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2 Physicochemical Problems of Mineral Processing

2 2024

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Progress of microscopic interaction between fine particles in coal slurry water

Shang Huanhuan, Chen Jun, Ling Yunjia, Bao Longxiang, Min Fanfei

Physicochemical Problems of Mineral Processing

2024

Vol. 60, iss. 3

art. no. 189117

The interaction between fine particles is widespread in nature and plays a crucial role in regulating various interfaces for minerals. In coal preparation wastewater treatment, the intricate mechanism of interaction between multi-component fine particles in coal slurry water (denoted as CSW) is a fundamental aspect in addressing the challenges of coal slurry water agglomeration, selective separation, and difficult dewatering. This paper presents a summary of the necessity, current research status, and progress in studying the microscopic interaction between mineral particles in CSW systems. It overviews theoretical calculation formulas for particle-particle interaction, factors that influence such interaction, and modern analysis techniques for studying microscopic particle interaction. These findings enhance and refine relevant theories, establish a theoretical foundation, and offer technical support for stabilizing and optimizing the performance of CSW systems. Additionally, it elucidates the mechanism of particle-particle interaction in CSW, which is of significant importance in achieving efficient separation of CSW.

Hydrophobic regulation enhances the filtration and dehydration for coal preparation products, an experimental exploration

Wang Tianyue, Chen Jun, Shang Huanhuan, Bao Longxiang, Yu Guoqiang, Tian Jun

Physicochemical Problems of Mineral Processing

2024

Vol. 60, iss. 6

art. no. 194659

To enhance the filtration and dewatering performance while reducing the moisture content of coal preparation products, we conducted an investigation into the dehydration efficacy of various coal preparation products using different filter aids. The study involved examining the dehydration effects of both conventional filter aids and new filter aids on flotation cleaned coal and coarse fine slime at the Huaibei Linhuan coal preparation plant. Our findings revealed a significantly superior dehydration performance of the new filter aids compared to conventional hydrophobic ones. Subsequently, we explored the dehydration efficacy of a specific new filter aid, designated as 1239, on four types of coal samples sourced from the Huainan mining area. The results demonstrated that filter aid 1239 exhibited remarkable effectiveness on both flotation cleaned coal and coarse fine slime, with a discernible impact on coal slime as well. By modulating the hydrophobicity of particle surfaces, hydrophobic filter aids effectively facilitated the dehydration of coal preparation products. These findings bear substantial significance for improving the dewatering and transportation processes of coal preparation products.