自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(自然科学版)

Journal of Central South University

第30卷    第1期    总第125期    1999年2月

[PDF全文下载]    [Flash在线阅读]

    

文章编号:(1999)01-26-5
两段烧结工艺中的Ⅰ段赤泥烧结
上官正;杨重愚

(中南工业大学有色冶金系)

摘 要: 研究了铝土矿两段烧结工艺的Ⅱ段烧结 及溶出的最佳操作条件,确定Ⅰ段赤泥在钙比为2:35,烧结温度为1120~1200℃时,氧化钠溶出率达92%左右,氧化铝溶出率达81%左右;当溶出液氧化铝质量浓度为40~80g/L时,Ⅱ段熟料溶出的二次反应很弱,溶出条件宽松.因此,两段烧结新工艺处理铝硅比为6的矿石,氧化钠总溶出率达 986%,氧化铝总溶出率达968%,碱的化学损失是每吨氧化铝损失碳酸钠18kg.

 

关键字: 烧结法;赤泥熟料;低铝硅比铝土矿;两段烧结;熟料溶出

SINTERING RED MUD FROM Ⅰ STAGE SINTERING IN TWO STAGE SINTERING PROCESS OF BAUXITE
Shangguan Zhen Yang Zhongyu

Department of Nonferrous Metallurgy, Central South University of Technology, Changsha, 410083, China

Abstract:In this paper, the optimum conditions for Ⅱ stage sintering and leaching its sinter in two stage sintering technology have been investigated. When the red mud from leaching Ⅰ stage sinter is sintered at 1120~1200 ℃ and /=2 35, the yields of Na 2O and Al 2O 3 are about 92% and 81% respectively. When the Al 2O 3 concentration in pregnant liquor after leaching Ⅱ stage sinter is 40~80 g/L, the secondary reaction in leaching is very weak. Thus, when bauxite with w (A)/ w (S)=6 is processed by two stage sintering technology, the final yields of Na 2O and Al 2O 3 are 98 6% and 96 8% respectively and the chemical loss of Na 2CO 3 is about 18 kg per ton Al 2O 3

 

Key words: sintering process; sinter made from red mud; bauxite with low A/S; sintering bauxite in two stages; leaching sinter

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号