PEMBUATAN PIGMEN TITANIUM DIOKSIDA DENGAN MEDIUM KLORIDA[Making Titanium Dioxide through Chloric Acid Leaching]

Solihin, Solihin; Ciptasari, Nurhayati Indah; Arini, Tri

doi:10.14203/metalurgi.v27i2.147

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“…But further increase of temperature from 70 to 90 o C does not increase extraction percentage of both nickel and iron significantly. Leaching of ore in sulfate solution often creates a sulfide formation reaction [10]. Some of metals in sulfate solution are believed to react with sulfate to forms metal sulfide.…”

Section: Resultsmentioning

confidence: 99%

The Processing of Low Grade Nickel Ore from South East Sulawesi

Solihin¹,

Mubarok

Hapid³

et al. 2015

AMR

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The deposit of nickel ore in Indonesia is very abundant. High grade ore has been processed to produce ferronickel, but low grade nickel ore is still left as by product without being processed. This kind of ore has been attempted to be processed through atmospheric leaching and carbon reduction, separately. In atmospheric leaching process, it is found that iron and nickel can be separated from other minerals through leaching in acid media. The performance of process is influenced by certain process variables such as temperature and acid concentration. At high temperature and high acid concentration, at least 80 % of nickel and 95 % of iron can be extracted in less than 3 hours. The recovery profile of nickel and iron are similar. Nickel and iron extraction increase with an increase in acid concentration and temperature. Another type of process, reduction smelting, results in sponge iron that can be smelted to produce iron-nickel alloy. The ore was reduced by carbon at temperature range of 800 - 1200 °C. The progress of reduction reaction between oxide minerals and carbon depends on reduction temperature. At high temperature, the reduction reaction takes place rapidly. The reduced ores was smelted to obtain iron-nickel alloy.

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Section: Resultsmentioning

confidence: 99%