CN101440429A

CN101440429A - Method for decomposing ore concentrate containing tantalum, niobium and rare-earth element

Info

Publication number: CN101440429A
Application number: CNA2008102201226A
Authority: CN
Inventors: 刘志强; 陈怀杰; 梁振锋; 冯雅清
Original assignee: 广州有色金属研究院; 内蒙古扎鲁特旗鲁安矿业有限公司
Priority date: 2008-12-18
Filing date: 2008-12-18
Publication date: 2009-05-27
Also published as: CN101440429B

Abstract

The invention relates to a method for decomposing a concentrated ore containing tantalum, niobium and rare-earth elements, which is characterized by comprising the following steps: evenly mixing the concentrated ore containing the tantalum, niobium and rare-earth elements, concentrated sulfuric acid and sulfate according to a weight ratio of 1:0.8-2.5:0.8:1.5, roasting the mixture for 0.5 to 8 hours at a temperature of between 180 and 400 DEG C; adding water into the mixture after roasting, stirring the mixture for 0.5 to 3 hours at a temperature of between 20 and 80 DEG C; and filtering and washing the mixture, wherein the tantalum, the niobium and the rare-earth elements enter the solution. The method decomposes the tantalum, the niobium and the rare-earth elements, and improves leaching rate of the tantalum and the niobium at the same time, wherein the leaching rate of the rare-earth elements reaches more than 90 percent, and the method prepares for next separation.

Description

A kind of decomposition method of ore concentrate containing tantalum, niobium and rare-earth element

Technical field

The present invention relates to a kind of decomposition method of rare earth element concentrate, relate in particular to a kind of decomposition method of ore concentrate containing tantalum, niobium and rare-earth element.

Background technology

Consumption day by day along with the rare earth element resource, complicated association rare earth element resource needs comprehensive development and utilization, contain rare metal tantalum, niobium etc. in many association rare earth element resources, adopt beneficiation method effectively tantalum, niobium not to be separated fully with rare earth element, also contain a spot of tantalum, niobium in the rare earth element concentrate, be about 0.5～40%.

" niobium and tantalum " (A. В .E Л Ю т И Н etc. work, press of Zhongnan Polytechnic Univ, P52～P66) summarized and following method mainly adopted in the research of handling ore concentrate containing tantalum, niobium and rare-earth element both at home and abroad at present: 1. hydrofluoric acid decomposition method.Adopt hydrofluoric acid leaching tantalum, niobium to extract and extract tantalum, niobium, rare earth element does not dissolve and is retained in the leached mud, and the leached mud that will contain rare earth element again decomposes, and extracts rare earth element.Because tantalum, content of niobium are low, need to consume a large amount of hydrofluoric acid, but also need separately leached mud is handled to extract rare earth element, complex process; 2. concentrated sulfuric acid roasting method.Adopt the vitriol oil and add ammonium sulfate or sodium sulfate comes roasted concentrate, carry out water logging again, tantalum, niobium vitriol are water-soluble, and tantalum, niobium are extracted in extraction.Because rare earth element and ammonium sulfate form water-fast rare earth element sulfuric acid double salt and are retained in the water logging slag, again the water logging slag are decomposed the extraction rare earth element.The same existence of this method need be carried out disaggregating treatment, complex process respectively with tantalum, niobium and rare earth element.

Summary of the invention

The object of the present invention is to provide a kind of method that can simultaneously tantalum, niobium and rare-earth element be decomposed.

The decomposition method of ore concentrate containing tantalum, niobium and rare-earth element of the present invention is as follows: by ore concentrate containing tantalum, niobium and rare-earth element: the vitriol oil: the weight ratio of vitriol is 1: 0.8～2.5: 0.8～1.5 to mix, roasting, maturing temperature is 180～400 ℃, roasting time is 0.5～8 hour, add water after the roasting, 20～80 ℃ of following stirred for several 0.5～3 hour, filter, washing, tantalum, niobium and rare earth element enter filtrate.

Described vitriol is magnesium sulfate heptahydrate, sal epsom, Strontium Sulphate or zinc sulfate.

Method employing of the present invention contains tantalum, niobium and rare-earth element concentrate and the vitriol oil and vitriol carries out the roasting decomposition, water leaches tantalum, niobium and rare earth element, under the situation that guarantees the rare earth element leaching yield, can improve tantalum, niobium leaching yield and rare earth element leaching yield simultaneously and reach more than 90%, for next step separation is prepared.

Embodiment

Embodiment 1

Ore concentrate containing tantalum, niobium and rare-earth element (main chemical compositions is as shown in table 1) 100g and the 187g vitriol oil (content 98%) and 100g magnesium sulfate heptahydrate are mixed, and the control maturing temperature is 180 ℃, roasting time 8 hours; After the roasting calcining matter is added in the entry, stirred 2 hours down, filter, wash at 40 ℃; Tantalum, niobium and rare earth element enter filter solution, the about 1L of solution, and tantalum, niobium and ree content in the analytical solution, rare earth oxide (REO) is 22.42g/L, Nb ₂O ₅Be 2.61g/L, Ta ₂O ₅Be 0.12g/L, as calculated, tantalum, niobium leaching yield reach 87%, and the rare earth element leaching yield reaches 96%.

Table 1 rare earth element concentrate component and content (%)

Embodiment 2

Table 1 described rare earth element concentrate 100g and the 240g vitriol oil (content 98%) and 80g magnesium sulfate heptahydrate are mixed, and the control maturing temperature is 350 ℃, roasting time 0.5 hour; After the roasting calcining matter is added in the entry, stirred 2 hours down, filter, wash at 75 ℃; Tantalum, niobium and rare earth element enter solution, the about 1L of solution, and tantalum, niobium and ree content in the analytical solution, REO are 21.94g/L, Nb ₂O ₅Be 2.58g/L, Ta ₂O ₅Be 0.11g/L, as calculated, tantalum, niobium leaching yield reach 86%, and the rare earth element leaching yield reaches 94%.

Embodiment 3

Table 1 described rare earth element concentrate 100g and the 240g vitriol oil (content 98%) and 80g sal epsom are mixed, and the control maturing temperature is 350 ℃, roasting time 0.5 hour; After the roasting calcining matter is added in the entry, stirred 2 hours down, filter, wash at 75 ℃; Tantalum, niobium and rare earth element enter solution, the about 1L of solution, and tantalum, niobium and ree content in the analytical solution, REO are 21.72g/L, Nb ₂O ₅Be 2.42g/L, Ta ₂O ₅Be 0.105g/L, as calculated, tantalum, niobium leaching yield reach 80%, and the rare earth element leaching yield reaches 93%.

Embodiment 4

Ore concentrate containing tantalum, niobium and rare-earth element (main chemical compositions is as shown in table 2) 100g and the 187g vitriol oil (content 98%) and 150g magnesium sulfate heptahydrate are mixed, and the control maturing temperature is 250 ℃, roasting time 6 hours; After the roasting calcining matter is added in the entry, stirred 3 hours down, filter, wash at 30 ℃; Rare earth element, tantalum, niobium enter solution, and solution is 900mL, and analytical solution middle-weight rare earths element, tantalum, content of niobium, REO are 30.98g/L, Nb ₂O ₅Be 7.00g/L, Ta ₂O ₅Be 1.13g/L, as calculated, tantalum, niobium leaching yield reach 90%, and the rare earth element leaching yield reaches 97%.

Table 2 rare earth element concentrate component and content (%)

Embodiment 5

Ore concentrate containing tantalum, niobium and rare-earth element (main chemical compositions is as shown in table 2) 100g and the 187g vitriol oil (content 98%) and 150g Strontium Sulphate are mixed, and the control maturing temperature is 250 ℃, roasting time 6 hours; After the roasting calcining matter is added in the entry, stirred 3 hours down, filter, wash at 30 ℃; Rare earth element, tantalum, niobium enter solution, and solution is 900mL, and analytical solution middle-weight rare earths element, tantalum, content of niobium, REO are 31.90g/L, Nb ₂O ₅Be 7.07g/L, Ta ₂O ₅Be 1.15g/L, as calculated, tantalum, niobium leaching yield reach 90%, and the rare earth element leaching yield reaches 99%.

Embodiment 6

Ore concentrate containing tantalum, niobium and rare-earth element (main chemical compositions is as shown in table 2) 100g and the 187g vitriol oil (content 98%) and 140g zinc sulfate are mixed, and the control maturing temperature is 230 ℃, roasting time 2 hours; After the roasting calcining matter is added in the entry, stirred 3 hours down, filter, wash at 30 ℃; Rare earth element, tantalum, niobium enter solution, and solution is 1000mL, and analytical solution middle-weight rare earths element, tantalum, content of niobium, REO are 27.31g/L, Nb ₂O ₅Be 5.95g/L, Ta ₂O ₅Be 0.972g/L, as calculated, tantalum, niobium leaching yield reach 85%, and the rare earth element leaching yield reaches 95%.

Claims

1. the decomposition method of an ore concentrate containing tantalum, niobium and rare-earth element, it is characterized in that by ore concentrate containing tantalum, niobium and rare-earth element: the vitriol oil: the weight ratio of vitriol is 1: 0.8～2.5: 0.8～1.5 to mix, roasting, maturing temperature is 180～400 ℃, roasting time was 0.5～8 hour, adds water after the roasting, 20～80 ℃ of following stirred for several 0.5～3 hour, filter, wash, tantalum, niobium and rare earth element enter solution.

2. the decomposition method of ore concentrate containing tantalum, niobium and rare-earth element according to claim 1 is characterized in that described vitriol is magnesium sulfate heptahydrate, sal epsom, Strontium Sulphate or zinc sulfate.