Abstract
As high-grade refractories raw material，kyanite is widely used and the market demand is increasingly greater. The kyanite in Hebei is complicated，main chemical composition is SiO252.87％、A120321.14％. The result of investigation on mineral processing technology show that desliming has a great influence on kyanite, especially acid process, the suitable lower limit particle size for desliming is 20μm. Magnetic separation process may remove iron-bearing minerals，and the iron removal rate is 87.78％．The optimum condition for magnetic separation is magnetic field conditions 1.0T. Base on the research, we can get concentrate with a grade of A120358.37% and a recovery of A120356.02% if we adopt magnetic separation and flotation technology.
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