文献类型：期刊文献

中文题名：贵州清镇地区高硫型铝土矿预焙烧溶出性能研究

英文题名：Digestion Performance of the Roasted Ore from Pre-roasting of Guizhou High-sulfur Bauxite

作者：路坊海

第一作者：路坊海

机构：[1]贵州理工学院材料科学与冶金工程学院;[2]贵州省特种功能材料2011协同创新中心

第一机构：贵州理工学院材料与冶金工程学院

年份：2015

卷号：35

期号：2

起止页码：107-110

中文期刊名：矿冶工程

外文期刊名：Mining and Metallurgical Engineering

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD_E2015_2016】；

基金：贵州省科学技术基金(黔科合J字[2014]2083号);贵州理工学院自然科学基金项(XJ2K20130809)

语种：中文

中文关键词：高硫型铝土矿;焙烧;溶出性能

外文关键词：high-sulfur bauxite ; roasting ; digestion performance

摘要：采用马弗炉焙烧处理贵州清镇地区某高硫型铝土矿并研究了焙烧精矿的溶出性能。结果表明:当焙烧温度700℃,焙烧时间30min时,矿石全硫含量从0.97%下降至0.21%,降低了78%,焙烧精矿含硫量达到拜耳法工艺要求;最佳溶出条件为:溶出温度260℃,苛性碱浓度190.32g/L,溶出时间60min,石灰添加量12%,固含300g/L,此时精矿实际溶出率82.45%,相对溶出率96.26%,分别比原矿直接溶出高4.28个百分点和4.85个百分点;精矿溶出赤泥A/S为1.22,N/S为0.25,分别比原矿直接溶出低0.29和0.09,整体溶出性能优于原矿。
The high-sulfur bauxite from Qingzhen Region in Guizhou Province was roasted in a muffle furnace and the roasted ore obtained was used in the test for investigating the digestion performance. It was found that after the bauxite being roasted at temperature of 700 ℃ for 30 min, the total sulfur content decreased by 78%, from 0.97% to 0.21%, resulting in the sulfur content in the concentrate up to the requirements of the Bayer process. Then the optimum conditions for digestion was decided as follows： temperature at 260 ℃, caustic sodium concentration at 190.32 g/L, digestion time of 60 min, lime addition of 12%, solid content of 300 g/L. Under such conditions, the practical digestion rate of alumina of the roasted ore was 82.45%, with relative digestion rate at 96.26%, 4.28 percentage point and 4.85 percentage point higher, respectively, compared to the raw ore. A/S and N/S of red mud of roasted ore is 1.22 and 0.25,with a reduction of 0.29 and 0.09 respectively, compared to red mud directed from raw ore, indicating the digestion performance of the roasted ore is better than that of raw ore.