Wyniki wyszukiwania - BazTech

1

Flotation separation influenced by the rheological properties of diaspore-pyrite mixed pulp

Zhao Yongqing, Li Xianhai

Physicochemical Problems of Mineral Processing

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2023

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Vol. 59, iss. 6

art. no. 174305

EN

The effects of pyrite and diaspore with different particle sizes on the rheological properties of pulp with butyl xanthate added as a collector were studied, and the mechanism for rheological pyrite separation from diaspore by flotation was probed. The apparent viscosity of the diaspore pulp with different particle sizes was higher than that of pyrite, especially for -30 μm diaspore. Microfine diaspore was an important component affecting the apparent viscosity and yield stress of the diaspore-pyrite mixed pulp, and the pulp became a non-Newtonian fluid when the mass fraction of fine-grained diaspore in the mixed pulp was high. In this study, sodium hexametaphosphate (SHMP) was used to control the rheology of the mixed pulp and improve the pyrite flotation, and the S (sulfur) recovery rate first increased and then decreased with increasing SHMP concentration. The apparent viscosity of the pulp decreased by 3.01% and the S recovery rate increased by 34.83% when the amount of added SHMP was 0.05 mg/kg. The apparent viscosity with 0.50 mg/kg SHMP was 21.76% lower than that seen with the addition of 0.05 mg/kg SHMP, but the S recovery rate was also reduced by 14.94%. Further research showed that the increased SHMP concentration led to increases in the electronegativities of the particle surface and the repulsive force between particles, which prevented agglomeration of the particles, reduced the apparent viscosity and yield stress of the mixed pulp, promoted collisions between the pyrite particles and the bubbles, and reduced the resistance of the air bubbles to flotation.

2

Influence of stearic acid on the structure and rheological behavior of injection-molded ZTA suspensions

Lin C., Wang B., Cheng Y., Wang C.

Materials Science Poland

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2013

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Vol. 31, No. 1

36-42

EN

The zirconia-toughened-alumina (ZTA) composite powder was exposed to a prior ball milling treatment with a small amount of stearic acid (SA) before the traditional blending process. The effect of different amounts of stearic acid on surface properties of the powder, the particle size distribution of the powder, and the rheological properties of the suspension were systematically studied within the design of experiments. Fourier transformation infrared spectroscopy (FTIR) analysis was used to prove the chemical interaction between the stearic acid and the ZTA powder. The effects of SA content on the particle sizes and their distribution were carefully examined. Rheological properties such as viscosity, yield stress, and power law exponent of the suspensions were determined within a temperature range of 140-170 °C. The optimal content of SA to improve the properties of the suspensions was found to be 3 wt.%.

3

Synthesis and Stab Resistance of Shear Thickening Fluid (STF) Impregnated Glass Fabric Composites

Yu K., Cao H., Qian K., Jiang L., Li H.

Fibres & Textiles in Eastern Europe

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2012

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Vol. 20, no. 6A (95)

126--128

EN

A shear thickening fluid (STF) was prepared successfully and its rheological behavior was investigated. Glass fabrics were soaked in STF/ethanol solution to prepare STF-glass fabric composites. The morphologies of the STF-glass fabric composites were observed by SEM. Quasi-static stab-resistant tests were carried out on both the neat glass fabrics and STF-glass fabric composites using a knife based on the areal density. The corresponding puncture and strengthen mechanisms were also investigated.

PL

Przygotowano ciecz gęstniejącą pod wpływem ścinania (STF) i zbadano jej właściwości reologiczne. Tkaniny z włókien szklanych były nasycane roztworem STF/etanol dla przygotowania kompozytów. Morfologię kompozytów badano za pomocą skaningowej mikroskopii elektronowej. Prowadzono quasi-statyczne badania na przebicie na tkaninach szklanych nienasączonych oraz na opracowanych kompozytach za pomocą noża o specjalnie zaprojektowanej konstrukcji. Niezależnie od testów porównawczych badano również mechanizm przebicia.

4

Wpływ czasu na parametry reologiczne wybranych zawiesin ceramicznych

Gliniak A., Izak P.

Szkło i Ceramika

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2001

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R. 52, nr 5

28-32

PL

W artykule przedstawiono wyniki badań nad "starzeniem się" upłynnionych zawiesin ceramicznych. Zawiesiny sporządzono na bazie kaolinu "KOC", "Sedlec" oraz bentonitu "Milowice" i modyfikowano powszechnie używanymi upłynniaczami. W okresie 28 dni ustalono kinetykę zmian podstawowych parametrów reologicznych.

EN

"Ageing" is still not well known, rheological property of ceramic slurries. It plays, however, very important role in industrial processes. In this article of rheological behaviours modyfied ceramic suspensions in the terms 28 days has been presented. The suspensions prepared in the base kaolin "KOC", "Sedlec" and bentonit "Milowice" and modyfied common use dispersants.