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- Title
STRENGTH WEAKENING MECHANISM OF IRON-ADSORBED RARE EARTH ORE DURING DISPLACEMENT REACTION.
- Authors
XIAOJUN WANG; KUI ZHAO; YULONG ZHUO; SHUQIANG DENG; SHIRONG CAO; YONGXIN LI; WEN ZHONG
- Abstract
This paper deals with the permeability and strength weakening mechanism of rare earth ore during displacement reaction. We conducted three tests on rare earth ore: the laboratory leaching test, the permeability coefficient determination test, and the triaxial compression test. Test results show that: permeability coefficients change with the occurrence of displacement reaction whose rate directly affects the change magnitude; curves of the relationship between permeability coefficients, strength and timespan are used to analyse the strength weakening process induced by displacement reaction and permeability, which can be divided into the intensive stage (at the leaching duration of 0-8 h) and the steady stage (at the leaching duration of 8-16 h) according to the changing magnitude of the strength parameter. Through analysis of the comprehensive test result, it can be obtained that: both displacement reaction and seepage help weaken ore strength parameters by varying the internal pore structure of the ore; after comparing the changing magnitude of permeability coefficients and ore strength at the intensive stage and the one at the steady stage, the author ascertains that the predominant cause to weakened ore strength rests on the strong effect of displacement reaction.
- Subjects
ORE sampling &; estimation; STRENGTH of material testing; SUBSTITUTION reactions; LEACHING; MATERIALS compression testing; HYDRAULIC conductivity
- Publication
Oxidation Communications, 2016, Vol 39, Issue 4-III, p3797
- ISSN
0209-4541
- Publication type
Article