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Study on the foam behavior of amine reagents adsorbed at gas-liquid and gas-liquid-solid interfaces

Shang Kaixuan, Xie Weimin, He Dongsheng, Benzaazoua Mostafa, Chen Fei, Aleksandrova Tatiana N.

Physicochemical Problems of Mineral Processing

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2021

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Vol. 57, iss. 1

192--205

EN

Alkyl amines are widely used as cationic collectors in flotation. In this work, the flotation foaming behaviors of alkyl amines, including dodecylamine (DDA), di-n-hexylamine (DHA), octadecylamine (ODA), oleylamine (OLA), in the presence or absence of quartz were investigated by a new approach, “foam analyzer”. The effects of pH, reagent dosage, concentration of quartz powder, and particle size on foaming property and stability of bubble were explored, and the physical model of foam structure evolution was established. The adsorption mechanism of amines on quartz surface was studied from molecular structure, surface tension, zeta potential, charging mode, and adsorption form. The results show the foam stability of four amine collectors as follows: OLA > ODA > DHA > DDA. In the range of pH=6-10, the foam properties of the four amines are better. Under the same conditions, the longer carbon chain of aliphatic amine, the more unsaturated bonds, the fewer hydrogen atoms of the amine group, and the corresponding foam properties are better. When the concentration of quartz powder is 8-10%, the foaming and stability of the foam of four kinds amines are the best, The finer quartz powder particle size, the more stable the amine foam and the stronger the foamability.

2

Comparative study of hybrid foam microstructure models

Szymczyk W., Miedzińska D.

Journal of KONES

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2010

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Vol. 17, No. 4

505-511

EN

Cellular solids are materials made out of solid strut or thin plate like structures bridged together. They occur in nature in the form of honeycombs, wood, bone, cork etc. These materials possess a unique combination of properties such as low thermal conductivitv, low density and high energy-absorption. Foams are a class of cellular solids, generally made by dispersing gas into a liquid material and then cooling it to solidify. They are categorized as open-cell and closed-cell foams. Depending on the solid materials that are made into foams, they are also categorized as polymeric foams, metallic foams, and ceramic foams. Due to developments in material science and manufacturing lechniques, advanced foams have found potential for use in automobile, aircraft, and space vehicle structures. In the paper the comparative study of the hybrid foam microstructures is presented. Hybrid foam is a new, still developed material that is built of the aluminum open cell foam matrix filled with other material (here: elastomer). The numerical models based on cubic geometry in different configurations are developed. The FE analysis of the compression test is curried out. The results are presented and analyzed due to the microstructure geometry influence on the material behaviour.

3

Recykling struktur spienionych z wyposażenia pojazdów.

Osiński J., Żach P.

Recykling

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2007

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nr 3

22-23

PL

Polska jest obecnie w trakcie tworzenia krajowego systemu recyklingu pojazdów wycofanych z eksploatacji. Dla dalszego rozwoju systemu ważne znaczenie ma skuteczne wdrożenie mechanizmów stworzonych przez ustawę wrakową.