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| Improvement of Sintering Behaviors of Brazilian Specularite Concentrate by Damp Milling |
| ZHU Deqing,WANG Zhiyuan,PAN Jian,LI Jian,XU Xiaofeng |
| School of Mineral Process Engineering and Biology Engineering of Central South University, Changsha 410083, Hunan, China |
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Abstract One type of Brazilian specularite concentrate has poor granulation and sintering properties. However its surface characteristics and sintering capability can be improved through damp milling or mixing with limestone. The mechanism was revealed by measuring wetting heat, changing of size distribution and softening temperature , and so on. The effect of pretreatment was proven through sintering test. Results show that wetting heat of Brazilian specularite is improved resulting in better hydrophilicity and softening temperature of Brazilian specularite is reduced so that its high temperature reaction capability is increased. With pretreatment, the output and quality of sinter are improved greatly, with yield increased by 3.7%, tumbler index raised by 3.33%, solid fuel consumption decreased by about 4 kg/t and utilization rate increased by 22.4%, and sinter quality can meet the requirement of blast furnace operation.
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Received: 01 January 1900
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2007, Vol. 42 
