摘要
对国内某铝土矿进行石灰拜耳法溶出研究,在当前技术条件下,当石灰添加量按C/S=1.3~1.5添加时,赤泥A/S=1.5~2.0,N/S=0.45~0.5.通过改变石灰添加量(C/S)、搅拌强度、液固比、粒度、反应时间进行溶出实验,确定出最优溶出条件:在温度为265℃下,石灰添加量按C/S=1.3添加,液固比为3.8,粒度小于74μm的矿石占90%以上,搅拌转速为500 r/min.铝土矿的实际溶出率在82%以上,赤泥N/S在0.3左右,A/S在1.4以下.
The dissolution of a bauxite deposit in China is studied by lime Bayer process. Under the current technical conditions,when the adding lime dosage is C/S = 1. 3 ～ 1. 5,the red mud is A/S = 1. 5 ～ 2. 0,N/S = 0. 45 ～ 0. 5. The dissolution test is carried out by changing the lime dosage（ C/S）,stirring intensity,liquid-solid ratio,particle size and reaction time. The optimal leaching conditions are then determined： temperature 265 ℃,lime dosage C/S = 1. 3,solid-liquid ratio 3. 8,particle size smaller than 74 μm accounting for more than 90%,and agitation speed 500 r/min. The actual dissolution rate of bauxite is above 80%,the red mud N/S at about 0. 3,and A/S below 1. 4.
作者
张涛
俞小花
彭建蓉
史英杰
施辉献
和晓才
ZHANG Tao YU Xiaohua PENG Jianrong SHI Yingjie SHI Huixian HE Xiaocai(Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China Kunming Metallurgical Research Institute, Kunming 650031, China)
出处
《昆明理工大学学报（自然科学版）》
CAS
2017年第1期9-13,共5页
Journal of Kunming University of Science and Technology(Natural Science)
基金
国家自然科学基金项目(51374118)
云南省选冶新技术重点实验室开放基金项目(xy2015kf03)
关键词
石灰拜耳法
铝土矿
赤泥
实际溶出率
碱耗
lime Bayer process
bauxite
red mud
actual dissolution rate
consumption of sodium hydroxide
