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Raw material for vanadium extraction by calcification roasting and method for extracting vanadium

A technology for calcification roasting and roasting clinker, applied in vanadium oxide, process efficiency improvement and other directions, can solve the problems of high calcium and high phosphorus vanadium slag lack of efficient vanadium extraction methods, etc., and achieves easy implementation, short process flow and low investment. Effect

Active Publication Date: 2021-04-06
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide calcified roasting vanadium extraction raw materials and its vanadium extraction method to solve the problem of lack of efficient vanadium extraction methods for high calcium and high phosphorus vanadium slag

Method used

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  • Raw material for vanadium extraction by calcification roasting and method for extracting vanadium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Embodiment 1 adopts raw material of the present invention and method to extract vanadium

[0094] The high calcium and high phosphorus vanadium slag (V 2 o 5 =15.33%, CaO=25.52%, P=0.78%, common vanadium slag (V 2 o 5 =14.50%, CaO=2.15%, P=0.04%), limestone (CaO=54.2%) is finely ground to a particle size of less than 0.12mm, according to 50:50:4 (based on the amount of CaO added externally, the mass ratio is 50:50 : 2.2) After mixing evenly, place it in a muffle furnace with air, heat it to 890°C and keep it for 90 minutes, take it out and cool it down to 0.12mm or less.

[0095] Take 100g of the clinker after sample preparation for acid leaching (first-stage leaching), 300mL of mother liquor, control the pH of the system with sulfuric acid to 3.0-3.2 under stirring conditions, and leaching for 45min at a temperature of 55°C, add to the first leaching solution 0.5g of polymerized ferric sulfate (the first stage of phosphorus removal), and then stirred for 5 minutes ...

Embodiment 2

[0103] Embodiment 2 adopts raw material and method of the present invention to extract vanadium

[0104] The high calcium and high phosphorus vanadium slag (V 2 o 5 =14.28%, CaO=28.77%, P=0.95%), common vanadium slag (V 2 o 5 =24.50%, CaO=2.56%, P=0.04%), limestone (CaO=54.2%) is ground until the particle size is less than 0.12mm, according to 40:60:3.5 (based on the amount of CaO added externally, the mass ratio is 40:60 : 1.9) after mixing evenly, place it in a muffle furnace with air, heat it to 900°C and keep it for 60 minutes, take it out and cool it down to 0.12mm or less.

[0105] Take 100g of clinker after sample preparation for acid leaching (first-stage leaching), 300mL of mother liquor, use sulfuric acid to control the system pH=3.0-3.3 under stirring conditions, and leaching for 60min at a temperature of 68°C, add 0.65g of polymerized ferric sulfate (the first stage of phosphorus removal), and then stirred for 10 minutes to separate the liquid and solid to obtain...

Embodiment 3

[0113] Embodiment 3 adopts raw material and method of the present invention to extract vanadium

[0114] The high calcium and high phosphorus vanadium slag (V 2 o 5 =10.17%, CaO=36.08%, P=1.32%), ordinary vanadium slag (V 2 o 5 =18.54%, CaO=2.22%, P=0.04%), limestone (CaO=54.2%) is ground until the particle size is less than 0.12mm, according to 20:80:9.4 (based on the amount of CaO added externally, the mass ratio is 20:80 : 5.1) After mixing evenly, place it in a muffle furnace with air, heat it to 900°C and keep it for 60 minutes, take it out and cool it to make a sample below 0.12mm.

[0115] Take 100g of clinker after sample preparation for acid leaching (first-stage leaching), 300mL of mother liquor, control system pH=3.2-3.5 with sulfuric acid under stirring condition, and leaching for 60min at 45°C, add to the first leaching solution 0.4g of polymerized ferric sulfate (the first stage of phosphorus removal), and then stirred for 5 minutes, liquid-solid separation t...

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Abstract

The invention relates to a raw material for vanadium extraction by calcification roasting and a method for extracting vanadium, and belongs to the field of vanadium oxide preparation. What the present invention aims to solve is the lack of efficient methods for extracting vanadium from high-calcium and high-phosphorus vanadium slag. -60 parts, 38-80 parts of ordinary vanadium slag, 1-18 parts of external CaO; wherein, V in the high-calcium and high-phosphorus vanadium slag 2 o 5 content of 9%-25%, CaO content of 15%-50%, P content of 0.7%-2%; V in the common vanadium slag 2 o 5 The content of CaO is 9%-25%, the content of CaO is 1%-3%, and the content of P is 0.03%-0.06%. The invention can use high-calcium and high-phosphorus vanadium slag as raw materials to prepare vanadium pentoxide products meeting industry standards, has a high recovery rate of vanadium, and is easy to implement.

Description

technical field [0001] The invention relates to a raw material for vanadium extraction by calcification roasting and a method for extracting vanadium, and belongs to the field of vanadium oxide preparation. Background technique [0002] Vanadium-titanium magnetite is subjected to high temperature treatment in blast furnace or electric furnace to obtain vanadium-containing molten iron, and vanadium slag is selectively oxidized from molten iron. It is then further blown into qualified molten steel, which is currently the mainstream vanadium extraction-steelmaking method. [0003] In recent years, as users have increasingly stringent requirements on steel performance, high-quality steel requires P≤0.015wt%, and aerospace low-temperature steel pipes and tinplates require P≤0.01wt%. If vanadium-titanium magnetite is used for smelting, the P content in molten iron is usually high, ranging from 0.06wt% to 0.08wt%. The P in steel is still as high as 0.060wt%-0.090wt%. If only deph...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02C22B34/22C22B7/04C01G31/02
CPCC01G31/02C22B1/02C22B7/04C22B34/22Y02P10/20
Inventor 何文艺彭毅陈燕叶露
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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