Crystallization Properties of the Glass Ceramics Prepared from Iron-Rich Nickel Slag

Kongjin Zhou,Yulin Zhang,Qinglin Zhao

doi:10.13189/ujms.2017.050203

Abstract

For the purpose of broadening the scope of applications of nickel slag, this paper focuses on the crystallization properties of glass ceramics with large amounts of iron-rich nickel slag. In this research, the properties including activation energy of crystallization, crystalline growth pattern, main crystalline phase and micro structure were discussed. It was shown that when KNO 3 was added, the Fe 2+ oxidized to Fe 3+ , the activation energy of crystallization increased from 283.70 kJ/mol to 345.45 kJ/mol and the Avrami changed from 2.40 to 2.35. The main crystalline phase for both samples was pyroxene and it grew in one-dimension.

Highlights

Nickel slag is an industrial waste during the melting of nickel laterite. it occupies large amounts of land and affects our environment due to its lacking of proper application
The kinetics of the crystallization of iron-rich nickel slag glass ceramics was determined by DTA which was performed in a Netzch STA 449 thermoanalyser using 10.5±1mg powder samples with heating rates of 5, 10, 15 and 20oC/min from ambient temperature to 1200oC
The effective nucleating temperature was between Tg and Tg+50oC, in this study, the K and NK samples were heat treated to 700, 750 and 800oC for 30min for nucleation [7]

Summary

Introduction

Nickel slag is an industrial waste during the melting of nickel laterite. it occupies large amounts of land and affects our environment due to its lacking of proper application. Nickel slag is an industrial waste during the melting of nickel laterite. It occupies large amounts of land and affects our environment due to its lacking of proper application. In view of present studies on nickel slag, the utilization and additional value were very low. The technology with which glass ceramics can be prepared from the industrial wastes is very important to solve the environment problems caused by the industrial wastes and to sustain the development of the related industries. It is promising to prepare the glass ceramics from the industrial wastes. The study on preparing the glass ceramics with the industrial wastes has been made since 1960s, and some results were widely reported [1].

Experimental

Activation Energy and Growth Pattern

Crystalline Phase

Micro Structure

Conclusions