|
|||||
|
|
| 高压辊磨预处理强化巴西镜铁矿球团 | |
| 引用本文： | 朱德庆,唐艳云,Vinicius Mendes,潘建,翟勇. 高压辊磨预处理强化巴西镜铁矿球团[J]. 北京科技大学学报, 2009, 31(1) |
| 作者姓名： | 朱德庆 唐艳云 Vinicius Mendes 潘建 翟勇 |
| 作者单位： | 1. 中南大学资源加工与生物工程学院,长沙,410083 2. 巴西,Vale,巴西 |
| 摘 要： | 采用高压辊磨技术预处理镜铁矿,对强化其球团工艺及机理进行了研究.扫描电镜观测证实,通过优化高压辊磨闭路流程的循环负荷,巴西镜铁矿的表面形状及比表面积得到改善,成球性得到明显提高.以70%镜铁矿配加30%磁铁矿为原料,采用71%高压辊磨产品返回方式处理后,在添加2.4%的膨润土、造球时间15 min及造球水分8%的条件下,生球各指标与同配比未经高压辊磨处理的相比均有大幅度提高,其0.5 m落下强度达到4.5次,单球抗压强度10.25 N,爆裂温度455℃;生球在预热温度1 050℃、预热时间10 min,焙烧温度1 280℃、焙烧时间12 min的条件下焙烧,成品球单球抗压强度达到2 690.88 N,满足球团生产的要求. |
| 关 键 词： | 高压辊磨 镜铁矿 磁铁矿 球团 |
Improvement in pelletization of Brazilian specularite by high-pressure roller grinding |
|
| ZHU De-qing,TANG Yan-yun,Vinicius Mendes,PAN Jian,ZHAI Yong. Improvement in pelletization of Brazilian specularite by high-pressure roller grinding[J]. Journal of University of Science and Technology Beijing, 2009, 31(1) | |
| Authors: | ZHU De-qing TANG Yan-yun Vinicius Mendes PAN Jian ZHAI Yong |
| Abstract: | The processing and mechanism of the improvement in pelletization of Brazilian specularite by high-pressure roller grinding(HPRG) were investigated.SEM observations show that after being pretreated by HPRG in a closed flow path at an optimized cyclic loading,the specific surface area of Brazilian specularite increases greatly and its ballability is dramatically improved.The pellet feed composed of 70% specularite and 30% magnetite was pretreated by HPRG at 71%-product cyclic loading in a closed flow path,mix... |
| Keywords: | high-pressure roller grinding specularite magnetite pellets |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |