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A self-healing control method for abnormal feeding conditions in the dense dehydration process

A technology of abnormal working conditions and self-healing control, applied in the field of dressing and smelting, can solve the problems of restricting the industrialization process of the dense dehydration process, low safety, and high energy consumption

Active Publication Date: 2020-10-23
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Factory operators mainly rely on their own experience to make adjustments, and there are often problems such as high energy consumption and low safety, which seriously restrict the industrialization process of the dense dehydration process, thereby affecting the comprehensive economic benefits

Method used

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  • A self-healing control method for abnormal feeding conditions in the dense dehydration process
  • A self-healing control method for abnormal feeding conditions in the dense dehydration process
  • A self-healing control method for abnormal feeding conditions in the dense dehydration process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0127] Thickener dehydration process flow chart, such as Figure 14 As shown, this embodiment uses three pressure sensors to measure the pressure of the pulp to be tested at different heights in the thickener. The middle position between sensor 1 and pressure sensor 3;

[0128] The feed to the thickener is the concentrate selected during the flotation process. The concentrate scraped from the flotation column flows into the concentrate pump pool, and then is pumped into the thickener through the slurry pump. The central part of the thickener is the feeding well, and the concentrate from the flotation is sent to the central feeding well for buffering and mixing, and then flows into the thickener, and settles under the action of gravity. The traveling motor is driven by the hydraulic system and moves along the thickener The track on the outer wall drives the rake frame to rotate around the center, and the scraper under the rake frame stirs the mud layer to promote the concentrat...

Embodiment 2

[0243] For abnormality 2, the judgment rule for this abnormality is: the concentrate flow rate is lower than 15m 3 / h and the concentration is lower than 20%, and the duration exceeds 5 minutes, it is considered that the concentrate pump is working abnormally, such as Figure 5 shown. The amount of ore fed to the thickener will fluctuate, and there is a risk of the concentrate pump pool taking place.

[0244] When this kind of abnormal working condition occurs, according to the reference, the filter press still needs 4 cabinets of filter press in actual production. Since there will be no potential safety hazards, according to the operating experience of the employees, no treatment will be done, which increases the cost of the filter press. failure rate. In this regard, the multi-layer optimization control results proposed by the application are shown in Table 2:

[0245] Table 2: Multi-level optimal control results for anomaly 2

[0246]

[0247] Tier 1 to 3 represent the...

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Abstract

The invention proposes a self-healing control method for abnormal feeding conditions in the dense dehydration process. The process includes: describing the first-level optimization model, including: minimizing the maximum pressure value and maximizing the minimum concentration value; The third layer optimization model is described to minimize the production energy consumption cost within the safety limit; the third layer optimization model is described to relax the economic indicators to meet the habits of on-site operators; the present invention is aimed at entering the mineral processing workshop of a gold mining plant We have conducted research on self-healing control methods for abnormal working conditions of materials, which can realize that when abnormal working conditions occur in the on-site thickening dewatering process, we can still continue to provide operational guidance for the subsequent production process and find out a more accurate and reasonable drawing time to assist The operator controls to ensure safe and stable operation of the thickening dehydration process, improve comprehensive economic benefits, and reduce the failure rate of the filter press.

Description

technical field [0001] The invention belongs to the field of dressing and smelting, and in particular relates to a self-healing control method for abnormal feeding conditions in the dense dehydration process. Background technique [0002] Mineral processing is the process of recovering high-grade minerals from lean, fine, and miscellaneous ores. It is a typical process industry process. Its production mechanism is complex and there are many process links. Each process interacts and couples with each other. The dense dehydration process is one of the very important processes, which plays a role in increasing the concentration of the pulp, separating solids from liquids, and adjusting the impact of production disturbances in upstream processes on downstream processes. The thickening dehydration process mainly includes two main equipments, thickener and filter press. The thickener is a device that increases the concentration of the pulp based on gravity settlement, and is the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D36/04B01D21/30
CPCB01D21/30B01D36/04
Inventor 贾润达张斌张华鲁张树磊张卫敏
Owner NORTHEASTERN UNIV LIAONING