中南大学学报（自然科学版）2016，Vol.47Issue(6)：1823-1829,7.DOI:10.11817/j.issn.1672-7207.2016.06.001
MgO来源对磁铁精矿球团预热行为的影响
Influence of MgO sources on behavior of preheated pellets of magnetite concentrate
摘要
Abstract
Three different kinds of pellets(general magnetite pellets, magnetite with high MgO content pellets and magnetite pellets added MgO powder) were studied to investigate the influence of MgO sources on the behavior of preheated pellets. The results show that the compressive strength of preheated pellets reduces with the increase of the mass fraction of MgO at different preheated temperatures varing from 850 ℃ to 1 000 ℃. The common preheated magnetite pellets have the maximal compressive strength under the same preheating condition. The MgO existing in isomorphism or adscitious MgO powder can both decrease the compressive strength of preheated pellet, and the strength of pellets added with adscitious MgO powder is minimum. The oxidation of pellets made from magnetite with high MgO mass fraction is difficult, and preheated pellets present the double layer structure. Only a small amount of adscititious MgO powder mineralizes during the preheating stage. The unmineralized MgO powder remains in the hematite grains, which will affect the connections of new hematite grains and the growth of grains, and leads to the low compressive strength of preheated pellets finally.关键词
MgO/磁铁矿/预热球团/抗压强度Key words
MgO/magnetite/preheated pellets/compressive strength分类
矿业与冶金引用本文复制引用
潘建,于鸿宾,朱德庆,春铁军..MgO来源对磁铁精矿球团预热行为的影响[J].中南大学学报（自然科学版）,2016,47(6):1823-1829,7.基金项目
国家科技部火炬计划项目(2011GH561685)；国家自然科学基金资助项目(51474161)(Project(2011GH561685) supported by the Torch Plan of the Ministry of Science and Technology （2011GH561685）
Project(51474161) supported by the National Natural Science Foundation of China) （51474161）
