An Optimal Method for Hydrometallurgical Leaching Process with Interval Uncertainty

An uncertain, hydrometallurgical technology, applied in the field of hydrometallurgy, can solve the problem that the mechanism model or data model cannot meet the production requirements of the hydrometallurgical leaching process, and achieve the effect of fast calculation speed and high precision

Active Publication Date: 2021-10-22
NORTHEASTERN UNIV LIAONING
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Problems solved by technology

Due to the uncertain factors in the industrial process, a single mechanism model or data model cannot meet the production requirements of the hydrometallurgical leaching process.

Method used

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  • An Optimal Method for Hydrometallurgical Leaching Process with Interval Uncertainty
  • An Optimal Method for Hydrometallurgical Leaching Process with Interval Uncertainty
  • An Optimal Method for Hydrometallurgical Leaching Process with Interval Uncertainty

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Effect test

Embodiment 1

[0103] The single-stage leaching process of hydrometallurgy such as figure 1 As shown, the leaching process consists of a primary leaching process and a secondary leaching process, both of which consist of four pneumatic continuous stirred tank reactors (CSTRs) connected in series. The pulp after sizing is pumped into the first leaching tank, and each tank is connected by overflow. In the first, second and fourth tanks, sodium cyanide, insoluble gold in the solid phase, and insoluble in the pulp are added. Dissolved oxygen reacts to form gold cyanide complex ions that are soluble in water. The ore pulp after the primary leaching is subjected to a vertical filter press for solid-liquid separation to obtain a filter cake and a filtrate. The uncertain filter cake amount and ore gold grade are put into the sizing tank, and the ore pulp after sizing enters the four leaching tanks in the secondary leaching process in turn, and the same chemical reaction occurs.

[0104] The specif...

Embodiment 2

[0223] Step 1: Aiming at the uncertainty of two slurry concentrations in the hydrometallurgical leaching process, the present invention proposes to use interval numbers to describe the slurry concentration, and the first leaching slurry concentration C w1 and the second leaching pulp concentration C w2 It is divided into five states: NB (negative large), NS (negative medium), ZE (zero), PS (positive medium), and PB (positive large). The pulp concentration C w1 and C w2 As the input condition of the mechanism model, the leaching rate of each stage and the total leaching rate are finally obtained. Then, the interval analysis theory was combined with the leaching process mechanism analysis to establish an optimization model of the gold cyanide leaching process based on interval uncertainty.

[0224] Step 2: The present invention proposes an improved DE-SQP hybrid optimization algorithm by combining the respective advantages of SQP and DE, which enhances its ability to solve co...

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Abstract

The present invention relates to a hydrometallurgical leaching process optimization method with interval uncertainty. The present invention uses interval numbers to describe the pulp concentration, and based on the analysis of the reaction mechanism of gold cyanidation leaching process, uses material conservation equation and interval analysis theory to establish gold A mechanistic model of the cyanide leaching process. On the basis of the mechanism model, an optimization model based on the interval number with the goal of maximizing the economic benefits of the two-stage gold cyanide leaching process was established. For the uncertainty optimization model of the present invention, a two-layer nested improved differential evolution and sequential quadratic programming hybrid optimization algorithm is used to solve it. Finally, the influence of the uncertainty level of pulp concentration on the economic benefits of the leaching process was verified by simulation, and the model can more objectively reflect the actual situation of the production process than the traditional model, which improves the adaptability of the model and has good engineering practical significance .

Description

technical field [0001] The invention relates to a hydrometallurgical leaching process optimization method with interval uncertainty, and belongs to the technical field of hydrometallurgy. Background technique [0002] With the gradual reduction of high-grade ores, the hydrometallurgical process has begun to be highly valued by countries around the world. Compared with traditional pyrometallurgy, hydrometallurgy technology has the advantages of high efficiency, cleanliness, and suitability for the recovery of low-grade complex metal mineral resources. Especially in view of the characteristics of my country's mineral resources with many lean ore, complex symbiosis and high impurity content, the industrialization of hydrometallurgical process is of great significance for improving the comprehensive utilization rate of mineral resources, reducing the output of solid waste and reducing environmental pollution. [0003] The gold hydrometallurgical leaching process includes primar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/04G06F30/27G06F111/04G06F111/06
CPCG06Q10/04G06F30/20
Inventor 牛大鹏王忠昂王福利
Owner NORTHEASTERN UNIV LIAONING
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