Recovery of Sillimanite from Beach Sands--An Operator＇s Nightmare？
Recovery of Sillimanite from Beach Sands--An Operator＇s Nightmare？作者机构：Trimex Sands Private Limited Srikakulam Chinavatsavalasa 532404 Andhra Pradesh India Department of Chemical Engineering Andhra University College of Engineering (A) Visakhapatnam 530003 India
出 版 物：《Journal of Earth Science and Engineering》 (地球科学与工程（英文版）)
年 卷 期：2013年第3卷第4期
页 面：270-281页
学科分类：0832[工学-食品科学与工程（可授工学、农学学位）] 12[管理学] 120203[管理学-旅游管理] 1202[管理学-工商管理] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
主 题：硅线石 回收率 运营商 金沙 pH值调节剂 甲基异丁基甲醇 海滩 最终产品
摘 要：Sillimanite, chemically named aluminum silicate, 3Al2O3SiO2 is one of the three forms of alumino silicate polymorphs and commonly encountered in aluminous metamorphic, plutonic and volcanic rocks and their weathering products. Traditionally in India, sillimanite is upgraded by froth floatation technique using oleic acid as a collector cum frother, sodium silicate as depressant and soda ash as pH regulator. At TSPL (Trimex Sands Pvt Ltd), conventional mechanical float cells are installed to float sillimanite. In addition to the usual problems associated with conventional cells, poor flow ability of the sillimanite concentrate is experienced in dry circuit due to the presence of sodium oleate. Fine garnet in the sillimanite concentrate contributes to high iron content in the final product, making sillimanite separation a nightmare for operators (lower recoveries coupled with inferior grades). Various efforts were made to improve the performance of the circuit such as introduction of additional frother like MIBC (methyl ISO butyl carbinol), optimizing the operating parameters such as pulp density, collector dosage, depressant dosage, air flow rate, pH etc., use of collector aids, stage wise addition of reagents etc.. The challenges faced to produce a sillimanite product with stringent quality norms and the efforts made to improve the grade and recovery are described in this paper.
维普期刊数据库