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Phase separation phenomenon and mechanism in the preparation of cast stone from liquid slag from phosphorus smelting furnace

QIUYU ZHANG1, JUN ZHOU1,* , ZHU SHU1, TIANTIAN LI1, YANXIN WANG2

Affiliation

  1. Engineering Research Center of Nano Geomaterials of Ministry of Education & Faculty of Material Science and Chemistry, China University of Geosciences, 430074 Wuhan, P. R. China
  2. School of Environmental Studies, China University of Geosciences, 430074 Wuhan, P. R. China

Abstract

A novel approach of preparing cast stone directly from hot liquid phosphorus slag (PS) discharged from phosphorus smelting furnace had been proposed and tested in the previous work. In this paper, the phase separation behavior and phenomenon occur r ed during heat treat ing the precursor into cast stone products were systematically observed and analyzed by XRD, FESEM and EDAX techniques. Combining some classical theory of phase separation with the measur ed results, it can be deduced that, the phase separation is mainly governed by the mechanism of binodal decomposition, and the growth of the separated droplets primarily conforms to the theory of Ostwald ripening. This study contributes a theoretical foundation to the preparation of the PS cast stones..

Keywords

Phosphorus slag, Cast stone, Phase separation, Binodal decomposition, Ostwald ripening.

Citation

QIUYU ZHANG, JUN ZHOU, ZHU SHU, TIANTIAN LI, YANXIN WANG, Phase separation phenomenon and mechanism in the preparation of cast stone from liquid slag from phosphorus smelting furnace, Optoelectronics and Advanced Materials - Rapid Communications, 8, 3-4, March-April 2014, pp.300-305 (2014).

Submitted at: July 2, 2013

Accepted at: March 13, 2014