基于无碳烧结的褐铁矿型红土镍矿固结机理研究  

Research on consolidation mechanism of limonite-type laterite nickel ore based on carbon-free sintering

作　　者：刘佳文 陈铁军[1,2] 周仙霖 万军营[1,2] 师本敬 王兆才 LIU Jiawen;CHEN Tiejun;ZHOU Xianlin;WAN Junying;SHI Benjing;WANG Zhaocai(School of Resources and Environmental Engineering,Wuhan Univrsity of Science and Technology,Wuhan 430081,Hubei,China;Hubei Province Key Laboralory for Eficient Utiliation and Agglomeration of Metallurgic Mineral Resources,Wuhan 430081,Hubei,China;Zhongye Changtian International Engineering Co.,Ltd.,Changsha 410205,Hunan,China)

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081 [2]冶金矿产资源高效利用与造块湖北省重点试验室,湖北武汉430081 [3]中冶长天国际工程有限责任公司,湖南长沙410205

出　　处：《烧结球团》2022年第3期1-7,共7页Sintering and Pelletizing

基　　金：中冶长天基础研究基金资助项目(2020JCYJ06)。

摘　　要：为有效降低褐铁矿型红土镍矿烧结碳排放,促进其烧结矿中液相的形成,加强其烧结矿的结构强度,本文采用无碳烧结方法,并基于热力学分析,对该红土镍矿在无碳烧结环境下不同温度、碱度条件的烧结反应机理进行了研究。结果表明:无碳烧结温度对其液相生成量有显著影响;碱度的提高可促进FeO进一步熔解进入液相中,铁酸钙类矿物逐步上升,尖晶石类矿物逐渐减少;在碱度高于1.6时,无碳烧结矿随碱度的升高出现了更多的孔洞与裂缝;相同碱度条件下,无碳烧结能够生成足够多的主要液相组分(尖晶石类矿物),其烧结矿微观结构更加紧密。In order to effectively reduce the sintering carbon emission from the limonite-type laterite nickel ore, promote the formation of liquid phase in its sinter, and strengthen the structural strength of its sinter, the sintering reaction mechanism of this limonite-type nickel ore under different temperature and alkalinity conditions in a carbon-free sintering environment is investigated by using a carbon-free sintering method and based on thermodynamic analysis.The results show that: the temperature of carbon-free sintering has a significant effect on its liquid phase production;the increase of alkalinity can promote the further melting of FeOinto the liquid phase, and the calcium ferrite minerals gradually rise and the spinel minerals gradually decrease;at the alkalinity higher than 1.6,more voids and cracks appear in the carbon-free sinter with the increase of alkalinity;under the same alkalinity condition, the carbon-free sintering could generate with enough main liquid components spinel-like minerals and more compact sinter microstructure.

关 键 词：无碳烧结 褐铁矿型红土镍矿 热力学分析 固结机理 

分 类 号：TF046.4[冶金工程—冶金物理化学]