JP2015013235A - Slurry liquid classification/filtration method and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a classification/filtration method for a slurry liquid having rich behavior property, and enabling effective filtration work by eliminating the problems such as the accumulated storage of raw material in filtration means, and to provide a device therefor.SOLUTION: A slurry liquid classification/filtration device is provided with: a raw material transport mechanism 1 transporting raw material through two or more ducts; a filtration cylinder mechanism 3 supplying the raw material supplied in such a state as divided into two or more to a tubular path 6 which is formed by an outer cylinder member 4 and a tubular filtration member 5 disposed concentrically with the outer cylinder member 4; and inner and outer double scraper mechanisms 11, 18 slidingly contacting the outer surface of the tubular filtration member 5 rotating along the tubular path 6 and the inner surface of the outer cylinder member 4. The device is characterized by obtaining a filtered fluid including grains having a desired grain size or less by the tubular filtration member 5.

Description

  The present invention relates to a slurry filtration method and apparatus for extracting lithium and other noble metals from a mineral raw material slurry liquid and a high-quality filtrate having a high purity.

  In general, there are very few precious metals such as lithium existing in nature, and other rocks are extracted from mines such as lithium metal to extract precious metals such as lithium contained in soil.

  In addition, a production method for producing a high concentration lithium solution from a lithium-containing solution and further recovering lithium as lithium carbonate from the high concentration lithium solution is known (for example, see Patent Document 1).

  Furthermore, a classification filtration device using powder instead of liquid is also known (see, for example, Patent Document 2).

JP 2011-168461 A JP 2010-64049 A

  In any of the patent documents, the classification filtration configuration for a highly accurate viscous liquid with high behavior is insufficient and efficient classification filtration is impossible.

  In short, there is a problem that the raw material cannot be efficiently classified and filtered from a slurry having a high viscosity.

  The present invention has been made paying attention to the above points, and eliminates the problem of stagnation and retention of raw materials in the filtration means, and enables effective classification and filtration work. It is providing the filtration method and its apparatus.

  The present invention can solve the above problems by providing the following configuration.

  (1) A raw material transfer step in which a slurry liquid containing a noble metal is used as a raw material and is divided and transferred into two or more, and the raw material to be divided and supplied in the step is disposed concentrically with the outer cylinder member and the outer cylinder member. The filtration process step of filtering with a cylindrical filtration member, the outer surface of the cylindrical filtration member working in the filtration process step, the inner and outer double scraper treatment process sliding on the inner surface of the outer cylinder member, and the classification treatment A method for classifying and filtering slurry liquid, wherein the fluid to be filtered is obtained from a cylindrical filtering member.

  (2) A raw material transfer mechanism for transferring a raw material through two or more pipes, and a raw material supplied in two or more divided states are formed with a cylindrical filtration member arranged concentrically with an outer cylinder member A filtration cylinder body mechanism that supplies the cylindrical passage, an outer surface of the cylindrical filtration member that rotates along the tubular passage, and an inner / outer double scraper mechanism that is in sliding contact with the inner surface of the outer cylinder member, A slurry liquid classification and filtration device, wherein a fluid to be filtered having a particle size equal to or smaller than a desired particle size is obtained from the cylindrical filtration member.

  (3) The inner scraper mechanism of the inner / outer double scraper mechanism is provided with a scraper piece that works at an acute angle of not more than a right angle with respect to the cylindrical filter member and is centered on the axial direction of the cylindrical filter part, either forward or reverse The slurry liquid classification and filtration device according to (2), wherein the slurry liquid classification and filtration device is characterized in that it can be rotated in the direction of.

  (4) The filtering cylinder mechanism is provided with a coiled filtering hole, a triangular cross-section coil is fitted on the outer periphery of the frame cylinder, the acute angle side is engaged with the frame cylinder, and the bottom surface is exposed to the outside. The filtration apparatus for classifying slurry liquid according to (2), wherein the filtration hole is formed between adjacent triangular coils having a filtration surface as a smooth surface.

  (5) The slurry filtering apparatus according to (4) above, wherein the filtration width of the coiled filtration hole is 5 to 30 microns.

  According to the present invention, since the raw material of the slurry liquid rich in behavior is supplied separately, a large amount of filtration is possible even if it is viscous, and because of the scraper mechanism, in the flow of the filtered raw material in the filtration process Unnecessary stagnation and stagnation can be eliminated, and the filtration efficiency of viscous raw materials can be increased. And in the to-be-filtered liquid, the solid below the filtered particle size is contained, and it can classify | categorize with the solid content more than this particle size, and can filter accurately.

  Since the slurry stock solution with high consistency has a double internal and external scraper mechanism during the filtration process, it can always be processed efficiently without stagnation of the raw material, and the direction of rotation of the scraper mechanism even when clogged Can be changed in the reverse direction, so that there is an effect that the filtration process is not stagnated.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic sectional drawing which shows one Example of the slurry filtration classification apparatus which concerns on this invention, and shows a (circle) mark enlarged. FIG. 1 is a cross-sectional plan view of a raw material transfer mechanism showing the raw materials of the slurry liquid classification filtration apparatus shown in FIG. Sectional top view of the other raw material transfer mechanism which shows the raw material of the classification filter apparatus of the slurry liquid shown in FIG. 1 as four pipe lines IV-IV sectional view of FIG.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to examples.

  An embodiment of the present invention will be described below with reference to the drawings.

  1 is a raw material transfer mechanism that supplies a highly viscous slurry stock solution containing a high noble metal such as lithium, and includes a split pipe 2 divided into two or more, Thus, they are opened and connected to each other at opposite positions.

  FIG. 2 shows a case where the dividing tube 2 is configured to have two opposing positions with respect to the filtration cylinder mechanism 3, and FIG.

  The filtration cylinder mechanism 3 includes an outer cylinder member 4 and a cylindrical filtration member 5 disposed concentrically with the outer cylinder member 4, and the outer cylinder member 4 and the cylindrical filtration member 5 A cylindrical passage 6 is formed between them, and the raw slurry liquid having a high behavior flows through the cylindrical passage 6, and the fluid to be filtered that has been filtered by the cylindrical filtration member 5 passes through the cylindrical filtration member 5. And discharged from the discharge port 7.

  Here, the cylindrical filtration member 5 is configured so that a slit-like interval between adjacent coiled wires 9 mounted on the outer periphery of the cylindrical frame member 8 is filtered according to the size of the filtration hole P. The size of is regulated.

  Accordingly, the scraper piece 10, which is a blade having a smooth filtration surface with the filtration holes P and sliding in the tubular passage 6, smoothly and smoothly feeds the raw slurry liquid with a particle size suitable for the filtration holes P. The contained liquid can be filtered.

  The scraper mechanism 11 provided with the scraper piece 10 is fixed to the support rod 12 facing the inside of the circular tubular passage 6 with a retaining screw 13 to attach two or four support rods 12. The rotating shaft 15 provided on the supporting disc 14 is protruded on the central axis of the cylindrical filtration member 5 and connected to a gear mechanism 17 interlocked with the electric motor 16 so that the outer periphery of the cylindrical filtration member 5 is always in the positive direction. Or it can be rotated in the opposite direction.

  Further, the scraper piece 10 of the blade of the inner scraper mechanism 11 is fixed to an acute angle α such as 70 degrees or 40 degrees below the right angle with respect to the peripheral surface of the cylindrical filter member 5, and acts in a stepwise manner. Can achieve a kind of reverse effect.

  Further, reference numeral 18 denotes another outer scraper mechanism, which includes a scraper piece 19 of a blade that slidably rubs against the inner peripheral surface of the outer cylinder member 4. For example, as shown in FIG. Can be firmly fixed using screws 20.

  Therefore, the outer periphery of the cylindrical filtration member 5 and the inner peripheral surface of the outer cylinder member 4 of the circular passage 6 through which the behavioral raw material flows circulates by the action of the two types of inner and outer double scraper mechanisms 11 and 18. Can be rubbed at all times to completely prevent the material from accumulating and accumulating, and an effective filtering action can be performed.

  If the inner and outer double scraper mechanisms 11 and 18 are rotated in opposite directions, the scraper piece 10 clogs the outer surface of the cylindrical filter member 5 to remove coarse solid matter adhering thereto. Therefore, it is possible to smoothly perform the filtering action in the forward rotation direction after the dredging. In this case, the scraper piece 10 has an obtuse angle in the case of rotation in the reverse direction, and can effectively perform the clogging removal action.

  The size of the filter hole P is defined according to the size of the treated particles in the raw material slurry liquid. In the case of lithium, the size of the micron unit is 5 to 5 in consideration of the use as a battery raw material. A size of 30 microns is preferred.

  Furthermore, the cylindrical filtration member 5 is not slit-shaped, and can be implemented as a highly precise minute hole instead of a punching metal or the like.

  Reference numeral 21 denotes an outlet for the raw material after the classification process in which filtration containing particles of a size that is not filtered in the tubular passage 6 is excluded, and 22 is a small hole made in the disc 14, The gas component being transferred can be exhausted and effectively degassed from the exhaust cylinder 24 provided on the abutting plate 23 of the lid configuration. Reference numeral 25 denotes an annulus fixed to the lower end of the support rod 12. A resin lubrication ring or a bearing 26 interposed between the annulus 25 and the outer cylinder member 4 is disposed on the outer periphery of the disc 14. be able to. Reference numeral 27 denotes an abutting body that can support the other of the outer cylinder member 4. A shaft rod 28 is provided at the center, and each abutting body 27 is supported by a contact plate 29 that supports the cylindrical filter member 5. The shape can be retained by being engaged with the engaging portions 30. Reference numeral 31 denotes a gantry including a pulley 32, which can be moved.

  The operation will be described based on the above configuration.

  In order to accurately filter the size of the solid content in the slurry stock solution having behavior, a cylindrical filtration member 5 having a size suitable for the size of the filtration hole P is prepared in advance, and the slurry stock solution is supplied to the raw material transfer mechanism 1. Is divided into two or four divided pipes 2 that are divided and introduced into the filtration cylinder mechanism 3.

  The slurry stock solution supplied into the filtering cylinder mechanism 3 enters the tubular passage 6 and is filtered by the inner and outer double scraper mechanisms 11 and 18 while rotating in the tubular passage 6. With respect to the filtering member 5, the filtering surface is rubbed at an acute angle by the scraper piece 10 corresponding to the blade of the inner scraper mechanism 11, and a raw material containing particles that conform to the size of the filtering hole P circulates. It is filtered and taken out from the outlet 7, and particles larger than the size of the filtering hole P are excluded and taken out from the outlet 21.

  When a plurality of scraper pieces 10 are provided, the sliding contact angle with respect to the filtration surface is changed stepwise to 70 degrees and 40 degrees, so that the filtering action can be performed stepwise without difficulty. it can.

  Further, the slurry stock solution having a high behavior in the adsorbed and retained state is stripped off by the inner periphery of the outer cylinder member 4 and the scraper piece 19 of the outer scraper mechanism 18 that is rubbed, so that the filtration action can be efficiently performed. it can.

  Further, in the case of clogging, the scraper mechanism 11 can be rotated in the reverse direction, removed and removed easily for cleaning, and then rotated in the forward direction again to perform the filtering action.

  Therefore, the viscous slurry stock solution can be filtered without stagnation in the tubular passage 6.

  The cylindrical filtering member 5 is filtered by removing the shaft rod 28, loosening the contact body 27, and removing it from the receiving plate 29, thereby incorporating another member having a different size of the filtering hole P. The hole P can be changed to a different one.

DESCRIPTION OF SYMBOLS 1 Raw material transfer mechanism 2 Divided pipe 3 Filtration cylinder mechanism 4 Outer cylinder member 5 Cylindrical filtration member 6 Circular tubular passage 7 Discharge port 8 Frame member 9 Wire 10 Scraper piece 11 Scraper mechanism on the inside 12 Support rod 13 Stop screw 14 Disc DESCRIPTION OF SYMBOLS 15 Rotating shaft 16 Electric motor 17 Gear mechanism 18 Outer scraper mechanism 19 Scraper piece 20 Screw 21 Discharge port 22 Small hole 23 Contact plate 24 Exhaust cylinder 25 Ring body 26 Bearing 27 Contact body 28 Shaft 29 Reception plate 30 Engagement Part 31 Base 32 Pulley P Filtration hole α Sharp angle

Claims (5)

  A raw material transfer step in which a slurry liquid containing a noble metal is used as a raw material, and is divided and transferred into two or more, a cylindrical shape in which the raw material to be divided and supplied in the step is arranged concentrically with the outer cylinder member and the outer cylinder member Filtration treatment step for filtering with a filtration member, an outer surface of a cylindrical filtration member that works in the filtration treatment step, an inner and outer double scraper treatment step that slides on the inner surface of the outer cylinder member, and a classified fluid to be filtered Is obtained from a cylindrical filter member. A method for classifying and filtering a slurry liquid.   A circle formed by a raw material transfer mechanism for transferring a raw material through two or more pipelines, and a cylindrical filtration member arranged concentrically with an outer cylinder member for supplying the raw material supplied in two or more divided states The cylindrical structure includes a filtering cylinder mechanism that supplies the tubular passage, an outer surface of the cylindrical filtration member that rotates along the circular tubular passage, and an inner / outer double scraper mechanism that is in sliding contact with the inner surface of the outer cylinder member. A slurry liquid classification and filtration device, wherein a fluid to be filtered having a particle size equal to or smaller than a desired particle size is obtained from a filtration member.   The internal scraper mechanism of the inner and outer double scraper mechanism is provided with a scraper piece that works at an acute angle of not more than a right angle with respect to the cylindrical filter member, and is centered on the axial direction of the cylindrical filter part in either the forward or reverse direction. 3. The slurry liquid classification and filtration apparatus according to claim 2, wherein the apparatus is capable of rotating.   The filtering cylinder mechanism is provided with a coiled filtering hole, a triangular cross-section coil is mounted on the outer periphery of the frame cylinder, the acute angle side is engaged with the frame cylinder, the bottom surface faces outward, and the filtration surface is 3. The slurry filtering apparatus according to claim 2, wherein the filtering hole is formed between adjacent triangular coils as a smooth surface.   5. The slurry filtering apparatus according to claim 4, wherein a filtration width of the coiled filtration hole is 5 to 30 microns.

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