JPS6243743B2 - - 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 iron and steel manufacturing processes, which have a high iron content of 50 to 60% or more, and whose dimensions are 300%. 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 500 mm 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.

In the process of crushing furnace slag, the iron content is recovered as a concentrate for iron and steel making using magnetism. Efforts have also been made to grind ore using an autogenous grinding mill.

Incidentally, many furnace slags with a size of 300 mm or more and a high iron content are piled up untreated, and their disposal is outsourced to specialized companies and carried out by 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 specialized contractor 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. It was hot.

For these reasons, the applicant first proposed that the iron content was as high as 50 to 60%, and that the dimensions were 300%.
We have developed an oscillating type rough-splitting machine that can efficiently rough-split or deform large chunks of furnace slag of ~500 mm or more. (Japanese Patent Application No. 59-2320) The oscillating rough splitting machine will be explained with reference to FIGS. A swinging rough splitting plate inclined opposite to a fixed rough splitting plate, the swinging rough splitting plate 3
is fixed to a jaw 5 that swings back and forth while moving up and down with an eccentric shaft 4 as a fulcrum. Eccentric shaft 4
is integrated with its shaft end directly connected to the rotating shaft 6, and a V-pulley 7 is fixedly installed on the rotating shaft 6, and between this V-pulley 7 and a V-pulley on the output shaft of an electric motor (not shown). A V-belt 8 is mounted on the. 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 wave shape in which peaks 11 and valleys 12 face each other in the direction of radiation. 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 4.
It has been done.

The dimension between the fixed rough dividing plate 1 and the oscillating rough dividing plate 3 facing each other at the outlet 13 at the lower end of the rough dividing chamber 9 is the fixed rough dividing plate 1 facing each other at the entrance 10 at the upper end of the rough dividing chamber 9. 1/ of the dimension between 1 and the rocking coarse plate 3
5 to 2/5, and on the back side of the oscillating coarsely divided plate 3, the oscillating coarsely divided plate 3 can maintain a constant compressive force and can retreat when a reaction force that overcomes the compressive force is generated. A hydraulic mechanism 14 is provided.

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 slide block 16 attached to the tip of the piston rod of the hydraulic cylinder 15.
and a toggle plate 17 stretched between the swing jaw 5 and the lower back surface of the swing jaw 5. 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 lumpy furnace slag S having a length of 300 to 500 mm or more and having an iron content of 50 to 60% or more, which is introduced from the inlet 10 of the rough cracking chamber 9, undergoes an oscillating motion. The oscillating rough dividing plate 3 is pressed against the fixed rough dividing plate 1, and compressive force is applied repeatedly in the form of three-point bending as shown in FIG. Pressure is generated in the hydraulic cylinder 15. When the pressure of this hydraulic cylinder 15 is less than the holding force of the hydraulic system and the lump 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 broken by gravity. It descends and is again subjected to compressive force by the oscillating rough-splitting plate 3 to be roughly divided. This is repeated several times, and when the size becomes smaller than the normal gap W' at the outlet 13 of the coarse-splitting chamber 9, it is discharged from the outlet 13. 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 returns to the hydraulic unit, and the rocking rough splitting plate 3 retreats by the rocking stroke while compressing the block slag S by the holding force of the hydraulic system, and the gap W at the outlet 13 widens. . Therefore, the lumpy slag S falls due to 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 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.

By the way, when operating the above-mentioned oscillating coarse splitter,
The lumpy furnace slag S that has been reliably bitten into the rough-splitting chamber 9 is coarse-split as described above, or deformed as the oscillating rough-splitting plate 3 retreats by the amount of the oscillating stroke.
Depending on the shape and properties of the lumpy slag S, there are many cases in which the slag S is not reliably caught in the coarse cracking chamber 9 and escapes upward within the coarse cracking chamber 9. Even if the oscillating rough-splitting plate 3 is oscillated as it is, compressive force is not effectively applied to such a lumpy slag S, and a phenomenon occurs in which it remains in the rough-splitting chamber 9 for a long time. In such a case, the only option is to temporarily stop the operation and suspend the lumpy slag S above and discharge it, or use the hydraulic mechanism 14 to greatly expand the outlet dimension of the coarse cracking chamber 9 and discharge it downward. Therefore, there was a problem in that the operating time of the oscillating coarse splitter was 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 coarsely crack lump furnace slag without allowing it to remain in the rough-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 certain compressive force to the material to be coarse-split and rough-splitting it,
Even if there is no reaction force that overcomes the compressive force, the dimension between the opposing rough dividing plates at the outlet of the lower end of the coarse dividing chamber can be calculated as follows:
The feature is that the image is enlarged or reduced in stages at a rate of 1/10 to 1/5 of the initial setting value.

In the operating method of the oscillating rough splitting machine of the present invention, the outlet dimension at the lower end of the rough splitting chamber is set to 1/10 to 1/5 of the initial setting value.
The reason why the lumpy furnace slag is gradually expanded or contracted at the rate of To roughly split or transform furnace slag,
If it is less than 1/10, there will be little change in the contact position with the rough split plate, and the range of the smooth sliding surface will only be expanded.
If it exceeds 5, the contact position of the rough plate will change, but since the number of changes cannot be increased, it will take time to find the position where the lumpy slag escapes upwards and where it will definitely be caught. It takes too long, and as a result, the operation of the coarse splitter has to be temporarily stopped midway through.

Set the outlet dimension at the bottom end of the rough splitting chamber to 1/10 of the initial setting value.
By expanding or contracting in stages at a ratio of 1/5, the amount of change in the outlet dimension is approximately the same as the stroke amount of the oscillating coarse dividing plate, and when viewed from the coarse dividing plate side, it looks like a block of furnace slag. begin contact at completely different positions.

(Example) An example of the operating method of the rocking type coarse cracker of the present invention will be described. When lump S slag S with an iron content of 50 to 60% or more is input,
The oscillating rough dividing plate 3 is pressed against the stationary 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. 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 against the block slag S while applying a certain compressive force to the block slag S and performing rough splitting. , the dimensions of the opposing rough dividing plates 1 and 3 at the outlet 13 at the lower end of the rough dividing chamber 9, that is, the outlet gap W', are set to 1/10 of the initial setting value.
It expanded and contracted step by step at a rate of ~1/5, in this example a rate of 1/7.

As a result, the lumpy furnace slag S charged into the rough-splitting chamber 9 gradually expands the outlet gap W' and gradually descends downward until it comes into contact with the rough-splitting plates 1 and 3. As the position changes, it is firmly bitten by the coarse dividing plates 1 and 3, is roughly divided by the compressive force of the oscillating coarse dividing plate 3, and is discharged and falls from the outlet 13 of the coarse dividing chamber 9. did. Even with this operation, the contact position with the rough splitting plates 1 and 3 does not change, and therefore the lump S slag S that is not caught in the rough splitting plates 1 and 3 and escapes upward and is not coarsely split.
By reducing the exit gap W' in stages, the contact position with the coarsely divided plates 1 and 3 changes,
It was firmly caught between the coarse dividing plates 1 and 3, and was roughly divided by the compressive force of the swinging coarse dividing plate 3, and discharged and dropped from the outlet 13 of the coarse dividing chamber 9.

Thus, the iron content is 50 for dimensions over 300-500 mm.
~60% of the lumpy slag S is continuously and efficiently coarsely cracked without stopping the operation of the coarse crusher.
The size is 300 to 500 mm or less, and the iron content is
increased to over 90%.

(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 the initial setting value.
Since it expands and contracts in stages at a rate of 1/10 to 1/5, the contact position of the lumpy furnace slag with the coarsely divided plates changes, and the solid waste is reliably spread between the opposing coarsely divided plates. It is bitten and receives the compressive force of the swinging coarse dividing plate, so that it is reliably coarsely divided and does not remain in the coarse dividing chamber. Therefore, without stopping the operation of the oscillating rough splitter,
Blocked furnace slag can be coarsely split continuously and efficiently, making it suitable for iron manufacturing,
This has the effect of significantly improving the recovery efficiency of steelmaking concentrate.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of the rocking type rough splitter, and FIG. 2 is a cross-sectional plan view taken along the line A--A. 1... fixed coarse plate, 2... casing, 3...
Rocking coarse plate, 4... Eccentric shaft, 5... Jyo, 6...
...Rotating shaft, 7...V pulley, 8...V belt, 9
...Rough splitting room, 10...Entrance, 11...Mountain, 12...
...Valley, 13...Exit, 14...Hydraulic mechanism, 15...
...Hydraulic cylinder, 16...Slide block,
17... Toggle plate, 18... Glue sheet, 20... Sliding rod, 21... Base, 22... Spring holder, 23... Spring, S... Block furnace slag, W
...Inlet gap, W'...Exit gap.

Claims (1)

[Claims] 1 The surface shape of the fixed rough-splitting plate and the oscillating rough-splitting plate that apply compressive force to the material to be rough-split is made into a wavy shape with peaks and valleys facing each other in the width direction, and the rough-splitting plate formed between these two rough-splitting plates is The dimension between the opposing coarse dividing plates at the outlet of the lower end of the chamber 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 oscillating coarse dividing plate is For the operation of a rocking rough splitting machine, there is a hydraulic mechanism on the back side that allows the swinging 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, the gap between the opposing rough splitting plates at the outlet of the lower end of the rough splitting chamber Set the dimensions to 1/10 of the initial setting value.
A method of operating an oscillating rough splitter that is characterized by stepwise expansion and contraction at a rate of 1/5.