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Rare-earth cascade extraction separation component content soft measuring method

A component content and soft measurement technology, which is applied in the direction of analyzing materials, special data processing applications, instruments, etc., can solve problems such as easy to produce defective products, waste products, time-consuming, difficult to realize automatic control of the production process, etc., to ensure product quality , Optimize the effect of the process

Inactive Publication Date: 2005-10-26
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Off-line inspection, including on-site inspection, takes a long time, it is difficult to realize the automatic control of the production process, and it is easy to produce defective products and waste products
Although on-line detection methods are currently proposed: X-ray fluorescence spectrum analysis; ultraviolet-visible light photometry analysis; isotope-excited X-ray spectrum analysis and other methods, but the functions of the devices implementing these methods are not perfect, and cannot fully meet the continuous on-line detection of the rare earth extraction and separation production process. However, the industrial production practice of cascade extraction and separation of rare earths has not been widely used so far

Method used

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  • Rare-earth cascade extraction separation component content soft measuring method
  • Rare-earth cascade extraction separation component content soft measuring method
  • Rare-earth cascade extraction separation component content soft measuring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] In the extraction of lanthanum (La 2 o 3 ) implement the soft sensing method on the production line.

[0078] First of all, considering the rare earth extraction production, the operator is concerned about the change of the so-called sensitive point or the content of the element component of the important level, because the change of the purity at this point can reflect the future change law of the element component of the export. According to the analysis, in the 54-stage cascade extraction and separation process of the rare earth workshop, the change of the element composition content in the 20th stage is relatively sensitive, so the 20th stage of the extraction section is selected as the monitoring point level, and the means of offline detection and analysis is adopted. , through the comparative analysis of the change trend of the monitoring point-level element lanthanum (La) with the distribution of the imported feed liquid to adjust the control flow of organic ext...

Embodiment 2

[0104] When extracting cerium (CeO 2 ) on the production line to implement the present invention.

[0105] Same as the above-mentioned embodiment 1, first analyze the conditions of each part of the production line, select a suitable monitoring point, and then use the monitoring point as the object of analysis and data collection to establish a soft sensor model.

[0106] The first step: make monitoring point level and feed level CeO by off-line detection 2 The change trend of the percentage content and the establishment of the soft sensor experience model, the change trend is as follows Figure 6 shown.

[0107] Depend on Figure 6 It can be seen that, except for individual interference jump points, the element CeO at the monitoring point 2 The change trend of the component content is basically the same as that of the feed grade, and the change rule described by the curve can be expressed by the following function formula:

[0108] x 2，mid =f(U,ω) x 2，in

[0109] where...

Embodiment 3

[0130] Praseodymium (Pr 6 o 11 ) is a soft measure of the content of the extracted and separated components.

[0131] Similar to the above two embodiments, a suitable monitoring point is selected first, and the monitoring point is analyzed and data is collected.

[0132] The first step: make the monitoring point level with the feed level Pr through off-line detection 6 o 11 The change trend of the percentage content and the establishment of the soft sensor experience model, the change trend is as follows Figure 8 shown.

[0133] It can also be seen that, except for individual interference jump points, the element Pr at the monitoring point 6 o 11 The change trend of the component content is basically the same as that of the feed grade, and the change rule is expressed by the following functional formula:

[0134] x 3，mid =f(U,ω) x 3，in

[0135] where x 3，mid 、x 3，in Respectively represent the component percentage content of the element praseodymium in the monitori...

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Abstract

The invention provides a software-based measuring method for the content of elements obtained by rare-earth cascaded extraction separation, including the steps of data collecting and preprocessing, building software-based measuring model and correcting model, etc., and characterized in: as building the software measuring model, classifying the filtered sample data by subtraction clustering algorithm; finding model parameters by genetic algorithm to obtain a forecasting model of the content of elements. The invention also provides a software-based system for implementing the soft measuring method, comprising main program module, algorithm module, database and four interfaces and using the model station computer of an intelligent control system for rare-earth cascaded extraction separation as a hardware platform. The software-based measuring method makes data collection, pretreatment and modeling on extraction production of the elements La, Ce and Pr and the forecasting of the content of elements in the products shows that the results are all within the preset error range; and the forecasting of the content of elements is successfully made on the Yi production line by the software-based measuring model.

Description

technical field [0001] The invention belongs to the extraction of rare earth metals, in particular to the technical field of extracting and separating rare earths by using organic compound solvents, that is, it provides a method for performing soft measurement on the component content of rare earths during cascaded extraction and separation. Background technique [0002] The advancement of element content detection technology in the rare earth cascade extraction and separation production process is very important for ensuring the quality of rare earth products, improving metal recovery, reducing consumption, giving full play to the production capacity of equipment, and meeting various new processes and modern production management. important. With the improvement of rare earth extraction process level, the detection technology of rare earth extraction and separation process has also been developed rapidly. At present, the following methods are used for the detection of elem...

Claims

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Application Information

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IPC IPC(8): G06F17/00G06F19/00
Inventor 张肃宇贾文君柴天佑杨辉李健张福景
Owner NORTHEASTERN UNIV
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