JPS6243742B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is applicable to the treatment of various types of furnace slag produced in the iron and steel manufacturing processes. The present invention relates to an improvement in the hydraulic mechanism of a swing-type rough-splitting machine that is capable of efficiently rough-splitting or deforming large lumps of furnace slag of ~500 mm or more.

(Prior technology) 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. Iron content is recovered and the slag is used as lubricant.

In the process of crushing furnace slag, the iron content is recovered as concentrate for iron and steel making using magnetism. Efforts have also been made to grind ore using an autogenous grinding mill. Examples of these prior art techniques include Japanese Patent Publication No. 51-33047, Japanese Patent Application Publication No. 147416-1970, Japanese Patent Application Publication No. 151616-1971, and Japanese Patent Application Publication No. 1977-151616.
There are descriptions in various publications such as -33163. By the way, the contents of these prior art examples are summarized as follows: (1) The maximum dimension of the furnace slag to be treated is usually 300 mm, and even in special cases it is 500 mm or less.

(2) Furnace slag with a high iron content of 50 to 60% with dimensions of 300 mm or less is usually converted into concentrate as is, or polished with a rod mill or autogenous grinding mill to increase the iron content to 90% or more. It is made into concentrate.

(3) Furnace slag with a size of 300 mm or less and a low iron content can be crushed, magnetically sorted, and sieved to be converted into concentrate, or polished with a rod mill or autogenous grinding mill to reduce the iron content. It is made into a concentrate by raising it to some extent.

(4) Furnace slag with a size of 500 mm or more is sorted using a lifting magnet or visually, and only the furnace slag with a low iron content is crushed to a size of 300 mm or less, and various treatments are carried out.

(5) Furnace slag with a size of 300 mm or more and a high iron content is often piled up untreated, and its disposal is outsourced to specialized companies and carried out using the following method.

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

(b) Gas cutting.

(c) Drill a hole and treat with dynamite.

(d) Drill a number of holes in a cross pattern and drive steel rods into them.

Therefore, the treatment of bulk furnace slag with a size of 300 mm or more and high iron content by a specialist 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.

In order to solve such problems, the present inventors
First, we developed a swing-type rough splitting machine, which was patented in patent application No. 1982-2320. This oscillating rough splitting machine will be explained with reference to FIGS. 4 and 5. 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 that faces the fixed rough splitting plate. The rocking rough dividing plate 3 is fixed to a jog 5 which 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 a rotating shaft 6 and is integrated with the rotating shaft 6. A V pulley 7 is fixedly installed on the rotating shaft 6, and this V pulley 7 and a V pulley on the output shaft of an electric motor (not shown) are connected to each other. A V-belt 8 is installed between the two. 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-splitting plate 1 and the oscillating rough-splitting plate 3 are arranged at the entrance of the rough-splitting machine, that is, the entrance 1 at the upper end of the rough-splitting chamber 9.
It has a wavy shape in which peaks 11 and valleys 12 face each other in the width direction. And the mountain 11 on the surface of one rough plate
The number of ridges 11 on the surface of the other coarsely divided plate is 2 to 4. In the illustrated example, the fixed rough dividing plate 1 has three ridges, and the oscillating rough dividing plate 3 has four ridges in a wave shape.

In this way, the number of ridges 11 on the surface of one rough plate is reduced to 1.
~3. The reason why the number of peaks 11 on the surface of the other coarsely divided plate is set to 2 to 4 is that, as shown in the figure, the block furnace slag S
This is to apply compressive force in the form of three-point bending to roughly split the material.If the number of ridges 11 on the surface of the rough-splitting plate is greater than this, the reduction in compressive force due to three-point bending will be lost, resulting in a blocky furnace slag S that cannot be roughly split. This is because many occur.

However, the dimension between the opposing fixed rough dividing plate 1 and the swinging coarse dividing plate 3 at the outlet 13 at the lower end of the rough dividing chamber 9 is the same as the dimension between the opposing fixed rough dividing plate 1 and the swinging rough dividing plate 3 at the outlet 10 at the upper end of the rough dividing chamber 9. It is made to be 1/5 to 2/5 of the dimension between the plate 1 and the oscillating rough dividing plate 3, and the back side of the oscillating rough dividing plate 3 has a swinging plate in order to automate the change of the gap of the outlet 13. A hydraulic mechanism 14 is provided that allows the rough dividing plate 3 to maintain a constant compressive force and to retreat when a reaction force that overcomes the compressive force is generated.

The dimensions of the outlet 13 of the coarse cutting chamber 9 are the dimensions of the inlet 10.
The reason why it is set to 1/5 to 2/5 is that when rough-splitting a hard metal with high compressive strength, the gap W' at the outlet 13 of the rough-splitting chamber 9 is smaller than the gap W at the entrance 10 of the rough-splitting chamber 9. (0.2
This is because by setting the value to ˜0.4)×W, most of the metal in the block slag S is discharged while being roughly broken or deformed.

The hydraulic mechanism 14 includes a hydraulic cylinder 15 provided at the lower right side of the casing 2, a slideable toggle block 16 attached to the tip of the piston rod 15a of the hydraulic cylinder 15, and a structure between the toggle block 16 and the lower back surface of the swing jaw 5. It consists of a toggle plate 17 which is stretched over the toggle plate 17.
Reference numeral 18 denotes a toggle seat that abuts both front and rear edges of the toggle plate 17.

The front end of a horizontal sliding rod 20 is pivotally supported at the lower end of the swing jaw 15, and this sliding rod 20 is connected to the base 2.
A spring 23 is fitted into the sliding rod 20 between a spring receiver 22 provided at the rear end of the sliding rod 20 and a base 21.

In the oscillating rough cracking machine configured as described above, the lump S slag S having a diameter of 300 to 500 mm or more and having an iron content of 50 to 60% or more is fed into the coarse cracking chamber 9 from the inlet 10. When the oscillating rough-splitting plate 3 approaches the fixed rough-splitting plate 1 side due to the oscillating movement of the oscillating rough-splitting plate 3 in the rough-splitting chamber 9, the space inside the rough-splitting chamber 9 becomes narrow, and a compressive force is applied to the lumpy furnace slag S. is applied, and pressure is generated in the hydraulic cylinder 15 of the hydraulic mechanism 14. When the pressure of the hydraulic cylinder 15 is below the holding force of the hydraulic system, the lumpy slag S is roughly split, and when the oscillating rough splitting plate 3 moves away from the fixed rough splitting plate 1 side, the roughly split slag is broken by gravity. It descends and is roughly divided again by the compressive force by the oscillating rough dividing plate 3, and this is repeated several times to create a normal gap at the outlet 13 of the coarse dividing chamber 9.
If the size is less than W', it will be discharged and dropped from the outlet 13.

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 returns to the hydraulic unit 19, and the rocking rough splitting plate 3 retreats by the rocking stroke while compressing the lumpy slag S by the holding force of the hydraulic system, and the gap W of the outlet 13 is reduced. spread. Therefore, the lumpy slag S falls down due to its own weight, and is moved again to the rocking coarse plate 3.
A small amount of deformation or partial peeling occurs under the compressive force of . In this way, the furnace slag that cannot be roughly divided is discharged through the outlet 13 and falls through gradual deformation or partial peeling of the iron-poor slag.

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

(Problems with the Prior Art) By the way, in the hydraulic cylinder 15 of the hydraulic mechanism 14 of such a swing-type coarse splitter, oil enters the rear chamber and air enters the front chamber.
5a and the rod cover 15c incorporated in the cylinder tube 15b, and some of the oil in the rear chamber flows into the piston 15.
A portion of the oil leaks into the front chamber through the piston packing 15e in the gap between the piston rod 15b and the piston rod 15b, and this leaked oil accumulates in the front chamber.
It was leaking to the outside through the gap between a and the rod cover 15c.

On the other hand, the operating environment of the oscillating rough cracker is one where there is a lot of dust generated during the rough cracking or deformation of lumpy furnace slag. Contains a lot of fine powder. Therefore, in the hydraulic mechanism 14 equipped with the hydraulic cylinder 15,
The above-mentioned dust may enter the front chamber of the hydraulic cylinder 15 through the gap between the piston rod 15a and the rod cover 15c, or it may stick to the gap between the piston rod 15a and the rod cover 15c along with the oil leaking outside. be.

As a result, air dust in the front chamber of the hydraulic cylinder 15 enters the sliding portion between the cylinder tube 15b and the piston packing 15e, and is rubbed by the operation of the hydraulic cylinder 15. Also, the piston rod 15a
The same thing happens in the gap between the rod cover 15c and the rod cover 15c. This causes wear and damage to the piston packing 15e, piston rod 15a, and rod cover 15c, and the life of the hydraulic cylinder 15 is significantly shortened.

Therefore, it is possible to reduce the gap between the piston rod 15a and the rod cover 15c of the cylinder tube 15b as much as possible and install a dust seal. The oil leakage is not smooth, and the piston 15
When moving forward in step d, pressure is generated due to the compression of the air in the front chamber (or pressure due to the compression of the oil leaking from the rear chamber and stored in the front chamber), which reduces the output of the hydraulic cylinder 15. A portion of this will be consumed for this purpose. Also piston 15d
When the piston 15d is retracted, a negative pressure is generated in the front chamber, and the piston 15d will not retract unless more than necessary force is applied.

As mentioned above, the oscillating rough splitter has an iron content of 50~
The hydraulic mechanism 14 supports the necessary force for this purpose, and also partially cracks or deforms large chunks of furnace slag with a high rate of 60% or more and a size of 300 to 500 mm or more. For large lumps of furnace slag that are not cracked, the outlet gap W' is gradually widened according to the amount and number of swings of the oscillating rough splitting plate, giving it a small amount of deformation or partial peeling. If the operation is not smooth, the force for rough cracking may be insufficient, large lumps of furnace slag may slip, and the exit gap may become unstable.
Because W' does not spread smoothly, an excessive load is generated on each part of the machine, which can damage the oscillating coarse splitter.

(Purpose of the Invention) The present invention was made to solve the problems of the hydraulic mechanism of such a swing type coarse splitter, and to prevent slag dust from entering the front chamber of the hydraulic cylinder, and to The present invention provides a hydraulic mechanism suitable for the operating environment of a swing-type coarse cracker by preventing oil leaked from the chamber into the front chamber from accumulating in the front chamber. The purpose is to make the rough splitting or deformation operation smooth, improve functionality, and prevent damage.

(Structure of the Invention) The hydraulic mechanism of the oscillating rough-splitting machine of the present invention has a fixed rough-splitting plate that applies compressive force to the object to be rough-split and a oscillating rough-splitting plate that face each other in a surface shape that is located at the entrance of the rough-splitting machine. The shape is such that the peaks and valleys face each other in the width direction, and the number of ridges on the surface of one rough dividing plate is 1 to 3, and the number of ridges on the surface of the other rough dividing plate is 2.
~4, so that a bending load is applied to the object to be roughly divided, and the dimension between the opposing roughing plates at the outlet of the lower end of the roughing chamber is the same as the dimension between the opposing roughing plates at the entrance of the upper end of the roughing chamber. In an oscillating coarse-splitting machine with a size of 1/5 to 2/5, the oscillating coarse-splitting plate is provided on the back side of the oscillating rough-splitting plate, and the oscillating rough-splitting plate can maintain a constant compressive force. A hydraulic mechanism capable of retreating when a reaction force that overcomes the compression force is generated includes a hydraulic cylinder having a structure in which oil enters the rear chamber and air enters the front chamber, a slideable toggle block connected to the tip of the piston rod, and the toggle block. It consists of a toggle plate stretched between the lower back of the swing jaw, an air filter is provided in the front chamber of the hydraulic cylinder where air is taken in and out directly, a drain port is provided in the front chamber, and a peak stock is provided at the tip. The attached piping is connected, and a dust seal, an O-ring, and a back-up spring are incorporated between the piston rod and the rod cover.

(Embodiment) An embodiment of the hydraulic mechanism of the swing-type rough splitting machine of the present invention will be described with reference to FIGS. 1 to 3. FIG. The same reference numerals in FIG. 1 as in FIG. 4 indicate the same parts, and the main structure of the oscillating coarse splitter is the same as in FIG. 4. The hydraulic mechanism 14 includes two hydraulic cylinders 15 arranged in parallel, each having a structure in which oil enters the rear chamber and air enters the front chamber, a slideable toggle block 16 connected to the tip of each piston rod 15a, and the toggle block 16. It consists of a toggle plate 17 stretched between the lower back surface of the swing jaw 5 and the toggle plate 17. 18
is a toggle seat which abuts both the front and rear edges of the toggle plate 17, and the toggle seat 18 is fixed to the fixing block 5a on the lower back surface of the swing gear 5 and the toggle block 16, respectively. Dust covers 24 are attached to the upper surfaces of both front and rear ends of the toggle seat 18, respectively. A rod seat 25 is fitted and fixed on the distal end surface of the piston rod 15a of each hydraulic cylinder 15, and a bellows 26 is fitted between the outer periphery of the rod seat 25 and the distal end surface of the cylinder tube 15b of the hydraulic cylinder 15. It is overlaid. Arc-shaped horizontal concave surface 27 on the front surface of the rod seat 25
is formed, and this concave surface 27 is the toggle block 1.
The hydraulic pressure receiving rod 29 is disposed in a recess 28 formed on the rear surface of the cylinder 6. The toggle block 16 is slidably supported between a pedestal 30 provided on the casing 2 and a block holder 31. The part of the front chamber of each hydraulic cylinder 15 shown in FIG. 2 that directly takes in and out air, that is, the plug 32
An air filter 33 is provided. Further, a drain port 34 is provided on the lower side of the front chamber of each hydraulic cylinder 15, and a pipe 35 is connected to each drain port 34 as shown in FIG.
are gathered together in the middle and a peak stock 36 is attached to the tip. A dust seal 37, an O-ring 38, and a back-up ring 39 are installed between the piston rod 15a of each hydraulic cylinder 15 and the rod cover 15c installed in the cylinder tube 15b.
A wear ring 40 and a backup spring 39 are incorporated between the Each hydraulic cylinder 1
5 is a pedestal 30 and a cylinder holder 4 as shown in FIG.
1, and its position is adjustable. That is, the fixed frame 42 provided at the rear of the pedestal 30
and the rear end surface of the hydraulic cylinder 15.
is inserted, and an adjustment rod 44 that pushes the adjustment plate 43 is provided in the fixed frame 42, and the adjustment rod 44 is connected to the hydraulic ram 4.
5 allows it to advance and retreat. Therefore, the position of the hydraulic cylinder 15 can be adjusted by inserting an adjusting plate of appropriate thickness between the fixed frame 42 and the rear end surface of the hydraulic cylinder 15, driving the hydraulic ram 45, and moving the adjusting rod 44 forward and backward. Note that 46 in FIG. 2 is a passage for feeding pressure oil into the rear chamber of the hydraulic cylinder 15.

(Function) The function of the hydraulic mechanism of the swing type rough splitting machine of the embodiment configured as described above will be explained. A compressive force is applied to the lump furnace slag S input from the entrance 10 of the rough-splitting chamber 9 by the rocking movement of the oscillating coarse-splitting plate 3 in the rough-splitting chamber 9, and pressure is generated in the hydraulic cylinder 15 of the hydraulic mechanism 14. do. If the pressure of this hydraulic cylinder 15 is below the holding force of the hydraulic system, the lumpy slag is roughly split, and when the oscillating coarse splitting plate 3 moves away from the fixed coarse splitting plate 1, the coarsely split slag descends due to gravity. Rough splitting is again performed by the compressive force of the oscillating rough splitting plate 3 and the pressure of the hydraulic cylinder 15, and this process is repeated several times.
fall more.

When the block slag S is compressed, when a reaction force is generated in the block slag S that overcomes the compressive force of the rocking rough-splitting plate 3, the pressure oil in the hydraulic cylinder 15 returns to the hydraulic unit and is compressed by the holding force of the hydraulic system. While compressing the slag S, the rocking coarse dividing plate 3 retreats by the rocking stroke, and the gap W' of the outlet 13 widens. Therefore, the lumpy slag S falls due to its own weight, is again subjected to the compressive force of the rocking coarse splitting plate 3, is gradually deformed, or partially peeled off as the slag with a low iron content, and is discharged through the outlet 13 and falls.

Even when the hydraulic cylinder 15 of the hydraulic mechanism 14 is driven and the piston rod 15a moves back and forth during such rough splitting or deformation of the lumpy slag, the outer periphery of the piston rod 15a is covered by the bellows 26, and the piston rod 15a and the rod cover 15c are A dust seal 37, an O-ring 38, and a back-up spring 39 are installed in the gap between the piston rod 15a and the rod cover 15c. Never. Also, plug 3 in this front chamber
2 is provided with an air filter 33, so
Air taken in from the plug 32 is passed through the air filter 3
This plug 32 is passed through the furnace and becomes clean.
There is no possibility of furnace slag dust entering the front chamber. Furthermore, even if some of the oil in the rear chamber of the hydraulic cylinder 15 leaks into the front chamber through the gap between the piston 15d and the cylinder tube 15b, the drain port 34 is provided at the bottom of the front chamber. is not accumulated in the front chamber, and the pipe 3 is connected from the drain port 34.
It is discharged by opening the peak stock 36 through 5. Therefore, the furnace slag dust and oil never stick to the gap between the piston rod 15a and the rod cover 15c.

In this way, air can be taken in and out of the front chamber of the hydraulic cylinder 15 and oil can be leaked out of the rear chamber smoothly.
When the piston 15d moves forward, the air in the front chamber is not compressed, and the oil leaking from the rear chamber to the front chamber is not compressed, so the output of the hydraulic cylinder 15 is approximately equal to the rough fraction of the lumpy slag. Or it is consumed only for transformation and there is no waste. Further, since negative pressure is not generated in the front chamber when the piston 15d retreats, there is no need to apply more force than necessary.

(Effects of the Invention) As detailed above, the hydraulic mechanism of the swing-type rough splitter of the present invention prevents furnace slag dust from entering the front chamber of the hydraulic cylinder, and prevents oil in the rear chamber from leaking into the front chamber. This prevents the accumulation of air in the front chamber of the hydraulic cylinder and the leakage of oil from the rear chamber when the rocking rough dividing plate oscillates to coarsely divide or deform the lumpy slag. This prevents the air in the front chamber from being compressed when the piston moves forward, and the oil leaking from the rear chamber into the front chamber from being compressed, and the generation of negative pressure in the front chamber when the piston retreats. do not have. Therefore, it supports the force necessary to roughly crack or deform the lumpy furnace slag, and it also supports the force required to roughly crack or deform the lumpy furnace slag, and the outlet is adjusted according to the amount of rocking and the number of swings of the rocking rough-splitting plate for the large lumps of furnace slag that are not partially cracked. The operation of gradually widening the gap and peeling off small amounts or parts becomes smoother, and there is no excessive load on each part of the machine, which improves the functionality of the oscillating rough splitter and prevents damage. play.

[Brief explanation of the drawing]

1 is a longitudinal sectional side view of a rocking type coarse splitter equipped with the hydraulic mechanism of the present invention, 2 is an enlarged longitudinal sectional side view of a hydraulic cylinder in the hydraulic mechanism of the present invention, and 3 is a front view of the hydraulic cylinder. Vertical front view of the chamber, No. 4
The figure is a longitudinal cross-sectional view of a conventional rocking type coarse splitter equipped with a hydraulic mechanism, and FIG. 5 is a cross-sectional plan view taken along the line A--A in FIG. 4. 1... Fixed rough dividing plate, 3... Swinging rough dividing plate, 5...
Swing Jiyo, 9... Rough splitting room, 10... Entrance,
11...Mountain, 12...Valley, 13...Exit, 14...
...Hydraulic mechanism, 15...Hydraulic cylinder, 15a...
Piston rod, 15b...Cylinder tube,
15c...rod cover, 15d...piston,
16... Toggle block, 17... Toggle plate, 32... Plug, 33... Air filter, 34... Drain port, 35... Piping, 36
...Peako stock, 37...Dust seal, 38...
...O-ring, 39...Backup spring, W...
...Inlet gap, W′...Exit gap.

Claims (1)

[Claims] 1. The opposing surface shapes of the fixed rough-splitting plate and the oscillating rough-splitting plate that apply compressive force to the rough-splitting material are made into a wave shape with peaks and valleys facing each other in the width direction of the rough-splitting machine inlet, and The number of ridges on the surface of the rough dividing plate is 1 to 3, and the number of ridges on the surface of the other rough dividing plate is 2 to 4, so that a bending load is applied to the object to be roughly divided, and the outlet at the lower end of the rough dividing chamber The dimension between the opposing rough dividing plates is 1/5 of the dimension between the opposing rough dividing plates at the entrance of the upper end of the coarse dividing chamber.
In the oscillating rough-splitting machine made in ~2/5, the oscillating rough-splitting plate is provided on the back side of the oscillating rough-splitting plate, and the oscillating rough-splitting plate can maintain a constant compressive force and also has a countermeasure that overcomes the compressive force. The hydraulic mechanism that can retreat when a force is generated is a hydraulic cylinder that has a structure in which oil enters the rear chamber and air enters the front chamber.
It consists of a slideable toggle block connected to the tip of the piston rod, and a toggle plate stretched between the toggle block and the lower back surface of the swing jaw, and an air filter is installed in the part where air is directly taken in and out of the front chamber of the hydraulic cylinder. A drain port is provided in the front chamber, and a pipe with a peak stock attached to the tip is connected.
A hydraulic mechanism for an oscillating rough splitter, characterized in that a dust seal, an O-ring, and a back spring are incorporated between a piston and a rod cover and between a piston and a cylinder tube.