JPS61114750A - Operation of shaking type coarse dividing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is applicable to the treatment of various types of furnace slag generated during iron and steel manufacturing processes, which have a high iron content of 50 to 60 inches or more, and whose dimensions are small. The present invention relates to a method of operating a swing-type rough-splitting machine capable of efficiently rough-splitting or deforming large lumps of furnace slag of 300 to 500 dew or more.

(Prior art and its problems) Most of the blast furnace slag, converter slag, electric furnace slag, etc. generated in the iron and steel manufacturing processes were disposed of by dumping. The iron content inside is recovered and the slag is used as aggregate.

This is an attempt to recover iron by magnetism during the process of crushing furnace slag as concentrate for iron and steel manufacturing.
Furthermore, a rod mill is used for the purpose of increasing the iron content as a concentrate for iron and steel manufacturing.

Efforts have also been made to grind ore using an autogenous grinding mill.

By the way, many furnace slags with a size of 300 m or more and high iron content are piled up untreated, and their disposal is entrusted to interrogators and is carried out by the following method.

(b) Dropping a weight of about 2 to 5 tons.

Offshore) gas cutting.

(c) Drill a hole and treat with dynamite.

2) Drill a number of holes in a criss-cross pattern and drive steel rods into them.

Therefore, the processing by interrogators of bulk furnace slag with a size of 300 pieces or more and high iron content is an inefficient work that requires human labor, and is also a work with a high risk of scattering of furnace slag and iron pieces. Ta.

For this reason, the applicant first decided to increase the iron content to 50%.
It is high at ~60 cm or more, and its dimensions are 300 to 500 cm.
We have developed an oscillating type rough-splitting machine that can efficiently rough-split or deform large chunks of furnace slag larger than m. (Special application 1982-23
No. 20) The oscillating rough splitting machine is explained with reference to FIGS. 1 and 2. 1 is a fixed rough splitting plate fixed perpendicularly to the left side wall of the casing 2, and 3 is a fixed rough splitting plate facing opposite to the fixed rough splitting plate. The swinging rough dividing plate 3 is fixed to a jaw 5 that swings back and forth while moving up and down using an eccentric shaft 4 as a fulcrum. The eccentric shaft 4 has its shaft end directly connected to the rotating shaft 6, and is integrated with the rotating shaft 6. A V-boo 97 is fixedly installed on the rotating shaft 6, and this V-pulley 7 is connected to the V-pulley 7 on the output shaft of an electric motor (not shown). A V-belt 8 is installed between them. Reference numeral 9 denotes a rough dividing chamber formed between the fixed rough dividing plate 1 and the swinging rough dividing plate 3.

The opposing surface shapes of the fixed rough dividing plate 1 and the swinging rough dividing plate 3 are as follows:
The rough-splitting-like entrance, that is, the entrance 11 at the upper end of the rough-splitting chamber 9 has a wavy shape in which peaks 11 and valleys 12 face each other in the radial direction. The number of ridges 11 on the surface of one coarsely divided plate is three, and the number of ridges 11 on the surface of the other coarsely divided plate is four.

The dimension between the fixed rough dividing plate 1 and the swinging rough dividing plate 3 facing each other at the outlet 13 at the lower end of the rough dividing chamber 9 is the same as that of the fixed rough dividing plate 1 facing each other at the entrance 10 at the upper end of the rough dividing chamber 9. The oscillating coarse plate 3 is made to be 175 to 2/5 of the dimension between these, and the oscillating coarse plate 3 can maintain a constant compressive force, and has a structure on the back side of the oscillating coarse plate 3. A hydraulic mechanism 14 is provided which can be retracted in the event of an overcoming reaction force.

This hydraulic mechanism 14 includes a hydraulic cylinder 15 provided at the lower right side of the casing 2, a slide block 16 attached to the tip of the piston rod of the hydraulic cylinder 15, and a space between the slide block 16 and the lower back surface of the swing jaw 5. It consists of a stretched trouble plate 17.

Reference numeral 18 denotes a trouble sheet which abuts both front and rear edges of the trouble plate 17.

The front end of a horizontal sliding rod 20 is pivotally supported at the lower end of the swinging jaw 15, and the sliding rod 20 is provided so as to be able to slide through the base 2/. Spring retainer 2
2 and the base 2/A spring 23 is fitted to the sliding rod 20 between them.

In the oscillating coarse cracker configured as above, the lumpy furnace slag S, which is 300 to 500 mm or more and has an iron content of 5o to 60% or more, which is input from the entrance 10 of the coarse cracking chamber 9, is oscillated. The moving oscillating rough dividing plate 3 is pressed against the υ fixed rough dividing plate 1, and compressive force is applied repeatedly in the form of three-point bending as shown in Fig. 2 by being sandwiched between the peaks 11 of the corrugated surfaces of both, and the hydraulic pressure is applied. Pressure is generated in the hydraulic cylinder 15 of the mechanism 14.

If the pressure of this hydraulic cylinder 15 is less than the holding force of the hydraulic system and the lumpy slag S is roughly split, when the oscillating rough splitting plate 3 moves away from the fixed rough splitting plate 1 side, the roughly split slag will be affected by gravity. It descends and is roughly divided again by the oscillating coarse dividing plate 3 under compressive force.
This is repeated several times, and when the size becomes smaller than the normal gap W' of the outlet 13 of the rough-cutting chamber 9, the particles are discharged from the outlet 13 and fall.

On the other hand, when the pressure of the rocking rough-splitting plate 3 exceeds the holding force of the hydraulic system during compression of the lumpy slag S, in other words, if a reaction force that overcomes the compression force of the rocking rough-splitting plate 3 is generated in the lumpy slag S. , the pressure oil in the hydraulic cylinder 15 is returned to the hydraulic unit, and the rocking coarse plate 3 retreats by the rocking stroke that compresses the lumpy slag S by the holding force of the hydraulic system, and the gap W of the outlet 13 is reduced. expands.

Therefore, the lumpy slag S falls down under its own weight, and is again subjected to the compressive force of the rocking coarse plate 3, causing a small amount of deformation or partial peeling. In this way, the furnace slag that cannot be roughly divided is gradually deformed or partially peeled off from the slag with low iron content.
The discharge will fall.

Thus, the iron content is 50 for dimensions of 300 to 500 m or more.
~60% of the lumpy furnace slag S is continuously and efficiently coarsely cracked or deformed to a size of 300 to 500 W+ or less,
Moreover, the iron content is increased to 90% or more.

By the way, in the operation of the above-mentioned oscillating coarse-splitting machine, the lumpy furnace slag S that has been reliably bitten into the rough-splitting chamber 9 is coarsely divided as described above, or the oscillating coarse-splitting plate is rotated by the oscillating stroke. 3 undergoes deformation as it retreats, but depending on the shape and properties of the lumpy furnace slag S, it may not be reliably bitten into the rough-splitting chamber 9 and may escape upward within the rough-splitting chamber 9. Such a lumpy slag S
Even if the oscillating rough dividing plate 3 is oscillated as it is, the compressive force is not applied effectively and the compressive force remains in the coarse dividing chamber 9 for a long time. In such cases, stop operation and
Either lift the lumpy slag S upward and discharge it, or use the hydraulic mechanism 1.
4, the exit size of the rough-splitting chamber 9 can be greatly expanded to discharge the raw material downward, which has the problem that the operating time of the swing-type coarse-splitting machine is significantly reduced.

(Object of the Invention) The present invention has been made to solve the above-mentioned problems, and is a method of operating an oscillating coarse-splitting machine that can reliably coarse-split lump furnace slag without allowing it to remain in the coarse-splitting chamber. The purpose is to provide the following.

(Structure of the Invention) The operating method of the oscillating rough-splitting machine of the present invention is such that while applying a constant compressive force to the material to be coarse-split and performing rough-splitting, a reaction force that overcomes the compressive force is not generated. Even if the dimension between the opposing roughing plates at the outlet of the lower end of the roughing chamber is set to 1/10 to 1/10 of the initial setting value,
It is characterized by expanding and contracting in stages at a rate of 15.

In the operating method of the oscillating rough splitting machine of the present invention, the reason why the outlet dimension of the lower end of the rough splitting draft is gradually expanded or reduced at a ratio of 1710 to 115 of the initial setting value is as follows. This is to change the contact position of the rough splitting plate as the lumpy slag introduced into the splitting chamber falls downward step by step, and to roughly split or deform the lumpy slag. There is little change in the contact position of the plate, and the range of the smooth sliding surface is simply expanded! 5. If the value exceeds 115, the contact position of the coarse plate will change, but since it is not possible to increase the number of changes, find a position where the lumpy furnace slag will not be caught upwards, but will be firmly caught. ``It takes too long to complete the process, and as a result, we have no choice but to temporarily stop the operation of the coarse splitter halfway through the process.

Set the exit dimension of the lower end of the rough split draft to 1/1° to 11° of the initial setting value.
By expanding or contracting in stages at a rate of 5, the amount of change in the outlet dimension is approximately the same as the stroke amount of the oscillating coarse plate, and when viewed from the coarse plate side, the block furnace The slag begins to come into contact at a completely different location.

(Example) An example of the operating method of the oscillating rough splitter of the present invention will be described. Entrance 10 of the rough-splitting chamber 9 of the rocking-type rough-splitting machine shown in FIG.
Iron content 50~ with dimensions of 300~500fi or more
When 60% or more of the lumpy furnace slag S is introduced, it is pressed against the fixed coarse dividing plate 1 by the oscillating coarse dividing plate 3, and is sandwiched between the peaks 11 of the corrugated surfaces of both, as shown in Fig. 2. Compressive force is repeatedly applied in the form of a three-point crusher, and pressure is generated in the hydraulic cylinder 15 of the hydraulic mechanism 14.

In this way, even if a reaction force is not generated in the hydraulic mechanism 14 to overcome the compressive force of the rocking rough splitting plate 3 on the block slag S while applying a certain compressive force to the block slag S and performing rough splitting. , opposing rough cutting plates 1 and 3 at the outlet 13 at the lower end of the rough cutting chamber 9
The dimensions of
The image is enlarged or reduced in stages at a ratio of 0 to 115, and in this example, at a ratio of 1/7.

As a result, the lumpy furnace slag S charged into the rough-splitting chamber 9 gradually descends downward while expanding the outlet gap W' step by step. As the position changes, the rough splitting plate 1.3 is securely bitten by the coarse splitting plate 1.3, and it is roughly split under the compressive force of the swinging coarse splitting plate 3, and the outlet 13 of the rough splitting chamber 9 is opened.
It fell down. And even in this driving operation, the rough split plate 1,
3 This contact position does not change, and therefore the lumpy furnace slag S, which is not bitten by the rough splitting plates 1 and 3 and escapes upward, is coarsely split by reducing the exit gap W' step by step. Board 1.
3'' This contact position changes, and within that time, the rough split plate 1,
3, and was roughly divided by the compressive force of the swinging coarse dividing plate 3, and discharged and fell through the outlet 13 of the coarse dividing chamber 9.

Thus, the iron content is 50 for dimensions of 300 to 500 m or more.
The ~60% lump S slag S is continuously and efficiently coarsely crushed without stopping the operation of the coarse crusher, resulting in 300~50%
The size was 0.0 mm or less, and the iron content was increased to 90 mm or more.

(Effects of the Invention) As can be seen from the above explanation, the operating method of the oscillating coarse cracker of the present invention allows the outlet gap of the coarse cracking chamber to be set to 1/10-11 of the initial setting value.
It will be enlarged or reduced in stages at a rate of 5, so
The contact position of the rough-splitting plates changes, and the lumpy furnace slag is firmly caught between the opposing rough-splitting plates, and is reliably coarse-split under the compressive force of the oscillating rough-splitting plates. It does not stay in the room. Therefore, without stopping the operation of the oscillating coarse cracker, the lumpy furnace slag can be coarsely cracked continuously and efficiently.
This has the effect of significantly improving the recovery efficiency of steelmaking concentrate.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of the rocking type rough splitter, and Figure 2 is its A-A
It is a line cross-sectional plan view. 1...Fixed coarse plate 2...Casing 3...
・Swinging coarse plate 4... Eccentric shaft 5... Jaw 6
...Rotating axis T...V gooley 8・-Vbe/I
/) 9...Rough cutting room 10...Entrance 11...
Mountain 12...Valley 13...Outlet 14...Hydraulic mechanism 15-...Hydraulic cylinder 16...Slide block 17-) Rubble plate 18...Guru seat 20...Sliding rod 2/...-base Stand 22...
・Spring holder 23... Spring S... Blocked furnace slag W・- Population gap W'・- Outlet gap

Claims (1)

[Claims] The surface shape of the fixed rough-splitting plate and the oscillating rough-splitting plate, which apply compressive force to the material to be rough-split, is shaped like a wave with peaks and valleys facing each other in the width direction, and a rough-splitting chamber is formed between the two rough-splitting plates. The dimension between the opposing coarse dividing plates at the outlet of the lower end is set to 1/5 to 2/5 of the dimension between the opposing coarse dividing plates at the entrance of the upper end of the coarse dividing chamber, and the back surface of the swinging coarse dividing plate In the operation of the oscillating coarse-splitting machine, there is a hydraulic mechanism on the side that allows the oscillating rough-splitting plate to maintain a constant compression force and to retreat when a reaction force that overcomes the compression force is generated. During rough splitting by applying a certain compressive force to the material to be roughly split, even if no reaction force is generated to overcome the compressive force, there is a 1. A method of operating an oscillating rough splitter, which stepwise increases or decreases the dimensions at a rate of 1/10 to 1/5 of an initial setting value.