CA-3246261-C - INTELLIGENT FLOTATION DOSING SYSTEM AND METHOD BASED ON DETECTION OF FLOTATION TAILING SLURRY

CA3246261CCA 3246261 CCA3246261 CCA 3246261CCA-3246261-C

Abstract

The present disclosure relates to an intelligent flotation dosing system and method based on detection of a flotation tailing slurry, and belongs to the technical field of flotation dosing. The present disclosure solves the problems such as lagging adjustment and inaccurate agent amounts of the manual adjustment for flotation dosing in the art. The intelligent flotation dosing system based on detection of a flotation tailing slurry provided in the present disclosure includes a flotation information acquisition unit, an ash content intelligent prediction unit, and a distributed control dosing unit, where the flotation information acquisition unit is configured to acquire information about a flow rate, a concentration, a coarse particle content, and an image of a slurry, the ash content intelligent prediction unit is configured to process the information about the flow rate, the concentration, the coarse particle content, and the image of the slurry to obtain an ash content of the slurry, and the distributed control dosing unit is configured to adjust a dosing amount according to the ash content of the slurry and a flow rate, a concentration, and a coarse particle content of the slurry. The present disclosure can allow the uninterrupted real-time monitoring of flotation parameters to adjust a dosing amount timely.

Inventors

Yaowen XING
Xiahui GUI
Qinshan LIU
Yijun CAO
Lanhao WANG
Jiongtian Liu

Assignees

CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Dates

Publication Date: 20260505
Application Date: 20230306
Priority Date: 20220323

Claims (10)

CLAIMS 1. An intelligent flotation dosing system based on detection of a flotation tailing slurry, characterized by comprising a flotation information acquisition unit, an ash content intelligent prediction unit, and a distributed control dosing unit, wherein the flotation information acquisition unit is configured to acquire information about a flow rate, a concentration, a coarse particle content, and an image of a slurry, the ash content intelligent prediction unit is configured to process the information about the flow rate, the concentration, the coarse particle content, and the image of the slurry to obtain an ash content of the slurry, and the distributed control dosing unit is configured to adjust a dosing amount according to the ash content of the slurry and the flow rate, the concentration, and the coarse particle content of the slurry.
2. The system for the intelligent flotation dosing based on the detection of the flotation tailing slurry according to claim 1, characterized by further comprising a slurry conditioner (1) and a flotation device (2), wherein the slurry conditioner (1) is configured to pretreat the slurry to obtain a pretreated slurry and the flotation device (2) is configured to allow flotation for the pretreated slurry.
3. The system for the intelligent flotation dosing based on the detection of the flotation tailing slurry according to claim 2, characterized in that the slurry conditioner (1) comprises a barrel body (11), an upper end of the barrel body (11) is provided with a water-inlet pipe (12) and a material-inlet pipe (13), and a lower end of the barrel body (11) is provided with a material-outlet pipe (14).
4. The system for the intelligent flotation dosing based on the detection of the flotation tailing slurry according to claim 2, characterized in that the flotation information acquisition unit comprises a flow meter (31) and a concentration meter (32), and the flow meter (31) and the concentration meter (32) both are arranged downstream from the slurry conditioner (1).
5. The system for the intelligent flotation dosing based on the detection of the flotation tailing slurry according to claim 4, characterized in that the flow meter (31) and the concentration meter (32) are configured to acquire the flow rate and the concentration of the slurry flowing into the flotation device (2) from the slurry conditioner (1), respectively.
6. The system for the intelligent flotation dosing based on the detection of the flotation tailing slurry according to claim 4, characterized in that the flotation information acquisition unit further comprises a force sensor (33) and an industrial camera (34), and the force sensor (33) and the industrial camera (34) both are arranged at a tailing outlet of the flotation device (2).
7. The system for the intelligent flotation dosing based on the detection of the flotation tailing slurry according to claim 6, characterized in that the force sensor (33) is configured to acquire vibration data of a baffle impacted by the slurry, and the industrial camera (34) is12 CPST Doc: 1414-8045-0063 configured to acquire the image of the slurry.
8. The system for the intelligent flotation dosing based on the detection of the flotation tailing slurry according to claim 6, characterized in that the ash content intelligent prediction unit comprises an image ash content prediction unit and a vibration mode recognition unit, wherein the image ash content prediction unit is configured to calculate a grayscale of the slurry according to the image of the slurry, and the vibration mode recognition unit is configured to calculate the coarse particle content of the slurry according to vibration data of a baffle impacted by the slurry that is acquired by the force sensor (33).
9. The intelligent flotation dosing system based on the detection of the flotation tailing slurry according to claims 1 to 8, characterized in that the distributed control dosing unit comprises a centralized control center unit and a flotation control center unit, wherein the centralized control center unit is configured to send a dosing instruction to the flotation control center unit according to the ash content, the coarse particle content, an amount, and the concentration of the slurry, and the flotation control center unit is configured to parse the dosing instruction and send a dosing amount instruction to an automatic dosing chamber.
10. An intelligent flotation dosing method based on detection of a flotation tailing slurry, characterized in that the intelligent flotation dosing method is applied to the intelligent flotation dosing system based on the detection of the flotation tailing slurry according to claims 1 to 9 and comprises the following steps: S1: treating a flotation feed through the slurry conditioner (1) to obtain a treated flotation feed, acquiring the information about the flow rate and the concentration by the flow meter (31) and the concentration meter (32), respectively, separating the treated flotation feed by the flotation device (2) to obtain a tailing, and allowing the tailing to enter an information acquisition zone; S2: feeding information acquired by the force sensor (33) to the vibration mode recognition unit based on a mode recognition algorithm, and analyzing the coarse particle content in the tailing based on the mode recognition algorithm of support vector machine (SVM) regression by a model trained with previous data; and feeding information acquired by the industrial camera (34) to the image ash content prediction unit based on a neural network, and predicting the ash content of the tailing in real time through analysis of an image grayscale distribution in combination with the coarse particle content; and S3: transmitting the information about the ash content, the coarse particle content, the amount, and the concentration of the slurry into the centralized control center unit, and sending a dosing instruction by a decision-making system of the centralized control center unit to the13 CPST Doc: 1414-8045-0063 flotation control center unit according to the information about the ash content, the coarse particle content, the amount, and the concentration of the slurry, to adjust the ash content of the tailing and allow closed-loop control.

Description

INTELLIGENT FLOTATION DOSING SYSTEM AND METHOD BASED ON DETECTION OF FLOTATION TAILING SLURRY TECHNICAL FIELD The present disclosure relates to the technical field of flotation dosing, and in particular relates to an intelligent flotation dosing system and method based on detection of a flotation tailing slurry. BACKGROUND The flotation technology is the most economical and effective method for separating fine coal slime, and is also an important method for deep coal separation. The flotation technology plays a vital role in the coal slime water treatment of a coal preparation plant and the implementation of closed-loop circulation of coal slime water. The accurate control of dosing amounts during the flotation process is an important means to ensure an ash content in flotation clean coals and a recovery rate of flotation clean coals and reduce the consumption of agents. If the dosing amounts during a flotation process are too large, the selectivity will be poor, which will increase the ash content in clean coal while increasing the consumption of agents and cannot guarantee a quality of clean coal. If the dosing amounts during the flotation process are too small, the selectivity will be too high, which will reduce the yield of clean coal. The current flotation systems of coal preparation plants have a low intelligent level, and the flotation dosing is mainly determined manually. Thus, a flotation effect depends on the production experience and the careful management degree of a flotation operator. According to sensory results such as a color of the slurry observed by eyes and whether there is a loss of coarse mineral particles in a flotation tailing determined by hand touch, the flotation dosing is determined manually, which cannot allow the accurate quantification, is lagging and subjective, and results in unstable production situations. Because a flotation dosing device is generally arranged at a high position, there is large physical exertion due to frequent adjustment. In addition, a pungent odor caused by the volatilization of agents will affect the health of a flotation operator, and thus a flotation working environment needs to be improved. The traditional automatic flotation dosing systems mostly adopt open-loop control. In these systems, flotation agents are fed according to fixed values determined by a flotation operator, and there is a lack of a feedback link of automatically adjusting flotation dosing amounts according to working conditions. With the increasingly-strict requirements for a quality of flotation on the market and the continuous improvement of an intelligent level of an industrial process, the intelligent coal slime flotation has attracted more and more attention. One of the key2 CPST Doc: 1414-8045-0063 links for intelligent control of a flotation process is to allow the real-time detection of product indexes during a flotation process. Currently, an ash content in a flotation slurry is mainly predicted by an image method and a direct detection method. In the traditional image method, an ash content in a concentrate is predicted through the analysis of a foam and grayscale of a concentrate. Because the ash content in a concentrate fluctuates in a relatively-small range and there is a high requirement for a prediction accuracy, it is difficult to allow the accurate prediction of the ash content, and the deviation of prediction of the ash content in a concentrate will also expand an impact on a recovery rate. In the direct detection method, the ash content in a concentrate slurry is currently detected by a slurry ash analyzer in most cases, and there is a lack of detection of a tailing slurry, reducing the control of the recovery rate. In addition, the slurry ash analyzer involves a high investment cost, and a measurement result of the slurry ash analyzer is lagging to some degree, such that a real-time monitoring effect cannot be allowed and the dosing amounts cannot be adjusted in time, making a flotation efficiency reduced. SUMMARY In view of the above analysis, an embodiment of the present disclosure is intended to provide an intelligent flotation dosing system and method based on detection of a flotation tailing slurry, to solve the problems such as lagging adjustment and inaccurate agent amounts in the existing manual adjustment for flotation dosing. In a first aspect, the present disclosure provides an intelligent flotation dosing system based on detection of a flotation tailing slurry, including a flotation information acquisition unit, an ash content intelligent prediction unit, and a distributed control dosing unit, where the flotation information acquisition unit is configured to acquire information about a flow rate, a concentration, a coarse particle content, and an image of a slurry, the ash content intelligent prediction unit is configured to process the information about the flow rate, the concentration, the coarse particle content, and the image of the slurry to obt