A washing slime water solid-liquid separation pressure filtration water circulation system and recycling method

Abstract

The application discloses a kind of washing slurry water solid-liquid separation pressure filtration water circulation systems and recycling methods, including filter press, slurry collecting pool, with the first filter water collecting tank and the second filter water collecting tank respectively communicated with the water inlet side of washing machine, and multiple dry mud-water settling tanks are communicated with the outlet end of washing machine, the slurry outlet of each mud-water settling tank is communicated with the slurry inlet of the slurry collecting pool, the slurry outlet of the slurry collecting pool is communicated with the slurry inlet of the filter press, the water outlet of the filter press is respectively communicated with the back inlet water inlet of the first filter water collecting tank and the back inlet water inlet of the second filter water collecting tank, and the supernatant outlet end of the mud-water settling tank is communicated with the water inlet end of washing machine;Mud-water collecting tank is arranged on the water outlet side of the washing machine.The solid-liquid separation pressure filtration water recycling process of the application, each mud-water settling tank is independently deposited, solves the problem that traditional sedimentation tank effluent is unstable and cannot be continuously closed circuit.

Description

Technical Field

[0001] This invention belongs to the field of mud and water treatment technology, and in particular relates to a solid-liquid separation and filter press water recycling system and recycling method for ore washing mud and water. Background Technology

[0002] In the process of mining, sand and gravel plants and tailings processing, the mud attached to the ore or sand and gravel needs to be washed before it can be further processed and used. To wash the mud attached to the ore or sand and gravel, a water washing and desliming production line is set up at the processing site to collect mud water, and the mud water is settled and separated into mud slurry, thereby reducing mud water pollution to the environment. Early methods of ore or sand washing and desliming involved collecting the washing water in a constructed mud-water collection pond, then discharging the settled clear water into natural water bodies, or constructing mud storage ponds for natural sedimentation, infiltration, or overflow to extract clear water for recycling. This method of washing and desliming is now prohibited. Current washing and desliming production lines primarily use mud-water pumps and valves to transport the mud-water to a storage tank for collection. A pre-mixed flocculant is then quantitatively added to the condensate tank via manual or automatic programmable control, causing rapid sedimentation and yielding supernatant suitable for recycling. This supernatant is then quantitatively pumped out for washing ore or sand. The sludge settled at the bottom is pumped into a plate filter press for solid-liquid filtration separation, obtaining some filter water that can be reused in production and dewatered soil. The dewatered soil is then transported off-site for recycling, thus achieving rapid sedimentation and separation of mud and water. However, excessive addition of flocculants not only increases the cost of mud-water separation but also causes adverse environmental consequences. Therefore, to overcome the adverse consequences caused by the need to add flocculants during the production process in existing technologies, this paper studies a ore washing mud-water solid-liquid separation filter press water circulation system with lower operating costs, less solid-liquid separation pollution, and a greener environment. This system can be applied to the washing process of mud attached to ore or sand and gravel to quickly precipitate and separate supernatant water, minimizing water consumption. Summary of the Invention

[0003] The purpose of this invention is to provide a solid-liquid separation and filter press water recycling system and method for washing sludge. In this invention, each sludge settling tank allows for independent sedimentation, achieving natural settling without the need for movement and preventing sludge overflow. This clearly solves the problems of unstable effluent and inability to operate continuously in a closed loop in traditional sedimentation tanks, achieving a high proportion of sludge washing water recycling and near-zero discharge. To achieve the above objectives, this invention adopts the following technical solution: According to one aspect of the present invention, a solid-liquid separation filter press water circulation system for ore washing mud is provided. The system further includes a filter press, a mud collection tank, a first filter water collection tank and a second filter water collection tank respectively connected to the inlet side of the ore washing machine, and a plurality of parallel mud-water settling tanks connected to the outlet end of the ore washing machine. The mud outlet of each settling tank is connected to the mud inlet of the mud collection tank, the mud outlet of the mud collection tank is connected to the mud inlet of the filter press, the outlet of the filter press is connected to the return inlet of the first filter water collection tank and the return inlet of the second filter water collection tank, and the upper clear water outlet of the settling tank... The end is connected to the inlet end of the ore washing machine; the solid-liquid separation pressure filtration water circulation system also includes a controller, an external water supply main pipe is provided at the top inlet of the first filtration water collection tank, an external water supply control valve is provided on the external water supply pipe, a filtration water connecting pipe is provided between the middle of the first filtration water collection tank and the middle of the second filtration water collection tank, a first branch water supply valve is provided on the clean water connecting pipe near the middle of the first filtration water collection tank, a second branch water supply valve is provided on the clean water connecting pipe near the middle of the second filtration water collection tank, and a filtration water delivery pipe connected to the inlet side of the ore washing machine is provided on the filtration water connecting pipe between the first branch water supply valve and the second branch water supply valve.

[0004] A mud-water collection tank is installed on one side of the outlet of the ore washing machine. The internal volume of the mud-water collection tank is more than 1.5 times that of each mud-water settling tank. A water supply branch pipe connected to the external water supply main pipe is installed at the top of the mud-water collection tank. The inlet end of the mud-water collection tank is connected to the outlet end of the ore washing machine through a first mud-water main pipe. A second mud-water main pipe is installed from the outlet end of the mud-water collection tank to the inlet end at the top of each mud-water settling tank. A mud-water pump connected to the second mud-water main pipe is installed in the mud-water collection tank. Mud-water branch pipes connected to the inlet end of each mud-water settling tank are installed on the second mud-water main pipe. A clean water delivery main pipe is installed between the upper clean water outlet end of each mud-water settling tank and the water inlet end of the ore washing machine. The upper clean water outlet end of each mud-water settling tank is connected to the clean water delivery main pipe through clean water branch pipes.

[0005] In a further preferred embodiment of the above scheme, a water filter pump is installed on the ore washing water supply pipe, the electrical control terminal of the water filter pump is electrically connected to the control terminal of the controller, and the external water supply control valve, the first branch water supply valve and the second branch water supply valve are respectively electrically connected to the controller.

[0006] In a further preferred embodiment of the above scheme, a main mud conveying pipe is provided between the mud outlet at the bottom of each mud-water settling tank and the mud inlet of the mud collection tank. A mud branch pipe is connected between the mud outlet at the bottom of each mud-water settling tank and the main mud conveying pipe. A mud electrically controlled ball valve is provided on each mud branch pipe. A mud pump is provided on the main mud conveying pipe near the mud collection tank. A first mud position sensor is provided near the mud collection tank. The mud electrically controlled ball valve, the mud pump, and the first mud position sensor are electrically connected to the controller.

[0007] In a further preferred embodiment of the above scheme, a return pipe is provided between the first mud and water main pipe at the inlet end of the mud and water collection tank and the second mud and water main pipe at the outlet end of the mud and water collection tank, and a one-way return valve is provided on the return pipe for unidirectional flow from the second mud and water main pipe to the first mud and water main pipe.

[0008] In a further preferred embodiment of the above scheme, the filter press includes a first filter press and a second filter press arranged in parallel. The slurry inlet of the first filter press is connected to the first slurry outlet of the slurry collection tank through a first slurry outlet pipe, and the water outlet of the first filter press is connected to the return water inlet of the first filter water collection tank. The slurry inlet of the second filter press is connected to the second slurry outlet of the slurry collection tank through a second slurry outlet pipe, and the water outlet of the second filter press is connected to the return water inlet of the second filter water collection tank. A first slurry valve and a first slurry pump are sequentially installed on the first slurry outlet pipe between the first slurry outlet of the slurry collection tank and the slurry inlet of the first filter press. A second slurry valve and a second slurry pump are sequentially installed on the second slurry outlet pipe between the second slurry outlet of the slurry collection tank and the slurry inlet of the second filter press.

[0009] In a further preferred embodiment of the above scheme, upper and lower liquid level sensors at different heights are installed inside the water settling tank. A mud discharge pipe is installed at the mud outlet at the bottom of each mud-water settling tank. A second mud position sensor is installed near the bottom of each mud-water settling tank. One end of the mud-water settling tank extends into the bottom of the mud-water settling tank, and the other end extends out of the bottom of the mud-water settling tank. Multiple interconnected mud pumping pipes are arranged at intervals on the outer peripheral wall of the mud discharge pipe located at the bottom of the mud-water settling tank. Cross-shaped mud pumping holes are respectively provided on the outer peripheral wall of the mud discharge pipe located at the bottom of the mud-water settling tank and on the peripheral wall of the mud pumping pipe.

[0010] According to another aspect of the present invention, the present invention provides a method for recycling filtration water from solid-liquid separation of ore washing mud. The method for recycling filtration water from solid-liquid separation of ore washing mud using the ore washing mud solid-liquid separation filtration water recycling system of the present invention includes the following steps: First, determine the number of mud and water settling tanks 5 based on the amount of mud and water discharged by the washing machine per hour (Q). Set the mud and water settling tank queue number according to the order of water extraction. Before the washing machine performs water washing and desludge removal, fill the first and second filter water collection tanks with half of the clean water used for washing the washing machine through the external water supply main pipe. Keep the mud collection tank empty. Turn on the mud and water electric control ball valve and mud and water pump. When filling each mud and water settling tank with clean water through the mud and water collection tank, the water stored in the mud and water collection tank shall not exceed one-third of the effective volume inside the mud and water collection tank or shall be kept empty. Then, stop supplying water to the mud and water collection tank through the external water supply main pipe. The first sludge settling tank is selected from the queue of sludge settling tanks filled with sludge. After the washing machine, filter press, and sludge settling tank are started, the clean water in the first sludge settling tank is extracted in sequence and transported to the washing machine to provide clean water for cleaning and desludge removal. The clean water extraction time is set to T2 and the sludge extraction time is set to T3. At the same time, it is determined whether the clean water extraction time T2 exceeds the preset clean water extraction time T. 20 If the preset clean water extraction time T is... 20 If the clean water extraction operation is not completed, an alarm message will be issued; The cleaned mud slurry flows into a mud-water collection tank for collection and sedimentation. Once the clean water from the first mud-water settling tank is extracted, the mud slurry in the first settling tank is immediately pumped into a mud collection pond for collection and sedimentation. Simultaneously, it is determined whether the mud extraction time T3 exceeds the preset mud extraction time T. 30 If the preset mud extraction time T is exceeded... 30 If the mud extraction operation is not completed, an alarm message will be issued. Next, clean water will be extracted from the second mud-water settling tank and transported to the ore washing machine to provide clean water for the ore washing machine to clean and deslim. At the same time, mud water in the mud-water collection tank will be extracted to the first mud-water settling tank for sedimentation. When the first mud-water settling tank is full of mud water, a minimum sedimentation time T will be set. When the minimum sedimentation time T is reached, the next clean water extraction operation is allowed. The mud in the mud collection tank is pumped to the filter press for solid-liquid filtration separation. The clean water separated by filtration is sent to the first filter water collection tank and the second filter water collection tank for recycling. The first filter water collection tank and the second filter water collection tank respectively provide clean water to the ore washing machine. This cycle is repeated to recycle the cleaning and desludge water of the ore washing machine.

[0011] A further preferred embodiment of the above scheme, determining the number of sludge settling tanks based on the hourly sludge volume Q discharged by the ore washing machine, includes the following steps: Step 11: Determine the flow rate Q of mud and water discharged by the washing machine (10) per small water wash and the effective volume a inside a single mud and water settling tank (5). Then, the mud and water loading time T1 required to fill a single mud and water settling tank (5) is satisfied as follows: T1 = a × 60 / Q, and the unit of time T1 is minutes. Step 12: Obtain the minimum settling time T required for a single sludge settling tank (5) to be filled with sludge until complete sedimentation to form supernatant water and lower sludge, the supernatant water extraction time T2, and the sludge extraction time T3; then the number N of sludge settling tanks (5) satisfies: N≥1+(T+T2+T3) / T1; N is the minimum number of mud and water settling tanks (5), and the integer N0≥N is taken as the actual number of tanks.

[0012] In summary, due to the adoption of the above technical solutions, the present invention has the following significant effects: (1) The present invention ensures continuous production by rotating multiple mud and water settling tanks, avoiding the risk of machine shutdown and interruption during the washing and desliming process; each mud and water settling tank settles independently, and the settling process achieves natural settling without the need for movement and mud and water do not overflow. (2) During the sedimentation process in each sludge settling tank, flocculants are added to quickly achieve solid-liquid separation and obtain a clear supernatant. The sludge extracted from the sludge settling tank is filtered by pressure, and the resulting filtrate is recycled. The water recycling rate is high, the degree of automation is high, and the operation is reliable. This invention solves the problems of unstable effluent and inability to operate continuously in closed loop in traditional sedimentation tanks, and realizes a high proportion of sludge washing water recycling and near-zero discharge. Attached Figure Description

[0013] Figure 1 This is a system schematic diagram of a ore washing mud water solid-liquid separation pressure filter water circulation system according to the present invention; Figure 2 A schematic diagram of the sludge settling tank of the present invention; Figure 3 This is a schematic diagram of the mud and water discharge pipe of the present invention.

[0014] Figure 4 This is a top view of the mud and water discharge pipe of the present invention.

[0015] Figure 5 This is a schematic diagram of the installation distribution and circulation control of the sludge settling tank of the present invention; In the attached diagram, 1 is a filter press, 2 is a mud collection tank, 3 is a first filter water collection tank, 4 is a second filter water collection tank, 5 is a mud-water settling tank, 5a is a mud-water discharge pipe, 5b is a mud pumping pipe, 5c is a cross-shaped mud pumping hole, 6 is a mud-water collection tank, 8 is a controller, 9 is an alarm, 10 is a ore washing machine, 20 is a mud conveying main pipe, 21 is a mud branch pipe, 22 is a mud electric control ball valve, 24 is a first mud position sensor, 23 is a mud pump, 30 is an external water supply main pipe, 30a is an external water supply control valve, 30b is a water supply branch pipe, 31 is a filter water connecting pipe, 32 is a first branch water supply valve, 33 is a second branch water supply valve, 34 is a filter water conveying pipe, and 5 is a filter water conveying system. Pump 34a, clean water main pipe 50, clean water pump 50a, clean water branch pipe 51, clean water electrically controlled ball valve 52, upper liquid level sensor 53, lower liquid level sensor 54, second mud position sensor 55, mud-water electrically controlled ball valve 63, first mud-water main pipe 60, return pipe 60a, one-way return valve 60b, second mud-water main pipe 61, mud-water branch pipe 62, first filter press 100, first mud output pipe 100a, first slurry valve 100b, first slurry pump 100c, second filter press 101, second mud output pipe 101a, second slurry valve 101b, second slurry pump 101c. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, preferred embodiments will be listed below with reference to the accompanying drawings to provide a clear and complete description of the invention. However, it should be noted that the examples in the specification are preferred examples, not all examples. Furthermore, many details listed in the specification are merely to provide the reader with a deep understanding of the key issues of this invention; the invention can be implemented even without these specific details.

[0017] Combination Figure 1 , Figure 2 , Figure 3This invention provides a solid-liquid separation and filter press water circulation system for ore washing sludge. The system further includes a filter press 1, a sludge collection tank 2, a first filter water collection tank 3 and a second filter water collection tank 4 respectively connected to the inlet side of the ore washing machine 10, and multiple parallel sludge settling tanks 5 connected to the outlet end of the ore washing machine 10. The filter press 1 is a plate-and-tube type filter press. A sludge collection tank 6 is provided on the outlet side of the ore washing machine 10, and the internal volume of the sludge collection tank 6 is the volume of each sludge settling tank 5. The mud outlet of each mud-water settling tank 5 is connected to the mud inlet of the mud collection tank 2. The mud outlet of the mud collection tank 2 is connected to the mud inlet of the filter press 1. The water outlet of the filter press 1 is connected to the return water inlet of the first filter water collection tank 3 and the return water inlet of the second filter water collection tank 4, respectively. The upper clear water outlet of the mud-water settling tank 5 is connected to the water inlet of the ore washing machine 10. The solid-liquid separation filter water circulation system also includes a controller 8 and an alarm 9. The alarm of the controller 8... The output terminal is connected to the alarm control terminal of the alarm 9. The controller 8 is a PLC controller, and the alarm 9 is an audible and visual alarm. An external water supply main pipe 30 is provided at the top inlet of the first water filter collection tank 3. An external water supply control valve 30a is provided on the external water supply pipe 30. A water filter connecting pipe 31 is provided between the middle of the first water filter collection tank 3 and the middle of the second water filter collection tank 4. A first branch water supply valve is provided on the filtered water connecting pipe 31 near the middle of the first water filter collection tank 3. 32. A second branch water supply valve 33 is installed on the clean water connecting pipe 31 near the middle of the second filter water collection tank 4. A filter water supply pipe 34 is installed on the filter water connecting pipe 31 between the first branch water supply valve 32 and the second branch water supply valve 33, which is connected to the water inlet side of the ore washing machine 10 respectively. A filter water delivery pump 34a is installed on the ore washing water supply pipe 34. The filter water delivery pump 34a, the external water supply control valve 30a, the first branch water supply valve 32 and the second branch water supply valve 33 are electrically connected to the controller respectively.Before operating the ore washing machine 10, filter press 1, and sludge settling tank 5, the sludge settling tank 5 should be filled with clean water or mud slurry (the mud slurry should have completed sedimentation and contain both clear water and settled mud). The mud collection tank 2 should be kept empty. The total amount of clean water loaded in the first filter water collection tank 3 and the second filter water collection tank 4 should be at least the amount of clean water loaded in one sludge settling tank 5. After the ore washing machine 10, filter press 1, and sludge settling tank 5 are started, the clean water in the first sludge settling tank 5 is sequentially drawn and transported to the ore washing machine 10. 0. Clean water is provided for washing and desliming. The washed mud slurry flows to the mud-water collection tank 6 for collection and sedimentation. After the clean water in the first mud-water settling tank 5 is extracted, the mud in the first mud-water settling tank 5 is immediately extracted to the mud-water collection pool 2. After the mud slurry extraction is completed, the clean water in the second mud-water settling tank 5 is extracted and sent to the ore washing machine 10 to provide clean water for washing and desliming. At the same time, the mud slurry in the mud-water collection tank 6 is extracted to the first mud-water settling tank 5 for sedimentation. When the second mud-water settling tank 5 is finished, the clean water in the second mud-water settling tank 5 is extracted and sent to the first mud-water settling tank 5 for sedimentation. After the clean water in tank 5 is completely extracted, the slurry in the second mud-water settling tank 5 is immediately pumped into the mud collection tank 2. After the slurry in the second mud-water settling tank 5 is completely extracted, the clean water in the third mud-water settling tank 5 is then pumped to the ore washing machine 10, and at the same time, the slurry water in the mud-water collection tank 6 is pumped into the second mud-water settling tank 5 for sedimentation. The slurry in the mud collection tank 2 is then pumped to the filter press 1 for solid-liquid filtration separation, obtaining some filter water that can be reused in production and water suitable for brick making, landscaping, and soil treatment. The improved flocculant-free mud cake is filtered and the clean water is sent to the first filter water collection tank 3 and the second filter water collection tank 4 for recycling. The first filter water collection tank 3 and the second filter water collection tank 4 respectively provide clean water to the ore washing machine 10. This cycle is repeated to recycle the sludge water after the ore washing machine 10 has finished cleaning. By setting up multiple mud and water settling tanks 5, the mud and water can be allowed to settle for a sufficient time before the clean water is extracted for use. The mud and water generated during the production process of the ore washing machine 10 can be quickly separated by solid-liquid filtration without the addition of flocculants.

[0018] In this invention, a water supply branch pipe 30b connected to the external water supply main pipe 30 is provided at the top of the mud and water collection tank 6. A water supply control valve 30c is provided on the water supply branch pipe 30b. When the external water supply control valve 30a, the first branch water supply valve 32, the second branch water supply valve 33, and the water supply control valve 30c are opened, external clean water can be supplied to the first filter water collection tank 3 and the second filter water collection tank 4 to provide clean water for washing and desliming of the ore washing machine 10, and clean water can be supplied to the mud and water collection tank 6 to supply clean water to the mud and water settling tank 5. When the filter water conveying pump 34a is opened, the first branch water supply valve 32 is closed, and the second branch water supply valve 33 is opened, external clean water can be supplied to the first filter water collection tank 3 and the second filter water collection tank 4 to provide clean water for washing and desliming of the ore washing machine 10, and clean water can be supplied to the mud and water collection tank 6 to supply clean water to the mud and water settling tank 5. Water valve 33 or opening the first branch water supply valve 32 and closing the second branch water supply valve 33 can respectively provide clean water for washing and desliming to the ore washing machine 10. When the filter water conveying pump 34a is opened and the first branch water supply valve 32 and the second branch water supply valve 33 are opened simultaneously, clean water for washing and desliming can be provided to the ore washing machine 10 at the same time. The inlet end of the mud and water collection tank 6 is connected to the outlet end of the ore washing machine 10 through the first mud and water main pipe 60. A second mud and water main pipe 61 is arranged along the outlet end of the mud and water collection tank 6 to the inlet end of the top of each mud and water settling tank 5. A mud and water pump 7 connected to the second mud and water main pipe 61 is installed in the mud and water collection tank 6. The second main slurry pipe 61 is equipped with slurry branch pipes 62 that connect to the inlet end of each slurry settling tank 5. A clean water conveying main pipe 50 is installed between the upper clean water outlet end of each slurry settling tank 5 and the water inlet end of the washing machine 10. The upper clean water outlet end of each slurry settling tank 5 is connected to the clean water conveying main pipe 50 through the clean water branch pipes 51. An upper clean water conveying pump 50a is installed on the clean water conveying main pipe 50. A clean water electrically controlled ball valve 52 is installed on each clean water branch pipe 51, and a slurry electrically controlled ball valve 63 is installed on each slurry branch pipe 62. The slurry pump 7, the clean water conveying pump 50a, and the clean water... The electrically controlled ball valve 52 and the mud and water electrically controlled ball valve 63 are electrically connected to the controller. In this invention, a return pipe 60a is provided between the first mud and water main pipe 60 at the inlet end of the mud and water collection tank 6 and the second mud and water main pipe 61 at the outlet end of the mud and water collection tank 6. A one-way return valve 60b is provided on the return pipe 60a, which allows the water to flow unidirectionally from the second mud and water main pipe 61 to the first mud and water main pipe 60. When mud and water are transported into each mud and water settling tank 5, the excess water flows unidirectionally back to the first mud and water main pipe 60 through the one-way return valve 60b on the second mud and water main pipe 61 and the return pipe 60a, and then flows back to the mud and water collection tank 6 through the first mud and water main pipe 60.When the controller outputs an open control signal to the mud pump 7 and the mud electric ball valve 63 at the top of each mud settling tank 5, the mud slurry water in the mud collection tank 6 is delivered to each mud settling tank 5. After the mud settling tank 5 is full of mud slurry water, the controller outputs a close control signal to close the mud electric ball valve 63 of the mud settling tank 5 that is currently loading mud slurry water. After all mud settling tanks 5 are full, the mud pump 7 is turned off. When providing clean water for washing and desliming to the washing machine 10, the controller outputs an open control signal to the clean water delivery pump 50a and the clean water electric ball valve 52 at the clean water outlet of the mud settling tank 5, and delivers the clean water in the mud settling tank 5 to the washing machine 10 to provide clean water for washing and desliming.

[0019] In this invention, a slurry conveying main pipe 20 is provided between the slurry outlet at the bottom of each slurry settling tank 5 and the slurry inlet of the slurry collection tank 2. A slurry branch pipe 21 is connected between the slurry outlet at the bottom of each slurry settling tank 5 and the slurry conveying main pipe 20. A slurry electrically controlled ball valve 22 is provided on each slurry branch pipe. A slurry pump 23 is provided on the slurry conveying main pipe 20 near the slurry collection tank 2. A slurry position sensor 24 is provided near the slurry collection tank 2. The slurry electrically controlled ball valve 22 and the slurry pump 23 are also mentioned. 3 and mud position sensor 24 are electrically connected to the controller respectively; when the controller outputs mud delivery command, the mud pump 23 is opened and the mud electric ball valve 22 at the mud outlet position at the bottom of the mud-water settling tank 5 is opened, and the mud inside the mud-water settling tank 5 is delivered to the mud collection tank 2 through the mud branch pipe 21 and the mud delivery main pipe 20. When the mud inside the mud collection tank 2 reaches the position of the mud position sensor 24, the mud is delivered to the filter press 1 for solid-liquid filtration separation to obtain some filter water and mud cake that can be reused in production.

[0020] In this invention, the filter press 1 includes a first filter press 100 and a second filter press 101 arranged in parallel. The filter press 1 includes the first filter press 100 and the second filter press 101. The slurry inlet of the first filter press 100 is connected to the first slurry outlet of the slurry collection tank 2 through a first slurry outlet pipe 100a, and the water outlet of the first filter press 100 is connected to the return water inlet of the first filter water collection tank 3. The slurry inlet of the second filter press 101 is connected to the second slurry outlet of the slurry collection tank 2 through a second slurry outlet pipe 101a, and the water outlet of the second filter press 101 is connected to the return water inlet of the second filter water collection tank 4. A first slurry valve 100b and a first slurry pump 100c are sequentially arranged on the first slurry outlet pipe 100a between the first slurry outlet of the slurry collection tank 2 and the slurry inlet of the first filter press 100. A second slurry outlet pipe 101a, connecting the second slurry outlet of the slurry collection tank 2 to the slurry inlet of the second filter press 101, is sequentially equipped with a second slurry valve 101b and a second slurry pump 101c. The first filter press 100 and the second filter press 101 are plate and chamber filter presses, each with a filtration area of ​​500 m². 3 Each filter press has a total volume of 8.5m³ during filtration. 3 The flow rates of the first slurry pump 100c and the second slurry pump 101c are 30 m³ / s. 3 / h, pressure 0.8~1.2KPa, the controller is electrically connected to the first slurry pump 100c and the second slurry pump 101c through corresponding frequency converters, and the controller is also electrically connected to the first slurry valve 100b and the second slurry valve 101b respectively. When the slurry position sensor 24 inside the slurry collection tank 2 detects that the slurry has reached that position, the controller cyclically outputs control signals to the first slurry valve 100b and the first slurry pump 100c to open them and deliver slurry to the first filter press 100. The first filter press 100 presses... The filtered water is transported to the first filter water collection tank 3 for storage, and a control signal is output to the second filter slurry valve 101b and the second filter slurry pump 101c to open them and transport slurry to the second filter press 101. The filtered water output from the second filter press 101 is transported to the second filter water collection tank 4 for storage. The two filter presses thus separate the slurry into filtered water and filter cake. The filtered water output is collected through the filter water collection tanks. Thus, the water loss due to the washing sand and filter cake can be replenished by external water supply, providing sufficient water for washing and desludge removal in a timely manner.

[0021] In this invention, upper liquid level sensors 53 and lower liquid level sensors 54 at different heights are installed inside the water settling tank 5. A mud discharge pipe 5a is installed at the mud outlet at the bottom of each mud settling tank 5. A second mud position sensor 55 is installed near the bottom of each mud settling tank 5. The upper liquid level sensor 53 detects the mud and water signal at the top position inside the mud settling tank 5 in real time. When the mud and water are loaded to this position, the loading of mud and water is stopped. The controller 8 collects the position height signal of the mud and water loaded into the mud settling tank 5 through the upper liquid level sensor 53, and the controller 8 determines whether the mud and water are loaded within the preset mud and water loading time T1. If the tank is not full, the controller 8 sends an alarm control signal to the alarm device 9 to alert the system and check for malfunctions. The controller 8 uses the lower liquid level sensor 54 to collect and detect the water level signal inside the mud and water settling tank 5 in real time. The controller 8 determines whether the water has been completely extracted within the preset water extraction time T2. If not, the controller 8 sends an alarm control signal to the alarm device 8 to alert the system and check for malfunctions. The controller 8 then outputs the next water extraction control signal to extract water from the next mud and water settling tank 5 to provide clean water for the washing machine 10 to clean and desludge. The controller collects the mud position signal inside the mud-water settling tank 5 in real time through the second mud position sensor 55. If the mud inside the mud-water settling tank 5 is not completely pumped out within the set time, the controller 8 outputs an alarm control signal to the alarm device 8 to remind the user and check whether there is a malfunction in the electric ball valve and other related components. One end of the mud and water settling tank 5 extends into the bottom of the mud and water settling tank 5, and the other end of the mud and water settling tank 5 extends out of the bottom of the mud and water settling tank 5. Multiple interconnected mud pumping pipes 5b are arranged at intervals on the outer peripheral wall of the mud and water discharge pipe 5a located at the bottom of the mud and water settling tank 5. Cross-shaped mud pumping holes 5c are respectively arranged on the outer peripheral wall of the mud and water discharge pipe 5a located at the bottom of the mud and water settling tank 5 and on the peripheral wall of the mud pumping pipe 5b. When the controller 8 outputs a slurry pumping control signal to the slurry pump 23 and the slurry electric ball valve 22, the slurry pump 23 starts and controls the corresponding slurry electric ball valve 22 at the bottom of each slurry settling tank 5 to open at set intervals, sequentially pumping out the slurry inside each slurry settling tank 5. The slurry flows through the cross-shaped slurry pumping hole 5c on the slurry discharge pipe 5a to the slurry branch pipe 21 and is pumped into the slurry collection tank 2 via the slurry conveying main pipe 20. The controller collects the slurry position signal inside the slurry settling tank 5 in real time through the second slurry position sensor 55. If the slurry inside the slurry settling tank 5 is not completely pumped out within the set time, the controller 8 outputs an alarm control signal to the alarm device 8 to remind the user and check whether the electric ball valve and other related components are malfunctioning.

[0022] According to another aspect of the present invention, the present invention provides a method for recycling filtration water from solid-liquid separation of ore washing sludge, the recycling method comprising the following steps: First, the number of mud-water settling tanks 5 is determined based on the amount of mud-water Q discharged per small water wash of the ore washing machine 10. The mud-water settling tanks 5 are numbered according to the order in which clean water is extracted. Before the ore washing machine 10 performs water washing and desludge removal, half of the clean water for cleaning the ore washing machine 10 is filled into the first filter water collection tank 3 and the second filter water collection tank 4 through the external water supply main pipe 30. The mud collection tank 2 is kept empty. The mud-water electric control ball valve 63 and the mud-water pump 7 are opened. When each mud-water settling tank 5 is filled with clean water through the mud-water collection tank 6, the water stored in the mud-water collection tank 6 does not exceed one-third of the effective internal volume of the mud-water collection tank 6, or the tank remains empty. Then, the external water supply main pipe 30 is stopped from supplying water to the mud-water collection tank 6. In this invention, determining the number of mud-water settling tanks 5 based on the amount of mud-water Q discharged per small water wash of the ore washing machine 10 includes the following steps: Step 11: Obtain the flow rate Q of mud and water discharged from the washing machine 10 per small wash, and the effective volume a inside a single mud and water settling tank 5. Then, the mud and water loading time T1 required to fill a single mud and water settling tank 5 is satisfied as follows: T1 = a × 60 / Q, where the unit of time T1 is minutes; that is, the mud and water loading time when each mud and water settling tank 5 is filled with clean water is T1 (equivalent to the mud and water filling time). Step 12: Obtain the minimum settling time T required for a single sludge settling tank 5 to be filled with sludge until complete sedimentation to form supernatant water and lower sludge, the supernatant water extraction time T2, and the sludge extraction time T3; then the number N of sludge settling tanks 5 satisfies: N≥1+(T+T2+T3) / T1; N is the minimum number of sludge settling tanks 5, and the integer N0≥N is taken as the actual number of tanks; Next, the first mud-water settling tank (5) is selected from the queue of mud-water settling tanks (5). After the washing machine (10), filter press (1), and mud-water settling tank (5) are started, the clean water in the first mud-water settling tank (5) is extracted in sequence and transported to the washing machine (10) to provide clean water for the washing machine (10) to clean and desludge. The clean water extraction time is set to T2 and the mud extraction time is set to T3. At the same time, it is determined whether the size of the clean water extraction time T2 exceeds the preset clean water extraction time T. 20 If the preset clean water extraction time T is... 20 If the clean water extraction operation is not completed, an alarm message will be issued; The cleaned mud slurry flows into the mud-water collection tank for collection and sedimentation. Once the clean water in the first mud-water settling tank 5 is extracted, the mud slurry in the first settling tank is immediately pumped into the mud-water collection pool 2 for collection and sedimentation. Simultaneously, it is determined whether the mud extraction time T3 exceeds the preset mud extraction time T. 30 If the preset mud extraction time T is exceeded... 30 If the mud extraction operation is not completed, an alarm message will be issued; then, the clean water in the second mud and water settling tank 5 will be extracted and transported to the washing machine 10 to provide clean water for the washing machine 10 to clean and desludge, and at the same time, the mud water in the mud and water collection tank 6 will be extracted to the first mud and water settling tank 5 for sedimentation. When the first mud and water settling tank (5) is full of mud water, the minimum sedimentation time T will be set. When the minimum sedimentation time T is reached, the next clean water extraction operation will be allowed. Finally, the mud in the mud collection tank 2 is pumped to the filter press 1 for solid-liquid filtration separation. The clean water separated by filtration is sent to the first filter water collection tank 3 and the second filter water collection tank 4 for recycling. Thus, the first filter water collection tank 3 and the second filter water collection tank 4 respectively provide clean water to the ore washing machine 10. In this way, the ore washing machine 10 completes the cleaning and desludge removal water recycling.

[0023] In this invention, combined with Figure 1 , Figure 2 and Figure 5 The process of recycling filtration water from solid-liquid separation of ore washing mud in this invention is further described. Taking eight mud-water settling tanks as an example, the mud-water settling tanks 5 are numbered 5G1 to 5G8 according to the order in which clean water is extracted. The mud-water electrically controlled ball valves 63 installed on the mud-water branch pipe 62 at the top of each mud-water settling tank 5 are numbered 63F1 to 63F8; the clean water electrically controlled ball valves 52 installed on the clean water branch pipe 51 at the upper clean water outlet end of each mud-water settling tank 5 are numbered 52F1 to 52F8; and the mud slurry electrically controlled ball valves 22 installed on the mud slurry branch pipe 21 at the mud slurry outlet at the bottom of each mud-water settling tank 5 are numbered 22F1 to 22F8. The following circulation control is performed: (a) Sludge and water entering the tank stage: Open the sludge and water electric ball valves 63F1 to 63F8 of the currently designated sludge and water settling tank 5 to allow the sludge and water to flow into the designated sludge and water settling tank 5 at a flow rate Q. When the sludge and water reach the full tank set value (upper liquid level sensor 53) or the sludge and water flow time reaches T1=60a / Q minutes, close the corresponding sludge and water electric ball valves 63F1 to 63F8. (b) Sludge settling stage: All valves on sludge settling tank 5 shall be kept closed and the settling time shall not be less than the preset minimum settling time of T minutes; (c) Supernatant extraction stage: Open the corresponding clean water electric ball valves 52F1 to 52F8 on the current mud and water settling tank 5 to extract the upper layer of clean water in the current mud and water settling tank 5 into the clean water conveying main pipe 50 and transport it to the washing machine 10 for water washing and desliming. The clean water extraction lasts for T2 minutes. (d) Mud extraction stage: Open the mud electric control ball valves 22F1 to 22F8 on the current mud settling tank 5 to extract the settled mud in the mud settling tank 5 and discharge it into the mud delivery main pipe 20 and transport it to the mud collection tank 2. The mud extraction lasts for T3 minutes. (e) Reset: Close the corresponding mud electric control ball valves 22F1 to 22F8, mark the current mud and water settling tank 5 as an empty tank, and prepare to pump mud and water again; The controller is also configured to allow only one mud-water settling tank 5 to be in the mud-water extraction stage at any given time, and to sequentially extract the designated mud-water settling tank 5 with N-1 tanks in a preset order as the current clean water extraction tank; and the N-1 tanks satisfy the following relationship: N-1≥(T+T2+T3) / T1; In this invention, the specific steps of the liquid separation and filtration water recycling process are as follows: (1) The washing machine 10, the clean water conveying pump 50a, the filter water conveying pump 34a, and the clean water electric control ball valve 52F1 are opened, and the mud and water settling tank 5G1 starts to pump clean water into the washing machine 10. At the end of the first clean water extraction time T2, the clean water electric control ball valve 52F1 is automatically closed (the clean water inside the mud and water settling tank 5G1 is dropped), the clean water electric control ball valve 52F2 and the mud electric control ball valve 22F1 are opened at the same time, and at the end of the mud extraction time T3, the mud electric control ball valve 22F1 is closed (the mud in the mud and water settling tank 5G1 is pumped out), the mud pump 7 and the mud and water electric control ball valve 63F1 are opened at the same time. At this time, after the mud and water settling tank 5G1 is emptied, mud and water begin to enter from the mud and water collection tank 6, and some clean water is pumped out of the mud and water settling tank 5G2. (2) The clean water electric ball valve 52F2 is closed, while the clean water electric ball valve 52F3 and the mud electric ball valve 22F2 are opened simultaneously. The mud electric ball valve 22F2 and the mud-water electric ball valve 63F1 are closed simultaneously, and the mud-water electric ball valve 63F2 is opened simultaneously. At this time, the mud-water settling tank 5G1 is full of mud-water, and the mud-water settling tank 5G2 has been emptied and begins to receive mud-water. Some clean water is pumped out of the mud-water settling tank 5G3. This cycle is controlled in this way. The clean water electric ball valve 52F7 is closed, while the clean water electric ball valve 52F8 and the mud electric ball valve 22F7 are opened simultaneously. This continues until the mud electric ball valve 22F7 and the mud-water electric ball valve 63F6 are closed simultaneously. Simultaneously, the electrically controlled ball valve 63F7 opens. At this time, the mud-water settling tank 5G8 is full of mud-water. After the mud-water settling tank 5G7 is emptied, mud-water begins to enter. Some of the clean water in the mud-water settling tank 5G8 is pumped out. After the clean water in the mud-water settling tank 5G8 is pumped out, the clean water electrically controlled ball valve 52F8 closes, and the clean water electrically controlled ball valve 52F1 and the mud electrically controlled ball valve 22F8 open simultaneously. At this time, the sedimentation time of the mud-water in the mud-water settling tank 5G1 reaches the preset sedimentation time T. The clean water in the mud-water settling tank 5G1 can be pumped to the ore washing machine 10, and the mud in the mud-water settling tank 5G8 can also be pumped out. After the mud in the mud-water settling tank 5G8 is completely pumped out, the mud electrically controlled ball valve 22F8 closes. Valves 22F8 and slurry electric ball valve 63F7 are simultaneously closed, while slurry electric ball valve 63F8 is simultaneously opened. At this time, slurry settling tank 5G7 is full of slurry, and after slurry is pumped out of slurry settling tank 5G8, slurry begins to flow into slurry collection tank 6. Meanwhile, some clean water is pumped out of slurry settling tank 5G1. This cycle is repeated, with slurry electric ball valves 63F1-63F8, clean water electric ball valves 52F1-52F8, and slurry electric ball valves 22F1-22F8 pumping clean water from slurry settling tanks 5G1-5G8 one by one to the washing machine 10 for washing and desliming, and after pumping out all the slurry, it is transferred to slurry collection tank 2. After the muddy water settles in the muddy water settling tanks 5G1 to 5G8 for a preset settling time T (in minutes), it can proceed to the next clear water extraction. As can be seen from the above, the time interval from when the muddy water settling tank 5G1 is filled with muddy water and begins to settle to when the clear water is extracted in the new round is at least the settling time T (in minutes). The time interval from when the muddy water settling tank 5G2 is filled with muddy water and begins to settle to when the clear water is extracted in the new round is at least the settling time T (in minutes). This means that in each cycle, the muddy water in each muddy water settling tank has settled for more than T minutes, so that each muddy water settling tank can obtain higher quality clear water.

[0024] Therefore, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A ore washing sludge solid-liquid separation filter press water circulation system, comprising a filter press (1) and an ore washing machine (10), characterized in that: The solid-liquid separation filter press water circulation system also includes a mud collection tank (2), a controller (8), a first filter water collection tank (3) and a second filter water collection tank (4) respectively connected to the water inlet side of the washing machine (10), and a plurality of parallel mud-water settling tanks (5) connected to the outlet end of the washing machine (10). The mud outlet of each mud-water settling tank (5) is connected to the mud inlet of the mud collection tank (2), the mud outlet of the mud collection tank (2) is connected to the mud inlet of the filter press (1), the water outlet of the filter press (1) is connected to the return water inlet of the first filter water collection tank (3) and the return water inlet of the second filter water collection tank (4), and the clear water outlet of the mud-water settling tank (5) is connected to the water inlet end of the washing machine (10). An external water supply main pipe (30) is provided at the top water inlet of the first filter water collection tank (3). An external water supply control valve (30a) is provided on the external water supply pipe (30). A filter water connecting pipe (31) is provided between the middle of the first filter water collection tank (3) and the middle of the second filter water collection tank (4). A first branch water supply valve (32) is provided on the filter clean water connecting pipe (31) near the middle of the first filter water collection tank (3). A second branch water supply valve (33) is provided on the clean water connecting pipe (31) near the middle of the second filter water collection tank (4). A filter water supply pipe (34) is provided on the filter water connecting pipe (31) between the first branch water supply valve (32) and the second branch water supply valve (33), which is connected to the water inlet of the washing machine (10). The external water supply control valve (30a), the first branch water supply valve (32) and the second branch water supply valve (33) are electrically connected to the controller (8).

2. The ore washing sludge solid-liquid separation pressure filtration water circulation system according to claim 1, characterized in that: A water filter pump (34a) is installed on the ore washing water pipeline (34), and the electrical control terminal of the water filter pump 34a is electrically connected to the control terminal of the controller (8).

3. The ore washing sludge solid-liquid separation pressure filtration water circulation system according to claim 1, characterized in that: A mud and water collection tank (6) is provided on one side of the outlet of the washing machine (10). The internal volume of the mud and water collection tank (6) is more than 1.5 times that of each mud and water settling tank (5). A water supply branch pipe (30b) connected to the external water supply main pipe (30) is provided at the top of the mud and water collection tank (6). The inlet end of the mud and water collection tank (6) is connected to the outlet end of the washing machine (10) through a first mud and water main pipe (60). A second mud and water main pipe is arranged from the outlet end of the mud and water collection tank (6) to the inlet end of the top of each mud and water settling tank (5). Pipe (61), a mud pump (7) connected to the second mud main pipe (61) is installed in the mud collection tank (6), mud branch pipes (62) connected to the inlet end of each mud settling tank (5) are respectively installed on the second mud main pipe (61), and a clean water conveying main pipe (50) is installed between the upper clean water outlet end of each mud settling tank (5) and the water inlet end of the washing machine (10). The upper clean water outlet end of each mud settling tank (5) is connected to the clean water conveying main pipe (50) through the clean water branch pipe (51).

4. The ore washing sludge solid-liquid separation pressure filtration water circulation system according to claim 3, characterized in that: A clean water conveying pump (50a) is installed on the main clean water conveying pipe (50), a clean water electrically controlled ball valve (52) is installed on each clean water branch pipe (51), and a mud water electrically controlled ball valve (63) is installed on each mud water branch pipe (62). The mud water pump (7), the clean water conveying pump (50a), the clean water electrically controlled ball valve (52) and the mud water electrically controlled ball valve (63) are electrically connected to the controller.

5. The ore washing sludge solid-liquid separation pressure filtration water circulation system according to claim 4, characterized in that: A mud conveying main pipe (20) is provided between the mud outlet at the bottom of each mud-water settling tank (5) and the mud inlet of the mud collection tank (2). A mud branch pipe (21) is connected between the mud outlet at the bottom of each mud-water settling tank (5) and the mud conveying main pipe (20). A mud electric control ball valve (22) is provided on each mud branch pipe (21). A mud pump (23) is provided on the mud conveying main pipe (20) near the mud collection tank (2). A first mud position sensor (24) is provided near the mud collection tank (2). The mud electric control ball valve (22), mud pump (23) and first mud position sensor (24) are electrically connected to the controller.

6. The ore washing sludge solid-liquid separation pressure filtration water circulation system according to claim 3, characterized in that: A return pipe (60a) is provided between the first mud and water main pipe (60) at the inlet end of the mud and water collection tank (6) and the second mud and water main pipe (61) at the outlet end of the mud and water collection tank (6). A one-way return valve (60b) is provided on the return pipe (60a) so that the second mud and water main pipe (61) flows unidirectionally to the first mud and water main pipe (60).

7. A ore washing sludge solid-liquid separation pressure filtration water circulation system according to claim 1, characterized in that: The filter press (1) includes a first filter press (100) and a second filter press (101) arranged in parallel. The first filter press (100) and the second filter press (101) are connected in parallel. The slurry inlet of the first filter press (100) is connected to the first slurry outlet of the slurry collection tank (2) through a first slurry outlet pipe (100a). The water outlet of the first filter press (100) is connected to the return water inlet of the first filter water collection tank (3). The second filter press (100) is connected to the first slurry outlet of the first filter water collection tank (3). The mud inlet of the filter press (101) is connected to the second mud outlet of the mud collection tank (2) through the second mud outlet pipe (101a). The outlet of the second filter press (101) is connected to the return inlet of the second filter water collection tank (4). A first filter valve (100b) and a first filter pump (100c) are sequentially installed on the first mud outlet pipe (100a) between the first mud outlet of the mud collection tank (2) and the mud inlet of the first filter press (100). A second filter valve (101b) and a second filter pump (101c) are sequentially installed on the second mud outlet pipe (101a) between the second mud outlet of the mud collection tank (2) and the mud inlet of the second filter press (101).

8. A ore washing sludge solid-liquid separation pressure filtration water circulation system according to claim 1, 3, or 5, characterized in that: Inside the water settling tank (5), there are upper liquid level sensors (53) and lower liquid level sensors (54) at different heights. A mud discharge pipe (5a) is provided at the mud outlet at the bottom of each mud settling tank (5). A second mud position sensor (55) is provided near the bottom of each mud settling tank (5). One end of the mud settling tank (5) extends into the bottom of the mud settling tank (5), and the other end of the mud settling tank (5) extends out of the bottom of the mud settling tank (5). Multiple interconnected mud pumping pipes (5b) are provided at intervals on the outer peripheral wall of the mud discharge pipe (5a) located at the bottom of the mud settling tank (5). Cross-shaped mud pumping holes (5c) are provided at intervals on the outer peripheral wall of the mud discharge pipe (5a) located at the bottom of the mud settling tank (5) and on the peripheral wall of the mud pumping pipe (5b).

9. A method for recycling filter water from solid-liquid separation of ore washing mud, characterized in that: A ore washing sludge solid-liquid separation filter water recycling system according to any one of claims 1 to 8 realizes the recycling of sludge solid-liquid separation filter water, the recycling method comprising the following steps: First, determine the number of mud and water settling tanks 5 according to the amount of mud and water discharged by the washing machine (10) per hour. Set the mud and water settling tank (5) queue number according to the order of water extraction. Before the washing machine (10) performs water washing and desludge removal, fill half of the clean water for washing machine (10) into the first filter water collection tank (3) and the second filter water collection tank (4) through the external water supply main pipe (30). Keep the mud collection tank (2) empty. Open the mud and water electric control ball valve (63) and mud and water pump (7). When each mud and water settling tank (5) is filled with clean water through the mud and water collection tank (6), the water stored in the mud and water collection tank (6) shall not exceed one-third of the effective volume inside the mud and water collection tank (6) or shall be kept empty. Stop using the external water supply main pipe (30) to supply water to the mud and water collection tank (6). The first sludge settling tank (5) is selected from the queue of sludge settling tanks (5) filled with sludge. After the washing machine (10), filter press (1), and sludge settling tank (5) are started, the clean water in the first sludge settling tank (5) is extracted in sequence and transported to the washing machine (10) to provide clean water for the washing machine (10) to clean and desludge. The clean water extraction time is set to T2 and the sludge extraction time is set to T3. At the same time, it is determined whether the size of the clean water extraction time T2 exceeds the preset clean water extraction time T. 20 If the preset clean water extraction time T is... 20 If the clean water extraction operation is not completed, an alarm message will be issued; The cleaned mud slurry flows into the mud-water collection tank (6) for collection and sedimentation. After the clean water in the first mud-water settling tank (5) is extracted, the mud in the first mud-water settling tank (5) is immediately extracted to the mud collection pool (2) for mud collection and sedimentation. At the same time, it is determined whether the mud extraction time T3 exceeds the preset mud extraction time T. 30 If the preset mud extraction time T is exceeded... 30 If the mud extraction operation is not completed, an alarm message will be issued. After the mud extraction is completed, the mud and water will be settled for a settling time of T. Next, the clean water in the second mud and water settling tank (5) will be pumped to the washing machine (10) to provide clean water for the washing machine (10) to clean and desludge. At the same time, the mud and water in the mud and water collection tank (6) will be pumped to the first mud and water settling tank (5) for settling. When the first mud and water settling tank (5) is full of mud and water, the minimum settling time T will be set. When the minimum settling time T is reached, the next clean water extraction operation will be allowed. The mud in the mud collection tank (2) is drawn to the filter press (1) for solid-liquid filtration separation. The clean water separated by filtration is sent to the first filter water collection tank (3) and the second filter water collection tank (4) for recycling. The first filter water collection tank (3) and the second filter water collection tank (4) respectively provide clean water to the ore washing machine (10). In this way, the ore washing machine (10) completes the cleaning and desludge removal water recycling.

10. A method for recycling filtration water from solid-liquid separation of ore washing mud according to claim 9, characterized in that: The number of mud-water settling tanks (5) is determined based on the amount of mud-water discharged per hour by the washing machine (10) as follows: Step 11: Determine the flow rate Q of mud and water discharged by the washing machine (10) per small water wash and the effective volume a inside a single mud and water settling tank (5). Then, the mud and water loading time T1 required to fill a single mud and water settling tank (5) is satisfied as follows: T1 = a × 60 / Q, and the unit of time T1 is minutes. Step 12: Obtain the minimum settling time T required for a single sludge settling tank (5) to be filled with sludge until complete sedimentation to form clear water and sludge, the clear water extraction time T2, and the sludge extraction time T3; then the number N of sludge settling tanks 5 satisfies: N≥1+(T+T2+T3) / T1; N is the minimum number of mud and water settling tanks (5), and the integer N0≥N is taken as the actual number of tanks.

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