CN115121365B

CN115121365B - Intelligent molybdenum ore sorting and pre-throwing process

Info

Publication number: CN115121365B
Application number: CN202210773498.XA
Authority: CN
Inventors: 李东锋; 刘斌; 李鹏飞
Original assignee: Abaga Banner Golden Land Mining Co ltd
Current assignee: Abaga Banner Golden Land Mining Co ltd
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2023-04-04
Anticipated expiration: 2042-07-01
Also published as: CN115121365A

Abstract

The invention relates to the technical field of molybdenum ore dressing, in particular to an intelligent molybdenum ore sorting and pre-throwing process, which comprises the following steps: step S1, performing primary crushing on the obtained raw ore, and adjusting the rotating speed of a crusher to a corresponding value by a central control module according to the difference value between the actual average size of the ore and a preset average size; s2, the central control module controls an intelligent sorting machine to intelligently sort the crushed ores so as to sort out concentrate and tailings; s3, the central control module judges whether to start the spray valve according to the comparison result of the horizontal distance between the first bin and the output point of the conveyor belt and the horizontal distance between the second bin and the output point of the conveyor belt; and S4, the central control module controls the ore grinding device to grind the concentrate, controls the flotation device to perform flotation on the concentrate after the ore grinding is completed, and filters the concentrate subjected to flotation to complete separation. The method and the device realize the improvement of the accuracy and the effectiveness of molybdenum ore separation and the improvement of the resource utilization rate of the molybdenum ore.

Description

Intelligent molybdenum ore sorting and pre-throwing process

Technical Field

The invention relates to the technical field of molybdenum ore dressing, in particular to an intelligent molybdenum ore sorting and pre-throwing process.

Background

The traditional molybdenum ore dressing process comprises the following steps: grinding the crushed ore, performing flotation, filtering the concentrate obtained by flotation, and discharging the tailings obtained by flotation into a tailing pond. The process has the defect that a large part of crushed ores are barren rocks containing no molybdenum or low molybdenum and enter the next procedure, so that the ore dressing cost is greatly increased.

Chinese patent publication No.: CN113976306A discloses a complex refractory low-grade molybdenum ore dense-medium mineral pre-throwing waste system and waste throwing process, which is characterized by comprising a ball mill, a mixing barrel, a dense-medium cyclone, a magnetic separator, a concentration cyclone, a grading cyclone, a magnetic separator and a dewatering screen, wherein raw ore is fed into the ball mill for crushing, the crushed ore is uniformly mixed with a dense medium in the mixing barrel and then fed into the dense-medium cyclone for separation, the separated concentrate and tailings are respectively fed into the magnetic separator for medium removal operation, the concentrate tailings after magnetic separation are respectively fed into the concentration cyclone for dewatering and concentration, the concentrate after concentration is fed into the grading cyclone, the underflow of the grading cyclone returns to the ball mill for regrinding, the overflow of the grading cyclone is fed into subsequent separation operation, the dewatered tailings are final tailings products, and can be used as gravel aggregates for resource utilization, and the system has the advantages of simple system, high separation index, high effective treatment amount, water consumption reduction, running cost reduction and the like. Therefore, the complex refractory low-grade molybdenum ore heavy-medium beneficiation pre-waste-throwing system and the waste-throwing process have the problems of insufficient accuracy and effectiveness of molybdenum ore beneficiation and low resource utilization rate of molybdenum ore.

Disclosure of Invention

Therefore, the invention provides an intelligent molybdenum ore sorting and pre-throwing process which is used for overcoming the defects of accuracy and effectiveness of molybdenum ore sorting and the problem of low resource utilization rate of molybdenum ore in the prior art.

In order to achieve the purpose, the invention provides an intelligent molybdenum ore sorting and pre-throwing process, which comprises the following steps: the method comprises the following steps that S1, the obtained raw ore is subjected to primary crushing, a central control module judges whether secondary crushing is performed on the ore subjected to primary crushing or not according to the average size of the ore subjected to primary crushing detected by a size detector, and when the secondary crushing is judged to be required, the rotating speed of a crusher is adjusted to a corresponding value according to the difference value between the actual average size of the ore and a preset average size; s2, the central control module controls the intelligent sorting machine to intelligently sort the crushed ores so as to sort out concentrate and tailings, and whether the moving speed of the conveyor belt is adjusted to a corresponding value is judged according to the difference value between the size of the actual crushed ores and the size of preset ores; s3, when the moving speed of the conveyor belt is adjusted, the central control module adjusts the moving time of the first bin moving device to a corresponding value according to the difference value between the average size of the ore concentrate and the average size of the preset ore concentrate, and adjusts the moving time of the second bin moving device to a corresponding value according to the difference value between the actual average size of the tailings and the average size of the preset tailings, and when the moving time of the first bin moving device and the moving time of the second bin moving device are adjusted, the central control module judges whether the spray valve is started or not according to the comparison result of the horizontal distance between the first bin and the conveyor belt output point and the horizontal distance between the second bin and the conveyor belt output point; and S4, the central control module controls the ore grinding device to grind the concentrate subjected to intelligent separation, controls the flotation device to perform flotation on the concentrate subjected to ore grinding after the ore grinding is finished, and filters the concentrate subjected to flotation to finish separation.

Further, in the step S1, when the crusher completes primary crushing of the raw ore, the central control module determines whether to perform secondary crushing on the primarily crushed ore according to the average size D of the ore measured by the size detector, the central control module is provided with a preset first average size D1 and a preset second average size D2, wherein D1 is less than D2,

if D is less than or equal to D1, the central control module judges that the actual average size of the primarily crushed ore is within an allowable range and does not perform secondary crushing on the primarily crushed ore;

if D1 is larger than D and is not larger than D2, the central control module judges that the actual average size of the primarily crushed ore exceeds an allowable range and controls the crusher to use the initial rotating speed to re-crush the primarily crushed ore;

and if D is larger than D2, the central control module judges that the actual average size of the primarily crushed ore exceeds an allowable range, calculates the difference value delta D between the actual average size and the preset average size, adjusts the rotating speed of the crusher to a corresponding value according to the delta D, and sets delta D = D-D1.

Further, when the central control module finishes the judgment of whether ore is secondarily crushed and D is larger than D2, the central control module adjusts the rotating speed of the crusher according to the difference value delta D between the actual average size of the ore and the preset average size, the central control module is provided with a preset first average size difference value delta D1, a preset second average size difference value delta D2, a preset first crusher rotating speed adjusting coefficient alpha 1, a preset second crusher rotating speed adjusting coefficient alpha 2 and a preset crusher rotating speed V0, wherein delta D1 is less than delta D2,1 is more than alpha 1 and less than alpha 2,

if the delta D is less than or equal to the delta D1, the central control module judges that the difference value between the actual average size of the ores and the preset average size is within an allowable range and does not adjust the rotating speed of the crusher;

if delta D1 is less than delta D and less than or equal to delta D2, the central control module judges that the difference value between the average size of the ore and the preset average size exceeds an allowable range, alpha 1 is used for adjusting the rotating speed of the crusher, the adjusted rotating speed of the crusher is marked as V1, and V1= alpha 1 xV 0 is set;

if delta D is larger than delta D2, the central control module judges that the difference value between the average size of the ore and the preset average size exceeds an allowable range, alpha 2 is used for adjusting the rotating speed of the crusher, the adjusted rotating speed of the crusher is marked as V2, and V2= alpha 2 xV 0 is set.

Further, in step S2, when the central control module completes the adjustment of the rotation speed of the crusher, the central control module preliminarily determines whether to adjust the moving speed of the conveyor belt according to the minimum size Dmin of the crushed ore detected by the size detector, the central control module is provided with a preset ore size D0,

if Dmin is less than D0, the central control module judges that the minimum size of the crushed ore is in an allowable range and does not adjust the moving speed of the conveyor belt;

if Dmin is larger than or equal to D0, the central control module judges that the minimum size of the crushed ore exceeds an allowable range, calculates the difference value delta Dm between the actual crushed ore size and the preset ore size, adjusts the moving speed of the conveyor belt to a corresponding value, and sets delta Dm = Dmin-D0.

When the central control module finishes the primary judgment of whether the moving speed of the conveyor belt is adjusted, the central control module adjusts the moving speed of the conveyor belt according to the difference value delta Dm between the size of the ore which is actually crushed and the size of the preset ore, the central control module is provided with a preset first ore size difference value delta Dm1, a preset second ore size difference value delta Dm2, a preset first conveyor belt moving speed adjusting coefficient beta 1, a preset second conveyor belt moving speed adjusting coefficient beta 2 and a preset conveyor belt moving speed U0, wherein, dm1 is less than delta 2, beta 1 is more than 0 and beta 2 is less than 1,

if the delta Dm is less than or equal to the delta Dm1, the central control module judges that the difference value between the size of the actually crushed stone and the size of the preset ore is in an allowable range and does not adjust the moving speed of the conveyor belt;

if the difference value between the size of the ore which is actually crushed and the size of the preset ore exceeds an allowable range, the central control module judges that the difference value between the size of the ore which is actually crushed and the size of the preset ore exceeds the allowable range, the moving speed U0 of the conveyor belt is adjusted by beta 2, the adjusted moving speed of the conveyor belt is recorded as U1, and U1= beta 2 × U0 is set;

if delta Dm is > [ delta Dm2 ], the central control module judges that the difference value between the size of the ore which is actually crushed and the size of the preset ore exceeds an allowable range, the moving speed U0 of the conveyor belt is adjusted by using beta 1, the moving speed of the conveyor belt after adjustment is marked as U2, and U2= beta 1 × U0 is set.

Further, in the step S2, when the central control module completes the adjustment of the moving speed of the conveyor belt, the central control module calculates an average size L of the batch of the concentrate according to the ore size of the concentrate detected by the size detector disposed in the first bin and performs a preliminary determination on whether to adjust the moving time of the moving device of the first bin according to L, the central control module is provided with a preset first average size L1 of the concentrate ore and a preset second average size L2 of the concentrate ore, wherein L1 is less than L2,

if L is less than or equal to L1, the central control module judges that the average size of the concentrate ore is lower than an allowable range, calculates the difference value delta Lm between the average size of the concentrate ore and the preset size of the concentrate ore, judges whether a third storage bin is started or not according to the difference value delta Lm, and sets delta Lm = L1-L;

if L1 is larger than L and smaller than or equal to L2, the central control module judges that the average size of the concentrate ore is within an allowable range and controls a spray valve to send the concentrate ore into a first storage bin;

if L is larger than L2, the central control module judges that the average size of the concentrate ore exceeds an allowable range, calculates the difference Delta L between the average size of the concentrate ore and the preset size of the concentrate ore, adjusts the moving time length of the first bin moving device in the direction away from the discharge hole of the conveying belt to a corresponding value according to the Delta L, and sets Delta L = L-L2.

Further, when the central control module completes the preliminary determination of whether to adjust the moving time length of the first bin moving device and L is larger than L2, the central control module adjusts the moving time length of the first bin moving device according to the difference Delta L between the average size of the concentrate ore and the preset average size of the concentrate ore so as to adjust the position of the first bin, the central control module is provided with a preset first concentrate average size difference Delta L1, a preset second concentrate average size difference Delta L2, a preset first moving time length adjusting coefficient gamma 1, a preset second moving time length adjusting coefficient gamma 2 and a preset bin moving device moving time length T0, wherein Delta L1 is less than Delta L2, and gamma 1 is less than gamma 1 and less than gamma 2,

if the delta L is less than or equal to the delta L1, the central control module judges that the difference value between the average size of the actual concentrate ore and the average size of the preset concentrate ore is in an allowable range and does not adjust the moving time length of the first storage bin moving device;

if delta L1 is smaller than delta L and smaller than or equal to delta L2, the central control module judges that the difference value between the average size of actual concentrate ores and the average size of preset concentrate ores exceeds an allowable range, and adjusts the moving time length of the first bin moving device by using gamma 1, the adjusted moving time length of the first bin moving device is recorded as T1, and T1= gamma 1 xT 0 is set;

if DeltaL >. DELTA.L 2, the central control module judges that the difference value between the average size of the actual concentrate ore and the average size of the preset concentrate ore exceeds an allowable range, and adjusts the moving time length of the first bin moving device by using gamma 2, the adjusted moving time length of the first bin moving device is marked as T2, and T2= gamma 2 xT 0 is set.

Further, when the central control module completes the preliminary judgment of whether the moving time of the first storage bin moving device is adjusted and L is less than or equal to L1, the central control module calculates the average size L of the ore concentrate according to the ore concentrate size detected by the size detector and judges whether a third storage bin is started according to the difference value DeltaLm between L and the preset first ore concentrate size, deltaLm = L1-L, the central control module is provided with the preset minimum ore concentrate size difference value DeltaLm 0,

if the delta Lm is less than or equal to the delta Lm0, the central control module judges that the difference value between the average size of the ore concentrate and the preset size of the first ore concentrate is in an allowable range, and does not start the third storage bin;

if delta Lm is larger than delta Lm0, the central control module judges that the difference value between the average size of the concentrate ore and the preset first concentrate ore size exceeds the allowable range, starts the third storage bin and moves the position of the third storage bin to the position of the first storage bin.

After the third storage bin is started, the central control module judges the specific operation condition of the spray valve according to the horizontal distance between the second storage bin and the output point of the conveyor belt and the horizontal distance between the first storage bin and the output point of the conveyor belt,

when Eb is less than Wb, the central control module judges to open a second spray valve arranged above the initial position of a second storage bin

And when Eb is larger than or equal to Wb, the central control module judges that a second spray valve arranged above the initial position of the second storage bin is not opened.

Further, when the central control module finishes adjusting the moving time length of the first bin moving device, the central control module calculates the actual average size La of the tailings according to the ore size of the tailings detected by the size detector and performs primary judgment on whether the moving time length of the second bin moving device is adjusted according to La, the central control module is provided with a preset first tailing average size La1 and a preset second tailing average size La2, wherein La1 is less than La2,

if La is less than or equal to La1, the central control module judges that the actual average size of the tailings is within an allowable range and controls the intelligent sorting equipment to directly output the sorted tailings to a second storage bin;

if La1 is larger than La and smaller than or equal to La2, the central control module judges that the actual average size of the tailings is within an allowable range and controls the intelligent sorting equipment to directly output the sorted tailings to a second storage bin;

if La is larger than La2, the central control module judges that the actual average size of the tailings exceeds the allowable range, calculates the difference value delta L between the actual average size of the tailings and the preset average size of the tailings, adjusts the moving time length of the second bunker moving device to a corresponding value according to the delta L, and sets the delta L = La-La2.

Further, when the central control module completes the preliminary judgment on whether the moving time length of the second bin moving device is adjusted, the central control module adjusts the moving time length of the second bin moving device according to the difference value delta L between the actual average size of the tailings and the average size of the preset tailings so as to adjust the horizontal distance between the second bin and the output point of the conveyor belt, the central control module is provided with a preset first tailing average size difference value delta L1, a preset second tailing average size difference value delta L2, a preset first and second bin moving device moving time length adjusting coefficient h1, a preset second bin moving device moving time length adjusting coefficient h2 and a preset second bin moving device moving time length Ts, wherein delta L1 is less than delta L2,1 is less than h1 and less than h2,

if the delta L is less than or equal to the delta L1, the central control module judges that the actual average size of the tailings and the preset average size of the tailings are in an allowable range and does not adjust the moving time length of the second bunker moving device;

if delta L1 is less than delta L and less than or equal to delta L2, the central control module judges that the actual average size of the tailings and the preset average size of the tailings exceed an allowable range, h1 is used for adjusting the moving time length of the second bunker moving device, the adjusted moving time length of the second bunker moving device is marked as Ts1, and Ts1= h1 multiplied by Ts is set;

if delta L > -delta L2, the central control module judges that the actual average size of the tailings and the preset average size of the tailings exceed the allowable range, adjusts the moving time of the second bunker moving device by using h2, marks the adjusted moving time of the second bunker moving device as Ts2, and sets Ts2= h2 multiplied by Ts.

Further, when the central control module finishes adjusting the moving time length of the second bin moving device, the central control module determines whether to start the spray valve according to a comparison result of a horizontal distance between the first bin and the output point of the conveyor belt and a horizontal distance between the second bin and the output point of the conveyor belt, wherein the horizontal distance between the first bin and the output point of the conveyor belt is denoted as Wb, wb = Ti × Vx, i =1,2, vx is set as the moving speed of the first bin moving device and the moving speed of the second bin moving device, the horizontal distance between the second bin and the output point of the conveyor belt is denoted as Eb, eb = Ts × Vx, s =1,2, and the central control module is provided with a preset minimum distance Ebmin which can be reached by the second bin,

if Eb is less than Wb, the central control module judges that the moving time of the second storage bin moving device is secondarily adjusted, if the adjusted Eb 'is less than Ebmin, the central control module judges that Eb is adjusted to Ebmin and starts a spray valve, and if Eb' is more than or equal to Ebmin, the central control module judges that Eb is not adjusted and does not start the spray valve;

and if Eb is larger than or equal to Wb, the central control module judges that the movement duration of the first storage bin moving device is not adjusted for the second time and does not start the spray valve.

Compared with the prior art, the process has the beneficial effects that the process adjusts the rotating speed of the crusher to a corresponding value according to the difference between the actual average size of the ore and the preset average size when the raw ore is subjected to primary crushing by setting the preset first average size, the preset first average size difference, the preset crusher rotating speed adjustment coefficient, the preset crusher rotating speed, the preset ore size difference, the preset conveyor belt moving speed adjustment coefficient, the preset concentrate ore size difference, the preset moving time adjustment coefficient, the preset moving time adjustment length, the preset moving time of a bin moving device, the preset minimum size difference of the concentrate ore, the preset average size of tailings, the preset average size difference of tailings, the preset moving time adjustment coefficient of a second bin moving device, the preset moving time of the second bin moving device and the preset minimum distance which can be reached by the second bin; corresponding adjustment is carried out to the operating parameter that corresponds in the intelligent sorting equipment according to the size information of the ore that size detector detected when selecting separately the ore that the breakage was accomplished, has improved the accuracy to molybdenum ore sorting process, has improved the utilization ratio of resource, has realized the improvement to the precision and the validity that molybdenum ore selected separately and to the promotion of molybdenum ore's resource utilization ratio.

Furthermore, according to the process, whether secondary crushing is carried out or not can be judged according to the average size of the ore by setting the preset first average size and the preset second average size, so that the accurate identification capability and the accurate crushing capability of the crushing degree of the ore are improved, the accuracy and the effectiveness of molybdenum ore separation are further improved, and the resource utilization rate of the molybdenum ore is improved.

Furthermore, according to the process, the rotation speed of the crusher can be adjusted according to the difference between the actual average size of the ore and the preset average size by setting the preset first average size difference, the preset second average size difference, the preset first crusher rotation speed adjustment coefficient, the preset second crusher rotation speed adjustment coefficient and the preset crusher rotation speed, so that the accurate control of the ore crushing degree is realized, and the accuracy and the effectiveness of molybdenum ore separation and the resource utilization rate of molybdenum ore are further improved.

Furthermore, according to the process, by setting the difference value between the preset ore size and the preset ore size, whether the moving speed of the conveyor belt is adjusted or not can be preliminarily judged according to the minimum size of the crushed ore detected by the size detector, and the moving speed of the conveyor belt can be adjusted according to the difference value between the size of the crushed stone actually crushed and the size of the preset crushed stone, so that the adjusting capability of the conveying speed of the ore with different sizes is improved, the accuracy and the effectiveness of molybdenum ore separation are further improved, and the resource utilization rate of the molybdenum ore is improved.

Furthermore, according to the process, through setting the preset size of the first concentrate ore and the preset size of the second concentrate ore, whether the moving time of the first bin moving device is adjusted or not can be adjusted according to the average size of the concentrate intelligently sorted by the intelligent sorting equipment so as to distinguish the position adjustment of the first bin from the precision of the concentrate with small size, the adjusting capacity of the position of the first bin corresponding to the concentrate is improved, the sorting precision is realized, and the sorting precision and the sorting effectiveness of the molybdenum ore and the resource utilization rate of the molybdenum ore are further improved.

Furthermore, according to the process, the preset first concentrate size difference value, the preset second concentrate size difference value, the preset first moving time length adjusting coefficient, the preset second moving time length and the preset moving time length of the stock bin moving device are set, so that the moving time length of the stock bin moving device can be adjusted according to the difference delta L between the average size of the concentrate ores and the preset concentrate size, the accurate positioning capacity of the stock bin is improved, the accuracy and the effectiveness of molybdenum ore separation are further improved, and the resource utilization rate of molybdenum ores is improved.

Further, according to the process, whether the third storage bin is started or not can be judged according to the difference value between the average size of the concentrate ores obtained through calculation and the size of the preset first concentrate ores by setting the preset minimum size difference value of the concentrate ores, so that the accurate classification of small sizes in the concentrate is improved, and the accuracy and effectiveness of molybdenum ore separation are further improved, and the resource utilization rate of the molybdenum ores is further improved.

Furthermore, according to the process, the preset average size of the first tailings and the preset average size of the second tailings are set, so that whether the moving time of the second storage bin moving device is adjusted or not can be adjusted according to the actual average size of the tailings detected by the size detector to adjust the horizontal distance between the second storage bin and the output point of the conveyor belt, the accurate treatment capacity of the tailings is improved, and the accuracy and the effectiveness of molybdenum ore separation and the resource utilization rate of the molybdenum ore are further improved.

Furthermore, according to the process, the preset first tailing average size difference value, the preset second tailing average size difference value, the preset first second bin moving device moving time length adjusting coefficient, the preset second bin moving device moving time length adjusting coefficient and the preset second bin moving device moving time length are set, so that the moving time length of the second bin moving device can be adjusted according to the difference value between the actual average size of the tailings and the preset average size of the tailings, the accurate moving capacity of the bins and the accurate collecting capacity of the tailings are improved, the accuracy and the effectiveness of molybdenum ore separation are further improved, and the resource utilization rate of the molybdenum ore is improved.

Furthermore, the process can judge whether the spray valve is started or not according to the comparison result of the horizontal distance between the first bin and the conveyor belt output point and the horizontal distance between the second bin and the conveyor belt output point by presetting the minimum distance which can be reached by the second bin, so that the precision control of the spray valve is improved, the precision and the effectiveness of molybdenum ore separation are further improved, and the resource utilization rate of the molybdenum ore is further improved.

Drawings

FIG. 1 is an overall process flow diagram of an intelligent molybdenum ore sorting and pre-polishing process according to an embodiment of the invention;

FIG. 2 is a schematic process diagram of an intelligent molybdenum ore sorting and pre-polishing process according to an embodiment of the invention;

FIG. 3 is a block diagram of a process flow of an intelligent molybdenum ore sorting and pre-polishing process according to an embodiment of the invention;

fig. 4 is a specific process flow diagram of the intelligent molybdenum ore sorting and pre-polishing process according to the embodiment of the invention.

Detailed Description

In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principles of the present invention, and do not limit the scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1, an intelligent molybdenum ore sorting and pre-throwing process includes:

the method comprises the following steps that S1, the obtained raw ore is subjected to primary crushing, a central control module judges whether secondary crushing is performed on the primarily crushed ore or not according to the average size of the primarily crushed ore detected by a size detector, and when the secondary crushing is judged to be performed on the primarily crushed ore, the rotating speed of a crusher is adjusted to a corresponding value according to the difference value between the actual average size of the ore and a preset average size;

s2, the central control module controls the intelligent sorting machine to intelligently sort the crushed ores so as to sort out concentrate and tailings, and whether the moving speed of the conveyor belt 1 is adjusted to a corresponding value or not is judged according to the difference value between the size of the actual crushed ores and the size of preset ores;

s3, when the moving speed of the conveyor belt is adjusted, the central control module adjusts the moving time of the first bin moving device to a corresponding value according to the difference value between the average size of the ore concentrate and the average size of the preset ore concentrate, and adjusts the moving time of the second bin moving device to a corresponding value according to the difference value between the actual average size of the tailings and the average size of the preset tailings, and when the moving time of the first bin moving device and the moving time of the second bin moving device are adjusted, the central control module judges whether to start the spray valve according to the comparison result of the horizontal distance between the first bin 3 and the conveyor belt output point and the horizontal distance between the second bin 4 and the conveyor belt output point;

and S4, the central control module controls the ore grinding device to grind the concentrate subjected to intelligent separation, controls the flotation device to perform flotation on the concentrate subjected to ore grinding after the ore grinding is finished, and filters the concentrate subjected to flotation to finish separation.

The process comprises the steps of adjusting the rotating speed of a crusher to a corresponding value according to the difference between the actual average size of ores and the preset average size when primary crushing is carried out on raw ores by setting the preset first average size, the preset first average size difference, the preset crusher rotating speed adjusting coefficient, the preset crusher rotating speed, the preset ore size, the preset crushed stone size difference, the preset conveyor moving speed adjusting coefficient, the preset conveyor moving speed, the preset concentrate ore size, the preset concentrate size difference, the preset moving time adjusting coefficient, the preset moving time adjusting length of a bin moving device, the preset minimum size difference of concentrate ores, the preset average size of tailings, the preset moving time adjusting coefficient of a second bin moving device, the preset moving time length of the second bin moving device and the preset minimum distance which can be reached by the second bin; when the ore after crushing is sorted, the corresponding operation parameters in the intelligent sorting equipment are correspondingly adjusted according to the size information of the ore detected by the size detector, so that the accuracy of the molybdenum ore sorting process is improved, the resource utilization rate is improved, and the molybdenum ore sorting accuracy and effectiveness are improved and the molybdenum ore resource utilization rate is improved.

Specifically, in the step S1, when the crusher completes primary crushing of the raw ore, the central control module determines whether to perform secondary crushing on the primarily crushed ore according to the average size D of the ore measured by the size detector, the central control module is provided with a preset first average size D1 and a preset second average size D2, wherein D1 < D2,

According to the process, whether secondary crushing is carried out or not can be judged according to the average size of the ore by setting the preset first average size and the preset second average size, so that the accurate identification capability and the accurate crushing capability of the crushing degree of the ore are improved, the accuracy and the effectiveness of molybdenum ore separation are further improved, and the resource utilization rate of the molybdenum ore is improved.

Specifically, when the central control module finishes the judgment of whether ore is secondarily crushed and D is larger than D2, the central control module adjusts the rotating speed of the crusher according to the difference value delta D between the actual average size of the ore and the preset average size, the central control module is provided with a preset first average size difference value delta D1, a preset second average size difference value delta D2, a preset first crusher rotating speed adjusting coefficient alpha 1, a preset second crusher rotating speed adjusting coefficient alpha 2 and a preset crusher rotating speed V0, wherein delta D1 is smaller than delta D2,1 is larger than alpha 1 and smaller than alpha 2,

if delta D1 is smaller than delta D and smaller than or equal to delta D2, the central control module judges that the difference value between the average size of the ore and the preset average size exceeds an allowable range, alpha 1 is used for adjusting the rotating speed of the crusher, the adjusted rotating speed of the crusher is marked as V1, and V1= alpha 1 xV 0 is set;

if DeltaD > DeltaD2, the central control module judges that the difference value between the average size of the ore and the preset average size exceeds an allowable range, alpha 2 is used for adjusting the rotating speed of the crusher, the adjusted rotating speed of the crusher is marked as V2, and V2= alpha 2 xV 0 is set.

According to the process, the rotation speed of the crusher can be adjusted according to the difference between the actual average size of the ore and the preset average size by setting the preset first average size difference, the preset second average size difference, the preset first crusher rotation speed adjustment coefficient, the preset second crusher rotation speed adjustment coefficient and the preset crusher rotation speed, so that the accurate control of the ore crushing degree is realized, and the accuracy and the effectiveness of molybdenum ore separation and the resource utilization rate of molybdenum ore are further improved.

Specifically, in step S2, when the central control module completes the adjustment of the rotation speed of the crusher, the central control module preliminarily determines whether to adjust the moving speed of the conveyor belt according to the minimum size Dmin of the crushed ore detected by the size detector, the central control module is provided with a preset ore size D0,

When the central control module finishes primary judgment on whether the moving speed of the conveyor belt is adjusted, the central control module adjusts the moving speed of the conveyor belt according to the difference delta Dm between the size of the ore which is actually crushed and the size of the preset ore, the central control module is provided with a preset first ore size difference delta Dm1, a preset second ore size difference delta Dm2, a preset first conveyor belt moving speed adjusting coefficient beta 1, a preset second conveyor belt moving speed adjusting coefficient beta 2 and a preset conveyor belt moving speed U0, wherein the delta Dm1 is less than delta Dm2, the value is more than 0 and less than beta 1 and less than beta 2 and less than 1,

According to the process, the difference value between the preset ore size and the preset crushed stone size is set, whether the moving speed of the conveyor belt is adjusted or not can be preliminarily judged according to the minimum size of the crushed ore detected by the size detector, and the moving speed of the conveyor belt can be adjusted according to the difference value between the size of the crushed stone and the size of the preset crushed stone, so that the adjusting capacity of the conveying speed of the ore with different sizes is improved, the accuracy and the effectiveness of molybdenum ore separation are further improved, and the resource utilization rate of the molybdenum ore is improved.

Specifically, in the step S2, when the central control module completes the adjustment of the moving speed of the conveyor belt, the central control module calculates the average size L of the batch of the concentrate according to the size of the concentrate ore detected by the size detector 2 disposed in the first bin and makes a preliminary determination as to whether to adjust the moving time period of the first bin moving device according to L, the central control module is provided with a preset first average size L1 of the concentrate ore and a preset second average size L2 of the concentrate ore, wherein L1 < L2,

if L is less than or equal to L1, the central control module judges that the average size of the ore concentrate is lower than an allowable range, calculates the difference value delta Lm between the average size of the ore concentrate and the preset ore concentrate size, judges whether the third storage bin 5 is started or not according to the difference value delta Lm, and sets delta Lm = L1-L;

if L1 is larger than L and is smaller than or equal to L2, the central control module judges that the average size of the concentrate ore is within an allowable range and controls the spray valve 6 to send the concentrate ore into a first storage bin;

According to the process, the preset first concentrate ore size and the preset second concentrate ore size are set, whether the moving time of the first storage bin moving device is adjusted or not can be adjusted according to the average size of the concentrate intelligently sorted by the intelligent sorting equipment so as to distinguish the position adjustment of the first storage bin from the precision of the concentrate with small size, the adjusting capacity of the position of the first storage bin corresponding to the concentrate is improved, the sorting precision is realized, the sorting precision and the sorting effectiveness of molybdenum ore are further improved, and the resource utilization rate of the molybdenum ore is improved.

Specifically, when the central control module completes the preliminary determination of whether to adjust the moving time length of the first bin moving device and L is greater than L2, the central control module adjusts the moving time length of the first bin moving device according to the difference Delta L between the average size of the concentrate ore and the preset average size of the concentrate ore so as to adjust the position of the first bin, the central control module is provided with a preset first concentrate average size difference Delta L1, a preset second concentrate average size difference Delta L2, a preset first moving time length adjusting coefficient Gamma 1, a preset second moving time length adjusting coefficient Gamma 2 and a preset bin moving device moving time length T0, wherein Delta L1 is less than Delta L2,1 is more than Gamma 1 and less than Gamma 2,

if delta L is larger than delta L2, the central control module judges that the difference value between the average size of the actual concentrate ore and the average size of the preset concentrate ore exceeds an allowable range, the movement time length of the first bin moving device is adjusted by gamma 2, the adjusted movement time length of the first bin moving device is marked as T2, and T2= gamma 2 xT 0 is set.

According to the process, the preset first concentrate size difference value, the preset second concentrate size difference value, the preset first moving time length adjusting coefficient, the preset second moving time length and the preset moving time length of the stock bin moving device are set, so that the moving time length of the stock bin moving device can be adjusted according to the difference delta L between the average size of concentrate ores and the preset concentrate size, the accurate positioning capacity of the stock bin is improved, and the accuracy and the effectiveness of molybdenum ore separation and the resource utilization rate of molybdenum ores are further improved.

Specifically, when the central control module completes the preliminary judgment on whether the moving time of the first bin moving device is adjusted or not and L is less than or equal to L1, the central control module calculates the average size L of the concentrate ore according to the size of the concentrate ore detected by the size detector and judges whether the third bin 5 is started or not according to the difference delta Lm between L and the size of the preset first concentrate ore, delta Lm = L1-L, the central control module is provided with the minimum size difference delta Lm0 of the preset concentrate ore,

if DeltaLm >. DeltaLm 0, the central control module judges that the difference value of the average size of the concentrate ore and the preset first concentrate ore size exceeds an allowable range, starts the third storage bin and moves the position of the third storage bin to the position of the first storage bin.

when Eb is less than Wb, the central control module judges to open a second spray valve 7 arranged above the initial position of a second storage bin;

and when the Eb is larger than or equal to Wb, the central control module judges that a second spray valve arranged above the initial position of the second storage bin is not opened.

According to the process, whether the third storage bin is used or not can be judged according to the difference value between the average size of the concentrate ores obtained through calculation and the size of the preset first concentrate ores by setting the preset minimum size difference value of the concentrate ores, so that the accurate classification of small sizes in the concentrate is improved, the accuracy and effectiveness of molybdenum ore separation are further improved, and the resource utilization rate of the molybdenum ores is improved.

Specifically, when the central control module completes the adjustment of the movement time length of the first bunker moving device, the central control module calculates the actual average size La of the tailings according to the ore size of the tailings detected by the size detector 8 and performs a preliminary determination on whether the movement time length of the second bunker moving device is adjusted according to La, the central control module is provided with a preset first tailing average size La1 and a preset second tailing average size La2, wherein La1 is less than La2,

According to the process, the preset average size of the first tailings and the preset average size of the second tailings are set, so that whether the moving time of the second storage bin moving device is adjusted or not can be adjusted according to the actual average size of the tailings detected by the size detector to adjust the horizontal distance between the second storage bin and the output point of the conveyor belt, the accurate treatment capacity of the tailings is improved, the accuracy and the effectiveness of molybdenum ore separation are further improved, and the resource utilization rate of the molybdenum ore is improved.

Specifically, when the central control module completes the preliminary determination of whether to adjust the moving time length of the second bunker moving device, the central control module adjusts the moving time length of the second bunker moving device according to the difference Δ L between the actual average size of the tailings and the average size of the preset tailings so as to adjust the horizontal distance between the second bunker 4 and the output point of the conveyor belt, and the central control module is provided with a preset first tailing average size difference Δ L1, a preset second tailing average size difference Δ L2, a preset first second bunker moving time length adjusting coefficient h1, a preset second bunker moving time length adjusting coefficient h2 and a preset second bunker moving time length Ts, wherein Δ L1 is less than Δ L2,1 is less than h1 and is less than h2,

if the delta L1 is smaller than the delta L and is less than or equal to the delta L2, the central control module judges that the actual average size of the tailings and the preset average size of the tailings exceed the allowable range, h1 is used for adjusting the moving time length of the second bunker moving device, the adjusted moving time length of the second bunker moving device is recorded as Ts1, and Ts1= h1 × Ts is set;

According to the process, the preset first tailing average size difference value, the preset second tailing average size difference value, the preset first second bin moving device moving time length adjusting coefficient, the preset second bin moving device moving time length adjusting coefficient and the preset second bin moving device moving time length are set, the moving time length of the second bin moving device can be adjusted according to the difference value between the actual average size of the tailings and the preset average size of the tailings, the accurate moving capacity of the bins and the accurate collecting capacity of the tailings are improved, and the accuracy and the effectiveness of molybdenum ore separation and the resource utilization rate of molybdenum ore are further improved.

Specifically, when the central control module finishes adjusting the moving time length of the second bin moving device, the central control module determines whether to start the spray valve according to a comparison result of a horizontal distance between a first bin and a conveyor belt output point and a horizontal distance between a second bin and the conveyor belt output point, wherein the horizontal distance between the first bin and the conveyor belt output point is recorded as Wb, wb = Ti × Vx, i =1,2, vx is set as a moving speed of the first bin moving device and a moving speed of the second bin moving device, the horizontal distance between the second bin and the conveyor belt output point is recorded as Eb, eb = Ts × Vx, s =1,2, and the central control module is provided with a preset minimum distance Ebmin which can be reached by the second bin,

and if the Eb is larger than or equal to Wb, the central control module judges that the secondary adjustment is not carried out on the movement duration of the first storage bin moving device and does not start the spray valve.

According to the process, the minimum distance which can be reached by the second bin is preset, whether the spray valve is started or not can be judged according to the comparison result of the horizontal distance between the first bin and the output point of the conveyor belt and the horizontal distance between the second bin and the output point of the conveyor belt, the accurate control of the spray valve is improved, the accuracy and the effectiveness of molybdenum ore separation are further improved, and the resource utilization rate of molybdenum ores is improved.

Example 1

The molybdenum ore separation parameters in this example 1 are as follows:

the grade of the concentrate is 48 percent, the recovery rate of molybdenum is 82 percent, and the yield is 0.18 percent.

Based on the embodiment, the embodiment provides an intelligent molybdenum ore sorting and pre-throwing process: crushing the obtained molybdenum ore raw ore, wherein the crushing comprises coarse crushing, intermediate crushing and fine crushing, after the crushing is finished, the central control module controls the size detector to perform size detection on the crushed ore, the rotating speed of a crusher is adjusted to 700r/min according to the size detection result, and the moving speed of a conveyor belt is adjusted to 2.3m/s in the process of sorting concentrate and tailings; the ore grinding method comprises the steps of adjusting the moving time of a first bin moving device for 2s, adjusting the moving time of a second bin moving device for 3s, grinding the intelligently sorted ore concentrate, performing flotation after the ore grinding is completed, filtering the floated ore concentrate, selling the intelligently sorted ore concentrate, adjusting the rotating speed of a crusher, the moving speed of a conveyor belt, the moving time of the first bin moving device and the moving time of a second bin moving device according to the detected size of the ore, adjusting the rotating speed of the adjusted crusher to 710r/min, the moving speed of the conveyor belt to 2.0m/s, the moving time of the first bin moving device to 3s, and the moving time of the second bin moving device to 5s.

The parameters of the molybdenum ore obtained after separation and pre-throwing are as follows: the molybdenum grade of the concentrate is 50%, the molybdenum recovery rate is 87% and the yield is 0.2%.

Example 2

The molybdenum ore separation parameters in this example 1 are as follows:

the grade of the concentrate is 49 percent, the recovery rate of molybdenum is 80 percent, and the yield is 0.18 percent.

Based on the embodiment, the embodiment provides an intelligent molybdenum ore sorting and pre-throwing process: crushing the obtained molybdenum ore raw ore, wherein the crushing comprises coarse crushing, intermediate crushing and fine crushing, after the crushing is finished, the central control module controls the size detector to perform size detection on the crushed ore, the rotating speed of a crusher is adjusted to 710r/min according to the size detection result, and the moving speed of a conveyor belt is adjusted to 2.0m/s in the process of sorting concentrate and tailings; the method comprises the steps of adjusting the moving time of a first bin moving device for 4s, adjusting the moving time of a second bin moving device for 3s, grinding the intelligently sorted concentrate, performing flotation after grinding, filtering the floated concentrate, selling the intelligently sorted tailings, adjusting the rotating speed of a crusher, the moving speed of a conveyor belt, the moving time of the first bin moving device and the moving time of the second bin according to the detected size of the ore, adjusting the rotating speed of the crusher, the moving speed of the conveyor belt and the moving time of the first bin moving device and the moving time of the second bin moving device, wherein the adjusted rotating speed of the crusher is 720r/min, the moving speed of the conveyor belt is 1.8m/s, the moving time of the first bin moving device is 5s, and the moving time of the second bin moving device is 5s.

The parameters of the molybdenum ore obtained after separation and pre-throwing are as follows: the molybdenum grade of the concentrate is 53 percent, the molybdenum recovery rate is 89 percent, and the yield is 0.21 percent.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can be within the protection scope of the invention.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An intelligent molybdenum ore separation and pre-throwing process is characterized by comprising the following steps:

s2, the central control module controls the intelligent sorting machine to intelligently sort the crushed ores so as to sort out concentrate and tailings, and whether the moving speed of the conveyor belt is adjusted to a corresponding value is judged according to the difference value between the size of the actual crushed ores and the size of preset ores;

s3, when the moving speed of the conveyor belt is adjusted, the central control module adjusts the moving time of the first bin moving device to a corresponding value according to the difference value between the average size of the ore concentrate and the average size of the preset ore concentrate, adjusts the moving time of the second bin moving device to a corresponding value according to the difference value between the actual average size of the tailings and the average size of the preset tailings, and when the moving time of the first bin moving device and the moving time of the second bin moving device are adjusted, the central control module judges whether to start the spray valve according to the comparison result of the horizontal distance between the first bin and the conveyor belt output point and the horizontal distance between the second bin and the conveyor belt output point;

and S4, the central control module controls the ore grinding device to grind the concentrate subjected to intelligent separation, controls the flotation device to perform flotation on the concentrate subjected to ore grinding after the ore grinding is completed, and filters the concentrate subjected to flotation to complete separation.

2. The intelligent molybdenum ore sorting and pre-throwing process according to claim 1, wherein in the step S1, when the crusher completes primary crushing of raw ore, the central control module judges whether to perform secondary crushing on the primarily crushed ore according to the average ore size D measured by the size detector, the central control module is provided with a preset first average size D1 and a preset second average size D2, wherein D1 is less than D2,

3. The intelligent molybdenum ore sorting and pre-throwing process according to claim 2, wherein when the central control module completes the determination of whether ore is secondarily crushed and D > D2, the central control module adjusts the rotation speed of the crusher according to the difference DeltaD between the actual average size of the ore and the preset average size, the central control module is provided with a preset first average size difference DeltaD 1, a preset second average size difference DeltaD 2, a preset first crusher rotation speed adjustment coefficient alpha 1, a preset second crusher rotation speed adjustment coefficient alpha 2 and a preset crusher rotation speed V0, wherein DeltaD 1 is less than DeltaD 2, and 1 < alpha 2,

if the delta D is less than or equal to the delta D1, the central control module judges that the difference value between the actual average size of the ore and the preset average size is within an allowable range and does not adjust the rotating speed of the crusher;

4. The intelligent molybdenum ore separation and pre-throwing process according to claim 3, wherein in the step S2, when the central control module completes the adjustment of the rotation speed of the crusher, the central control module preliminarily determines whether the moving speed of the conveyor belt is adjusted according to the minimum size Dmin of the crushed ore detected by the size detector, the central control module is provided with a preset ore size D0,

if Dmin is larger than or equal to D0, the central control module judges that the minimum size of the crushed ore exceeds an allowable range, calculates the difference value delta Dm between the actual crushed ore size and the preset ore size, adjusts the moving speed of the conveyor belt to a corresponding value, and sets delta Dm = Dmin-D0;

5. The intelligent molybdenum ore sorting and pre-throwing process of claim 4, wherein in the step S2, when the central control module completes the adjustment of the moving speed of the conveyor belt, the central control module calculates the average size L of the batch of ore concentrate according to the ore size of the ore concentrate detected by the size detector arranged in the first bin and performs a preliminary judgment on whether to adjust the moving time of the first bin moving device according to L, the central control module is provided with a preset first average size L1 of ore concentrate and a preset second average size L2 of ore concentrate, wherein L1 is less than L2,

if L is less than or equal to L1, the central control module judges that the average size of the ore concentrate is lower than an allowable range, calculates a difference value delta Lm between the average size of the ore concentrate and the preset ore concentrate size, judges whether a third material bin is started or not according to the difference value delta Lm, and sets delta Lm = L1-L;

if L1 is larger than L and is smaller than or equal to L2, the central control module judges that the average size of the concentrate ore is within an allowable range and controls a spray valve to send the concentrate ore into a first storage bin;

6. The intelligent molybdenum ore sorting and pre-throwing process according to claim 5, wherein when the central control module completes the preliminary determination of whether to adjust the moving time period of the first bin moving device and L is greater than L2, the central control module adjusts the moving time period of the first bin moving device according to the difference DeltaL between the average size of the ore concentrate and the average size of the preset ore concentrate to adjust the position of the first bin, the central control module is provided with a preset first ore concentrate average size difference DeltaL 1, a preset second ore concentrate average size difference DeltaL 2, a preset first moving time period adjusting coefficient gamma 1, a preset second moving time period adjusting coefficient gamma 2 and a preset bin moving device moving time period T0, wherein DeltaL 1 is less than DeltaL 2,1 < gamma 2,

if delta L is less than or equal to delta L1, the central control module judges that the difference value between the average size of actual concentrate ores and the average size of preset concentrate ores is within an allowable range and does not adjust the moving time length of the first storage bin moving device;

if delta L1 is less than delta L and less than or equal to delta L2, the central control module judges that the difference value between the average size of actual concentrate ores and the average size of preset concentrate ores exceeds an allowable range and adjusts the moving time length of the first bin moving device by using gamma 1, the adjusted moving time length of the first bin moving device is recorded as T1, and T1= gamma 1 xT 0 is set;

7. The intelligent molybdenum ore sorting and pre-throwing process according to claim 5, wherein when the central control module completes the preliminary determination of whether to adjust the moving time of the first bin moving device and L is less than or equal to L1, the central control module calculates the average size L of the ore concentrate according to the ore concentrate size detected by the size detector and determines whether to start the third bin according to the difference DeltaLm between L and the preset first ore concentrate size, deltaLm = L1-L, the central control module is provided with the preset minimum ore concentrate size difference DeltaLm 0,

if DeltaLm >. DeltaLm 0, the central control module judges that the difference value between the average size of the concentrate ore and the preset first concentrate ore size exceeds an allowable range, starts the third storage bin and moves the position of the third storage bin to the position of the first storage bin;

when Eb is less than Wb, the central control module judges to open a second spray valve arranged above the initial position of a second storage bin;

8. The intelligent molybdenum ore sorting and pre-throwing process according to claim 7, wherein when the central control module completes the adjustment of the moving time of the first bin moving device, the central control module calculates the actual average size La of the tailings according to the ore size of the tailings detected by the size detector and performs a preliminary judgment on whether the moving time of the second bin moving device is adjusted according to La, the central control module is provided with a preset first tailing average size La1 and a preset second tailing average size La2, wherein La1 is less than La2,

if La is larger than La2, the central control module judges that the actual average size of the tailings exceeds an allowable range, calculates the difference delta L between the actual average size of the tailings and the preset average size of the tailings, adjusts the moving time length of the second bunker moving device to a corresponding value according to the delta L, and sets the delta L = La-La2.

9. The intelligent molybdenum ore sorting and pre-throwing process according to claim 8, wherein when the central control module completes the preliminary determination of whether to adjust the moving time of the second bin moving device, the central control module adjusts the moving time of the second bin moving device according to a difference Δ L between an actual average size of tailings and an average size of preset tailings to adjust a horizontal distance between the second bin and the conveyor belt output point, the central control module is provided with a preset first tailing average size difference Δ L1, a preset second tailing average size difference Δ L2, a preset first second bin moving device moving time adjusting coefficient h1, a preset second bin moving device moving time adjusting coefficient h2 and a preset second bin moving device moving time Ts, wherein L1 is less than Δ L2,1 h is less than Δ 1 and less than Δ h2,

if delta L is larger than delta L2, the central control module judges that the actual average size of the tailings and the preset average size of the tailings exceed an allowable range, h2 is used for adjusting the moving time of the second bunker moving device, the adjusted moving time of the second bunker moving device is marked as Ts2, and Ts2= h2 multiplied by Ts is set.

10. The intelligent molybdenum ore sorting and pre-throwing process according to claim 9, wherein when the central control module completes the adjustment of the moving time length of the second bin moving device, the central control module determines whether to activate the spray valve according to the comparison result of the horizontal distance between the first bin and the output point of the conveyor belt and the horizontal distance between the second bin and the output point of the conveyor belt, wherein the horizontal distance between the first bin and the output point of the conveyor belt is denoted as Wb, wb = Ti x Vx, i =1,2, vx is set as the moving speed of the first bin moving device and the moving speed of the second bin moving device, the horizontal distance between the second bin and the output point of the conveyor belt is denoted as Eb, eb = Ts x Vx, s =1,2, the central control module is provided with a minimum distance Ebmin which the second bin can reach,

if Eb is smaller than Wb, the central control module judges that the secondary adjustment is carried out on the movement time length of the second storage bin moving device, if the adjusted Eb 'is smaller than Ebmin, the central control module judges that Eb is adjusted to Ebmin and starts a spray valve, and if Eb' is larger than or equal to Ebmin, the central control module judges that Eb is not adjusted and does not start the spray valve;