JP2011025145A - Slurry feeder and medium mixing mill - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a slurry feeder solving problems of conventional slurry feeders and a medium mixing mill using it. <P>SOLUTION: The slurry feeder includes a reciprocating pump, the first diaphragm valve arranged on the suction side and the second diaphragm valve arranged on the discharge side of the reciprocating pump, the first driving means for driving the first diaphragm valve, the second driving means for driving the second diaphragm valve and a control means for operating the first and second diaphragm valves so as to interlock their operation with that of the reciprocating pump. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a slurry supply apparatus, and more particularly to a slurry supply apparatus incorporated in a media mixing mill.

  As a slurry supply apparatus, what was described in Unexamined-Japanese-Patent No. 2007-229845 etc. is known. The slurry supply apparatus described in Japanese Patent Application Laid-Open No. 2007-229845 is interposed in a slurry pressure supply source, a slurry supply line that guides the slurry pumped from the slurry pressure supply source to a use point, and a slurry supply line, A slurry pump that discharges the slurry sucked up from the slurry pumping source side to the point of use and a slurry pump suction port side in the slurry supply line, and when the slurry pump is in the slurry suction operation, the suction port is opened. Provided on the inlet side check valve that closes the inlet port during slurry discharge operation and the slurry pump outlet side in the slurry supply line, and closes the outlet port during slurry suction operation of the slurry pump, and slurry discharge operation of the slurry pump Sometimes the discharge side check valve that opens the discharge port and the slurry supply Having a throttle valve interposed in the downstream side of the discharge port side check valve in line, and a pressure reducing valve interposed in the upstream side of the suction port side check valve in the slurry feed line. The slurry pump of the slurry supply device is preferably a diaphragm pump.

JP 2007-229845 A

  However, the check valve used in this type of slurry supply apparatus, including the slurry supply apparatus disclosed in Japanese Patent Application Laid-Open No. 2007-229845, has a structure using a ball and a coil spring. If foreign matter is mixed in the slurry or the viscosity of the slurry is high, the clearance between the ball and the wall increases, and a malfunction often occurs because the spring does not function well.

  Moreover, in the slurry supply apparatus using the check valve as described above, it is difficult to remove the slurry remaining on the discharge-side check valve, and in order to remove the slurry in the pump, the entire pump is disassembled. It is necessary and involves a lot of work. An example of a slurry supply device using a conventional check valve is shown in FIG.

  An object of this invention is to provide the slurry supply apparatus which eliminated the trouble of the above conventional slurry supply apparatuses, and the media mixing type mill using this slurry supply apparatus.

(1) A reciprocating pump, a first diaphragm valve provided on the suction side of the reciprocating pump, a second diaphragm valve provided on the discharge side, a first driving means for driving the first diaphragm valve, Second driving means for driving the second diaphragm valve, and the first driving means and the second driving means to operate the first diaphragm valve and the second diaphragm valve in conjunction with the operation of the reciprocating pump. A slurry supply apparatus comprising a control means.
(2) The slurry supply apparatus according to (1), wherein the reciprocating pump is a diaphragm pump.
(3) The slurry supply apparatus according to (1) or (2), wherein the first driving means and the second driving means are electromagnetically driven.
(4) The slurry supply apparatus according to any one of (1) to (3), wherein the first driving means and the second driving means are fluid pressure driven.
(5) Any of the above (1) to (4), wherein the suction side and the discharge side can be reversed by setting the first diaphragm valve to the closed side and the first diaphragm valve to the open side during suction. A slurry feeder.
(6) A media mixing mill incorporating the slurry supply device according to any one of (1) to (5).
(7) A pulverization container having a raw material inlet and having a spherical pulverization chamber, an agitating member rotatably installed in the pulverization chamber and in the vicinity of the inner wall of the pulverization container, a pulverization medium placed in the pulverization chamber, and the media mixing mill (8) the stirring member of grinding the indoor and an and is provided with a centrifugal media separation member rotatably disposed to face the agitating member (6) is 5~40m The media-mixing mill according to any one of (6) and (8) above, which can be driven at a rotational speed in the range of / s.
(9) Any one of (6) to (8), characterized in that it is a saddle type, the stirring member is disposed below the crushing chamber, and the media separating member is disposed above the crushing chamber. The media mixing mill described in 1.
(10) The media separating member is fixed to one end, and includes a hollow media separating member drive shaft extending from the grinding chamber to the outside, and the inside of the media separating member drive shaft serves as a raw material outlet. The media mixing mill according to any one of (6) to (9) above.
(11) A media mixing mill that uses beads as a grinding media, comprising a screen separator for separating beads from a treated raw slurry, and the screen is formed of a foam metal plate having an open cell structure (6) Media mixing mill.
(12) A grinding container having a vertical cylindrical grinding chamber containing bead-shaped grinding media, a raw material slurry supply port provided in the grinding container, a lower part of the grinding chamber, In a media mixing mill having a stirring member having a substantially coaxial rotating shaft and a media separating member provided in the grinding chamber and above the stirring member, a lower portion of the grinding chamber is divided in a radial direction. The above-mentioned crushing chamber lower part outer part is provided with a guide ring that constitutes the lower part inner part of the grinding chamber and the outer part of the lower part of the annular grinding chamber, and the lower part outer part of the grinding chamber is used as the rising passage of the mixture of the grinding media and the raw slurry. 6) Media mixing mill.
(13) The media mixing mill according to (12), wherein the stirring member rotates at a peripheral speed of 5 to 30 m / s.
(14) The media mixing mill according to (12) or (13), wherein the total volume of the grinding media is 30% to 60% of the volume of the grinding chamber.

  In the slurry supply apparatus of the present invention, a diaphragm pump is used as a pump, a diaphragm valve is used as a suction side and a discharge side valve, and the suction side and discharge side diaphragm valves are opened and closed in conjunction with the reciprocation of the diaphragm of the diaphragm pump. By doing so, smooth slurry supply can be performed. In the slurry flow path, there is nothing that interferes with the slurry flow except for the resistance when the valve is closed, so even if foreign matter is present in the slurry or the viscosity of the slurry is extremely high, it will malfunction. Smooth slurry supply can be performed.

  Further, the slurry can be easily extracted, and an expensive product slurry can be recovered. Furthermore, the pulsation rate can be controlled by precisely controlling the valve by gradually opening the valve to gradually release the resistance of the valve.

It is sectional drawing of the slurry supply apparatus by embodiment of this invention. It is a time chart which shows the stroke of the diaphragm of the diaphragm pump of the slurry supply apparatus shown in FIG. 1, and the time chart which shows the operating state of opening and closing of a suction valve and a discharge valve. It is sectional drawing which shows the media mixing type mill by one Embodiment of this invention. (A), (B), (C) is sectional drawing which shows the example of the blade member of the media separation member each used for the media mixing mill shown in FIG. It is a longitudinal cross-sectional view of a media mixing mill having a screen separator according to another embodiment of the present invention. It is a perspective view which shows the base used for the screen separator of FIG. It is a perspective view which shows the state which wound the metal foam plate which is a screen around the base of FIG. 6, and was fixed. It is a longitudinal cross-sectional view which shows the modification of a media mixing type mill. It is a longitudinal cross-sectional view of the media mixing type mill by other embodiment of this invention. FIG. 10 is a cross-sectional view taken along line AA in FIG. 9. It is sectional drawing which shows the slurry supply apparatus which uses the conventional type check valve.

Hereinafter, a slurry supply apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.
A slurry supply apparatus 10 according to an embodiment of the present invention includes a diaphragm pump 12 that is a reciprocating pump. The diaphragm pump 12 has a circular case 16 having a large circular opening 14 on one side, and a diaphragm 18 is provided in the opening 14. The front end of the main shaft 22 of the driving device 20 is attached to the center of the diaphragm 18, and the diaphragm 18 is reciprocated by the driving device 20 to perform a pump action by changing the volume in the case 16. Is.

  A suction nozzle 24 is provided at one end of the case 16, that is, the suction side, and a discharge nozzle 26 is provided at the other end, that is, the discharge side. A suction valve 28 that is a first diaphragm valve is provided inside the suction nozzle 24 of the case 16, and a discharge valve 30 that is a second diaphragm valve is provided inside the discharge nozzle 26 of the case 16.

  The suction valve 28 and the discharge valve 30 include fixed diaphragms 28a and 30a and movable diaphragms 28b and 30b, respectively. These movable diaphragms 28b and 30b are attached to the fixed diaphragms 28a and 30a by springs 32 and 34, respectively. The valve is normally closed in contact with the fixed diaphragms 28a and 30a. The movable diaphragms 28b and 30b are reciprocated by the drive devices 36 and 38 with the tips of the valve rods 40 and 42 of the drive devices 36 and 38 attached to the center thereof. These driving devices can be of an electromagnetic driving type or a fluid pressure driving type.

A control device 44 for controlling these drive devices is connected to the drive devices 20, 36, and 38. The control device 44 is composed of a CPU and the like.
FIG. 2 shows an example of a time chart for opening / closing the suction valve and the discharge valve and a time chart for the slurry discharge state. 2, A is a time chart for opening and closing the suction valve, B is a time chart for opening and closing the discharge valve, and C is a time chart showing the stroke of the diaphragm of the diaphragm pump of the slurry supply device.
Since the slurry supply apparatus of the present invention operates in the manner as described above, the suction side and the discharge side can be reversed.

  Next, a media mixing mill in which the slurry supply apparatus 10 described above is incorporated will be described. In the following description, a saddle type mill will be described, but the mill of the present invention may of course be a horizontal type.

  FIG. 3 shows a media mixing mill 110 according to an embodiment of the present invention, and the media mixing mill 110 includes a substantially spherical grinding vessel 112. The crushing vessel 112 includes a spherical crushing chamber 114 inside, and has a raw material inlet 116 for introducing a slurry-like raw material into the crushing chamber 114. In addition, as long as the crushing chamber 114 is spherical, the shape of the crushing vessel 112 itself may be any shape, but it is preferably spherical as described above. A circular opening 112a is provided in the lower center of the crushing vessel 112 (a similar opening is provided in a jacket described later), and the opening 112a projects above the upper center of the frame 118. The ring-shaped portion 118a is fitted. On the other hand, a circular opening 112b is provided at the upper center of the crushing container 112 (a similar opening is provided in a jacket described later), and the cylindrical casing 20 is fitted into this opening 112b. The lower end of the casing 120 extends vertically to the inside of the crushing chamber 114.

  A stirring member 122 is rotatably disposed in the center of the lower part of the grinding chamber 114 of the grinding container 112. The agitating member 122 may have a conventional structure. For example, the hub portion 122a disposed at the center, an extension portion 122b extending from the hub portion 122a in a radially outward direction by a predetermined length, and the extension portion 122b A stirring member main portion 122c substantially in the shape of a gear tooth supported at the outer peripheral tip is integrally provided. The extension 122b is provided with a plurality of openings 122d, and the plurality of openings 122d are a plurality of crushing media circulation openings. A rotation drive shaft 124 that is a stirring member drive shaft is fixed to the hub portion 122a. The rotary drive shaft 124 extends through the frame 118 downward in the axial direction, and an end thereof is connected to a drive source via a well-known drive mechanism (not shown), and rotates in a direction indicated by an arrow in the figure. Driven. The rotation axis (rotation axis) of the rotation drive shaft 124 preferably passes through the center of the spherical crushing chamber 114. The rotary drive shaft 124 is provided with a shaft seal 125 (mechanical seal or the like). As is well known in the media mixing mill, inside the pulverization container 112 is stored a bead-shaped pulverization medium 130 (shown extremely enlarged in the drawing). The grinding media 130 having a diameter of 0.02 to 2 mm can be used.

  Above the crushing chamber 114 of the crushing vessel 112 and in the vicinity of the center of the crushing chamber 114, the agitating member is disposed opposite to the stirring member in the axial direction and dispersed in the slurry-like raw material. A centrifugal media separating member 132 for separating the media 130 from the raw material is provided. The media separating member 132 is of a centrifugal impeller type and is preferably arranged coaxially with the stirring member, but the axis may be shifted. A hollow rotary drive shaft 134 is fixed to the media separating member 132. The drive shaft 134 extends upward through the casing 120, and its end is connected to a drive source via a well-known drive mechanism (not shown), and is driven to rotate in the direction indicated by the arrow in the figure. The rotary drive shaft 134 is provided with a shaft seal 136 (such as a mechanical seal). The hollow portion of the drive shaft 134 communicates with the internal space of the media separating member 132 to form a raw material outlet 138.

  The media separating member 132 has a plurality of blade members 144 arranged at equal intervals in the circumferential direction (coaxial to the rotation drive shaft 134) between the hub portion 132a and the closing plate 132b (see FIG. 4A). ). The blade members 144 may be arranged in a completely radial manner as shown in FIG. 4A, or may be arranged in an inclined manner as shown in FIG. 4B. Alternatively, the blade member 144 may have a quadrangular shape whose cross section gradually narrows inward as shown in FIG.

  A jacket 140 for passing a refrigerant body or a heat medium (usually a refrigerant body and cooling water) is provided on the outer periphery of the pulverization container 112 so that the temperature in the pulverization chamber 114 can be adjusted. The jacket 140 is provided with a cooling water inlet 142 for introducing cooling water into the lower part and a cooling water outlet 146 for discharging the cooling water into the upper part.

  The pulverization container 112 can be divided into two on a plane that passes through the center of the pulverization chamber 114 and is orthogonal to the rotation axis (vertical axis) of the stirring member 122. The same applies to the jacket 140. As a result, the crushing container 112 is opened so that maintenance can be easily performed.

  In the media mixing mill of the present invention, the stirring member 122 can be driven at a rotation speed in the range of 5 to 40 m / s, and the media separation member 132 is rotated at a rotation speed in the range of 10 to 20 m / s. It can be driven.

  In operation, the stirring member 122 is driven to rotate while introducing a raw material, which is a slurry containing particles to be crushed, from the raw material inlet 116 into the pulverization chamber 114. The slurry introduced into the pulverizing chamber 114 is moved downward in the direction of the agitating member 122 on the slurry already formed in the pulverizing chamber 114 and the rotating flow f1 of the medium 130, and is agitated and mixed by the agitating member 122. The The slurry and the medium 130 that have been mixed with stirring are now a flow f2 that moves up and around the inner wall of the crushing chamber 114, and when the slurry is completely lifted, this is the previous flow f1. Near the center of the crushing chamber 114 and slightly above, the slurry and the media are rotated by the media separating member 132. Due to this rotational movement, the medium having a large mass is biased radially outward and separated from the slurry. In this case, among the particles to be pulverized, particles that are not sufficiently pulverized and have a large particle size behave similarly to the media. On the other hand, the slurry containing particles that have been sufficiently pulverized and have a reduced mass enters the internal space of the media separating member 132 and is discharged to the outside of the media mixing mill via the raw material outlet 138 inside the rotating shaft 34. With this configuration, in the flows f1 and f2, the raw material particles are crushed and dispersed with good quality by contact with the freely moving grinding media, and as a result, a high-quality product is obtained. Moreover, according to the media mixing mill of the present invention, it is possible to achieve pulverization with a narrow particle size distribution width by the above-described action.

  In the media mixing mill according to the present invention, the stirring member 122 is sufficiently separated from the media separating member 132, so that the media separating member 132 has very little interference.

  Next, a media mixing mill incorporating a screen separator according to another embodiment of the present invention will be described.

  FIG. 5 is a longitudinal sectional view showing a media mixing mill according to another embodiment of the present invention. As shown in the figure, the media mixing mill 201 includes a cylindrical container 202, and a lid member 203 and a bottom member 204 are attached to the liquid nail at both ends of the container 202. A stirring member 206 that is rotatable so as to extend in the axial direction is disposed inside the container 202, and a space, that is, a crushing chamber 205 is formed between the stirring member 206 and the inner surface of the container 202. The grinding chamber 205 is filled with grinding media such as glass beads and ceramic beads. The grinding media is 20-200 μm in diameter for nanometer size grinding.

  A plurality of bar-shaped stirring means 207 are fixed to the stirring member 206 so as to protrude radially outward with an interval in the axial direction and the circumferential direction. The stirring means 207 may have a disk shape instead of a rod shape. In the case of a disk shape, a plurality of stirring means 207 are fixed to the stirring member 206 at intervals in the axial direction.

  A slurry inlet pipe 211 is fixed near one end in the axial direction adjacent to the lid member 203 of the container 202 to constitute a slurry inlet. The stirring member 206 has a shaft portion that passes through the lid member 203 and extends to the outside of the container 202, and this shaft portion is rotatable with respect to the container 202 by the support member 208 but supported so as not to move in the axial direction. Has been. The drive device for rotationally driving the stirring member 206 is an electric motor (not shown) or other suitable prime mover. A pulley 210 is attached to the above-described shaft portion of the stirring member 206, and the pulley 210 is connected to a pulley (not shown) provided on the output shaft of the prime mover by a transmission belt 209. By this connection, the stirring member 206 is rotationally driven by a prime mover such as an electric motor.

  The stirring member 206 has a cup-shaped hollow shape in which the end of the container 202 on the side far from the slurry inlet pipe 211 is opened as indicated by reference numeral 215, and the stirring member 206 is a wall portion corresponding to the hollow portion 212. A slit 216 is formed in the upper surface. The above-described opening 215 at the end of the stirring member 206 constitutes an inlet for circulating the grinding medium, and the slit 216 constitutes a return passage 217 for circulating the grinding medium.

In the hollow portion 212 of the stirring member 206, a slurry-outlet pipe 218 extending through the stirring member 206 into the hollow portion 212 is disposed. The end portion of the slurry outlet pipe 218 is located in the hollow portion 212 of the stirring member 206 and constitutes the slurry outlet 213. The slurry outlet pipe 218 communicates with the slurry outlet 213 and constitutes a slurry outlet passage that passes through the stirring member 206 in the axial direction.
A screen separator 214 is disposed in the hollow portion 212 of the stirring member 206 so as to surround the slurry outlet 213. The screen separator 214 is fixed to the stirring member 206 and rotates together with the stirring member 206.

  In operation, a slurry containing solid matter to be pulverized, such as calcium carbonate slurry, is continuously driven to rotate at a predetermined flow rate by a slurry pump (not shown). Are introduced continuously. Since the operation of the medium agitation type pulverizer is well known, detailed description thereof is omitted.

  In the vicinity of the end of the crushing chamber 205 far from the slurry inlet pipe 211, the slurry and the crushing medium are used for circulating the crushing medium formed by the opening 215 at the end of the stirring member 206 as indicated by an arrow 220. The slurry enters the hollow portion 212 of the stirring member 206 from the inlet, passes through the screen separator 214, and is taken out from the slurry outlet 213 through the slurry outlet pipe 218. Since the pulverizing medium is urged outward in the radial direction by the action of centrifugal force accompanying the rotation of the screen separator 214, the pulverizing chamber passes through the outlet 217 for circulating the pulverizing medium formed by the slit 216 away from the screen separator 214. It returns to 205. Accordingly, when the grinding medium has a small diameter, there is no possibility that the grinding medium clogs the screen separator 214. As a result, abnormal wear of the screen is prevented and the problem of abnormal heat generation does not occur.

  Next, the structure of the screen separator 214 used in the media mixing mill shown in FIG. 5 will be described with reference to FIGS.

  The screen separator 214 includes a pedestal 230 formed of a cylindrical body having a plurality of openings 230a formed in the peripheral wall as shown in FIG. When this pedestal 230 is attached to a media mixing mill, its two open ends are closed fluid-tight by a suitable member. A screen 232 is wound around and fixed to the periphery of the pedestal 230 as shown in FIG. The screen 232 is formed of a foam metal plate having a continuous pore structure. This foam metal plate has a thickness of 0.2 to 1.2 mm (the total thickness when it is thin), preferably 0.4 to 1.1 mm, and is a slurry foaming method or an investment method. It can be prepared by a hollow metal sintering method, a combustion synthetic foaming method, or the like.

  The metal foam plate is preferably fixed to the pedestal by resistance welding, yag laser welding, or brazing.

  The material forming the foam metal plate is preferably selected from the group of metal Ni, metal Ti, stainless steel, Ti alloy, Ni alloy and Co alloy, but other metals, alloys and intermetallic compounds. Can also be used according to the kind of raw material.

  The foam metal plate is preferably subjected to nickel chemical plating or nitriding treatment. The nickel chemical plating is for smoothing the surface of the screen and improving the wear resistance, and the nitriding treatment is for improving the wear resistance.

  The porosity of the metal foam plate is preferably 87% or more with a nominal pore diameter of 50 μm. Therefore, the passage resistance with respect to the raw material slurry is small, and it is optimal as a screen material. It is preferable that the nominal hole diameter of the hole of the said metal foam plate is 0.08 mm or less. When the nominal hole diameter of the hole in the metal foam plate exceeds the above value, it is impossible to use beads having a small diameter as described above.

FIG. 8 is a longitudinal sectional view showing a media mixing mill according to still another embodiment of the present invention. In this embodiment, portions corresponding to those of the embodiment of FIG. 5 are shown with the same reference numerals as those of FIG. 5, and the description will be made only on the differences from the embodiment of FIG.
In this embodiment, the slurry outlet tube 218 is formed separately from the stirring member 206.

  One end of the slurry outlet pipe 218 is positioned in the hollow portion 212 of the stirring member 206 to constitute the slurry outlet 213. The screen separator 214 surrounding the slurry outlet 213 has a rotation shaft that extends through the bottom member 204 in the axial direction and extends outside the container 202, and this rotation shaft is rotatable with respect to the bottom member 204 by the support member 221. Although supported, it is supported so as not to move in the axial direction. A pulley 223 is fixed to the outer end portion of the rotating shaft of the screen separator 214, and this rotating shaft is rotationally driven by a driving device such as an electric motor (not shown) via a transmission belt 222 wound around the pulley 223. . The operation of this embodiment is the same as that of the embodiment of FIG. The screen separator 214 may be a fixed type.

  In this embodiment, the diameter of the grinding medium, which is a bead, is 20 to 200 μm as described above, and the stirring member 206 is rotationally driven so that its peripheral speed is 3 to 8 m / sec. Here, the circumferential speed of the stirring member 206 is the rotational speed at the tip of the stirring unit 207 when the stirring unit 207 is provided in the stirring member 206.

Hereinafter, a media mixing mill according to still another embodiment of the present invention will be described.
FIG. 9 shows a media mixing mill 310 according to an embodiment of the present invention. The media mixing mill 310 includes a vertical cylindrical grinding container 312 having an end plate 312a that closes the top. Yes. The crushing container 312 includes a cylindrical crushing chamber 314 inside, and has a raw material slurry supply port 316 for introducing a slurry-like raw material into the crushing chamber 314.

  A stirring member 322 is rotatably disposed in the center of the lower part inside the grinding chamber 314 of the grinding container 312. The agitating member 322 is an impeller, and includes, for example, a pair of annular plates 322b and 322c that are fixed around the boss 322a and spaced apart from each other and a plurality of blades 322d disposed therebetween. Has been.

  The stirring member 322 is fixed at its upper end to a hub 322a of the stirring member 322, and a rotation drive shaft 324 which is a stirring member drive shaft extending from the grinding container 312 and the frame 318 downward in the axial direction is fixed thereto. Has been. The rotary drive shaft 324 is connected at its lower end to a drive source via a well-known drive mechanism (not shown) and is driven to rotate in the direction indicated by the arrow in the figure. The rotation axis (rotation axis) of the rotation drive shaft 324 preferably passes through the central axis of the crushing chamber 314. The rotary drive shaft 324 is provided with a shaft seal 325 (mechanical seal or the like).

  As is well known in the media mixing mill, a bead-shaped grinding medium 330 (shown extremely enlarged in the drawing) is accommodated in the grinding container 312. As the grinding media 330, one having a diameter of 0.02 to 2 mm can be used. The total volume of the grinding media is 30% to 60% of the volume of the grinding chamber. In a normal media mixing mill, the total volume of the grinding media is 75% to 90% of the volume of the grinding chamber. Therefore, the media mixing mill of the present invention has a small binding force and enables soft grinding and dispersion. It is.

  A medium 330 is disposed above the inside of the grinding chamber 314 of the grinding vessel 312 and in the vicinity of the center of the grinding chamber 314 so as to face the stirring member at an interval in the axial direction and dispersed in the raw material slurry. Is separated from the raw material by a centrifugal separation member 332. The media separating member 332 includes a boss 332a having a cylindrical main body having a space inside and a closing plate 332b for closing the lower portion of the main body. The main body of the boss 332a is provided with a plurality of holes from which only the raw material slurry is introduced into the space in the main body. The media separating member 332 is preferably arranged coaxially with the stirring member 322, but the axis may be shifted. A hollow rotary drive shaft 334 is fixed to the media separating member 332. The drive shaft 334 extends upward through the end plate 312b, and its end is connected to a drive source via a well-known drive mechanism (not shown) and is driven to rotate in the direction indicated by the arrow in the figure. . The rotational drive shaft 334 is provided with a shaft seal 336 (mechanical seal or the like). The hollow portion of the drive shaft 334 communicates with the internal space of the media separating member 332 and forms a raw material slurry outlet 338. A conventional screen can also be used as the media separating member.

  A jacket 340 for passing a refrigerant body or a heat medium (usually a refrigerant body and cooling water) is provided on the outer periphery of the pulverization container 312 so that the temperature in the pulverization chamber 314 can be adjusted. The jacket 340 is provided with a cooling water inlet 342 for introducing cooling water into the lower portion and a cooling water outlet 346 for discharging cooling water into the upper portion.

  The pulverization container 312 can be easily maintained by removing the end plate 312a to open the pulverization container 312.

  In this media mixing mill, the stirring member 322 can be driven at a rotational speed in the range of 5 to 30 m / s, and the media separating member 332 is at a rotational speed in the range of 10 to 20 m / s. It can be driven.

  A guide ring 350 is disposed in the lower part of the grinding chamber 314. The inner ring plate 352 includes an outer ring plate 354 spaced apart in the outer circumferential direction, an annular lower ring plate 356 constituting the lower side, and an upper ring plate 358 constituting the upper side, and the inside is liquid-tight. Yes.

  The guide ring 350 divides the lower portion of the crushing chamber 314 in the radial direction, and constitutes a crushing chamber lower portion inner portion 314a and an annular crushing chamber lower portion outer portion 314b. The pulverization chamber lower portion outer portion 314b functions as an ascending passage for the mixture of the pulverization media and the raw slurry.

  Since the guide ring 350 has the above-described structure, the guide ring 350 has an annular space 350a and is supported by a plurality of pipes 360a and 360b (see FIG. 10) attached to the pulverization container, and the pipes 360a and 360b are used to It is a structure that allows cooling water to flow through the annular space. Therefore, in the present invention, the raw slurry can be cooled also from the inside of the pulverization vessel 312.

  The pipes 360a and 360b preferably extend from above the crushing container 312 as shown in the drawing and support the guide ring 350 at the lower end.

  As shown in the drawing, the lower end of the guide ring 350 is higher than the upper end of the stirring member 322, and the upper end of the guide ring 350 is at a position spaced apart from the lower end of the media separating member 332 by a predetermined distance. preferable.

  The distance between the outer peripheral wall of the guide ring and the inner peripheral wall of the grinding container is preferably 10 to 50 mm. If the interval is less than the above lower limit, the movement of the beads is excessively constrained, and if the interval exceeds the upper limit, the degree of freedom increases excessively.

  The height of the guide ring is preferably 1/3 to 1/2 of the height of the grinding chamber. When the height is less than the above lower limit, the control of the bead flow becomes insufficient, and when the height exceeds the upper limit, the smoothness of the bead flow is impaired.

In operation, the stirring member 322 is rotationally driven while introducing the raw material slurry containing the particles to be crushed as the raw material from the raw material slurry supply port 316 into the pulverization chamber 314. The slurry introduced into the pulverizing chamber 314 is moved downward in the direction of the agitating member 322 on the rotating flow of the slurry already formed in the pulverizing chamber 314 and the medium 330, and is agitated and mixed by the agitating member 322. . At this time, the slurry and the medium 330 are moved radially outward to the inner wall of the crushing container 312, and then the slurry and the medium 330 that have been stirred and mixed are now between the inner wall of the crushing chamber 314 and the guide ring 350. The flow f moves up in the ascending passage, and when it rises up, this time, the flow descends earlier. Around the center of the crushing chamber 314 and slightly above, the slurry and the media are rotated by the media separating member 332. Due to this rotational movement, the medium having a large mass is biased radially outward and separated from the slurry. In this case, among the particles to be pulverized, particles that are not sufficiently pulverized and have a large particle size behave similarly to the media. On the other hand, the slurry containing particles that have been sufficiently pulverized and have a reduced mass enters the internal space of the media separating member 332 and is discharged to the outside of the media mixing mill through the raw material outlet 338 inside the rotating shaft 334. With this configuration, the raw material particles are crushed and dispersed with high quality by the contact of the freely moving grinding media in the above-described ordered flow, and as a result, a high-quality product is obtained. Moreover, according to the media mixing mill of the present invention, it is possible to achieve pulverization with a narrow particle size distribution width by the above-described action. Also, the amount of grinding media can be reduced.
In this media mixing mill, since the stirring member 322 is sufficiently separated from the media separating member 332, the interference of the media separating member 332 is extremely small.

DESCRIPTION OF SYMBOLS 10 Slurry supply apparatus 12 Diaphragm pump 14 Opening 16 Case 18 Diaphragm 20 Drive apparatus 22 Main shaft 24 Suction nozzle 26 Discharge nozzle 28 Suction valve 28a Fixed diaphragm 28b Movable diaphragm 30 Discharge valve 30a Fixed diaphragm 30b Movable diaphragm 34 Spring 36 Driving device 40 Valve stem 42 Valve stem 44 Control device

Claims (14)

A reciprocating pump, a first diaphragm valve provided on the suction side of the reciprocating pump, a second diaphragm valve provided on the discharge side, a first driving means for driving the first diaphragm valve, and the second diaphragm Second driving means for driving a valve, and control means for operating the first diaphragm valve and the second diaphragm valve in conjunction with the operation of the reciprocating pump by using the first driving means and the second driving means. The slurry supply apparatus characterized by the above-mentioned. The slurry supply apparatus according to claim 1, wherein the reciprocating pump is a diaphragm pump. The slurry supply apparatus according to claim 1 or 2, wherein the first driving means and the second driving means are electromagnetically driven. The slurry supply apparatus according to any one of claims 1 to 3, wherein the first drive means and the second drive means are fluid pressure driven. The slurry supply apparatus according to any one of claims 1 to 4, wherein the suction side and the discharge side can be reversed by setting the first diaphragm valve to the closed side and the first diaphragm valve to the open side during suction. A media mixing mill incorporating the slurry supply device according to claim 1. A pulverization container having a raw material inlet and having a spherical pulverization chamber, an agitation member rotatably installed in the pulverization chamber near the inner wall of the pulverization container, a pulverization medium placed in the pulverization chamber, and the pulverization media mixing mill according to claim 6 which comprises a centrifugal media separation member rotatably disposed to face the agitating member a chamber 8. The media mixing mill according to claim 6, wherein the stirring member can be driven at a rotational speed in a range of 5 to 40 m / s. The media mixing unit according to any one of claims 6 to 8, wherein the media mixing unit is a bowl type, wherein the stirring member is disposed below the crushing chamber, and the media separating member is disposed above the crushing chamber. Formula mill. The media separating member is fixed to one end, and includes a hollow media separating member drive shaft extending from the grinding chamber to the outside, and the inside of the media separating member drive shaft serves as a material outlet. The media mixing mill according to any one of? A media mixing mill using beads as grinding media, comprising a screen separator for separating the beads from the treated raw slurry, wherein the screen is formed of a foam metal plate having an open cell structure. Media mixing mill. A pulverization container having a bowl-shaped cylindrical pulverization chamber containing bead-shaped pulverization media, a raw material slurry supply port provided in the pulverization container, a lower portion of the pulverization chamber, and substantially coaxial with an axis of the pulverization chamber In a media mixing mill provided with a stirring member having a rotating shaft and a media separation member provided in the grinding chamber and above the stirring member, a lower portion of the grinding chamber is divided in a radial direction, and the grinding chamber 7. A medium according to claim 6, wherein a guide ring constituting a lower part inner part and an annular pulverization chamber lower part outer part is provided, and the pulverization chamber lower part outer part is used as an ascending passage for a mixture of the pulverization medium and the raw slurry Mixed mill. The media mixing mill according to claim 12, wherein the stirring member rotates at a peripheral speed of 5 to 30 m / s. 14. The media mixing mill according to claim 12, wherein the total volume of the grinding media is 30% to 60% of the volume of the grinding chamber.

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