JP2961204B2 - Rock wool manufacturing equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a rock wool manufacturing apparatus for melting a main raw material such as natural stone or blast furnace slag in a melting furnace and fibrillating the melt.

(Prior Art) Conventionally, rock wool manufacturing apparatuses have melted rock wool raw materials such as natural raw materials such as natural stones or blast furnace slag, and component adjusting materials such as silica sand in an electric melting furnace, and converted the raw materials into a cotton mill (fiberization mechanism). ) To produce inorganic fibers (rock wool).

Specifically, the molten material is caused to flow out of the tapping hole of the melting furnace to a wheel (rotating body) that is rotationally driven by an electric motor, and the melt is scattered by the centrifugal force of the wheel to be fiberized. At this time, fibrosis is sometimes assisted by fluid pressure such as compressed air.

Then, the inorganic fiber is laminated or formed by adding a binder (additive) to the inorganic fiber and molding.

By the way, in the production of rock wool, stabilization of product quality and improvement of yield are important issues.

In order to solve this, it is necessary to keep the supply amount from the melting furnace to the cotton mill as small as possible.

However, the molten material has a high temperature of "1,450 to 1,600 ° C" and is highly corrosive.
It is extremely difficult to measure.

Therefore, conventionally, the total weight of the electric melting furnace including the weight of the molten metal is measured by a load cell, and a detection signal of the load cell is used to calculate an amount of molten metal discharged per unit time. The amount of hot water is controlled based on a comparison with the value of the set hot water amount, and a fixed amount of hot water is performed.

Specifically, JP-B-63-37313, JP-A-62-153138
JP-A-62-153139 and JP-A-63-73089 describe a method in which a load cell is installed under a base of an electric melting furnace, and the weight of the electric melting furnace including the molten metal weight is measured. The amount of change per hit is determined, and the tilt of the electric melting furnace is controlled in accordance with the comparison between the calculated value and the set value, so that the head height from the molten metal surface of the melting furnace to the tap hole is made constant. .

Japanese Patent Application Laid-Open No. 1-167578 discloses that in addition to the above-mentioned tilting of the melting furnace, the tilting amount of the melting furnace is controlled by a bath surface detector so that the height of the head from the outlet of the molten metal is always constant. Have been done.

Japanese Patent Application Laid-Open No. 1-167579 discloses that instead of tilting a melting furnace, a gate member is provided at a tap hole, in which the position of the tap hole is variable by elevating and lowering, so that the tap hole is discharged through the tap hole,
The height of the head from the tap hole is controlled by raising and lowering the gate member accompanying the tapping of the melt so that the tapping amount is kept constant.

Japanese Patent Application Laid-Open No. 2-169990 discloses a method in which an opening and closing gate for changing the opening area of the tap hole is provided at the tap port of the melting furnace, and the gate member is moved up and down with the tapping of the molten material to reduce the opening area of the tap port. Control is performed so that the amount of hot water is constant.

(Problems to be Solved by the Invention) However, in a system that measures the amount of hot water from a melting furnace using a load cell, the resolution is limited by the weight of the melting furnace.

That is, the weight of the melting furnace is considerable. The weight of an electric melting furnace capable of heating and melting about 20 tons of melt can be as high as about 250 tons. When measuring this weight using a load cell,
Even if four load cells are used, each load cell uses a heavy load of "100 to 200 ton class", and the resolution as a measurement system at this time is "2040 kg
Degree ”. However, in the electric melting furnace having the above-mentioned weight, a normal tapping amount is "about 5 tons per hour", that is, a tapping amount of "about 83 kg per minute". In other words, the accuracy of the load cell is insufficient to measure the variation in the amount of hot water from the electric melting furnace.

For this reason, it was not very good in terms of product quality and yield.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a rock wool manufacturing apparatus capable of improving product quality and yield.

(Means for Solving the Problems) In order to achieve the above object, a rock wool manufacturing apparatus according to claim 1 includes a melting furnace for melting rock wool raw material, and a taphole provided on a furnace wall of the melting furnace. A variable mechanism for varying the amount of hot water at the tap, and a rotating body that is rotationally driven by an electric motor. The rotating body receives the melt discharged from the tap at the hot spot and centrifugally melts the melt. A fiberizing mechanism for fiberizing, a tapping amount setting unit in which a predetermined tapping amount is set, a load detecting unit that detects a load of an electric motor of the fiberizing mechanism, and the melting according to a detection signal from the load detecting unit. A tapping amount calculation unit for determining a tapping amount from the furnace, and a tapping amount control unit that controls the variable mechanism such that the tapping amount determined by the tapping calculation unit is the set tapping amount set by the tapping amount setting unit. Has been established.

Similarly, a rock wool manufacturing apparatus according to claim 2 is a melting furnace for melting rock wool raw material, a tap hole provided on a furnace wall of the melting furnace, and a variable mechanism for changing a tapping amount of the tap hole, A fiberization mechanism for fiberizing the melt discharged from the tapping hole, a productization mechanism for producing a predetermined product with fibers obtained by the fiber mechanism, and a product weight setting unit in which a predetermined product weight is set, A product weight measuring unit for measuring the weight of the product produced by the productizing mechanism; and the variable mechanism such that the product weight measured by the product weight measuring unit is the set product weight set by the product weight setting unit. And a hot water discharge amount control unit for controlling the temperature.

The rock wool manufacturing apparatus according to claim 3 further includes a melting furnace for melting the rock wool raw material, a tap hole provided on a furnace wall of the melting furnace, and a variable mechanism that varies a tapping amount of the tap hole. A fiberizing mechanism having a rotating body driven to rotate by an electric motor, receiving a melt discharged from the tapping hole by the rotating body, and fiberizing the melt by centrifugal force; and a fiberizing mechanism. Additive adding means for adding an additive to the fiber to be obtained, a productizing mechanism for commercializing the fiber obtained by the fiberizing mechanism, a tapping amount setting unit in which a predetermined tapping amount is set, and the fiberizing mechanism A load detector that detects the load of the electric motor, a first tapping amount calculator that determines the tapping amount from the melting furnace according to a detection signal from the load detector,
A tapping amount control unit that controls the variable mechanism so that the tapping amount calculated by the tapping amount calculation unit is equal to the set tapping amount set by the tapping amount setting unit; and a weight of a product produced by the commercialization mechanism. A product weight measuring unit for measuring the product weight, the product weight measured by the product weight measuring unit, the yield of the product with respect to the amount of molten metal discharged from the melting furnace, and the second amount of the molten product discharged from the melt based on the amount of the additive used. There is provided a hot water amount calculating unit and a correction circuit for correcting the set hot water amount set by the hot water amount setting unit in accordance with the hot water amount obtained by the second hot water amount calculating unit.

Similarly, a rock wool manufacturing apparatus according to claim 4 is a melting furnace for melting rock wool raw material, a tap hole provided on a furnace wall of the melting furnace, and a variable mechanism for changing a tapping amount of the tap hole, A fiberizing mechanism having a rotating body driven to rotate by an electric motor, receiving a melt discharged from the tapping hole by the rotating body, and fiberizing the melt by centrifugal force; and a fiberizing mechanism. A commercialization mechanism to commercialize the fibers to be produced,
A tapping amount setting unit in which a predetermined tapping amount is set; a load detecting unit that detects a load of an electric motor of the fiberizing mechanism; and a tapping amount that determines a tapping amount from the melting furnace according to a detection signal from the load detecting unit. A tapping amount calculation unit, a tapping amount control unit that controls the variable mechanism such that the tapping amount determined by the tapping amount calculation unit is the set tapping amount set by the tapping amount setting unit, A product weight measuring unit for measuring the weight of the product obtained by the mechanism, a product weight measured by the product weight measuring unit, a yield of the product from the melting furnace by the yield with respect to the hot water amount of the melting furnace; 2 hot water amount calculation unit;
There is provided a correction circuit for correcting the set tapping amount set by the tapping amount setting unit according to the tapping amount obtained by the second tapping amount calculation unit.

(Operation) According to the rock wool manufacturing apparatus of the first aspect, when the molten material flows out of the molten metal outlet to the rotating body of the fiberizing mechanism via the variable mechanism, the molten material is scattered by centrifugal force. Become fiber.

At this time, the load detecting unit detects the load of the electric motor driving the rotating body, and the tapping amount calculating unit obtains the tapping amount of the melting furnace from the load. Then, the hot water amount control unit controls the variable mechanism so that the obtained hot water amount becomes the set hot water amount set by the hot water amount setting unit.

In this quantitative control, a change in the amount of hot water is directly detected from a change in the load of the electric motor of the fiberizing mechanism, so that the amount of hot water can always be controlled with high accuracy regardless of the size and weight of the melting furnace.

Therefore, the product quality and the yield can be remarkably improved as compared with those using a load cell.
In addition, since the amount of molten metal is quickly controlled in response to a change in the amount of molten metal discharged from the melting furnace, there is no time delay from the detection of the change to the determination of the amount.

According to the rock wool manufacturing apparatus of the second aspect, when the melt is discharged from the tap of the melting furnace to the fiberizing mechanism via the variable mechanism, the melt turns into fibers. Then, the fiber is turned into a predetermined product by the productization mechanism.

At this time, the product weight measuring unit measures the weight of the product obtained by the commercialization mechanism. And in the hot water amount control unit,
The variable mechanism is controlled so that the measured product weight becomes the set hot water amount set by the product weight setting unit.

Since the quantitative control detects a change in the amount of hot water from a change in the product weight, the amount of hot water can always be controlled with high accuracy regardless of the size and weight of the melting furnace, as in the case of claim 1. it can.

Therefore, the product quality and yield can be significantly improved.

According to the rock wool manufacturing apparatus of the third aspect, when the melt flows out of the tapping port of the melting furnace to the rotating body of the fiberizing mechanism via the variable mechanism, the melt is scattered by centrifugal force to become fibers. An additive is added to the fiber. Then, the fiber to which the additive is added becomes a product of a predetermined solid matter by a product formation mechanism.

At this time, the load detector detects the load of the electric motor that drives the rotating body, and the first tapping amount calculator calculates the tapping amount of the melting furnace from the load. Then, the hot water amount control unit controls the variable mechanism so that the obtained hot water amount becomes the set hot water amount set by the hot water amount setting unit.

On the other hand, the product weight measuring section measures the weight of the product produced by the quantitative control. In addition, the second hot water discharge amount calculation unit obtains the actual hot water discharge amount of the melt from the measured weight, the yield relative to the hot water discharge amount of the product, and the usage amount of the additive.

Here, for example, if the viscosity of the molten material changes due to long-term operation, the amount of molten metal is the same as the set amount of molten metal (the load detected by the load detection unit remains unchanged), but the amount of change in the viscosity of the molten metal is changed. The amount of hot water may vary.

Therefore, the correction circuit corrects the amount of hot water set by the hot water amount setting unit by the amount of variation.

Therefore, in addition to the effects of claim 1 described above, even for rare case requirements that cannot be met by load detection of the motor,
Quantitative control can be maintained with high accuracy.

According to the rock wool manufacturing apparatus of the fourth aspect, unlike the invention of the third aspect, a product to which no additive is added is produced by the productizing mechanism.

Then, the weight of this product is measured by the product weight measurement unit,
From the measured weight and the yield relative to the product tapping amount, the second tapping amount calculation unit obtains the tapping amount of the melt actually used.

Here, for example, if the viscosity of the molten material changes due to long-term operation, the amount of molten metal is the same as the set amount of molten metal (the load detected by the load detection unit remains unchanged), but the amount of change in the viscosity of the molten metal is changed. , The amount of hot water may vary,
In the correction circuit, the set hot water amount set by the hot water amount setting section is corrected by the variation.

Therefore, high-precision quantitative control is provided, as in the third aspect.

(Embodiment) Hereinafter, the invention described in claim 1 will be described based on one embodiment shown in FIGS. 1 to 3. FIG. 2 shows a rock wool manufacturing apparatus to which the present invention is applied, and 1 is an electric melting furnace. Electrodes 2 and 2 are inserted in the furnace of the electric melting furnace 1. By supplying electricity to these electrodes 2, 2, the electric melting furnace 1
Inside, a rock wool raw material such as a main raw material such as natural stone or blast furnace slag and a component adjusting material such as silica sand added to the raw material as needed are melted. On the furnace wall of the electric melting furnace 1, a tap hole 3 for discharging molten metal is provided. The tap 3 has a slide gate mechanism 6.
(Variable mechanism) is provided. Slide gate mechanism 6
Is composed of a gate 4 provided to cover the tap 3 and an elevating mechanism 5 that raises and lowers the gate 4 and uses an electric motor 5a as a drive source. The opening area of the gate 3 can be changed.
That is, the amount of hot water can be varied from the change in the opening area of the hot water outlet 3.

On the other hand, 7 is a cotton mill (fiberization mechanism) provided below the tap hole 3. As shown in FIGS. 1 and 3, for example, a plurality of, for example, four wheels 9a to 9d (rotating bodies) are rotatably protruded from a side surface of a main body 8 in a staggered two-row arrangement. (FIG. 1 shows only two wheels 9b and 9d). These wheels 9a to 9d are arranged at positions for receiving the molten metal discharged from the electric melting furnace 1.
Each of the wheels 9a to 9d is a speed-up belt mechanism 10 respectively.
It is connected to electric motors 11a to 11c built in the main body 8 via a to 10d, so that the molten metal reaching the wheels 9a to 9d can be scattered by centrifugal force. With this, the molten metal is made into fibers. In addition, the electric motors 11a to 11d
Are connected to a power supply 28 via a motor drive circuit 27. Also, as shown in FIG. 3, a plurality of compressed air outlets 12 are provided in the main body wall around each of the wheels 9a to 9d.
A plurality of binder ejection holes 13 are provided. And
The compressed air outlet 12 is connected to the blower 12a, and the wheel 9a
Compressed air is blown from around 9d to help the fiberization. This may be a pressure fluid such as steam. In addition, the binder jet port 13 is
It is connected to a binder tank 14 installed outside via a pressure feeding device 14a, so that a binder (additive material) necessary for molding for commercialization can be supplied from the inside of the binder tank 14 to the fiber group (addition Substance addition means).

A cotton collecting device 16 (fiberization mechanism) is provided on a side of the cotton mill 7 on the wheel side. The cotton collecting device 16 is a wheel 9a
The mesh conveyor 17 has a triangular mesh and is arranged on the side of the conveyance path which is the slope of the mesh conveyor 17 and the suction device 18 is provided on the rear side of the conveyance path. And
A dust collector 19, a blower 20, and an exhaust tower 21 are connected to the suction device 18 in order, so that fibers can be collected on the mesh conveyor 17 by the suction force given to the suction device 18.

A plurality of conveyors 22a to 22e, a drying path 23, and a conveyor 24 provided with a cooler 24a are sequentially arranged at the conveyor outlet of the mesh conveyor 17. However, 24b is a blower for sending cooling air to the cooler 24a. In these configured lines, the fiber group collected by the mesh conveyor 17 is formed into a belt-shaped molded product by a drying step and a cooling step (product formation mechanism). In addition, a transport conveyor 25 that transports to a packing facility via a cutting machine (not shown) is provided at a transport outlet of the transport conveyor 24.

On the other hand, the cotton mill 7 is provided with a gate control device 30 for quantitatively controlling the amount of hot water from the tap hole 3.
The configuration of the gate control device 30 is shown in FIG.

Describing the gate control device 30, reference numeral 31 denotes a motor current detector (load detection unit). This motor current detector
31 is connected to, for example, the power supply side of the electric motor 11b for driving the second wheel 9b among the electric motors 11a to 11d of the cotton-making device 7, and detects the motor current value (load). . The detection of the motor current of the electric motor 11b is based on the results of experiments that the motor current value of the electric motor 11b has less influence of disturbance on the amount of hot water than the first wheel 9a, and the correlation with the amount of hot water is the third. Alternatively, it has been confirmed that it is better than the motor current value of the fourth electric motors 11c and 11d, so that it is adopted.

Reference numeral 32 denotes a tapping amount calculation circuit (a tapping amount calculation unit). The tapping amount calculation circuit 32 calculates a motor current value detected by the motor current detector 31 to obtain an average value within a predetermined time corresponding to the tapping amount of the electric melting furnace 1.

33 is a tapping amount setting device. This hot water amount setting device 33 has
A motor current value (load value) corresponding to a desired amount of hot water from the electric melting furnace 1 is set. The hot water amount setting device 33 and the hot water amount calculating circuit 32 are connected to a difference detector 34, and the difference is output from the difference detector 34. The difference detector 34 is connected to a drive circuit for the electric motor 5a of the elevating mechanism 5, that is, a slide gate drive circuit 36 via a gate amount control circuit 35 (a hot water discharge amount control unit). As a result, the gate amount control circuit 35 switches the slide drive circuit 36
A drive signal having a gate amount corresponding to the difference signal of the motor current value is output to the gate 4, and the gate 4 is moved up and down until the difference detected by the difference detector 34 becomes zero. That is, the slide gate mechanism 6 is controlled so that the determined hot water supply amount becomes the set hot water output amount.

Next, the operation of the rock wool manufacturing apparatus configured as described above will be described.

Rock wool raw material (main raw material, component adjusting material) is charged into the electric melting furnace 1, and electricity is supplied to the electrodes 2 and 2. Thus, the rock wool raw material is heated to a predetermined temperature and melts.

Thereafter, the molten metal of the electric melting furnace 1 is continuously supplied to the cotton mill 7 from the tap 3 through the gate 4. Here, in the cotton mill 7, each of the wheels 9a to 9d is rotationally driven, compressed air is blown out from a compressed air outlet 12, and a binder (additive) is injected from a binder injection hole 13. As shown in FIG. 3, the molten metal flows from the first wheel 9a to the second wheel 9b, the third wheel 9c, and the fourth wheel 9d in this order. At this time, the molten metal is scattered by the centrifugal force of each of the wheels 9a to 9d and the pressure of the compressed air, and becomes fibers (rock wool to which the additive is added).

On the other hand, the suction device 18 and each conveyor 17, 22a to 22e, 24, 25
Is operating, and the produced fibers are first collected by the mesh conveyor 17 by suction. Next, the fibers containing the binder in a layered state on the mesh conveyor 17 are passed through the conveyors 22a to 22e and dried in a drying oven.
It is sent to 23, where it is dried by heating. After that, the solidified fibers are cooled by the cooler 24a when passing through the conveyor 24a. Thereby, a strip-shaped molded product is manufactured. Then, the molded product is sent to a cutting machine (not shown) by the conveyor 25, cut into a predetermined shape, and then sent to a facility (not shown) for packing the cut product.

Here, during the operation of the line, the motor current detection unit 31
Detects the motor current value (load) of the electric motor 11b that drives the second wheel 9b. Then, the tapping amount calculation circuit 32 calculates an average value of the motor current value per fixed time. Here, since the motor current value and the tapping amount are correlated, finding the average value means finding the tapping amount from the electric melting furnace 1. The obtained value is compared with a motor current value corresponding to a desired hot water amount set in hot water amount setting device 33 by difference detector 34, and a difference is obtained. Next, a drive signal having a gate amount corresponding to this difference is output from the gate amount control circuit 35 to the slide drive circuit 36. Then, the motor 5a of the lifting mechanism 5 raises and lowers the gate 4 so that the difference in the difference detector 34 becomes zero, and changes the opening area of the tap hole 3.

Therefore, the amount of hot water discharged from the electric melting furnace 1 is quantitatively controlled to the value of the set hot water amount.

In addition, since the change in the amount of hot water from the electric melting furnace 1 is directly detected from the load fluctuation of the electric motor 9b, the size of the electric melting furnace 1
Regardless of the weight, the amount of hot water is always controlled with high accuracy.

Therefore, the product quality and the yield can be remarkably improved as compared with those using a load cell.
In addition, since it is controlled to be quantitative in response to a change in the amount of hot water from the electric melting furnace 1 immediately, there is no time delay from the detection of the change to the determination of the amount.

In this embodiment, the motor current value of the motor driving the second wheel is detected because it is suitable. However, in some cases, even if the motor current value of the motor driving the other wheels is detected, 4 The average current value of the motor currents of the two electric motors may be detected. Of course, the load of the motor may be detected by detecting the motor current and the motor voltage instead of the motor current of the motor to obtain the input power of the motor.

FIGS. 4 and 5 show an embodiment of the present invention.

In the present embodiment, the amount of hot water discharged from the electric melting furnace 1 is quantitatively controlled using the product weight instead of the load of the electric motor.

That is, in this embodiment, the conveyor 22e is provided with a weighing device 40 (product weight measuring unit) for continuously measuring the weight of the stacked rock wool (product) conveyed by the conveyor 22e. On the other hand, the gate control device 30 is provided with a product weight detection circuit 41 instead of the motor current detector so as to obtain the product weight per fixed time. Further, a product weight setting device 42 (product weight setting section) is provided in place of the hot water amount setting device.

Here, the product weight setting unit 42 has a product yield input unit 43 for inputting a product yield, an additive addition amount input unit 44 for inputting a usage amount of a binder (additive), and a setting output for inputting a set hot water amount. A hot water input unit 45 is connected. Then, the product weight setting section 42 performs an arithmetic process based on the information of the desired hot water supply amount, product yield and addition amount that are set, and obtains the weight when the product is produced with the desired hot water output amount. That is, a desired product weight serving as a reference is set.

Then, the set product weight and the product weight obtained by the product weight detection circuit 41 are compared with the difference detector as in the above-described embodiment.
The comparison is made at 34, and a drive signal of a gate amount corresponding to this difference is output from the gate amount control circuit 35 to the slide drive circuit 36.

As a result, the motor 5a of the lifting mechanism 5 is connected to the difference detector
The gate 4 is moved up and down so that the difference at 34 becomes zero, and the opening area of the tap hole 3 is changed.

Therefore, the amount of hot water discharged from the electric melting furnace 1 is controlled to a fixed value by the value of the product weight.

In addition, since this quantitative control detects a change in the amount of hot water from a change in the product weight, the amount of hot water can always be controlled with high accuracy regardless of the size and weight of the melting furnace. Can be.

Therefore, the product quality and yield can be significantly improved.

6 and 7 show an embodiment of the third aspect of the present invention.

In this embodiment, in addition to the invention of claim 1, quantitative analysis is performed for rare case requirements that cannot be exhibited by load detection of the electric motor 9b of the cotton mill 7, for example, when the viscosity of the melt changes during long-term operation. The control can be maintained with high accuracy.

That is, in this embodiment, a set value correction circuit 50 for correcting a reference set hot water supply amount is connected to the gate control device 30 according to the first embodiment of the present invention. The hot water amount correcting circuit 33a is built in the heater 33. On the other hand, the set value correction circuit 50 uses the measured value of the weighing device 40 to determine a fixed long time (a time longer than the time required to obtain the average value shown in claim 2).
It has a long-term average weight calculating circuit 51 for calculating a hit average value, and a hot water amount calculating circuit 52 connected to this circuit 51. Further, a product yield input section 43 and an additive addition amount input section 44 are connected to the tapping amount calculation circuit 52. This hot water amount calculation circuit
In 52, the arithmetic processing is performed on the basis of the input product weight (average value), the yield with respect to the product tapping amount, and the amount of binder (additive) used, and the tapping amount of the actually used molten material is calculated. ing. And this tapping amount calculation circuit
52 is connected to the hot water amount setting device 33, and in the built-in hot water amount correcting circuit 33a, the hot water amount set by the hot water amount setting device 33 is compared with the actual hot water amount, and if different, the hot water amount value is replaced. is there.

Explaining the quantitative control in such a configuration, the motor current detector 31 detects the motor current (load) of the electric motor 9b and outputs the tap water amount calculation circuit 32 ( The amount of hot water from the electric melting furnace 1 is determined from the motor current value per fixed time calculated by the first hot water amount calculating section). Then, the slide gate mechanism 6 is controlled by the difference detector 34 and the gate amount control circuit 35 so that the obtained hot water amount becomes the desired hot water amount set by the hot water amount setting device 33.

On the other hand, the weighing device 40 detects the weight of the product produced by the quantitative control. Then, the long-term average weight calculation circuit 51 calculates the average value of the weight per fixed long time to measure the product weight. Subsequently, in the hot water amount calculation circuit 52, the measured weight, the yield relative to the hot water amount of the product input from the product yield input unit 43, and the binder (additive) input from the additive amount input unit 45. From the amount used, the amount of molten metal actually used is determined.

Here, for example, it is assumed that the viscosity of the melt has changed due to long-term operation. In this case, although the tapping amount detected from the motor current value is equal to the set tapping amount, the tapping amount may actually vary depending on the change in the viscosity of the melt.

Therefore, in order to correct such a change in the tapping amount, the tapping amount correction circuit 50 calculates the tapping amount calculated based on the average product weight measured over a long period of time, and the set tapping amount set in the tapping amount setting device 33. Are compared. That is, the amount of hot water is fed back from the product weight to monitor the amount of change in the amount of hot water. And if there is a difference in the value, the hot water amount correction circuit
The hot water volume is replaced by 50. In other words, the set tapping amount is corrected for the variation, and the fixed tapping amount is maintained with high accuracy.

However, even if a rare case effect that cannot be handled by the load detection of the electric motor 9b occurs, high quantitative control is maintained.

In each of the above-described embodiments of the present invention, a rock wool manufacturing apparatus having a drying furnace 23, that is, a lock for manufacturing a solid molded product (product) by adding a binder (additive) to the fiber. The invention was applied to the wool manufacturing apparatus, but the binder (additive) was used as shown in FIG.
May be applied to a rock wool manufacturing apparatus that is transported to a packing facility by the transport conveyor 60 (product conversion mechanism) as a fiber, that is, as blown cotton, without adding any of the above.

Rock wool manufacturing equipment that applies quantitative control that can correct variations in the set hot water output (rock wool that is manufactured as fibers without adding a binder and that is transported to packing equipment) FIG. 9 shows a manufacturing apparatus as an embodiment of the present invention.

This embodiment is different from the embodiment of claim 3 shown in FIG.
In this case, the additive amount input section for inputting the additive amount is deleted. Then, in the tapping amount calculation circuit 52, from the weight measured by the long-term average weight calculation circuit 51 and the yield input from the product yield input unit 43, the tapping amount of the actually used melt is obtained, and this value is used. To correct the set hot water supply.

That is, in the same manner as described above, for example, the variation in the tapping amount caused when the viscosity of the melt changes due to long-term operation is corrected by the tapping amount correction circuit 33a according to the tapping amount value actually used. Therefore, even when the fiber itself is a product (blown cotton), high-precision quantitative control is performed in the same manner as in the third aspect.

In FIGS. 4 to 9, the same components as those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof is omitted.

Also, in the above-described embodiments of the inventions of claims 1 to 4, the variable mechanism for varying the opening area of the tap hole by moving the gate up and down to quantitatively determine the amount of tapping water is adopted. Means, for example, the structure as described in the section of the "prior art", that is, a variable mechanism in which the height of the head from the tap hole of the gate is fixed by the gate in which the position of the tap hole is variable, a melting furnace A tilting mechanism for tilting the tilting mechanism is provided, and a variable mechanism for controlling the tilting of the tilting mechanism to keep the head height from the molten cotton to the tap hole of the melting furnace constant, and in addition to this tilt, from the tap on the surface of the molten metal. A variable mechanism or the like in which the height of the head is made constant by the bath surface detector may be used. The point is that any mechanism can be used as long as the amount of hot water from the hot water outlet can be varied and the amount of hot water can be made constant by this variation.

[Effects of the Invention] As described above, according to the first and second aspects of the present invention, it is possible to control the tapping amount with high accuracy regardless of the size and weight of the melting furnace.

Therefore, the product quality and the yield can be remarkably improved as compared with those using a load cell.

In addition, according to the first aspect of the present invention, since the molten metal is quickly controlled to a fixed amount in response to a change in the amount of molten metal discharged from the melting furnace,
There is no time delay between detecting the change and quantifying it.

According to the third aspect of the invention, in addition to the effect of the first aspect, quantitative control can be maintained with high accuracy even for rare case requirements that cannot be met by load detection of the electric motor.

Further, according to the invention described in claim 4, the same effect as in claim 3 is exerted in a rock wool manufacturing apparatus that converts fibers into a product without using an additive.

[Brief description of the drawings]

FIG. 1 is a diagram showing a constant tapping amount control system of a rock wool producing apparatus according to an embodiment of the present invention, FIG. 2 is a diagram showing a rock wool producing apparatus, and FIG. , Arrow A-
FIG. 4 is a side view of the cotton mill seen from A, FIG. 4 is a view showing a rock wool manufacturing apparatus according to an embodiment of the present invention, and FIG.
The figure shows a constant tapping amount control system of the rock wool manufacturing apparatus,
FIG. 6 is a diagram showing a rock wool producing apparatus according to an embodiment of the invention as set forth in claim 3, FIG. 7 is a diagram showing a constant discharge amount control system of the rock wool producing apparatus, and FIG. FIG. 9 is a view showing a different rock wool manufacturing apparatus, and FIG. 9 is a view showing a constant tapping amount control system of the rock wool manufacturing apparatus according to one embodiment of the present invention. 1 ... electric melting furnace, 3 ... tap hole, 6 ... slide gate mechanism, 7 ... cotton mill, 16 ... cotton collecting machine, 9a-9d ... wheels, 11a-11d ... electric motor, 17 ... ... Mesh conveyor, 18 ... Suction unit, 22a ~ 22e ... Conveyor, 23 ...
… Drying oven, 24a… cooler, 31… motor current detection circuit, 32… hot water amount calculation circuit, 33… hot water amount setting device, 34…
... difference detector, 35 ... gate amount control circuit, 40 ... weigher,
41 …… Product weight detection circuit, 42 …… Product weight setting device, 43…
… Product yield input section, 44… Additive additive amount input section, 45…
Set hot water input part, 51 ... Long term average weight calculation circuit, 52 ...
… A hot water amount calculation circuit

Claims (4)

(57) [Claims] 1. A melting furnace for melting a rock wool raw material, a tap hole provided on a furnace wall of the melting furnace, a variable mechanism for varying a tapping amount of the tap port, and a rotating body rotated by an electric motor A fiberization mechanism that receives the melt discharged from the tapping hole by the rotating body and fiberizes the melt by centrifugal force; a tapping amount setting unit in which a predetermined tapping amount is set; A load detector that detects the load of the electric motor of the fiberizing mechanism; a tapping amount calculator that calculates a tapping amount from the melting furnace according to a detection signal from the load detector; and a tapping amount that is determined by the tapping calculator. A rock wool production device, comprising: a hot water amount control unit that controls the variable mechanism so that the hot water amount is set by the hot water amount setting unit. 2. A melting furnace for melting a rock wool raw material, a tap hole provided on a furnace wall of the melting furnace, a variable mechanism for varying a tapping amount of the tap hole, and a melting tap from the tap port. A fiberization mechanism for fiberizing a product, a productization mechanism for commercializing fibers obtained by the fiberization mechanism, a product weight setting unit in which a predetermined product weight is set, and a product made by the productization mechanism A product weight measurement unit that measures the weight of the product, and a hot water supply amount control unit that controls the variable mechanism so that the product weight measured by the product weight measurement unit is the set product weight set by the product weight setting unit. A rock wool manufacturing apparatus, comprising: 3. A melting furnace for melting a rock wool raw material, a tap hole provided on a furnace wall of the melting furnace, a variable mechanism for varying a tapping amount of the tap hole, and a rotating body driven to rotate by an electric motor. A fiberization mechanism for receiving the melt discharged from the tapping hole by the rotating body and fibrillating the melt by centrifugal force; and adding an additive to the fiber obtained by the fiberization mechanism. Additive adding means, a productizing mechanism for commercializing fibers obtained by the fiberizing mechanism, a tapping amount setting unit in which a predetermined tapping amount is set, and a load for detecting a load of an electric motor of the fiberizing mechanism. A detector, a first tapping amount calculator for determining a tapping amount from the melting furnace in accordance with a detection signal from the load detector, and a tapping amount determined by the tapping amount calculator is set by the tapping amount setting unit. The variable mechanism is adjusted so that the set hot water amount is set. A hot water amount control unit to be controlled, a product weight measuring unit for measuring the weight of the product produced by the productizing mechanism, a product weight measured by the product weight measuring unit, and a yield of the product with respect to a hot water amount of the melting furnace. A second tapping amount calculation unit for determining the tapping amount of the melt based on the amount of use of the additive; and a tapping amount determined by the second tapping amount calculation unit by setting the tapping amount set by the tapping amount setting unit. And a correction circuit for correcting the wool according to the following. 4. A melting furnace for melting rock wool raw material, a tap hole provided on a furnace wall of the melting furnace, a variable mechanism for varying a tapping amount of the tap hole, and a rotating body driven to rotate by an electric motor. A fiberizing mechanism for receiving the melt discharged from the tap hole by the rotating body and fibrillating the melt by centrifugal force; and commercializing the fiber obtained by the fiberizing mechanism. A mechanism, a tapping amount setting unit in which a predetermined tapping amount is set, a load detecting unit that detects a load of an electric motor of the fiberizing mechanism, and a tapping amount from the melting furnace according to a detection signal from the load detecting unit. A first tapping amount calculation unit that calculates the tapping amount; a tapping amount control unit that controls the variable mechanism such that the tapping amount determined by the tapping amount calculation unit is the set tapping amount set by the tapping amount setting unit; Measure the weight of the product obtained by the productization mechanism A product weight measuring unit, a product weight measured by the product weight measuring unit, a second tapping amount calculating unit for determining a tapping amount of the melt by a yield with respect to a tapping amount of the melting furnace, and the tapping amount; A rock wool manufacturing apparatus, comprising: a correction circuit that corrects the set tapping amount set by the setting unit according to the tapping amount obtained by the second tapping amount calculation unit.