JPH0617500B2 - Simultaneous measurement of substances in different layers - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for simultaneously measuring the constituents of substances in each layer in a converter for a plurality of layers in the height direction.

[Conventional technology]

Conventionally, to measure the components of substances located in each layer such as gas layer, slag layer and metal layer in a converter, use a probe provided with a measuring part such as various sensors and samplers at the tip, and position the measuring part in each layer. By each layer.

[Problems to be solved by the invention]

The state of each layer in the converter during blowing is changing from moment to moment, and the chemical reactions in each layer are related to each other. It is increasingly recognized that it is preferable to simultaneously measure the reaction state of each layer such as a bed, a slag layer, and a gas layer, and for that purpose, the development of a method that enables simultaneous measurement of substances in different layers in a converter is studied. It is strongly desired among people. However, in the conventional probe, there is only one measurement part, or even if there are multiple measurement parts, the distance between the measurement parts is extremely close, and therefore it is not possible to measure the substances in different layers at the same time. There wasn't. Further, no specific method has been studied to enable simultaneous measurement of substances in different layers.

[Means for solving problems]

The present invention has been made in view of the present situation, and enables simultaneous analysis of substances in the different layers in the height direction in the converter to enable a comprehensive analysis of the reaction in the converter and the operation of the converter. The purpose of this study is to obtain useful data for the purpose of constructing a probe with multiple measuring parts at multiple points in the length direction and inserting the probe vertically into the converter. At the same time, each measurement unit is positioned at a measurement target of a different layer, and the constituents of the substance located in the different layers in the height direction inside the converter are measured simultaneously.

[Work]

According to the method for simultaneously measuring substances in different layers according to the present invention, since the components of substances in different layers can be simultaneously measured in a plurality of layers by one dipping operation, the reaction state of each layer, which changes from moment to moment, is correlated and measured. Therefore, it is possible to obtain useful data for improving the efficiency of the converter operation.

〔Example〕

Next, details of the present invention will be described based on illustrated embodiments.
FIG. 1 is a sectional view showing the structure of an embodiment of a probe used to carry out the present invention. In the figure, reference numeral 1 is a probe main body, and a lower measurement unit 2 is provided at the tip, and the lower measurement unit 2 is also provided.
The upper measurement unit 3 is attached at a position spaced a predetermined distance from.

The separation distance l between the lower measurement unit 2 and the upper measurement unit 3 is appropriately determined depending on the measurement target. For example, when the metal layer and the slag layer are measured, the lower measurement unit 2 is made of metal as shown in FIG. When the upper measurement unit 3 is set at a predetermined position in the layer A so as to be positioned at a predetermined position in the slag layer B, and when the slag layer and the gas layer are measured, as shown in FIG. Is set at a predetermined position in the slag layer B, while the upper measurement unit 3 is set at the gas layer C.

Since what is shown in FIG. 1 is a probe intended for simultaneous measurement of the metal layer A and the slag layer B, the lower measurement unit 2 is the metal layer A and the upper measurement unit 3 is the slag layer when immersed. The configuration is based on the assumption that it is located at B. The lower measurement unit 2 is composed of an insert 4 and a vacuum pin sampler 5 in which a thermocouple, an oxygen concentration battery and the like are integrally incorporated, and has a configuration capable of measuring the oxygen partial pressure of metal and sampling the metal. On the other hand, the upper measurement unit 3 is composed of a sampler 7 having an inlet 6 on a side wall of the probe body 1 and an oxygen concentration battery 8 provided in the sampler 7, and measures oxygen partial pressure of the slag and samples of the slag. It has a configuration that enables collection. The insert 4 and the vacuum pin sampler 5 are those suitable for metal measurement, and the sampler 7 and the oxygen concentration battery 8 are those suitable for slag measurement. In particular, the sampler 7 is made of ceramics because it is necessary to gradually cool the collected slag, and the molten steel side electrode 9 of the oxygen concentration battery 8 is a platinum electrode suitable for slag measurement. It is of course possible to arrange other samplers and other sensors in the lower measurement unit 2 and the upper measurement unit 3.

Although it has been described above that the lower measurement unit 2 and the upper measurement unit 3 are located in different layers, the metal layer A and the slag layer B are not clearly separated by the boundary, and the metal layer A and the slag layer B are not clearly separated.
Since there is a region where both are mixed, and the metal layer A and the slag layer B are violently flowing due to blowing, care must be taken in positioning the measurement part to each layer. That is, the separation distance l between the lower measurement unit 2 and the upper measurement unit 3
Should take this into account. The inventor tried various experiments, set the distance between the lower measurement part 2 and the upper measurement part 3 to about 30 cm to 40 cm, and measured the metal and slag near the metal-slag interface. It was possible to obtain the measurement data that was remarkably shown. The separation distance l between the lower measurement unit 2 and the upper measurement unit 3 is variously set depending on the measurement target, and for example, the metal in the vicinity of the metal-slag interface is measured by the lower measurement unit 2 and the upper measurement unit 3 is measured.
When measuring the slag near the gas / slag interface with,
The distance l between the two is approximately 200c, which is approximately the same as the thickness of the slag layer.
It is preferably about m. Although not shown, it is also possible to provide three or more measuring parts, for example, a new intermediate measuring part is formed between the lower measuring part 2 and the upper measuring part 3, and
It is also appropriately adopted to measure the separation distance between the respective measuring parts so that the above-mentioned measuring parts are positioned at the predetermined positions of the metal layer, the slag layer and the gas layer during immersion.

In order to measure each layer in the converter by using the probe shown in FIG. 1, first, the probe is vertically inserted into the converter, the lower measuring unit 2 is placed on the metal layer A, and the upper measuring unit is placed. Three
Are located in the slag layer B. At this position, the probe is stopped for a predetermined time, the oxygen partial pressure of the metal is measured and the sample is sampled by the insert 4 of the lower measurement unit 2 and the vacuum pin sampler 7, and the oxygen concentration battery 8 and the sampler 7 of the upper measurement unit 3 are connected. The oxygen partial pressure of the slag is measured and the sample is collected. By doing so, it is possible to measure the oxygen partial pressures in the metal layer A and the slag layer B at the same time and to sample, and it is possible to simultaneously know the progress of the chemical reaction in each layer in the converter. And as a result,
It becomes possible to know the mutual relations of the chemical reactions in each layer in the converter, and it becomes possible to obtain useful data for comprehensively understanding the reactions in the converter.

〔The invention's effect〕

The method for simultaneously measuring substances in different layers according to the present invention comprises a probe provided with a plurality of measuring parts at multiple points in the longitudinal direction, and inserting the probe in the converter in the vertical direction, By locating the substance in each layer in the height direction inside the converter at the same time by positioning it as the measurement target of different layers, it is possible to know the relation of the chemical reaction of each layer inside the converter that changes moment by moment. It is possible to obtain useful data for comprehensively understanding the reaction in the converter. or,
Since the component of the substance in the different layer can be measured by one dipping operation, the number of dipping operations of the probe can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view of a probe for carrying out the method for simultaneously measuring substances in different layers according to the present invention, and FIGS. 2 and 3 are diagrams for explaining the method for simultaneously measuring substances in different layers according to the present invention. It is explanatory drawing which shows the state immersed in each layer in a furnace. A: Metal layer, B: Slag layer, C: Gas layer, 1: Probe main body, 2: Lower measurement part, 3: Upper measurement part, 4: Insert, 5: Vacuum pin sampler, 6: Inlet port, 7: Sampler , 8: oxygen concentration battery, 9: molten steel side electrode.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Internal reference number FI Technical display location G01N 33/20 E 7906-2J (72) Inventor Hiroaki Kosaka 1-1264 Minami Beppu Town, Settsu City, Osaka Prefecture Yamasato Electro Knight Co., Ltd. (72) Inventor Ryo Mochizuki 1264 Minami Beppu Town, Settsu City, Osaka Prefecture Yamasato Electro Knight Co., Ltd.

Claims (3)

[Claims] 1. A probe having a plurality of measuring parts at multiple points in the length direction is constructed, the probe is vertically inserted into a converter, and each measuring part is positioned on a measurement target in a different layer. A method for simultaneous measurement of substances in different layers by simultaneously measuring the components of substances located in different layers in the height direction of a converter. 2. The method according to claim 1, wherein one of the measuring parts is located in the metal layer and the other is located in the slag layer.
The method for simultaneously measuring substances in different layers according to the item. 3. The method for simultaneously measuring substances in different layers according to claim 1, wherein one of the measuring parts is located in the slag layer and the other is located in the gas layer.