On-line bias estimation using conductivity measurements

被引：5

作者：

Maldonado, M. ^{[1
]}

Desbiens, A. ^{[1
]}

del Villar, R. ^{[2
]}

Chirinos, J. ^{[2
]}

机构：

[1] Univ Laval, Dept Elect & Comp Engn, LOOP, Quebec City, PQ G1V 0A6, Canada

[2] Univ Laval, Dept Min Met & Mat Engn, LOOP, Quebec City, PQ G1V 0A6, Canada

来源：

MINERALS ENGINEERING | 2008年 / 21卷 / 12-14期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Column flotation; Process instrumentation; Process control; Mineral processing;

D O I：

10.1016/j.mineng.2008.05.011

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Bias is an important variable in column flotation operation: negative values will deteriorate the concentrate grade due to mechanical entrainment of gangue, whereas excessive bias will reduce the particle residence-time in the collection zone as well as dilute the tails stream. Its estimation is usually made, at a high instrumentation cost, through a water mass-balance in the collection zone, nonetheless providing unreliable estimates. This paper presents a new method based on the measurement of the volumetric fraction of wash-water underneath the pulp-froth interface, using electrical-conductivity sensors. The method has been evaluated in a pilot flotation column, with a two-phase system. The results obtained indicate that it can be directly used for supervision and control of flotation column operation. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：851 / 855

页数：5

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