JP2019045362A - Wear evaluation method in piping system for transporting ore slurry, wear evaluation device, and ore wear measurement device - Google Patents

Abstract

To provide a wear evaluation method in piping system for transporting ore slurry capable of easily and quantitatively evaluating relative wear on each component in a piping system for transporting ore slurry, a wear evaluation device, and an ore wear measurement device used therefor.SOLUTION: The ore slurry transportation piping system is provided with multiple movement speed measuring means 11 at multiple points for measuring the movement speed of ore 52 included in ore slurry 50. Wear of a component positioned between the multiple points is evaluated on the basis of a difference of movement speed of the ore 52 measured by movement speed measuring means 11 at multiple points.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a slurry transport piping system for transporting ore mined in a subsea hydrothermal deposit or the like as an ore slurry mixed with a fluid such as sea water. The present invention relates to a wear evaluation method, a wear evaluation apparatus, and an ore wear degree measuring apparatus for simply evaluating relative wear of components.

When transporting ore mining ore excavated in a submarine hydrothermal deposit to an offshore mother ship or mining base, the ore is mixed with seawater to form an ore slurry, which is made of resin, rubber or metal piping and slurry. A method of pumping using a pump has been proposed (Non-Patent Document 1).
The ore immediately after mining has a relatively sharp corner, and the ore with the sharp corner collided with the inner wall of the piping and the components of the slurry pump by the water flow in the pipe during the slurry transport, The inner wall of the piping and the components of the slurry pump are gradually worn out. Therefore, in order to prevent pipes and slurry pump components from being damaged due to wear and becoming unusable during the operation of the mining and pumping system, the ore of the slurry transport piping system including the pipes and slurry pump must be It is important to know the wear characteristics of the slurry.

Non-Patent Document 2 shows the result of evaluating the wear characteristics of the inner wall of such piping by a slurry circulation type wear test apparatus 200 using a simulated ore as shown in FIG. A slurry circulation type wear test apparatus 200 shown in FIG. 9 puts a fixed amount of simulated ore from the upper part of a tank 201 filled with water to form a slurry, and this slurry is circulated in a pipe by a slurry pump 202. The connected wear amount measuring unit 203 performs a wear test on the inner wall of the piping. In FIG. 9, the arrows indicate the direction of slurry circulation. An electromagnetic flow meter 204 is provided on the downstream side of the wear amount measuring unit 203.
Since the slurry containing the simulated ore circulates in the piping of the slurry circulation type wear test apparatus 200, the simulated ore is worn and deteriorated due to many collisions with the inner wall of the piping after the start of the wear test. It can take off and become round or have a smaller particle size. For this reason, as shown in FIG. 10, the wear rate (wear level per unit time) of the test section piping is remarkably lowered with the passage of time.

On the other hand, the following methods have been proposed so far for classifying and evaluating the shape of stones or particles and the degree of wear (roundness, degree of corner removal).
Non-Patent Document 3 also includes the ratio (b / a) of the major axis (a axis) to the intermediate diameter (b axis) and the ratio (c / b) of the intermediate diameter to the minor axis (c axis). The shape of the stone is spherical (b / a> 2/3 and c / b> 2/3), disc-shaped (b / a> 2/3 and c / b <2/3), rod-shaped (b / a a <2/3 and c / b> 2/3) or oval (b / a <2/3 and c / b <2/3).
Non-Patent Document 4 describes that the circular polishing degree is classified into nine stages from 0.1 to 0.9 by comparison with the circular polishing impression diagram.
Non-Patent Document 5 describes that the hydrodynamic properties of coarse non-spherical particles centering on manganese nodules are studied experimentally on the free / interfering sedimentation velocity of single particles, the floating velocity of particles, and the like. Has been.

Patent Document 1 discloses a slurry average particle size measuring device that measures the sedimentation rate of a slurry using three photoelectric detectors.
Further, Patent Document 2 discloses a particle size distribution measuring apparatus that irradiates a lower portion of a sample cell with laser light and measures the particle size distribution from the spatial intensity distribution of the scattered light.
Patent Document 3 discloses that a surface image of a pipe in which a fluid having a temperature higher than air temperature flows is measured with an infrared camera to form a temperature image, and the pipe is being heated based on the temperature image. A pipe inspection device that detects pipe thinning by detecting and calculating the distribution of the rate of change in absolute temperature of the pipe surface is disclosed.

Japanese Patent Publication No. 7-81941 JP 2006-98212 A JP 2013-228306 A

Submarine hydrothermal deposit development plan Phase 1 Final Evaluation Report, Agency for Natural Resources and Energy, Ministry of Economy, Trade and Industry, Japan Petroleum Natural Gas and Metals Mineral Resources Organization (JOGMEC), Submarine Hydrothermal Deposit Development Committee (July 5, 2013) Day) Satoshi Takano et al .: Experimental study on the effect of ore deterioration during slurry transfer on pipe wear, Proceedings of the 2015 Spring Lecture Meeting of the Japan Society of Marine Science and Technology (2015) Zingg, Th. (1935): Beitrage zur Schotteranalysis. Min. Peterog. Mitt. Schweiz., 15, 39-140 Krumbein, W. C .: Measurement and geologicsignificance of shape and roundness of sedimentary particles.J. Sed. Petrol., 11, 64-72 (1941). Takayuki Saito et al .: Study on hydrodynamic properties of coarse non-spherical particles, Mining and Safety, Vol. 31, No. 3, pp. 137-145 (1985)

When the wear characteristics of the inner wall of the piping are quantitatively evaluated, as in Non-Patent Document 2, it is often experimentally evaluated by the slurry circulation type wear test apparatus 200 using a simulated ore. The assembly of the test equipment and the implementation of the wear test require a great deal of labor, time and cost, and as mentioned above, there is still a problem with the consistency with the degree of wear in the actual piping system, such as deterioration of the simulated ore due to wear. I'm leaving.
Further, in the slurry circulation type wear test using the slurry circulation type wear test apparatus 200 or the like, the number of times the ore passes through the slurry pump or elbow is significantly increased as the slurry circulates. Is divided into components such as a pump part, an elbow part, a straight pipe part, a hose part, etc., it is difficult to correctly evaluate the relative wear rate for each component.
Therefore, in order to correctly evaluate the relative wear rate of each component of the piping system for transporting ore slurry, the degree of wear of the ore (the degree of corner removal) that greatly affects the wear of each component is easily and quantified. Evaluation is important.

However, in the conventionally proposed methods for classifying and evaluating the shape of stones or particles and the degree of wear (roundness), the wear degree of ore that greatly affects the wear of components of the piping system is simple and quantitative. I can't find anything that evaluates to.
In the method of Non-Patent Document 3, the shape of the stone is classified into a spherical shape or a disk shape, but the shape of the stone has nothing to do with the degree of polishing, and for example, even if it is a stone having sharp corners, the shape is cubic. If it is close to, it will be classified as spherical.
Further, in the method of Non-Patent Document 4, the subjectivity of the classifier is entered when classifying, and the reproducibility is poor.
Further, in the method of Non-Patent Document 5, the relationship between the drag coefficient and sedimentation speed of particles and the shape factor S _f = c / √ (ab) of Particlesson is derived from particle sedimentation experiments. Similarly no relation to the circle of the shape factor S _f and particle Migakudo, wear of the particles even in the non-patent document 5 is not taken into account.
Moreover, the measuring apparatus described in Patent Document 1 measures the average particle diameter, and does not measure or evaluate the degree of wear of the ore.
Moreover, the measuring device described in Patent Document 2 measures the particle size distribution, and does not measure or evaluate the degree of wear of the ore.
Moreover, the inspection apparatus of patent document 3 detects the thinning of piping based on a temperature image, does not measure and evaluate the degree of wear of ore, and also uses the wear of ore to configure the piping. Nor is it an assessment of element wear.

  Therefore, the present invention relates to a wear evaluation method and wear evaluation apparatus for ore slurry transport piping system that can easily and quantitatively evaluate relative wear for each component such as piping and slurry pump constituting the slurry transport piping system. And it aims at providing the wear degree measuring apparatus of the ore used for it.

The wear evaluation method for the ore slurry transport piping system according to claim 1 is a method for evaluating the internal wear of the components of the ore slurry transport piping system, wherein the ore slurry transport piping system has a plurality of locations. Provided with a moving speed measuring means for measuring the moving speed of the ore contained in the ore slurry, based on the difference in the moving speed of the ore measured by the moving speed measuring means at a plurality of positions It is characterized by evaluating the wear of the steel.
According to the first aspect of the present invention, wear generated in each component such as pipes and slurry pumps included in the piping system for transporting ore slurry is easily and quantitatively determined based on differences in ore moving speeds at a plurality of locations. Can be evaluated. As a result, for example, it is possible to prioritize the components that should be monitored for wear even during operation of the piping system for transporting ore slurry, and to quantitatively determine the timing of inspection and replacement of components. Since the judgment standard is obtained, the reliability, operability, and safety of the entire piping system for transporting ore slurry are improved.

The invention according to claim 2 is characterized in that the wear rate of the component is evaluated when the wear of the component is evaluated.
According to the second aspect of the present invention, the wear of the component can be quantitatively evaluated based on the evaluation of the wear rate. The “wear rate” refers to the degree of wear per unit time.

According to the third aspect of the present invention, in evaluating the wear of the component, the wear of the component is estimated from the degree of wear of the ore determined from the difference in the moving speed of the ore.
According to this invention of Claim 3, wear of a component can be estimated based on the wear degree of an ore.

The invention according to claim 4 is characterized in that the wear of the component is evaluated based on a result obtained in advance of the relationship between the difference in the moving speed of the ore and the wear of the component.
According to the fourth aspect of the present invention, the wear of the component can be easily evaluated.

The present invention according to claim 5 is characterized in that the moving speed measuring means is provided in the upstream and downstream portions of the piping system for transporting ore slurry, and the wear of the components between the upstream portion and the downstream portion is evaluated. .
According to this invention of Claim 5, wear of the component of the whole piping system for ore slurry transport can be evaluated.

According to the sixth aspect of the present invention, the moving speed measuring means is provided in the intermediate portion of the piping system for transporting the ore slurry, and the component wear between the upstream portion and the intermediate portion and / or between the intermediate portion and the downstream portion. It is characterized by evaluating.
According to the sixth aspect of the present invention, the relative components of the first half part from the upstream part to the middle part of the ore slurry transport piping system and the second half part from the middle part to the downstream part are as follows. Wear can be evaluated.

The present invention according to claim 7 is characterized in that a moving speed measuring means is provided so as to sandwich a plurality of constituent elements of the ore slurry transport piping system on the upstream side and the downstream side, and the wear of each constituent element is evaluated. And
According to the present invention described in claim 7, the wear of each component can be relatively evaluated.

The present invention according to claim 8 uses a dedicated measuring ore that is more easily worn than the actual ore contained in the ore slurry as the ore, and puts the measuring ore into the ore slurry transport piping system to evaluate the wear. It is characterized by doing.
According to the eighth aspect of the present invention, the relative wear of the components can be more reliably evaluated.

The present invention according to claim 9 is configured to form a plurality of locations of the ore slurry transport piping system as a transparent photographing pipe, photograph the ore moving in the transparent photographing pipe by a high speed camera provided as a moving speed measuring means, The moving speed is measured from the photographed video.
According to this invention of Claim 9, the moving speed of an ore can be acquired simply.

The present invention according to claim 10 is characterized in that, in measuring the moving speed, the moving speed is measured only from a stroke in which the ore floats and moves without contacting the inner surface of the transparent photographing pipe.
According to this invention of Claim 10, the moving speed of an ore can be acquired more correctly.

The present invention according to claim 11 is characterized in that in evaluating the wear of the components located between a plurality of locations, the evaluation is performed in a dedicated operation mode different from the actual operation of the piping system for transporting ore slurry. And
According to the eleventh aspect of the present invention, the evaluation result in the dedicated operation mode can be reflected in the actual operation.

In the wear evaluation apparatus of the ore slurry transport piping system corresponding to claim 12, the ore measured by the moving speed measuring means provided at a plurality of locations in the ore slurry transport piping system and the moving speed measuring device at the plurality of locations. Ore wear degree estimating means for estimating the wear degree of the ore based on the moving speed of the ore, and component wear evaluating means for evaluating the wear of the component based on the estimation result of the ore wear degree by the ore wear degree estimating means. It is characterized by having.
According to this invention of Claim 12, the abrasion which arises in each component of the piping system for ore slurry transport can be evaluated simply and quantitatively based on the estimation result of the wear degree of an ore. Thereby, for example, even during operation of the piping system for transporting the ore slurry, it becomes easy to rank the constituent elements whose wear status should be monitored.

According to a thirteenth aspect of the present invention, there is further provided a wear comparing means for comparing the evaluation results of the wear of each of the plurality of constituent elements by the constituent element wear evaluating means.
According to the thirteenth aspect of the present invention, it is possible to more accurately rank the constituent elements whose wear status should be monitored.

The present invention according to claim 14 further includes display means for displaying at least an evaluation result of the component wear evaluation means.
According to the fourteenth aspect of the present invention, the operator can easily grasp the wear state of the component.

In the ore wear degree measuring apparatus corresponding to claim 15, the moving speed measuring means provided in the ore slurry transport piping system, and the speed for storing the relationship between the ore moving speed and the ore wear degree determined in advance. A wear degree storage means and a wear degree deriving means for deriving the wear degree of the ore by applying the movement speed measured by the movement speed measurement means to the speed / wear degree storage means.
According to the present invention described in claim 15, the degree of wear of the ore can be derived easily and quantitatively.

The present invention described in claim 16 uses a high-speed camera as the moving speed measuring means, and provides two high-speed cameras at a predetermined distance with respect to the transparent photographing pipe provided in the ore slurry transport pipe system. Features.
According to the sixteenth aspect of the present invention, it is possible to calculate the moving speed of the ore based on the total moving distance from the position corresponding to the one high-speed camera to the position corresponding to the other high-speed camera. it can. Moreover, the moving speed of the ore can be calculated based on the moving stroke of the ore within the angle of view of one high-speed camera or the other high-speed camera.

The present invention according to claim 17 is characterized in that the two high-speed cameras photograph the ore in synchronization.
According to the seventeenth aspect of the present invention, the photographing timings of the two high-speed cameras can be matched.

The present invention according to claim 18 is characterized in that the transparent photographing pipe is provided with a scale so as to be within the photographing range of the high-speed camera.
According to the 18th aspect of the present invention, it is easy to grasp the moving distance of the ore based on the scale contained in the video.

  According to the wear evaluation method for ore slurry transport piping system of the present invention, the wear generated in each component such as piping and slurry pump included in the ore slurry transport piping system is based on the difference in the ore moving speed at a plurality of locations. Can be easily and quantitatively evaluated. As a result, for example, it is possible to prioritize the components that should be monitored for wear even during operation of the piping system for transporting ore slurry, and to quantitatively determine the timing of inspection and replacement of components. Since the judgment standard is obtained, the reliability, operability, and safety of the entire piping system for transporting ore slurry are improved.

  In evaluating the wear of the component, when evaluating the wear rate of the component, the wear of the component can be quantitatively evaluated based on the evaluation of the wear rate.

  In addition, when evaluating component wear, when estimating component wear from ore wear obtained from the difference in ore movement speed, estimate component wear based on ore wear. can do.

  Further, when the wear of the component is evaluated based on the result of obtaining the relationship between the difference in the moving speed of the ore and the wear of the component in advance, the wear of the component can be easily evaluated.

  In addition, when moving speed measuring means is provided in the upstream and downstream parts of the ore slurry transport piping system and the wear of the components between the upstream part and the downstream part is evaluated, The wear of the component can be evaluated.

  In addition, when moving speed measuring means is provided in the intermediate part of the ore slurry transport piping system, and / or when evaluating the wear of the components between the upstream part and the intermediate part and / or between the intermediate part and the downstream part, It is possible to evaluate the wear of the relative components of the first half part from the upstream part to the middle part of the ore slurry transport piping system and the second half part from the middle part to the downstream part.

  In addition, when moving speed measuring means is provided so that a plurality of components of the ore slurry transport piping system are sandwiched between the upstream side and the downstream side, when evaluating the wear of each component, the wear of each component is Each can be evaluated relatively.

  In addition, as an ore, a dedicated measurement ore that is more easily worn than the actual ore contained in the ore slurry is used. Relative wear can be more reliably evaluated.

  Also, multiple locations in the ore slurry transport piping system are configured as transparent photographic piping, and the ore moving through the transparent photographic piping is photographed by a high-speed camera provided as a moving speed measuring means, and the moving speed is taken from the photographed image. When measuring the ore, the moving speed of the ore can be easily obtained.

  Also, when measuring the moving speed, if the moving speed is measured only from the process in which the ore floats and moves without contacting the inner surface of the transparent shooting pipe, the moving speed of the ore should be obtained more accurately. Can do.

  Also, when evaluating wear of components located between multiple locations, when evaluating in a dedicated operating mode different from the actual operation of the piping system for ore slurry transport, evaluation in the dedicated operating mode The result can be reflected in actual operation.

  Further, according to the ore slurry transport piping system wear evaluation apparatus of the present invention, wear generated in each component of the ore slurry transport piping system is evaluated simply and quantitatively based on the estimation result of the ore wear degree. it can. Thereby, for example, even during operation of the piping system for transporting the ore slurry, it becomes easy to rank the constituent elements whose wear status should be monitored.

  In addition, when the apparatus further includes a wear comparison means for comparing the evaluation results of the wear of each of the plurality of components by the component wear evaluation means, it is possible to more accurately rank the components that should be monitored mainly for wear conditions. Can be done.

  In addition, when it is further provided with a display means for displaying at least the evaluation result of the component wear evaluation means, the operator can easily grasp the wear status of the component.

  Further, according to the ore wear degree measuring apparatus of the present invention, the ore wear degree can be derived easily and quantitatively.

  In addition, when a high-speed camera is used as the moving speed measurement means and two high-speed cameras are provided at a predetermined distance from the transparent photographing pipe provided in the ore slurry transport pipe system, The moving speed of the ore can be calculated based on the entire moving process from the position corresponding to the speed camera to the position corresponding to the other high speed camera. Moreover, the moving speed of the ore can be calculated based on the moving stroke of the ore within the angle of view of one high-speed camera or the other high-speed camera.

  In addition, the two high-speed cameras can synchronize the shooting timings of the two high-speed cameras when shooting the ore in synchronization.

  In addition, when the scale is installed in the transparent photographing pipe so as to be within the photographing range of the high-speed camera, it becomes easy to grasp the moving distance of the ore based on the scale contained in the video.

Schematic of a wear evaluation apparatus used in a wear evaluation method for a piping system for transporting ore slurry according to an embodiment of the present invention. The figure which shows the example of arrangement of the wear degree measuring device of the ore Schematic diagram of an ore wear degree measuring apparatus used in a wear evaluation method and wear evaluation apparatus for an ore slurry transport piping system according to another embodiment of the present invention. Top view of the ore wear degree measuring device A photograph taken with a high-speed camera of the transparent pipe of the ore wear degree measuring device Appearance photo of the ore The figure which shows the result which arranged relative speed with respect to slurry flow velocity of the ore by ore weight The figure which shows the result which arranged relative speed with respect to slurry flow velocity of the ore by ore weight Schematic diagram of slurry circulation type wear test equipment The figure which shows the relationship between the ore slurry circulation time and the pipe wear rate in the wear test using the same slurry circulation type wear test device

Hereinafter, a wear evaluation method, a wear evaluation apparatus, and an ore wear degree measurement apparatus for an ore slurry transport piping system according to an embodiment of the present invention will be described.
FIG. 1 is a schematic view of a wear evaluation apparatus used in a wear evaluation method for an ore slurry transport piping system according to the present embodiment, and FIG. 2 is a diagram showing an arrangement example of an ore wear degree measurement apparatus.

The piping system for transporting ore slurry includes constituent elements such as an ore slurry input tank 1, an ore slurry recovery tank 2, a pipe 3, and a slurry pump 4.
One end of the pipe 3 is connected to the charging tank 1, and the other end of the pipe 3 is connected to the recovery tank 2. The pipe 3 has a first elbow part 3A and a second elbow part 3B as two bent portions. The slurry pump 4 is connected to a straight pipe portion located between the first elbow part 3A and the second elbow part 3B. Further, between the slurry pump 4 and the second elbow part 3B, a long and long pipe part 3C in which a long straight pipe continues is provided.
In addition, the vertical positional relationship of each component in the ore slurry transport piping system is irrelevant to the vertical positional relationship of each component in the actual piping system. Further, the ore slurry input tank 1 and the ore slurry recovery tank 2 may not be provided, and the ore slurry transport piping system is not limited to the configuration shown in FIGS.
The fluid 51 such as seawater and the ore 52 charged into the charging tank 1 become ore slurry 50 and flow inside the pipe 3 and flow into the recovery tank 2.

  The ore slurry transport piping system wear evaluation device includes an ore wear degree measuring device 10 for measuring the wear degree of the ore 52, and components such as the pipe 3 and the slurry pump 4 based on the measurement results obtained by the wear degree measuring device 10. The component wear evaluation means 20 for evaluating the wear of the component, the wear comparison means 30 for comparing the evaluation results by the component wear evaluation means 20, and the display means 40 for displaying at least the evaluation results of the component wear evaluation means 20. .

The wear degree measuring apparatus 10 includes a moving speed measuring means 11 that measures the moving speed of the ore 52 included in the ore slurry 50 and an ore wear degree estimating means 12 that estimates the wear degree of the ore 52 based on the moving speed of the ore 52. And have.
In quantitatively evaluating the wear degree of the ore 52 using the wear degree measuring apparatus 10, a plurality of measurement positions for measuring the moving speed of the ore 52 included in the ore slurry 50 transported in the pipe are set. The moving speed measuring means 11 is provided at a plurality of set measurement positions.
The measurement result of the moving speed of the ore 52 at a plurality of locations measured by the moving speed measuring means 11 is sent to the ore wear degree estimating means 12. The moving speed of the ore 52 is preferably a relative speed of the ore 52 with respect to the slurry flow rate.
The fluid resistance of the ore 52 varies depending on the degree of wear (mainly how the corners are removed). Therefore, the ore wear degree estimation means 12 that has received the measurement result of the moving speed of the ore 52 can determine the wear degree of the ore 52 from the difference in the moving speed of the ore 52 at the measurement location.
The degree of wear of the ore 52 estimated by the ore wear degree estimation means 12 is sent to the component wear evaluation means 20.
Instead of the ore wear degree estimating means 12, a speed / wear degree storage means for storing the relationship between the movement speed of the ore 52 and the wear degree of the ore 52 obtained in advance, and the ore measured by the movement speed measuring means 11. Wear degree deriving means for deriving the wear degree of the ore 52 by applying the moving speed of 52 to the speed / wear degree storage means may be provided, and thereby the wear degree of the ore 52 may be derived.

The inner wall of the piping 3 of the slurry transport piping system and the components of the slurry pump 4 are mostly made of metal, resin, or rubber. Generally, the hardness of the ore 52 is smaller than the hardness of the ore 52. When the inner wall of the pipe 3 and the components of the slurry pump 4 collide and wear, the inner wall of the pipe 3 and the components of the slurry pump 4 are worn at the same time.
Therefore, the component wear evaluation means 20 can be obtained by quantitatively evaluating the wear degree of the ore 52 contained in the ore slurry 50 at the location where the slurry transport piping system is present as described above using the wear degree measuring apparatus 10. The wear of components such as the inner wall of the pipe 3 and the components of the slurry pump 4 arranged on the upstream side of the part can be evaluated based on the degree of wear of the ore 52. Thereby, for example, even when the ore slurry transport piping system is in operation, it is possible to prioritize the components whose wear status should be monitored. In addition, since the wear of the component is obtained as the degree of wear by, for example, integrating the wear rate with time, a quantitative judgment standard for determining the component inspection and replacement timing can be obtained. The reliability, operability and safety of the entire piping system are improved.

In evaluating the wear of a component, when evaluating the degree of wear or the wear rate of the component, the wear of the component can be simply and quantitatively evaluated based on the evaluation of the degree of wear or the wear rate. it can.
Further, the wear of the component can be evaluated based on the result obtained in advance of the relationship between the difference in the moving speed of the ore 52 and the wear of the component. In this case, the wear of the component can be more easily evaluated.
Further, in evaluating the wear of the components, the evaluation can be performed in a dedicated operation mode different from the actual operation of the piping system for transporting the ore slurry. In this case, the evaluation result in the dedicated operation mode can be reflected in the actual operation.

The evaluation result by the component wear evaluation means 20 is sent to the wear comparison means 30 and the display means 40.
The wear comparison means 30 that has received the wear evaluation result of the component compares the wear evaluation result of each component. As a result, it is possible to more accurately rank the constituent elements whose wear status should be monitored. Moreover, a quantitative numerical value is shown, which can be used for the judgment of the operator.
The display means 40 is, for example, a display or a display board, and displays the evaluation result of the wear of the constituent elements. This makes it easier for the operator to grasp the wear state of the component. Further, the relative wear of each component evaluated by the wear comparison means 30 may be displayed.

In addition, the ore 52 thrown into the charging tank 1 can use an actual ore other than a simulated ore. Moreover, a simulated ore and an actual ore can be mixed and used.
In the actual ore slurry transport piping system, the ore slurry 50 does not circulate in the piping unlike the slurry circulation type wear test apparatus 200 shown in FIG. Apart from that, the degree of wear of the ore during transport seems to be relatively small. Therefore, a dedicated measuring ore that is more easily worn than the actual ore is prepared as the simulated ore 52, and this is used to intentionally increase the degree of wear of the simulated ore 52 in the slurry. By measuring the degree of wear, it is possible to reliably evaluate the relative wear rate of each component constituting the ore slurry transport piping system.
Dedicated measuring ores that are more likely to wear than actual ores include limestone, serpentinite, shale, slate, basalt, and other rocks that are relatively brittle to impacts and are crushed into crushed stones. In consideration of the particle size distribution of the actual ore, it is possible to use a material that is appropriately arranged with a sieve or the like. In addition, the number and shape of the corners are determined in advance so that the change in fluid resistance due to the difference in the degree of wear (roundness) is significant (for example, a cube or a rectangular parallelepiped having eight corners, or many corners). The same by sintering fine mineral powder materials at high temperature and high pressure, or molding resin materials and metal materials using a special mold or 3D printer. A large number of shape measuring ores can be produced and used as the simulated ore 52.

  The measurement position in the present embodiment is set between the first measurement position α set in the pipe 3 between the charging tank 1 and the first elbow part 3A, and between the first elbow part 3A and the slurry pump 4. The second measurement position β, the third measurement position γ set between the slurry pump 4 and the long piping part 3C, the fourth measurement position δ set between the long piping part 3C and the second elbow part 3B, the second Although there are a total of five fifth measurement positions ε set between the elbow part 3B and the collection tank 2, it is not always necessary to provide the moving speed measurement means 11 at all measurement positions. As in the above installation example, a location where the moving speed measuring means 11 is provided may be selected according to the component for which wear is to be evaluated.

[First installation example]
As shown in FIG. 2A, the first installation example is an example in which the moving speed measuring means 11 is provided at the first measurement position α and the fifth measurement position ε, that is, the upstream part of the piping system for ore slurry transport This is an example in which the moving speed measuring means 11 is provided in the downstream portion.
The ore wear degree estimating means 12 is used to measure the moving speed of the ore 52 measured by the moving speed measuring means 11 provided at the first measurement position α and the ore measured by the moving speed measuring means 11 provided at the fifth measurement position ε. Based on the moving speed of 52, the degree of wear of the ore 52 is estimated.
Then, by using the component wear evaluation means 20, the difference between the degree of wear of the ore 52 at the first measurement position α and the degree of wear of the ore 52 at the fifth measurement position ε is compared, so that the charging tank 1 and the recovery tank 1 are recovered. It is possible to evaluate the wear of the constituent elements of the entire piping system for transporting ore slurry connecting the industrial tank 2.

[Second installation example]
As shown in FIG. 2B, the second installation example is an example in which moving speed measuring means 11 is provided at the first measurement position α, the third measurement position γ, and the fifth measurement position ε, that is, for transporting ore slurry. This is an example in which a moving speed measuring means 11 is provided in an intermediate portion in addition to an upstream portion and a downstream portion of a piping system.
The ore wear degree estimating means 12 is used to measure the moving speed of the ore 52 measured by the moving speed measuring means 11 provided at the first measurement position α and the ore measured by the moving speed measuring means 11 provided at the third measurement position γ. The degree of wear of the ore 52 is estimated based on the moving speed of 52 and the moving speed of the ore 52 measured by the moving speed measuring means 11 provided at the fifth measurement position ε.
Then, using the component wear evaluation means 20, the difference between the degree of wear of the ore 52 at the first measurement position α and the degree of wear of the ore 52 at the third measurement position γ is compared, and at the third measurement position γ. By comparing the difference between the degree of wear of the ore 52 and the degree of wear of the ore 52 at the fifth measurement position ε, the first half of the ore slurry transport pipe (from the charging tank 1 to the slurry pump 4) and the second half (long) It is possible to evaluate the wear of the relative components of the piping section 3C to the recovery tank 2).
In addition, by using the component wear evaluation means 20, by comparing the difference between the degree of wear of the ore 52 at the first measurement position α and the degree of wear of the ore 52 at the fifth measurement position ε, the first installation example and Similarly, the wear of the entire ore slurry transportation piping system can be evaluated.

[Third installation example]
In the third installation example, as shown in FIG. 2 (c), the first measurement position α to the fifth measurement position ε are arranged so as to sandwich the constituent elements of the ore slurry transport piping system from the upstream side and the downstream side. This is an installation example in which moving speed means 11 is provided for all.
The ore wear degree estimation means 12 is used to measure the moving speed of the ore 52 measured by the moving speed measuring means 11 provided at the first measurement position α and the ore measured by the moving speed measuring means 11 provided at the second measurement position β. 52, the moving speed of the ore 52 measured by the moving speed measuring means 11 provided at the third measuring position γ, and the moving speed of the ore 52 measured by the moving speed measuring means 11 provided at the fourth measuring position δ. Then, the degree of wear of the ore 52 is estimated based on the moving speed of the ore 52 measured by the moving speed measuring means 11 provided at the fifth measurement position ε.
The wear rate of the first elbow portion 3A is calculated from the difference between the degree of wear of the ore 52 at the first measurement position α and the degree of wear of the ore 52 at the second measurement position β by using the component wear evaluation means 20. The wear rate of the components of the slurry pump 4 is determined from the difference between the wear degree of the ore 52 at the second measurement position β and the wear degree of the ore 52 at the third measurement position γ. The wear rate of the long pipe portion 3C is determined from the difference between the wear degree of the ore 52 at the fourth measurement position δ, and the difference between the wear degree of the ore 52 at the fourth measurement position δ and the wear degree of the ore 52 at the fifth measurement position ε. The wear rate of the second elbow part 3B can be relatively evaluated.
In addition, by using the component wear evaluation means 20, by comparing the difference between the degree of wear of the ore 52 at the first measurement position α and the degree of wear of the ore 52 at the fifth measurement position ε, the first installation example and Similarly, the wear of the entire ore slurry transportation piping system can be evaluated. Furthermore, the difference between the degree of wear of the ore 52 at the first measurement position α and the degree of wear of the ore 52 at the third measurement position γ is compared using the component wear evaluation means 20, and at the third measurement position γ. By comparing the difference between the degree of wear of the ore 52 and the degree of wear of the ore 52 at the fifth measurement position ε, the relative wear of the first half part and the second half part of the ore slurry transport pipe is the same as in the second installation example. Can also be evaluated.

  As described above, by appropriately selecting a place where the moving speed measuring means 11 is installed, it is possible to appropriately evaluate the wear of the component to be evaluated.

Next, the relationship between the ore moving speed and the degree of wear will be described.
FIG. 3 is a schematic view of an ore wear degree measuring apparatus used in a wear evaluation method and wear evaluation apparatus for an ore slurry transport piping system according to another embodiment of the present invention. FIG. 3 (a) is a front view, FIG. (B) is a perspective view. Thick arrows indicate the circulation direction of the ore slurry. Note that members having the same functions as those in the above-described embodiment are denoted by the same reference numerals and description thereof is omitted.

The wear degree measuring apparatus 10 shown in FIG. 3 is applied to the slurry circulation type wear test apparatus 100, and measures the moving speed of the ore 52 contained in the ore slurry 50 flowing in the slurry circulation type wear test apparatus 100. The pipe at the measurement position is a transparent photographing pipe 13. Further, a high-speed camera is used as the moving speed measuring means 11 provided in the transparent photographing pipe 13 (measurement position), and an electromagnetic flow meter 15 for measuring the average flow velocity of the ore slurry 50 is provided on the downstream side of the transparent photographing pipe 13. The transparent photographing pipe 13 is a pipe made transparent in order to enable photographing inside the pipe by the high-speed camera 11 installed outside the pipe.
The ore 52 moving in the transparent photographing pipe 13 was photographed by the high-speed camera 11, the moving speed of the ore 52 was calculated from the photographed image (image), and the relationship with the degree of wear was examined.
In the present invention, the moving speed measuring means 11 is provided at a plurality of locations in the slurry transport piping system, but here the moving speed measuring means 11 is provided only at one location for convenience.

The slurry circulation type wear test apparatus 100 includes an input tank (buffer tank) 1 filled with water as a fluid 51, a pipe 3 arranged in an annular shape, and a slurry pump 4 connected to the pipe 3.
The transparent photographing pipe 13 is connected in a form in which a part of the straight pipe portion of the pipe 3 is replaced, and forms a part of the pipe 3. The transparent photographing pipe 13 is, for example, a transparent vinyl chloride pipe having an inner diameter of 80 mm.
The high-speed camera 11 is provided facing the transparent photographing pipe 13. The high-speed camera 11 includes two units, a first high-speed camera 11A and a second high-speed camera 11B. The shutter speed of the first high-speed camera 11A and the second high-speed camera 11B is 1/4000 sec, and the frame rate is 150 fps.
The input tank 1 is installed on the upstream side of the transparent photographing pipe 13. The ore 52 is charged into the charging tank 1 filled with water to form an ore slurry 50, and the ore slurry 50 is sent out by the slurry pump 4 to circulate in the pipe 3 and the transparent photographing pipe 13.

FIG. 4 is a top view of the transparent photographing pipe and the high speed camera shown in FIG. 3, and shows the arrangement of the transparent photographing pipe and the high speed camera. In addition, the thick arrow has shown the circulation direction of the ore slurry. FIG. 5 is a photograph taken with a high-speed camera as the ore moves in the transparent photographing pipe, FIG. 5 (a) is a photograph taken with the first high-speed camera, and FIG. 5 (b) is a second photograph. It is a photograph taken with a high-speed camera.
As shown in FIG. 4, the first high speed camera 11 </ b> A is provided on the upstream end side of the transparent photographing pipe 13, and the second high speed camera 11 </ b> B is provided on the downstream end side of the transparent photographing pipe 13. The distance L between the center of the photographing lens of the first high speed camera 11A and the center of the photographing lens of the second high speed camera 11B is 435 mm. By arranging two high-speed cameras 11 at a predetermined distance in this way, the entire ore 52 moves from the position corresponding to the first high-speed camera 11A to the position corresponding to the second high-speed camera 11B. The speed of the ore 52 can be calculated based on the stroke. Moreover, the speed of the ore 52 can be calculated based on the travel of the ore 52 within the angle of view of the first high-speed camera 11A or the second high-speed camera 11B.
For example, a scale 14 with a scale in mm is pasted on the transparent photographing pipe 13. The scale 14 is affixed so as to be located in the photographing range of the high-speed camera 11 from the upstream end side to the downstream end side. Thereby, as shown in FIG. 5, the ore 52 and the scale 14 can be accommodated in the same photograph, and the movement distance of the ore 52 can be easily grasped.

  FIG. 6 is a photograph of the appearance of the simulated ore charged into the slurry circulation type wear test apparatus. The size of the simulated ore is crushed stone 5 (from Nishijima, Himeji City, Hyogo Prefecture), the particle size is about 10 to 20 mm, and the rock type is rhyolite.

In examining the relationship between the ore moving speed and the degree of wear, first, the simulated ore 52 was divided into two groups, Group A and Group B.
Group A is a set of pre-circulation ores 52a randomly extracted from a plurality of simulated ores 52 in an initial state before circulating the slurry circulation type wear test apparatus 100.
Group B is a group of post-circulation ores 52b randomly extracted from a plurality of ores 52 after being circulated for 90 minutes from the initial state using the slurry circulation type wear test apparatus 100.
In groups A and B, three types having different particle size ranges (large particle size, medium particle size, and small particle size) are mixed.

FIGS. 6A to 6C are photographs of the pre-circulation ore 52a (group A). FIG. 6A shows the pre-recycled ore 52a having a large particle size (about 19 to 22 mm), and FIG. 6B shows the pre-recycle ore 52a having a medium particle size (about 13 to 16 mm). ) Shows the ore 52a before circulation having a small particle size (about 8 to 11 mm). It can be seen that the pre-circulation ore 52a has a sharp corner at any particle size.
The alphabet displayed on the surface of the pre-circulation ore 52a is irrelevant to the group name.

6D to 6F are photographs of post-circulation ore 52b (group B). 6 (d) shows a post-circulation ore 52b with a large particle size (about 19-22 mm), FIG. 6 (e) shows a post-circulation ore 52b with a medium particle size (about 13-16 mm), and FIG. ) Shows the ore 52b after circulation having a small particle size (about 8 to 11 mm). The post-circulation ore 52b has rounded corners due to collisions with the inner wall of the pipe 3 and the components of the slurry pump 4 during circulation at any particle size (increased roundness). I understand that.
Note that the alphabet displayed on the surface of the post-circulation ore 52b is irrelevant to the group name.

Next, the pre-circulation ore 52a of group A was put into the charging tank 1 at a time, and the high-speed camera 11 photographed the movement of the pre-circulation ore 52a in the transparent photographing pipe 13.
The shooting by the first high-speed camera 11A and the second high-speed camera 11B is synchronized, and after the shooting is completed, the scale 14 is used to move the piping of the pre-circulation ore 52a from the moving distance in the pipe axial direction of the pre-circulation ore 52a and the number of shooting frames. The axial direction moving speed was calculated, and this pipe axial direction moving speed was recorded as data of the ore 52a before circulation.
By photographing the first high speed camera 11A and the second high speed camera 11B in synchronization, the photographing timings of the two high speed cameras 11 can be matched. Note that the synchronization method is executed by outputting a synchronization signal from the first high-speed camera 11A, and the second high-speed camera 11B shooting according to the synchronization signal.
Moreover, the weight of the ore 52a before circulation was measured, and the measurement result was included in the data of the ore 52a before circulation.

Similarly, the post-circulation ore 52b of group B was introduced into the input tank 1 at once, and the state in which the post-circulation ore 52b moves in the transparent photographing pipe 13 was photographed by the high-speed camera 11.
The shooting by the first high-speed camera 11A and the second high-speed camera 11B is synchronized, and after completion of the shooting, the piping of the post-circulation ore 52b is calculated from the movement distance in the pipe axial direction of the post-circulation ore 52b and the number of frames by using the scale 14. The axial movement speed was calculated, and this pipe axial movement speed was recorded as data of the ore 52b after circulation.
Moreover, the weight of the ore 52b after circulation was measured, and the measurement result was included in the data of the ore 52b after circulation.

FIG.7 and FIG.8 is a figure which shows the result of having arranged the relative speed with respect to the slurry flow rate of an ore with the ore weight. The horizontal axis is the ore weight (g), the vertical axis is the relative velocity of the ore (m / sec), the white rhombus (◇) is the measurement result of the pre-circulation ore 52a (group A) with a small particle size, Is the measurement result of the pre-recycled ore 52a (group A) in the particle size, the white square (□) is the measurement result of the pre-recycled ore 52a (group A) with a large particle size, and the black diamond (♦) is the recirculation with a small particle size Measurement results of post ore 52b (group B), black circles (●) are measurement results of post-circulation ore 52b (group B) in the particle size, black squares (■) are post-circulation ore 52b (group B) having a large particle size The measurement results are shown. The slurry flow rate during photographing was an average of 3.09 m / sec. Further, the pre-circulation ore 52a (group A) or the post-circulation ore 52b (group B) charged into the pipe 3 was all collected after completion of the respective photographing.
FIG. 7 shows a case where the relative speed of the ore 52 is calculated from the entire travel stroke from the first high-speed camera 11A to the second high-speed camera 11B, and the ore 52 is in the inner wall of the transparent photographing pipe 13 during this stroke. The case where it bounces by colliding with or moves while rubbing the bottom of the inner wall is included.
On the other hand, FIG. 8 shows that the ore 52 collides with the inner wall of the transparent photographing pipe 13 and moves while rubbing the bottom of the inner wall within the angle of view of the first high-speed camera 11A or the second high-speed camera 11B. This shows a case where the moving speed of the ore 52 is calculated only from the stroke that has not been performed, that is, the stroke in which the ore 52 floats and moves in the fluid.
In FIG. 7, except for the case of the ore 52 having a small particle size (light), there is a significant correlation between the relative velocity of the ore 52 and the wear degree of the ore 52 (difference between groups A and B). If the ore 52 collides with the inner wall of the transparent photographing pipe 13 and moves while rubbing the bottom of the inner wall, the moving stroke used for calculating the speed of the ore 52 includes It can be seen that the degree of wear may not be evaluated well.
On the other hand, when FIG. 8 is seen, the relative speed of the group A (before circulation) is the group B (before circulation) at any particle size (weight) except that there is an exception in the result of the ore 52 having a small particle size (light). When the moving speed of the ore 52 is calculated only from the stroke in which the ore 52 floats and moves in the fluid, the wear of the ore 52 is determined from the relative speed of the ore 52 with respect to the slurry flow rate. It can be seen that the degree can be evaluated and classified better.

  Usually, it is difficult to quantitatively evaluate the degree of wear of the ore 52 contained in the ore slurry 50 transported in the actual piping, but as described above, the transparent photographing provided in the middle of the ore slurry transporting piping system. By configuring the ore wear degree measuring apparatus 10 using the pipe 13 and the two high-speed cameras 11 or the like, the wear degree of the ore 52 contained in the ore slurry 50 flowing in the actual pipe 3 can be transported. It is possible to evaluate quantitatively without stopping.

  In the ore wear degree measuring apparatus 10 shown in FIG. 3, the moving speed of the ore 52 is measured using the transparent photographing pipe 13 and the two high-speed cameras 11, and the ore slurry 50 is used using the electromagnetic flow meter 15. However, the moving speed of the ore 52 or the average flow speed of the ore slurry 50 may be measured using other methods and means. For example, the average moving speed of the ore 52 can be measured using a Doppler type ultrasonic flowmeter, or the moving speed of the ore 52 can be measured by appropriately combining the transparent photographing pipe 13 and a laser displacement meter. it can.

  The wear evaluation method, wear evaluation apparatus, and ore wear degree measuring apparatus for ore slurry transport piping system of the present invention can easily and quantitatively evaluate the wear generated in each component of the ore slurry transport piping system. It can be applied to an actual ore slurry transport piping system. Thereby, the reliability, operability, and safety of the entire piping system for ore slurry transportation can be improved. It can also be applied to an ore slurry transport piping system for wear testing.

10 Wear degree measuring device 11 Moving speed measuring means (high speed camera)
12 Ore wear degree estimation means 13 Transparent photographing pipe 14 Scale 20 Component wear evaluation means 30 Wear comparison means 40 Display means 50 Ore slurry 52 Ore (simulated ore, actual ore, ore for measurement)

Claims (18)

  A method for evaluating internal wear of components of an ore slurry transport piping system, wherein a moving speed measuring means for measuring the moving speed of the ore contained in the ore slurry is provided at a plurality of locations of the ore slurry transport piping system. The ore slurry is characterized in that the wear of the component located between the plurality of locations is evaluated based on a difference in the plurality of locations of the movement speed of the ore measured by the moving speed measuring means. Wear evaluation method for transportation piping systems.   The wear evaluation method for an ore slurry transport piping system according to claim 1, wherein the wear rate of the component is evaluated in evaluating the wear of the component.   3. The wear of the component is estimated from the degree of wear of the ore obtained from the difference in the moving speed of the ore in evaluating the wear of the component. 4. The wear evaluation method of the piping system for ore slurry transport described in 1.   4. The wear of the component is evaluated based on a result obtained in advance of a relationship between the difference in the moving speed of the ore and the wear of the component. The wear evaluation method of the piping system for ore slurry transportation according to item 1.   The said moving speed measuring means is provided in the upstream part and downstream part of the said ore slurry transport piping system, The said abrasion of the said component between the said upstream part and the said downstream part is evaluated. The wear evaluation method of the piping system for ore slurry transport according to any one of claims 1 to 4.   The moving speed measuring means is provided in an intermediate part of the ore slurry transport piping system, and the wear of the component between the upstream part and the intermediate part and / or between the intermediate part and the downstream part is reduced. The method for evaluating wear of a piping system for ore slurry transportation according to claim 5, wherein the evaluation is performed.   The moving speed measuring means is provided so as to sandwich the plurality of components of the ore slurry transport piping system on the upstream side and the downstream side, respectively, and the wear of each of the components is evaluated. The wear evaluation method for a piping system for transporting ore slurry according to any one of claims 1 to 4.   As the ore, a dedicated measuring ore that is more easily worn than the actual ore contained in the ore slurry is used, the measuring ore is put into the ore slurry transport piping system, and the wear is evaluated. The wear evaluation method of the piping system for ore slurry transport according to any one of claims 1 to 7.   The plurality of locations of the ore slurry transport piping system are configured as transparent photographing piping, and the ore moving through the transparent photographing piping is photographed by a high-speed camera provided as the moving speed measuring means, and the photographed image The method for evaluating wear of a piping system for ore slurry transportation according to any one of claims 1 to 8, characterized in that the moving speed is measured.   10. The ore slurry according to claim 9, wherein in measuring the moving speed, the moving speed is measured only from a stroke in which the ore floats and moves without contacting the inner surface of the transparent photographing pipe. Wear evaluation method for transportation piping systems.   2. The evaluation of the wear of the component located between the plurality of locations is performed in a dedicated operation mode different from the actual operation of the piping system for transporting the ore slurry. The wear evaluation method of the piping system for ore slurry transport according to any one of claims 1 to 10.   It is an abrasion evaluation apparatus used for the abrasion evaluation method of the piping system for ore slurry transport of any one of Claims 1-11, Comprising: The said movement provided in the said several places of the said piping system for ore slurry transport The speed measuring means, the ore wear degree estimating means for estimating the wear degree of the ore based on the moving speed of the ore measured by the moving speed measuring means at the plurality of locations, and the ore wear degree estimating means A wear evaluation apparatus for an ore slurry transport piping system, comprising: a component wear evaluation means for evaluating the wear of the component based on the estimation result of the degree of wear of the ore.   The wear evaluation of the piping system for ore slurry transport according to claim 12, further comprising wear comparison means for comparing the wear evaluation results of each of the plurality of components by the component wear evaluation means. apparatus.   The wear evaluation apparatus for an ore slurry transport piping system according to claim 12 or 13, further comprising display means for displaying at least an evaluation result of the component wear evaluation means.   The ore wear degree measuring apparatus using the moving speed measuring means used in the wear evaluation method for a piping system for ore slurry transport according to any one of claims 1 to 11, wherein the ore slurry transport is performed. Measured by the moving speed measuring means provided in the piping system, a speed / wear degree storing means for storing the relationship between the moving speed of the ore and the wear degree of the ore obtained in advance, and the moving speed measuring means. An ore wear degree measuring device, comprising: a wear degree deriving means for deriving the wear degree of the ore by applying the moving speed to the speed / abrasion degree storage means.   The high-speed camera is used as the moving speed measuring means, and two high-speed cameras are provided at a predetermined distance with respect to the transparent photographing pipe provided in the ore slurry transport pipe system. The ore wear degree measuring apparatus according to claim 15 quoting claim 9 or claim 10.   17. The ore wear degree measuring apparatus according to claim 16, wherein the two high-speed cameras capture the ore in synchronization. The ore wear degree measuring apparatus according to claim 16 or 17, wherein a scale is provided along the transparent photographing pipe so as to fall within a photographing range of the high-speed camera.