Study on the Bauxite Slimes Engineering Characteristics of Pingguo Alumina Industry Company

Abstract:

To study the slimes engineering properties of Pingguo Alumina Industry Company bauxite tailings that accumulated under natural conditions, Site test and laboratory test are used. Test results show that the oxide of the bauxite are alumina, silicon dioxide, ferric oxide; the mineral composition are mainly kaolinite, hydrogarnet and hematite; the grain of the slimes are silt and clay with a small amount of sand; the microscopic structure of bauxite is "super impracticable structure"; the total pore volume is 0.441ml/g; the total pore surface area is 6.747m²/g; the specific surface area of the grain is 131.53m²/g; the main ion exchange is K⁺ and the exchange capacity is 0.26-0.32mg/g; the average coefficient of permeability is 3.05×10^-6cm/se; the average moisture content is 130.3%; the average limit of liquidity is 57.1%; the average coefficient of compressibility is 0.79; the avera-ge cohesion is 23kPa; the average internal friction angle is 10.2°, so the slimes is high liquid limit, high compression and low shear strength soil; the water holding capacity of the slimes is 79~93%; the slurry concentration which had stacked more than 18 months is 49.92%, so the slimes is slurry.

• Periodical: Applied Mechanics and Materials (Volumes 641-642)
• Pages: 441-446
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.641-642.441
• Online since: September 2014
• Authors: Ji Hua Wang, Chun Hong Zhao
• Keywords: Bauxite, Engineering Characteristics, Slimes

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