Oxidative fusion and alkaline leaching for manganese extraction from low grade silicate ore

2021 ◽  
Author(s):  
D. T. Andini ◽  
E. Prasetyo ◽  
H. I. Qudus
Keyword(s):  
Low Grade ◽  
Alkaline Leaching ◽  
Manganese Extraction

Manganese extraction by reduction–acid leaching from low-grade manganese oxide ores using CaS as reductant

2015 ◽  
Vol 25 (5) ◽  
pp. 1677-1684 ◽  
Author(s):  
Chang-xin LI ◽  
Hong ZHONG ◽  
Shuai WANG ◽  
Jian-rong XUE ◽  
Fang-fang WU ◽  
...  
Keyword(s):  
Manganese Oxide ◽  
Acid Leaching ◽  
Low Grade ◽  
Manganese Extraction

Pelletizing and alkaline leaching of powdery low grade zinc oxide ores

2007 ◽  
Vol 89 (3-4) ◽  
pp. 305-310 ◽  
Author(s):  
Linyong Feng ◽  
Xianwan Yang ◽  
Qingfeng Shen ◽  
Mingli Xu ◽  
Bingjie Jin
Keyword(s):  
Zinc Oxide ◽  
Low Grade ◽  
Alkaline Leaching

scholarly journals Sulphuric acid leaching of low/medium grade managanese ores using a novel nitrogeneous reductant-NH3NH2HSO4

2013 ◽  
Vol 49 (1) ◽  
pp. 97-106 ◽  
Author(s):  
D. Hariprasad ◽  
M. Mohapatra ◽  
S. Anand
Keyword(s):  
Sulphuric Acid ◽  
Acid Leaching ◽  
Pulp Density ◽  
Low Grade ◽  
Optimum Conditions ◽  
Different Types ◽  
Mn Content ◽  
Mn Recovery ◽  
Manganese Extraction ◽  
Mn Ore

Low and medium grade land as well sea based manganese ores were used for manganese extraction in H2SO4 - NH3NH2HSO4 (hydrazine sulphate) medium For land based Mn ores, only Mn recovery is important but for sea nodules which contain substantial amounts Co, Ni, and Cu, their recovery is equally important. In the present studies four samples used were: Indian ocean manganese nodules, medium and low grade Mn ores of Gujarat, and low grade Mn ore of Orissa, India. The Mn content of these ores varied from 15 to 39%. The objective of this work is to establish a reductant which can be used for leaching Mn from all types of ores. The optimum conditions established for nodules by varying parameters such as time, temperature, pulp density, H2SO4 and NH3NH2HSO4 concentrations were: pulp density 10%, time 0.5h, temperature 110?C, NH3NH2HSO4 3.25 g/10g, H2SO4 2.0% (v/v) for 96.9% Mn, 85.25% Cu, 92.58% Ni and 76.5% Co extractions. More than 92% Mn could be leached from different types of ores by varying amount of reductant and acid concentration at 35?C. Depending on Mn content 1.0 to 1.2 times stochiometric amount of reductant and 1.5 to 1.8 times sulphuric acid were required for >92% Mn extraction.

Alkaline leaching of zinc from low-grade oxide zinc ore using ammonium citrate as complexing agent

2015 ◽  
Vol 4 (3) ◽  
Author(s):  
Shiwei Li ◽  
Aiyuan Ma ◽  
Kun Yang ◽  
Shaohua Yin ◽  
Libo Zhang ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Ammonium Citrate ◽  
Complexing Agent ◽  
Low Grade ◽  
Alkaline Leaching

AbstractIn this study, the effect of ammonium citrate (AC) on the leaching of low grade zinc oxide ore in the 5

Extraction of low-grade silver from a refractory Au-Ag ore in cyanidation by pretreatment with reductive alkaline leaching

2016 ◽  
Vol 164 ◽  
pp. 257-264 ◽  
Author(s):  
Wei Li ◽  
Zhiqiang Liu ◽  
Qingyuan Huang ◽  
Yali Tang ◽  
Xianyang Qiu
Keyword(s):  
Low Grade ◽  
Alkaline Leaching

Alkaline Leaching of Low Grade Complex Zinc Oxide Ore

2010 ◽  
Vol 158 ◽  
pp. 12-17 ◽  
Author(s):  
Shao Jian Ma ◽  
Jin Lin Yang ◽  
Gui Fang Wang ◽  
Wei Mo ◽  
Xiu Juan Su
Keyword(s):  
Zinc Oxide ◽  
Metal Oxide ◽  
Ammonium Chloride ◽  
Ammonium Carbonate ◽  
Preliminary Investigation ◽  
Low Grade ◽  
Leaching Rate ◽  
Alkaline Leaching ◽  
Solid Ratio ◽  
Zn Content

Alkaline leaching is an important way for treating low grade metal oxide ore, which has some advantages such as low corrosion and low pollution compared to acidic leaching. In order to recover the zinc from a low grade complex zinc oxide ore in which the grade of Zn and Fe are 13 wt.% and 40.2 wt.%, respectively, and 52.8% of Zn is contained in siderite, 34.63% in limonite and 11.55% in smithsonite, this paper presents a preliminary investigation of this type of ore by alkaline leaching method. In this study, ammonia-ammonium chloride and ammonia-ammonium carbonate were used as the leaching reagents. The effects of alkaline concentration, leaching time, leaching temperature and liquid to solid ratio (L/S) were studied, respectively. The results show that 43.15% of initial Zn content was extracted adopting ammonia-ammonium chloride as the leaching reagent in 4.5M at 30°C for 3h with a liquid to solid ratio of 4:1, while 43.07% of Zn recovery was achieved employing ammonia-ammonium carbonate as the leaching reagent at 5M, 30°C and 4:1(L/S). The low leaching rate of Zn is probably attributed to that the zinc contained in siderite was not extracted completely because Zn and Fe exist as isomorphism in siderite.

Manganese Extraction from Low-Grade Pyrolusite by Roasting with H2SO4

JOM ◽  
2018 ◽  
Vol 70 (10) ◽  
pp. 2008-2014 ◽  
Author(s):  
Fei Teng ◽  
Shaohua Luo ◽  
Wenning Mu ◽  
Xuefei Lei ◽  
Haixia Xin ◽  
...  
Keyword(s):  
Low Grade ◽  
Manganese Extraction
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