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WO2018173376A1 - Dispositif de régénération de liquide de meulage et procédé de régénération de liquide de meulage - Google Patents

Dispositif de régénération de liquide de meulage et procédé de régénération de liquide de meulage Download PDF

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Publication number
WO2018173376A1
WO2018173376A1 PCT/JP2017/043460 JP2017043460W WO2018173376A1 WO 2018173376 A1 WO2018173376 A1 WO 2018173376A1 JP 2017043460 W JP2017043460 W JP 2017043460W WO 2018173376 A1 WO2018173376 A1 WO 2018173376A1
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Prior art keywords
grinding
grinding fluid
filtration membrane
fluid
membrane
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PCT/JP2017/043460
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English (en)
Japanese (ja)
Inventor
岳 松本
池田　啓一
森田　徹
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Sumitomo Electric Industries Ltd
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Sumitomo Electric Industries Ltd
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Priority to JP2019506936A priority Critical patent/JP7003986B2/ja
Priority to CN201780088519.1A priority patent/CN110461544A/zh
Publication of WO2018173376A1 publication Critical patent/WO2018173376A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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  • the present invention relates to a grinding fluid recycling apparatus and a grinding fluid recycling method.
  • This application claims priority based on Japanese Patent Application No. 2017-057082 filed on Mar. 23, 2017, and incorporates all the content described in the above Japanese application.
  • a grinding machine such as a wire saw is widely used to cut a workpiece such as a metal body. Further, when the workpiece is cut by this grinding machine, a dispersion liquid in which abrasive grains are dispersed in the grinding liquid is often used. This dispersion liquid improves the lubricity between the grinding machine and the workpiece and suppresses the generation of frictional heat at the contact portion of the grinding machine, thereby suppressing breakage, thermal deformation, and the like of the grinding machine.
  • a grinding fluid regenerating apparatus is a used grinding liquid regenerating apparatus including grinding scraps, a storage tank storing the used grinding liquid, and a used storage stored in the storage tank.
  • a membrane separation module having a filtration membrane for separating the grinding waste from the grinding fluid, and an average pore diameter of the filtration membrane is 1.0 ⁇ m or more and 10.0 ⁇ m or less.
  • the method for regenerating a grinding fluid is a method for regenerating a used grinding fluid containing grinding waste, and includes a membrane separation step of separating the grinding waste from the used grinding fluid by a filtration membrane,
  • the filtration membrane has an average pore size of 1.0 ⁇ m or more and 10.0 ⁇ m or less.
  • the method for reusing used grinding fluid described in the above publication first collects the abrasive grains by centrifuging the used grinding fluid containing abrasive grains, dispersion liquid and chips, and then recovers the abrasive grains.
  • the used grinding fluid is centrifuged at high speed to separate the chips, and the used grinding fluid from which the chips are separated is separated into a film to collect the grinding fluid.
  • this method of reusing the grinding fluid requires a three-stage separation process in order to regenerate the grinding fluid, and the process is complicated and takes time to regenerate the grinding fluid.
  • this grinding liquid reuse method is a method in which membrane separation is performed after centrifugation in two stages, and the pore diameter of the membrane used for this membrane separation is set to 0.01 ⁇ m or more and 1 ⁇ m or less. Therefore, according to this recycling method of the grinding fluid, the permeation flux (flux) of the grinding fluid is lowered, and the regeneration efficiency of the grinding fluid cannot be sufficiently increased.
  • the present invention has been made based on such circumstances, and an object of the present invention is to provide a grinding fluid regenerating apparatus and a grinding fluid regenerating method capable of easily and efficiently regenerating a used grinding fluid.
  • the grinding fluid recycling apparatus and grinding fluid recycling method of the present invention can easily and efficiently regenerate used grinding fluid.
  • a grinding fluid regenerating apparatus is a used grinding liquid regenerating apparatus including grinding scraps, a storage tank storing the used grinding liquid, and a used storage stored in the storage tank.
  • a membrane separation module having a filtration membrane for separating the grinding waste from the grinding fluid, and an average pore diameter of the filtration membrane is 1.0 ⁇ m or more and 10.0 ⁇ m or less.
  • the grinding fluid recycling apparatus can selectively and efficiently separate the grinding waste from the used grinding fluid. it can. Therefore, the grinding fluid recycling apparatus can easily and efficiently regenerate the used grinding fluid.
  • a flocculant addition mechanism for adding a flocculant to the used grinding fluid stored in the storage tank may be further provided.
  • a flocculant addition mechanism for adding a flocculant to the used grinding fluid stored in the storage tank it is possible to agglomerate the grinding waste by the flocculant, Transmission can be more reliably suppressed. Therefore, the used grinding fluid can be regenerated more easily and reliably.
  • the main component of the filtration membrane is preferably polytetrafluoroethylene (PTFE). Since the filtration membrane has a three-dimensional network structure because the main component of the filtration membrane is PTFE, the grinding waste can be effectively separated, and the holes are not easily closed by the grinding waste. In addition, since the filtration membrane has a three-dimensional network structure, the separation function of the grinding dust is unlikely to be lowered even if the filtration membrane is somewhat worn. Furthermore, since the main component of the filtration membrane is PTFE, resistance to sodium hydroxide and the like is increased as compared with other organic membranes, so that a relatively inexpensive and highly durable filtration membrane can be formed.
  • PTFE polytetrafluoroethylene
  • a method for regenerating a grinding fluid is a method for regenerating a used grinding fluid containing grinding scraps, wherein the grinding scraps are separated from the used grinding fluid by a filtration membrane.
  • the filtration membrane has an average pore size of 1.0 ⁇ m or more and 10.0 ⁇ m or less.
  • the grinding fluid regeneration method can selectively and efficiently separate the grinding waste from the used grinding fluid. it can. Therefore, the method for regenerating the grinding fluid can easily and efficiently regenerate the used grinding fluid.
  • grinding waste refers to impurities mixed during grinding.
  • Average pore diameter refers to the average value of pore diameters when converted into a perfect circle of equal area.
  • Main component refers to a component having the largest content, for example, a component having a content of 50% by mass or more.
  • a regenerating apparatus 1 for grinding fluid (hereinafter, also simply referred to as “regenerating apparatus 1”) in FIG. 1 is a regenerating apparatus for used grinding fluid X containing grinding waste.
  • the regenerator 1 is a film having a storage tank (grinding liquid storage tank 2) for storing used grinding fluid X and a filtration membrane for separating grinding waste from the used grinding fluid X stored in the grinding fluid storage tank 2.
  • a separation module 3 In the regenerator 1, the average pore diameter of the filtration membrane is 1.0 ⁇ m or more and 10.0 ⁇ m or less.
  • the regeneration apparatus 1 uses the grinding waste discharge tank 4 from which the grinding waste A separated by the membrane separation module 3 is discharged, and the used grinding fluid X discharged from the grinding fluid storage tank 2 as the membrane separation module 3. And a pump 5 for pumping to the head.
  • the regenerator 1 can selectively and efficiently separate grinding waste from the used grinding fluid X because the average pore size of the filtration membrane provided in the membrane separation module 3 is 1.0 ⁇ m or more and 10.0 ⁇ m or less. it can. Moreover, in the said reproducing
  • abrasive grains and chips are separated from a used grinding liquid by a centrifuge, and then the grinding liquid is permeated through a ceramic film having a pore diameter of 0.01 ⁇ m or more and 1 ⁇ m or less. Collected.
  • the grinding waste and abrasive grains are separated from the used grinding fluid X by a filtration membrane having an average pore diameter of 1.0 ⁇ m or more and 10.0 ⁇ m or less, so that the abrasive is ground by a centrifuge. Even if the grains and relatively large grinding scraps are not separated in advance, the content of valuable components contained in the grinding fluid after membrane separation can be maintained substantially equal to the grinding fluid before use. Therefore, the grinding fluid recycling apparatus can easily and efficiently regenerate the used grinding fluid.
  • the grinding fluid (grinding fluid before use) is used to increase the lubricity of the grinding machine and the workpiece when the workpiece such as a metal body is cut by a grinding machine such as a wire saw.
  • the type of the above-mentioned grinding fluid is not particularly limited.
  • an emulsion system that contains a mineral oil, animal or vegetable oil, a surfactant (anionic, cationic, or nonionic) in water and has a milky white appearance, Contains a soluble, kerosene or other solubilized oil that contains a surfactant, water-soluble component, mineral oil, animal or vegetable oil, etc., or an extreme pressure additive such as sulfur or chlorine.
  • An oil base system in which is mixed.
  • an emulsion system is preferable as the grinding fluid regenerated by the regenerating apparatus 1.
  • the regenerator 1 can easily maintain the content ratio of valuable components of the grinding fluid to the same level as before use.
  • a content rate of the oil with respect to 100 mass parts of water in the said emulsion type grinding fluid it can be set as 5 to 15 mass parts, for example.
  • This grinding liquid is usually used in a state where abrasive grains are dispersed.
  • the average particle diameter of the abrasive grains is generally about 10 ⁇ m to 50 ⁇ m.
  • the grinding fluid storage tank 2 stores the used grinding fluid X.
  • the used grinding fluid X is supplied to the contact portion between the grinding machine and the object to be processed at the time of grinding, so that grinding waste such as floating oil, lubricating oil, cutting powder, friction powder, and microorganisms are mixed in.
  • the grinding fluid reservoir 2 is configured such that, for example, the used grinding fluid X used during grinding is stored through the discharge pipe 6 as needed.
  • the membrane separation module 3 is supplied with the used grinding fluid X stored in the grinding fluid storage tank 2 and pumped by the pump 5.
  • the membrane separation module 3 is an external pressure type dead-end membrane separation module having a filtration membrane.
  • the membrane separation module 3 has a plurality of hollow fiber membranes, and is configured such that the used grinding fluid X is supplied to the outer peripheral surface side of these hollow fiber membranes.
  • the membrane separation module 3 prevents the permeation of grinding dust and abrasive grains having a predetermined particle diameter or more contained in the used grinding fluid X by increasing the pressure on the outer peripheral surface side of these hollow fiber membranes and a plurality of other components. Permeate the inside of the hollow fiber membrane of the book.
  • the filtrate that has permeated into the plurality of hollow fiber membranes is discharged out of the system as reclaimed grinding fluid Y, and is reused during grinding. That is, it is preferable that the reproducing apparatus 1 separates the grinding waste from the grinding liquid X only by the membrane separation module 3 and does not have other separation means such as a centrifuge.
  • the lower limit of the average pore diameter of the filtration membrane is 1.0 ⁇ m as described above, and more preferably 1.5 ⁇ m.
  • the upper limit of the average pore diameter of the filtration membrane is 10.0 ⁇ m as described above, more preferably 5.0 ⁇ m, and even more preferably 2.5 ⁇ m. If the average pore diameter is smaller than the lower limit, the valuable component may not be sufficiently permeated into the filtration membrane, or the permeation flux of the filtrate may be lowered and the regeneration efficiency of the regenerated grinding fluid Y may be insufficient. There is. On the other hand, when the average pore diameter exceeds the upper limit, it may be difficult to sufficiently separate the grinding scraps such as mineral oil, animal and vegetable oils, BOD (biological oxygen demand) and the like.
  • the pore diameters of the plurality of pores of the filtration membrane are uniform.
  • the upper limit of the coefficient of variation in the diameter of the plurality of holes is preferably 0.20, more preferably 0.10, and even more preferably 0.05. If the coefficient of variation exceeds the upper limit, valuable components may be unintentionally removed, and grinding scraps having a relatively large particle size may be mixed into the reclaimed grinding fluid Y. May be difficult to keep.
  • the lower limit of the variation coefficient of the hole diameter of the plurality of holes is not particularly limited, and may be set to 0.01, for example.
  • the “coefficient of variation of the hole diameters of the plurality of holes” refers to a value obtained by dividing the standard deviation of the hole diameters of 10 arbitrarily extracted holes by the average diameter.
  • the material of the filtration membrane is not particularly limited, and for example, synthetic resin, ceramic, or the like can be used.
  • synthetic resin include polyethylene, polypropylene, polyvinylidene fluoride, ethylene-vinyl alcohol copolymer, polyamide, polyimide, polyetherimide, polystyrene, polysulfone, polyvinyl alcohol, polyphenylene ether, polyphenylene sulfide, cellulose acetate, poly Examples thereof include thermoplastic resins such as acrylonitrile and PTFE.
  • PTFE which is excellent in mechanical strength, chemical resistance, heat resistance, weather resistance, non-flammability and the like and porous is preferable, and uniaxially or biaxially stretched PTFE is more. preferable. Since the filtration membrane has a three-dimensional network structure because the main component of the filtration membrane is PTFE, the grinding waste can be effectively separated, and the holes are not easily closed by the grinding waste. In addition, since the filtration membrane has a three-dimensional network structure, even if the filtration membrane is somewhat worn, the separation function of the grinding dust is unlikely to deteriorate.
  • the said filtration membrane is formed with a ceramic, while the cost required for formation of this filtration membrane becomes high, there exists a possibility that this filtration membrane may crack.
  • the main component of the filtration membrane is PTFE, a relatively inexpensive and highly durable filtration membrane can be formed.
  • the regenerator 1 as the used grinding liquid X is regenerated, grinding debris such as oil gradually adheres to the surface of the filtration membrane. These grinding scraps are easy to remove by washing with a strong alkaline aqueous solution such as an aqueous sodium hydroxide solution.
  • the main component of the filtration membrane is PTFE, resistance to sodium hydroxide and the like can be increased as compared with other organic membranes, and the lifetime of the filtration membrane and thus the regenerator 1 can be increased. Can be promoted.
  • the filtration membrane When the filtration membrane is a hollow fiber membrane containing PTFE as a main component, the filtration membrane can be formed by using, for example, a tube obtained by extruding PTFE.
  • the tube is preferably stretched at a stretching ratio of about 50% to 700% in the axial direction and about 5% to 100% in the circumferential direction.
  • the lower limit of the ratio of the stretching ratio in the axial direction to the stretching ratio in the circumferential direction of the tube is preferably 2, and more preferably 5.
  • the upper limit of the ratio is preferably 15, and more preferably 10.
  • the pores of the filtration membrane can be formed in an elongated shape, typically an ellipse, whose major axis is the axial direction of the hollow fiber membrane.
  • an elongated shape typically an ellipse, whose major axis is the axial direction of the hollow fiber membrane.
  • the tube can be obtained, for example, by blending a PTFE fine powder with a liquid lubricant such as naphtha and making it into a tube shape by extrusion molding or the like. Further, dimensional stability can be improved by holding and sintering the tube for several tens of seconds to several minutes in a heating furnace maintained at a temperature equal to or higher than the melting point of PTFE fine powder, for example, about 350 to 550 ° C. .
  • the lower limit of the porosity of the plurality of hollow fiber membranes is preferably 50%, more preferably 55%.
  • the upper limit of the porosity of the plurality of hollow fiber membranes is preferably 90%, more preferably 85%. If the porosity is less than the lower limit, the permeate flux of the filtrate may be lowered, and the regeneration efficiency of the used grinding fluid X may be insufficient. Conversely, if the porosity exceeds the upper limit, the mechanical strength of the plurality of hollow fiber membranes may be insufficient.
  • the porosity is the ratio of the total volume of the pores to the volume of the plurality of hollow fiber membranes, and the density of the plurality of hollow fiber membranes is measured according to ASTM-D-792. Can be sought.
  • the grinding waste discharge tank 4 communicates with the space on the outer peripheral surface side of the plurality of hollow fiber membranes of the membrane separation module 3. Grinding waste that has not permeated into the plurality of hollow fiber membranes of the membrane separation module 3 is discharged into the grinding waste discharge tank 4. In addition, abrasive grains contained in the used grinding liquid X are discharged into the grinding waste discharge tank 4. The grinding waste discharged to the grinding waste discharge tank 4 is discarded as industrial waste or the like as needed.
  • the said regeneration method is a regeneration method of the used grinding fluid X containing grinding waste.
  • the regeneration method includes a membrane separation step (S1) that separates the grinding waste from the used grinding fluid X with a filtration membrane.
  • the filtration membrane has an average pore size of 1.0 ⁇ m or more and 10.0 ⁇ m or less.
  • the average pore diameter of the filtration membrane used in the membrane separation step is 1.0 ⁇ m or more and 10.0 ⁇ m or less, the grinding waste can be selectively and efficiently separated from the used grinding fluid. Therefore, the method for regenerating the grinding fluid can easily and efficiently regenerate the used grinding fluid X.
  • S1 is performed by the membrane separation module 3 of FIG. Specifically, in S ⁇ b> 1, grinding waste and abrasive grains having a predetermined particle diameter or more are separated from the grinding liquid X stored in the grinding liquid storage tank 2 and pumped by the pump 5 by the filtration membrane. In S ⁇ b> 1, the filtrate that has permeated through the filtration membrane is discharged out of the system as the regenerated grinding fluid Y. On the other hand, in S ⁇ b> 1, the grinding waste A that has not passed through the filtration membrane is discharged to the grinding waste discharge tank 4.
  • the average permeation flux of the filtrate in S1 As an upper limit of the average permeation flux of the filtrate in S1, 7.0 m / D is preferable, and 5.0 m / D is preferable in terms of sufficiently capturing the grinding scraps contained in the used grinding fluid X by the filtration membrane. More preferred.
  • the lower limit of the average permeation flux is, for example, preferably 0.1 m / D and more preferably 0.4 m / D from the viewpoint of preventing the regeneration efficiency of the regenerated grinding fluid Y from becoming insufficient.
  • the “average permeation flux” means an average value of permeation flux when the grinding waste is separated from the used grinding fluid for 5 hours in a state where the grinding waste is not attached to the filtration membrane.
  • separates a grinding waste from the used grinding fluid X only by S1, and does not have other separation processes, such as a centrifugation process.
  • the regeneration method grinding debris such as oil gradually adheres to the surface of the filtration membrane and the like while the membrane separation process is continued in S1. Therefore, the regeneration method may include a cleaning process for cleaning the filtration membrane when S1 is stopped. Hereinafter, this cleaning process will be described.
  • the specific cleaning method in the cleaning step is not particularly limited as long as grinding debris adhering to the filtration membrane can be removed, but the cleaning step is a rice washing step for washing the filtration membrane. And an alkali washing step of washing the filtration membrane with an alkali after the rice bran washing step.
  • the filtration membrane is washed with hands.
  • the alkali washing step for example, the filtration membrane is alkali washed with a strong alkaline aqueous solution such as a sodium hydroxide aqueous solution.
  • the regeneration method when the filtration membrane is mainly composed of PTFE as described above, the filtration membrane can be easily washed.
  • the main component of the filtration membrane is PTFE, deterioration of the filtration membrane can be suppressed even when alkaline washing is performed using a strong alkaline aqueous solution such as a sodium hydroxide aqueous solution. Prolonging the life of the reproducing apparatus 1 can be promoted.
  • the regenerator 21 includes a grinding fluid reservoir 2 that stores a used grinding fluid X, and a membrane separation module 3 that includes a filtration membrane that separates grinding waste from the used grinding fluid X stored in the grinding fluid reservoir 2. Is provided.
  • the regenerator 21 uses the grinding waste discharge tank 4 from which the grinding waste A separated by the membrane separation module 3 is discharged, and the used grinding fluid X discharged from the grinding fluid storage tank 2 to the membrane separation module 3. And a pump 5 for feeding to the pump.
  • the regenerator 21 includes a flocculant addition mechanism 22 that adds the flocculant B to the used grinding fluid X stored in the grinding fluid reservoir 2.
  • the regenerator 21 has an average pore diameter of the filtration membrane of 1.0 ⁇ m or more and 10.0 ⁇ m or less. Since the grinding fluid storage tank 2, the membrane separation module 3, the grinding waste discharging tank 4 and the pump 5 in the regeneration device 21 are the same as those in the regeneration device 1 of FIG.
  • the flocculant addition mechanism 22 includes a supply pipe 22a for supplying the flocculant B to the grinding fluid reservoir 2, and a stirrer 22b for mixing the flocculant B supplied to the grinding fluid reservoir 2 with the used grinding fluid X.
  • the flocculant addition mechanism 22 flocks grinding debris, typically oil, contained in the used grinding fluid X.
  • the flocculant addition mechanism 22 flocks the grinding scraps contained in the used grinding fluid X so that the particle diameter becomes larger than the pore diameter of the filtration membrane.
  • the flocculant B is not particularly limited as long as the grinding waste contained in the used grinding fluid X can be agglomerated, and examples thereof include known flocculants such as inorganic flocculants and polymer flocculants.
  • the inorganic flocculant include aluminum salts such as aluminum sulfate and polyaluminum chloride, and iron salts such as ferric chloride, ferrous sulfide, polyferric sulfate, and iron-silica inorganic polymer.
  • the polymer flocculant include cationic polymers, anionic polymers, and nonionic polymers.
  • Examples of the cationic polymer include polydimethylaminoethyl (meth) acrylate, polydiethylaminoethyl (meth) acrylate, polydimethylaminopropyl (meth) acrylamide, polydimethylaminopropyl (meth) acrylamide, polyallyldimethylamine, and these. Neutralized salts, quaternary salts and the like can be mentioned.
  • Examples of the anionic polymer include poly (meth) acrylic acid, polymaleic acid, polyitaconic acid and salts thereof.
  • Examples of the nonionic polymer include poly (meth) acrylamide, polyN-isopropylacrylamide, polyN, N-dimethyl (meth) acrylamide and the like.
  • the regenerator 21 includes the flocculant addition mechanism 22, the grinding waste can be aggregated by the flocculant B, and the permeation of the grinding waste through the filtration membrane can be more reliably suppressed. Therefore, the said reproduction
  • the said regeneration method is a regeneration method of the used grinding fluid X containing grinding waste.
  • the regeneration method includes a membrane separation step (S1) for separating the grinding waste from the used grinding fluid X by a filtration membrane, and an agglomeration in which a flocculant B is added to the used grinding fluid X stored in the grinding fluid storage tank 2.
  • an agent addition step (S2) In the regeneration method, the filtration membrane has an average pore size of 1.0 ⁇ m or more and 10.0 ⁇ m or less.
  • the membrane separation step (S1) in the regeneration method is the same as the regeneration method of FIG.
  • the said regeneration method isolate
  • the said regeneration method may be equipped with the washing
  • S ⁇ b> 2 is performed by the flocculant addition mechanism 22.
  • the timing for performing S2 is not particularly limited.
  • S2 may be performed every time the used grinding fluid X is supplied to the grinding fluid reservoir 2.
  • the reproduction method performs S1 after S2.
  • the regeneration method performs S ⁇ b> 1 continuously or intermittently, and the concentration of the grinding waste in the filtrate obtained by S ⁇ b> 1, the grinding waste stored in the grinding fluid storage tank 2.
  • S2 may be performed when the density or the like becomes a predetermined value or more.
  • the regeneration method can aggregate the grinding waste contained in the used grinding liquid X by the said coagulant
  • the regeneration apparatus does not necessarily need to use a dead-end type membrane separation module, and can use, for example, a cross-flow type membrane separation module.
  • the filtration membrane is not necessarily a hollow fiber membrane, and may be a flat membrane, for example.
  • the regenerator can generate regenerated grinding fluid only by the membrane separation module, but as a grinding waste separation mechanism other than the membrane separation module, for example, remove floating oil in the grinding fluid reservoir. It is also possible to provide a mechanism for
  • the regenerator can be configured as a batch regenerator that repeatedly stores, for example, a certain amount of used grinding fluid in a grinding fluid reservoir and regenerates the entire amount of the grinding fluid.
  • the regenerating apparatus may be configured as a continuous regenerating apparatus that supplies the used grinding fluid continuously or intermittently to the grinding fluid storage tank and separates the grinding waste by the filtration membrane in parallel with the supply. Is possible.
  • a regenerated grinding fluid was generated from a used emulsion-based grinding fluid containing grinding scraps by a grinding fluid regenerating method using the regenerating apparatus 1 of FIG.
  • the components of the grinding fluid before use were measured and found to be 5800 ppm mineral oil, 7100 ppm animal and vegetable oil, and 15,000 ppm BOD. Moreover, when the component of the grinding fluid after use was measured, they were 40000 ppm mineral oil, 42000 ppm animal and vegetable oil, and 62,000 ppm BOD.
  • the membrane separation module 3 of the regenerator 1 has three hollow fiber membranes, the total membrane area of these hollow fiber membranes is 1.05 m 2 , and the average pore diameter of the plurality of hollow fiber membranes is 2 Those having a thickness of 0.0 ⁇ m were used.
  • the above-mentioned used grinding fluid 20L was stored in the grinding fluid reservoir 2, and the entire amount of this used grinding fluid was pumped to the membrane separation module 3 by the pump 5 to separate the grinding debris.
  • the filtration pressure in the membrane separation module 3 was 30 kPa.
  • the average permeation flux of the filtrate that passed through the plurality of hollow fiber membranes was 5.0 m / D. No.
  • the components of the reclaimed grinding fluid Y obtained by No. 1 were measured by a normal hexane extraction method, they were 9600 ppm mineral oil, 12000 ppm animal and vegetable oil, and 21,000 ppm BOD.
  • a regenerated grinding fluid was generated from a used grinding fluid containing grinding scraps by a grinding fluid regenerating method using an apparatus simulating the regenerating apparatus 21 of FIG. No. of used grinding fluid 1 was used.
  • the membrane separation module 3 no. 1 was used.
  • the hydrochloric acid was used as a pH adjuster, and the pH of the above-mentioned used grinding fluid was adjusted to 6.8.
  • a total of 20 L of the used grinding fluid was transferred to a plurality of containers simulating the grinding fluid storage tank 2, and these containers were installed in a jar tester.
  • Polyaluminum chloride as a flocculant was added to these containers at a concentration of 10 g / L.
  • sodium hydroxide was used as a pH adjuster, and the pH of the used grinding fluid after adding the flocculant was adjusted to 6.8.
  • the used grinding liquid after pH adjustment was stirred for 5 minutes at a stirring speed of 150 rpm, and further stirred for 10 minutes at a stirring speed of 50 rpm. Thereafter, the entire amount of the used grinding liquid after stirring was pumped to the membrane separation module 3 to separate grinding scraps.
  • the filtration pressure in the membrane separation module 3 is no. Same as 1.
  • the average permeation flux of the filtrate that passed through the plurality of hollow fiber membranes was 2.0 m / D. No.
  • the components of the reclaimed grinding liquid Y obtained by No. 2 were measured, they were 5600 ppm mineral oil, 5100 ppm animal and vegetable oil, and 14,000 ppm BOD.
  • the average pore diameter of the hollow fiber membrane is 3.0 ⁇ m and 5.0 ⁇ m. 3 and no. Also about 4, mineral oil, animal and vegetable oil, and BOD are all reduced compared with content after use. This is considered to be because the floating oil contained in the used grinding fluid can be effectively separated when the average pore diameter of the hollow fiber membrane is the above value.

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  • Auxiliary Devices For Machine Tools (AREA)

Abstract

La présente invention concerne un dispositif de régénération de liquide de meulage qui régénère le liquide de meulage usé contenant la poussière de meulage, ledit dispositif comprenant une cuve de stockage qui stocke le liquide de meulage usé, et un module de séparation à membrane qui présente une membrane de filtration pour séparer la poussière de meulage du liquide de meulage usé stocké dans la cuve de stockage, le diamètre moyen de trou de la membrane de filtration étant de 1,0 à 10,0 µm. L'invention concerne plus précisément un procédé de régénération de liquide de meulage pour régénérer le liquide de meulage usé contenant de la poussière de meulage, ledit procédé comprenant une étape de séparation à membrane pour séparer la poussière de meulage du liquide de meulage usé en utilisant une membrane de filtration, le diamètre moyen de trou de la membrane de filtration étant de 1,0 à 10,0 µm.
PCT/JP2017/043460 2017-03-23 2017-12-04 Dispositif de régénération de liquide de meulage et procédé de régénération de liquide de meulage Ceased WO2018173376A1 (fr)

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JP2019506936A JP7003986B2 (ja) 2017-03-23 2017-12-04 研削液の再生装置及び研削液の再生方法
CN201780088519.1A CN110461544A (zh) 2017-03-23 2017-12-04 磨削液的再生装置以及磨削液的再生方法

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001149760A (ja) * 1999-11-29 2001-06-05 Kuraray Co Ltd クーラントの使用方法
JP2001198823A (ja) * 2000-01-14 2001-07-24 Kurita Water Ind Ltd 研磨材の回収装置
JP2001347456A (ja) * 1999-05-27 2001-12-18 Sanyo Electric Co Ltd Ｃｍｐ排水の濾過方法
JP2008034827A (ja) * 2006-06-26 2008-02-14 Nippon Valqua Ind Ltd 化学的機械研磨材のリサイクル方法及びその装置
JP2015142902A (ja) * 2013-12-26 2015-08-06 住友電気工業株式会社 再生濾過モジュール、使用済みアルカリ脱脂液の再生装置及び使用済みアルカリ脱脂液の再生方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1610365B1 (fr) * 2003-03-18 2012-08-08 Nomura Micro Science Co., Ltd. Materiau de purification d'une suspension de purification de semi-conducteurs, module de purification d'une suspension de purification de semi-conducteurs et procede de fabrication d'une suspension de purification de semi-conducteurs
JPWO2008020507A1 (ja) * 2006-08-16 2010-01-07 旭硝子株式会社 研磨剤スラリー廃液からの研磨剤回収方法及び装置
JP2012521896A (ja) * 2009-03-25 2012-09-20 アプライド マテリアルズ インコーポレイテッド Ｃｍｐスラリの使用時点リサイクルシステム
DE102009044204A1 (de) * 2009-10-08 2011-04-28 Fab Service Gmbh Wiederaufbereitungsverfahren und Wiederaufbereitungsvorrichtung zur Wiederaufbereitung von Slurry-Abwasser aus einem Halbleiterbearbeitungs-prozess, insbesondere aus einem chemisch-mechanischen Polierprozess
JP6406010B2 (ja) * 2012-07-25 2018-10-17 コニカミノルタ株式会社 研磨材再生方法
JP5941995B2 (ja) * 2012-11-28 2016-06-29 株式会社クラレ クーラント再生方法、及びクーラント再生装置
CN203045492U (zh) * 2012-12-15 2013-07-10 焦作市科瑞斯达光电材料有限公司 一种led基板的研磨抛光系统
JP6137945B2 (ja) * 2013-06-04 2017-05-31 株式会社クラレ 使用済みシリコンクーラント処理装置及び使用済みシリコンクーラント処理方法
CN203471976U (zh) * 2013-07-22 2014-03-12 可乐丽股份有限公司 浆料再生装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001347456A (ja) * 1999-05-27 2001-12-18 Sanyo Electric Co Ltd Ｃｍｐ排水の濾過方法
JP2001149760A (ja) * 1999-11-29 2001-06-05 Kuraray Co Ltd クーラントの使用方法
JP2001198823A (ja) * 2000-01-14 2001-07-24 Kurita Water Ind Ltd 研磨材の回収装置
JP2008034827A (ja) * 2006-06-26 2008-02-14 Nippon Valqua Ind Ltd 化学的機械研磨材のリサイクル方法及びその装置
JP2015142902A (ja) * 2013-12-26 2015-08-06 住友電気工業株式会社 再生濾過モジュール、使用済みアルカリ脱脂液の再生装置及び使用済みアルカリ脱脂液の再生方法

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