Sulphuric acid leaching of the Nsuta manganese carbonate ore

被引：13

作者：

Momade, FWY

机构：

[1] Dept. Mineral Proc. Extractive M., Inst. of Mining and Mineral Eng., University of Science and Technology, Kumasi

来源：

HYDROMETALLURGY | 1996年 / 40卷 / 1-2期

关键词：

D O I：

10.1016/0304-386X(94)00089-L

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Sulphuric acid leaching of the Nsuta (Ghana) manganese carbonate ore was investigated at different temperatures and using various particle size fractions and acid concentrations. Results showed that both initial rate and overall extractions were affected by acid concentration, initial particle fraction and the temperature of leaching. Manganese carbonate dissolution in acid was more favoured at elevated temperatures. A study of the Mn-CO3-SO4 system indicated the appearance of a MnSO4 stability region between Mn2+ and MnCO3 predominance areas as the sulphate activity {S} exceeded unit molality. The territory increased mainly at the expense of Mn2+ as sulphate activity increased. The practical implication of this is the probable formation of MnSO4 in the particle pores and, therefore, the alteration of the mechanism/kinetics of leaching, as was experienced during tests with the Nsuta carbonate samples. It was also observed that the formation of MnSO4 in the pores helped in the disintegration of the porous coarser particles during leaching.

引用

页码：123 / 134

页数：12

共 25 条

[1] BIOLOGICAL AND CHEMICAL-PROCESSING OF LOW-GRADE MANGANESE ORES [J].

ABBRUZZESE, C ;

DUARTE, MY ;

PAPONETTI, B ;

TORO, L .

MINERALS ENGINEERING, 1990, 3 (3-4) :307-318

[2]

Abbruzzese C, 1987, SEPARATION PROCESSES, P77

[3]

BODI D, 1966, FEMIPARI KUTATO INTE, V8, P225

[4]

BRICKER O, 1965, AM MINERAL, V50, P1296

[5]

DUNDUA RG, 1983, ZH PRIKL KHIM, V56, P1764

[6]

DZIGBODIADJIMAH K, 1993, 1ST IMME NATL SEM CU

[7]

Herring A.P., 1965, T SMEAIME, V231, P191, DOI [10.13671/j.hjkxxb.2004.06.024, DOI 10.13671/J.HJKXXB.2004.06.024]

[8]

KALDI P, 1971, VESZPREMI VEGYIP EGY, V12, P119

[9]

KESE GO, 1985, MINERAL ROCK RESOURC

[10]

LEE GA, 1949, J ELECTROCHEM SOC, V95, P2

← 1 2 3 →