JP4248305B2 - Briquette manufacturing method for iron metal processing scrap - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a briquette for reusing metal processing waste discharged by grinding or the like as a raw material for a blast furnace and a method for manufacturing the same.
[0002]
[Prior art]
Conventionally, the grinding chips generated by grinding are naturally dried to reduce the content of the grinding fluid to 20% by weight or less. Oil is impregnated with shot wrinkles generated by shot blasting and tooth cuttings generated by gear cutting. While adding 6 wt% or less of these, the mixing ratio was 2 (grinding chips): 1 (shot mill): 7 (tooth cutting chips), and mixed and stirred, and then press pressure was applied. A method of manufacturing briquettes is known (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-241854
[Problems to be solved by the invention]
However, in the briquette manufacturing method described in Japanese Patent Application Laid-Open No. 2002-241854 that mixes shot soot, the shot soot becomes a hindrance when extruding moisture by applying a press pressure. After briquetting, there is a problem that the drop strength is reduced and the required strength is varied, causing cracks.
[0005]
The present invention has been made in view of such problems of the conventional technology, and the object of the present invention is to satisfy the required strength by forming iron-based metal processing scraps such as grinding chips with energy saving. An object of the present invention is to provide a briquette and a manufacturing method thereof.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention according to claim 1 is a briquette formed by applying a press pressure to ferrous metal work scraps, wherein the weight percentage of the grinding chips is 10 wt% to 35 wt%.
[0007]
The invention according to claim 2 includes, in the briquette of ferrous metal processing scrap according to claim 1, any one of turning chips, gear cutting chips, and pressing scraps as a component other than the grinding chips. I did it.
[0008]
The invention according to claim 3 is a mixture of viscous water-containing grinding chips pulverized to a desired size and metal processing scraps such as gear cutting chips, and applying press pressure to the mixed material to produce iron-based metal processing. Form scrap briquettes.
[0009]
The invention according to claim 4 is the briquette manufacturing method for iron-based metal working scraps according to claim 3, wherein the content of the grinding fluid of the water-containing grinding chips is 20 wt% or more and 60 wt% or less.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a side view of a briquette manufacturing apparatus, FIG. 2 is a top view, FIG. 3 is a side view of a screw conveyor pulverizer, FIG. 4 is a front view of a holding plate, and FIG. FIG. 6, FIG. 6 is a schematic side view, FIG. 7 is a diagram for explaining the operation of the briquette manufacturing apparatus, FIG. 8 is a diagram showing the relationship between the mixing ratio of grinding chips and tooth cutting chips and drop strength, and FIG. FIG.
[0011]
The briquette of iron-based metal work scraps according to the present invention is molded at a blending ratio of 10 to 35% by weight of grinding chips and 90 to 65% by weight of cutting chips. As a component mix | blended with grinding | polishing cutting powder, any one of turning cutting powder and press waste other than a gear cutting cutting powder may be sufficient.
[0012]
Tooth cutting chips are metal scraps generated by processing hobbing machines, gear shapers, etc., and iron-based granular chips of about 1 to 4 mm, and the oil content is reduced to 6% by weight or less with a centrifuge. In recent years, the gear cutting process has been made dry, and gear cutting is performed without using cutting oil.
[0013]
The turning chips are metal scraps generated by processing such as lathe processing, drilling machines, and milling machines, and refer to continuous chips that are spiral or loosely linear. In addition, when the turning chips are in a long state, there is a case where trouble may be caused at the time of conveyance. Therefore, it is desirable to cut or pulverize to a desired length.
[0014]
Next, as shown in FIG. 1 and FIG. 2, the briquette manufacturing apparatus for ferrous metal work scraps has a certain amount of grinding chip hopper 1 and solidified grinding chips supplied from the grinding chip hopper 1. A screw conveyor pulverizer 2 to be crushed, a grinding crusher 3 to further pulverize the grinding chips carried by the screw conveyor pulverizer 2 to a desired size, a gear cutter hopper 4 and a gear cutter hopper A screw conveyor 5 that conveys the tooth cutting chips supplied from 4, and a conveyor conveyer 6 that conveys the grinding chips crushed by the grinding crusher 3 and the tooth cuttings conveyed by the screw conveyor 5. And the briquette B is manufactured by pressing the blended raw material supplied from the supply hopper 7 and the supply hopper 7 which stores the blended raw material of the grinding chips and the tooth cutting chips conveyed by the conveyor 6 It provided with a contraction press 8.
[0015]
In addition, 9 is a motor for driving the screw conveyor pulverizer 2, 10 is a motor for driving the screw conveyor 5, 11 is a control panel, and 12 is an infrared sensor for detecting the storage amount so that the supply hopper 7 does not overflow.
[0016]
As shown in FIG. 3, the screw conveyor pulverizer 2 is disposed in a guide member 21 communicating with the grinding chip hopper 1, and includes a screw having a key-shaped pulverization arm 22 at the tip and a conveyor fin 23 on the outer peripheral surface. It consists of a conveyor 24 and a pressing plate 25 fixed to the guide member 21 in the vicinity of the crushing arm 22.
[0017]
The guide member 21 is formed so as to cover the screw conveyor 24, forms an upper surface of an inlet 21a for receiving the solidified grinding chips supplied from the grinding chip hopper 1, and makes the solidified grinding chips to a certain size. An outlet 21 b is formed on the lower surface in the vicinity of the crushing arm 22 for crushing and carrying it out to the crushing and crushing machine 3.
[0018]
As shown in FIG. 4, the presser plate 25 is formed in an arc shape so that a predetermined gap is formed between the presser plate 25 and the conveyor fin 23 along the outer periphery of the screw conveyor 24 provided with the conveyor fin 23 on the outer peripheral surface. Has been. Reference numeral 26 denotes a guide plate that guides the grinding chips so as to enter between the screw conveyor 24 and the presser plate 25, and 27 denotes a bolt that fixes the presser plate 25 to the guide member 21.
[0019]
As shown in FIGS. 5 and 6, the crushing and crushing machine 3 includes an outer frame member 31 having an upper surface and a lower surface opened, and a plurality of columnar shapes fixed to the inner wall surfaces of the outer frame member 31 on the left and right sides at predetermined intervals. And a plurality of partition plates 33 disposed on the upper and lower inner wall surfaces of the outer frame member 31 and provided with a predetermined gap. A mesh-shaped metal member 34 is provided, and a reciprocating drive means 35 that reciprocates the mesh-shaped metal member 34 on the outer frame member 31 in the arrow A direction. The partition plate 33 is desirably arranged at the center of the pitch of the biting bar 32 as shown in FIG.
[0020]
The reciprocating drive means 35 includes four cam floors 36 provided on the front, rear, left and right outer wall surfaces of the outer frame member 31, and four guide rails 37 laid on a frame body (not shown) so as to sandwich the cam floors 36. The connecting rod 39 has one end connected to the outer wall surface of the outer frame member 31 and the other end connected to the edge of the crank portion 38, and a motor 40 that rotates the crank portion 38.
[0021]
The manufacturing method of the briquette of the iron-type metalworking waste based on this invention using the manufacturing apparatus of the briquette comprised as mentioned above is demonstrated.
First, the viscous water-containing grinding chips discharged in the grinding process are collected and collected by a dedicated cart or the like and put into the grinding chip hopper 1. The collected grinding chips are sponge-like sponge bodies containing 20 wt% to 60 wt% of a grinding liquid such as grinding water or grinding oil.
[0022]
On the other hand, the tooth cutting powder produced by the gear cutting process is collected and put into the tooth cutting powder hopper 4. When cutting oil is used, the oil content is reduced to 6% by weight or less by a centrifuge. At this time, the size of the tooth cutting powder is about 1 to 4 mm.
[0023]
When the viscous water-containing grinding chips supplied from the grinding chip hopper 1 are carried into the screw conveyor pulverizer 2, the screw conveyor 24 is driven to rotate by the motor 9 and the grinding chips are moved toward the outlet 21b. Transport. Then, the grinding chips solidified in the water-containing state enter between the screw conveyor 24 and the presser plate 25 by the action of the guide plate 26 and the presser plate 25, and further to a certain size by the crushing arm 22 that rotates together with the screw conveyor 24. It is crushed.
[0024]
The grinding chips W1 crushed to a certain size are thrown into the outer frame member 31 of the grinding crusher 3 as shown in FIG. Then, the outer frame member 31 provided with the plurality of biting bars 32 and the partition plate 33 reciprocates on the net-like metal member 34, so that each biting bar 32 removes the grinding chips W1 into the net-like metal. Press against member 34. Then, the grinding swarf W1 passes through the mesh-shaped metal member 34, is pulverized to at least the size of the mesh, and falls onto the transport conveyor 6.
[0025]
It was found that the size of the grinding chips W1 when mixed with the gear cutting chips W2 in the supply hopper 7 affects the strength of the briquette B. In order to increase the strength of the briquette B, it is desirable to pulverize the grinding chips W <b> 1 smaller and to uniformly disperse the briquette B in the briquette B. Further, even if the weight% of the grinding chips W1 is reduced, the grinding chips W1 that have passed through the metal member 34 are viscous, so that depending on the size, the grinding chips W1 may stick to each other in the briquette B. It is contained as a large lump, and that part becomes a cause of crack generation.
[0026]
Therefore, the size of the grinding chips W1 that have passed through the mesh-like metal member 34 is preferably 20 mm or less so that the grinding chips W1 are uniformly dispersed in the briquettes B and the strength is increased. The size of the grinding chips W1 charged into the supply hopper 7 can be arbitrarily set by appropriately selecting the size of the mesh of the metal member 34.
[0027]
On the other hand, the tooth cutting powder W <b> 2 supplied from the tooth cutting chip hopper 4 is transported by the screw conveyor 5 and falls onto the transport conveyor 6.
Then, the grinding chip W1 and the gear cutting powder W2 are blended on the conveyor 6 and are transported in the direction of the arrow C to the supply hopper 7 that stores the blended raw materials of the grinding chip W1 and the gear cutting powder W2. It is thrown.
[0028]
Here, the mixing ratio of the grinding chips W1 and the tooth cutting chips W2 is controlled by controlling the number of rotations of the motor 9 that drives the screw conveyor 24 and the number of rotations of the motor 10 that drives the screw conveyor 5. It can be arbitrarily set by adjusting the carry-out amount to the crushing and pulverizing machine 3 and the carry-out amount of the tooth cutting powder W2 to the conveyor 6.
That is, in consideration of the carry-out amount of grinding chips W1 per rotation of the screw conveyor 24 and the carry-out amount of gear cutting chips W2 per rotation of the screw conveyor 5, the motor 9 and The motor 10 may be operated synchronously.
[0029]
Next, the grinding chips W <b> 1 and the tooth cutting chips W <b> 2 are mixed by the supply hopper 7 and supplied to the compression press 8. When the blended raw material is compressed by the compression press 8, the water-containing grinding chip grinding liquid is discharged in the direction in which pressure is applied or in the opposite direction. At that time, the grinding liquid is discharged to the wall surface of the press die (not shown) through the tooth cutting powder as the aggregate.
[0030]
Then, after maintaining a certain pressing pressure for a predetermined time, the pressure receiving door (not shown) is opened, and the briquette B is pushed out of the press die by the piston (not shown). Further, when the piston moves forward to the end of the pressure receiving door, oil or moisture adhering to the wall surface of the press die is discharged downward through a drain groove (not shown).
Then, the formed briquette B is paid out and accommodated in the carriage 13.
[0031]
The briquette B manufactured by the above method does not generate cracks or cracks even when dropped from a height of 2 m, and satisfies the required strength. As shown in FIG. 8, in the case of briquette B formed by blending grinding chips and tooth cutting chips, in order to satisfy the required drop strength (standard 2 m or more), the grinding chips are about 35 wt% or less. You can see that.
[0032]
Moreover, in the briquette B of the iron-type metal processing waste which concerns on this invention, it shape | molded, without mixing a shot soot. This is because when shot wrinkles are mixed with grinding chips, if the shot wrinkles are biased to one side depending on the mixing method, cracks will occur, leading to a drop in briquette drop strength, resulting in variations in required strength. It was because it became clear.
[0033]
As shown in FIG. 9, cracks are generated when the grinding chips are 20% by weight, the tooth cuttings are 70% by weight, and the shot wrinkles are 10% by weight. That is, it can be seen that even when the grinding chips are 35% by weight or less, the drop strength is reduced by mixing 10% by weight of shot candy.
[0034]
On the other hand, when the grinding chips are 30% by weight and the tooth cuttings are 70% by weight, no cracks are generated. This is understood from the relationship between the blending ratio of the grinding chips and the tooth cutting chips and the drop strength shown in FIG. Further, when the grinding chips are 100% by weight, cracks are generated as can be seen from the drop strength shown in FIG.
[0035]
In addition, in embodiment regarding the manufacturing method of the briquette of the iron-type metalworking waste concerning this invention, although the case where a tooth cutting powder was mix | blended with a grinding chip was demonstrated, the turning chip instead of a tooth cutting chip Metal processing scraps such as press scraps can be used.
[0036]
【The invention's effect】
As described above, according to the invention according to claim 1 or 2, it is formed with energy saving using iron-based metal processing scraps such as grinding chips, and the required strength can be satisfied.
[0037]
According to the invention which concerns on Claim 3 or 4, even if it does not dry naturally, ferrous metal processing scraps, such as a viscous water-containing grinding chip, can be shape | molded by energy saving, and cost reduction is achieved.
[Brief description of the drawings]
[Fig. 1] Outline side view of briquette manufacturing device [Fig. 2] Outline top view of briquette manufacturing device [Fig. 3] Side view of screw conveyor pulverizer [Fig. 4] Front view of holding plate [Fig. [Fig. 6] Outline side view of grinding crusher [Fig. 7] Explanatory diagram of operation of briquette manufacturing equipment [Fig. 8] Diagram showing the relationship between blending ratio of grinding chips and gear chips and drop strength [Fig. 9] Perspective view of briquette [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Grinding chip hopper, 2 ... Screw conveyor pulverizer, 3 ... Grinding crusher, 4 ... Gear cutting hopper, 5, 24 ... Screw conveyor, 6 ... Conveyor, 7 ... Feeding hopper, 8 ... Compression press Machine.

Claims (1)

The grinding liquid containing 20 mass% or more to 60 mass%, desired and hydrous grinding chips viscous ground to size, mixed toothed cuttings, ferrous metals by adding pressing pressure to the mixing materials A method for producing briquettes of ferrous metalworking scraps, comprising forming briquettes of scraps.

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