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Method for sodium-modified roasting vanadium leaching

A sodium roasting and roasting technology is applied in the field of sodium roasting and vanadium leaching, which can solve the problems of insufficient reaction, difficult leaching, insufficient total alkali preparation, etc., and achieves the effect of preventing uneven batching of local materials and improving yield.

Inactive Publication Date: 2016-07-06
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the above method, due to the huge difference in the specific gravity of the two solid materials, soda ash and vanadium-iron concentrate, after adding soda ash and vanadium-iron concentrate in proportion, the two materials are very easy to separate, or the soda ash is pumped by the dust removal device. Go, resulting in insufficient alkali distribution of local materials, or insufficient total alkali distribution, resulting in insufficient roasting and sodiumization reaction, low conversion rate of clinker, difficult to leaching out, affecting the yield of sodiumized roasting and leaching vanadium

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1) 100 parts by weight of ferrovanadium concentrate (0.1mm in particle size, 4.5% by weight of iron content (calculated as MFe), and 17.30% by weight of vanadium content (calculated by vanadium pentoxide)), 24.8 parts by weight of sodium carbonate powder 100 parts by weight of immersion vanadium tailings (water content is 18% by weight, particle diameter is 0.1mm) and sodiumized roasting were mixed in the mixer for 15 minutes, and the mixture obtained was sent to 10 layers of multilayer roasting Roasting is carried out in the furnace, wherein the temperature of the 1-6 layers from the top to the bottom gradually rises from 200°C to 720°C (the temperature of the first layer is 200°C, the temperature of the second layer is 305°C, and the temperature of the third layer is 410°C, the temperature of the 4th layer is 515°C, the temperature of the 5th layer is 620°C, the temperature of the 6th layer is 720°C), the temperature of the 7th-10th layer is gradually decreased from 78...

Embodiment 2

[0046] 1) 100 parts by weight of ferrovanadium concentrate (particle size is 0.125mm, iron content (calculated as MFe) is 5% by weight, vanadium (TV) content is 17.30% by weight), 25.2 parts by weight of sodium carbonate powder and sodiumized roasting After 110 parts by weight of vanadium-immersed tailings (water content is 20% by weight and particle size is 0.15mm) are mixed in a mixer for 30 minutes, the obtained mixture is sent into a 10-layer multi-layer roaster for roasting, Among them, the temperature of 1-6 layers from top to bottom gradually rises from 200°C to 720°C (the temperature of the first layer is 200°C, the temperature of the second layer is 305°C, the temperature of the third layer is 410°C, and the temperature of the fourth layer is 410°C. The temperature of layer 515°C, the temperature of layer 5 is 620°C, the temperature of layer 6 is 720°C), the temperature of layer 7-10 gradually drops from 780°C to 650°C (the temperature of layer 7 is 780°C ℃, the tempe...

Embodiment 3

[0050] 1) 100 parts by weight of vanadium-iron ore concentrate (0.12mm in particle size, 4.8% by weight of iron content (calculated as MFe), and 17.30% by weight of vanadium content (calculated by vanadium pentoxide)), 25 parts by weight of sodium carbonate powder 105 parts by weight of leaching vanadium tailings (water content is 19% by weight, and particle diameter is 0.12mm) and sodiumized roasting were mixed in a mixer for 20 minutes, and the resulting mixture was sent to 10 layers of multilayer roasting Roasting is carried out in the furnace, wherein the temperature of the 1-6 layers from the top to the bottom gradually rises from 200°C to 720°C (the temperature of the first layer is 200°C, the temperature of the second layer is 305°C, and the temperature of the third layer is 410°C, the temperature of the 4th layer is 515°C, the temperature of the 5th layer is 620°C, the temperature of the 6th layer is 720°C), the temperature of the 7th-10th layer is gradually decreased f...

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Abstract

The invention discloses a method for sodium-modified roasting vanadium leaching. The method comprises the steps that 1, vanadium-iron concentrate, sodium salt and sodium-modified roasting vanadium leaching tailings are mixed for roasting, and sodium-modified roasting products are obtained; 2, the obtained sodium-modified roasting products are graded, and a graded sodium-modified roasting product A and a graded sodium-modified roasting product B are obtained, wherein the sodium-modified roasting product with the grain size of 0.2 mm or below in the graded sodium-modified roasting product A accounts for 90 wt% or above; and 3, the obtained graded sodium-modified roasting product A is subjected to solid-liquid separation after water leaching, and a vanadium containing solution is obtained, wherein relative to 100 parts by weight of vanadium-iron concentrate, the sodium salt accounts for 23-27 parts by weight, the sodium-modified roasting vanadium leaching tailings account for 70-130 parts by weight, and the water content of the sodium-modified roasting vanadium leaching tailings is 12 wt% or above. By means of the method, the yield of sodium-modified roasting vanadium leaching can be effectively increased.

Description

technical field [0001] The invention relates to a method for soaking vanadium by sodium roasting. Background technique [0002] At present, in terms of vanadium extraction, the vanadium-iron concentrate is mainly crushed, ground and sieved, and a certain amount of soda ash is added to the roaster for sodium roasting, and then the roasted vanadium-containing clinker is soaked. A vanadium-containing solution is obtained. [0003] However, in the above method, due to the huge difference in the specific gravity of the two solid materials, soda ash and vanadium-iron concentrate, after adding soda ash and vanadium-iron concentrate in proportion, the two materials are very easy to separate, or the soda ash is pumped by the dust removal device. Going away, resulting in insufficient alkali distribution of local materials, or insufficient total alkali distribution, resulting in insufficient roasting and sodiumization reaction, low conversion rate of clinker, difficult leaching out, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C22B1/02
Inventor 连忠华邓孝伯陈自清王小江李千文李大标彭一村王永刚
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM