JPH10121159A - Method for controlling charging quantity of concentrate in non-ferrous metal smelting furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for stably and highly accurately controlling the charging quantity of concentrate into a non-ferrous metal smelting furnace. SOLUTION: In this method for controlling the charging quantity of the concentrate, the concentrate is charged into the non-ferrous metal smelting furnace through a concentrate charging conveyor arranged below a concentrate bin. In this case, (1) the time is divided into two, i.e., the one when the reception of the concentrate into the concentrate bin is not executed, and the other when the reception is executed. (2) During the time when the reception is not executed, the timing for sampling the wt. data of the concentrate bin and the rotating speed data of the concentrate charging conveyor, are sampled. (3) In the sampling timing, the concentrate bin wt. and the concentrate charging conveyor rotating speed, are measured. (4) The concentrate bin decreasing wt. and the concentrate charging conveyor rotating quantity in the sampling time interval, are calculated. (5) The concentrate charging speed sampling value in the sum of plural sampling time intervals is calculated. (6) The concentrate charging conveyor rotating speed setting value when the concentrate charging speed sampling value becomes the concentrate charging speed setting value, is calculated. Further, (7) the concentrate charging conveyor rotating speed is changed to the concentrate charging conveyor rotating speed setting value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the amount of concentrate supplied to a smelting furnace in nonferrous metal smelting.

[0002]

2. Description of the Related Art In non-ferrous metal smelting, controlling the amount of ore charged into a smelting furnace with high precision is an improvement in operation accuracy, such as the accuracy of maintaining the Kawa grade produced in the smelting furnace at a predetermined value. It is important to plan.

FIG. 5 is a schematic diagram showing a conventional method for controlling the amount of concentrate charged to a smelting furnace in nonferrous metal smelting. In FIG. 5, the concentrate which is flash-dried from the drier 51 and continuously fed is formed in the dust chamber 52 and the cyclone 5.
After passing through No. 3, it is stored in the concentrate bin 54. The stored concentrate is cut out by a concentrate charging conveyor 55 provided below the concentrate bin 54 and charged into a nonferrous metal smelting furnace, for example, a flash smelting furnace 56. The concentrate loading conveyor 55 is driven by a variable speed motor 57.

In order to control the amount of concentrate charged when the concentrate is charged into the flash furnace 56, an impact flow meter 58 is provided between the outlet of the concentrate charging conveyor 55 and the flash furnace 56 to control the concentrate. Measure the instantaneous value of the charge. The instantaneous value of the concentrate charging amount measured by the impact flow meter 58 is input to the variable speed motor speed adjusting device 59, and the variable speed motor speed adjusting device 59 controls the variable speed motor speed adjusting device 59 so as to eliminate the deviation from the concentrate charging amount set value. The number of rotations of the concentrate loading conveyor 55 is adjusted.

However, the accuracy of the impact flow meter 58 is as poor as about 10%. Even if an attempt is made to perform feedback control in order to increase the accuracy of the impact flow meter 58, the feedback control is not stable because the measured value is not stable, and the controllability of the concentrate charge may be deteriorated. Could not do. Therefore, the concentrate loading amount was controlled only by adjusting the rotation speed of the concentrate loading conveyor 55.

[0006]

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a method for accurately and stably controlling the amount of concentrate charged in a nonferrous metal smelting furnace. is there.

[0007]

SUMMARY OF THE INVENTION A method of controlling the amount of concentrate in a non-ferrous metal smelting furnace according to the present invention achieves the above-mentioned object, and the method comprises the steps of: A method for controlling the amount of concentrate charged into a metal smelting furnace, comprising: (1) creating a time during which the concentrate is not received into the concentrate bin and a time during which the concentrate is received; Sampling the time of sampling the weight data of the concentrate bin and the rotation speed data of the concentrate charging conveyor at a time during which the reception is not performed; (3) the concentrate bin weight and the concentrate at the sampling time; Measuring the charging conveyor rotation speed; (4) calculating the reduction amount of the concentrate bin weight and the rotation amount of the concentrate charging conveyor in the sampling time interval; and (5) the concentrate loading in the sum of the plurality of sampling time intervals. Speed Calculating the sampling values, (6)
Calculating the concentrate charging conveyor rotation speed such that the concentrate charging speed sampling value becomes the concentrate charging speed setting; and (7) calculating the concentrate charging conveyor rotational speed to the concentrate charging speed. It is characterized in that it is changed to a conveyor rotation speed setting value.

In the present invention, the concentrate is charged at a time when the concentrate is not received in the concentrate bin, and then at a time when the concentrate is received. And repeat this. A sampling time for measuring the weight of the concentrate bin and the rotation speed of the concentrate charging conveyor at a time when the concentrate is not received in the concentrate bin, and the time at which the concentrate is received in the concentrate bin. Does not sample the sampling time.

In addition, the calculation of the ore charging speed setting value such that the ore charging speed sampling value becomes the ore charging speed setting value is based on (1) a recurrence formula of sampling time, (2) The difference between the ore charging speed set value and the ore charging speed sampling value can be calculated by PI control.

[0010] According to the present invention, it is possible to control the concentrate charging amount in the nonferrous metal smelting furnace with high accuracy and stably.

In the present invention, if there are three or more sampling times in one time slot in which concentrate is not accepted into the concentrate bin, the time interval between a certain sampling time and the next sampling time is determined. A plurality of sampling time intervals (hereinafter, referred to as sampling time intervals) can be provided. If two sampling times are provided in one time slot in which concentrate is not accepted into the concentrate bin, one sampling time interval can be provided.
When a plurality of sampling time intervals are formed in one time slot in which concentrate is not received in the concentrate bin, these sampling time intervals form one continuous metering time to control the concentrate charge. Can be performed with higher precision, which is preferable.

The rotation speed of the ore charging conveyor can be changed at any time in order to obtain the desired accuracy and stability of the ore charging control, but it should be performed at each sampling time. It is preferable that the concentration of the concentrate can be controlled more stably.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION In the method for controlling the concentration of concentrate in a nonferrous metal smelting furnace according to the present invention, (1) the weight and concentration of concentrate in the concentrate bin are not received. Sampling the sampling time for measuring the rotation speed of the ore charging conveyor, (2) calculating the ore charging speed sampling value in the sum of a plurality of sampling time intervals,
(3) Calculating the concentrate charging conveyor rotation speed such that the concentrate charging speed sampling value becomes the concentrate charging speed setting, and (4) calculating the concentrate charging conveyor rotation speed. Change to the charging conveyor rotation speed setting value.

In the above (1), the sampling time is sampled at a time when the concentrate is not accepted into the concentrate bin because the concentrate bin weight reduction, which is the basis for calculating the concentrate charging speed sampling value, is performed. This is for accurately calculating the amount. By providing the concentrate transfer bin and the concentrate transfer bin cutting device on the concentrate transfer path to the concentrate bin, time during which the concentrate is not accepted into the concentrate bin can be created. According to the above (2), the ore charging speed sampling value can be calculated with a sufficiently short measurement cycle and with high accuracy.

On the other hand, when a load cell for measuring the weight of the concentrate bin and the concentrate charging conveyor is provided, and the rotation speed of the concentrate charging conveyor is controlled by one measured sampling value of the load cell, the following reason is obtained. However, the measurement control cycle of the load cell cannot be set shorter than several tens of minutes while the measurement accuracy of the load cell is kept high. That is,
(A) The concentrate processing rate in the nonferrous metal smelting furnace is 100 per hour.
Because of its large capacity, the capacity of the concentrate bin requires several hundred tons to operate stably without unloading. (B) The minimum scale of the load cell that measures the weight of the concentrate bottle having a capacity of several hundred tons. Is several hundred kilograms. (C) The hundreds of kilograms in the above (b) is the limit of the accuracy of the load cell, and the measurement control cycle depends on the resolution of the weight data coming from the limit of the accuracy of the load cell. Desired measurement accuracy of 1
%, Several hundred kilograms / 1% = until a reduction of several tens of tons occurs, that is, tens of tons / 100 tons / hour ((a) above) = several minutes cannot be set. Next, four specific embodiments of the present invention will be described.

[Method of FIGS. 1 and 2] FIGS. 1 and 2
FIG. 1 is a schematic view showing an embodiment of a method for controlling the amount of concentrate supplied to a nonferrous metal smelting furnace according to the present invention. FIG. 1 shows a process in which concentrate is fed, and FIG. Mainly shows the status of signal processing in. 1 and 2, (1) the concentrate is flash-dried by a drier 51, continuously fed, and stored in a concentrate bin 54 via a dust chamber 52, a cyclone 53 and a concentrate relay bin 1. The concentrate stored in the concentrate bin 54 is cut out by a concentrate loading conveyor 55 provided below the concentrate bin 54 and the flash furnace 5
6 is charged. The concentrate loading conveyor 55 is driven by a variable speed motor 57.

(2) The weights of the concentrate bin 54 and the concentrate loading conveyor 55 are measured by the load cell 2. The signal of the load cell 2 is input to the load cell converter 3 and input to the arithmetic unit 4 as a weight signal.

(3) The variable speed motor 57 has a speed detector 5
The speed signal is input to the variable speed motor speed controller 6. The variable speed motor speed control device 6, the variable speed motor 57, and the speed detector 5 form a feedback control loop, and the speed command r _{set · n} is input from the arithmetic unit 4 to the variable speed motor speed control device 6. Accordingly, the rotation speed of the concentrate loading conveyor 55 can be freely changed.
The speed signal of the speed detector 5 is also input to the arithmetic unit 4.

(4) A full sensor 7 and an empty sensor 8 are attached to the concentrate relay bin 1, and the signals of the full sensor 7 and the empty sensor 8 are sent to the automatic concentrate controller 9 of the arithmetic unit 4. Enter The concentrate relay bin conveyor automatic operation control unit 9 outputs an operation command to the concentrate relay bin conveyor 10 when the concentrate relay bin 1 is full, and when the concentrate relay bin 1 becomes empty, the concentrate relay bin conveyor. An operation stop command is output to 10.

(5) The operation signal of the concentrate relay bin conveyor 10 is input to the data sampling commander 11, and when the concentrate relay bin conveyor 10 is not operating, the sampling time sampler 12 and the concentrate bin weight are output. Sampler 13 and conveyor rotation speed sampler 14 for concentrate loading
And periodically outputs a sampling command.

(6) Sampling Time The sampling time t _i (i: a positive integer (1,..., N,...), T _i <t _{i + 1} ) sampled by the sampler 12 is stored in the sampling time memory 15. You. The sampling time interval Δt _i is calculated by the sampling time interval calculation 16 (calculation formula Δt _i = t _{i + 1} −t _i ), and is stored in the sampling time interval memory 17. Sampling time interval Δt when the concentrate relay bin conveyor 10 is operating
_i is not calculated. The signal of Δt _i is also inputted to the later-described conveyer loading amount calculation 25 for the concentrate loading. The sampling time interval is not calculated and stored in the sampling time interval memory 17 when the concentrate bin 54 receives concentrate.

(7) A plurality of △ from △ t _m to △ t _n
the sum T _n of t _i is calculated by the sampling time interval summation 18 (arithmetic expression _{T n = m Σ n △ t} i, where _m sigma
_n means the sum of the values of the expression on the right when the variable (here, i) is from m (<n) to n. The same applies to the following).

[0023] (8) concentrate bottle weight sampler 13 is sampled at t _i (including sampling at t _i ~t _i + _1. Also hereinafter the same) concentrate bin weight sampling value w _i is the concentrate bottle weight Stored in the memory 19. Concentrate bottle weight loss in t _i by concentrate bottle weight reduction amount calculating 20 △ w _i is calculated (arithmetic expression △ w _i =
w _i -w _{i +} 1), it is stored in the concentrate bottle weight reduction memory 21. Corresponding to the sampling time interval is not calculated as described above (6) △ w _i is not calculated.

(9) A plurality of △ from △ w _m to △ w _n
sum W _n of w _i is calculated by the concentrate bottle weight loss summation 22 (arithmetic expression _{W n = m Σ n △ w} i). Calculated W
_n is the sum of a plurality of sampling time intervals. Therefore, since the W _n by a plurality is greater than W _n ie △ w _n only one concentrate bottle weight loss measurement accuracy (measurement error / concentrate bottle weight loss) increases. When a plurality of sampling time intervals are formed in one time zone in which concentrate is not received in the concentrate bin and one continuous measuring time is formed, a plurality of △ corresponding to the plurality of sampling time intervals are formed. w _i can be one time period during which no concentrate is received in the concentrate bin. Then, the calculated W _n is preferable because the measurement error is smaller and the measurement accuracy (measurement error / weight reduction amount in the concentrate bin) is further increased. The reason is as follows. That is, the amount of weight reduction in the concentrate bin in one continuous weighing time is the difference between the weight of the first concentrate bin and the weight of the final concentrate bin in the continuous one weighing time. measurement error of the sum of the concentrate bin weight loss in, because thus the measurement error of W _n becomes smaller.

(10) The ore charging rate sampling value F at t _n by the ore charging rate sampling value calculation 23
_{1 · n} is calculated (arithmetic equation F _{1 · n} = W _n / T
_n (I)).

(11) Concentrate Loading Conveyor Rotation Speed The sample concentration charging conveyor rotation speed sampling value r _i sampled at t _i by the sampler 14 is stored in the concentrate charging conveyor rotation speed memory 24. Concentrate loading conveyor rotation amount by the concentrate loading conveyor rotation amount calculation 25 △
v _i is calculated (arithmetic expression _{△ v i = r i · △} t i), it is stored in the concentrate loading conveyor rotation amount memory 26. Corresponding to the sampling time interval is not calculated as described above (6) △ v _i is not calculated.

[0027] (12) △ v sum V _n of a plurality of △ v _i from _m to △ v _n is, concentrate loading conveyor rotation amount summation 2
Is calculated by 7 (arithmetic expression _{V n = m Σ n △ v} i).

(13) The ore loading speed at t _{n by} the ore loading speed setting calculation 28 so that the ore loading speed becomes the _set value F _set (constant). Calculate the value r _{set · n} (arithmetic expression r _{set · n} = r
_{set · n-1} + (F _set −F _{1 · n} ) · V _n / W _n (III))
Output to the variable speed motor speed controller 6. With this output, the ore charging conveyor rotation speed can be changed to the ore charging conveyor rotation speed set value r _{set · n} at t _n . The above equation (III) is a recurrence equation of the sampling time. The value of r _{set · n-1} when this recurrence formula is used for the first time may be the rotational speed of the conveyer for charging the ore for the first use.

(14) As in (13) above, t _{n + 1} , t
_The rotational speed set values of the concentrate loading conveyor at _{n + 2} ,... (r _{set · n + 1} , r _{set · n + 2} ,...) are calculated and output to the variable speed motor speed controller 6. With this output, t
_{At n + 1} , t _{n + 2} ,..., the rotational speed of the concentrate loading conveyor can be changed to r _{set · n + 1} , r _{set · n + 2,.} Since the performs control operation for each t _i in conjunction with the above (6), suitable △ t _i is present to control the extent necessary to SeikoSo Iriryou. If Δt _i is too short, the concentrate loading can be controlled with high accuracy and stability, but not only does the control calculation waste much, but the concentrate loading is also maintained with high precision. Therefore, it is necessary to increase the number of Δt _i for obtaining T _n as compared with the case where Δt _i is appropriate. on the other hand,
If Δt _i is too long, it will be difficult to stably control the concentrate charge with high accuracy.

(15) The calculating device 4 is provided with an instantaneous ore charging speed calculation 29 for t _j (j: any positive integer, t
_j <t _{j + 1} ) to calculate the instantaneous value F _{2 · j} of the concentrate charging speed (calculation formula F _{2 · j} = W _j · r _j / V _j ), and use this F _{2 · j} for continuous display. If you like to use, when you want to change the F _set itself (t _j) at any time convenient it can be changed manually by the F _{2 · j} to reference.

[Method of FIGS. 1 and 3] FIG. 3 is a schematic diagram showing another embodiment of the method for controlling the amount of concentrate charged into a nonferrous metal smelting furnace according to the present invention. Mainly shows the status of signal processing. 1 and 3, (1) The method described in the above [Method of FIGS. 1 and 2]
(1) to (12) except for (7) and (10) are the same in this [Method of FIGS. 1 and 3] ((7) described in the above [Method of FIGS. 1 and 2]). T _n is not calculated) in.

[0032] (2) concentrate dumping speed instantaneous value F _{2 · n} at t _n is calculated by the concentrate dumping speed instantaneous value calculation 29 (arithmetic expression _{F 2 · n = W n ·} r n / V n (II)).

(3) The ore charging speed setting value r by the ore charging speed setting calculation 30 so that the ore charging speed becomes the ore charging speed set value F _set (constant).
Calculate _{set · n} (arithmetic expression r _{set · n} = p · (e _n + (1 /
_{T k) l Σ n e k} · △ t k) (V), where, p: _{parameter, e n = F set -F 2} · n, T k = l Σ n △ t k,
k: a positive integer (1 to n)), which is output to the variable speed motor speed controller 6. With this output, the ore charging conveyor rotation speed can be changed to the ore charging conveyor rotation speed set value r _{set · n} at t _n . Note that software for performing the calculation of the calculation formula (V) is commercially available.

(4) The same calculation as the above (3) is performed at each sampling time t _{n + 1} , t _{n + 2} ,. By doing so, PI control calculation of r _{set · n} can be performed. [Method similar to the method of FIGS. 1 and 2] As a method similar to the method of FIGS. 1 and _2, F _{2 · n} described in (2) of [Method of FIGS. 1 and 3] is used. , Arithmetic expression (II
I) There is a method to use in place of F1 _{· n} . In this case, the ore setting speed r of the concentrate loading conveyor at t _n
The operation formula of _{set · n} is a recurrence formula r _{set · n} of the sampling time.
= R _{set ・ n-1} + (F _set -F _{2 ・ n} ) ・ V _n / W _n (IV)
It is.

[Method similar to the method of FIGS. 1 and 3]
As [method similar to the method of FIGS. 1 and 3], the F described in (10) of the above [method of FIGS. 1 and 2] is used.
There is a method of using _{1 · n} instead of F _{2 · n in} the arithmetic expression (V).

[0036]

【Example】

Example 1 A charge control test of powdery copper concentrate to be charged into a copper smelting self-melting furnace was performed according to [Methods of FIGS. 1 and 2]. The conditions in this test are as follows. That is, (1) Concentrate charging speed of the concentrate charging conveyor F _set : 6 per hour
0 tons (2) Load cell installed in concentrate bin: weighing 200 tons, minimum scale 200 kg, weighing accuracy 1/1000 (3) One continuous weighing time: 1200 seconds (4) From concentrate relay bin to concentrate bin (5) Concentrate relay bin conveyor capacity: 400 tons per hour (6) Calculation cycle Δt _i : 5 minutes (7) Number of data for obtaining total sum: 10

FIG. 4 is a diagram for explaining a method of calculating the sampling rate of the concentrate loading speed. In FIG. 4, the meaning of each symbol is as follows.

△ t ₁ = △ t ₂ =... △ t ₄ = △ t ₆ = △
t ₇ =… = △ t ₉ = △ t ₁₁ = △ t ₁₂ = ... = △ t ₁₄ = 5 minutes (△ t ₁ , △ t ₂ , △ t ₃ and △ t ₄ and △ t ₆ , △
t ₇ , Δt ₈ and Δt ₉ and Δt ₁₁ , Δt ₁₂ and Δt ₁₃
And Δt ₁₄ each form one continuous metering time). Δw ₁ = w ₁ −w ₂ , Δw ₂ = w ₂ −w ₃ ,..., Δw ₄
= W ₄ -w ₅ , △ w ₆ = w ₆ -w ₇ , ..., △ w ₉ = w ₉
−w ₁₀ , △ w ₁₁ = w ₁₁ −w ₁₂ ,..., △ w ₁₄ = w ₁₄ −w ₁₅
(△ w ₅ and △ w ₁₀ are not calculated). W ₁₂ = (△ w ₁ + △ w ₂ + ... + △ w ₄ ) + (△ w ₆ + ...
+ △ w ₉ ) + (△ w ₁₁ + △ w ₁₂ ) = (w ₁ −w ₅ ) +
(W ₆ −w ₁₀ ) + (w ₁₁ −w ₁₃ ). T ₁₂ = (△ t ₁ + △ t ₂ + ... + △ t ₄ ) + (△ t ₆ + ...
+ △ t ₉ ) + (△ t ₁₁ + △ t ₁₂ ) = (t ₅ −t ₁ ) +
_{(T 10 -t 6) + (} t 13 -t 11). W ₁₃ = (△ w ₂ + ... + △ w ₄ ) + (△ w ₆ + ... +…
w ₉ ) + (△ w ₁₁ +... + △ w ₁₃ ) = (w ₂ −w ₅ ) +
(W ₆ −w ₁₀ ) + (w ₁₁ −w ₁₄ ). T ₁₃ = (△ t ₂ + ... + △ t ₄ ) + (△ t ₆ + ... + △
t ₉ ) + (Δt ₁₁ +... + Δt ₁₃ ) = (t ₅ −t ₂ ) +
_{(T 10 -t 6) + (} t 14 -t 11). W ₁₄ = (△ w ₃ + △ w ₄ ) + (△ w ₆ + ... + △ w ₉ ) +
(△ w ₁₁ +... + △ w ₁₄ ) = (w ₃ −w ₅ ) + (w ₆ −w
_{10) + (w 11 -w 15} ). T ₁₄ = (△ t ₃ + △ t ₄ ) + (△ t ₆ +... + △ t ₉ ) +
(△ t ₁₁ +... + △ t ₁₄ ) = (t ₅ −t ₃ ) + (t ₁₀ −t
_{6) + (t 15 -t 11} ). _{F 1 · 13 = W 12 /} T 12, F 1 · 14 = W 13 / T 13, F 1 · 15 = W
₁₄ / T _14.

[0039] According to this test, concentrate dumping speed sampling values _{F 1 · 13, F 1 ·} 14, F 1 · 15, ... error of the measurement error of concentrate bottle weight by the load cell measurement errors time , It is a measurement error of the concentrate bin weight by the load cell. W ₁₂ , W ₁₃ and W by load cell
_Assuming that the ₁₄ measurement errors are σ _W12 , σ _W13 , and σ _W14 , σ _W12 is as follows ( _Equation 1; the same applies to σ _W13 and σ _W14 ).

[0040]

(Equation 1)

Here, σ _w1 = σ _w5 = σ _w6 = σ _w10 = σ _w11
= Σ _w13 = 200 kg, so that:

[0042]

(Equation 2)

However, W ₁₂ = (w ₁ −w ₅ ) + (w ₆
−w ₁₀ ) + (w ₁₁ −w ₁₃ ) = 60 t / h × (20 minutes + 2
(0 minute + 10 minutes) = 50t = W ₁₃ = W ₁₄ . Therefore, the ore charging speed sampling values F _{1 · 13} , F _{1 · 14} ,
F _{1 · 15,} ... is the measurement accuracy of, 489kg / 50t = 0.9
This is about 1% at 8%, which is extremely high as compared with about 10%, which is the measurement accuracy of the conventional impact flowmeter described above.

[0044]

As described above, according to the concentrate charging amount control method in the nonferrous metal smelting furnace of the present invention, the concentrate charging speed can be measured with high accuracy and stably. Therefore, it is possible to improve the operation accuracy such as maintaining the Kawa grade produced in the nonferrous metal smelting furnace at a predetermined value.

[Brief description of the drawings]

FIG. 1 is a schematic view showing one embodiment of a method for controlling the amount of concentrate supplied to a nonferrous metal smelting furnace according to the present invention, and mainly shows a process in which concentrate is transported.

FIG. 2 is a schematic diagram similar to FIG. 1 and mainly shows a state of signal processing in an arithmetic unit.

FIG. 3 is a schematic diagram showing another embodiment of the method for controlling the amount of concentrate supplied to the nonferrous metal smelting furnace of the present invention, and mainly shows a state of signal processing in the arithmetic unit.

FIG. 4 is a diagram illustrating a method of calculating a concentrate charging speed sampling value in the first embodiment.

FIG. 5 is a schematic diagram showing a conventional method for controlling the amount of concentrate supplied to a smelting furnace in nonferrous metal smelting.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concentrate relay bin 2 Load cell 3 Load cell converter 4 Arithmetic unit 5 Speed detector 6 Variable speed motor speed controller 7, 8 sensor 9 Concentrate relay bin conveyor automatic operation control unit 10 Concentrate relay bin conveyor 11 Data sampling commander 12 Sampling time sampler 13 Concentrate bin weight sampler 14 Concentrate charging conveyor rotation speed sampler 15 Sampling time memory 16 Sampling time interval calculation 17 Sampling time interval memory 18 Sampling time interval summation 19 Concentrate bin weight memory 20 Concentrate bin weight Reduction amount calculation 21 Concentrate bin weight reduction amount memory 22 Concentrate bin weight reduction amount sum calculation 23 Concentrate charging speed sampling value calculation 24 Concentrate charging conveyor rotation speed memory 25 Concentrate charging conveyor rotation amount calculation 26 Concentrate Loading conveyor A Rotation amount memory 27 Concentration loading conveyor rotation sum calculation 28 Concentration loading conveyor rotation speed setting calculation 29,30 Concentration loading speed instantaneous value calculation 51 Dryer 52 Dust chamber 53 Cyclone 54 Concentration bin 55 Concentration loading Inlet conveyor 56 Self-melting furnace 57 Variable speed motor 58 Impact flow meter 59 Variable speed motor speed controller

Claims (11)

[Claims] 1. A method for controlling the amount of concentrate charged into a non-ferrous metal smelting furnace by a concentrate charging conveyor provided in a concentrate bin. Create a time during which the ore is not received and a time at which the ore is received; (2) set a time at which the weight data of the concentrate bin and the rotation speed data of the concentrate loading conveyor are sampled during the time when the ore is not received. (3) The weight of the concentrate bin and the rotation speed of the concentrate charging conveyor are measured at the sampling time. (4) The decrease amount of the concentrate bin weight and the rotation amount of the concentrate charging conveyor in the sampling time interval are measured. Calculating (5) calculating a concentrate charging speed sampling value in a sum of a plurality of the sampling time intervals;
(6) calculating a concentrate charging conveyor rotation speed such that the concentrate charging speed sampling value becomes a concentrate charging speed setting; and (7) calculating a concentrate charging conveyor rotation speed. A method for controlling the amount of concentrate charged in a non-ferrous metal smelting furnace, wherein the rotational speed is changed to a set value of an ore charging conveyor rotation speed. 2. The concentrate charging in a non-ferrous metal smelting furnace according to claim 1, wherein the plurality of sampling time intervals are plural in one time zone in which concentrate is not received in the concentrate bin. Quantity control method. 3. The method according to claim 1, wherein the rotation speed of the concentrate charging conveyor is changed at each sampling time. 4. The calculation of the concentrate charging speed sampling value,
Following formula (I) _{F 1 · n = W n /} T n (I) ( wherein, F _{1 · n:} concentrate dumping speed sampling value at the sampling time t _n, T _n: sampling time t _n
4. The method for controlling the charge of a concentrate in a non-ferrous metal smelting furnace according to claim 1, wherein the sum of sampling time intervals in (1), (W _n : the sum of weight reductions in concentrate bins during T _n ). 5. A method for calculating a concentrate charging speed sampling value,
Following formula (II) _{F 2 · n = W n ·} r n / V n (II) ( where, F _{2 · n:} concentrate dumping speed sampling value at the sampling time t _n, W _n: between T _n concentrate bottle weight reduction amount sum, T _n: sampling time interval sum at the sampling time t _n, r _n: concentrate dumping conveyor speed at the sampling time t _n, V _n: concentrate loading conveyor rotates between T _n 4. The method according to claim 1, 2 or 3, wherein the method is carried out by summing up the amount of concentrate in the nonferrous metal smelting furnace. 6. The method for calculating a concentrate charging conveyor rotation speed set value such that a concentrate charging speed sampling value becomes a concentrate charging speed setting value is performed by a recurrence formula of a sampling time. 5. The method for controlling a concentrate charge in a nonferrous metal smelting furnace according to 2, 3, or 4. 7. The calculation of the concentrate charging conveyor rotation speed setting value such that the concentrate charging speed sampling value becomes the concentrate charging speed setting value is performed by a recurrence formula of the sampling time. A method for controlling a concentrate charge in a nonferrous metal smelting furnace as described in the above. 8. The ore-concentrating speed setting value and the ore-concentrating speed are set such that the ore-concentrating speed sampling value is equal to the ore-concentrating speed setting value. 2. The method according to claim 1, wherein the difference between the sampling value and the sampling value is calculated by PI control.
6. A method for controlling a concentrate charge in a non-ferrous metal smelting furnace according to any one of claims 1 to 5. 9. The recurrence formula of the sampling time is as follows:
I) Formula r _{set · n} = r _{set · n−1} + (F _set −F _{1 · n} ) · V _n / W _n (III) (where, r _{set · n} : a conveyer charged with concentrate at t _n Rotational speed set value, F _set : Constant for the ore charging speed set value, F _{set
1 · n:} Sampling time t concentrate dumping speed sampling value at _{n (= W n / T n} ), V n: T n between concentrate loading conveyor rotation amount sum of, T _n: sampling time interval at t _n summation, W _n: concentrate bottle weight reduction amount sum between T _n) a concentrate charging amount control method in a non-ferrous metal smelting furnace according to claim 6. 10. The recurrence formula of the sampling time is represented by the following formula (IV): r _{set · n} = r _{set · n−1} + (F _set −F _{2 · n} ) · V _n / W _n (IV) _Where , r _{set · n} : the _set- up speed of the conveyor for charging the ore at t _n , and F _set : the _set- up speed of the ore charging speed, which is a constant). Amount control method. 11. A time period during which the concentrate is not received in the concentrate bin and a time during which the concentrate is not received are produced by providing a concentrate relay bin on a concentrate carrying path to the concentrate bin.
0. The method for controlling a concentrate charge in a nonferrous metal smelting furnace according to any one of the above items.