JPS60110819A - Device for monitoring body of continuous copper making furnace - Google Patents

Abstract

PURPOSE:To operate three furnaces so as to have the same life and to improve the working efficiency of a process for production by attaching many thermometers and displacement sensors to a smelting furnace, slag cleaning furnace and blister copper producing furnace in the process for producing blister copper from concentrate of copper, discovering the abnormality in each furnace from the detected values thereof and making quickly safety measure. CONSTITUTION:Copper concentrate, flux, fuel and air are injected from a lance 4 in a smelting furnace 1 and are melted by which the matte and slag of copper are produced. The slag A emitted from a blister copper producing furnaced 3 is returned to the furnace 1 and the copper-content contained therein is recoverd. The copper matte and slag formed in the furnace 1 is fed into a slag cleaning furnace 2 where the matte and slag are heated by the electricity supplied from an electrode 5 and are separated by a difference in specific gravity. Only the matte is put into the furnace 3 into which the air and flux through a lance 6 are fed to oxidize the Fe and S in the matte and the crude copper is produced. Many thermometers and displacement meters are attached to these three furnaces 1-3 and are controlled in a measuring chamber. When an abnormal value is emitted, a safety measure is provided to said part so that the three furnaces have the same service life. The working efficiency in the process for producing the flister copper by the above-mentioned three furnaces is thus improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a monitoring device for a furnace body in a continuous steelmaking furnace.

As shown in Fig. 1, the continuous steelmaking furnace consists of a smelting furnace 1, a smelting furnace 2, and a blister producing furnace 3, and processes copper concentrate through a series of smelting, separation, and smelting steps. It produces continuously all the way up to blister copper. These continuous steelmaking furnaces are attracting attention as low-pollution, energy-saving copper-making furnaces that have simple equipment, low construction costs, can produce exhaust gas at a high temperature of 8,028 degrees Celsius, and have little smoke leakage.

First, an example of a continuous steel making furnace will be briefly explained based on FIG. 1.

In the first smelting process, a melted raw material mainly composed of ore 'EiJ3 and a solvent is mixed with fuel air in a proportion that meets preset reaction conditions, and the mixture is heated in the smelting furnace 1. Continuously charge the reaction product into the solution per unit time, melt it, and heat it up. At that time, the blister produced in the blister producing furnace 3 in the second culm is repeatedly assimilated and pulverized, and it is blown substantially continuously into the melt in the smelting furnace 1 (first step). Most of the copper contained in the copper (indicated by the arrow in Figure 1) is absorbed into the copper. Then, in the second separation step,
The entire amount of the product produced in the smelting process 1 is sent to the smelting furnace 2, where it is heated using an electrode 5 and separated by heat retention and the difference in specific gravity. Furthermore, in the third smelting culm, the slag from the separation process is continuously sent to the blister production furnace 3, where it is charged from the lance 6 with an appropriate mixture of air, solvent, and coolant, and is heated to Through the oxidation reaction of the iron and sulfur components, copper and the above-mentioned Recycle 4 (2) 8 are continuously produced.

By the way, one of the features of a continuous steelmaking furnace is lancing l.
In the melting furnace 1, ore, solvent, fuel! By blowing into the melt, instant melt cuffing, low reaction efficiency, low fuel consumption, downsizing of the furnace, and high SO2'7 can be achieved.
Advantages such as a degree of exhaust gas are highlighted.

In recent years, continuous steelmaking furnaces have been equipped with water-cooled steel, which has greatly improved the durability of the furnace body, and by monitoring the temperature, expansion, etc. of the furnace body material, it is possible to quickly check the status of refractories, jackets, etc. It is now possible to prevent troubles caused by abnormalities, and
For temperature increase after furnace repair and temperature retention during constant boiler inspection, it is important to check whether the contraction and expansion of the furnace body is moving normally and whether there is local heating due to fire. I was also able to understand important points.

Conventionally, such monitoring of the furnace body has been carried out using multi-point temperature records or indicators 81, etc., and these temperature records and indicators are used for each of the melting furnace, smelting furnace, and blister manufacturing furnace. Because the measurement results for multiple locations on the furnace body are simply recorded and displayed, it is difficult to determine the relationship between the conditions of the three furnace bodies from the measurement results. By the way, since a continuous steelmaking furnace performs a series of functions through the cooperation of three furnaces, it is necessary to balance the lives of these three furnace bodies so that those with short lives match those with long lives. is necessary. In this point, the measurement result [, 1 must be 1
) It cannot be said that it is being used effectively-) lJ.

This invention was made in consideration of the circumstances in article L1, and is intended to transmit temperature measurement signals from multiple locations on each of the furnace bodies of a melting furnace, a wrought fireplace, and a blister copper manufacturing furnace to one location. Memorized and the data is different 7+? Ij (I
1), the location of the sensor corresponding to the data is clearly displayed in the diagram of the furnace.This makes it easier to locate the numerous temperature sensors in the three furnace bodies. Selectively and quickly inform the location, 5°? It is always possible to take safety measures quickly and balance the lives of the three reactor bodies by matching the short-lived ones with the long-lived ones. Thus, the present invention provides a monitoring head for furnace bodies in continuous steel making furnaces which is extremely effective in operating them.

Explanation based on cover.

Figure 2 is a system configuration diagram of this device, and Figure 7 is a C-
8 is a C-A thermocouple, and 9 is a displacement sensor. The displacement sensor 9 converts the amount of mechanical displacement into an electrical signal, and in this embodiment, a potentiometer as shown in FIG. 3 is used as the displacement sensor 9. This potentiometer (well, it works on the same principle as a variable resistor, and as the measuring head 10 moves, the point of contact with the resistance wire 11 moves and its resistance changes.a3) As such a position sensor 9, For example, it is also possible to adopt a differential transformer as shown in FIG. 4.This differential transformer includes a cylindrical coil in which a primary coil 12 and a secondary coil 13 are arranged, and and a movable core 14 that magnetically couples the secondary coil 13, and the displacement is estimated from the induced electromotive force of the secondary Koino/13 when the movable core 14 moves together with the ill!I constant. It is something that

A large number of these thermocouples 7, 8 and displacement sensors 9 are attached to appropriate positions on each of the furnace bodies. In this example, the points where the temperature and displacement were measured were determined as shown in the table below.

(Left below) S furnace: melting furnace, SH furnace: wrought iron furnace, C furnace: blister copper manufacturing furnace, CA: C-A thermocouple, cc: cc thermocouple, P
M: Potentiometer.

The measurement points in the above table will be briefly explained below.

In the column of hearth temperature, "on the stamp" refers to the lower surface of the stamp layer 16 below the hearth 15 as shown in FIG.
The blind point under the stamp is the point [ ) 2 on the 1 side of the stamp layer 16 . Taki brick temperature is the hearth 15 and side wall 17.
Humidity of the Daki brick 1E3 located between 13. Lji (
/Kerato temperature is the temperature e of the water-cooled jacket located at the hot water level (basura, in) in the furnace. In the column for Otsuki and Hiromaro, "Jakera 1~bottom" means the bottom surface of the water-cooled jacket located at the Otsuki part of the furnace, and "Jakera" means the top surface of the water-cooled jacket. , the temperature of the water cooling water drained from the side wall of the furnace is the temperature of the cold water of the heat-absorbing water discharged from the water-cooled pipes (1-1) installed on the side wall of the furnace;
The foot cooling water discharge wet quotient is the temperature of the cooling water after heat absorption that is discharged from the water cooling tank provided in the furnace. is a water-cooled pipe installed in a place other than the side wall of the furnace and the earthen floor, such as a gutter that connects the earthen floor between the furnace.
1. Cold 7Jl water temperature polishing after endothermic release. Hearth cooling 1
The inlet temperature in the A column is the temperature at the inlet of the air that cools the hearth, and the outlet temperature is the temperature at the outlet of the air after cooling the hearth. J3 is in the expansion amount column,
Daki brick refers to Daki brick 18 as shown in Figure 5.
and its outer shell iron skin 19; the amount of change of 1!1, that is, the expansion amount of the daki bricks 18;
The amount of change in the distance J2 from P 3, that is, the shell iron skin 19
is the expansion fil. These expansion amounts are measured by applying the displacement sensor 9 to the displacement sensor 9.

In addition, the di[7kerato cold 7JI water supply water temperature] is the temperature of cold water supplied to the water-cooled jacket of 1°2.3 in each house, and in this example, the temperature of the cold water supplied to the water-cooled jacket of 1.2.3 in each house. The temperature of the cooling water is measured at one point.

In this way, in this example, there are a total of 283 measurement points for temperature and displacement resistance.

A large number of thermocouples 7, 8 and displacement sensors 9 at these measurement points are provided as first, iR2, and third sensor groups for each class 1, 2.3. In each of these series groups, a predetermined number of thermocouples 7°8 and displacement sensors 4 and 9 are connected to multiplex brakes 1 and 20, and each of these multiplexers 20 is connected to a common two-wire transmission line 21. J: is connected to the central controller 22 in the R1 chamber R.

The central controller 22 transmits the detection signals of the sensors 1 and 1 not connected to each multiplexer 1 20 to a common 2-wire transmission line 21.
From 1 [1], people are called in a predetermined order. Therefore, the input switch 11 function that switches the sensors connected to the input switch in a predetermined order is disabled by the input switch 20, and the C1 central controller 22 selects each input switch in a predetermined order. Blekri 20'4! - By coming out, the 111' protruding Marjiburek 1] 20 is connected to it -C
The detection signals are sequentially digitized and transmitted to the central controller 22 from a two-wire transmission line 21 in the form of a communication code.

Therefore, in the case of this example, three furnaces 1, 2°3 (
"Ruit?" Temperature and position detection signals from 83 locations are supplied to the central controller 22 in a predetermined order through a common two-wire transmission line 21, and this process is repeated.

In this way, a total of 28
Detection signals from as many as three measurement points are transmitted to the central controller 22 in the control room R.

This is extremely advantageous in terms of wiring for the transmission line 21 and its maintenance, and also facilitates the addition of measurement points.

The central controller 22 controls each multiplex controller 2 as described above.
0 is requested, and the data received (fi L) is sent to the alarm display 23. This alarm display 23 displays alarm judgment for each multiplex cleaner 20.

Further, data received by the central controller 22 is sent from the computer combiner 24 to the computer main body 25. This computer main body 25 has an input capo-h 26 bs
The data inputted by I and others are stored in the data memory 28 by the central control unit 27. At this time, the input data is stored in memory-1 rear allocated to each of the thermocouples 7 and 8 and the displacement sensor 9. The central control unit 27 consists of a CPU and a program memory in which programs used by this CI) are stored. Then, this central system] 1 section 27 analyzes various data input from each sensor 1 of each house 1° 2.3, and sends the results to C[(
1j゛Supplied to display 30, J3 and printer 31. In addition, the computer main body 25 with ε stores its memory data on an external magnetic disk 32 as appropriate.
Alpha. In addition, 33 in Figure 2 is Bat Delhi unit l-
("be.

Next (J, explanation of the specific functions of the medium heat control section 27C
”

First, the middle 94 control unit 27 has a function of displaying a display for measurement HI°I monitoring on the display 30, and a printer: 31.
+ JIt report is displayed on the 1-Sake 8 function. The former display; Ikue displays the measurement vessels of each door 1 and 2.3 on each door 1, 2. 3, r3
This is to display numerical values on the 0 screen. These numerical values are updated at a predetermined time IU (for example, every 6 minutes). When these values reach the warning setting value, they are displayed in red, and when they reach a higher alarm setting value, a buzzer sounds. On the other hand, the latter print function is for automatically hard copying the display screen of the display 30 to the printer 31 periodically as a daily report.

Second, the central control unit 27 causes the riffist to display on the display 30 a graph of past time-dependent changes in the measured values of arbitrary sensors for monitoring the operation A operator (multiple steps are shown in FIG. 6). An example of displaying the change in hearth temperature over time in J3 of blister copper production furnace 3 is shown. In the figure, time is plotted on the horizontal axis and temperature is plotted on the vertical axis. The time axis is the past 38 hours. -C Up to the past 2 hours, data every 6 minutes is taken finely, and before that, data every 1 hour is taken coarsely (
"Then, the time indicated by the 11th unit of time (the time indicated by the time is set short up to the past two hours, and long before that. In this way, in this example, in the middle of the time axis, The 1.1 interval represented by the scale is different in two steps.

It is still possible to graph the data at the required interval. - As an example, FIG. 7 shows a display example of the change over time in the hearth temperature in the gI furnace 1 after the main monitoring system Tl\star i~-up. In this figure, the last 20
Data is taken every 1 [1] between II and every 4 days before that, and the time axis on the right side of the vertical line 1- in the graph is short with 1 scale 1 day, and the time axis on the left side is 1 day. [I @ It is set as long as 4 days.

In a continuous steelmaking furnace, usually each hinge 1)-
The detected temperature changes relatively slowly, while it changes relatively rapidly when an abnormality occurs. Therefore, when monitoring for abnormal changes in the detected temperature, it is necessary to It is better to collect data at small time intervals, and there is no need to monitor particularly detailed temperature changes in the past past a certain point. In this respect, as mentioned above, the time axis of the graph is shortened by 1 hour on the unit scale for the most recent minutes, and detailed data is obtained by shortening the time axis of the graph by 1 hour on the unit scale for the most recent minutes. Obtaining coarse data by improving the hanging time means that it represents continuous temperature changes over a long period of time within the time axis of the limited /j length of the graph.
In addition, in the time domain close to the current time, particularly fine temperature changes are displayed. This provides the advantage that temperature changes in the furnace body can be monitored very appropriately.

The central control unit 27 has the following means to realize the second display function.

That is, the central control section 27 has a time axis setting section and a graph conversion section, and the time axis setting section divides the time axis of the graph to be displayed into predetermined ranges, and converts each divided range into The unit scale table ゎ71' Poem 11■ is set differently. The graph converter converts the stored data in the memory 28 and the stored data in the external magnetic disk 32 into the display 3 based on the time axis thus set.
o to be displayed in a graph.

Note that in the display example of the graph described above, the time represented by the unit scale of the time axis differs in two steps, but it may vary in three or more steps. Further, it is also possible to gradually set the time represented by the unit scale of the time axis to be longer in a stepless manner as one goes back in time. The setting of the 11 kI axis is carried out by the hour 171st-1 setting section as described above.

Next, the third function of the medium heat control section 27 will be explained.

This third function is a function that allows the display 3o to selectively show the installation location of the microwave oven in each house 1.2.3. Fig. 8 shows an example of the measuring point of the v1 water temperature of the J31J water-cooled jet in the Renhime Reactor 2. , The cooling water flow path corresponding to each of the drainage temperature measurement points of the water cooling jacket is selectively displayed (in two colors. In the illustrated state, d3C indicates a large number of water supplies 1)
Corresponding to the shaded area in 13 1; From the 9th place, Renzakura Furnace 2
After passing through the water-cooled di-Vket, which corresponds to the shaded area in the pattern,
A series of cold JJJ water channels are selectively displayed that reach locations corresponding to the shaded areas in the large number of drainage water 11 and IC. The display contents can be selected by the operator when an abnormality is recognized in the cooling water drainage temperature of the first display jacket of the central control unit 27 mentioned above. This is done by specifying with a keyboard or the like.

By the way, the management of the cooling water drainage temperature of the water cooling jacket is as follows.
In addition to detecting melting damage of the water cooling jacket or surrounding bricks at an early stage, it is extremely useful for knowing whether an appropriate amount of cold 7.11 water is being secured. In the event that an abnormality occurs, the ability for the operator to immediately know the location of the water heater, water supply and drainage pipes, and valves is extremely advantageous in taking prompt safety measures.

The central control unit 27 is equipped with the following means to realize the third display function.

That is, the central control unit 27 has a selection unit and a display control unit, and the selection unit selects the diagram corresponding to the location of the range to be displayed based on instructions from the keyboard or the like described above. Monodeasu - Real mo ÷ button IN
Cloth [1-t 991 Cloth! l-7 immersion door pattern
The figure corresponding to the arrangement location of pine tree 4u~, 4ru~ is searched for and displayed on the display 30 for identification. The sensor selected by the selection section is the central control section 2 mentioned above.
An abnormality was recognized from the content displayed on the display 30 by the first display function No. 7. Therefore, it can be said that the first display function of the central control unit 27 in 1.B functions as a detection means for detecting an abnormality in the detection signal of the sensor.

Furthermore, although the illustrated example mentioned above is about Rensakura Furnace 2,
1 for smelting furnace I, J5 J, and blister production furnace 3
111 can be done as shown in the figure. In addition to displaying the wastewater temperature of water-cooled water coolers 1 to 1, we also display diagrams related to other measurement points corresponding to the sensors at those measurement points. Is it selectively displayed? In addition, the selection section in the medium heat control section 27 receives a signal from the detection means that detects an abnormality in the detection signal of the sensor.
It is also possible to provide a selection section that automatically selects the sensor in which the abnormality has been detected.

Next, the fourth function of the central control section 27 will be explained.

This fourth function calculates the amount of heat absorbed from the water level of the cooling water to the water cooling jacket and the continuously measured waste water m1JI of each water cooling jacket, and calculates the amount of heat absorbed for each part of the furnace body 1° 2.3. 1
This function displays the amount of heat lost on the display 30 and prints it out on the printer 31. FIG. 9 shows a display example of endothermic change of the water cooling jacket in the smelting furnace 1. The curve in this display example represents the change in the amount of heat absorbed by the side wall jacket.
Curve E is the change in heat absorption of the ceiling jacket, curve F is the change in the total heat absorption of the side wall jacket and ceiling jacket, and curve G is the change in the heat absorption of the side wall jacket and the ceiling jacket. The changes in the amount of heat absorbed by all the jackets in Furnace 1 are shown.

By the way, the change in the dissipated heat m of the furnace body well reflects the state of wear and tear of the bricks. Therefore, by continuously measuring the amount of heat dissipated in the furnace body, it is possible to know the condition of the bricks in the furnace.

Next, the fifth function of the central control section 27 will be explained.

This fifth function analyzes various expansion constants of the bricks 18 and the shell shell 19 that are continuously detected by the displacement sensor 9, and detects, for example, changes in the residual thickness of the expansion absorbing material in the outer part of the furnace body, and Determine the stress change of 7 Jl + 4 on the shell from the graph of 1 and the compression characteristic curve of the expansion absorbing material, and then display these results on the screen of C Disbres 30 using graphs etc. Print 1-out to printer 31 1;l! There is an O fact C.

As mentioned above, the central control unit 27 in this example has the first to fifth lXl! have the ability.

In addition to t, it is also possible for the central control unit 27 to have the following functions.

(1) Determine the (11 division timing) of the heat exchanger from the cooling water supply and drainage temperature of the water-cooled jacket.

■Inspect the state of wear and tear on the bricks directly under the lance from the hearth hot stone, and decide on changes in the lance arrangement and when to do so.

Cold 7J in the cooling water heat exchanger of the O water-cooled Jitcot
If the seawater for I stops due to some kind of trouble,
The remaining condition of the bricks in the furnace is determined from the temperature of the water-cooled heater, the temperature of each cooling brick, the amount of heat dissipated, etc., and the materials used to determine the next furnace repair period are created.

■Estimate the time to replace the expansion absorber from the expansion measurement results.

■In addition, various computers for furnace operation analysis will be collected.

In addition, we will further develop this monitoring device to provide direct feedback of measurement data to the steelmaking process.
A system that provides operational management information to on-site operators in a concrete form through one control.
It is also possible to

As explained above, the furnace body monitoring device according to the present invention transmits temperature measurement signals from multiple locations of each of the furnace bodies of a melting furnace, a smelting furnace, and a blister manufacturing furnace to one location. When the data shows an abnormal value, the location of the sensor corresponding to that data is displayed in an easy-to-understand manner on the diagram of the furnace. ! 4F*rlIXJcol#J-y-, ヰf
ig co1 -eDO1;--r: 2 tables'l1a4n/+
+11-M" can be notified quickly and safety measures can be taken quickly in the event of an abnormality, and among the three reactor bodies, the one with a long life can be combined with the one with a long life. - It is effective to operate them in a way that balances their lives.

[Brief explanation of the drawing]

Figure 1 is a schematic explanatory diagram of continuous copper manufacturing, Figure 2 to Ta19
The figure is one piece of this invention! FIG. 2 is a schematic diagram of the 4111 configuration of this monitoring device, and FIGS. 3-3 and 4 are principle diagrams for explaining different examples of displacement sensors, respectively.
Fig. 2 is a cross-sectional view of a part of the furnace to explain the arrangement of the unri; It is a figure for explaining. 1... smelting furnace, 2... refining furnace, 3...
...Blutinated copper manufacturing furnace, 7...C-C thermocouple, 8
...C-, A thermocouple, 20...Multiple brake, 21...2-wire transmission line, 22...
... central controller, 25 ... computer main body,
26... Input board, 27... Central control unit, 28... Memory, 29... Port, 30... Display. Applicant Yobishi Metal Co., Ltd. Fig. 6 ω300030ω (Minυ - Fig. 7 (0C) → Tt me (Doy) Fig. 8 Fig. 9 (Mcol/h) 00C Ttme (DQy)

Claims (1)

[Scope of Claims] A continuous steel manufacturing furnace C15 is constructed in which a melting furnace, a II fireplace, and a blister manufacturing furnace are connected, and first, second, and third tubes are installed at appropriate positions in each of the three furnace bodies. A humidity sensor group, a sensor unit that sequentially switches and supplies the detection signals "cJ" of the individual sensors of each temperature sensor group to the 2-wire transmission line, and each detection signal of each temperature sensor supplied from the 2-wire transmission line. a storage section for storing the temperature sensor in the memory 1-rear assigned to each of the four sensor groups; A display section capable of displaying a diagram of each furnace along with six locations where each temperature sensor is located in the diagram, and a display control section that selectively identifies and displays the location of each temperature sensor on this display section, etc. 1. A monitoring device for overheating in a continuous copper-making furnace, characterized in that a temperature sensor 9- detected by a detection means is displayed on the display section.