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| Migration Behavior of Boron From Boron-Rich Slag in Carbothermic Reduction Process |
| LIU Ran,GAO Fu,WANG Xing-juan,L Qing |
| College of Metallurgy and Energy, Hebei United University, Tangshan 063009, Hebei, China |
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Abstract Based on thermodynamic analysis, the reduction and volatilization of boron in boron-rich slag were studied using carbothermal reduction method. Predominace diagram for the B-C-O system was presented. Phase composition and microstructure of products were determined by X-ray diffraction (XRD), and scanning electron microscopy. The experimental results show that the mass loss rate of boron in boron-rich slag increases with rising temperature, of which the maximum is 53.702% at 1470℃ for 8h. Boron has stabilized in the form of CaB2O4, affecting the volatilization of boron. The phase of reaction product is complex. Part of the volatilized matter and the volatilized magnesium/silicon form white powder, which deposit at the opening of furnace tube.
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Received: 02 April 2013
Published: 28 March 2014
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2014, Vol. 49 
