Selective pressure leaching of Fe (II)-rich limonitic laterite ores from Indonesia using nitric acid

2013 ◽  
Vol 45 ◽  
pp. 151-158 ◽  
Author(s):  
Baozhong Ma ◽  
Chengyan Wang ◽  
Weijiao Yang ◽  
Bo Yang ◽  
Yonglu Zhang
Keyword(s):  
Nitric Acid ◽  
Selective Pressure ◽  
Pressure Leaching ◽  
Laterite Ores

Aluminum Removal from Leach Liquor of Nitric Acid Pressure Leaching Laterite Ores

2013 ◽  
Vol 634-638 ◽  
pp. 3191-3195 ◽  
Author(s):  
Bao Zhong Ma ◽  
Cheng Yan Wang ◽  
Wei Jiao Yang ◽  
Fei Yin ◽  
Yong Qiang Chen
Keyword(s):  
Nitric Acid ◽  
Reaction Temperature ◽  
Traditional Method ◽  
Filtration Rate ◽  
Ph Value ◽  
Ageing Time ◽  
Leach Liquor ◽  
Precipitation Method ◽  
Pressure Leaching ◽  
Laterite Ores

In this paper, the removal of aluminum in leach liquor of nitric acid pressure leaching laterite was investigated, and a new method of aluminum removal by precipitation with calcium sulphide was presented. The effect of reaction temperature, pH value before ageing and ageing time on the removal of aluminum were examined in details. The optimum conditions were determined as follows: reaction temperature 40 °C, pH 3.9~4.1 (before aging) and aging time 30 min. Compared with the traditional precipitation method, the loss of nickel and cobalt was less than 1% in the obtained aluminum precipitate slag, which is 3% lower than that by the traditional method; the filtration rate of aluminum precipitate slurry was faster than the traditional method, when the filtration press was controlled at -0.04 MPa, the filtration rate of aluminum precipitate slurry could reach 0.109 m3/(h•m2), which is 6.5 times higher than that obtained by the traditional method.

Pilot-scale plant study on the innovative nitric acid pressure leaching technology for laterite ores

2015 ◽  
Vol 155 ◽  
pp. 88-94 ◽  
Author(s):  
Baozhong Ma ◽  
Weijiao Yang ◽  
Bo Yang ◽  
Chengyan Wang ◽  
Yongqiang Chen ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Pilot Scale ◽  
Pressure Leaching ◽  
Laterite Ores

Nitric acid pressure leaching of limonitic laterite ores: Regeneration of HNO3 and simultaneous synthesis of fibrous CaSO4·2H2O by-products

2020 ◽  
Vol 27 (11) ◽  
pp. 3249-3258
Author(s):  
Shuang Shao ◽  
Bao-zhong Ma ◽  
Xin Wang ◽  
Wen-juan Zhang ◽  
Yong-qiang Chen ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Pressure Leaching ◽  
Laterite Ores ◽  
Simultaneous Synthesis ◽  
By Products

Microwave pretreatment for enhanced selective nitric acid pressure leaching of limonitic laterite

2021 ◽  
Vol 28 (10) ◽  
pp. 3050-3060
Author(s):  
Fei He ◽  
Bao-zhong Ma ◽  
Cheng-yan Wang ◽  
Yu-tian Ma ◽  
Edouard Asselin ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Pressure Leaching ◽  
Microwave Pretreatment

scholarly journals On the Denickelizing of Laterite Ores by Ammonia Pressure Leaching

1969 ◽  
Vol 85 (970) ◽  
pp. 91-96 ◽  
Author(s):  
Kazuyoshi SHIMAKAGE ◽  
Hajime OKUYAMA ◽  
Susumu MORIOKA
Keyword(s):  
Pressure Leaching ◽  
Laterite Ores

Pressure Leaching of Limonitic Laterite Ores in H2SO4-Mg(NO3)2 Medium

2012 ◽  
Vol 524-527 ◽  
pp. 2021-2025
Author(s):  
Bao Zhong Ma ◽  
Cheng Yan Wang ◽  
Wei Jiao Yang ◽  
Fei Yin ◽  
Yong Qiang Chen
Keyword(s):  
Reaction Temperature ◽  
Pressure Leaching ◽  
Mass Ratio ◽  
Optimum Conditions ◽  
Solid Ratio ◽  
Nickel Cobalt ◽  
Laterite Ores ◽  
Acid Consumption ◽  
Leaching Experiments ◽  
Laterite Ore

A limonitic laterite ore from Indonesea was treated by pressure leaching in H2SO4-Mg(NO3)2 medium, using Mg(NO3)2 as an oxidant. Experiments were conducted in order to determine the optimum conditions by studying various parameters, including Mg(NO3)2/ore mass ratio, initial acidity, reaction temperature, holding time and liquid/solid ratio. Pressure leaching experiments showed that nickel, cobalt and iron extractions were 90.8 %, 91.9 % and 2.1 % after 60 min of leaching at 493 K with 0.06 g/g Mg(NO3)2/ore mass ratio, 140 g/L initial acidity and 2 mL/g liquid/solid ratio.The total decrement of acid consumption was 72 g H2SO4/kg ore in the presence of Mg(NO3)2.

Innovative technology for processing saprolitic laterite ores by hydrochloric acid atmospheric pressure leaching

2015 ◽  
Vol 71 ◽  
pp. 1-6 ◽  
Author(s):  
Qiang Guo ◽  
Jingkui Qu ◽  
Bingbing Han ◽  
Peiyu Zhang ◽  
Yunxia Song ◽  
...  
Keyword(s):  
Hydrochloric Acid ◽  
Atmospheric Pressure ◽  
Innovative Technology ◽  
Pressure Leaching ◽  
Laterite Ores
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