System for conveying mineral fluid mixture

Abstract

The present disclosure relates to a system for delivering a mineral fluid mixture, the system comprising: a plurality of flow influencing devices for flushing a conduit with a flushing fluid and delivering the mineral fluid mixture through the conduit; at least one sensor configured to assist in determining a state of the mineral fluid mixture in the pipeline; and a controller configured to receive information from the sensor, where the controller is configured to actuate a plurality of flow affecting devices to flush the conduit with a flushing fluid; and wherein, in response to the controller identifying a predetermined activation state of the mineral fluid mixture based on the information received from the at least one sensor, the controller is configured to control the flow influencing device to stop flushing the conduit with the flushing fluid and to begin conveying the mineral fluid mixture through the conduit.

Description

[0001] Cross Reference to Related Applications

[0002] This application claims priority from Australian Patent Application No. 2024220116 filed on 26 September 2024, the disclosure of which is incorporated herein in its entirety by reference. TECHNICAL FIELD

[0003] The present disclosure relates to a control system for the transport of mineral fluid mixtures. In particular, the present disclosure relates to, but is not limited to, a control system for the long distance transport of mineral fluid mixtures and tailings management. BACKGROUND

[0004] The reference to or discussion of any document, act, or item of knowledge in this specification is for the purpose of providing a context for the invention. It is not an admission that any such item was known, or that its contents were part of the prior art, at the priority date of the specification. It is also not an admission that any such item is part of the common general knowledge of the person skilled in the art in the United States.

[0005] The mining of iron ore, including magnetite, has a long and traditional history. Iron ore plays a key role in our society, but there are various challenges in mining, processing and transporting iron ore from remote and difficult to access mines, typically used to mine the ore, to ports for export or to processing facilities. For transport, the ore can be mixed with fluids and other chemicals to form a slurry which is then pumped through a pipeline. However, the transport of the slurry via a pipeline is a complex process.

[0006] Firstly, the ore must be converted into a slurry. The slurry is then transported via a pipeline to a thickener for further processing. A flocculant is added to the slurry in the thickener to cause the ore in the slurry to concentrate at the bottom of the thickener which is then pushed out of the bottom of the thickener by a rake into another pipeline. A pump then pushes the concentrated slurry through the pipeline to a port for shipping for further processing. To effectively transport the slurry, the particles must remain suspended, i.e. a state of turbulent flow is required in the pipeline. Settlement of the particles during transport can result in stratified flow which in turn can result in uneven and excessive wear of the pipeline, and in extreme cases, a blockage of the pipeline due to a build-up of solids around a pipe fitting or an inclined section. To maintain turbulent flow in the pipeline, the slurry is typically diluted with water to reduce the likelihood of a blockage occurring. A high powered pump can also be required to pump the slurry through the pipeline. In particular, when a slurry with a high concentration of particles is pumped through the pipeline, the pump requires a large amount of energy due to the frictional forces of the slurry within the pipeline.

[0007] Processing of iron ore also produces a by-product, tailings, which is considered waste. There are various ways of managing tailings, one option is to use a thickener to settle suspended solids and return clean water to the system. In this regard, the operation of using a thickener to treat tailings is a complex and costly procedure. A flocculant is added to the tailings in the thickener to cause the tailings to concentrate at the bottom of the thickener. A pump then pushes the concentrated tailings through a pipeline. Pushing the tailings slurry through the pipeline requires a significant amount of energy and needs to overcome various obstacles, including minimising the likelihood of the tailings particles settling and solidifying in the pipeline after they have been concentrated. Furthermore, the use of a flocculant as a thickener is costly. Accordingly, managing the addition of the flocculant to the thickener is also important to save costs and use chemicals more efficiently. SUMMARY

[0008] In one aspect, the present disclosure provides a system for transporting a mineral fluid mixture, the system comprising: a plurality of flow influencing devices for flushing a pipeline with a flushing fluid and transporting the mineral fluid mixture through the pipeline; at least one sensor configured to assist in determining a state of the mineral fluid mixture in the pipeline; and a controller configured to receive information from the sensor, wherein the controller is configured to actuate the plurality of flow influencing devices to flush the pipeline with the flushing fluid; and wherein, in response to the controller identifying a predetermined start-up state of the mineral fluid mixture based on the information received from the at least one sensor, the controller is configured to control the flow influencing devices to stop flushing the pipeline with the flushing fluid and initiate transportation of the mineral fluid mixture through the pipeline.

[0009] The predetermined start-up state can be a flow rate of the mineral fluid mixture. In one example, the flow rate of the mineral fluid mixture can be at least about 2800 m 3 / h. In one example, the mineral fluid mixture is associated with a concentrated slurry. In another example, the flow rate of the mineral fluid mixture can be at least about 6000 m 3 / h. In one example, the mineral fluid mixture is associated with a tailings slurry.

[0010] In another aspect, the present disclosure provides a system for transporting a mineral fluid mixture, the system comprising: a plurality of flow influencing devices for transporting the mineral fluid mixture through a pipeline; at least one sensor configured to assist in determining a state of the mineral fluid mixture in the pipeline; and The controller is configured to receive information from the sensors. In response to the controller identifying a predetermined optimal state of the mineral fluid mixture based on information received from the at least one sensor, the controller is configured to control the plurality of flow-influencing devices to maintain the continuous flow of the mineral fluid mixture through the pipeline.

[0011] The predetermined optimal state can be the flow rate of the mineral-fluid mixture. In one example, the flow rate of the mineral-fluid mixture could be approximately 2500 m³ / s. 3 / h to 3500m 3 Between / h. In one example, the flow rate of the mineral fluid mixture could be around 2800 m. 3 / h to 3400m 3 Between / h. In one example, the mineral fluid mixture is associated with a concentrated slurry. In another example, the flow rate of the mineral fluid mixture can be around 6000 m³ / h. 3 / h to 9000m 3 Between / h. In yet another example, the flow rate of the mineral fluid mixture can be at least approximately 3000 m. 3 / h. In one example, the mineral fluid mixture is associated with tailings slurry.

[0012] The predetermined optimal state may include the mineral concentration in the mineral fluid mixture. In one example, the mineral concentration in the mineral fluid mixture may be approximately 55% to 80%. In another example, the mineral concentration in the mineral fluid mixture may be approximately 65% ​​to 75%. In yet another example, the mineral concentration in the mineral fluid mixture may be approximately 60% to 80%. In yet another example, the mineral concentration in the mineral fluid mixture may be approximately 62% to 75%. In yet another example, the mineral concentration in the mineral fluid mixture may be approximately 45% to 55%. In one embodiment, the mineral concentration in the mineral fluid mixture is related to the thickened slurry or tailings slurry.

[0013] The predetermined optimal state may include the density of the mineral-fluid mixture. In one example, the density of the mineral-fluid mixture may be approximately 1500 to 2500 kg / m³. 3 In another example, the density of the mineral-fluid mixture can be approximately 1200 to 1700 kg / m³. 3 In yet another example, the density of the mineral-fluid mixture can be approximately 2050 kg / m³. 3 In another example, the density of the mineral-fluid mixture can be approximately 2060 to 2462 kg / m³. 3 In yet another example, the density of the mineral-fluid mixture can be approximately 1418 to 1563 kg / m³. 3In one example, the density of the mineral fluid mixture can be associated with a thickened slurry or a tailings slurry.

[0014] In yet another aspect, the present disclosure provides a system for transporting a mineral fluid mixture, the system comprising: a plurality of flow influencing devices in fluid communication with the pipeline; a controller configured to control the plurality of flow influencing devices, wherein the plurality of flow influencing devices comprises at least four flow influencing devices in series configured to pump the mineral fluid mixture at least five kilometers.

[0015] The controller can be configured to sequentially actuate and / or de-actuate the plurality of flow influencing devices.

[0016] In one example, the controller can sequentially de-actuate the plurality of flow influencing devices in response to a mineral concentration in the mineral fluid mixture being less than about 10%. In another example, the controller can sequentially de-actuate the plurality of flow influencing devices in response to a mineral concentration in the mineral fluid mixture being less than about 5%.

[0017] The plurality of flow influencing devices can be sequentially actuated and / or de-actuated to reduce backflow of the mineral fluid mixture through the pipeline.

[0018] In another aspect, the present disclosure provides a system for transporting a mineral fluid mixture, the system comprising: a plurality of flow influencing devices; and a controller configured to control the plurality of flow influencing devices, wherein the controller is configured to sequentially actuate and / or de-actuate the plurality of flow influencing devices to reduce backflow of the mineral fluid mixture through the pipeline.

[0019] In one example, the controller can sequentially de-actuate the plurality of flow influencing devices in response to a mineral concentration in the mineral fluid mixture being less than about 10%. In another example, the controller can sequentially de-actuate the plurality of flow influencing devices in response to a mineral concentration in the mineral fluid mixture being less than about 5%.

[0020] The plurality of flow influencing devices can be sequentially actuated and / or de-actuated to reduce backflow of the mineral fluid mixture through the pipeline.

[0021] In one example, when the discharge pressure of the mineral fluid mixture is greater than or equal to 2800 kPa, the controller can be configured to reduce the speed of the plurality of flow affecting devices to reduce the discharge pressure. In another example, when the discharge pressure of the mineral fluid mixture is less than or equal to 1200 kPa, the controller can be configured to increase the speed of the plurality of flow affecting devices to increase the discharge pressure.

[0022] The system can also include a storage tank for storing the mineral fluid mixture. When the volume of the mineral fluid mixture in the storage tank is less than or equal to 1950 m 3 , the controller can be configured to sequentially shut down the plurality of flow affecting devices to stop the delivery of the mineral fluid mixture.

[0023] When the flow rate of the mineral fluid mixture is between 2800 m 3 / h and 3200 m 3 / h, the density of the mineral fluid mixture is between 1000 kg / m 3 and 2400 kg / m 3 , or the concentration of the mineral fluid mixture is between 2% and 70%, the mineral fluid mixture can be delivered in a batch-by-batch mode. In another example, when the flow rate of the mineral fluid mixture is between 6000 m 3 / h and 8000 m 3 / h, the density of the mineral fluid mixture is between 1000 kg / m 3 and 1600 kg / m 3 , or the concentration of the mineral fluid mixture is between 0% and 70%, the mineral fluid mixture can be delivered in a batch-by-batch mode.

[0024] The at least one thickening station can be located upstream or downstream of the plurality of flow affecting devices. The at least one thickening station can include: at least one sensor configured to assist in determining a state of at least one of an overflow or an underflow associated with the mineral fluid mixture being thickened in the thickening station; a controller configured to receive information from the sensor, wherein, in response to the controller identifying a predetermined state based on the information from the sensor, the controller is configured to control the at least one flow affecting device to change a property of the underflow.

[0025] The plurality of flow affecting devices can include a plurality of slurry pumps. The plurality of slurry pumps can be in series.

[0026] The mineral fluid mixture can include magnetite and / or silicate minerals and / or a flushing fluid. BRIEF DESCRIPTION OF DRAWINGS

[0027] Various preferred embodiments of the present disclosure will now be described, by way of example only, with reference to the accompanying drawings in which Figure 1 A schematic view of a system for transporting a mineral fluid mixture is shown, in accordance with one embodiment of the present disclosure.

[0028] LIST OF REFERENCE NUMBERS

[0029] 1: System

[0030] 10: Transport station

[0031] 20: Thickening station

[0032] 21: Thickening station

[0033] 100: Control center

[0034] 110: Controller

[0035] 120: One or more sensors

[0036] S121: Sensor

[0037] S122: Sensor

[0038] S123: Sensor

[0039] S124: Sensor

[0040] S125: Sensor

[0041] 200: Multiple flow influencing devices

[0042] 210: Slurry pump

[0043] 220: Slurry pump

[0044] 230: Slurry pump

[0045] 240: Slurry pump

[0046] 250: Rinse fluid pump

[0047] 300: Multiple valves

[0048] 310: Control valve

[0049] 320: Discharge valve

[0050] 330: Rinse valve

[0051] 340: Reservoir valve

[0052] 400: Reservoir

[0053] 600: Reservoir

[0054] 610: feed valve

[0055] 700: thickener

[0056] 800: plurality of flow influencing devices

[0057] 810: slurry pump

[0058] 820: flocculant dosage device

[0059] 900: control center

[0060] 910: controller

[0061] 920: one or more sensors

[0062] S921: sensor

[0063] S922: sensor

[0064] S923: sensor

[0065] S924: sensor

[0066] S925: sensor

[0067] S926: sensor

[0068] S927: sensor DETAILED DESCRIPTION

[0069] Figure 1 A schematic of a system 1 for transporting a mineral fluid mixture, preferably a mixture of magnetite and a fluid, is shown. The system 1 comprises a transport station 10 and two thickening stations 20, 21.

[0070] The transport station 10 comprises a control center 100, a plurality of flow influencing devices 200, a plurality of valves 300 and a storage tank 400.

[0071] Control center 100 includes controller 110. Controller 110 is in communication with one or more sensors 120. In this example, there are five sensors S121, S122, S123, S124, and S125. Sensor S121 is in the form of a pressure / flow rate / density sensor. Sensor S121 is located downstream of multiple flow-influencing devices 200, i.e., at the discharge end of the flow-influencing devices 200. Sensor S121 is in fluid communication with the pipeline. Sensor S121 is configured to measure the (discharge) pressure, flow rate, and / or density of the mineral fluid mixture. Sensor S122 is in the form of a level sensor. Sensor S122 is in fluid communication with tank 400. Sensor S122 is configured to measure the level of the mineral fluid mixture in tank 400.

[0072] Sensor S123 is in the form of a pressure sensor. Sensor S123 is located upstream of the flow influencing device 200, i.e., at the suction end of the flow influencing device 200. Sensor S123 is in fluid communication with the pipeline. Sensor S123 is configured to measure the (suction / dynamic) pressure of the pipeline. Sensor S124 is in the form of a (flushing fluid) flow rate sensor. Sensor S124 is located downstream of the flushing fluid pump 250 and valve 330. Sensor S124 is in fluid communication with the flushing fluid pump 250. Sensor S124 is configured to measure the flow rate of the fluid pumped from the flushing fluid pump 250. Sensor S125 is in the form of a flow rate / density sensor. Sensor S125 is located downstream of the pipeline and upstream of the storage tank 600 of the second thickening station 21, i.e., at the discharge end of the pipeline after long-distance transport. Sensor S125 is in fluid communication with the pipeline. Sensor S125 is configured to measure the flow rate and / or density of the mineral fluid mixture at the discharge end of the pipeline after long-distance transport.

[0073] The controller 110 is configured to receive information from one or more sensors 120. Based on the received information, the controller is configured to control multiple flow-influencing devices 200, multiple valves 300, and a storage tank 400.

[0074] Multiple flow-influencing devices 200 include at least four slurry pumps 210, 220, 230, and 240, and a flushing fluid pump 250. In this example, the four slurry pumps 210, 220, 230, and 240 are arranged in series, i.e., one after another. The four slurry pumps 210, 220, 230, and 240 are located downstream of the storage tank 400 and the flushing fluid pump 250. The four slurry pumps 210, 220, 230, and 240 are in communication with a controller 110. The controller 110 is configured to sequentially actuate and / or shut down the four slurry pumps 210, 220, 230, and 240 to reduce backflow of the mineral fluid mixture through the pipeline, prevent blockages, and ensure efficient delivery. Specifically, the four slurry pumps 210, 220, 230, and 240 are configured to be actuated sequentially from the first pump to the last and / or shut down sequentially from the last pump to the first pump. In this configuration, the last pump is pump 240, which is furthest from storage tank 400, and the first pump is pump 210, which is closest to storage tank. In other examples, slurry pumps 210, 220, 230, and 240 can be actuated in different orders, and the number of pumps can be more or less than four. In one example, four slurry pumps 210, 220, 230, and 240 are configured to pump the mineral-fluid mixture for at least five kilometers. In another example, four slurry pumps 210, 220, 230, and 240 are configured to pump the mineral-fluid mixture for at least eight kilometers. In yet another example, four slurry pumps 210, 220, 230, and 240 are configured to pump the mineral-fluid mixture for at least thirty kilometers.

[0075] A flushing fluid pump 250 is located downstream of storage tank 400 and / or upstream of four slurry pumps 210, 220, 230, and 240. The flushing fluid pump 250 is located between valves 340 and 310. The flushing fluid pump 250 is in fluid communication with the pipeline. The flushing fluid pump 250 is also in communication with controller 110. The flushing fluid pump 250 is configured to flush the pipeline with fluid to prevent any mineral fluid mixture from settling in the pipeline. In this example, the flushing fluid is in the form of water. In other examples, additional flushing fluid pumps may be used, or other suitable fluids may be employed.

[0076] Controller 110 is configured to receive the (suction / dynamic) pressure of the pipeline from sensor S123. Based on the (suction / dynamic) pressure received from sensor S123, controller 110 is configured to control four slurry pumps 210, 220, 230, and 240 to flush the pipeline with flushing fluid or to stop flushing the pipeline with flushing fluid. When the (suction / dynamic) pressure of the pipeline is greater than 50 kPa, controller 110 is configured to actuate the four slurry pumps 210, 220, 230, and 240 to flush the pipeline with flushing fluid. When the (suction / dynamic) pressure of the pipeline is greater than 50 kPa and the flow rate of the mineral fluid mixture in the pipeline is greater than 3000 m³ / h.3 When the flow rate is / h (nominal pipe diameter: 800mm), controller 110 is configured to control the plurality of flow influencing devices to stop flushing the pipe with flushing fluid and to initiate the delivery of the mineral fluid mixture through the pipe. In other examples, when the (suction / dynamic) pressure of the pipe is greater than 75kPa, controller 110 is configured to actuate four slurry pumps 210, 220, 230, and 240 to flush the pipe with flushing fluid. When the (suction / dynamic) pressure of the pipe is greater than 75kPa and the flow rate of the mineral fluid mixture in the pipe is greater than 5500m³ / h. 3 When the flow rate is / h (nominal pipe diameter: 1000mm), the controller 110 is configured to control four slurry pumps 210, 220, 230, 240 to stop flushing the pipe with the flushing fluid and start the delivery of the mineral fluid mixture through the pipe.

[0077] Controller 110 is configured to maintain a continuous flow of the mineral fluid mixture through the pipeline. Controller 110 is configured to adjust the speeds of the four slurry pumps 210, 220, 230, and 240 based on parameters of the mineral fluid mixture. For example, if the flow rate of the mineral fluid mixture is greater than 3400 m³ / s... 3 / h (nominal pipe diameter: 800mm), controller 110 is configured to reduce the speed of four slurry pumps 210, 220, 230, and 240 to reduce the flow rate. In another example, if the flow rate of the mineral fluid mixture is less than 2800m... 3 / h (nominal pipe diameter: 800mm), controller 110 is configured to increase the speed of four slurry pumps 210, 220, 230, and 240 to increase the flow rate. In another example, if the flow rate of the mineral fluid mixture is greater than 9000m... 3 / h (nominal pipe diameter: 1000mm), controller 110 is configured to reduce the speed of four slurry pumps 210, 220, 230, and 240 to reduce the flow rate. If the flow rate of the mineral fluid mixture is less than 6000m... 3 / h (nominal pipe diameter: 1000mm), controller 110 is configured to increase the speed of four slurry pumps 210, 220, 230, 240 to increase the flow rate.

[0078] If the discharge pressure of the mineral fluid mixture at the discharge end of the flow influencing device 200 (i.e., at sensor S121) is greater than 2800 kPa, the controller 110 is configured to reduce the speed of the four slurry pumps 210, 220, 230, and 240 to reduce the discharge pressure. If the discharge pressure of the mineral fluid mixture at the discharge end of the flow influencing device 200 (i.e., at sensor S121) is less than 1200 kPa, the controller 110 is configured to increase the speed of the four slurry pumps 210, 220, 230, and 240 to increase the discharge pressure. In other examples, if the discharge pressure of the mineral fluid mixture at the discharge end of the flow influencing device 200 (i.e., at sensor S121) is greater than 2400 kPa, the controller is configured to reduce the speed of the four slurry pumps 210, 220, 230, and 240 to reduce the discharge pressure. If the (discharge) pressure of the mineral fluid mixture at the discharge end of the flow influencing device 200 (i.e., at sensor S121) is less than 700 kPa, the controller is configured to increase the speed of the four slurry pumps 210, 220, 230, and 240 to increase the (discharge) pressure.

[0079] The controller 110 is also configured to sequentially actuate and / or shut down four slurry pumps 210, 220, 230, and 240 to reduce backflow of the mineral fluid mixture through the pipeline. In other examples, to reduce backflow of the mineral fluid mixture through the pipeline and maintain turbulence in the pipeline, the controller 110 is configured to close valve 340 of the storage tank 400 and actuate flushing fluid pump 250 to flush the pipeline with flushing fluid. The flow rate of the flushing fluid is controlled by flushing fluid pump 250 and the four slurry pumps 210, 220, 230, and 240.

[0080] In other examples, when the volume of the mineral fluid mixture in tank 400 is less than 1950 m³ 3 Furthermore, the flow rate of the flushing fluid pumped from the flushing fluid pump 250 is greater than 2000 m³ / s. 3 At a rate of / h, the controller is configured to close valve 340 of storage tank 400 and adjust the speeds of four slurry pumps 210, 220, 230, and 240 to stop the delivery of the mineral fluid mixture and begin flushing the pipeline with flushing fluid. In another example, when the volume of the mineral fluid mixture in storage tank 400 is less than 2670 m³... 3 Furthermore, the flow rate of the flushing fluid pumped from the flushing fluid pump 250 is greater than 4000 m³ / s. 3 At a rate of / h, the controller is configured to close valve 340 of storage tank 400 and adjust the speeds of four slurry pumps 210, 220, 230, and 240 to stop the delivery of the mineral fluid mixture and begin flushing the pipeline with flushing fluid.

[0081] If the mineral concentration in the mineral fluid mixture is low, controller 110 is configured to sequentially shut down four slurry pumps 210, 220, 230, and 240 to stop the delivery of the mineral fluid mixture. In one example, if the mineral concentration in the mineral fluid mixture is below approximately 10% at the discharge end of the pipeline after long-distance delivery (i.e., at sensor S125), controller 110 is configured to sequentially shut down four slurry pumps 210, 220, 230, and 240 to stop the delivery of the mineral fluid mixture. In another example, if the mineral concentration in the mineral fluid mixture is below approximately 5% at the discharge end of the pipeline after long-distance delivery (i.e., at sensor S125), controller 110 is configured to sequentially shut down four slurry pumps 210, 220, 230, and 240 to stop the delivery of the mineral fluid mixture. In yet another example, if the mineral concentration in the mineral-fluid mixture is less than about 2% at the discharge end of the four slurry pumps 210, 220, 230, 240 (i.e., at sensor S121) and less than about 5% at the discharge end of the pipeline after long-distance transport (i.e., at sensor S125), the controller 110 is configured to sequentially shut down the four slurry pumps 210, 220, 230, 240 to stop the transport of the mineral-fluid mixture. In yet another example, in response to the mineral concentration in the mineral-fluid mixture being about 0% at the discharge end of the four slurry pumps 210, 220, 230, 240 (i.e., at sensor S121) and less than about 1% at the discharge end of the pipeline after long-distance transport (i.e., at sensor S125), the controller is configured to sequentially shut down the four slurry pumps 210, 220, 230, 240 to stop the transport of the mineral-fluid mixture.

[0082] The plurality of valves 300 includes at least four valves 310, 320, 330, and 340. In this example, valve 310 is in the form of a control valve. Valve 310 is located upstream of the four slurry pumps 210, 220, 230, and 240. Valve 310 is configured to control the suction / dynamic pressure of the pipeline by controlling the flow rate of the mineral fluid mixture drawn into the pipeline. Valve 320 is in the form of a discharge valve. Valve 320 is located downstream of the four slurry pumps 210, 220, 230, and 240. Valve 320 is configured to control the flow rate of the mineral fluid mixture delivered through the pipeline. Valve 330 is in the form of a flushing valve. Valve 330 is located downstream of the flushing fluid pump 250. Valve 330 is configured to control the flow rate of fluid from the flushing fluid pump 250 to the pipeline. Valve 340 is in the form of a tank valve. Valve 340 is located downstream of the tank 400. Valve 340 is configured to control the flow rate of the mineral fluid mixture from tank 400 to pipeline.

[0083] Storage tank 400 is located upstream of flow influencing device 200. Storage tank 400 is configured to store a mineral fluid mixture received from thickening station 20. Storage tank 400 is in communication with sensor S122. Sensor S122 is configured to determine the state of the mineral fluid mixture in the storage tank. In this example, sensor S122 is configured to determine the level and / or volume of the mineral fluid mixture in storage tank 400.

[0084] In this example, the predetermined level of the mineral fluid mixture in tank 400 is between 35% and 100%. If the level of the mineral fluid mixture in tank 400 is below 35%, controller 110 is configured to stop the flow of the mineral fluid mixture from tank 400 and actuate flushing fluid pump 250.

[0085] In another example, the predetermined level of the mineral fluid mixture in tank 400 is between 41.7% and 97.2%. If the level of the mineral fluid mixture in tank 400 is below 41.7% and the flow rate of the flushing fluid pumped from flushing fluid pump 250 is greater than 2000 m³ / s... 3 At a certain time, the controller is configured to close valve 340 of storage tank 400 and adjust the speeds of flushing fluid pump 250 and four slurry pumps 210, 220, 230, and 240 to stop the delivery of the mineral fluid mixture and begin flushing the pipeline with flushing fluid. In another example, the predetermined level of the mineral fluid mixture in storage tank 400 is between 42.5% and 90%. If the level of the mineral fluid mixture in storage tank 400 is below 42.5% and the flow rate of the flushing fluid pumped from flushing fluid pump 250 is greater than 4000 m³ / h... 3 / h, the controller is configured to close valve 340 of storage tank 400 and adjust the speed of flushing fluid pump 250 and four slurry pumps 210, 220, 230, 240 to stop the delivery of mineral fluid mixture and start flushing the pipeline with flushing fluid.

[0086] In this example, system 1 includes at least two thickening stations 20, 21 for concentrating the mineral fluid mixture into a mineral concentrate and / or recovering process flushing fluid from the mineral fluid mixture. Each thickening station 20, 21 includes a storage tank 600, a thickener 700, multiple flow control devices 800, and a control center 900. One thickening station 20 is located at one end of system 1. The other thickening station 21 is located at the other end of system 1.

[0087] Tank 600 is located upstream of thickener 700. Tank 600 is configured to store a mineral fluid mixture. In this example, the mineral fluid mixture is in slurry form. Tank 600 includes valve 610. Valve 610 is in the form of a feed valve. Valve 610 is configured to allow the mineral fluid mixture to flow from tank 600 into thickener 700. Valve 610 is in communication with controller 910.

[0088] Thickener 700 is located downstream of storage tank 600 and upstream of slurry pump 810. Thickener 700 is configured to receive a mineral fluid mixture from storage tank 600. Thickener 700 is configured to separate suspended solids from the fluid in the mineral fluid mixture by using a flocculant. In other examples, thickener 700 may include a moving device in the form of a rake 701 to convey the separated solids by pushing them through the bottom of thickener 700. In this example, thickener 700 of the second thickening station 21 may be a deep cone thickener with high torque and bed pressure settings, which has a higher underflow density and is able to recover more process flushing fluid compared to the thickener in the first thickening station 20. The high-concentration slurry is discharged to a tailings dam, which allows for the formation of a large beach angle, thereby advantageously saving storage space.

[0089] The plurality of flow control devices 800 include a slurry pump 810 and a flocculant dosing device 820. The slurry pump 810 is located downstream of the thickener 700. The slurry pump 810 is configured to pump the mineral fluid mixture to a storage tank 400 in the delivery station 10. The flocculant dosing device 820 is connected to a controller 910 and the thickener 700. The flocculant dosing device 820 is configured to add flocculant to the thickener 700 based on the turbidity of the overflow measured by sensor S921.

[0090] Control center 900 includes controller 910 and multiple sensors 920. Controller 910 is configured to receive information from the multiple sensors 920. Based on the received information, controller is configured to control the multiple flow control devices 800, storage tank 600, and thickener 700. The multiple sensors 920 include at least seven sensors S921, S922, S923, S924, S925, S926, and S927. Sensor S921 is in the form of an overflow turbidity sensor. Sensor S921 is located within thickener 700. Sensor S921 is configured to measure the turbidity of the overflow from thickener 700. For example, the overflow is a substantially clear liquid / water separated from the thickened slurry during the thickening process. S922 is in the form of a bed pressure sensor. Sensor S922 is located within thickener 700. Sensor S922 is configured to measure the bed pressure of thickener 700.

[0091] Sensor S923 is a mineral fluid mixture level sensor. Sensor S923 is located inside storage tank 600. Sensor S923 is configured to measure the level of the mineral fluid mixture in storage tank 600. Sensor S924 is also a mineral fluid mixture level sensor. Sensor S924 is located inside thickener 700. Sensor S924 is configured to measure the level (bed level) of the settled concentrate in thickener 700. The level of the settled concentrate in thickener 700 is used to adjust the flow rate of flocculant added to thickener 700. Sensor S925 is a torque sensor. Sensor S925 is located inside thickener 700. Sensor S925 is configured to measure the torque of rake 701 in thickener 700. Sensor S926 is a flow meter. Sensor S926 is located inside thickener 700 and is connected to flocculant dosing device 820. Sensor S926 is configured to monitor the flow rate of flocculant from flocculant dosing device 820 to thickener 700. Sensor S927 is in the form of a discharge flow rate / density sensor. Sensor S927 is located downstream of slurry pump 810. Sensor S927 is configured to measure the discharge flow rate / density of the mineral fluid mixture in the pipeline. In particular, sensor S927 is configured to measure the flow rate and / or density of the underflow.

[0092] In this example, controller 910 is configured to receive information from sensors S921, S922, S923, S924, S925, S926, and S927, and to identify a predetermined state based on the received information. In response to controller 910 identifying the predetermined state, controller 910 is configured to control at least one of the plurality of flow control devices 800 to change the nature of the underflow.

[0093] In this example, sensors S921, S922, S923, S924, S925, S926, and S927 detect information related to overflow turbidity, bed pressure, the level of the mineral fluid mixture in tank 600, bed level, torque, and flocculant flow rate. Controller 910 uses the detected information to optimize flocculant dosage, control overflow turbidity, and ensure the safe operation of the thickener and pipelines.

[0094] In this example, the pipes of thickening stations 20 and 21 and conveying station 10 are primarily used for conveying concentrated slurry. The diameter of these pipes is approximately 800 mm. System 1 may also include additional pipes, for example, for conveying tailings slurry. The diameter of these pipes is approximately 1000 mm.

[0095] To transport the mineral fluid mixture, controller 110 opens discharge valve 320 and control valve 310. Then, controller 110 actuates flushing fluid pump 250 and opens flushing valve 330 to flush the pipeline with flushing fluid. In this example, the flushing fluid is in the form of water. Sensor S124 measures the flow rate of the flushing fluid pumped from flushing fluid pump 250 and sends the measurement result to controller 110. Then, controller 110 sequentially actuates four slurry pumps 210, 220, 230, and 240. The four slurry pumps 210, 220, 230, and 240 are actuated sequentially from the first slurry pump 210 to the last slurry pump 240. The controller 110 is configured to control four slurry pumps 210, 220, 230, and 240 to maintain the suction pressure at the inlet of the flow-influencing device 200 (i.e., at sensor S123) greater than 50 kPa and the discharge flow rate at the outlet of the flow-influencing device 200 (i.e., at sensor S121) greater than 3000 m³ / s. 3 / h (nominal pipe diameter: 800mm).

[0096] In another example, to transport the mineral fluid mixture, controller 110 opens control valve 310. Then, controller 110 actuates flushing fluid pump 250 and opens flushing valve 330 to flush the pipeline with flushing fluid. Then, controller 110 opens discharge valve 320. When the discharge pressure at the discharge end of flow-affected device 200 (i.e., at sensor S121) is greater than 600 kPa, controller 110 sequentially actuates four slurry pumps 210, 220, 230, and 240. The four slurry pumps 210, 220, 230, and 240 are actuated sequentially from the first slurry pump 210 to the last slurry pump 240. The controller 110 is configured to control four slurry pumps 210, 220, 230, and 240 to maintain the (suction) pressure of the mineral fluid mixture at the suction end of the flow influencing device 200 (i.e., at sensor S123) greater than 75 kPa, and to maintain the (discharge) flow rate at the discharge end of the flow influencing device 200 (i.e., at sensor S121) greater than 5500 m³ / s. 3 / h (nominal pipe diameter: 1000mm).

[0097] While the pipeline is being flushed with flushing fluid, the storage tank 600 of the thickening station 20 is being filled with a mineral fluid mixture. Sensor S923 measures the level of the mineral fluid mixture in storage tank 600 and sends the measurement result to controller 910. Once the level of the mineral fluid mixture in storage tank 600 reaches a predetermined level, controller 910 is configured to open feed valve 610 to allow the mineral fluid mixture to flow from storage tank 600 into thickener 700. In this example, the predetermined level of the mineral fluid mixture in storage tank 600 is above 10%.

[0098] Once the mineral fluid mixture is in the thickener 700, sensor S921 begins measuring the turbidity of the overflow and sends the measurement result to controller 910. Once the overflow turbidity reaches a predetermined range, controller 910 is configured to adjust the flocculant flow rate via flocculant dosing device 820. In this example, the predetermined turbidity of the overflow is between 0 and 200 ppm. Specifically, when the overflow turbidity is above 200 ppm, flocculant dosing device 820 is configured to increase the flocculant flow rate. When the overflow turbidity is below 100 ppm, flocculant dosing device 820 is configured to decrease the flocculant flow rate. In another example, the predetermined turbidity of the overflow is between 0 and 300 ppm. Specifically, when the overflow turbidity is above 300 ppm, flocculant dosing device 820 is configured to increase the flocculant flow rate. When the overflow turbidity is below 150 ppm, flocculant dosing device 820 is configured to decrease the flocculant flow rate.

[0099] Meanwhile, sensor S922 measures the bed pressure of the thickener 700 and sends the measurement result to controller 910. Once the bed pressure of the thickener 700 is within a predetermined range, controller 910 is configured to actuate a moving device within the thickener 700 to move the mineral fluid mixture. In this example, the moving device includes a rake 701. More specifically, rake 701 is configured to force the mineral fluid mixture through the bottom of the thickener 700. When the bed pressure of the thickener 700 is above 0% (as low as possible), the controller is configured to automatically lower rake 701. Rake 701 is then actuated to force the mineral fluid mixture through the bottom of the thickener 700. When the bed pressure of the thickener 700 is approximately 0%, the rake is shut off to save energy. In this example, the position of rake 701 is adjusted based on the torque of the rake. For example, when the rake torque is above 30%, the controller 910 is configured to automatically adjust (raise) the rake to prevent damage to the rake blades and the rake drive system. When the rake torque is below 27%, if the rake 701 is not already in its lowest position (0 position), the controller is configured to adjust (lower) the position of the rake 701.

[0100] The slurry pump 810 is then actuated to transport the mineral fluid mixture via pipeline to the storage tank 400 of the conveying station 10. The sensor S927 measures the discharge flow rate / density of the mineral fluid mixture in the pipeline from the thickening station 20 to the conveying station 10.

[0101] While the storage tank 400 of the conveying station 10 is being filled with the mineral fluid mixture, sensor S124 measures the flow rate of the flushing fluid through the pipeline. Sensor S124 sends the measurement result to controller 110. Once the flow rate of the flushing fluid reaches a predetermined flow rate, controller 110 is configured to open valve 340 to allow the mineral fluid mixture to flow from storage tank 400 into the pipeline, thus initiating the conveying process. In this example, the predetermined flow rate of the flushing fluid is 3000 m³ / s. 3 / h (nominal pipe diameter: 800mm). In another example, the predetermined flow rate of the flushing fluid is 5500m³ / h. 3 / h (nominal pipe diameter: 1000mm). Sensor S122 measures the liquid level of the mineral fluid mixture in storage tank 400. Sensor S122 sends the measurement result to controller 110.

[0102] Once the transport of the mineral fluid mixture begins and the flow rate of the mineral fluid mixture reaches approximately 2800 m³ / s... 3 Upon reaching the predetermined start-up state, controller 110 shuts down flushing fluid pump 250 and closes flushing valve 330 to stop flushing the pipeline with flushing fluid. Then, the four slurry pumps 210, 220, 230, and 240 switch to continuous mode. In this example, continuous mode refers to a mode in which the mineral fluid mixture is continuously delivered. Sensors S121 and S123 measure the (discharge) pressure / flow rate / density of the mineral fluid mixture in the pipeline and the (suction) pressure of the pipeline, respectively. Controller 110 adjusts the speeds of the four slurry pumps 210, 220, 230, and 240 to maintain the flow rate / pressure of the mineral fluid mixture in the pipeline within a predetermined range for continuous mode. In this example, the predetermined (discharge) pressure at S121 (the discharge end of flow influencing device 200) is between 1200 kPa and 2800 kPa. The predetermined flow rate of the mineral fluid mixture is 2800 m³ / h. 3 / h to 3400m 3 The flow rate is between 800 mm and 1000 kPa (nominal pipe diameter: 800 mm). The predetermined (suction) pressure of the mineral fluid mixture in the pipe at S123 (suction end of flow influencing device 200) is between 50 kPa and 1000 kPa. This pressure may represent the dynamic pressure of the mineral fluid mixture, but it should be understood that static pressure may form a part of this pressure (to constitute the total pressure). The (dynamic) pressure of the mineral fluid mixture may produce a suction effect. In another example, other parameters may be considered in continuous mode. For example, the density and mineral concentration of the mineral fluid mixture. The predetermined density of the mineral fluid mixture is 1900 kg / m³. 3 Up to 2500 kg / m 3The predetermined concentration of minerals in the mineral fluid mixture is between 62% and 75%, preferably 70%. In another example, the predetermined (discharge) pressure at S121 (the discharge end of the flow influencing device 200) is between 700 kPa and 2400 kPa. The predetermined flow rate of the mineral fluid mixture is 6000 m³ / s. 3 / h to 9000m 3 The flow rate is between 1000 mm and 70 kPa (nominal pipe diameter: 1000 mm). The predetermined (suction) pressure of the mineral fluid mixture in the pipe at S123 (suction end of the flow influencing device 200) is between 70 kPa and 2000 kPa. The predetermined density of the mineral fluid mixture is 1418 kg / m³. 3 Up to 1563 kg / m 3 The predetermined concentration of minerals in the mineral fluid mixture is between 45% and 55%, preferably 50%.

[0103] In other examples, the mineral fluid mixture can be delivered in batches. Specifically, when the flow rate of the mineral fluid mixture at the discharge end of the flow-influencing device 200 is 2800 m³ / s. 3 / h to 3200m 3 The density of the mineral fluid mixture at the discharge end of the flow-influencing device 200 is between 1000 kg / m³ and between 1000 kg / m³. 3 Up to 2400 kg / m 3 When the concentration of the mineral fluid mixture is between 2% and 70%, the mineral fluid mixture can be delivered in batches. In another example, when the flow rate of the mineral fluid mixture at the discharge end of the flow influencing device 200 is 6000 m³ / s... 3 / h to 8000m 3 The density of the mineral fluid mixture at the discharge end of the flow influencing device 200 is between 1000 kg / m³ and 1000 kg / m³ (nominal pipe diameter: 1000 mm). 3 Up to 1487 kg / m 3 When the concentration of the mineral fluid mixture at the discharge end of the flow influencing device 200 is between 0% and 50%, the mineral fluid mixture can be transported in batches.

[0104] The mineral fluid mixture is then transported over a long distance via pipeline to the storage tank 600 of the second thickening station 21. In this example, four slurry pumps 210, 220, 230, and 240 are configured to transport the mineral fluid mixture for at least five kilometers.

[0105] A process similar to that described in the first thickening station 20 is then performed to thicken the mineral fluid mixture in the second thickening station 21. The discharge densities of the concentrated slurry from the thickeners of the first thickening station 20 and the second thickening station 21 are 65% to 75% and 68% to 78%, respectively. In another example, the discharge densities of the concentrated slurry from the thickeners of the first thickening station 20 and the second thickening station 21 are 45% to 55% and 60% to 63%, respectively. If the second thickening station 21 is a deep cone thickener, the discharge density of the concentrated slurry can be as high as approximately 70%.

[0106] To stop the delivery of the mineral fluid mixture, controller 110 is configured to close the discharge valve 340 of storage tank 400. Controller 110 then actuates flushing fluid pump 250 to flush the pipeline with flushing fluid. The flow rate of the flushing fluid is adjusted by regulating the speeds of flushing fluid pump 250 and four slurry pumps 210, 220, 230, and 240. In one example, delivery of the mineral fluid mixture is stopped if the mineral concentration in the mineral fluid mixture at the discharge points of the four slurry pumps 210, 220, 230, and 240 is below approximately 2%, and the concentration at the pipeline discharge point after long-distance delivery is below approximately 5%. In another example, delivery of the mineral fluid mixture is stopped if the mineral concentration in the mineral fluid mixture at the discharge points of the four slurry pumps 210, 220, 230, and 240 is approximately 0%, and the concentration at the pipeline discharge point after long-distance delivery is below approximately 1%. Controller 110 gradually reduces the speeds of the four slurry pumps 210, 220, 230, and 240. Then, controller 110 sequentially stops pumps 210, 220, 230, and 240, starting from the last slurry pump 240 and ending with the first slurry pump 210. Controller 110 closes valve 330 to stop flushing the pipeline with flushing fluid, shuts off flushing fluid pump 250, and closes suction valve 310 and discharge valve 320.

[0107] Those skilled in the art will understand that at least one of the described embodiments may provide one or more of the following advantages: Improved systems and methods for long-distance slurry transport.

[0108] Improved systems and methods for thickening tailings.

[0109] Using two thickening stations 20 and 21 and thus carrying out a two-stage thickening process allows for faster recycling of process water after the first stage of thickening at the first thickening station 20, and less slurry is transported to the tailings treatment facility.

[0110] The sequential actuation and shutdown of the four slurry pumps 210, 220, 230, and 240 ensures that the pressure at the suction end of the pump series is higher than the pressure at the discharge end. This advantageously prevents fluid and / or slurry backflow into the slurry pumps 210, 220, 230, and 240, which would cause the pumps to rotate in reverse and lead to pump damage.

[0111] Thickening the mineral fluid mixture before transport yields a slurry with a higher density and advantageously reduces the volume to be transported. This ultimately makes the dewatering process more efficient and time-saving, especially during the conversion of the slurry into filter cake. Furthermore, two-stage thickening allows for faster recovery of process water after the first-stage thickening and reduces the amount of slurry transported to tailings treatment facilities.

[0112] It should also be understood that flushing the pipeline before and after the mineral fluid mixture is transported prevents mineral particles from settling and ensures unobstructed passage for subsequent batches.

[0113] Monitoring and controlling the parameters of mineral fluid mixtures effectively prevents pipe blockage and ensures efficient transport by minimizing the settling of mineral particles within the pipe.

[0114] Furthermore, it should be understood that using tandem slurry pumps advantageously provides a greater head to meet the system requirements for long-distance transport of high-density, fine-grained magnetite concentrate at higher flow rates, which prevents magnetite particles from settling in the pipeline.

[0115] In this specification, the terms “comprising,” “including,” or similar terms are intended to indicate a non-exclusive inclusion, and therefore a method, system, or apparatus that includes a list of elements may include not only those elements but also other elements not listed.

[0116] In this specification, the term "underflow" should be understood as a mineral-rich thickened solid of concentrate or tailings. As stated above, the term "overflow" should be understood as a liquid byproduct, for example, that is substantially free of minerals, produced during the thickening process of concentrate or tailings.

[0117] In this manual, the percentage of bed pressure in the thickener is relative to the maximum pressure at bed height. The pressure at bed height is measured by a pressure sensor / transmitter and displayed as a value between 0% and 100%. Bed pressure is equal to the height from the bottom of the discharge point to the water level multiplied by the specific gravity of the thickener and the liquid.

[0118] In this specification, the percentage of the moving device torque refers to, for example, the relative pressure of the hydraulic fluid used to drive the hydraulic motor of the moving device. The pressure of the hydraulic fluid is measured by a pressure transmitter installed in the hydraulic system of the moving device.

[0119] In this specification, the percentage of the mineral fluid mixture level in the storage tank is related to the concentration of the concentrate in the distribution station. When it is 0%, the distribution station is empty. When it is 100%, the distribution station is full.

[0120] In this specification, the percentage of mineral concentration in a mineral fluid mixture refers to the percentage of concentrate in the mineral fluid mixture.

[0121] In this specification, the percentage of discharge density of concentrated slurry from the thickening station refers to the mass percentage of solids in the slurry.

[0122] The foregoing description of embodiments of this disclosure is provided to those skilled in the art. It is not intended to be exhaustive, nor is it intended to limit this disclosure to the single embodiment disclosed. As described above, numerous alternatives and variations of this disclosure will be apparent to those skilled in the art based on the foregoing teachings. Therefore, while some alternative embodiments have been specifically discussed, other embodiments will be apparent or relatively readily developed by those skilled in the art. This disclosure is intended to cover all modifications, alternatives, and variations discussed herein, as well as other embodiments falling within the concept and scope of the foregoing description.

Claims

1. A system for conveying a mixture of mineral fluids, the system comprising: Multiple flow-influencing devices are used to flush the pipe with flushing fluid and to transport the mineral fluid mixture through the pipe; At least one sensor is configured to assist in determining the state of the mineral fluid mixture in the pipeline; as well as The controller is configured to receive information from the sensor. The controller is configured to actuate the plurality of flow-influencing devices to flush the pipe with flushing fluid; and In response to the controller identifying a predetermined start-up state of the mineral fluid mixture based on information received from the at least one sensor, the controller is configured to control the flow influencing device to stop flushing the pipe with flushing fluid and begin transporting the mineral fluid mixture through the pipe.

2. The system according to claim 1, wherein the predetermined start-up state is that the flow rate of the mineral fluid mixture is at least about 2800 m³ / s. 3 / h.

3. The system according to claim 1, wherein the predetermined start-up state is that the flow rate of the mineral fluid mixture is at least about 6000 m³ / s. 3 / h.

4. A system for conveying a mixture of mineral fluids, the system comprising: Multiple flow-influencing devices are used to transport the mineral fluid mixture through pipelines; At least one sensor is configured to assist in determining the state of the mineral fluid mixture in the pipeline; as well as The controller is configured to receive information from the sensor. In response to the controller identifying a predetermined optimal state of the mineral fluid mixture based on information received from the at least one sensor, the controller is configured to control the plurality of flow-influencing devices to maintain the continuous flow of the mineral fluid mixture through the pipeline.

5. The system of claim 4, wherein the predetermined optimal state comprises a flow rate of approximately 2500 m³ / s of the mineral fluid mixture. 3 / h to 3500m 3 Between / h.

6. The system of claim 4, wherein the predetermined optimal state includes a flow rate of approximately 6000 m³ / s of the mineral fluid mixture. 3 / h to 9000m 3 Between / h.

7. The system of claim 4, wherein the predetermined optimal state comprises a flow rate of at least approximately 3000 m³ / s of the mineral fluid mixture. 3 / h.

8. The system according to any one of claims 4 to 7, wherein the predetermined optimal state comprises a mineral concentration of about 55% to 80% in the mineral fluid mixture.

9. The system according to any one of claims 4 to 7, wherein the predetermined optimal state comprises a mineral concentration of about 60% to 80% in the mineral fluid mixture.

10. The system according to any one of claims 4 to 7, wherein the predetermined optimal state comprises a mineral concentration of about 62% to 75% in the mineral fluid mixture.

11. The system according to any one of claims 4 to 10, wherein the predetermined optimal state comprises a mineral fluid mixture with a density of approximately 1500 kg / m³. 3 Up to 2500 kg / m 3 .

12. The system according to any one of claims 4 to 10, wherein the predetermined optimal state comprises a mineral fluid mixture with a density of approximately 1200 kg / m³. 3 Up to 1700 kg / m 3 .

13. The system according to any one of claims 4 to 10, wherein the predetermined optimal state comprises a density of approximately 2050 kg / m³ for the mineral fluid mixture. 3 .

14. A system for conveying a mixture of mineral fluids, the system comprising: Multiple flow-influencing devices are connected to the fluid in the pipeline; The controller is configured to control the plurality of flow-affecting devices. The plurality of flow-influencing devices include at least four flow-influencing devices connected in series, the flow-influencing devices being configured to pump the mineral fluid mixture for at least five kilometers.

15. The system according to any one of the preceding claims, wherein the controller is configured to sequentially actuate and / or shut down the plurality of flow-affecting devices.

16. The system of claim 15, wherein in response to a mineral concentration in the mineral fluid mixture being less than about 10%, the controller sequentially shuts down the plurality of flow-affecting devices.

17. The system of claim 15, wherein in response to a mineral concentration in the mineral fluid mixture being less than about 5%, the controller sequentially shuts down the plurality of flow-affecting devices.

18. The system according to any one of claims 15 to 17, wherein the plurality of flow-influencing devices are sequentially actuated and / or shut down to reduce backflow of the mineral fluid mixture through the conduit.

19. A system for conveying a mixture of mineral fluids, the system comprising: Multiple flow-affecting devices; as well as The controller is configured to control the plurality of flow-affecting devices. The controller is configured to sequentially actuate and / or shut down the plurality of flow-affecting devices to reduce backflow of the mineral fluid mixture through the pipe.

20. The system of claim 19, wherein in response to a mineral concentration in the mineral fluid mixture being less than about 10%, the controller sequentially shuts down the plurality of flow-affecting devices.

21. The system of claim 19, wherein in response to a mineral concentration in the mineral fluid mixture being less than about 5%, the controller sequentially shuts down the plurality of flow-affecting devices.

22. The system according to any one of the preceding claims, wherein when the discharge pressure of the mineral fluid mixture is greater than or equal to 2800 kPa, the controller is configured to reduce the speed of the plurality of flow-influencing devices to reduce the discharge pressure.

23. The system according to any one of the preceding claims, wherein when the discharge pressure of the mineral fluid mixture is less than or equal to 1200 kPa, the controller is configured to increase the speed of the plurality of flow-influencing devices to increase the discharge pressure.

24. The system according to any one of the preceding claims, wherein the system further comprises a storage tank for storing the mineral fluid mixture.

25. The system of claim 23, wherein the volume of the mineral fluid mixture in the storage tank is less than or equal to 1950 m³. 3 At that time, the controller is configured to sequentially shut down the plurality of flow-affecting devices to stop the delivery of the mineral fluid mixture.

26. The system according to any one of the preceding claims, wherein the flow rate of the mineral fluid mixture is 2800 m... 3 / h to 3200m 3 The density of the mineral fluid mixture is between 1000 kg / m³ and 1 h. 3 Up to 2400 kg / m 3 When the concentration of the mineral fluid mixture is between 2% and 70%, the mineral fluid mixture is delivered in batches.

27. The system according to any one of the preceding claims, wherein the flow rate of the mineral fluid mixture is 6000 m³ / s. 3 / h to 8000m 3 The density of the mineral fluid mixture is between 1000 kg / m³ and 1 h. 3 Up to 1600 kg / m 3 When the concentration of the mineral fluid mixture is between 2% and 70%, the mineral fluid mixture is delivered in batches.

28. The system according to any one of the preceding claims, wherein at least one thickening station is located upstream or downstream of the plurality of flow-influencing devices.

29. The system of claim 28, wherein the at least one thickening station comprises: At least one sensor is configured to assist in determining the state of at least one of the overflow or underflow associated with the mineral fluid mixture being thickened in the thickening station; The controller is configured to receive information from the sensor. In response to the controller identifying a predetermined state based on information from the sensor, the controller is configured to control at least one flow-influencing device to change the nature of the underflow.

30. The system according to any one of the preceding claims, wherein the plurality of flow-influencing devices comprises a plurality of slurry pumps.

31. The system of claim 30, wherein the plurality of slurry pumps are connected in series.

32. The system according to any one of the preceding claims, wherein the mineral fluid mixture comprises magnetite and / or silicate minerals and / or flushing fluid.

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