KARIŞIK BİR NİKEL-KOBALT HİDROKSİT ÇÖKELEĞİNDEN NİKEL KAZANIMI

Karışık bir nikel-kobalt hidroksit çökeleğinden (MHP) nikel kazanımı tasarlanmış ve deneysel olarak araştırılmıştır. Nikel kazanımı için sülfürik asit miktarının, liç süresinin, liç sıcaklığının ve karıştırma hızının etkileri incelenmiştir. 0,75M sülfürik asit miktarında, 30°C liç sıcaklığında ve 400 rpm karıştırma hızı şartlarında, 60 dakika liç işleminden sonra %90’dan daha fazla nikel ve yaklaşık %80 kobalt çözeltiye alınmıştır. Araştırılan koşullar altında katı-çözelti karışımının pH değeri 1,23 olarak belirlenmiştir. Liç sıcaklığının ve karıştırma hızının MHP numunesinden nikel kazanımına faydalı etkilerinin olmadığı gözlemlenmiştir. Yeni MHP numunesi üzerinde yapılan XRD incelemeleri sonrasında elde edilen sonuç ve piklerin oldukça geniş olması numunenin amorfumsu katı yapıda olduğunu ortaya çıkartmıştır.

EXTRACTION OF NICKEL FROM A MIXED NICKEL-COBALT HYDROXIDE PRECIPITATE

The extraction of nickel from a mixed nickel-cobalt hydroxide precipitate (MHP) was conceivedand experimentally explored. The effect of sulphuric acid concentration, leaching time, leachingtemperature and stirring speed on nickel extraction was investigated. After 60 min leaching time,more than 90% of nickel and approximately 80% of cobalt were taken into the leach solutionunder the following conditions: 0.75M sulphuric acid concentration, 30°C leaching temperatureand 400 rpm stirring speed. pH of the leach slurry was determined as 1.23 under the conditionsexplored. It was observed that there is no beneficial effect of leaching temperature and stirringspeed on the extraction of nickel from the MHP sample. The XRD pattern of the fresh MHPsample revealed the data and peak of the sample widening which is indicative of amorphoussolid structure.

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