Uniform discharging control system and method for laterite-nickel ore washing line

Abstract

The invention belongs to the technical field of laterite-nickel ore washing, and discloses a uniform discharging control system and method.The uniform discharging control system of the laterite-nickel ore washing line comprises a current signal collecting module, a judging module and a feeding speed control module, and the current signal collecting module is used for being connected with a motor of a belt conveyor; obtaining a motor current value of the belt conveyor; the judgment module is used for judging a threshold interval in which a motor current value of the belt conveyor is located; the feeding speed control module is used for adjusting the feeding speed of the feeder according to the current threshold interval of the motor; the self-adaptive control over the feeding speed can be achieved, so that the discharging weight difference of gravels generated by ore washing is reduced, the situation that the design load of a belt conveyor is low or high can be avoided, efficient utilization of equipment is facilitated, and meanwhile the risk that a belt of the belt conveyor is torn can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of laterite nickel ore washing, and in particular to a uniform discharging control system and method for a laterite nickel ore washing line. Background Art

[0002] At present, there are two main types of ore resources that can be used to extract nickel metal: nickel sulfide ore and laterite nickel ore, of which nickel sulfide ore resources account for about 28% of nickel resources, and laterite nickel ore accounts for about 55% of nickel resources. Nickel sulfide has good hydrophobic properties. The flotation method can effectively enrich nickel sulfide, thereby reducing the cost of smelting. Nickel sulfide ore resources provide about 59% of nickel and nickel chemicals in the world, and are currently the main way for people to obtain nickel. Unfortunately, with the continuous decline in the reserves of large-scale nickel sulfide mines, the mining depth is increasing, and the difficulty and cost of mining are constantly increasing. Today, when nickel sulfide ore resources are facing the crisis of depletion, people have to turn their attention to laterite nickel ore with rich reserves of nickel resources. Laterite nickel ore is a loose clay-like aggregate of nickel, iron, magnesium, cobalt, silicon, aluminum and other element oxides formed by long-term geological action on nickel-bearing olivine bedrock. The iron element contained in it is in a +3 valence state due to severe oxidation, resulting in its overall appearance being reddish brown, so it is named laterite nickel ore.

[0003] The prior art provides an automated ore washing line, which includes: a drum ore washer, a trough ore washer, a linear vibrating screen, a slurry storage mechanism, a hydrocyclone and a control mechanism. The drum ore washer has an ore inlet, a first ore outlet for discharging larger-sized ore, and a second ore outlet for discharging smaller-sized ore; the trough ore washer has a washing material inlet, a first washing material outlet for discharging larger-sized washing material, and a second washing material outlet for discharging smaller-sized washing material, and the washing material inlet is connected to the second ore outlet; the linear vibrating screen has a screening material inlet, a first screening material outlet for discharging larger-sized screening material, and a second screening material outlet for discharging smaller-sized screening material, and the screening material inlet is connected to the first screening material outlet; the gravel produced by ore washing is generally discharged onto a belt conveyor and transported to the site by the belt conveyor.

[0004] However, in actual applications, due to the large differences in gravel content in laterite nickel ores of different categories or origins, the gravel output produced by the drum ore washer or the double-helix scrubber is quite different. If the design load of the belt conveyor is high, this will cause the belt conveyor to be frequently underloaded, which is not conducive to the efficient use of the equipment. If the design load of the belt conveyor is low, it will occasionally be overloaded, which increases the risk of belt tearing. Summary of the invention

[0005] The object of the present invention is to provide a uniform discharging control system and method for a laterite nickel ore washing line, so as to solve the technical problem that the design load of the belt conveyor cannot be controlled in the prior art, and a high design load of the belt conveyor will often lead to insufficient load of the belt conveyor, which is not conducive to the efficient utilization of the equipment. When the design load of the belt conveyor is low, overload operation may occur occasionally, which increases the risk of belt tearing of the belt conveyor.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The uniform discharging control system of laterite nickel ore washing line includes:

[0008] A current signal acquisition module, the current signal acquisition module is used to connect to the motor of the belt conveyor to obtain the motor current value of the belt conveyor;

[0009] A judging module, the judging module is used to judge the threshold interval of the motor current value;

[0010] A feeding speed control module, the feeding speed control module is used to adjust the feeding speed of the feeder corresponding to the belt conveyor according to the threshold interval where the motor current value is located.

[0011] In some embodiments, the laterite nickel ore washing line of the uniform discharging control system of the laterite nickel ore washing line comprises multiple feeders, multiple drum washers, a first belt conveyor, multiple double-helix scrubbers, multiple linear vibrating screens and a second belt conveyor, the feeders, drum washers and double-helix scrubbers are arranged one by one, the discharge end of the feeder is connected to the feed end of the drum washers, the first discharge port of the drum washers corresponds to the feed end of the first belt conveyor, and its second discharge port is connected to the feed end of the double-helix scrubber, one discharge port of the double-helix scrubber is connected to the linear vibrating screen, one discharge port of the linear vibrating screen corresponds to the feed end of the second belt conveyor, the first belt conveyor and the second belt conveyor both correspond to the feeding speed control module, and the first belt conveyor and the second belt conveyor both correspond to the current signal acquisition module.

[0012] A uniform discharging control method for a laterite nickel ore washing line is also provided, which is used for the uniform discharging control system of the laterite nickel ore washing line, and comprises the following steps:

[0013] S1: Get the motor current value of the belt conveyor;

[0014] S2: Determine the threshold interval of the motor current value;

[0015] S3: According to the corresponding relationship between the threshold interval and the feeding speed, adjusting the feeding speed of the feeder corresponding to the belt conveyor.

[0016] In some embodiments, the corresponding relationship includes:

[0017] The threshold interval is set to several levels. When the motor current value is in the threshold interval at several levels, the feeding speed of the feeder is reduced by several control methods respectively, and the number of the feeders controlled in the several control methods is different.

[0018] In some embodiments, in several levels of the threshold intervals, as the values ​​of the multiple threshold intervals increase, the number of the feeders controlled to reduce the feeding speed in the corresponding control method increases successively.

[0019] In some embodiments, a control trigger time is also set. When the motor current value is in one of the threshold intervals and continues to be in the threshold interval after exceeding the set control trigger time, the feeding speed of the feeder is reduced by adjusting the threshold interval accordingly, otherwise no operation is performed.

[0020] In some embodiments, the feeding speed of each of the feeders is respectively set to a primary feeding speed, a secondary feeding speed and a tertiary feeding speed, and the speeds of the primary feeding speed, the secondary feeding speed and the tertiary feeding speed decrease sequentially.

[0021] In some embodiments, the threshold interval is set to n levels. When the motor current value corresponds to reducing the feeding speed of the feeder through n kinds of control methods, the values ​​of the first-level threshold interval to the n-th-level threshold interval increase successively, and the number of the feeders controlled by the first control method to the n-th control method to reduce the feeding speed increases successively.

[0022] In some embodiments, the feeder adopts the first-level feeding speed for feeding by default, and when the motor current value is within the threshold interval of the first k levels, the feeding speed of the feeder is reduced to the second-level feeding speed;

[0023] When the motor current value is in the threshold interval of the latter nk levels, the feeding speed of the feeder is reduced to the third-level feeding speed, 1≤k<n.

[0024] In some embodiments, two groups of current signal acquisition modules are provided, and the two groups of current signal acquisition modules are respectively connected to two belt conveyors of the laterite nickel ore washing line. When the motor current value of the motor of any one of the belt conveyors is in any one of the threshold intervals, the feeding speed of the feeder is reduced through the threshold interval.

[0025] Beneficial effects of the present invention:

[0026] The motor current value of the belt conveyor is obtained through the current signal acquisition module, and the judgment module can judge the threshold interval of the motor current value of the belt conveyor based on the motor current value measured by the current signal acquisition module, so as to control and reduce the feeding speed of the corresponding set number of feeders according to the threshold interval in which it is located through the feeding speed control module. When the load of the belt conveyor increases, the system can be used to control the set number of feeders to reduce the feeding speed, so as to reduce the overall feeding speed of the ore washing line, and realize adaptive control of the feeding speed, so as to reduce the difference in the discharge weight of gravel produced by ore washing, thereby avoiding the situation where the design load of the belt conveyor is lower or higher, which is conducive to the efficient use of equipment and can reduce the risk of belt tearing of the belt conveyor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a uniform discharging control system of a laterite nickel ore washing line in the present invention;

[0028] Figure 2 It is a structural schematic diagram of a laterite nickel ore washing line of a uniform discharging control system of the laterite nickel ore washing line of the present invention;

[0029] Figure 3 The present invention is a flow chart of a uniform discharging control method for a laterite nickel ore washing line.

[0030] In the figure:

[0031] 1. Feeder; 2. Drum ore washer; 3. First belt conveyor; 4. Double spiral scrubber; 5. Linear vibrating screen; 6. Second belt conveyor. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0036] The present application provides a uniform discharging control system and method for a laterite nickel ore washing line, which can realize adaptive control of the feeding speed, thereby avoiding the situation where the design load of the belt conveyor is too low or too high, which is conducive to the efficient use of the equipment and can reduce the risk of belt tearing of the belt conveyor.

[0037] It should be noted that the uniform discharging control system and method of the laterite nickel ore washing line of the present application are used for but not limited to laterite nickel ore washing lines, etc. For the convenience of explanation, in the present application, only the uniform discharging control system and method of the laterite nickel ore washing line are applied to the laterite nickel ore washing line as an example for explanation, and the principle of applying the uniform discharging control system and method of the laterite nickel ore washing line to other types of equipment is essentially the same as the principle applied to the laterite nickel ore washing line, which will not be repeated here.

[0038] like Figure 1 As shown, the uniform discharging control system of the laterite nickel ore washing line includes a current signal acquisition module, a judgment module and a feeding speed control module. The current signal acquisition module is used to connect the motor of the belt conveyor to obtain the motor current value of the belt conveyor; the judgment module is used to judge the threshold interval of the motor current value; the feeding speed control module is used to adjust the feeding speed of the feeder 1 currently corresponding to the belt conveyor according to the corresponding relationship between the motor current threshold interval and the feeding speed.

[0039] Due to the large difference in gravel content in laterite nickel ores of different categories or origins, the gravel discharge produced by ore washing is quite different, which leads to a large difference in the load of the belt conveyor. Therefore, in the present application, the motor current value of the belt conveyor can be obtained through the current signal acquisition module. If the motor current value increases, it means that the load of the belt conveyor increases. At this time, the feeding speed can be adaptively reduced. If the motor current value decreases, it means that the load of the belt conveyor decreases. At this time, the feeding speed can be adaptively increased. The judgment module is set with a multi-level threshold interval for the current value. It can judge the threshold interval of the motor current value based on the motor current value measured by the current signal acquisition module, so that the feeding speed control module can control and adjust the feeding speed of the corresponding set number of feeders 1 according to the threshold interval in which it is located, so that when the load of the belt conveyor increases, the system can be used to control the set number of feeders 1 to reduce the feeding speed, so as to reduce the overall feeding speed of the ore washing line and realize adaptive control of the feeding speed.

[0040] like Figure 2 As shown, in some embodiments, the laterite nickel ore washing line of the uniform discharging control system of the laterite nickel ore washing line includes multiple feeders 1, multiple drum ore washers 2, a first belt conveyor 3, multiple double-helix scrubbers 4, multiple linear vibrating screens 5 and a second belt conveyor 6. The feeders 1, the drum ore washers 2 and the double-helix scrubbers 4 are arranged one by one. The feed end of the feeder 1 is connected to the feeding channel, and the feeding channel is used for the dump truck to pour the ore, and the ore is sent to the feeder 1 through the feeding channel. The discharge end of the feeder 1 is connected to the feed end of the drum ore washer 2, and the first discharge port of the drum ore washer 2 Corresponding to the feeding end of the first belt conveyor 3, it is used to discharge large gravels to the first belt conveyor 3. The second discharge port of the drum ore washer 2 is connected to the feeding end of the double spiral scrubber 4, which is used to discharge slurry to the double spiral scrubber 4. One discharge port of the double spiral scrubber 4 is connected to the linear vibrating screen 5, which is used to discharge small gravels to the linear vibrating screen 5. One discharge port of the linear vibrating screen 5 corresponds to the feeding end of the second belt conveyor 6, which is used to discharge small gravels to the second belt conveyor 6 after screening out water. The other discharge port of the double spiral scrubber 4 discharges the slurry and the water screened out by the linear vibrating screen 5, and transports it to the next process. Therefore, there are two belt conveyors on the laterite nickel ore washing line. The current signal acquisition module can be set in two groups, corresponding to the motors connected to the two belt conveyors, so as to measure the motor current values ​​of the two belt conveyors respectively, and the corresponding set number of feeders 1 are controlled by the motor current values ​​of the two belt conveyors to reduce the feeding speed, which is conducive to realizing the efficient use of the belt conveyors.

[0041] There are actually two belt conveyors on the laterite nickel ore washing line. Two groups of current signal acquisition modules are provided to respectively connect the two belt conveyors of the laterite nickel ore washing line to respectively monitor the current values ​​of the first motor in the first belt conveyor 3 and the second motor in the second belt conveyor 6. The current of the first motor has a first-level threshold interval, a second-level threshold interval, etc., and the current of the second motor has a 1'-level threshold interval, a 2'-level threshold interval, etc. In this actual application scenario, as long as one condition is met in "the first motor current is in the first threshold interval" and "the second motor current is in the 1'threshold interval", it is necessary to control the feeding speed adjustment of the feeder 1.

[0042] It should be noted that when the current value of the first motor and the current value of the second motor are not in the same level threshold interval, the higher level threshold interval shall prevail. For example, when the current value of the first motor is in the level 1 threshold interval and the current value of the second motor is in the level 2' threshold interval, the second control mode is executed. In the current embodiment, the feeder 1 is a plate feeder. It should also be noted that in other possible embodiments, the belt conveyor can also be provided with one or three belts, etc., which is not limited here.

[0043] The present application obtains the motor current value of the belt conveyor through the current signal acquisition module, and the judgment module can judge the threshold interval of the motor current value of the belt conveyor based on the motor current value measured by the current signal acquisition module, so as to control and reduce the feeding speed of the corresponding set number of feeders 1 according to the threshold interval in which it is located through the feeding speed control module, so that when the load of the belt conveyor increases, the system can be used to control the set number of feeders 1 to reduce the feeding speed, so as to reduce the overall feeding speed of the ore washing line, and realize adaptive control of the feeding speed, so as to reduce the difference in the discharge weight of gravel produced by ore washing, thereby avoiding the situation where the design load of the belt conveyor is lower or higher, which is conducive to the efficient use of equipment and can reduce the risk of belt tearing of the belt conveyor.

[0044] like Figure 3 As shown, the embodiment of the present application also provides a uniform discharging control method for a laterite nickel ore washing line, which is applied to a uniform discharging control system for a laterite nickel ore washing line including any one of the above embodiments, and the method comprises:

[0045] S1: Get the motor current value of the belt conveyor;

[0046] S2: Determine the threshold range of the motor current value of the belt conveyor;

[0047] S3: According to the corresponding relationship between the motor current threshold interval and the feeding speed, the feeding speed of the corresponding set number of feeders 1 is controlled according to the threshold interval.

[0048] Among them, the above-mentioned corresponding relationship includes: setting the threshold interval to several levels, when the motor current value is in several levels of threshold intervals, the feeding speed of the feeder 1 is reduced by several control methods respectively, and the number of feeders 1 controlled in the several control methods is different; in several levels of threshold intervals, as the values ​​of multiple threshold intervals increase, the number of feeders 1 controlled to reduce the feeding speed in the corresponding control method increases successively.

[0049] Specifically, when the motor current of the belt conveyor is in the first threshold interval, the feeding speed is reduced by the first control method; when the motor current of the belt conveyor is in the second threshold interval, the feeding speed is reduced by the second control method; and so on, to achieve the control of the feeding speed of several feeders 1. Moreover, in the above corresponding relationship, the value of the second threshold interval is greater than the value of the first threshold interval, and the number of feeders 1 controlled by the second control method is greater than the number of feeders 1 controlled by the first control method.

[0050] In some embodiments, the feeders 1 may be divided into multiple groups, each group of feeders 1 may include one feeder 1 or multiple feeders 1. When the motor current of the belt conveyor is in the first threshold interval, the feeding speed of one group of feeders 1 may be reduced; when the motor current of the belt conveyor is in the second threshold interval, the feeding speed of two groups of feeders 1 may be reduced; when the motor current of the belt conveyor is in the third threshold interval, the feeding speed of three groups of feeders 1 may be reduced; and so on.

[0051] For example, in one embodiment, ten ore washers may be provided, and the ten ore washers may be arranged into five groups, and the feeds of the five groups of ore washers correspond to the five groups of feeders 1 respectively.

[0052] When the motor current value of the belt conveyor is in the first level threshold interval, the feeding speed is reduced by the first control method, specifically controlling the first group of feeders 1 to reduce the feeding speed;

[0053] When the motor current value of the belt conveyor is in the second level threshold interval, the feeding speed is reduced by the second control method, specifically controlling the first group and the second group of feeders 1 to reduce the feeding speed;

[0054] When the motor current value of the belt conveyor is in the third level threshold interval, the feeding speed is reduced by the third control method, specifically controlling the first to third groups of feeders 1 to reduce the feeding speed;

[0055] When the motor current value of the belt conveyor is in the fourth threshold interval, the feeding speed is reduced by the fourth control method, specifically controlling the first to fourth groups of feeders 1 to reduce the feeding speed;

[0056] When the motor current value of the belt conveyor is in the fifth level threshold interval, the feeding speed is reduced through the fifth control method, specifically controlling the first to fifth groups of feeders 1 to reduce the feeding speed.

[0057] In order to ensure the control accuracy, this embodiment adopts the hysteresis adjustment method. Therefore, in some embodiments, the feed speed control module can set a control trigger time. When the motor current value of the belt conveyor is in any threshold interval and continues to exceed the set control trigger time, if the motor current value is still in the threshold interval, the control method corresponding to the threshold interval is controlled to start, otherwise no operation is performed. Exemplarily, the control trigger time is 5s-10s.

[0058] Specifically, when the motor current value of the belt conveyor is in the first-level threshold interval, after the set control trigger time, the motor current value of the belt conveyor is still greater than the minimum value of the threshold interval and still remains within the first-level threshold interval, then the first control mode is executed; if it is less than the minimum value of the first-level threshold interval after the set control trigger time, the feeder 1 does not reduce the speed. Of course, when the motor current value of the belt conveyor is in the first-level threshold interval, and within the set control trigger time, the motor current value is not in the first-level threshold interval, but in the second-level threshold interval or other level threshold intervals, it will trigger the reset system, and the control trigger time will be recalculated at this time. If the motor current value is still in the threshold interval after the time reset after the set control trigger time, the control mode corresponding to the threshold interval will be executed.

[0059] In order to improve the control accuracy, in some more preferred embodiments, the feeding speed of the feeder 1 is set to a first-level feeding speed, a second-level feeding speed and a third-level feeding speed, respectively, and the speeds of the first-level feeding speed, the second-level feeding speed and the third-level feeding speed are reduced successively, and the feeder 1 uses the first-level feeding speed for feeding by default; in the current embodiment, it is assumed that there are n levels of threshold intervals, if the subsequent motor current value increases to between the first-level threshold interval and the kth level (1≤k<n), the feeder 1 in the corresponding control mode adopts the second-level feeding speed; the motor current value increases to between nk and n levels, and the feeder 1 in the corresponding control mode adopts the third-level feeding speed, so that in the operation of the laterite nickel ore washing line, the motor current value of the belt conveyor is not in any threshold interval.

[0060] Exemplarily, in some embodiments, the laterite nickel ore washing line has ten groups of feeders 1, and correspondingly, the threshold interval is set with ten levels. When the motor current value is in the ten threshold intervals, the feeding speed of the feeder 1 is reduced by the ten above-mentioned control methods respectively. The values ​​of the first threshold interval to the tenth threshold interval increase successively, and the number of feeders 1 controlled by the first control method to the tenth control method to reduce the feeding speed increases successively.

[0061] When the motor current value is in the threshold interval of the first five levels, the feeding speed of the feeder 1 is the second-level feeding speed; when the motor current value is in the threshold interval of the last five levels, the feeding speed of the feeder 1 is the third-level feeding speed.

[0062] That is to say, in this embodiment, when the motor current value of the feeder 1 is below the first-level threshold interval, the feeder 1 adopts the first-level feeding speed for feeding by default; when the motor current value is in one of the threshold intervals from the first-level threshold interval to the fifth-level threshold interval for the first time, the part of the feeder 1 controlled by the corresponding control method adopts the second-level feeding speed; when the motor current value is in one of the threshold intervals from the sixth-level threshold interval to the tenth-level threshold interval for the first time, the part of the feeder 1 controlled by the corresponding control method adopts the third-level feeding speed.

[0063] Therefore, the motor current value of the belt conveyor can be obtained through the current signal acquisition module, and the judgment module can judge the threshold interval of the motor current value of the belt conveyor based on the motor current value measured by the current signal acquisition module, so as to control and reduce the feeding speed of the corresponding set number of feeders 1 according to the threshold interval in which it is located through the feeding speed control module. When the load of the belt conveyor increases, the system can be used to control the set number of feeders 1 to reduce the feeding speed, so as to reduce the overall feeding speed of the ore washing line, and realize adaptive control of the feeding speed, so as to reduce the difference in the discharge weight of gravel produced by ore washing, thereby avoiding the situation where the design load of the belt conveyor is lower or higher, which is conducive to the efficient utilization of the equipment and can reduce the risk of belt tearing of the belt conveyor.

[0064] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. The uniform discharging control system of the laterite nickel ore washing line is characterized by: include: A current signal acquisition module, the current signal acquisition module is used to connect to the motor of the belt conveyor to obtain the motor current value of the belt conveyor; A judging module, the judging module is used to judge the threshold interval of the motor current value; A feeding speed control module, the feeding speed control module is used to adjust the feeding speed of the feeder (1) corresponding to the belt conveyor according to the threshold interval where the motor current value is located.

2. The uniform discharging control system of the laterite nickel ore washing line according to claim 1 is characterized in that: The laterite nickel ore washing line of the uniform discharge control system of the laterite nickel ore washing line comprises a plurality of feeders (1), a plurality of drum washers (2), a first belt conveyor (3), a plurality of double-helix scrubbers (4), a linear vibrating screen (5) and a second belt conveyor (6), wherein the feeders (1), the drum washers (2) and the double-helix scrubbers (4) are arranged one by one, the discharge end of the feeder (1) is connected to the feed end of the drum washers (2), the first discharge port of the drum washers (2) is connected to the first discharge port of the drum washers (2), and the second discharge port of the drum washers (2) is connected to the first discharge port of the drum washers (4). The first belt conveyor (3) corresponds to the feeding end of the first belt conveyor (3), and its second discharge port is connected to the feeding end of the double-helix scrubbing machine (4). One discharge port of the double-helix scrubbing machine (4) is connected to the linear vibrating screen (5). One discharge port of the linear vibrating screen (5) corresponds to the feeding end of the second belt conveyor (6). The first belt conveyor (3) and the second belt conveyor (6) both correspond to the feeding speed control module, and the first belt conveyor (3) and the second belt conveyor (6) both correspond to the current signal acquisition module.

3. A uniform discharging control method for a laterite nickel ore washing line, used for a uniform discharging control system for a laterite nickel ore washing line as claimed in claim 1 or 2, characterized in that: The steps include: S1: Get the motor current value of the belt conveyor; S2: Determine the threshold interval of the motor current value; S3: According to the corresponding relationship between the threshold interval and the feeding speed, the feeding speed of the feeder (1) corresponding to the belt conveyor is adjusted.

4. The uniform discharging control method of the laterite nickel ore washing line according to claim 3 is characterized in that: The corresponding relationship includes: The threshold interval is set to several levels. When the motor current value is in the threshold interval at several levels, the feeding speed of the feeder (1) is reduced through several corresponding control methods, and the number of the feeders (1) controlled in the several control methods is different.

5. The uniform discharging control method of the laterite nickel ore washing line according to claim 4 is characterized in that: In the threshold intervals of several levels, as the values ​​of the threshold intervals increase, the number of the feeders (1) controlled to reduce the feeding speed in the corresponding control mode increases successively.

6. The uniform discharging control method of the laterite nickel ore washing line according to claim 3 is characterized in that: A control trigger time is also set. When the motor current value is in one of the threshold intervals and continues to be in the threshold interval after exceeding the set control trigger time, the feeding speed of the feeder (1) is adjusted to be reduced corresponding to the threshold interval, otherwise no operation is performed.

7. The uniform discharging control method of the laterite nickel ore washing line according to claim 5, characterized in that: The feeding speed of each feeder (1) is respectively set to a primary feeding speed, a secondary feeding speed and a tertiary feeding speed, and the speeds of the primary feeding speed, the secondary feeding speed and the tertiary feeding speed decrease in sequence.

8. The uniform discharging control method of the laterite nickel ore washing line according to claim 7, characterized in that: The threshold interval is set to n levels, and when the motor current value corresponds to reducing the feeding speed of the feeder (1) through n control methods, The values ​​of the first level threshold interval to the nth level threshold interval increase successively, and the number of the feeders (1) controlled by the first control mode to the nth control mode to reduce the feeding speed increases successively by one.

9. The uniform discharging control method of the laterite nickel ore washing line according to claim 8, characterized in that: The feeder (1) uses the first-level feeding speed for feeding by default, and when the motor current value is within the threshold range of the first k levels, the feeding speed of the feeder (1) is reduced to the second-level feeding speed; When the motor current value is in the threshold interval of the latter nk levels, the feeding speed of the feeder (1) is reduced to the third-level feeding speed, 1≤k<n.

10. The uniform discharging control method of the laterite nickel ore washing line according to claim 3, characterized in that: Two groups of current signal acquisition modules are provided, and the two groups of current signal acquisition modules are respectively connected to two belt conveyors of a laterite nickel ore washing line. When the motor current value of the motor of any one of the belt conveyors is within any one of the threshold intervals, the feeding speed of the feeder (1) is reduced through the threshold interval.

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