中南大学学报（自然科学版）2017，Vol.48Issue(11)：2843-2850,8.DOI:10.11817/j.issn.1672-7207.2017.11.001
烧结过程中碱金属脱除及在颗粒物中的富集行为
Behavior of alkali metal removal and enrichment in particles during sintering process
摘要
Abstract
Alkali balance in sintering process was investigated through analyzing the samples collected from the whole industrial process. Sinter pot tests were conducted to study the removal behaviors of K, Na and relevant influencing factors. The enrichment characteristics and occurrence states of K and Na in particles with different grain sizes were analyzed. The results show that the removal rates of K and Na are respectively 22.86% and 8.70% during the whole sintering process. Removed K and Na firstly go into the head ESP dust and then into the end ESP dust. Improving the ratio of fuel and basicity can increase the removal rates of K and Na. Additionally, the removal rates of K and Na are low in the upper layer and the lowest layer of the whole sintering bed, while the maximum removal rate is found in the middle-lower layer. K and Na go into particles along with gas flue. The content and enrichment ratios of K and Na in particles increase with the decrease of the particle size, and the enrichment ratios of K and Na reach 279.86 times and 43.17 times in the fourth electric field ash, and 248.77 times and 50.13 times in aerosol particle compared with those in raw materials. K and Na mostly exist in the form of chlorides in particles because they may form compounds with Cl element by vaporization- condensation.关键词
烧结/K/Na/脱除/赋存状态/富集特性Key words
sintering/potassium/sodium/removal/occurrence state/enrichment characteristics分类
矿业与冶金引用本文复制引用
范晓慧,何向宁,甘敏,周阳,季志云,李强..烧结过程中碱金属脱除及在颗粒物中的富集行为[J].中南大学学报（自然科学版）,2017,48(11):2843-2850,8.基金项目
国家自然科学基金重点资助项目(U1660206) （U1660206）
中南大学"创新驱动计划"项目(2015CX005) （2015CX005）
湖南省战略金属矿产资源清洁高效利用协同创新中心资助项目(2015) （2015）
国家重金属污染防治工程技术研究中心开放基金资助项目(2015CNERC-CTHMP-14) (Project(U1660206) supported by the National Natural Science Foundation of China （2015CNERC-CTHMP-14）
Project(2015CX005) supported by the Innovation Driven Plan of Central South University （2015CX005）
Project(2015) supported by the Co-Innovation Center for Clean and Efficient Utilization of Strategic Metal Mineral Resources of Hunan Province （2015）
Project(2015CNERC-CTHMP-14) supported by the Opening Foundation of the Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution) （2015CNERC-CTHMP-14）
