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Vanadium extracting method

An extraction method and technology of vanadium slag, applied in the field of vanadium extraction, can solve the problem that vanadium resources have not been recycled

Inactive Publication Date: 2012-07-04
SICHUAN DAZHOU IRON & STEEL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The vanadium slag produced in the smelting process, especially the vanadium-containing blast furnace slag (V 2 o 5 content of 0.2%-0.3%) is usually treated as waste, and the vanadium resources contained in these vanadium slags have not been well recycled

Method used

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Comparison scheme
Effect test

Embodiment 1

[0043] After 1000kg of vanadium-containing blast furnace slag is added with 60kg of sodium chloride and mixed evenly, the residence time in the tunnel kiln is 50h, and it is roasted at 800°C for 8 hours; the aqueous leaching of the solid mixture after roasting adopts filling heap leaching method, the specific method is as follows: before charging, first fill the tank with a dilute vanadium aqueous solution of about 1m 3 In order to protect the filter layer; after loading, the sprinkler nozzle starts to spray hot dilute vanadium aqueous solution to the material column; the liquid output of the bottom outlet pipe is 1m per hour 3 , to get 85LNaVO 3 A leach solution with a concentration of 15g / L. Add a small amount of solid sodium carbonate to the leaching solution to adjust the pH value to 10, stir in the reactor for a period of time, pour it into a hopper with a filter cloth and a solution collector at the bottom, and filter to obtain 85L of filtrate; add a small amount of mag...

Embodiment 2

[0045] After 1000kg of vanadium-containing blast furnace slag is added with 50kg of sodium chloride and mixed evenly, the residence time in the tunnel kiln is 50h, and it is roasted under the firing zone of 800°C for 8 hours; the aqueous leaching of the solid mixture after roasting adopts filling heap leaching method, the specific method is as follows: before charging, first fill the tank with a dilute vanadium aqueous solution of about 1m 3 In order to protect the filter layer; after loading, the sprinkler nozzle starts to spray hot dilute vanadium aqueous solution to the material column; the liquid output of the bottom outlet pipe is 1m per hour 3 , get 80LNaVO 3 A leach solution with a concentration of 15g / L. Add a small amount of solid sodium carbonate to the leaching solution to adjust the pH value to 10, stir in the reactor for a period of time, pour it into a hopper with a filter cloth and a solution collector at the bottom, and filter to obtain 80L of filtrate; add a ...

Embodiment 3

[0047] After 1000kg of vanadium-containing blast furnace slag is added with 60kg of sodium chloride and mixed evenly, the residence time in the tunnel kiln is 50h, and it is roasted under the firing zone of 1000°C for 8 hours; the aqueous leaching of the solid mixture after roasting adopts filling heap leaching method, the specific method is as follows: before charging, first fill the tank with a dilute vanadium aqueous solution of about 1m 3 In order to protect the filter layer; after loading, the sprinkler nozzle starts to spray hot dilute vanadium aqueous solution to the material column; the liquid output of the bottom outlet pipe is 1m per hour 3 , to get 90LNaVO 3 A leach solution with a concentration of 15g / L. Add a small amount of solid sodium carbonate to the leaching solution to adjust the pH value to 10, stir in the reactor for a period of time, pour it into a hopper with a filter cloth and a solution collector at the bottom, and filter to obtain 90L of filtrate; ad...

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Abstract

The invention discloses a vanadium extracting method, which comprises the following steps that: vanadium slag is adopted as a raw material, and the vanadium slag is subjected to sodium-salt-added roasting, water leaching and impurity removing so as to obtain a sodium metavanadate solution; the obtained sodium metavanadate solution is subjected to adjusting acid, adding ammonium salt to precipitate vanadium and filtering so as to obtain poly ammonium vanadate; and the obtained poly ammonium vanadate is prepared into V2O5 powder through thermal decomposition. According to the vanadium extracting method disclosed by the invention, a vanadium resource in the vanadium slag can be effectively recycled.

Description

technical field [0001] The invention relates to a metal extraction method, in particular to a vanadium extraction method. Background technique [0002] As an important metal, vanadium itself and its compounds are widely used in many fields such as iron and steel, non-ferrous metals, chemical industry, alloys, superconducting materials, and automobile industry. Pure vanadium metal is mainly obtained by high-temperature reduction of vanadium pentoxide extracted from ore with metallic calcium. Currently refining V 2 o 5 The method is mainly to extract from vanadium-titanium magnetite. Since the main component of vanadium-titanium magnetite is Fe 3 o 4 , in the process of producing pig iron, most of the vanadium resources contained in the ore will enter the pig iron during the blast furnace reduction smelting process, and at this time, a small part of the vanadium resources will enter the remaining blast furnace slag, namely the vanadium-containing blast furnace slag. More...

Claims

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Application Information

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IPC IPC(8): C22B34/22C22B7/04
CPCY02P10/20
Inventor 刘顺明邓孝天汪洋张琦
Owner SICHUAN DAZHOU IRON & STEEL GROUP
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