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2 results on '"turbiscan stability index (tsi)"'

1. Effect of concentrated brine on coal slurry stability and sedimentation

Author

Xu Hongxiang, Wang Jingzheng, Ning Kejia, Xia Tian, Li Meiyu, and Qin Qizheng

Subjects
coal slurry water, concentrated brine, sedimentation, turbiscan stability index (tsi), Engineering geology. Rock mechanics. Soil mechanics. Underground construction, TA703-712, Mining engineering. Metallurgy, TN1-997
Abstract

In order to solve the problem of comprehensive utilization of concentrated brine in coal chemical industry, the flocculating settlement test was carried out by using concentrated brine instead of coagulant in coal chemical industry, and the effect of pH and gangue content on concentrated brine was investigated. In this paper, the Turbiscan Lab stability analyzer is used to analyze the stability of coal slurry system with different concentration of concentrated brine. The sedimentation rate and supernatant turbidity of coal slurry are analyzed by image analysis method. The results show that the gangue minerals in this coal sample are mainly kaolinite and quartz, and the clay minerals are mostly kaolinite. The coal chemical concentrated brine is used as a coagulant.With the increase of its dosage, the stability of slime water first becomes weak and then stronger, and the settlement effect is the best when the stability is the worst. However, the addition of excessive brine will introduce too many cations, which will lead to the stabilization of slime water. The higher the waste rock content, the more difficult the coal slurry to settle. The coal slurry settlement effect gets better and then worse with the decreasing of pH value. The optimum settlement condition is pH=5.

Published
2020
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2. Inter-Correlation among the Hydrophilic–Lipophilic Balance, Surfactant System, Viscosity, Particle Size, and Stability of Candelilla Wax-Based Dispersions

Author

Lindner, Martina, Bäumler, Magdalena, Stäbler, Andreas, and Publica

Subjects
emulsifiying stability index (ESI), lcsh:TA1-2040, Turbiscan stability index (TSI), suspension, melt dispersion, hydrophilic–lipophilic balance (HLB), particle size distribution, Turbiscan, lcsh:Engineering (General). Civil engineering (General)
Abstract

Owing to a decrease in mineral oil resources, it is crucial to develop packaging materials based on renewable resources. Hence, a water vapor-barrier coating is developed as a natural wax-based dispersion. This dispersion should be stable over the storage time. In this study, the physical stability of a wax-based melt dispersion was analyzed (24 h and 21 days after production), and instability phenomena such as agglomeration, coalescence, and flotation were identified. Furthermore, the inter-correlations among the particle size, viscosity of the continuous phase, physical stability, surfactant chemistry, and hydrophilic&ndash, lipophilic balance value were characterized. Particle sizes were described by volume/surface mean d3,2, volume moment mean d4,3, and number mean d1,0 diameter, as well as the span of the volume and number distribution. Stability was characterized by the flotation rate, emulsion stability index, and Turbiscan stability index. Coalescence and agglomeration were not observed after the solidification of the wax particles. A significant correlation was observed for the emulsion stability index, with d3,2, and for flotation rate, with d1,0, d4,3, and viscosity as well, with d1,0, d3,2. Surfactants with hydrophilic&ndash, lipophilic balance values of 11&ndash, 13.5 seem to be the most suitable for stabilizing candelilla wax-in-water suspensions. Particles were smaller, and wax suspensions were better stabilized using Tween 20 and Span 20, compared with Tween 80 and Span 80.

Published
2018

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