关于锰球氮化的动力学模型及生产工艺探索  

DYNAMIC MODEL FOR NITRIDING MANGANESE PELLETS AND INVESTIGATION ON PRODUCTION

作　　者：刘勇 王晓非 高养侠 储少军[2] 朱翔鹰 陈佩仙[2] LIU Yong1, WANG Xiaofei1, GAO Yangxia1, CHU Shaojun2, ZHU Xiangying3, CHEN Peixian2(1. China Machinery International Engineering Design and Research Institute Co., Ltd., Changsha, 410007 China; 2. School of Metallurgical and Ecological Engineering, University of Science ＆ Technology, Beijing 100083, China; 3. Jiangsu Jiangnan Ferrolloy Co., Ltd., Changzhou 213119, Chin)

机构地区：[1]中机国际工程设计研究院有限责任公司,长沙中国410007 [2]北京科技大学冶金与生态工程学院,北京中国100083 [3]江苏江南铁合金有限公司,常州中国213119

出　　处：《铁合金》2018年第3期25-31,共7页Ferro-alloys

摘　　要：建立了锰球氮化的动力学模型,采用管式炉热重法对单个锰球进行了氮化,试验结果和模型能很好的吻合;此外还利用井式炉对氮化锰球的生产进行了初步探索,对井式炉氮化过程中炉料的温度进行了测量。结果表明,锰球氮化模型在实际生产中的应用关键在于氮气在锰球内部的扩散系数、局部化学反应速率常数、锰球半径等参数的确定;在井式炉生产过程中,由于锰和氮气之间的反应为剧烈的放热反应,反应放出的热量积聚,引起温度升高,可能产生烧结现象。A dynamic model of the nitriding manganese pellets had been established in this paper. Each manganese pellet had been nitrided separately by tube furnace thermogravimetry. The experimental result coincided with the model. In addition,manganese nitride pellets were preliminarily produced by pit furnace. The furnace temperature was measured during the nitriding process. The result indicated that,on one hand,the application of the model of the nitriding manganese pellets was determined by parameters including diffusion coefficient of nitrogen inside the pellets,partial chemical reaction rate constant,radius of the pellets,and among others. On the other hand,during the pit furnace production,as manganese and nitrogen are drastic exothermic reaction,the released heat accumulated and thus the increased temperature might lead to sintering phenomenon.

关 键 词：氮化锰 电解锰粉 锰球 氮化模型 

分 类 号：TF642[冶金工程—钢铁冶金]