low grade ore tantalite

Leaching of a low-grade niobium–tantalum ore by highly ...

For a low-grade ore a new process for the decomposition has been proposed by Wang et al. (2009), and Zhou et al. (2005) using highly concentrated caustic …

Leaching of a low-grade niobium–tantalum ore by highly ...

2005-11-1 · Leaching of a low-grade niobium–tantalum ore by a highly concentrated caustic potash solution was found to be an effective way for the dissolution of niobium and tantalum. The optimum leaching conditions were obtained by mixing the finely ground ore (− 61 μm) with 84 wt.% KOH solution in a mass ratio of alkali to ore of 7 : 1 at 300 °C ...

Leaching of niobium and tantalum from a low-grade ore ...

A new process is proposed for the leaching and recovery of niobium and tantalum from a low-grade refractory niobium–tantalum ore after adding pure Nb2O5 to adjust the niobium to tantalum ratio.

A kinetic study of the leaching of a low-grade niobium ...

2005-12-1 · 2005-12-1 · A kinetic study of the leaching of a low-grade niobium–tantalum ore by concentrated KOH solution under atmospheric pressure has been investigated. The effects of reaction temperature, KOH concentration, agitation speed, particle size and alkali-to-ore mass ratio on the dissolution rate of niobium were examined.

A kinetic study of the leaching of a low-grade niobium ...

The recovery of Nb and Ta from a low grade ore was also studied by Zhou et al. (2005a) using concentrated KOH under atmospheric pressure. More recently, a …

Orion Assets LTD

Orion Assets LTD - United Kingdom supplier of tin ore, tantalite, columbite, gold, niobium, gemstones, coloured, tourmaline. ... Sell Low Grade Aqua Berylium Supply Available. Sell Tantalite,niobium,tin ore. Send an Inquiry to this supplier. Send an Inquiry to …

Leaching of niobium and tantalum from a low-grade ore ...

2013-12-5 · Leaching of niobium and tantalum from a low-grade ore using a KOH roast–water leach system Xiaohui Wanga,b,c, Shili Zhenga,b,⁎, Hongbin Xua,b, Yi Zhanga,b a National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, PR China b Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese …

Leaching of a low-grade niobium–tantalum ore by highly ...

The recovery of niobium and tantalum from a low-grade niobium–tantalum ore by using highly concentrated caustic potash as an alternative to hydrofluoric acid has been investigated. Experiments on the leaching behavior of niobium and tantalum, as well as other associated impurities, such as titanium, iron, manganese, silicon, and aluminum were ...

(PDF) An investigation on flotation process of low-grade ...

It was o bserved that the o re was a low grade Nb-Ta ore constituting 0 .01% Nb and 0.04% Ta interlocked in 32 .42% Si matrix together with ot her gangue minerals such as Al, Na, K, Fe and

Investigation of Dissolution Kinetics of A Nigerian ...

2013-12-24 · Low-grade tin slags, however, might first be treated by a pyrometallurgical technique to upgrade them to a synthetic concentrate before delivery [5]. Consequently, tantalite is the most important mineral form of tantalum, a speciality

Leaching of niobium and tantalum from a low-grade ore ...

A new process is proposed for the leaching and recovery of niobium and tantalum from a low-grade refractory niobium–tantalum ore after adding pure Nb2O5 to …

Extract Tantalum & Niobium from Pegmatites

2013-12-5 · Leaching of niobium and tantalum from a low-grade ore using a KOH roast–water leach system Xiaohui Wanga,b,c, Shili Zhenga,b,⁎, Hongbin Xua,b, Yi Zhanga,b a National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, PR China b Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese …

(PDF) Beneficiation and Separation of Egyptian Tantalite Ore

a tantalite ore in which the tantalum content is three times more than the niobium content [4]. ... Thus, the ores are classified as low-grade, micro-fine, and refractory tantalum–niobium ores ...