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| Study on FluorineBearing Iron Concentrate Pellets Added With Dolomite |
| XU Bin，XIONG Lin，YANG Yongbin，JIANG Tao，LI Qian，WANG Jiechao |
| College of Resources Processing and Bioengineering， Central South University, Changsha 410083, Hunan, China |
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Abstract The effect of MgO on the properties of fluorinebearing iron concentrate pellets was investigated. The results showed that the properties of greenball did not change evidently with the increasing of the content of MgO. When the content of MgO was increased from 0.83% to 2.0%, the compression strength of roasted pellets was increased evidently from 3555 to 5050 N per pellet. However, CO2 from dolomite decomposition increased porosity of pellets, reducing the compression strength of preheated pellets. The compression strength of roasted pellets and preheated pellets were improved by prolonging the preheating time. Most of the MgO existed in iron phase which made magnetic iron ore and magnesia crystal lattice stable at high roasting temperature, these minerals were interconnected, tightened by cementation and mutual eroded with calcium ferrite and Fe2O3, all of them could improve the compression strength of roasted pellets.
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Received: 01 January 1900
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2008, Vol. 43 
