摘要
通过对活性炭、石墨粉和焦炭的比表面积、孔径分布和孔体积这类物性常数的分析测定,对3种碳源单独或混合作为还原剂的还原效果进行了相关讨论。结果表明,当3种碳源在1300℃单独熔融还原磷矿时,还原率均较低;将碳源两两按比例混合或者3个碳源按比例混合之后,还原率普遍有所提高,其中按照20%活性炭和80%石墨粉,40%石墨粉、12%活性炭和48%焦炭等配比混合时,对磷矿还原率的提高幅度较大,还原率可以达到95%以上;另一方面,针对少数配比下的反常情况做了分析阐述。本文也用XRD和SEM研究了相关机理。
The assay and determination of physicochemical con- stants, such as specific surface area, pore size distribution and pore volume for active carbon, graphite and coke were made and the effect with 3 kinds of carbon sources as reductant individually and in mixture was discussed. The results showed that the reduction ratio is very low when smelting reduction is made individually for the 3 kinds of carbon sources at 1300 ＂C and however, the reduc- tion ratio has some improvements generally when 2 or 3 carbon sources are mixed in proportion. The phosphate rock reduction rate is increased significantly to over 95% with blending in pro- portion of 20% active carbon, 40%graphite, 12% active carbon and 48% coke. In addition, abnormal conditions in a few cases are expounded and the relevant mechanism for XRD and SEM is analyzed.
出处
《化工矿物与加工》
CAS
北大核心
2016年第1期19-22,26,共5页
Industrial Minerals & Processing
基金
"十二五"国家科技支撑计划项目"低品位难处理磷矿高效绿色开发及综合利用技术研究与示范"(2013BAB07B01)
