HSC Simulation of hydrometallurgical processes Arif T Aji

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HSC Simulation of hydrometallurgical processes Arif T. Aji & Antti P CHEM-E 6810 Filtration

HSC Simulation of hydrometallurgical processes Arif T. Aji & Antti P CHEM-E 6810 Filtration exercise

Filtration Arif T. Aji & Antti P CHEM-E 6810 Filtration exercise

Filtration Arif T. Aji & Antti P CHEM-E 6810 Filtration exercise

Filtration • • Filtration is any of various mechanical, physical or biological operations that

Filtration • • Filtration is any of various mechanical, physical or biological operations that separate solids from fluids (liquids or gases) by interposing a medium through which only the fluid can pass (Wikipedia) According to mineral processing concept, filtration is one method (the other two are thickening and drying) of dewatering or methods to dewatered concentrates or tailing in order to convert the pulps to a transportable state. In addition, the water can be recycled into the existing water circuits of the processing plant, greatly reducing the demand for expensive fresh water • So, its all about solid-liquid separation 26. 2. 2021 3

General Role of Filtration in Hydrometallurgy • • Filtration increases post leaching process efficiency

General Role of Filtration in Hydrometallurgy • • Filtration increases post leaching process efficiency by reducing the amount of materials for the next process. Some examples found in gold processing: – Ore Fire Creek mine in Nevada, USA is the highest grade underground gold mine in the world with gold content of 44. 1 g/t (mining. com) – WEEE Typical mobile phones contain 350 g/t of gold (Hageluken, 2006) while PC boards contain only 86 g/t (Yazici, 2010) 26. 2. 2021 4

Filtration in concept • • Three materials in filtration 1. Pulp/ slurry/ concentrate A

Filtration in concept • • Three materials in filtration 1. Pulp/ slurry/ concentrate A mixture of solid and liquid, with common solid content of 10 -30% 2. Filtrate Liquid that passed through the filter 3. Cake or solid residue Accumulated solids, usually still contain 2030% of moisture Clean water can also be introduced to clean the Residue further 26. 2. 2021 5

Filtration Model in HSC Drawing 1. Select filter icon/ draw empty hydro reactor 2.

Filtration Model in HSC Drawing 1. Select filter icon/ draw empty hydro reactor 2. Draw streams consist of 2 input streams (slurry and wash water in) and 3 output streams (filtrate, residue and wash water out) 3. Name the streams 26. 2. 2021 6

Filtration Model in HSC Modelling 4. Right click to icon and select filter and

Filtration Model in HSC Modelling 4. Right click to icon and select filter and click ok 5. Select the stream created according to the HSC definition 26. 2. 2021 7

Variable List Editor and Distribution Create Variable List Editor 4. Add species in the

Variable List Editor and Distribution Create Variable List Editor 4. Add species in the related phases 5. Control the distribution a. Water phase to filtrate b. Pure phase to residue 6. Save and run the model 26. 2. 2021 8