JPH0638317Y2 - Auxiliary tool for sensor of horizontal cylindrical converter - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) Auxiliary tool to be attached to a sensor for measuring oxygen partial pressure and temperature of molten metal during blowing of a horizontal cylindrical converter used for smelting copper or nickel Regarding

(Prior art) In the dry smelting of copper or nickel, measuring the oxygen partial pressure and temperature of the molten metal enables the stable operation in order to know the progress of the reaction in the furnace and use it as a guideline for operation. In order to do, it is important and important to obtain the necessary information. Even in the operation of a horizontal cylindrical converter (PS converter), it is important to obtain information on the oxygen partial pressure and temperature of the molten metal during blowing. Attempts have been made to insert the sensor into the molten metal, but each method had the following problems.

(1) Measurement from furnace opening The furnace opening of the converter that receives the copper matte or nickel matte is covered with a hood during blowing and functions as an outlet for high-temperature exhaust gas containing SO ₂ , so the sensor is installed from here. When it was inserted into the inside, free air entered, making it difficult to control the furnace pressure, and there were problems such as a decrease in SO ₂ concentration in the exhaust gas and an increase in the exhaust gas amount. Also, there is a problem that a large amount of splash is generated in the furnace due to the blowing of reaction air, and the sensor injection machine (pipe) is damaged. Also, if the pipe is extremely long (7 m or more) There was also the problem of not reaching.

(2) Measurement from tuyere The oxygen probe and thermometer for measuring oxygen partial pressure used as sensors are made of very thin ceramics so that the measurement can be completed in a short time. However, since the blocking steel ball provided in the tuyere in order to prevent the reaction air from leaking outside is destroyed before being pushed upward, it cannot be used as it is. One method is to use the one that covers the sensor part with a metal cap, but the cost of the sensor increases,
Moreover, there is a problem that the sensor does not function unless the metal cap is melted.

(Problems to be solved by the present invention) The present invention solves the above-mentioned conventional problems, and uses a commercially available sensor such as an oxygen probe or a thermometer to simplify the operation without using large-scale equipment. It is an object of the present invention to provide a means capable of measuring the oxygen partial pressure and temperature of molten metal in a horizontal cylindrical converter during blowing without disturbing the operation.

(Means for Solving the Problems) In order to solve the above problems, the present invention is, firstly, an auxiliary tool to be attached to a sensor inserted from a tuyere during blowing of a horizontal cylindrical converter. A pipe whose inner diameter is substantially equal to the outer diameter of the sensor connecting pipe, and whose outer diameter is substantially equal to the inner diameter of the tuyere, and when the pipe is inserted into the tuyere together with the sensor, the pipe pushes the tuyere closing steel ball upward. The auxiliary tool for a sensor of a horizontal cylindrical converter having a stopper provided on the outer circumference of the pipe so as to enter the tuyere for a length that does not block the communication part of the blower pipe to the tuyere.

Secondly, the present invention is an auxiliary tool to be attached to the sensor inserted from the tuyere during blowing of a horizontal cylindrical converter, the inner diameter of which is larger than the outer diameter of the sensor connecting pipe and the outer diameter of which is the tuyere. A pipe having an inner diameter substantially equal to the inner diameter of the pipe, a tip pipe having an inner diameter connected to the tip of the pipe substantially equal to the outer diameter of the sensor connecting pipe, and an outer diameter smaller than the inner diameter of the tuyere; Provided on the outer circumference of the pipe so that when inserted into the tuyere, the pipe pushes up the tuyere-blocking steel ball upward and enters the tuyere by a length that does not block the communication part of the blower pipe to the tuyere. It is an auxiliary tool for a sensor of a horizontal cylindrical converter equipped with a stopper.

(Operation) Since the sensor auxiliary tool of the horizontal cylindrical converter of the present invention is configured as described above, the sensor connecting tube is inserted into the sensor auxiliary tool so that the sensor part at the tip does not protrude. Then, when it is inserted into the tuyere of the converter during blowing, the tip pipe and the steel ball for closing the tuyere are first pushed up by the pipe, and the sensor connecting pipe can be inserted into the tuyere without damaging the sensor part. Furthermore, if the sensor connecting pipe and the sensor auxiliary tool are pushed into the inside of the converter, the sensor auxiliary tool will be stopped by the stopper provided on the outer circumference of the sensor auxiliary tool pipe, and only the sensor connecting pipe will penetrate into the furnace and the tip sensor The measurement is performed after the part penetrates into the molten metal in the furnace. At that time, since the pipe of the auxiliary tool for the sensor does not block the connection part of the air blow pipe to the tuyere, the air blown from the tuyere into the furnace is from the gap between the sensor connection pipe or the tip pipe and the inner wall of the tuyere. Since it is continuously performed, the molten metal in the furnace does not enter the tuyere.

(Embodiment) FIG. 1 is a longitudinal sectional view showing a first embodiment of an auxiliary tool for a sensor of the present invention, and FIG. 2 is a side view thereof. FIG. 3 is a vertical sectional view of a second embodiment of the present invention. FIG. 4 is a partial cross-sectional view of the sensor and the sensor holder, and FIG. 5 is a cross-sectional view of the tuyere of the horizontal cylindrical converter.

In FIG. 4, 1 is a sensor part and 2 is a sensor connecting pipe. A handle 3 for handling is provided on the side of the sensor holder on which the sensor connecting pipe 2 is not connected. Further, in FIG. 5, 4 is a shell of a horizontal cylindrical converter, and 5 is a refractory brick lined inside the furnace. The converter tuyere has a tuyere pipe 6 penetrating the shell 4 and the refractory brick 5, and a tuyere box 7 fixed to the shell 4 having a through hole having the same inner diameter as the tuyere pipe 6 in a straight line.
It consists of and. Reference numeral 8 denotes a closing steel ball that normally closes the furnace outside opening of the tuyere box at the position A, and is configured to be pushed up to the position B when pushed from the outside. Reference numeral 9 is a blower tube for supplying reaction air to the tuyere, and 10 is a communicating portion between the tuyere and the blower tube.

Next, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. Reference numeral 11 is a pipe whose outer diameter substantially matches the inner diameter of the tuyere, and whose inner diameter substantially matches the outer diameter of the sensor connecting pipe 2.
Therefore, the pipe 11 can be inserted into the through hole of the tuyere box 7, and the sensor connecting pipe 2 can be inserted inside the pipe 11. Reference numeral 12 is a stopper provided on the outer circumference of the pipe 11, and the stopper 12 is provided at a position at a constant distance l ₁ from one end of the pipe 11, and l ₁ is point c and point d in FIG. Is greater than the distance between the points b and d
Decide less than the distance between points. Reference numeral 13 is a handle fixed to the other end of the pipe 11.

Next, a second embodiment of the present invention will be described with reference to FIG. When the sensor connecting pipe 2 is particularly thin, as shown in FIG. 3, a pipe 14 having an outer diameter substantially the same as the inner diameter of the tuyere and having an inner diameter larger than the outer diameter of the sensor connecting pipe 2, 14
And a tip pipe 15 having an outer diameter smaller than the tuyere inner diameter and an inner diameter substantially equal to the outer diameter of the sensor connecting pipe 2. In that case, the stopper 12 is the tip pipe of the pipe 14.
The distance l ₁ from the connection with 15 is the point c and d in FIG.
It is provided at a position larger than the distance between the points and smaller than the distance between the points b and d. And stopper 12 and tip pipe 15
The distance l _{2 from} the tip of the point may be larger than the distance between the points b and d in FIG.

Next, a state in which the sensor auxiliary tool of the present invention is used will be described. In the case of the first embodiment shown in FIG. 1, the sensor connecting pipe 2 is inserted into the pipe 11 from the side where the handle 13 is attached. In that case, the sensor unit 1 is prevented from protruding from the tip of the pipe 11. Next, the pipe 11 and the sensor connecting pipe 2 are inserted into the through hole of the tuyere box 7 from the outside of the furnace. Then, the pipe 11 pushes the obstructing steel ball 8 to the B position,
It reaches the left from the point c and the right from the point b in the figure, and the stopper
It stops by engaging 12 with point d. If the sensor connecting pipe 2 is pushed further in, the sensor connecting pipe 2 will be pipe 11.
It slides inside and moves to the inside of the furnace, and the sensor section 1 reaches the inside of the molten metal in the furnace for measurement. At this time, the pipe 11 is the fifth
Since it is on the right side of the point b in the figure and does not block the communication portion 10, the air blowing is not obstructed, and the outer diameter of the sensor communication pipe 2 inserted into the tuyere pipe 6 is smaller than the inner diameter of the tuyere. Therefore, the air is continuously sucked into the furnace through the gap between the two, and the in-furnace molten metal is prevented from entering the tuyere pipe 6. The same applies to the case of using the sensor assisting tool of the second embodiment shown in FIG. It is pushed up and the pipe 14 stops to the right of point b in FIG. And even if the tip pipe 15 reaches the left side from the point b, the tip pipe 15
Since the outer diameter of is smaller than the inner diameter of the tuyere, the blowing of air into the furnace is continued as in the case of the first embodiment, and the tuyere pipe 6 for the molten metal is continued.
Intrusion is prevented.

(Effects of the Present Invention) As described in detail above, when the auxiliary tool for the sensor of the horizontal cylindrical converter of the present invention is used, a commercially available sensor is used to blow the air from the tuyere of the converter. The effect is that the oxygen partial pressure and temperature can be measured at any time. Further, there is also an effect that the measurement can be easily performed without requiring a large-scale device, and the converter operation is not adversely affected.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the sensor assisting tool of the present invention, and FIG. 2 is a side view thereof. FIG. 3 is a vertical sectional view of a second embodiment of the present invention. FIG. 4 is a partial cross-sectional view of the sensor and the sensor holder, and FIG. 5 is a cross-sectional view of the tuyere of the horizontal cylindrical converter. DESCRIPTION OF SYMBOLS 1 ... Sensor part, 2 ... Sensor connection pipe, 6 ... Tuyere pipe, 7 ... Tuyere box, 8 ... Blocking steel ball, 9 ... Blower pipe,
10 ... Communication part, 11 ... Pipe, 12 ... Stopper, 14 ... Pipe, 15 ... Tip pipe.

Claims (2)

[Scope of utility model registration request] 1. An auxiliary tool to be attached to a sensor inserted from a tuyere during blowing of a horizontal cylindrical converter, the inner diameter of which is substantially equal to the outer diameter of the sensor connecting pipe, and the outer diameter is the inner diameter of the tuyere. A pipe substantially equal to, and when the pipe is inserted into the tuyere together with the sensor, the pipe pushes up the tuyere-blocking steel ball upward, and the wing is of a length that does not block the communication part of the blower pipe to the tuyere. A sensor auxiliary tool for a horizontal cylindrical converter equipped with a stopper provided on the outer circumference of the pipe so as to enter the mouth. 2. An auxiliary tool to be attached to a sensor inserted from a tuyere during blowing of a horizontal cylindrical converter, the inner diameter being larger than the outer diameter of the sensor connecting pipe, and the outer diameter being the inner diameter of the tuyere. A pipe having substantially the same diameter, a tip pipe having an inner diameter connected to the tip of the pipe substantially equal to the outer diameter of the sensor connecting pipe and having an outer diameter smaller than the inner diameter of the tuyere, and the pipe and the tip pipe together with the sensor tuyere And a stopper provided on the outer periphery of the pipe so that the pipe pushes the tuyere-blocking steel ball upward when inserted into the tuyere and enters the tuyere by a length that does not block the communication part of the blower pipe to the tuyere. Auxiliary tool for sensor of horizontal cylindrical converter equipped with.