Analysis the Effect of Charcoal Mass Variation to Ni Content, Sinter Strength and Yield on Sintering Process of Limonitic Laterite Nickel Ore

Abstract

The depletion of sulfide nickel ore and the growing of stainless steel demand each year cause the use of low-grade laterite nickel ore continues to increase. Due to very low nickel content, there is no optimal process to extract them. One of the alternative processes being developed now is the sintering-blast furnace process which produces Nickel Pig Iron (NPI). This research was conducted by sintering limonitic laterite nickel ore using charcoal as fuel and limestone as a flux. This research aims to analyze the effect of charcoal mass variation on Ni content, sinter strength, and the yield on the sintering process of limonitic laterite nickel ore. Charcoal and limestone demand calculated using energy balance and mass balance, then varied charcoal mass to feed material. Feed materials are fed in the furnace, heated at a temperature of 1200oC with 4 hours holding time. Next, the sinter yield was calculated. EDX, XRD, and Drop tests were also performed to determine Ni content, sinter compounds, and strength. The highest Ni content was 3.66% which was obtained by adding 9.9 kg charcoal. The highest sinter strength and yield also obtained by adding 9.9 kg charcoal (72.30% and 86.44%, respectively). Mayor phases which formed on sinter with 9.9 kg charcoal addition is nickel-iron oxide.

Migration and Aggregation Behavior of Nickel and Iron in Low Grade Laterite Ore with New Additives

“…In this study, ferronickel concentrate from low-grade laterite nickel Province was prepared, and the migration and accumulation behavior of f ticles in the reduction process were studied. The conclusions are as follow (1) The ferronickel concentrate, with 8.62% Ni and 80.1% Fe was prepar duction roasting at 1250 °C for 60 min in the presence of 30% ferronic…”

“…Nickel is an important strategic reserve metal and plays an extremely important role in the development of the national economy [1]. The consumption of nickel resources in China ranks first in the world, but the shortage of nickel resources has become increasingly problematic.…”

Role of Cooling Temperature on Impurities Precipitation of Metal Sulfate Solution Derived from Crude Ferronickel Leaching Using MgO

“…The sample used is ferronickel smelted from a mini blast furnace (Table 1) using our previous research [16,17]. The grinding and sizing process on ferronickel samples so that the ferronickel powder size is 50 mesh.…”

Effect of pH on Precipitation of Ferronickel Leaching Solution by Using MgO for Mixed Sulfate Precipitate Synthesis

“…The samples used in this study are ferronickel products from Mini Blast Furnace which was processed in accordance with our previous research [16,17]. The EDX test was performed on the ferronickel sample to determine the composition of the elements contained in the ferronickel piece.…”