“…As a result, the reaction time affects how much metal recovery is possible. Nickel could be recovered by 88.33% after reduction at 1150°C for 60 minutes [20]. Research employing a metallurgical procedure with a selective reducing agent-gypsum-at different concentrations has yielded nickel with a content of 4.13% and a recovery percentage of 91.81% when 91.81% gypsum is added [21].…”
The creation of nickel-smelting products including important metals like nickel, cobalt, and copper is a persistent issue in the nickel mining business. Another secondary source of precious metals is nickel slag. In addition, the massive amounts of nickel slag generated by the nickel smelter sector will pollute the environment, particularly the soil, since the smelting slag contains hazardous materials. This study examines techniques for recovering precious metals from nickel slag by reviewing publications from Springer Link, Google Scholar, MDPI, ScienceDirect, Membrane Journal, and other authors. The two types of metal recovery techniques from nickel slag that were examined were hydrometallurgical and pyrometallurgical techniques. This review article describes a pyrometallurgical method that involves roasting and selective reduction. In the meantime, the hydrometallurgical techniques were examined in the high-pressure oxidative acid leaching process, the atmospheric acid leaching method, and the bioleaching process. A roadmap for research designs that can be used to recover valuable metals from nickel slag sustainably has been created due to the completed literature evaluation.
“…As a result, the reaction time affects how much metal recovery is possible. Nickel could be recovered by 88.33% after reduction at 1150°C for 60 minutes [20]. Research employing a metallurgical procedure with a selective reducing agent-gypsum-at different concentrations has yielded nickel with a content of 4.13% and a recovery percentage of 91.81% when 91.81% gypsum is added [21].…”
The creation of nickel-smelting products including important metals like nickel, cobalt, and copper is a persistent issue in the nickel mining business. Another secondary source of precious metals is nickel slag. In addition, the massive amounts of nickel slag generated by the nickel smelter sector will pollute the environment, particularly the soil, since the smelting slag contains hazardous materials. This study examines techniques for recovering precious metals from nickel slag by reviewing publications from Springer Link, Google Scholar, MDPI, ScienceDirect, Membrane Journal, and other authors. The two types of metal recovery techniques from nickel slag that were examined were hydrometallurgical and pyrometallurgical techniques. This review article describes a pyrometallurgical method that involves roasting and selective reduction. In the meantime, the hydrometallurgical techniques were examined in the high-pressure oxidative acid leaching process, the atmospheric acid leaching method, and the bioleaching process. A roadmap for research designs that can be used to recover valuable metals from nickel slag sustainably has been created due to the completed literature evaluation.
“…The nickel grade decreases with the increase of the MgO/SiO 2 ratio, but the nickel recovery increases with the increase of the MgO/SiO 2 ratio. Excessive addition of MgO inhibited the agglomeration of nickel-iron particles and affected the overall effect of the selected reduction process as shown in Figure 10 [92]. Figure 10. Effect of binary basicity (B = MgO/SiO 2 ) on grade and recovery of (a) nickel; (b) iron [92].…”
Section: Metallurgical Properties Of Mgo-bearing Pelletsmentioning
confidence: 99%
“…Excessive addition of MgO inhibited the agglomeration of nickel-iron particles and affected the overall effect of the selected reduction process as shown in Figure 10 [92]. Figure 10. Effect of binary basicity (B = MgO/SiO 2 ) on grade and recovery of (a) nickel; (b) iron [92]. …”
Section: Metallurgical Properties Of Mgo-bearing Pelletsmentioning
It is imperative to reduce the pollution and energy consumption in the blast furnace ironmaking process. High pellets operation is a developing direction in the future. The function of blast furnace slag system cannot be ignored. In order to balance the MgO content in blast furnace slag and improve the metallurgical properties of pellets in the high pellets ratio operation, the research on MgO-bearing pellets is necessary. In this paper, the metallurgical properties of MgO-bearing pellets and the properties of blast furnace slag effect by MgO in different raw material conditions, especially for Vanadium Titanomagnetite, were analysed and summarized. This review provided a reference for the development of MgO-bearing pellets and the performance of blast furnace slag effect by MgO. It is hoped to reduce pollution and promote the technical progress of blast furnace ironmaking.
“…As a result, using physical treatment techniques to properly upgrade these ores is generally difficult. Pyrometallurgical extraction techniques are used to extract nickel from laterite ores, which may yield significant nickel recoveries, to solve this challenge [9][10][11][12][13][14][15][16][17][18][19][20][21]. Furthermore, the laterite mineral will have a significant impact on the reducing roasting process.…”
Section: Introductionmentioning
confidence: 99%
“…Furthermore, the laterite mineral will have a significant impact on the reducing roasting process. Since nickel is found in goethite and silicate minerals, an addition must be used to dissolve the silicate and nickel bonding [13][14][15][16][17][18][19][20][21]. Moreover, the higher the addition of carbon will get high percentage of nickel, but it can cause the nickel and iron content to decrease beyond the optimal value because it is caused by the large amounts of carbon residue which will inhibit the reduction process [14].…”
Thermal upgrading is the process for nickel extraction in selective reduction with holding temperature in low (300-500 °C). The effect and type of reductor are the main factor during this process. With those factors, this research will be finding the variation of reductor type. The first step is limonite and reductor characterization. Ni, Fe, Mg, Al, and Si levels in limonite are 1.4 Ni, 50.5 Fe, 1.81 Al, 4.86 Mg, and 16.5 Si weight percent, respectively. The iron oxide/oxyhydroxide content of limonite is 94.4 percent and 5.6 percent silicate. For reductor, those are graphite, palm kernel shell, and anthracite with carbon percentage 98, 77, and 68 %. From XRF, the optimum nickel grade is in the graphite and anthracite with 6.5 and 7 wt%. For phases, the ferronickel is appearing in the high intensity for the optimum reductor type and the microstructure is around 5-10 um for both. Moreover, the optimum reductor type are graphite and anthracite. Keyword: reductor type, limonite, phase, microstructure, thermal upgrading.
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