| 内配碳红土镍矿球团制备工艺 |
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| 引用本文： | 毛瑞, 张建良, 黄冬华, 姜喆, 孙辉. 内配碳红土镍矿球团制备工艺[J]. 工程科学学报, 2013, 35(7): 862-868. DOI: 10.13374/j.issn1001-053x.2013.07.014 |
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| 作者姓名： | 毛瑞 张建良 黄冬华 姜喆 孙辉 |
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| 作者单位： | 1. 北京科技大学钢铁冶金新技术国家重点实验室, 北京 100083; |
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| 摘 要： | 以红土镍矿作为原料,煤粉作为还原剂,氧化钙作为熔剂,配加一定量的黏结剂和水,经对辊压球机压制成含碳球团.对红土镍矿的成球特性进行了研究,考察了还原剂、水分和黏结剂等因素对球团强度的影响.结果表明:红土矿粉本身具有较好的成球特性,在不加入黏结剂的条件下,球团仍具有一定的强度;较细粒度的煤粉会降低球团的强度,适宜含量的较粗粒度的煤粉能提高球团的强度;随着水分加入量的提高,球团的抗压强度逐渐提高,当水的质量分数为18%时,其抗压强度达到最大值,若水分继续增加,抗压强度呈现下降的趋势;球团的落下强度随着水量的增加而升高;随着膨润土用量的增加,球团强度有明显的提高,当膨润土的质量分数为2%时球团强度达到最大值,随着膨润土用量的进一步提高,球团强度略微下降,且膨润土中含有较高含量的SiO2和Al2O3,会降低球团有用元素的品位,因此用量不宜过高.
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| 关 键 词： | 红土镍矿 球团 直接还原 抗压强度 |
| 收稿时间： | 2012-04-12 |
Preparation process of carbon-containing pellets with laterite nickel ore |
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| MAO Rui, ZHANG Jian-liang, HUANG Dong-hua, JIANG Zhe, SUN Hui. Preparation process of carbon-containing pellets with laterite nickel ore[J]. Chinese Journal of Engineering, 2013, 35(7): 862-868. DOI: 10.13374/j.issn1001-053x.2013.07.014 |
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| Authors: | MAO Rui ZHANG Jian-liang HUANG Dong-hua JIANG Zhe SUN Hui |
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| Affiliation: | 1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;2. Journals Publishing Centre, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | Laterite nickel ore as raw materials, pulverized coal as a reductant, CaO as a flux, binder and water were pressed into carbon-containing pellets by using a twin-roller ball press. The pelletizing characteristic of laterite nickel ore was studied and the effects of some factors such as the reductant, water amount and binder on the pellet strength were investigated. It is shown that laterite nickel ore has a better pelletizing property and the pellets still have a certain strength without adding any binder. Fine-grained coal reduces the pellet strength but an appropriate content of coarse-grained coal can improve it. The compressive strength of the pellets gradually increases with the water addition amount increasing and reaches the maximum when the water addition amount comes up to 18%; however, if the water addition amount continues to increase, the compressive strength shows a decreasing tendency. The falling strength of the pellets gradually increases with the increase of water addition amount. When the bentonite addition amount increases the pellet strength gradually increases and reaches the maximum at the bentonite addition amount of 2%; however, if the bentonite addition amount continues to increase, the pellet strength declines slightly. What is more, bentonite contains higher contents of SiO2 and Al203, which can reduce the grade of useful elements in the pellets, so the addition amount of bentonite should not be too high. |
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| Keywords: | laterite nickel ore ore pellets direct reduction process compressive strength |
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