out. The sample container 30 taken out can be easily disassembled into the two halves 31 a and 31 b of the peripheral wall 31, the upper plate 32, and the bottom plate 33. The slag S solidified in the sample container 30 is obtained in the form of being attached to the periphery of the partition plates 35a to 35c fixed to the bottom plate 33 as shown in FIG. When the solidified slag S is lightly tapped with a hammer or the like, the slag is crushed and taken out, and the slag sample thus recovered may be used for analysis of slag components.

The sample inlet 22 or the sample inlet 34 may be sealed with paper or metal foil having a thickness of 0.1 to 1 mm. As a result, even if there is a thick slag layer in the furnace, the inflow of slag can be blocked until the paper is incinerated or the metal foil is melted, and the slag can be collected from an arbitrary depth position.

[0022]

[Effect of device]

 As explained above, according to the slag sampler of the present invention, it is possible to reliably collect a good slag sample free from the inclusion of metal, etc., and it is possible to easily take out the collected slag sample from the slag sampler. The effect is obtained.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a slag sampler also serving as a temperature probe according to a preferred embodiment of the present invention.

2 is a cross-sectional view of the slag sampler of FIG. 1 taken along line 2-2, showing the sample container in detail.

FIG. 3 is a diagram showing a state in which a slag sample collected by the slag sampler in FIG. 1 is taken out from a sample container.

FIG. 4 is a partially broken sectional view of a conventional slag sampler.

5 is a partially enlarged view of the conventional slag sampler of FIG.

[Explanation of symbols]

 10 Slug Sampler 20 Cylindrical Body 21 Cylindrical Container Housing Space 22 Cylindrical Sample Inlet Port 30 Sample Container 31 (31a, 31b) Sample Container Peripheral Wall 32 Sample Container Top Plate 33 Sample Container Bottom Plate 34 Sample Container Sample Inlet 35a, 35b, 35c Partition plate for sample container

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Kenji Onda 3-28-23 Onitaka, Ichikawa City, Chiba Prefecture Ichikawa Plant, Osaka Oxygen Works (72) Creator Katsuhiro Iwasaki 1-chome, Marunouchi, Chiyoda-ku, Tokyo No. 2 Nihon Steel Pipe Co., Ltd. (72) Inventor Shinichi Wakamatsu 1-2 1-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Steel Pipe Co., Ltd.

Claims (5)

[Scope of utility model registration request] 1. A slag sampler for collecting a sample slag from a slag layer formed on the surface of a molten metal in a metallurgical reaction furnace, the cylinder having a container accommodation space at one end, and the cylinder. And a sample container housed in the container housing space, wherein the cylindrical body has a sample inflow port communicating with the container housing space on a side surface thereof, and the sample container is the sample stream of the cylindrical body. A decomposable container having a sample inlet communicating with an inlet, wherein the sample container further includes at least one partition plate extending vertically to divide a space in the sample container. Slug sampler to do. 2. The slag sampler according to claim 1, wherein the sample container is provided with a temperature sensor at the bottom thereof for detecting that slag has flowed into the sample container. 3. The slag sampler according to claim 1, wherein the partition plate partitions the space in the sample container into a plurality of spaces having a thickness of about 5 mm to about 10 mm. 4. The slag sampler according to claim 1, wherein the sample inlet is sealed with paper or metal foil. 5. The slag sampler according to any one of claims 1 to 4, wherein a molten metal temperature sensor is provided at the one end of the cylindrical body to serve also as a temperature probe.