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Wet metallurgy leaching process optimization method with interval uncertainty

An uncertain, hydrometallurgical technology, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve the problems that the mechanism model or data model cannot meet the production requirements of the hydrometallurgical leaching process, and achieve calculation speed Fast, precise results

Active Publication Date: 2018-11-30
NORTHEASTERN UNIV
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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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  • Wet metallurgy leaching process optimization method with interval uncertainty
  • Wet metallurgy leaching process optimization method with interval uncertainty
  • Wet metallurgy leaching process optimization method with interval uncertainty

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Effect test

Embodiment 1

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

[0104] The sp...

Embodiment 2

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

[0224] Step 2: The present invention combines and utilizes the respective advantages of SQP and DE, and proposes an improved DE-SQP hybrid optimization algorithm, which enhances its ability to solve complex hydrometallurgical industri...

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Abstract

The invention relates to a wet metallurgy leaching process optimization method with interval uncertainty. The ore pulp concentration is described by adopting an interval number; and according to the analysis on a reaction mechanism in a gold cyaniding leaching process, a mechanism model of the gold cyaniding leaching process is built by utilizing a material conservation equation and an interval analysis theory. On the basis of the mechanism model, an optimization model taking the maximum economic benefit of the two-stage gold cyaniding leaching process as a target and based on the interval number is built. For the uncertainty optimization model, a two-layer nested improved differential evolution and sequence quadratic programming hybrid optimization algorithm is adopted for performing solving. Finally the influence of the uncertainty level of the ore pulp concentration on the economic benefits of the leaching process is verified through simulation. The model can reflect actual situations of a production process more objectively compared with a traditional model; the adaptability of the model is improved; and therefore, the method has relatively good actual engineering significance.

Description

technical field [0001] The invention relates to a hydrometallurgical leaching process optimization method with interval uncertainty, belonging to the technical field of hydrometallurgy. Background technique [0002] With the gradual reduction of high-grade ore, the hydrometallurgical process has begun to be highly valued by countries all over the world. Compared with traditional pyrometallurgy, hydrometallurgy technology has the advantages of high efficiency, cleanliness, and is suitable for the recovery of low-grade complex metal mineral resources. Especially in view of the characteristics of my country's mineral resources, which are rich in lean ore, complex symbiosis, and high impurity content, the industrialization of hydrometallurgy is of great significance for improving the comprehensive utilization of mineral resources, reducing solid waste production, and reducing environmental pollution. [0003] Gold hydrometallurgical leaching process includes primary cyanide lea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06F17/50
CPCG06Q10/04G06F30/20
Inventor 牛大鹏王忠昂王福利
Owner NORTHEASTERN UNIV
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