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On-line evaluation and control method of flotation coal preparation process based on foam layer characteristics

A foam layer and coal preparation technology, applied in flotation, solid separation, material impedance, etc., can solve problems such as limitations and uncontrollable process variables, and achieve the effect of rapid detection and analysis

Active Publication Date: 2021-12-10
TIANDI (TANGSHAN) MINING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The curve depends on the surface hydrophobicity of the coal particles, the particle size distribution and the ash content of the feed, and is limited by the quality of the floated coal, these process variables are uncontrollable

Method used

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  • On-line evaluation and control method of flotation coal preparation process based on foam layer characteristics
  • On-line evaluation and control method of flotation coal preparation process based on foam layer characteristics
  • On-line evaluation and control method of flotation coal preparation process based on foam layer characteristics

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Experimental program
Comparison scheme
Effect test

Embodiment 2

[0054] Utilize the detection system of embodiment one, the method for obtaining foam layer feature is:

[0055] The impedance value of the slurry phase and the foam layer of the floating coal preparation is sampled at intervals by a reactance spectrum analyzer, and the relative impedance Z of the foam layer is obtained by calculating the ratio of the impedance value of the foam layer to the slurry phase of the concentrate r , and draw the relative impedance phase statistical analysis diagram.

[0056] Quantify the stability of the foam layer S by calculating the ratio of the standard deviation to the mean R :

[0057]

[0058] where μ is the average value of the foam layer impedance, x i is the measured value of the i-th foam layer impedance.

[0059] Sampling and ash analysis of flotation coal concentrate can be obtained R The higher the value, the lower the foam stability.

[0060] Under the normal conditions of adding foaming agent, S R In the range of 8% to 12%, t...

Embodiment 3

[0062] Furthermore, the method of online evaluation and regulation of the flotation coal preparation process based on the characteristics of the foam layer is as follows:

[0063] The relative impedance of the froth layer is related to the solid content and water content in the froth layer, that is, the lower the relative impedance, the higher the solid content and water content in the froth phase, and the better the flotation concentrate recovery. In view of the correlation between the relative impedance value of the foam layer and the flotation performance, in terms of the separation efficiency of the flotation process, the flotation performance can be evaluated and the process control optimized by calculating the foam layer stability and other parameters, including the following steps:

[0064] Step 1, collect the feed flow rate, feed solid content, foaming agent dosage, capture agent dosage, bubble layer depth and aeration rate of the flotation coal preparation process, and...

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Abstract

The invention discloses a method for evaluating the flotation coal preparation process based on the characteristics of the foam layer, according to the relative impedance and stability of the foam layer in the flotation coal preparation, and in combination with the feed flow rate, feed solid content, The amount of foaming agent, the amount of catching agent, the depth of the bubble layer and the gas filling rate can realize the rapid analysis of the abnormal operation of the flotation coal preparation process and evaluate the control performance of the flotation coal preparation process.

Description

technical field [0001] The invention belongs to the technical field of flotation coal preparation, and in particular relates to a method for online evaluation and regulation of a flotation coal preparation process based on foam layer characteristics. Background technique [0002] Flotation coal preparation is a complex physical and chemical process, and many relevant process parameters cooperate with each other to achieve satisfactory results. In the traditional flotation coal preparation process control system, it is difficult to control all the process parameters. Only according to the characteristics of the flotation process system and equipment in my country, the concentration, flow rate, chemical dosage of the incoming flotation pulp, the liquid level of the flotation machine, the flotation If parameters such as feedstock, clean coal and tailings ash are controlled, the product quality of flotation coal preparation is difficult to guarantee, the yield is difficult to con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/02G01N27/02
CPCB03D1/02G01N27/02
Inventor 高鹏杨硕杨树朝李一鑫高俊梅张卫军蔡先锋史英祥王晓坤赵柳达王文静
Owner TIANDI (TANGSHAN) MINING TECH CO LTD