Process Mineralogy of Refractory Hematite Ore in Kazakhstan
Systemic process mineralogy study on Baerbulawu refractory hematite ore in Kazakhstan has been carried out. The ore contains Fe 41.34%, and 87.26 % of which exists in hematite. Most hemarite occurs as fine or ultrafine grains and its average size is only 0.015mm. The gangue is mainly composed of quartz, mica, chlorite, kaolinite and other clay minerals.The liberation of hematite is only 66% when the ore is grinded to 75% -0.074mm, while part of gangue is already liberated from hematite under this grinding condition, so these gangue can be east away by magnetic separation in advance. Hematite will not liberate completely from gangue untill grinding fineness reaches 86% -0.038mm, at the same time, free particles of ultrafme hematite tend to coagulate randomly with quartz and clay minerals, so appropriate dispersant is necessary to prevent hematite and clay minerals from coagulation.Based on the process mineralogy research, final technology flowsheet is high-intensity magnetic separation by coarse grinding-rough magnetic concentrate regrinding-inverse flotation, and an ideal index is achieved. The yield of final iron concentrate is 43.46%, and its grade and recovery are 66.76% and 70.55% respectively. The research result is also useful to other similar iron ores.
Process mineralogy Refractory hematite ore Fine grains Liberation Classification Coagulation Dispersant
L. Wang G. Q.Shao W. F. Liu
Beijing General Research Institute of Mining and Metallurgy, Beijing, China
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
210-216
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）