Method for extracting valuable metal elements in niobium-tantalum ore

A technology of metal elements, niobium and tantalum, applied in the field of decomposition and extraction of niobium and tantalum ore, to achieve huge environmental benefits, improve utilization rate, and avoid environmental hazards

Inactive Publication Date: 2015-07-01
有研科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at overcoming the deficiency of existing niobium-tantalum ore decomposing and extracting niobium-tantalum process technology, the present invention provides a method for extracting valuable metal elements in niobium-tantalum ore, such as niobium, tantalum, yttrium, cerium, etc.

Method used

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  • Method for extracting valuable metal elements in niobium-tantalum ore

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Process flow like figure 1 As shown, 100g of a certain niobium-tantalum ore (the main chemical components are shown in Table 1), 200g of concentrated sulfuric acid (content 98%), and 50g of potassium hydrogen sulfate are blended and mixed uniformly, and then put into a muffle furnace for roasting and controlled roasting The temperature is 300°C, and the firing time is 2h. After calcination, the obtained material was added to the sulfuric acid solution (10wt%), the solid-liquid ratio was 1:3, stirred at 30°C for 1h, filtered and washed. The filtrate was transferred to a volumetric flask for constant volume, and the content of niobium, tantalum and rare earth elements was detected.

[0029] After calculation, the leaching rate of niobium is 95.1%, the leaching rate of tantalum is 94.8%, and the leaching rate of rare earth elements is 99.2%.

[0030] Table 1. Composition of a certain niobium and tantalum ore, wt%

[0031]

Embodiment 2

[0033] A certain raw niobium tantalum ore (the main chemical composition is shown in Table 1) 100g, concentrated sulfuric acid (content 98%) 100g and potassium hydrogen sulfate 100g are mixed and mixed uniformly, put into the muffle furnace for roasting, and the roasting temperature is controlled to 400 ℃, the roasting time is 2h. After calcination, the obtained material was added to the sulfuric acid solution (10wt%), the solid-liquid ratio was 1:4, stirred at 50°C for 1h, filtered and washed. The filtrate was transferred to a volumetric flask for constant volume, and the content of niobium, tantalum and rare earth elements was detected.

[0034] After calculation, the leaching rate of niobium is 95.5%, that of tantalum is 95.8%, and that of rare earth elements is 99.3%.

Embodiment 3

[0036] A certain raw niobium tantalum ore (the main chemical composition is shown in Table 1) 100g, concentrated sulfuric acid (content 98%) 50g and potassium hydrogen sulfate 200g are mixed and mixed uniformly, put into the muffle furnace for roasting, and the roasting temperature is controlled to 500 ℃, the roasting time is 3h. After calcination, the obtained material was added to the sulfuric acid solution (20wt%) with a solid-liquid ratio of 1:5, stirred at 70°C for 2h, filtered and washed. The filtrate was transferred to a volumetric flask for constant volume, and the content of niobium, tantalum and rare earth elements was detected.

[0037] After calculation, the leaching rate of niobium is 97.1%, the leaching rate of tantalum is 96.3%, and the leaching rate of rare earth elements is 99.0%.

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Abstract

The invention provides a method for extracting valuable metal elements in niobium-tantalum ore. The method comprises the following steps: (1) grinding the niobium-tantalum ore till the particle size is -200 to -500 meshes, and batching according to the mass ratio of the niobium-tantalum ore to concentrated sulfuric acid to disulfate being 1: (0.1-4):(0.1-4); (2) uniformly blending, and baking for 1-5 hours at the temperature of 200-800 DEG C to obtain a baked material; and (3) pickling the material obtained in the step (2) in sulfuric acid at the temperature of 30-100 DEG C, filtering, washing, and enabling niobium, tantalum and rare earth to enter a solution, wherein the concentration of the sulfuric acid is 0-40wt%, the leaching time is 1-4 hours. The method has the advantages that niobium, tantalum and rare earth elements are extracted simultaneously and efficiently, the leaching efficiency of the niobium and tantalum is above 95%, and the leaching efficiency of the rare earth element is approximate to 100%. The method is easy to operate and pollution-free and meets the requirements of environment-friendly metallurgy for cleaning production.

Description

Technical field [0001] The present invention relates to the decomposition and extraction of niobium-tantalum ore. Specifically, the present invention relates to a method for extracting valuable metal elements in niobium-tantalum ore. Background technique [0002] The rare metal niobium and tantalum and its compounds have excellent high temperature resistance, corrosion resistance and good processing properties. In addition to being widely used in steel, electronics, aerospace, low temperature superconductivity and nuclear industries, they have been The application of information industry and microelectronics technology has also been expanded. With the gradual expansion of the application of niobium and tantalum products, the market demand for niobium and tantalum products has also continued to increase, making the R&D and production of high-tech products such as niobium and tantalum enter a new period of growth. This provides a good opportunity for the development of niobium and...

Claims

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Application Information

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IPC IPC(8): C22B1/06C22B3/08C22B59/00C22B34/24
CPCY02P10/20
Inventor 高文成温建康武彪尚鹤
Owner 有研科技集团有限公司
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