CN-122006886-A - Tower mill-cyclone and flotation machine combined control system and method

CN122006886ACN 122006886 ACN122006886 ACN 122006886ACN-122006886-A

Abstract

The invention provides a tower mill-cyclone and flotation machine combined control system and method, and relates to the field of mineral processing. The invention constructs a multi-parameter integrated monitoring and closed-loop control system, acquires the grade data of roughing concentrate and tailings in real time through the ore pulp grade detector, dynamically adjusts grinding classification parameters in a preset grinding fineness interval by taking roughing index stability as a core target, and forms a high-efficiency closed-loop mechanism of detection, feedback and regulation. The invention adopts dynamic adaptation logic of rough concentration index traction grinding fineness to ensure that the grinding fineness is always anchored in a rough concentration optimal interval. The intelligent control system realizes full-dimensional real-time sensing and accurate regulation of feeding working condition fluctuation, captures feeding flow fluctuation in real time through a liquid level meter, dynamically monitors pulp concentration change through a concentration sensor, and drives executing components such as a variable-frequency pulp pump, an electric control valve, a tower mill and the like to act cooperatively after multi-parameter logic operation is completed by an intelligent electronic control unit.

Inventors

YAO JIN
YIN XUEMING
Du Weifan
YIN WANZHONG
SUN WENJU

Assignees

东北大学

Dates

Publication Date: 20260512
Application Date: 20260413

Claims (9)

1. The tower mill-cyclone and flotation machine combined control system is characterized by comprising a core equipment module, a monitoring sensing module and an intelligent control module; The core equipment module comprises a tower mill, a cyclone, a pulp stirring barrel, a variable-frequency slurry pump, an electric control valve, a flotation machine, a medicament stirring barrel and a metering pump; The monitoring sensing module comprises an ore pulp level meter, a concentration sensor CG, a pressure sensor PT, a granularity analyzer and an ore pulp grade analyzer; The intelligent control module is respectively connected with a main motor of the tower mill, a motor of the variable-frequency slurry pump, an electric control valve, a slurry stirring barrel, a metering pump, a flotation machine, a cyclone, a slurry level meter, CG, PT, a particle size analyzer and a slurry grade analyzer through wires, and is used for acquiring data detected by the slurry level meter, CG, PT, the particle size analyzer and the slurry grade analyzer and controlling the rotating speed of the main motor of the tower mill, the frequency of the motor of the variable-frequency slurry pump, the opening of a water valve of the slurry stirring barrel, the opening of the electric control valve, the stroke length and stroke frequency of the metering pump, the frequency of a frequency converter of a blower of the flotation machine, the scraper speed of the flotation machine and the opening of a water valve of the cyclone.
2. The combined control system of the tower mill-cyclone and the flotation machine according to claim 1 is characterized in that a reagent stirring barrel is connected with a feeding hole of a pulp stirring barrel through a pipeline, a metering pump is arranged between the reagent stirring barrel and the pipeline of the pulp stirring barrel, the feeding hole of the pulp stirring barrel is connected with a feeding pulp pipeline and an overflow pipeline of the tower mill, a discharging hole of the pulp stirring barrel is connected with a feeding end of a variable-frequency slurry pump through a discharging pipeline, the discharging end of the variable-frequency slurry pump is connected with a feeding end of the cyclone through the discharging pipeline, an electric control valve is arranged on the discharging pipeline between the discharging end of the variable-frequency slurry pump and the feeding end of the cyclone, a sand sedimentation outlet of the cyclone is connected with the feeding end of the tower mill through a pipeline, and an overflow outlet of the cyclone is connected with the flotation machine through an overflow pipeline.
3. The combined control system of a tower mill-cyclone and a flotation machine according to claim 1, wherein a pulp level gauge is arranged in a pulp stirring barrel and used for detecting the pulp level height in the pulp stirring barrel, CG is arranged between an electric control valve and the cyclone and used for detecting the pulp concentration entering the cyclone, PT is arranged between the electric control valve and the cyclone and used for detecting the feeding pressure of the cyclone, a particle size analyzer is arranged on an overflow pipeline of the cyclone and used for detecting the particle size of overflow pulp, and a pulp grade analyzer is used for detecting the grade of target elements in concentrate and tailings produced by the flotation machine.
4. The combined control method of the tower mill-cyclone and the flotation machine is realized based on a combined control system of the tower mill-cyclone and the flotation machine, and is characterized by comprising the following steps of: Setting a data threshold value, wherein the data threshold value comprises a maximum pressure value and a minimum pressure value of ore feeding pressure, a high liquid level threshold value and a low liquid level threshold value of the liquid level height of ore pulp in an ore pulp stirring barrel, an ore pulp concentration value, a tailing grade threshold value and a concentrate grade threshold value, and a granularity maximum value and a granularity minimum value of flotation roughing; The intelligent control module collects real-time data, wherein the real-time data comprise the height of the pulp liquid level in the pulp stirring barrel, the concentration of the pulp entering the cyclone, the feeding pressure P of the cyclone, the granularity of overflow pulp, the grade of target elements in tailings and the grade of target elements in concentrate, wherein the height of the pulp liquid level in the pulp stirring barrel, the concentration of the pulp entering the cyclone, the feeding pressure P of the cyclone, the granularity of overflow pulp, the grade of target elements in tailings and the grade of target elements in concentrate are collected in real time through the pulp grade analyzer; And adjusting the device parameters in the core device module according to the real-time data and the data threshold.
5. The combined tower mill-cyclone and flotation machine control method according to claim 4, wherein adjusting the equipment parameters in the core equipment module according to the real-time data and the data threshold comprises: according to P, maximum pressure value and minimum pressure value, through intelligent control module adjustment electric control valve's aperture and the frequency of the motor of frequency conversion sediment stuff pump, specifically include: when P is larger than the maximum pressure value, the intelligent control module reduces the frequency of the motor of the variable-frequency slurry pump, increases the opening of the electric control valve, when P is smaller than the minimum pressure value, increases the frequency of the motor of the variable-frequency slurry pump, reduces the opening of the electric control valve, and when P is larger than or equal to the minimum pressure value and smaller than or equal to the maximum pressure value, no adjustment is made.
6. The combined tower mill-cyclone and flotation machine control method according to claim 4, wherein adjusting the equipment parameters in the core equipment module according to the real-time data and the data threshold comprises: according to the pulp liquid level, a high liquid level threshold value and a low liquid level threshold value in the pulp stirring barrel, the frequency of a motor of the variable-frequency pulp pump, the opening of an electric control valve and the rotating speed of a main motor of the tower mill are adjusted through an intelligent control module, and the method specifically comprises the following steps: When the pulp liquid level in the pulp stirring barrel is smaller than the low liquid level threshold, the intelligent control module reduces the frequency of the motor of the variable-frequency pulp pump, reduces the opening of the electric control valve, reduces the rotating speed of the main motor of the tower mill, and when the pulp liquid level in the pulp stirring barrel is larger than or equal to the low liquid level threshold and smaller than or equal to the high liquid level threshold, no adjustment is made.
7. The combined tower mill-cyclone and flotation machine control method according to claim 4, wherein adjusting the equipment parameters in the core equipment module according to the real-time data and the data threshold comprises: according to pulp concentration and pulp concentration value, adjust the aperture of the water valve of pulp agitator through intelligent control module, specifically include: when the pulp concentration is larger than the pulp concentration value, the opening of the water valve of the pulp stirring barrel is increased through the intelligent control module, and when the pulp concentration is smaller than or equal to the pulp concentration value, adjustment is not performed.
8. The combined tower mill-cyclone and flotation machine control method according to claim 4, wherein adjusting the equipment parameters in the core equipment module according to the real-time data and the data threshold comprises: according to the grade of target elements in tailings, the grade of target elements in concentrate, a tailings grade threshold value and a concentrate grade threshold value, the stroke length and the stroke frequency of a metering pump are adjusted through an intelligent control module so as to adjust the dosage of a roughing section flotation reagent and the dosage of a roughing section inhibitor, and adjust the scraper speed of a flotation machine and the frequency converter frequency of a blower of the flotation machine, the method specifically comprises the following steps: When the grade of the target element in the tailings is greater than or equal to a tailings grade threshold value and the grade of the target element in the concentrate is greater than or equal to a concentrate grade threshold value, the intelligent control module controls the metering pump to reduce the dosage of the flotation reagent in the roughing section, increase the dosage of the inhibitor in the roughing section and improve the scraper speed of the flotation machine; when the grade of the target element in the tailings is greater than or equal to a tailings grade threshold value and the grade of the target element in the concentrate is smaller than a concentrate grade threshold value, the intelligent control module controls the metering pump to increase the dosage of the flotation reagent in the roughing section, and the frequency converter frequency of the air blower of the flotation machine is increased; and when the grade of the target element in the tailings is smaller than the tailings grade threshold value, no adjustment is made.
9. The combined tower mill-cyclone and flotation machine control method according to claim 4, wherein adjusting the equipment parameters in the core equipment module according to the real-time data and the data threshold comprises: According to the granularity of cyclone overflow ore pulp, the granularity maximum value and the granularity minimum value of flotation rougher, the rotating speed of a main motor of a tower mill is adjusted through an intelligent control module, and the opening degree of a water valve of the cyclone or the frequency of a variable-frequency slurry pump specifically comprises: When the granularity of the overflow ore pulp of the cyclone is larger than the maximum granularity, the rotating speed of a main motor of the tower mill is increased, the opening of a water valve of the cyclone is reduced or the frequency of a variable-frequency slurry pump is increased; when the granularity of the overflow ore pulp of the cyclone is smaller than the granularity minimum value, the rotating speed of the main motor of the tower mill is reduced, the opening degree of a water valve of the cyclone is increased or the frequency of a variable-frequency slag pulp pump is reduced.

Description

Tower mill-cyclone and flotation machine combined control system and method Technical Field The invention relates to the field of mineral processing, in particular to a tower mill-cyclone and flotation machine combined control system and method. Background In the mineral separation production flow, the grinding classification is one of key working procedures, and the purpose of the mineral separation method is to grind raw ores to the granularity meeting the requirements of the subsequent separation process, so that the mineral separation efficiency and the product quality are directly affected. Currently, most of the grinding classification systems commonly used in mineral processing plants are in a closed cycle mode, and the core equipment combination generally comprises grinding equipment (such as tower mills, ball mills and the like) and classification equipment (such as cyclones, vibrating screens and the like). The flotation system rougher flotation is regulated, and flotation indexes are regulated by means of the addition amount, the aeration amount and the like of agents for flotation of the flotation system, and are not combined with the front-stage ore grinding classification system to be regulated in an overall mode. At present, a grinding flotation system consisting of a tower mill, a cyclone and a flotation machine in a mineral processing plant has a plurality of problems in actual operation, namely, the lack of a dynamic response mechanism to fluctuation of ore feeding conditions easily causes instability of ore feeding pressure of the cyclone and unbalance of ore grinding load of the tower mill when the flow and concentration of ore pulp fed from the front end fluctuate, further causes exceeding of the granularity of ore grinding discharge, and the fact that part of the system relies on manual operation to adjust the pressure of the cyclone, has strong response hysteresis, cannot match with the change of the throughput of the tower mill in real time, and easily causes 'material breaking' or 'chute overflowing' accidents of an ore pulp stirring barrel, so that continuity of the ore grinding process is poor, and energy consumption and material loss are increased. Thirdly, the ore grinding system is a direct ore feeding link of flotation roughing, and the roughing effect directly determines the performance quality of the whole flotation system. The current two lack of a linkage mechanism, so that flotation roughing indexes cannot be fed back reversely in time, parameters of a grinding grading system are difficult to dynamically adjust according to roughing effects, and overall flotation efficiency and index stability are affected. At present, the automatic control of single equipment (such as a hydrocyclone and a flotation machine) is widely applied to the field of mineral processing, but partial control methods still have the problems of poor adaptability to nonlinear and time-varying working conditions, control lag caused by mechanism model deviation and the like, or the automatic control method is only used for parameter adjustment of single equipment, and does not carry out deep research and interlocking control on the ore grinding flotation process of a tower mill-cyclone and a flotation machine. Therefore, the integrated multi-parameter real-time monitoring and intelligent regulation system is developed, the problems of response lag and low regulation precision in the prior art are solved, and the integrated multi-parameter real-time monitoring and intelligent regulation system has important significance for improving the index of flotation concentrate products and ensuring the index stability of a flotation system. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide a tower mill-cyclone and flotation machine combined control system which comprises a core equipment module, a monitoring sensing module and an intelligent control module; The core equipment module comprises a tower mill, a cyclone, a pulp stirring barrel, a variable-frequency slurry pump, an electric control valve, a flotation machine, a medicament stirring barrel and a metering pump; The monitoring sensing module comprises an ore pulp level meter, a concentration sensor CG, a pressure sensor PT, a granularity analyzer and an ore pulp grade analyzer; The intelligent control module is respectively connected with a main motor of the tower mill, a motor of the variable-frequency slurry pump, an electric control valve, a slurry stirring barrel, a metering pump, a flotation machine, a cyclone, a slurry level meter, CG, PT, a particle size analyzer and a slurry grade analyzer through wires, and is used for acquiring data detected by the slurry level meter, CG, PT, the particle size analyzer and the slurry grade analyzer and controlling the rotating speed of the main motor of the tower mill, the frequency of the motor of the variable-frequency slurry pump, the opening of a water valve of the