JPH039778B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an automatic operation control method for an oscillating coarse splitter.

[Conventional technology] Blast furnace slag, converter slag, electric furnace slag, etc. generated in the iron and steel manufacturing processes are separated into iron by using an oscillating coarse splitter in order to recover the iron content in the furnace slag and utilize the slag. The content is high at 50-60% or more, and its dimensions are
The bulk furnace slag of 300 to 500 mm or more was roughly divided or deformed. (For example, Japanese Unexamined Patent Publication No. 147252/1983) By equipping such a rocking type rough splitting machine with a hydraulic mechanism, the operation becomes smooth during rough splitting or deformation of the lumpy furnace slag, and its function is improved. became possible. (For example, patent application 1983-
(No. 108104) However, depending on the properties and shape of the lumpy furnace slag, even if normal rocking motion is given to the rocking roughing plate, the biting in the roughing chamber may not be sufficient.
Appropriate compressive force may not be applied, and when operating under such rough cracking conditions, the contact position of the lump slag in the rough cracking chamber can be changed by expanding or contracting the rough cracking gap in stages. Then, the biting was ensured, the coarse cracking was performed under the action of sufficient compressive force, and the material was discharged from the outlet of the coarse splitting chamber.

The expansion and contraction of the rough cracking gap at this time is 1/10 to 1/5 of the initial setting value, and by changing it in stages, it is possible to increase or decrease the rough cracking gap in the block furnace without stopping the operation of the oscillating rough cracker. The slag was continuously coarsely divided. (For example, Japanese Patent Application No. 59-236470) [Problems to be Solved by the Invention] However, in the above-mentioned conventional method of controlling the operation of the oscillating coarse cracker, the coarse cracking process differs depending on the shape and properties of the lumpy slag. It was not possible to reliably grasp the tendency of fluctuations in the oil pressure of the hydraulic mechanism, which varies depending on the situation and compression force, so adjustments were made by expanding or reducing the coarse cracking gap of the swing type rough splitting machine in stages. There was a problem in that it was not easy to control the operation.

In particular, when the lumpy slag is supplied to the rough-splitting chamber and bridging or adhesion occurs between the lumpy slag or between the rough-splitting plate and the lumpy slag in the rough-splitting chamber,
Even if the hydraulic signal of the hydraulic mechanism is in a no-load state, the lumpy slag may remain in the rough cracking chamber, and there is a problem in that it is not possible to reliably grasp the rough cracking status of the lumpy slag. .

The present invention solves these conventional problems, and it is possible to reliably and over time check the tendency of fluctuations in the oil pressure of the hydraulic mechanism, which differs depending on the coarse cracking condition and compression force, which differ depending on the shape and properties of the lump slag. Automatic operation control can be carried out in the process from when the lumpy slag is fed to the rocking coarse cracker and from the start of rough cracking until the coarse cracking gap is adjusted at predetermined time intervals and the discharge is completed. The object of the present invention is to provide an excellent automatic operation control method for an oscillating rough-splitting machine that can improve the rough-splitting operation by promoting sufficient biting of lump furnace slag in the rough-splitting chamber. .

[Means for solving the problem] In order to achieve the above-mentioned object, the present invention provides a rocking type that adjusts the coarse cracking gap by expanding or contracting it step by step using a hydraulic mechanism depending on the coarse cracking situation of the lump furnace slag. In the automatic operation control method for a rough splitting machine, the hydraulic pressure of the hydraulic mechanism is detected and used as a variable for the rough splitting situation, and the block furnace slag is supplied to the swing type rough splitting machine for a predetermined period of time from the start of the rough splitting. The rough dividing gap is adjusted by comparing the oil pressure with a set value at each interval.

[Function] The present invention has the following effects due to the above configuration. In other words, when supplying the block slag to the rocking type rough splitter and performing the rough splitting or deformation operation of the block furnace slag, the rough splitting condition is determined by the hydraulic pressure generated in the hydraulic system of the hydraulic mechanism of the swing type rough splitter. After confirming the above, the rough cutting gap is expanded step by step at predetermined time intervals to proceed with the rough cutting, and after the rough cutting is completed, the rough cutting gap is expanded step by step at predetermined time intervals. Shrink it. In addition, the lump slag is supplied to the coarse cracking chamber,
If bridging or adhesion occurs between the lumpy slag or between the roughing plate and the lumpy slag in the roughing chamber, the lumpy slag will become coarse even if the hydraulic signal of the hydraulic system is in a no-load state. At this time, the rough splitting gap is gradually reduced at predetermined time intervals, and in this process, the hydraulic signal of the hydraulic system exhibits a load state, so that the rough splitting is performed again. Rough cracking progresses as the gap is expanded step by step, and the size of the lump furnace slag gradually decreases in size as it flows smoothly inside the rough cracking chamber, avoiding the occurrence of bridging and adhesion of the block slag as described above. Automatic operation control is performed to complete the rough slicing.

Therefore, it is possible to grasp the fluctuation trend of the coarse cracking status of the lumpy slag reliably and over time, and the coarse cracking can be progressed by constantly adjusting the rough cracking gap in stages at each predetermined time interval. Therefore, the contact position of the lump furnace slag in the rough cracking chamber is changed to ensure that it is caught, and rough cracking is performed with sufficient compressive force.
Even if the dimensions are reduced and the shape and properties of the lumpy slag vary, the rough-splitting function can be significantly improved.

[Example] Hereinafter, implementation of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the configuration of an embodiment of the present invention.

In Fig. 1, 10 indicates the main parts of the oscillating coarse splitting machine, 1 indicates the fixed coarse splitting plate, 2 indicates the oscillating coarse splitting plate, and S indicates the fixed coarse splitting plate 1 and the oscillating rough splitting plate. This is the rough split gap formed by 2. Reference numeral 3 indicates a slide block, and reference numeral 5 indicates a hydraulic cylinder, which are connected to a hydraulic mechanism 4 through a hydraulic system 4a, and 4b and 4c are pressure gauges for detecting the oil pressure of the hydraulic system 4a, respectively. 6 is an example of a detection device for detecting the amount of movement of the slide block 3, and its detailed structure is shown in FIG.
Reference numeral 7 designates a control circuit into which signals including hydraulic signals 4d, 4e and position signal 6b are input, and an output signal 8 of the control circuit 7 controls the operation of the hydraulic mechanism 4. Further, the control circuit 7 is provided with a clock circuit.

The rough splitting gap S of the oscillating rough splitting machine 10 can be changed from a MIN value to a MAX value by operating the hydraulic mechanism 4. At this time, the rough dividing gap S is shown on the open side, and the value on the closed side is decreased by the value of the swing stroke. The change in the rough cutting gap S from the MIN value to the MAX value due to the movement of the slide block 3 does not change with a continuous value of the amount of movement, but with step values.

With the operation of the rocking type rough splitter 10, in order to obtain coarse cracking or deformation of the lumpy slag during normal operation, the lumpy furnace slag is supplied to the rocking type rough splitter 10 and the rocking rough splitting plate is used. 2 applies compressive force, and at this time, hydraulic pressure is generated in the hydraulic system 4a of the hydraulic mechanism 4, and when the holding force of the hydraulic system 4a is lower than the holding force, the rough splitting or deformation operation is interrupted. Thus, it is confirmed that rough cutting has started, and the timing circuit of the control circuit 7 is activated, and the output signal 8 of the control circuit 7 accordingly controls the operation of the hydraulic mechanism 4, and the hydraulic system is activated at predetermined time intervals. 4a to expand the rough cracking gap S step by step,
After the rough cutting is completed, the rough cutting gap S is gradually reduced at predetermined time intervals via the hydraulic system 4a.

In addition, when operating the oscillating rough-splitting machine 10, the oscillating rough-splitting plate 2 is oscillated under an arbitrary rough-splitting gap S to perform a rough-splitting action on the lumpy furnace slag. It is supplied to the splitting chamber, starts rough splitting, is gradually reduced in size, and is discharged from the exit of the coarse splitting chamber. Due to the irregular nature and shape of this lump-like furnace slag, it is difficult to discharge it through steady downward movement, and bridging occurs not only between the lump-like furnace slag but also between the coarse plate and the block-like furnace slag within the rough-breaker chamber. Even if the hydraulic signal 4d of the hydraulic system 4a exhibits a no-load state, the lumpy furnace slag may remain in the roughing chamber. In this case, the rough dividing gap S is reduced step by step at every predetermined time interval, and in this process, the hydraulic signal 4d of the hydraulic system 4a exhibits a load state, so that the rough dividing gap S is reduced step by step again. Rough cracking progresses as it expands, avoiding the occurrence of bridging and adhesion of the lumpy slag as described above, and the size of the lump slag gradually decreases in the rough cracking chamber as it flows smoothly, completing the rough cracking. do.

At this time, the rough cracking action of the lump slag in the rough cracking chamber varies depending on the shape and properties of the individual lump slag, especially from the boundary area where the iron content is low, the slag content is high, and the strength is low. Rough splitting progresses.

FIG. 2 shows the relationship between the rough splitting gap S and the step value of the oscillating rough splitting machine 10 according to the present invention.
In Figure 2, the step values are 0, 1, 2, 3,
4, 5,...n, the rough cutting gap S changes stepwise from the MIN value to the MAX value, and the oscillating rough cutting gap S changes stepwise from the MIN value to the MAX value. The machine 10 can be operated. At this time, the step value is MIN of the rough cutting gap S.
The ratio is 1/10 to 1/5 of the difference between the value and the MAX value.

As described above, with the operation of the oscillating coarse cracker 10, hydraulic pressure is generated in the hydraulic system 4a of the hydraulic mechanism 4, but it is difficult to detect this hydraulic pressure depending on the shape and properties of the lumped furnace slag, as well as rough cracking or It can be used as a variable of the rough division situation that indicates the progress of deformation and its difficulty. Then, a hydraulic pressure setting value and a time interval setting value are determined for automatic operation control, and operations corresponding to the variables of the rough dividing situation are performed.

FIG. 3 shows a control circuit of the present invention, and its operation will be explained with reference to FIG.

The first setting value P1 of the oil pressure determines whether the lumped furnace slag is not sufficiently chewed due to getting caught at the inlet of the rocking coarse cracker 10, or whether it has been completely discharged from the coarse cracking chamber. The second set value P2 corresponds to the hydraulic pressure of
Corresponds to the hydraulic pressure that indicates the appropriate compression action for rough splitting or deformation.

Before the start of automatic operation, the oscillating coarse splitter 10 is already operating in a no-load state. When the lumped furnace slag is first supplied and automatic operation is started, determination means 71 determines whether the oil pressure P is larger than the first set value P1, and if NO, the automatic operation is stopped with an alarm. This state indicates that the lumpy slag was not caught in the rocking type rough splitter 10 and continued to idle. If YES, the determination means 72 is instructed. The determining means 72 determines whether or not the rough cutting gap S is equal to the MAX value in conjunction with the command in the case of YES from the determining means 75, and in the case of YES, the automatic operation is stopped with an alarm. In the case of NO, the determination means 73 is instructed.

The determining means 73 determines whether the oil pressure is greater than the second set value P2, and if YES, the operation 74 is performed.
If the answer is NO, a command is given to the hydraulic mechanism 4 to enlarge the rough cutting gap S by one step.

Thus, the time point at which rough cutting is started is reached by operation 74, and the timing circuit is activated to issue a command to the hydraulic mechanism 4 to enlarge the rough cutting gap S by one step every time a predetermined period of time has elapsed.

The determining means 75 determines whether the load is larger than the set value P1 along with the command from the operation 74 and the determining means 76 in the case of NO, and in the case of YES, the command is sent to the determining means 72 to repeat the control. .
In the case of NO, the determination means 76 is commanded.

Next, the rough cutting gap S is determined by the determining means 76.
Determine whether it is equal to the MIN value, and if YES, complete the process. In the case of NO, a command is given to the hydraulic mechanism 4 to reduce the rough splitting gap S by one step, and a command is also sent to the determining means 75 to repeat the control.

In this way, according to the above embodiment, in the automatic operation method of the rocking type coarse cracker, the block furnace slag is supplied to the rocking type rough cracker, and the rough cracking status is controlled by the hydraulic pressure generated in the hydraulic system of the hydraulic mechanism. After checking, the rough cutting gap can be continuously adjusted at predetermined time intervals.
Even if there are variations in the shape and properties of the lumped furnace slag, it is possible to avoid cross-linking and adhesion between each other and the rough-splitting plates during rough-splitting or deformation operations, and to ensure smooth clumping and improve processing capacity. Functionality can be significantly improved.

FIG. 4 shows an example of the structure of a detection device for detecting the amount of movement of the slide block 3. In Fig. 4, 6 is a detection device and 6a is a dot, which is attached to the slide block 3.
move as one. 6b and 6c are mounting bases for limit switches 6d and 6e, respectively;
It is attached together with the detection device 6 at a fixed position on the swing type coarse splitter 10. Limit switch 6d, 6
e are step values 0, 1, 2, 3, 4, respectively.
They are attached as a pair at positions corresponding to 5, . When pressed, it indicates a conductive state, and when it is not pressed, it indicates a non-conductive state. Furthermore, by attaching them in pairs at positions corresponding to the step values, unstable operation caused by the use of a single limit switch can be prevented, and the operation of the hydraulic mechanism 4 can be ensured.

It goes without saying that the aspects of the oscillating rough splitter, detection device, hydraulic signal, etc. used in this invention are not limited to those of the above-described embodiments.

[Effects of the Invention] As is clear from the above embodiments, the present invention uses a relatively simple configuration and can reliably control the fluctuation tendency of the hydraulic pressure in the hydraulic system even if there are fluctuations in the shape and properties of the block slag. The coarse cracking or deformation caused by the operation of the oscillating rough splitting machine is monitored over time, and the rough splitting gap is adjusted at predetermined intervals to perform continuous automatic operation control during the process until the end of discharge. By avoiding the occurrence of cross-linking and adhesion phenomena between mutual and rough-splitting plates during operation, it is possible to smoothly jam, etc., and the throughput of the rocking-type rough-splitting machine can be enhanced, and its functions can be significantly improved. The effects of this are enormous.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram of an automatic operation control method for an oscillating rough splitting machine according to an embodiment of the present invention, FIG. 2 is an explanatory diagram showing the relationship between the rough splitting gap and step value in the same method, and FIG. The figure is a control circuit diagram of the same method, and FIG. 4 is a detailed diagram of a movement amount detection device. 4... Hydraulic mechanism, 6... Detection device, 7... Control circuit, 10... Oscillating rough splitting machine, S... Rough splitting gap.

Claims (1)

[Claims] 1. In an automatic operation control method for an oscillating rough-splitting machine that adjusts the rough-splitting gap by expanding or contracting it in stages using a hydraulic mechanism depending on the rough-splitting situation of the lump furnace slag, the method comprises: detecting the oil pressure of the hydraulic mechanism; In addition to making it a variable of the rough-cutting situation, the rough-cutting gap is adjusted by supplying the lump furnace slag to an oscillating rough-cutting machine and comparing the oil pressure with a set value at predetermined time intervals from the start of rough-cutting. An automatic operation control method for an oscillating rough splitting machine characterized by: