A PROCESS FOR EXTRACTION OF NICKEL FROM LOW GRADE CHROMITE ORE

A PROCESS FOR EXTRACTION OF NICKEL FROM LOW GRADE CHROMITE ORE

The present invention is a process for the extraction of nickel from low-grade chromite ore containing 0.6 to 0.9 % nickel, said process comprises of crushing, drying and grinding of low grade Chromite Ore to obtain +100 to -400 mesh B.S.S. with 85% -200 mesh B.S.S., subjecting the crushed ore to re...

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Hauptverfasser: ASHUTOSH, UGLE, ANAND, SASHI, BHATTACHARYA, INDIRA, NARAYAN, DATTA, PARTHASARATHI, BEHERA, SNEHASIS, TRIPATHY, ANIL, KANTA, PRASAD, KODLI HIRANYA VARNA, DAS, SUDIPTA, RAO, KARNAM, SRINIVAS, MURTHY, B., V. RAMAN, SANJAY, KALI, RAO, KATARAM, RAJESWARA, BHOI, BHAGYADHAR, DAS, SUBIR, SIMHA, HARI, DAS, RADHANATH, PRASAD, SUBBAIAH, TONDEPU, PARLIKAR, RAMCHANDRA, NAGESH, YUGANDHAR, GAJULA, VENKATA, GHOSH, MALAY, KUMAR
Format: Patent
Sprache:eng ; fre ; ger
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CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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creator ASHUTOSH, UGLE
ANAND, SASHI
BHATTACHARYA, INDIRA, NARAYAN
DATTA, PARTHASARATHI
BEHERA, SNEHASIS
TRIPATHY, ANIL, KANTA
PRASAD, KODLI HIRANYA VARNA
DAS, SUDIPTA
RAO, KARNAM, SRINIVAS
MURTHY, B., V. RAMAN
SANJAY, KALI
RAO, KATARAM, RAJESWARA
BHOI, BHAGYADHAR
DAS, SUBIR
SIMHA, HARI
DAS, RADHANATH, PRASAD
SUBBAIAH, TONDEPU
PARLIKAR, RAMCHANDRA, NAGESH
YUGANDHAR, GAJULA, VENKATA
GHOSH, MALAY, KUMAR
description The present invention is a process for the extraction of nickel from low-grade chromite ore containing 0.6 to 0.9 % nickel, said process comprises of crushing, drying and grinding of low grade Chromite Ore to obtain +100 to -400 mesh B.S.S. with 85% -200 mesh B.S.S., subjecting the crushed ore to reduction-roasting with or without pre-mixing of oil, leaching the reduced material in an ammonia-ammonium carbonate solution using oxygen or compressed air at elevated pressure of 0.2 to 1.5 kgs/cm , precipitating the dissolved nickel as basic nickel carbonate and co-precipitating cobalt and recovering ammonia as well as carbon dioxide for recycle and obtaining a magnetic fraction through a wet magnetic separation technique which is suitable for use in low phosphorous iron production.
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subjects CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
title A PROCESS FOR EXTRACTION OF NICKEL FROM LOW GRADE CHROMITE ORE
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