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A kind of column-type rake-free paste thickener early-warning anti-blocking method

A paste thickener and thickener technology, applied in separation methods, chemical instruments and methods, mechanical material recovery, etc., can solve the problem that the underflow concentration of the thickener cannot be monitored in real time and high-concentration early warning, which affects the stability and continuity of on-site production , time-consuming and labor-intensive problems, to achieve the effect of avoiding excessive dilution, low cost and strong operability

Active Publication Date: 2022-07-12
SHANDONG UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is time-consuming, labor-intensive and non-prospective. Problems are often found only after the thickener is blocked, which seriously affects the stability and continuity of on-site production. The main reason is that the underflow concentration of the thickener cannot be monitored in real time and high-concentration early warning

Method used

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  • A kind of column-type rake-free paste thickener early-warning anti-blocking method
  • A kind of column-type rake-free paste thickener early-warning anti-blocking method
  • A kind of column-type rake-free paste thickener early-warning anti-blocking method

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specific Embodiment approach

[0134] A concentrator needs to concentrate the fine-grained tailings after classification, and the tailings are concentrated to fill the underground consolidation body. The specific implementation is as follows:

[0135] (1) Establish the relationship equation between fine-grained tailings slurry concentration, yield stress and viscosity

[0136] Based on the determination of viscosity and yield stress of fine tailings slurry with different concentrations, the relationship equations of concentration-viscosity and concentration-yield stress were fitted respectively. Table 1 shows the corresponding relationship between fine tailings slurry concentration and viscosity and yield stress.

[0137] Table 1

[0138] concentration / % Viscosity / Pa·S Yield stress / Pa 52 30.63 0.04 54 42.27 0.06 56 53.61 0.14 58 66.2 0.26 60 81.11 0.48 62 94.39 0.94

[0139] (2) The vertical height difference between the ground filling hole and the wo...

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Abstract

The invention discloses an early-warning anti-blocking method for a column-type rakeless paste thickener, comprising the following steps: (1) determining the upper limit value of the slurry conveying concentration; (2) collecting the pressure values ​​at the lower end and the upper end of the thickener discharge well ; (3) Establish the relationship between the pressure gauge difference and the slurry concentration in the thickener discharge well; (4) Real-time monitoring and early warning type anti-blocking of the thickener underflow concentration; Each high-pressure water pressure pipeline is provided with an electric control valve, and the electric control valve is connected with the PLC control device; the pressure value measured by the first pressure gauge and the second pressure gauge is converted to obtain the real-time information of the slurry in the discharge well of the thickener. Concentration C x ;The PLC control device compares the pulp concentration C x with the set upper limit of concentration C 上 , to determine whether to issue an early warning or output a signal for the opening and closing of the high-pressure water valve. The present invention can realize real-time monitoring of the concentration of the thickener discharge, has strong operability, and can effectively avoid blockage.

Description

technical field [0001] The invention relates to the field of thickener blocking prevention, in particular to a column-type rake-free paste thickener early-warning blocking blocking method suitable for the concentration of low-concentration fine-grained tailings. Background technique [0002] Thickener is one of the most commonly used tailings concentration and dewatering equipment in mines, and it is an important guarantee for ensuring the utilization of backwater in the processing plant and the safe and efficient disposal of tailings. As we all know, the height-diameter ratio and bottom cone angle of traditional rake thickeners are small, and the rake frame plays a vital role in the smooth discharge of the underflow, but when the underflow concentration of the thickener is too high, "pressure rake" often occurs. The phenomenon has a serious impact on the production of enterprises. In order to overcome the above problems, the industry relies on measures such as improving th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D21/02B01D21/30
CPCB01D21/02B01D21/30Y02W30/52
Inventor 王俊祥吕宪俊李琳曹晓强
Owner SHANDONG UNIV OF SCI & TECH
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