Quick Search:       Advanced Search
戎万,操齐高,党蕊,赵盘巢,陈昆昆,张卜升,孟晗琪.喷雾干燥制备仲钼酸铵微球及其煅烧还原过程研究[J].稀有金属材料与工程(英文),2020,49(11):3962~3968.[Rong Wan,Cao Qigao,Dang Rui,Zhao Panchao,Chen Kunkun,Zhang Bosheng and Meng Hanqi.Study on the preparation of ammonium paramolybdate microspheres by spray drying and their calcination reduction process[J].Rare Metal Materials and Engineering,2020,49(11):3962~3968.]
Study on the preparation of ammonium paramolybdate microspheres by spray drying and their calcination reduction process
Download Pdf  View/Add Comment  Download reader
Received:December 05, 2019  Revised:January 06, 2020
DOI:
Key words: Ammonium paramolybdate  spray dried  hollow sphere  molybdenum powder
Foundation item:稀贵金属综合利用新技术国家重点实验室开放课题资助(SKL-SPM-2018011);陕西省青年科技新星项目(2018KJXX-055)
Author NameAffiliation
Rong Wan,Cao Qigao,Dang Rui,Zhao Panchao,Chen Kunkun,Zhang Bosheng and Meng Hanqi  
Hits: 47
Download times: 0
Abstract:
      In this paper, hollow ammonium paramolybdate precursor microspheres were prepared from ammonium paramolybdate solution by spray drying, and they were calcined and reduced to square or spherical molybdenum. It was characterized that the morphology of the ammonium paramolybdate precursor microspheres, and the morphology and composition were studied after calcination and reduction of ammonium paramolybdate precursor microspheres. The effects of reduction temperature, heating process and atmosphere on the reduction of ammonium paramolybdate precursor microspheres were also investigated. Consequently, as the concentratione of solution increase, the particle size range of microspheres become bigger, pits in the surface increase, and the agglomeration phenomenon becomes more obvious; with the increase of feed rate, the particle size range of microspheres decreased a little, and pits in the surface decrease; with the increase of spray drying temperature, the particle size range first increase and then decrease, while pits in the surface increase evidently; at the temperature of 800℃,the square or near spherical molybdenum can be obtained by hydrogen-argon mixer reduction, while the spherical molybdenum can be obtained by pure hydrogen reduction.