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Process of extracting vanadium pentoxide from coal gangue

A technology of vanadium pentoxide and stone coal mines, applied in the direction of vanadium oxide, etc., can solve the problem of insufficient purity and achieve the effects of high product purity, simplified process and low production cost

Inactive Publication Date: 2007-11-07
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the technical scheme has carried out vanadium liquid purification and adjusted the pH value to 2.0-3.0 before entering the ion exchange column, the eluent has adopted sodium hydroxide, and the obtained V 2 o 5 Purity is still not high enough

Method used

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  • Process of extracting vanadium pentoxide from coal gangue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 120g of calcium oxide (CaO ≥ 90%) and 100g of anthracite (C ≥ 80%) to 2000g of dry stone coal, grind and mix evenly, add 200g of water to make pellets, the diameter of which is about 20mm, and place them in the air to dry naturally Then put it into a high-temperature furnace connected to the air for roasting, the roasting temperature is 980°C, and the roasting time is 3 hours to obtain cooked balls, take out the cooked balls and place them in the air to cool to room temperature, divide them into two parts on average, and record them as cooked balls I and cooked balls respectively. Ball II. Soak cooked balls I with 1060g of sulfuric acid solution with a concentration of 10%. After soaking for 48 hours, soak cooked balls II with the obtained leachate until the pH value of the leachate reaches 1.5, filter, and the filtrate is ion-exchanged with AMBERLITE IRA96RF anion exchange resin, resin adsorption After saturation, use 1.5mol / L NH 4 Cl and 0.2mol / L NH 3 ·H 2 O mi...

Embodiment 2

[0038] Add 160g of calcium oxide (CaO ≥ 90%) and 200g of anthracite (C ≥ 80%) to 2000g of dry stone coal, grind and mix evenly, add 260g of water to make pellets, the diameter of which is about 15mm, and place them in the air to dry naturally Then put it into a high-temperature furnace connected to the air for roasting, the roasting temperature is 950°C, and the roasting time is 4 hours to obtain cooked balls, take out the cooked balls and cool them to room temperature in the air, divide them into two parts on average, and record them as cooked balls I and cooked balls respectively. Ball II. Use 1060g of sulfuric acid solution with a concentration of 15% to soak cooked balls I, soak for 48 hours, then soak cooked balls II with the obtained leachate until the pH value of the leachate reaches 2.0, filter, and the filtrate is ion-exchanged with AMBERLITE IRA96CRF anion exchange resin. After the adsorption is saturated, use 2mol / L NH 4 Cl and 0.5mol / L NH 3 ·H 2 O mixed solution...

Embodiment 3

[0040] Add 300g of calcium oxide (CaO ≥ 90%) and 450g of anthracite (C ≥ 80%) to 3000g of dry stone coal, grind and mix evenly, add 450g of water to make pellets, the diameter of which is about 12mm, and place them in the air to dry naturally Then put it into a high-temperature furnace connected to the air for roasting. The roasting temperature is 960° C., and the roasting time is 5 hours to obtain cooked balls. The cooked balls are taken out and placed in the air to cool to room temperature. Ball II and Cooking Ball III. Soak cooked ball I with 2000g of sulfuric acid solution with a concentration of 20%, soak for 48 hours, then soak cooked ball II with the obtained leachate, and then soak cooked ball III after 24 hours, until the pH value of the leachate reaches 3.0, filter, and use AMBERLITE IRA96RF anion for the filtrate The exchange resin was used for ion exchange, and after the resin was saturated, 2.5mol / L NH 4 Cl and 0.8mol / L NH 3 ·H 2 O mixed solution for desorption...

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Abstract

The present invention relates to process of extracting vanadium pentoxide. The process includes the following five steps of: calcifying roasting, acid leaching, ion exchanging, depositing vanadium pentoxide, and roasting to eliminate ammonia. The process has the available of short production period, simple operation, high vanadium pentoxide product purity up to 99.0 % and low production cost, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a production method of vanadium pentoxide, in particular to a production method for extracting vanadium pentoxide from stone coal mines. Background technique [0002] Carbon-bearing shale (referred to as stone coal mine) in Hunan, Hubei, Zhejiang, Anhui and other provinces in my country has a proven reserve of 618.8×10 8 t, the grade of vanadium pentoxide is mostly between 0.3% and 1.0%. The total reserves of vanadium pentoxide are 117,690kt, accounting for more than 85% of the total reserves of vanadium in my country. The vanadium in stone coal mines in most areas is mainly The stable acid-base insoluble trivalent is the main one, so it is more difficult to improve the technology of vanadium pentoxide. [0003] The application number is CN90105503.4 and has reported the method for extracting vanadium pentoxide from vanadium ore, and this method vanadium leaching liquid adopts extraction technology, and method is complicated an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/02
Inventor 王金超王斌廖荣华边悟韩可喜穆天柱杨传刚曹乐为
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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