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Method for producing vanadium iron with stone-like coal pickle liquor

A kind of technology of vanadium ferroalloy and stone coal acid

Inactive Publication Date: 2011-04-06
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existing production process from stone coal to ferrovanadium has defects such as long operation process, large consumption of reagents, high production cost, and serious environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Vanadium (V 2 o 5 ) 7.3g / L leach solution 3600ml, according to NH 4 Al(SO 4 ) 2 12H 2 Adding 1.5 times the stoichiometric number of O crystal precipitation (NH 4 ) SO 4 , to remove aluminum by crystallization, and add CaCO to the liquid after crystallization 3 Neutralize until the pH value reaches 2.5 and filter, add NaClO to the filtrate at 65°C 3 Stir for 1 hour to precipitate precipitates, and filter the iron-vanadium compound filter cake obtained by adding 0.1mol / L dilute sulfuric acid solution at 80°C for 2 hours and filter at a liquid-solid ratio of 2:1, then add water to the filter cake at a liquid-solid ratio of 3:1 Control the pH value with ammonia at 9 room temperature, stir and wash for 1 hour, filter, dry the filter cake, remove the iron-vanadium compound of harmful impurities such as phosphorus, add aluminum particles containing more than 95% of Al according to 1.2 times its mass, and simultaneously press its mass Add 0.05 times of lime, 950 ° C red...

Embodiment 2

[0031] Vanadium-containing (V 2 o 5 ) 16.5g / L leachate 3100ml, add ammonia water to adjust the pH value to 0.5, crystallize and separate out aluminum ammonium sulfate NH 4 Al(SO 4 ) 2 12H 2 O crystals, add NaHCO to the solution after crystallization 3 Neutralize to a pH value of 3.5 to precipitate iron-vanadium compounds. The iron-vanadium compound filter cake obtained by filtering is first added with 0.3mol / L dilute hydrochloric acid solution at 60°C for 1.5 hours and filtered at a liquid-solid ratio of 1:1. Add water and ammonia at a ratio of 2:1 to control the pH value of 8. Stir and wash at room temperature for 1.5 hours, filter, dry the filter cake, and remove the iron-vanadium compound containing phosphorus and other harmful impurities. Add ferrosilicon containing Si75% according to 1.1 times its mass. 0.3 times of its mass is added with aluminum particles containing more than 95% Al, and according to the basicity of slag (CaO / SiO 2 Molar ratio) 2.1 Add lime, 1600 ...

Embodiment 3

[0033] Vanadium-containing (V 2 o 5 ) 1.6g / L leach solution 4500ml, according to NH 4 Al(SO 4 )2 12H 2 Adding 1.5 times the stoichiometric number of O crystal precipitation (NH 4 ) SO 4 , to remove aluminum by crystallization, and add CaCO to the liquid after crystallization 3 Neutralize to pH 2.5 and filter, then add NaHCO to the filtrate 3 Neutralize until the pH value is 5, add air and stir for 0.5 hours to precipitate precipitates, and filter the iron-vanadium compound filter cake obtained by adding 0.5mol / L dilute nitric acid solution at 40°C for 3 hours to filter according to the liquid-solid ratio of 0.8:1. Add water and ammonia at a liquid-solid ratio of 2:1 to control the pH value at 10, stir and wash at room temperature for 1 hour, filter, and dry the filter cake to remove harmful impurities such as phosphorus. Iron-vanadium compounds containing more than 95% of Al are added at 1.4 times their mass. At the same time, add lime according to 0.08 times its mass, ...

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PUM

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Abstract

The invention discloses a method for producing vanadium iron with stone-like coal pickle liquor. The process course comprises the steps of: adding ammonium (ammonia) into the stone-like coal pickle liquor to eliminate aluminum; neutralizing aluminum-eliminated liquid or oxidizing the aluminum-eliminated liquid and then neutralizing and precipitating a ferrovanadium compound; purifying the ferrovanadium compound and eliminating impurities of the ferrovanadium compound; reducing and smelting the ferrovanadium compound to produce the ferrovanadium, and the like. The invention has simple and short process flow, less reagent consumption, low production cost, favorable product quality and friendly environment and is easy for realizing industrial production.

Description

technical field [0001] The invention discloses a method for producing vanadium-iron alloy from stone coal acid leaching solution. Background technique [0002] Vanadium is an important alloying element. Adding vanadium to alloy steel can refine the structure and grain of the steel, and significantly improve the performance of the steel. Vanadium in alloy steel is usually added in the form of ferrovanadium. At present, there are two main methods of ferrovanadium production: the aluminothermic method and the electrosilicon thermal method. The thermite method is based on flake vanadium pentoxide (V 2 o 5 ) or low-priced vanadium oxide as raw material, using aluminum beans or aluminum grains as reducing agent, carrying out reduction smelting under alkaline conditions to obtain ferrovanadium; the electric silicon thermal method is also flake vanadium pentoxide as raw material, using 75% ferrosilicon And a small amount of aluminum as a reducing agent, in an electric arc furna...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B3/46C22B34/22
CPCY02P10/20
Inventor 王明玉王学文
Owner CENT SOUTH UNIV
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