JP6536332B2 - Gas holdup measurement jig and calculation method of gas holdup rate - Google Patents

Description

  The present invention relates to a gas hold-up measurement jig and a method of calculating a gas hold-up rate, and in particular, a flotation machine in which ore slurry is stored when flotation is carried out to increase the quality of copper contained in copper ore. The present invention relates to a gas holdup measurement jig for measuring a gas holdup rate in a mineral liquid layer and a calculation method of the gas holdup rate.

  In the smelting process of copper contained in copper ore, it is necessary to improve the grade of copper in order to finally recover high purity copper. Copper ore contains copper mineral and gangue, and operations widely referred to as beneficiation are widely carried out in order to separate copper of high copper grade from copper ore. Methods of beneficiary include flotation, manual selection, and gravity separation. Among them, in the flotation method, the copper ore can be crushed and suspended in water to form an ore slurry, and the copper mineral can be separated and levitated mainly by bubbles using a foaming agent or the like. It is separated from copper ore by beneficiary and its copper grade is called copper concentrate.

  Specifically, when the flotation method is selected to separate the copper mineral and the gangue from the copper ore mainly composed of the copper sulfide mineral, the copper mineral adheres to the bubbles and floats up, and the gangue is Will settle without adhering to air bubbles. In the flotation method, the entire amount of copper mineral adheres to bubbles in one operation and can not be separated, and it is not possible to separate the bubbles, while adjusting the amount of bubbles, pH of liquid, grinding conditions of ore, etc. It is common to operate and raise the grade of copper.

  Here, there is a gas holdup rate as a parameter for determining the flotation rate of fine mineral particles for separating the copper mineral and gangue component contained in the ore slurry and increasing the actual yield.

  For example, when the value of the gas holdup rate described later is too large, the bubbles are too small, and therefore, the gas will stay in the slurry, resulting in a problem that the floating speed is slow. On the other hand, when the value of the gas holdup rate is too small, the bubble is too large and the contact probability with the copper mineral becomes low, which causes a problem that the copper mineral can not be floated up.

  From this, in the flotation method, it is important to confirm an appropriate gas holdup rate in the ore slurry in advance.

  According to the description of Non-Patent Document 1, the gas holdup measurement jig 10 of the flotation machine is described. As shown in FIG. 8, this gas holdup measurement jig 10 is composed of a cylindrical plastic tube 12 with a diameter of 50 mm, with pinch valves 11a and 11b attached to both ends. In this gas holdup measurement jig 10, the three-way valve 13 passes compressed air through the air line 14 so that the pinch valves 11a and 11b at both ends are simultaneously opened and closed.

E. Sanwani, Y. Zhu, J.-P. Franzidis, EV Manlapig, J. Wu, "Comparison of gas hold-up distribution measurement in a flotation cell using capturing and conductivity techniques", MINERALS ENGINEERING, 20 March 2006, vol. .19 p. 1362-1372

  However, in the gas holdup measurement jig 10 described in Non-Patent Document 1, there is a problem that the operation takes time since the ore slurry is collected by the three-way valve 13 to measure the gas holdup rate. Furthermore, in the lab scale, when measuring the gas holdup rate, the size of the gas holdup measurement jig 10 is large and can not be used.

  Therefore, the present invention has been proposed in view of the above-mentioned conventional circumstances, and the operability for measuring the gas holdup rate is easy, and can be widely used from plant scale to lab scale. An object of the present invention is to provide a gas holdup measurement jig and a method of calculating a gas holdup rate.

That is, the gas holdup measurement jig according to one aspect of the present invention for achieving the above object comprises a transparent tubular portion extended in the longitudinal direction, a sealing valve portion attached to the lower end of the transparent tubular portion, and a seal The sealing valve includes a ball valve disposed in the stop valve, a cap attached to the upper end of the transparent tubular, and a grip supporting the transparent tubular via the cap. parts inside diameter valve seat diameter is provided for, Ties diameter of the ball valve is smaller than the inner diameter of the transparent tubular portion, rather larger than the inner diameter of the valve seat, gripper, which is connected to the upper end of the cap portion And a support rod connected to the upper end opposite to the lower end of the binding band connected to the cap portion .

In the gas holdup measurement jig according to another aspect of the present invention, the first transparent tubular portion extended in the longitudinal direction and the upper end portion of the first transparent tubular portion via the first sealing valve portion. A second transparent tubular portion which is attached and longitudinally extended, a second sealing valve portion which is attached to the lower end of the first transparent tubular portion, and the first sealing valve portion A first ball valve, a second ball valve disposed in the second sealing valve portion, a cap portion attached to the upper end of the second transparent tubular portion, and a second transparent tubular member through the cap portion A first valve seat for reducing the inner diameter of the second transparent tubular portion, and the second seal valve portion. A second valve seat for reducing the inner diameter of the first transparent tubular portion, wherein the diameter of the first ball valve is smaller than the inner diameter of the second transparent tubular portion , Larger than the inner diameter of the first valve seat, the diameter of the second ball valve is smaller than the inner diameter of the first transparent tubular portion, rather larger than the inner diameter of the second valve seat, the grip portion, the upper end of the cap portion A binding band connected to the part and a support rod connected to the upper end opposite to the lower end part of the binding band connected to the cap part are provided .

Furthermore, the calculation method of the gas holdup rate according to another aspect of the present invention is a gas holdup measurement jig by submerging the gas holdup measurement jig described above in the mineral liquid layer of the flotation machine stored in the ore slurry. The step of collecting the ore slurry in the transparent tubular portion, the step of pulling up the gas holdup measurement jig after collecting the ore slurry in the transparent tubular portion, and the gas holdup rate of the ore slurry obtained in the transparent tubular portion And a step of calculating according to the following equation.
α = {(V _G −V _L ) / V _G } × 100
α: Gas holdup rate (%)
V _G : Sum of bubble volume and solution volume of transparent tubular part (cm ³ )
V _L : Solution volume of transparent tubular part (cm ³ )

  ADVANTAGE OF THE INVENTION According to this invention, the operativity for measuring a gas holdup rate is easy, and also it can be used in a wide scale aspect from plant scale to lab scale.

It is a sectional view showing a gas holdup measurement jig concerning a 1st embodiment of the present invention. (A) And (B) is sectional drawing which shows the use condition by floatation of the gas holdup measurement jig which concerns on the 1st Embodiment of this invention. It is sectional drawing which shows the gas holdup measurement jig which concerns on the 2nd Embodiment of this invention. (A) And (B) is sectional drawing which shows the use condition by floatation of the gas holdup measurement jig which concerns on the 2nd Embodiment of this invention. It is sectional drawing which shows the gas holdup measurement jig which concerns on the 3rd Embodiment of this invention. (A) And (B) is sectional drawing which shows the use condition by floatation of the gas holdup measurement jig which concerns on the 3rd Embodiment of this invention. It is process drawing which shows the outline of the process in the calculation method of the gas holdup rate which concerns on embodiment of this invention. It is the schematic which shows the gas holdup measurement jig conventionally used.

Hereinafter, preferred embodiments of the present invention will be described in detail. Note that the present embodiment described below does not unduly limit the contents of the present invention described in the claims, and all of the configurations described in the present embodiment are essential as means for solving the present invention. Not necessarily. A gas holdup measurement jig and a method of calculating a gas holdup rate to which an embodiment of the present invention is applied will be described in detail in the following order.
1. Gas holdup measurement jig 2. Method of calculating gas holdup rate 2-1. Water sampling process 2-2. Pull-up process 2-3. Calculation process

[1. Gas holdup measurement jig]
First, the gas holdup measurement jig according to the present embodiment will be described. The gas holdup measurement jig according to the present embodiment includes a transparent tubular portion, a sealing valve portion, and a ball valve. Hereinafter, each embodiment of the present invention will be described with reference to FIG. 1 to FIG.

First Embodiment
FIG. 1 is a cross-sectional view showing a gas holdup measurement jig 100 (hereinafter, also referred to as “gas holdup measurement jig”) according to a first embodiment of the present invention. As shown in FIG. 1, the gas holdup measurement jig 100 according to the present embodiment includes a transparent tubular portion 110 extended in the longitudinal direction, and a sealing valve portion 112 attached to the lower end portion 111a of the transparent tubular portion 110. , And a ball valve 113 disposed in the sealing valve portion 112. The seal valve portion 112 is provided with a valve seat 114 for reducing the inner diameter of the transparent tubular portion 110, and the diameter of the ball valve 113 is smaller than the inner diameter of the transparent tubular portion 110 and larger than the inner diameter of the valve seat 114. It is characterized by The valve seat 114 is formed by reducing the diameter of the lower side of the sealing valve portion 112.

  The shape of the transparent tubular portion 110 is, for example, a cylinder whose cross section is formed in a circle, a rectangular tube whose cross section is formed in a square or a triangle, and the like, among which a cylinder is preferable. The cylinder is preferably used as the transparent tubular portion 110 because there is no corner as in the case of a square tube, so it can be made smaller and smaller and can be used not only on a plant scale but also on a lab scale. In addition, since there is no corner as in a square tube, no bubbles (gas) remain in the corner, so that an error in the gas contained in the target solution is unlikely to occur. As a result, the gas holdup rate can be measured more accurately.

  Examples of the material of the transparent tubular portion 110 include polyvinyl chloride (PVC), polyethylene (PE), polyethylene terephthalate (PET), and polyphenol (PH). These are excellent in water resistance, solvent resistance, and the like.

  The transparent tubular portion 110 is formed of a transparent material because, for example, the air layer and the liquid layer can be visually confirmed to measure the gas holdup rate in the flotation machine.

  It is preferable to provide a metal weight on the side wall of the lower end portion 111 a of the transparent tubular portion 110. For example, there is a possibility that the lower end portion 111a of the transparent tubular portion 110 can not reach the measurement point due to the buoyancy by the slurry in which the transparent tubular portion 110 is stored in the mineral liquid layer in the flotation machine. As a result, the gas holdup rate can not be measured. Therefore, in order to prevent such a situation, it is preferable to provide a metal weight on the lower side wall of the transparent tubular portion 110.

  Preferably, a scale is provided on the side wall of the transparent tubular portion 110. Here, providing a scale means attaching a sheet of the scale, or marking the scale on the side wall of the transparent tubular portion 110 or the like. Thereby, the gas holdup rate can be measured immediately after collecting the slurry without using a measure or the like. For this reason, since it is not necessary to consider a measurement error by evaporation of the slurry by a time-dependent change etc., a more accurate gas holdup rate can be measured.

  In the transparent tubular portion 110 of the gas holdup measurement jig 100, for example, the slurry can be collected to measure the gas concentration. In the transparent tubular portion 110, the specific gravity of the material of the ball valve 113 disposed in the sealing valve portion 112 needs to be larger than the specific gravity of the slurry. Thus, the ball valve 113 can function as a plug in the valve seat 114 provided in the sealing valve portion 112 by sinking in the slurry contained in the transparent tubular portion 110.

  For example, in the gas holdup measurement jig 100, when it is used for the mineral liquid layer of the flotation machine stored in the ore slurry, the specific gravity of the material of the ball valve 113 needs to be larger than the specific gravity of the ore slurry. In addition, this ore slurry refers to what was prepared so that it might become 20 weight% of solid content concentration, when the ore which grind | pulverized copper ore was made into a solute and a pure water is made into a solvent.

  Generally, the specific gravity of the above-mentioned ore slurry (liquid temperature 25 ° C.) is about 1.2. Then, the specific gravity of the material of the ball valve 113 is preferably 1.25 to 3.00. In the transparent tubular portion 110, as the ball valve 113, polyethylene terephthalate (specific gravity: 1.34 to 1.39), polyvinyl chloride (specific gravity: 1.35 to 1.45), polyvinylidene chloride (specific gravity: 1.65) It is preferable to be formed of at least one of the following materials: -1.72) and polytetrafluoroethylene (specific gravity: 2.14 to 2.2), and particularly polyvinyl chloride in view of solvent resistance, water resistance, etc. Is preferred.

  On the other hand, when the specific gravity of the ball valve 113 exceeds 3.00, buoyancy does not act on the ball valve 113 in the ore slurry, and the ball valve 113 keeps closing the valve seat 114 provided in the sealing valve portion 112. . As a result, the ore slurry can not be collected from the valve seat 114 provided in the sealing valve portion 112.

  The diameter of the ball valve 113 is smaller than the inner diameter of the transparent tubular portion 110, and there is a gap between the ball valve 113 and the transparent tubular portion 110 so that the ball valve 113 floats by the buoyancy of the slurry. preferable. It is particularly preferable that a gap of 0.1 mm to 2.0 mm be provided between the ball valve 113 and the transparent tubular portion 110.

  A sealing valve portion 112 is attached to the lower end portion 111 a of the transparent tubular portion 110. The outer shape of the sealing valve portion 112 is, for example, a cylinder or a rectangular tube so as to fit the transparent tubular portion 110. For example, when the transparent tubular portion 110 is a cylinder, the outer shape of the sealing valve portion 112 is a cylinder.

  Further, the sealing valve portion 112 is provided with a valve seat 114 for reducing the inner diameter of the transparent tubular portion 110. A hole is formed in a circular shape at a central portion of the cross section of the valve seat 114. If the holes at the center of the cross section of the valve seat 114 are formed at the four corners, the spherical ball can not close the holes and can not be used as a plug.

  Further, the diameter of the ball valve 113 is larger than the inner diameter (diameter of the hole) of the valve seat 114. As a result, when the slurry is collected by the gas holdup measurement jig 100, the ball valve 113 of the transparent tubular portion 110 closes the valve seat 114 provided in the sealing valve portion 112. As a result, it is possible to block the mixing of the slurry other than the measurement point.

  Examples of the material of the sealing valve portion 112 include polyethylene, polyethylene terephthalate, polyphenol and the like. These are excellent in water resistance, solvent resistance, and the like.

  As shown in FIG. 1, the gas holdup measurement jig 100 further includes a cap portion 115 attached to the upper end portion 111 b of the transparent tubular portion 110 and a grip portion 116 supporting the transparent tubular portion 110 via the cap portion 115. It is preferable to have. In the gas holdup measurement jig 100, the slurry contained in the transparent tubular portion 110 is warmed by human body temperature and the like, and the grip unit 116 is further provided in order not to affect the measurement of the gas holdup rate.

  In addition, the grip 116 is connected to the binding band 118 connected to the upper end 117 of the cap 115 and the support connected to the upper end 119 b opposite to the lower end 119 a of the binding band 118 connected to the cap 115 Preferably, a weir 120 is provided. Thereby, the angle between the transparent tubular portion 110 and the grip portion 116 can be freely changed to 45 ° to 180 °, so that the selectivity of the measurement position is excellent.

  The shape of the cap portion 115 is not particularly limited, but it is preferable that a ring that can be fixed to the upper end portion 117 be provided. In the cap unit 115, as a material, for example, polyethylene, polyethylene terephthalate, polyphenol and the like can be mentioned. These are excellent in water resistance, solvent resistance, and the like.

  The shape of the binding band 118 is not particularly limited, but may be a ring. In addition, the binding band 118 is preferably made of a flexible material. As the flexible material, resins such as silicone rubber, elastomer resin, polypropylene (PP), polyethylene or composite materials thereof are used, and silicone rubber or elastomer resin can be mentioned among them. Here, the elastomer resin includes olefins, styrenes, and the like.

  The shape of the support rod 120 is not particularly limited, but a rod-like one is preferable. Moreover, the material of the support rod 120 is not particularly limited, and examples thereof include metal and wood.

  FIG. 2: is sectional drawing which shows the use condition by floatation of the gas holdup measurement jig which concerns on the 1st Embodiment of this invention. First, in the gas holdup measurement jig 100 shown in FIG. 1, the ball valve 113 is disposed in the sealing valve portion 112 before the gas holdup measurement jig 100 is put into the floater 130 shown in FIG. 2. Next, as shown to FIG. 2 (A), it injects into the mineral-liquid layer 133 of the floatation machine 130 from the lower end part 132 side of the transparent tubular part 131 using the support weir 134. As shown in FIG. Until the lower end 132 of the transparent tubular portion 131 reaches the portion to be measured (measurement point) of the mineral layer 133 below the froth layer (foam layer) 135 of the flotation device 130, the transparent tubular portion 131 is Lower in the mineral solution layer 133 in the vertical direction. Next, when the lower end portion 132 of the transparent tubular portion 131 reaches the measurement point, the transparent tubular portion 131 is allowed to stand for 1 second, and the ore slurry of the mineral liquid layer 133 at the measurement point is provided to the sealing valve portion 136 Water is collected through the valve seat 137. Thereafter, as shown in FIG. 2 (B), the ball valve 138 closes the valve seat 137 after one second, and vibration is not quickly applied so that the ore slurry of the mineral solution layer 133 does not enter from the sealing valve portion 136. Pull up the gas holdup measurement jig vertically. The height of the air layer in the transparent tubular portion 131 is read from the scale of the measure, and the gas holdup rate is calculated from the total volume and the solution volume. In addition, a gas holdup measurement jig is not limited to the magnitude | size determined by a ratio with the floatation machine 130 shown by FIG. 2 (A) and FIG. 2 (B). In FIGS. 2A and 2B, the gas holdup measurement jig is expressed larger than the actual size so that the description of the drawings can be easily understood.

Second Embodiment
FIG. 3 is a cross-sectional view showing a gas holdup measurement jig 200 according to a second embodiment of the present invention. As shown in FIG. 3, the gas holdup measurement jig 200 according to the present embodiment has a first transparent tubular portion 210 a stretched in the longitudinal direction and a first upper end portion 211 a of the first transparent tubular portion 210 a. And a second transparent valve portion 212b attached to the lower end portion 211b of the first transparent tubular portion 210a and extending in the longitudinal direction. And a first ball valve 213a disposed in the first sealing valve portion 212a and a second ball valve 213b disposed in the second sealing valve portion 212b. Then, the first sealing valve portion 212a is provided with a first valve seat 214a for reducing the inner diameter of the second transparent tubular portion 210b, and the second sealing valve portion 212b is provided with a first valve seat 214a. A second valve seat 214b is provided to reduce the inner diameter of the transparent tubular portion 210a, the diameter of the first ball valve 213a is smaller than the inner diameter of the second transparent tubular portion 210b, and the inner diameter of the first valve seat 214a Larger, it is characterized in that the diameter of the second ball valve 213b is smaller than the inner diameter of the first transparent tubular portion 210a and larger than the inner diameter of the second valve seat 214b.

  In the gas holdup measurement jig 200, as shown in FIG. 3, it is preferable to provide a buffer portion 215 for attaching the small diameter portion of the first sealing valve portion and the first transparent tubular portion 210a. . Thereby, the measurement error of the gas holdup rate due to the liquid leakage of the collected slurry can be prevented. Although it does not specifically limit as a material of the buffer part 215, A silicon member etc. are mentioned. For example, a silicon tape is used for the buffer unit 215.

  In the gas holdup measurement jig 200, as shown in FIG. 3, a length L11 from the upper end portion 216a of the second transparent tubular portion 210b to the lower end portion 216b of the second transparent tubular portion 210b and a first transparent tubular portion The length L12 from the upper end portion 211a of the portion 210a to the lower end portion 211b of the first transparent tubular portion 210a is preferably L11: L12 = 3: 7 to 1: 9. As a result, when the gas holdup measurement jig 200 is pulled up after water sampling, the first ball valve 213a is sealed in a first sealing manner to shut off the outside air from the upper end portion 216a of the second transparent tubular portion 210b. The valve portion 212a is closed, and the second ball valve 213b closes the second sealing valve portion 212b. As a result, the gas holdup measurement jig 200 shown in FIG. 2 can obtain measurement results with higher accuracy.

  In the gas holdup measurement jig 200, as shown in FIG. 3, the cap portion 217 attached to the upper end portion 216a of the second transparent tubular portion 210b and the second transparent tubular portion 210b via the cap portion 217 are supported. It is preferable to further include a grip portion 218. Further, the grip portion 218 is supported by the binding band 220 connected to the upper end 219 of the cap portion 217 and the upper end 221 b opposite to the lower end 221 a of the binding band 220 connected to the cap 217. Preferably, a weir 222 is provided.

  Further, the gas holdup measurement jig 200 preferably further includes a transparent tubular skirt (not shown) attached to the first transparent tubular portion via the second sealing valve 212b. Accordingly, when the slurry is collected by the gas holdup measurement jig 200, the water collection from the lateral direction can be rectified in the upper vertical direction. As a result, an accurate gas holdup rate can be measured.

  FIG. 4: is sectional drawing which shows the use condition by floatation of the gas holdup measurement jig which concerns on the 2nd Embodiment of this invention. First, in the gas holdup measurement jig 200 shown in FIG. 3, before the gas holdup measurement jig 200 is put into the floater 230 shown in FIG. It is arrange | positioned in 2 sealing valve part 212b. Next, as shown to FIG. 4 (A), it supports from the lower end part 232 side of the 1st transparent tubular part 231a using the support rod 234 to the mineral-liquid layer 233 of a flotation machine. Next, as shown in FIG. 4A, until the lower end portion 232 of the first transparent tubular portion 231a reaches the portion (measurement point) to be measured of the mineral layer 233 below the floss layer 235 of the flotation unit 230. , Lower the first transparent tubular portion 231a vertically into the mineral liquid layer 233 of the ore slurry. Next, when the lower end portion 232 of the first transparent tubular portion 231a reaches the measurement point, the first and second transparent tubular portions 231a and 231b are allowed to stand for 1 second, and the ore of the mineral liquid layer 233 at the measurement location The slurry is collected into the first and second transparent tubular portions 231a and 231b. After that, as shown in FIG. 4B, after one second, the first ball valve 236a closes the first valve seat 238a provided in the first sealing valve portion 237a, and the second ball valve 236b Blocks the second valve seat 238b provided in the second sealing valve portion 237b, so that the gas hold quickly without giving vibration so that the ore slurry of the mineral layer 233 does not enter from the second valve seat 238b. Pull up the measuring jig in the vertical direction. The height of the air layer in the transparent tubular portion is read from the scale of the measure, and the gas holdup rate is calculated from the total volume and the solution volume described later. The gas holdup measurement jig has a size determined by the ratio with the flotation machine 230 shown in FIGS. 4 (A) and 4 (B) as in FIGS. 2 (A) and 2 (B). It is not limited to

  Thereby, when pulling up the gas hold-up measurement jig after the water sampling of the slurry, the first sealing valve is closed by the first ball valve, and the second sealing valve is the second ball valve. By plugging, the contact with the outside air can be shut off. For this reason, it is not necessary to be aware of the speed of raising. As a result, particularly accurate gas holdup rates can be measured.

Third Embodiment
FIG. 5 is a cross-sectional view showing a gas holdup measurement jig according to a third embodiment of the present invention. As shown in FIG. 5, the gas holdup measurement jig 300 according to the present embodiment includes a transparent tubular portion 310 extended in the longitudinal direction and a sealing valve portion 312 attached to the lower end portion 311a of the transparent tubular portion 310. , And a ball valve 313 disposed in the sealing valve portion 312. The seal valve portion 312 is provided with a valve seat 314 for reducing the inner diameter of the transparent tubular portion 310, and the diameter of the ball valve 313 is smaller than the inner diameter of the transparent tubular portion 310 and larger than the inner diameter of the valve seat 314. . Further, it is characterized by further comprising a transparent tubular skirt portion 315 attached at the lower end portion 311a of the transparent tubular portion 310 via the sealing valve portion 312.

  In the gas holdup measurement jig 300, as shown in FIG. 5, in order to attach the small diameter portion of the sealing valve portion 312 and the transparent tubular portion 310, it is preferable to provide a buffer portion 316. Thereby, the measurement error of the gas holdup rate due to the liquid leakage of the collected slurry can be prevented. Although it does not specifically limit as a material of a buffer part, A silicon member etc. are mentioned. For example, a silicon tape is used for the buffer unit 215.

  In the gas holdup measurement jig 300, as shown in FIG. 5, the length L21 from the upper end 311b of the transparent tubular portion 310 to the lower end 311a of the transparent tubular portion 310 and the transparent tubular from the lower end 311a of the transparent tubular portion 310 The length L22 of the lower end portion 317 of the skirt portion 315 is preferably L21: L22 = 2: 8 to 9: 1. Thus, when the slurry is collected by the gas holdup measurement jig 300, the water collection from the lateral direction can be rectified in the upper vertical direction. Furthermore, accurate gas holdup rates can be measured.

  As shown in FIG. 5, the gas holdup measurement jig 300 further includes a cap portion 318 attached to the upper end portion 311b of the transparent tubular portion 310, and a gripping portion 319 supporting the transparent tubular portion 310 via the cap portion 318. It is preferable to have. In addition, the grip portion 319 is connected to the binding band 321 connected to the upper end portion 320 of the cap portion 318, and the support connected to the upper end portion 322b opposite to the lower end portion 322a of the binding band 321 connected to the cap portion 318. Preferably, a weir 323 is provided.

  FIG. 6 is a cross-sectional view showing a state of use of the gas hold-up measurement jig according to the third embodiment of the present invention by floatation. First, in the gas holdup measurement jig 300 shown in FIG. 5, the ball valve 313 in the transparent tubular portion 310 is placed at the lower end portion 311a before the gas holdup measurement jig 300 is inserted into the floater 330 shown in FIG. It is disposed at the sealing valve portion 312 to be attached. Next, as shown in FIG. 6 (A), the bottom end 332 of the transparent tubular skirt portion 331 is introduced into the mineral solution layer 333 of the flotation machine using the support rod 334. Next, as shown in FIG. 6A, the lower end portion 332 of the transparent tubular skirt portion 331 is transparent until it reaches a portion (measurement point) to be measured of the mineral layer 333 below the floss layer 335 of the flotation unit 330. The tubular portion 336 is vertically lowered into the ore slurry mineral layer 333. Next, when the lower end portion 332 of the transparent tubular skirt portion 331 reaches the measurement point, the transparent tubular portion 336 is allowed to stand for 1 second to collect the ore slurry of the mineral layer 333 at the measurement point into the transparent tubular portion 336 Do. Here, when collecting the slurry, it is possible to rectify the water collection from the lateral direction in the upper vertical direction via the transparent tubular skirt portion 331. After that, as shown in FIG. 6B, the ball valve 337 closes the valve seat 339 provided in the sealing valve portion 338 after one second and does not give vibration so that the ore slurry does not enter from the valve seat 339. Quickly pull up the gas holdup measurement jig in the vertical direction. The height of the air layer in the transparent tubular portion 336 is read from the scale of the measure, and the gas holdup rate is calculated from the total volume and the solution volume described later. In addition, the gas holdup measurement jig is the flotation machine shown in FIGS. 6 (A) and 6 (B) as in FIGS. 2 (A), 2 (B), 4 (A) and 4 (B). It is not limited to the size determined by the ratio with 330.

  As described above, the gas holdup measurement jig according to the present embodiment is easy to operate for measuring the gas holdup rate, as compared to the conventional case. In addition, the gas holdup measurement jig according to the present embodiment is not only used for plant scale as in the past, but can be used in a wide scale manner from plant scale to lab scale.

[2. Method of calculating gas holdup rate]
First, the method of calculating the gas holdup rate according to the present embodiment will be described. The method of calculating the gas holdup rate according to the present embodiment is, as shown in FIG. 7, a step of collecting water in the transparent tubular portion by sinking in the slurry contained in the container (hereinafter, “water collecting step S1” And collecting the slurry in the transparent tubular part and pulling it up (hereinafter also referred to as “pulling step S2”), and calculating the gas holdup rate for the slurry obtained in the transparent tubular part ( Hereinafter, it is also referred to as “calculation step S3”. Each of the steps will be described below.

<2-1. Water sampling process>
In the water collecting step S1, the ore slurry is collected in the transparent tubular portion of the gas hold-up measurement jig by immersing the gas hold-up measurement jig in the mineral liquid layer of the flotation machine stored in the ore slurry.

  Specifically, in the water collection step S1, for example, the gas holdup measurement jig 100 shown in FIG. 1 is vertically sunk in the mineral liquid layer of the flotation machine in which the ore slurry is stored. At that time, the ball valve in the sealing valve portion 112 is obtained by collecting the ore slurry from the valve seat 114 provided in the sealing valve portion 112 attached to the transparent tubular portion 110 of the gas holdup measurement jig 100. 113 floats with the rise of the water surface of the ore slurry by the buoyancy by the ore slurry. Thereby, since the ball valve 113 and the valve seat 114 are separated, the ore slurry starts to be collected via the valve seat 114. Next, in the water collecting step S1, the lower end portion 111a of the transparent tubular portion 110 is allowed to stand for 1 second in the mineral liquid layer of the portion to be measured below the floss layer (foam layer). Thereby, the inside of the transparent tubular portion 110 is filled with the collected ore slurry and gas (air). And in water collection process S1, ball valve 113 will block valve seat 114 provided in sealing valve part 112 one second. For this reason, since the valve seat 114 to which the ball valve 113 is grounded shuts off the ore slurry, it is possible to stop the water collection of the ore slurry. In the water collecting step S1, not only the gas holdup measurement jig 100 shown in FIG. 1 but also the gas holdup measurement jig 200 shown in FIG. 3 and the gas holdup measurement jig 300 shown in FIG. 5 may be used. it can.

  Therefore, in the water collection step S1, the ore slurry can be collected in the transparent tubular portion 110 of the gas holdup measurement jig 100.

2-2. Pulling process>
In the pulling step S2, after the slurry is collected in the transparent tubular portion 110, the gas holdup measurement jig 100 is pulled.

  In the pulling up step S2, the gas holdup measurement jig 100 provided with the transparent tubular portion 110 containing the ore slurry obtained in the water collecting step S1 described above is prevented from entering the ore slurry from both ends of the transparent tubular portion 110. In order to take out the transparent tubular portion 110 from the mineral layer of the flotation machine, it is quickly pulled up in the vertical direction without vibration.

  Accordingly, in the pulling step S2, the gas holdup measurement jig 100 provided with the transparent tubular portion 110 containing the ore slurry can be pulled up.

<2-3. Calculation process>
In the calculation step S3, the gas holdup rate is calculated by the following equation for the ore slurry obtained in the transparent tubular portion 110.
α = {(V _G −V _L ) / V _G } × 100
α: Gas holdup rate (%)
V _G : Sum of bubble volume and solution volume of transparent tubular part (cm ³ )
V _L : Solution volume of transparent tubular part (cm ³ )

In the calculation step S3, regarding the gas hold-up measurement jig 100 pulled up in the pulling step S2, the height of the gas layer of the transparent tubular portion 110 is read from the scale of the measure, and the transparent tubular portion 110 is read from the bottom area of the transparent tubular portion 110. The bubble volume (V _G −V _L ) of In the calculation step S3, the height of the liquid layer of the transparent tubular portion 110 is read from the scale of the measure, and the solution volume (V _L ) of the transparent tubular portion 110 is determined from the bottom area of the transparent tubular portion 110. Then, in the calculating step S3, the solution volume of the bubble volume _(V G -V _L) and transparent tubular portion 110 of the transparent tubular part 110 _{(V L)} by substituting each value into the above expression, the gas holdup rate Calculate

  Therefore, in calculation process S3, the gas holdup rate in a flotation machine can be calculated.

  As described above, in the method of calculating the gas holdup rate according to the present embodiment, the operability for measuring the gas holdup rate is easy, and the gas holdup rate can be easily calculated. .

  EXAMPLES Specific examples to which the present invention is applied will be described below, but the present invention is not limited to these examples.

  First, in the embodiment, the gas holdup measurement jig according to the present embodiment includes a transparent tubular portion (cylinder) made of PVC, a sealing valve portion attached to the lower end portion of the transparent tubular portion, and PE sealing. It was equipped with a ball valve made of PVC placed in the valve section. The seal valve portion is provided with a valve seat for reducing the inner diameter of the transparent tubular portion, the diameter (16 mm) of the ball valve is smaller than the inner diameter (16.5 mm) of the transparent tubular portion, and the inner diameter (14 mm) of the valve seat ) Was greater. The transparent tubular part was prepared with a measure attached. The transparent tubular portion had an outer diameter of 18 mm. Further, in the embodiment, the cap portion attached to the upper end portion of the transparent tubular portion and the binding band are attached, and the binding band and the support rod made of metal are connected with a vinyl tape.

  In the gas holdup jig, in order to prove the accuracy of the gas holdup rate, the value of the gas holdup rate of the Jameson flotation machine was measured by the following two methods.

In measurement method 1, only the tap water (air is introduced) mixed with the foaming agent (MIBC (4-methyl-2-pentanol (4-methyl-2-pentanol)) and the addition amount of 30 μL in the above-mentioned flotation machine Not filled, and the liquid level was measured to determine the initial volume. In measurement method 1, air at 0.2 L / min is introduced into stored tap water, and a 2 inch microcell is used, assuming that the froth layer (foam layer) above the liquid surface is air, and the liquid surface height Was measured to determine the volume. In measurement method 1, since the increase from the initial volume corresponds to the bubble volume, the sum of the bubble volume and the solution volume is 2961 (cm ³ ), and the bubble volume is 257.4 (cm ³ ). The gas holdup rate was calculated by the following equation using these values.
α = {(V _G −V _L ) / V _G } × 100
α: Gas holdup rate (%)
V _G : Sum of bubble volume and solution volume (cm ³ )
V _L : solution volume (cm ³ )

  As a result, the value of the gas holdup rate calculated by measurement method 1 was 8.7%.

In measurement method 2, tap water mixed with a foaming agent was placed in the above-mentioned flotation machine, and air of 0.2 L / min was introduced. In measurement method 2, the gas holdup jig shown in FIG. 1 was introduced below the floss layer, and after the ball valve closed the valve seat, it was quickly pulled up to measure the liquid level. Then, the gas holdup rate was calculated from the total volume and the solution volume by the following equation.
α = {(V _G −V _L ) / V _G } × 100
α: Gas holdup rate (%)
V _G : Sum of bubble volume and solution volume of transparent tubular part (cm ³ )
V _L : Solution volume of transparent tubular part (cm ³ )

In measurement method 2, since the sum of the bubble volume and the solution volume is 67.2 (cm ³ ) and the bubble volume is 5.15 (cm ³ ), the gas holdup rate is calculated using these values. did.

  As a result, the value of the gas holdup rate calculated by measurement method 2 was 7.7%.

(Discussion)
In the example, the value of gas holdup calculated by measurement method 1 was 8.7%, and the value of gas holdup calculated by measurement method 2 was 7.7%. Since the values of the gas holdup according to measurement methods 1 and 2 are substantially the same, it is considered that the gas holdup rate can be measured with high accuracy by the gas holdup measurement jig shown in FIG.

  In addition, the 2 inch microcell used in the measurement method 1 had a width of 5.08 cm. On the other hand, the gas holdup jig used in measurement method 2 had an outer diameter of 18 mm. From this, this gas holdup jig was able to be reduced about 1/3 the width of the conventional 2 inch microcell. Therefore, it was confirmed that the gas holdup jig according to the present embodiment also has the merit of downsizing.

  The gas holdup measurement jig and the calculation method of the gas holdup rate of the present invention can be suitably used for the flotation step in nonferrous metal smelting and are extremely useful.

DESCRIPTION OF SYMBOLS 100 gas holdup measurement jig, 110 transparent tubular part, 111a lower end part, 111b upper end part, 112 sealing valve part, 113 ball valve, 114 valve seat, 115 cap part, 116 gripping part, 117 upper end part of cap part 118 Binding band, lower end of 119a binding band, upper end of 119b binding band, 120 support rod, 200 gas holdup measurement jig, 210a first transparent tubular part, 210b second transparent tubular part, 211a first transparent tubular Upper end of the part, 211b lower end of the first transparent tubular part, 212a first sealing valve part, 212b second sealing valve part, 213a first ball valve, 213b second ball valve, 214a first 1 valve seat, 214 b second valve seat, 215 shock absorber, 216 a upper end of second transparent tubular portion, 216 b second permeable Lower end of tubular part, 217 cap, 218 grips, 219 upper end of cap, 220 tie band, 221 a lower end of tie band, 221 b upper end of tie band, 222 support rod, 300 gas hold-up measuring jig, 310 Transparent tubular part, 311a lower end part, 311b upper end part, 312 sealed valve part, 313 ball valve, 314 valve seat, 315 transparent tubular skirt part, 316 buffer part, 317 lower end part of transparent tubular skirt part, 318 cap part, 319 grip part, 320 upper end part of cap part, 321 binding band, 322a lower end part of binding band, 322b upper end part of binding band, 323 support rod, S1 water collecting process, S2 pulling process, S3 calculating process

Claims (8)

A longitudinally extending transparent tubular section;
A sealing valve attached to the lower end of the transparent tubular portion;
A ball valve disposed in the sealing valve portion;
A cap attached to the upper end of the transparent tubular part;
And a grip portion for supporting the transparent tubular portion via the cap portion ,
The sealing valve portion is provided with a valve seat for reducing the inner diameter of the transparent tubular portion,
The diameter of the ball valve is smaller than the inner diameter of the transparent tubular portion, rather larger than the inner diameter of the valve seat,
The gripping portion is provided with a binding band connected to the upper end of the cap, and a support rod connected to the upper end opposite to the lower end of the binding band connected to the cap. Gas hold-up measurement jig characterized by   The gas holdup measurement jig according to claim 1, wherein a scale is provided on a side wall of the transparent tubular portion.   3. The gas holdup measurement jig according to claim 1, wherein the ball valve is formed of at least one of polyethylene terephthalate, polyvinyl chloride, polyvinylidene chloride, and polytetrafluoroethylene. The gas holdup measurement jig according to any one of claims 1 to 3 , further comprising a transparent tubular skirt attached at the lower end of the transparent tubular portion via the sealing valve. A first transparent tubular portion which is longitudinally stretched;
A second transparent tubular portion attached at the upper end of the first transparent tubular portion via a first sealing valve portion and stretched in the longitudinal direction;
A second sealing valve attached to the lower end of the first transparent tubular portion;
A first ball valve disposed in the first sealing valve portion;
A second ball valve disposed in the second sealing valve portion;
A cap attached to the upper end of the second transparent tubular part;
And a grip portion for supporting the second transparent tubular portion via the cap portion ,
The first sealing valve portion is provided with a first valve seat for reducing the inner diameter of the second transparent tubular portion,
The second sealing valve portion is provided with a second valve seat for reducing the inner diameter of the first transparent tubular portion,
The diameter of the first ball valve is smaller than the inner diameter of the second transparent tubular portion and larger than the inner diameter of the first valve seat,
The diameter of the second ball valve is smaller than the inner diameter of the first transparent tubular portion, rather greater than the inner diameter of the second valve seat,
The gripping portion is provided with a binding band connected to the upper end of the cap, and a support rod connected to the upper end opposite to the lower end of the binding band connected to the cap. Gas hold-up measurement jig characterized by The gas holdup measurement jig according to claim 5 , further comprising a transparent tubular skirt attached at the lower end of the first transparent tubular portion via the second sealing valve. The gas holdup measurement jig according to any one of claims 1 to 6 , which is used for a mineral liquid layer of a flotation machine stored in ore slurry. The gas holdup measurement jig according to any one of claims 1 to 7 is sunk in the mineral solution layer of the flotation machine stored in the ore slurry to thereby form the transparent tubular portion of the gas holdup measurement jig. Collecting the ore slurry;
Collecting the ore slurry in the transparent tubular portion and then pulling up the gas hold-up measurement jig;
And calculating the gas holdup rate according to the following equation for the ore slurry obtained in the transparent tubular portion.
α = {(V _G −V _L ) / V _G } × 100
α: Gas holdup rate (%)
V _G : Sum of bubble volume and solution volume of transparent tubular part (cm ³ )
V _L : Solution volume of transparent tubular part (cm ³ )