Regular Article

Nitriding of manganese pellet

¹ School of Metallurgy, Northeastern University, 110819 Shenyang, PR China
² Jiangsu Jiangnan Ferroalloy Co., Ltd., 213119 Changzhou, PR China
³ School of Resource and Materials, Northeastern University at Qinhuangdao, 066004 Qinhuangdao, PR China
⁴ State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, 100083 Beijing, PR China

^* e-mail: 5197618@qq.com

Received: 23 January 2017
Received in final form: 17 May 2017
Accepted: 28 July 2017

Abstract

The nitriding process of manganese pellet was studied in the present study in the temperature and nitrogen pressure ranges of 700 to 950 °C, and 0.2–0.6 MPa, respectively. From 700 to 850 °C, increasing temperature is beneficial for enhancing nitrogen content; while from 850 to 950 °C, there is no obvious difference among nitrogen content of different samples at different temperatures, since the sintering of manganese particles in pellet at high temperatures may happen which retards the nitriding process. By studying the influence of nitrogen pressure, it was found that a larger nitriding rate will be obtained in a high nitrogen pressure. After reacting at the high temperature for a certain time, it was found that a low cooling rate has significant effect on increasing the nitrogen content to a certain extent.