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Exploration of HPAL Process Conditions and Analysis of Particle Behavior at High Temperatures
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Dechao XIAO1, Lianjun WEI1, Shijun WANG1, Hong YANG1, Jinping DENG1, Xuantong MA1, Xing CAI2
Mining and Metallurgical Engineering | 2025, 45(5) : 154 - 158
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Mining and Metallurgical Engineering | 2025, 45(5): 154-158
• METALLURGY •
Exploration of HPAL Process Conditions and Analysis of Particle Behavior at High Temperatures
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Dechao XIAO1, Lianjun WEI1, Shijun WANG1, Hong YANG1, Jinping DENG1, Xuantong MA1, Xing CAI2
Affiliations
  • 1.Guangdong Branch of Ningbo Contemporary Brunp Lygend Co., Ltd., Foshan 528000, Guangdong, China
  • 2.Guangdong Brunp Recycling Technology Co., Ltd., Foshan 528000, Guangdong, China
Published: 2025-10-01 doi: 10.3969/j.issn.0253-6099.2025.05.027
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With nickel laterite ore from Morowali of Indonesia as the raw material, effects of various factors, including reaction time and temperature, stirring speed, acid-to-ore ratio, and slurry concentration, on the leaching rate were systematically investigated. Additionally, the leaching mechanism was explored by using the PHREEQC, a thermodynamic calculation software. The results show that after one hour reaction at 250 ℃, with acid-to-ore ratio of 300 kg/t and slurry concentration of 25%, the leaching rates of Ni and Co can reach 98.40% and 99.90%, respectively, while the leaching rates of Fe and Al are just 3.84% and 40.25%, respectively. The high selectivity of high pressure acid leaching (HPAL) is attributed by the factor that at high temperatures, not only the hydrolysis reaction of Fe and Al can be promoted, but also the pOH can be decreased from 14 to 10, which thereby inhibits leaching of Fe and Al. As the temperature rises to above 200 ℃, the number of H+ increases, which can ensure a sufficient amount of H+ for leaching of nickel and cobalt metals.

nickel laterite ore  /  high pressure acid leach (HPAL)  /  high temperature  /  nicke  /  cobalt
Dechao XIAO, Lianjun WEI, Shijun WANG, Hong YANG, Jinping DENG, Xuantong MA, Xing CAI. Exploration of HPAL Process Conditions and Analysis of Particle Behavior at High Temperatures[J]. Mining and Metallurgical Engineering, 2025 , 45 (5) : 154 -158 . DOI: 10.3969/j.issn.0253-6099.2025.05.027
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Year 2025 volume 45 Issue 5
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doi: 10.3969/j.issn.0253-6099.2025.05.027
  • Receive Date：2025-04-15
  • Online Date：2026-03-18
  • Published：2025-10-01
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  • Received：2025-04-15
Affiliations
    1.Guangdong Branch of Ningbo Contemporary Brunp Lygend Co., Ltd., Foshan 528000, Guangdong, China
    2.Guangdong Brunp Recycling Technology Co., Ltd., Foshan 528000, Guangdong, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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