Method for extracting vanadium from vanadium-containing ferrophosphor

A technology of vanadium-containing ferrophosphorus and vanadium-phosphorus ferrophosphorus, which is applied in the field of vanadium extraction of vanadium-containing ferrophosphorus, which can solve problems such as difficulties, loss of vanadium, high cost, etc., and achieve the effect of saving costs and process time

Inactive Publication Date: 2010-03-31
HONG JING ENVIRONMENT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Ferrophosphorus must be roasted with alkali under an oxidizing condition to convert vanadium into water-soluble salts, and a large amount of impurities (like phosphorus) will also become soluble during roasting, making the leachate a phosphorus-containing mixture. solution, which is difficult to extract high-purity vanadium
In addition, the cost of dephosphorization in the leaching solution is too high (such as freezing dephosphorization), and the amount of dephosphorization agent used is too large to cause vanadium to form Ca(VO3) 2 Precipitation causes a large loss of vanadium

Method used

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  • Method for extracting vanadium from vanadium-containing ferrophosphor

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Effect test

Embodiment 1

[0049] The product that present embodiment produces is vanadium pentoxide, and its step is as follows:

[0050] 1. Crush and grind the vanadium-containing ferrophosphorus, and mix it with Na 2 CO 3 Mix and granulate CaO with 0.1 times the weight of vanadium-containing ferrophosphorus, put the raw material after granulation into the rotary kiln, and roast at 600-700°C, the reaction time is 0.5 hours;

[0051] 2. Grind the roasted clinker by wet ball milling, and then transfer the ground slurry to the leaching tank;

[0052] 3. The water with a solid-to-liquid weight ratio of 1:3 to 4 is used for leaching in the leaching tank for 2 hours, and the temperature in the leaching tank is kept above 70°C to the non-boiling temperature;

[0053] 4. Filter the leached slurry, the leaching solution can obtain 51% vanadium of the vanadium content in the raw material, and the ratio of phosphorus and vanadium in the crude solution after filtering is P / V>0.1;

[0054] 5. Add magnesium chlo...

Embodiment 2

[0056] The product that present embodiment produces is vanadium pentoxide, and its step is as follows:

[0057] 1. Crush and grind vanadium-containing ferrophosphorus, and mix it with 3 times Na 2 CO 3 Mix and granulate CaO with 3 times of vanadium-containing ferrophosphorus, put the raw material after granulation into the rotary kiln, roast at 900-1100℃, and the reaction time is 5 hours;

[0058] 2. Grind the roasted clinker by wet ball milling, and then transfer the ground slurry to the leaching tank;

[0059] 3. The water with a solid-to-liquid weight ratio of 1:3 to 4 is used for leaching in the leaching tank for 2 hours, and the temperature in the leaching tank is kept above 70°C to the non-boiling temperature;

[0060] 4. Filter the leached slurry, 45% of the vanadium content in the raw material can be obtained in the leaching solution, and the ratio of phosphorus and vanadium in the crude solution after filtering is P / V≤0.05;

[0061] Step 5. is the same as in Exampl...

Embodiment 3

[0063] The product that present embodiment produces is vanadium pentoxide, and its step is as follows:

[0064] 1. Crush and grind vanadium-containing ferrophosphorus, and mix with 0.6 times Na 2 CO 3 and 0.6 times of CaO containing vanadium-phosphorus iron are evenly mixed and granulated, and the raw material after granulation is put into the rotary kiln, and roasted at 700-900 °C, and the reaction time is 2 hours;

[0065] 2. Grind the roasted clinker by wet ball milling, and then transfer the ground slurry to the leaching tank;

[0066] 3. The water with a solid-to-liquid weight ratio of 1:3 to 4 is used for leaching in the leaching tank for 2 hours, and the temperature in the leaching tank is kept above 70°C to the non-boiling temperature;

[0067] 4. Filter the leached slurry, 85.5% of the vanadium content in the raw material can be obtained in the leaching solution, and the ratio of phosphorus and vanadium in the crude solution after filtering is P / V≤0.05;

[0068] St...

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Abstract

The invention discloses a method for extracting vanadium from vanadium-containing ferrophosphor. In the method, vanadium-containing ferrophosphor is used as a raw material, and mixed with Na2CO3 and CaX (such as CaO) to be roasted at one time, the roasted product is leached in water, the leaching solution contains vanadium, a vanadium-containing fine solution is obtained after removing phosphor from the leaching solution with a phosphor-removing agent, and the fine solution is used to extract vanadium to obtain high-purity vanadium pentoxide. The method has the advantages that: the productionprocess is simple and free from coating; a lower ratio of phosphor to vanadium is achieved to reduce the loss of vanadium in the phosphor removal process; the production cost is low, and the investment is small; the method is suitable to extract vanadium from vanadium-containing ferrophosphor with different ingredients; and the leaching rate of the vanadium can reach 80 to 85 percent.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for extracting vanadium from ferrophosphorus containing vanadium. technical background [0002] In engineering materials, "vanadium" metal plays an indispensable and important role. Vanadium plays the role of deoxidation and defluorination in steel. Adding ferrovanadium to steelmaking alloys can improve the strength, hardness and ductility of steel. It is widely used, especially in high alloy steel, tool steel and carbon steel commonly used in the market. [0003] "Phosphorus" is a harmful impurity in the smelting of most steels, which will increase the brittleness of steel. Therefore, in the process of steelmaking, the requirements for phosphorus are more strictly controlled. [0004] The composition of common vanadium-containing ferrophosphorus generally contains 24-27% phosphorus, 5-9% vanadium, 3-5% chromium, 1-1.5% nickel, 0.2-0.5% silicon, and 50-55% iron. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C22B1/02C22B3/04C22B3/46
CPCY02P10/20
Inventor 孙玉龙蔡明哲刘永浩
Owner HONG JING ENVIRONMENT
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