LIME-CONCENTRATE PROCESS FOR ROASTING OF COPPER-BEARING SULFIDES .2. EFFECT OF SULFIDE - LIME RATIO, AIR-FLOW RATE, PELLET SIZE AND POROSITY ON REACTION-KINETICS

Authors
TERRY BS RIVEROS G JEFFES JHE
Citation
Bs. Terry et al., LIME-CONCENTRATE PROCESS FOR ROASTING OF COPPER-BEARING SULFIDES .2. EFFECT OF SULFIDE - LIME RATIO, AIR-FLOW RATE, PELLET SIZE AND POROSITY ON REACTION-KINETICS, Transactions - Institution of Mining and Metallurgy. Section C. Mineral processing & extractive metallurgy, 103, 1994, pp. 30000201-30000209
Citations number
6
Categorie Soggetti
Metallurgy & Mining",Mineralogy
Journal title
Transactions - Institution of Mining and Metallurgy. Section C. Mineral processing & extractive metallurgy → ACNP
ISSN journal
03719553
Volume
103
Year of publication
1994
Pages
30000201 - 30000209
Database
ISI
SICI code
0371-9553(1994)103:<30000201:LPFROC>2.0.ZU;2-O
Abstract
The air-roasting of pellets consisting of copper-iron sulphides and li me has been investigated to explore the possibility of developing a me tal-production process that eliminates the emission of sulphur dioxide gas. The effects of pellet porosity, sulphide:lime ratio, air flow ra te and pellet size on reaction rates and reaction products were invest igated. A thermogravimetric technique was used under air atmosphere an d the weight gain of a pelletized sample was used to identify and stud y the phases present in the reaction products. The experimental result s indicate that at 500-degrees-C a completely reacted pellet can be pr oduced in about 50 min with a very low emission of sulphur dioxide. Th e reaction products are primarily CaSO4, Fe2O3, CuSO4 and CuO.CuSO4, a lthough some CaS may also be produced.