JP4662197B2 - Method and apparatus for adjusting amount of coolant contained in grinding scrap or polishing scrap - Google Patents

Description

  The present invention collects grinding scraps or polishing scraps generated in a grinding or polishing processing line together with coolant, separates them into coolant and grinding scraps or polishing scraps, reuses the coolant, and solidifies the grinding scraps or polishing scraps. The present invention relates to a coolant and an apparatus for recovering coolant and grinding scrap or polishing scrap, and a method and an apparatus for adjusting the amount of coolant contained in grinding scrap or polishing scrap before press processing for solidifying grinding scrap or polishing scrap.

  Conventionally, grinding waste or polishing waste generated by grinding or polishing is removed from the processing position by a coolant (oil-based or water-based) supplied to the processing position. Such processed grinding scraps or polishing scraps and coolant are collected together and separated into coolant and grinding scraps or polishing scraps by a separation device such as a sedimentation tank or a filtration device, and the coolant from which the grinding scraps or polishing scraps are removed is processed again. To be supplied. However, grinding scraps or polishing scraps contain coolant and cannot be reused as they are and are discarded. Therefore, in the thing of patent document 1, the grinding | polishing waste or grinding | polishing waste containing coolant is thrown into a centrifuge, and coolant is collect | recovered, while reducing coolant content. Further, the grinding scraps or polishing scraps are stirred by a stirring device, foreign matter is separated, the coolant is discharged from the grinding scraps or polishing scraps by a press device, and further solidified into a disk-like briquette (pancake). The content is reduced, and briquettes are used to facilitate handling and bring them to the steelworks for reuse. . However, the thing of the patent document 1 is not considered about the amount of coolant containing the grinding scraps or polishing scraps before press affecting solidification conditions.

Therefore, in Patent Document 1, grinding scraps or polishing scraps with a contained coolant amount of 90% or more are filtered, etc. so that the contained coolant amount is approximately 50%, and is put into a hopper provided with a press. Then, the mixture is stirred and uniformed by a stirring device provided in the hopper, supplied to the primary press, pre-compressed, and the pre-compressed grinding waste or polishing waste is further compressed by the secondary press for solidification. The Courant content after solidification is about 5 to 10%. This machine is further automated by connecting a grinding line, a filtration device, and a press device together with a processing line and a conveying line. Moreover, a belt conveyor or a screw conveyor is used as a conveying device for grinding scraps or polishing scraps, and a stirring device is provided. (See Patent Documents 1, 2, and 3). Furthermore, in Patent Document 4, since the conditions before pressing largely change depending on the temperature around the press portion, or the amount of coolant (rate) contained in the grinding scraps or polishing scraps, measure the coolant content and temperature, It is disclosed that solidification is performed by giving a pressing pressure and speed of coolant-containing grinding waste or polishing waste in accordance with pressure and speed at the time of proper pressing based on measurement results measured in advance.
Japanese Utility Model Publication No. 61-879 Japanese Patent Laid-Open No. 2001-300786 JP-A-8-15579 JP 2003-019598 A

  However, as in Patent Document 4, in order to change the press pressure and speed in accordance with the coolant content and temperature, the pressure and speed conditions are measured in advance for various coolant contents and temperatures, There was a problem that a large amount of data had to be collected and verified. In addition, conditions vary greatly depending on whether the coolant is oily or water-based, and it takes a lot of labor to obtain data. Furthermore, there is a problem that solidification cannot be achieved by simply adjusting the pressure and speed for all conditions of a wide range of coolant content and temperature. In addition, when solidifying coolant-containing grinding scraps or polishing scraps, a stirrer is installed before the press device is added, and the coolant-containing grinding scraps or polishing scraps before pressing are agitated to homogenize components and discharge foreign matter. Thus, solidification is facilitated, but after all, complicated control in the press device is necessary, and simply by providing a stirring device, solidification cannot be performed simply.

  In view of the above-described problems and the like, the object of the present invention is that solidification is possible in a solidification device in accordance with the coolant content of coolant-containing grinding scraps or polishing scraps, with data collection and adjustment being simple and stable. It is an object of the present invention to provide a coolant adjustment method and apparatus for grinding scraps or polishing scraps. Another object of the present invention is to provide a method and an apparatus for adjusting coolant containing abrasive scraps or abrasive scraps that effectively use a stirrer to promote solidification.

  As a result of various experiments, the inventors of the present invention did not change the press speed and pressure according to the temperature and the coolant content, but were made uniform to some extent by a stirrer and contained a substantially constant coolant. It has been found that the coolant-containing grinding scraps or polishing scraps can be solidified stably with little variation by pressing with a pressing speed and pressure within a predetermined range. On the other hand, in the stirring device, in addition to the homogenization described above, the coolant is easily separated from the coolant-containing grinding waste or polishing waste by stirring, and is discharged out of the stirring device by evaporation or dropping, and the coolant-containing grinding waste or polishing waste I knew that the content would decrease. That is, if it stirs with a stirrer, the coolant content rate of coolant-containing grinding waste or polishing waste can be reduced. Conversely, in order to increase the coolant content, coolant may be supplied. Therefore, it has been found that the coolant content of the coolant-containing grinding scraps or polishing scraps can be adjusted by stirring and supplying the coolant.

With this knowledge, in the present invention, the coolant-containing grinding waste or polishing waste discharged in the grinding or polishing process is charged, the grinding waste or polishing waste is temporarily stored, and the stirring device capable of stirring, A hopper that is provided below the discharge port of the agitator and receives the grinding waste or polishing waste discharged from the discharge port; and the grinding waste or polishing waste discharged from an outlet provided below the hopper; And a pressing device that solidifies the grinding or polishing waste while compressing and discharging a small amount of coolant, and agitating the grinding waste or polishing waste with the stirring device. cooler by to promote uniform and coolant separator, and stirring by supplying coolant to the grinding dust or polishing debris in the stirring device by By increasing the content of bets, it has solved the problems described above by providing a method of adjusting the content coolant of grinding dust or polishing waste so as to adjust the content coolant of the grinding dust or polishing debris.

That is, homogenization and coolant separation are promoted by stirring the coolant-containing grinding or polishing waste with the stirring device , and the coolant is contained by supplying the coolant to the grinding waste or polishing waste in the stirring device and stirring. By increasing the amount, the amount of coolant contained in the grinding scraps or polishing scraps is adjusted. Furthermore, the stirring device, the hopper, and the pressing device are arranged in the lower order in order, and the amount of coolant is adjusted by the stirring device by using the solidifying device in which the stirring device and the pressing device are arranged as close as possible, and grinding scraps or polishing Since it sends to a press apparatus, without significantly changing the coolant content rate of solid waste, solidification can be performed stably and reliably.

  Although the coolant content varies depending on the press device, in the case of a simple press that is solidified in one continuous stroke at a constant or variable pressure and speed (preferably 1 to 15 mm / sec), the coolant content is 10 to 10 by weight. 30% is recommended. If the coolant content is less than 10%, the bonding force is weak and does not solidify even if it is squeezed. Further, if the coolant content exceeds 30%, the coolant flows together with the grinding scraps or polishing scraps and cannot be solidified. For example, when making dumplings with flour, if there is too little water, it will not harden with papasa, and if there is too much water it will not be able to harden with mud. In the experiments by the inventors, about 20 to 25% was the best. In view of this, the invention according to claim 2 is a method for adjusting the amount of coolant containing abrasive scraps or abrasive scraps, in which the amount of coolant containing abrasive scraps or abrasive scraps is adjusted to 10 to 30% by weight. In addition, what was carried out separately by the present inventors, etc., pre-compresses coolant-containing grinding waste or polishing waste at a low pressure (19.6 to 49 kN (2 to 5 tons), low speed (1 to 15 mm / sec) in one cylinder. Further, when solidifying by pressing at a high pressure of about 980 kN (100 tons), solidification is facilitated by pre-compression to make the coolant content 10-30%. Needless to say, the coolant content may be changed depending on the conditions on the press device side, such as adjustment at around 50%.

  A stirrer for performing this adjustment method includes a stirring tank into which coolant-containing grinding scraps or polishing scraps discharged by grinding or polishing as described in claim 3 are charged, and a stirring blade provided in the stirring tank And a discharge device for discharging the contained coolant separated from the grinding scraps or polishing scraps provided in the lower portion of the stirring tank, and a supply device for supplying the coolant, A spray port for spraying the coolant supplied from the supply device; and an on-off valve capable of supplying and stopping the coolant to the coolant spray port, and the coolant spray port is provided above the stirring device. What is necessary is just to adjust the content quantity of the coolant containing the grinding | polishing waste or grinding | polishing waste which was provided and enabled dispersion | distribution of the coolant in the said stirring tank. That is, if the on-off valve is opened and the coolant is sprayed and stirred in the stirring device, the coolant content increases, and if the on-off valve is closed and stirred, the coolant content decreases. The supply coolant may be supplied with a new one or may be diverted from the line, but the coolant that has already been separated and stored in the coolant receiver or the like may be recovered. Needless to say, the coolant to be supplied is oily and water-based, and the coolant is almost the same as the coolant-containing grinding waste or polishing waste such as additive components. The coolant supply device may use a pump, but may be a device in which a coolant tank is disposed above and sprayed by the weight of the coolant. Moreover, although it may operate manually, you may make it operate an on-off valve automatically by measuring coolant content in the stirring apparatus or the vicinity.

  In the present invention, the stirrer and the press unit are brought close to each other, the coolant content of the coolant-containing grinding scraps or polishing scraps is adjusted to a constant value with the stirrer, and sent to the press unit, and solidification is stably and reliably performed. Therefore, it is not necessary to collect a large amount of data or make difficult adjustments, and solidification is possible under simple and stable conditions. In addition, since the coolant content can be easily adjusted using a conventional stirring device, the stirring device is effectively used.

  Further, since the coolant content is adjusted to 10 to 30% by the stirring device, the speed and pressure of the press device may be constant and adjustment is easy (claim 2). Furthermore, since it is only necessary to provide a spray port and an opening / closing valve, automation is easy (Claim 3).

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partial cross-sectional front view of an agitation distribution apparatus as an embodiment of an agitation apparatus showing an embodiment of the present invention, FIG. 2 is a partial cross-sectional top view thereof, FIG. It is a three-dimensional view of the front-end | tip part. As shown in FIGS. 1, 2 and 3, the stirring / distributing device 40 includes a box-shaped upper part 41 and grinding scraps formed by a lower part 42 having a substantially semi-cylindrical inner wall surface 42 b arranged in parallel with the arc side 42 a facing downward. Alternatively, an agitation tank 41 'capable of storing polishing waste is provided. The agitation tank 41 ′ has a relatively large capacity so that it can be temporarily stored. An opening 43a is opened at the bottom of the lower part 42, and screw conveyors are respectively attached so as to be openings on the grinding conveyor or polishing scrap input side of the screw conveyor 43, respectively. Reference numeral 43m denotes an electric motor with a speed reducer for driving the screw. The grinding scraps or polishing scraps 14 accumulated at the bottom are discharged from the discharge port 47 on the discharge side 43 b of the screw conveyor 43. In particular, distribution opening 101 is provided in the upper portion 41, adjacent to a stirred distributor, coolant receiving 33 the coolant is stored, a pump 103 for sucking and discharging coolant stored in the receiving coolant-off valve 102 is provided, The coolant can be sprayed from the spraying port to one of the stirring tanks 41 '. The stirring / distributing device 40, the spout 101, and the like constitute an adjusting device 40 'for adjusting the amount of coolant containing grinding waste or polishing waste.

Two sets of agitating blades 44 are provided, the tip of which is rotatable about the central axis 42d of the substantially semi-cylindrical axis along the substantially semi-cylindrical inner wall surface. A motor 45 with a speed reducer is connected to the shaft 42d of the stirring blade, and can be rotated and stopped left and right independently. As shown in FIG. 4, the stirring blades 44 are narrow in width, and a plurality of rod-shaped blades having a plurality of holes 44a are attached radially. More specifically, the stirring blade 44 has a flat plate 44b in a box shape extending in the longitudinal direction without a bottom, and a flat rib 44c is welded to the inside to form a hole 44a. Moreover, adjacent blade | wings are arrange | positioned so that there may be no space | gap, and a lump may not remain in a grinding | polishing waste or a grinding | polishing waste between blades. Moreover, a rotating surface becomes a part for thickness of a flat plate, and it agitates a grinding | polishing waste or a grinding | polishing waste efficiently with little resistance. The blades 44 prevent adhesion between grinding scraps or polishing scraps, adherence to upper and lower inner walls, and occurrence of bridging phenomenon. Grinding scraps or polishing scraps fall smoothly from the opening 43a at the bottom, and the screw conveyor without any delay. 43 is discharged. Moreover, grinding waste or polishing waste and contained coolant are made uniform. Further, the coolant oozes out by stirring, but the oozed coolant flows downward. On the other hand, the coolant content of grinding waste or polishing waste can be increased by supplying coolant from the spray port 101. Further, the current value of the motor 45 with a speed reducer that drives the stirring blades can be detected, and when this current value becomes larger than a predetermined current, a grinding scrap or polishing scrap supply stop signal to the stirring distributor 40 is issued. Yes.

  Between the discharge port 47 and the opening 43a of the screw conveyor 43, a cylindrical section having a circular cross section and a substantially U-shaped cross section 43c having an upper surface opened are provided. The height from the screw shaft of the substantially U-shaped cross section to the upper surface 43d is 1.5 times or more the outer diameter of the screw, a lid 46 is provided on the upper surface, and the portions other than the discharge port 47 and the opening 43a are sealed. .

  Therefore, the grinding waste or polishing waste containing coolant is temporarily stored in the stirring tank 41 ′, and further, while promoting the exudation of the coolant or supplementing the coolant by spraying, the grinding waste or polishing waste is stored in the stirring tank 41 ′. By stirring with the stirring blade 44, the grinding scraps or polishing scraps and the coolant content are made uniform, and further divided into two at the lower part. At this time, if the stirring blades 44 are rotated from the lower side to the center side, the grinding scraps or polishing scraps are almost divided into two. When the rotation of one stirring blade is reversed, the grinding scrap or the polishing scrap is preferentially supplied to the reverse rotation. By detecting a full signal of grinding scraps or polishing scraps from the current value of the electric motor, it is prevented from being influenced by steam generated from the grinding scraps or polishing scraps. Grinding scraps or polishing scraps are discharged from the bottoms of the lower portions 42 and 42 to the hopper 48 from the opening 43a by the screw conveyor 43 through the discharge port 47 of the screw conveyor. In the screw conveyor 43, in addition to grinding scraps or polishing scraps, coolant that has oozed out in the stirring unit is also added to collect a relatively large amount of coolant, but inspection is performed by providing a lid 46 on the upper surface 43d of the substantially U-shaped section 43c. Even if the lid is opened for such reasons, the coolant is prevented from leaking out. In addition, this agitation / distribution device does not stop as many as possible and stops some of the recovery devices that collect grinding waste or polishing waste discharged from a concentrated coolant or processing line as described below. Even so, it is used so as not to stop the upstream processing line. For this reason, what has two tank 41 'and the stirring blade 44 was shown. However, it goes without saying that the present invention can be applied to a variety of stirring devices such as a conventional one, and a stirring blade shaft arranged in a vertical direction.

  Next, a description will be given of a coolant and grinding scrap or polishing scrap recovery device using the adjusting device 40 'for adjusting the amount of coolant containing grinding scraps or polishing scraps provided with such a stirring and distributing device. FIG. 5 is an overall system diagram of a coolant and grinding scrap or polishing scrap recovery device using the apparatus for adjusting the amount of coolant containing abrasive scraps or abrasive scraps according to the present invention, and FIG. 6 is a cross-sectional view of a distributor attached to the separation device. 7 and 7 are partial cross-sectional side views of the transport device. In FIG. 5, a clean tank 2 that is provided with a grinding processing line 1 composed of a plurality of grinding machines 11 and supplies coolant (grinding fluid) 12 to the grinding processing line using a pump or the like, and a grinding grinding processing line. A dirty tank 3 is provided in which coolant 13 containing grinding scraps or polishing scraps (grinding scraps) 13a is collected. Three separation devices 4, 5, and 6 are provided to which coolant 13 containing grinding waste or polishing waste is supplied from the dirty tank 3 by a pump. The separator is a magnetic separator type filtration tank, and the coolant 13 is separated into the grinding scraps or polishing scraps 14 and the coolant 12 by passing the coolant 13 through the magnet tank. The coolant 12 separated from the grinding scraps or polishing scraps is returned to the clean tank 2. In addition to the above-mentioned separators, various separators such as a precipitation-type magnetic separator filtration tank and a filtration type using a filter can be used.

  As shown in FIG. 6, the separation devices 4, 5, and 6 scrape the grinding scraps or polishing scraps 14 separated on the bottom plate 62 provided on the magnet separator 61, up the tank 64 by the conveyor 63. A tank discharge part 65 is provided above the tank 64 so that the scraped grinding scraps or polishing scraps 14 fall downward. Distributing devices 4a, 5a, 6a are provided below the discharge unit 65, one of the grinding scraps or polishing scraps is provided in the grinding scraps or polishing scrap boxes 4b, 5b, 6b, and the other is the screw conveyor 7. Each is selectively distributed to the conveying device 20. The grinding waste or polishing waste boxes 4b, 5b, and 6b are box-shaped containers having a general upper portion that can store grinding waste or polishing waste and can be moved by a forklift or the like. The distribution device is a damper type, and switches the tilting direction of the switching plate 67 by the pneumatic cylinder 66 to switch the discharge destination of the grinding waste or polishing waste. The screw conveyor or conveying device has a substantially U-shaped cross-section with an upper opening, and the grinding debris or polishing debris 14 is U of the screw conveyor 7 or conveying device (screw conveyor) 20 as shown by the solid line A in FIG. It is introduced from the upper openings 8 and 28 of the letter-shaped cross section. Further, in the case indicated by the dotted line B in FIG. 6, the grinding waste or polishing waste 14 is put into the grinding waste or polishing waste boxes 4b, 5b, 6b. The switching plate 67 is fixed to the position of the solid line by supplying air to the pneumatic cylinder 66. When air is released from the pneumatic cylinder, the switching plate 67 is moved to the dotted line position by the spring force of the spring 68. Even if stops, it will be on the safe side (dotted line side). In addition, a large number of fins 9 (FIG. 5) welded to one side of a plate-shaped iron plate are formed on the surface of the tanks of the separators 4, 5, 6 to lower the temperature of the coolant, and from the grinding scraps or polishing scraps. Reduce steam generation.

  As shown in FIG. 5, the screw conveyor 7 is installed horizontally below the discharge portion 65 of the separation devices 4 and 5, and grinding or polishing waste of the separation devices 4 and 5 is introduced and discharged from the outlet 7a of the screw conveyor. Is done. Further, grinding scraps or polishing scraps 14 are thrown into the conveying device 20 disposed below the outlet of the screw conveyor 7. As shown in FIG. 7, the transport device 20 includes a long casing 21, a screw 22 disposed in the longitudinal direction on the bottom side 21 a in the casing, and a drive provided at one end of the casing for driving the screw. The screw conveyor which consists of the part 23 and the cylindrical opening part 24 provided in the other end of the casing is used. The casing 21 is provided with a substantially U-shaped cross-sectional portion 25 whose upper surface is opened at the opening portion 28 so that an object to be conveyed can be put in, and a drain port 26 provided on the lower surface of the casing on one end side of the casing. . The drive unit 23 is an electric motor with a reduction gear, and the output shaft is connected to the screw shaft 22a. The cylindrical opening 24 has an opening cross-sectional area that gradually increases and a cross-sectional axis that is inclined upward. The conveying device 20 composed of such a screw conveyor is disposed in an obliquely upward direction so that the drain opening 26 is on the lower side and the cylindrical opening 24 is on the upper side. The installation angle θ of the transport device 20 is about 20 to 40 °. In the installed state, the cross-sectional axis is tilted upward so that the angle α is 5 to 20 ° larger than θ described above, and grinding scraps or polishing scraps are discharged from the cylindrical opening as indicated by an arrow 20a. ing.

  A coolant receiver 32 is placed under the drainage port to store the coolant 14 ′ that has oozed from the grinding scraps or polishing scraps 14 and to return the stored coolant to the separation device 6 by a pump or the like. . When the conveying device 20 is stopped due to an abnormality, a grinding scrap or polishing scrap supply stop signal is issued. By this signal, the distribution devices 4a, 5a and 6a remove the grinding scrap or polishing scrap into the grinding scrap or polishing scrap box. To be discharged to the side. In addition, when not all the grinding scraps or polishing scraps are discharged to the grinding scraps or the polishing scrap box but only the screw conveyor 7 is stopped due to an abnormality, the distribution devices 4a and 5a remove the grinding scraps or the polishing scraps into the grinding scraps. Or it discharges | emits to a grinding | polishing waste box, and the distribution apparatus 6a distributes to the conveying apparatus 20 as it is.

  As shown in FIG. 5, a belt conveyor 31 is provided below the cylindrical opening 24 of the transport device 20, and an agitation distribution device 40 is installed at the end of the belt conveyor with its upper portion 41 opened. The grinding scraps or polishing scraps 14 discharged from the are put into the stirring and distributing device. The belt conveyor 31 is appropriately arranged for adjusting the height between the apparatuses, the horizontal position, and the like. The amount of storage in the stirring and distributing device is the largest after the screw conveyor 7 and the conveying device 20. A hopper 48 is provided below the discharge port 47 of the screw conveyor 43 of the adjusting device 40 ′ (agitating and distributing device) for adjusting the amount of coolant containing abrasive waste or abrasive waste. Alternatively, polishing scraps are supplied. When the press device is stopped or the hopper 48 is full and there is a problem with the supply of grinding waste or polishing waste to the press device, a grinding scrap or polishing waste supply stop signal is issued, and the screw conveyor 43 is stopped.

  Two press devices 51 are arranged at the discharge port 49 of the hopper, one each. The pressing device 51 compresses the grinding waste or polishing waste 14 discharged from the discharge port 49 of the hopper 48 by pressing, and further solidifies the grinding waste or polishing waste into a pancake or briquette shape while discharging a small amount of coolant. The press apparatus itself may be various conventional press apparatuses as described in Patent Documents 1 and 2 described above, and the description thereof is omitted because it is not directly related to the present invention. The briquette 15 solidified by the press device 51 is discharged to a recovery conveyor 52 disposed between the press devices 51, and a flexible container pack 53 is placed at the end of the recovery conveyor. A counter is provided at the end of the collection conveyor to count the number of briquettes. When the predetermined number is reached, the collection conveyor is stopped and an expiration buzzer is issued. A collection device 54 is constituted by the collection conveyor 52 and the flexible container pack 53. The coolant exuded between the devices and between the devices is stored in the coolant 15 ′ receiver 33, and the coolant 15 ′ is stored in the stirring tank 41 ′ from the spray port 10 through the pump 103 and the on-off valve 102 described above. The surplus coolant is returned to the separation device 6 by another pump or the like.

  According to this configuration, the coolant 13 containing the grinding scraps or polishing scraps from the grinding line 1 through the dirty tank 3 is separated into the coolant 12 and the grinding scraps or polishing scraps 14 including the coolant by the separating devices 4, 5, 6. . In normal operation, each distribution device discharges grinding scraps or polishing scraps 14 to the respective screw conveyors 7 and the conveying device 20. The coolant content at this time is as high as 90%. The grinding scraps or polishing scraps discharged to the screw conveyor 7 are discharged to the transport device. The contained coolant 14 ′ oozes out from the grinding scraps or polishing scraps in the conveying device 20 and is discharged to the liquid discharge port 26. Since the screw conveyor 20 sends grinding scraps or polishing scraps upward while intermittently operating, the exuding coolant is efficiently discharged from the drain port 26. Further, while being compressed lightly by the cylindrical opening 24 inclined upward, the grinding waste or the polishing waste 14 is discharged while further exuding the coolant.

  The coolant content of the coolant content grinding waste or polishing waste 14 discharged from the conveying device (screw conveyor) 20 is about 40 to 60%. This coolant content grinding scrap or polishing scrap 14 is put into the adjusting device 40 ′ (stirring distribution device 40) for adjusting the coolant amount of grinding scrap or polishing scrap, temporarily stored while being stirred by the stirring distribution device 40, and further coolant. The exudation is promoted or the coolant is supplied, and the coolant content is adjusted to 20 to 25% and is made uniform. Further, the coolant content grinding scraps or polishing scraps 14 are divided into two and discharged to the hopper 48 from the discharge port 47 of the screw conveyor 43. An appropriate amount of grinding scraps or polishing scraps is supplied to the press device 51 from the discharge port 49 of the hopper 48 and is sequentially solidified (briquette). Since the stirring / distributing device and the pressing device are close to each other, the change in the coolant content adjusted by the stirring / distributing device is small. Moreover, since the coolant content rate of the coolant content grinding scraps or polishing scraps 14 before pressing is 20 to 25%, the grinding scraps or polishing scraps do not flow out together with the coolant, and do not become a bumper easily and stably. Solidification is possible.

  The solidified briquette 15 is collected by a collection conveyor 52 and is put into a flexible container pack 53. Grinding scraps or abrasive scrap briquettes are transported to a steel mill with a flexible container pack and recycled. The leaked coolants 14 ′ and 15 ′ are respectively stored in the coolant receivers 32 and 33 and returned to the separation device 6 by a pump or the like, and a part thereof is sprayed from the spraying port 101 to the stirring and distributing device. In such a recovery device, when there is a problem in the supply of grinding waste or polishing waste in the subsequent process, such as generating a supply stop signal for grinding waste or polishing waste (grinding waste or polishing waste) appropriately between the devices. The supply of grinding waste or polishing waste from the previous process is stopped, and finally the grinding waste or polishing waste 14 from the separation device is discharged to the grinding waste or polishing waste box 4b, 5b, 6b. Thus, the supply of the coolant 12 to the processing line 1 can be prevented from stopping.

It is a partial section front view of the adjustment device (stirring (distribution) device) of the amount of coolant containing grinding waste or polishing waste which shows an embodiment of the invention. It is a partial cross-sectional top view of the adjustment apparatus (stirring (distribution) apparatus) of the amount of coolant containing grinding | polishing waste or grinding | polishing waste which shows embodiment of this invention. It is a fragmentary sectional side view of the adjustment apparatus (stirring (distribution) apparatus) of the amount of coolant containing grinding | polishing waste or grinding | polishing waste which shows embodiment of this invention. It is a three-dimensional view of the tip part of the stirring blade of the adjusting device (stirring (distribution) device) for the amount of coolant containing grinding waste or polishing waste showing an embodiment of the present invention. It is the whole system figure of the recovery device of the coolant which uses the adjustment device (stirring (distribution) device) of the amount of coolant containing grinding waste or polishing waste of the present invention. FIG. 6 is a cross-sectional explanatory view of a distribution device provided in the separation device used in the coolant and grinding scrap or polishing scrap recovery device of FIG. 5. It is a fragmentary sectional side view of the conveyance apparatus used for the collection | recovery apparatus of the coolant of FIG. 5, and grinding waste or polishing waste.

Explanation of symbols

1 Processing line
14 Coolant-containing grinding or polishing waste
15 Solidified grinding or polishing waste
15 'Trace amount of coolant
40 Stirring (dispensing) device
40 'Adjustment device for amount of coolant contained in grinding or polishing waste
41 top
41 'stirring tank
47 Discharge port
48 hopper
51 Press machine
101 Spraying mouth
102 On-off valve
103 Supply device (pump)

Claims (3)

Coolant-containing grinding waste or polishing waste discharged by grinding or polishing processing is charged and the grinding waste or polishing waste is temporarily stored and stirred, and provided below the discharge port of the stirring device. A hopper that receives the grinding scraps or polishing scraps discharged from the discharge port, and the grinding scraps or polishing scraps discharged from an outlet provided below the hopper, and compresses and further discharges a small amount of coolant. However, in the solidification device for grinding waste or polishing waste, which has a press device for solidifying the grinding or polishing waste, the stirring device is used to stir the grinding waste or polishing waste to promote homogenization and coolant separation. It is allowed, and, by increasing the content of the coolant by stirring by supplying coolant to the grinding dust or polishing debris in the stirring device Grinding dust or regulating method for content coolant of polishing dust and adjusting the content coolant of the grinding dust or polishing debris.
  The method for adjusting the amount of coolant contained in grinding waste or polishing waste according to claim 1, wherein the amount of coolant contained in the grinding waste or polishing waste is adjusted to 10 to 30% by weight. Stirring tank into which coolant-containing grinding waste or polishing waste discharged by grinding or polishing processing is charged, stirring blades provided in the stirring tank, and grinding scraps provided in the lower part of the stirring tank. Alternatively, a stirring device including a discharge port for discharging the contained coolant separated from the polishing debris, a supply device for supplying the coolant, a spray port for spraying the coolant supplied from the supply device, and the coolant An on-off valve capable of supplying and stopping the coolant to the spraying port, and the coolant spraying port is provided in an upper part of the stirring device, and is capable of spraying the coolant into the stirring tank. A device for adjusting the amount of coolant contained in grinding scraps or polishing scraps.

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