Acidic ammonium salt vanadium precipitation waste water recycling method

A technology for acidic ammonium salt vanadium precipitation and resource utilization, which is applied in the field of resource utilization of acidic ammonium salt vanadium precipitation wastewater, can solve the problems of high cost, complicated operation, and increased production cost of vanadium oxide, achieve qualified quality, and improve system yield , The clinker dipping process is smooth

Active Publication Date: 2015-10-21
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

This method requires multiple treatments of wastewater before it can be used in the leaching process. The operation is complicated and the cost is high.
[0006] Patent 102531221A mainly discloses the treatment method of vanadium precipitation wastewater, using a reducing agent to reduce the V of the wastewater 5+ 、Cr 6+ Reduce to low-priced vanadium chromium, adjust the pH value to alkaline, low-priced vanadium chromium is precipitated from the solution in the form of hydroxide and recovered; the main components of the mother liquor are sodium sulfate, ammonium sulfate, sodium chloride, ammonium chloride etc., with a salinity of about 10%, it is concentrated into a sat

Method used

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Examples

Experimental program
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Effect test

Example Embodiment

[0035] Example 1

[0036] Take 500g of vanadium extraction residue as sand filter medium, 10L of wastewater is pretreated by sand filter and mixed with 150L of condensed water, and 1L of mixed solution is heated to 90℃; 475g of vanadium slag powder containing 8% vanadium, 120g of sodium carbonate, sand 470g of the filtered vanadium extraction residue is mixed uniformly, the temperature is programmed (6°C / min), the highest roasting temperature is 780°C, and the roasting time is 150min. The clinker obtained by roasting is immersed in the prepared mixture for 30 minutes soaking time. The vanadium-containing leaching solution is added with 1.5g of calcium chloride to remove P, and 50g of ammonium sulfate is added for vanadium precipitation, and the end point pH of the precipitation is 2.0. After testing, the TV of the residue is 1.02%, SV is 0.08%, and the conversion rate of vanadium is 88.0%; TV content in APV is 49.2%, Na content is 0.36%, and S content is 0.24%, all of which meet ...

Example Embodiment

[0037] Example 2

[0038] Take 500g of vanadium extraction residue as sand filter medium, 10L of wastewater is pretreated by sand filter and mixed with 100L of condensed water, and 1L of mixed solution is heated to 90℃; 475g of vanadium slag powder containing 8.3% vanadium, 120g of sodium carbonate, sand 470g of the filtered vanadium extraction residue is mixed uniformly, the temperature is programmed (7°C / min), the maximum roasting temperature is 780°C, and the roasting time is 150min. The clinker obtained by roasting is immersed in the prepared mixture and the soaking time is 30min. The vanadium-containing leaching solution was added with 1.7g calcium chloride to remove P, and 45 ammonium sulfate was added for vanadium precipitation. The end point pH of the precipitation was 2.0. After testing, the TV of the residue is 1.01%, SV is 0.09%, and the conversion rate of vanadium is 88.3%. The TV content of APV is 48.8%, Na content is 0.41%, and S content is 0.26%, which all meet the...

Example Embodiment

[0039] Example 3

[0040] Take 500g of vanadium extraction residue as sand filter medium, 10L of wastewater is pretreated by sand filter and mixed with 70L of condensed water, and 1L of mixed solution is heated to 90℃; 475g of vanadium slag powder containing 8.4% vanadium, 120g of sodium carbonate, sand 470g of the filtered vanadium extraction residue is mixed uniformly, the temperature is programmed (7°C / min), the maximum roasting temperature is 780°C, and the roasting time is 150min. The clinker obtained by roasting is immersed in the prepared mixture and the soaking time is 30min. The vanadium-containing leaching solution was added with 1.8g calcium chloride to remove P, and 47 ammonium sulfate was added for vanadium precipitation. The pH value of the precipitation end point was 2.0. After testing, the TV of the residue was 1.02%, SV was 0.09%, and the conversion rate of vanadium was 87.8%. The TV content in APV is 48.6%, Na content is 0.49%, and S content is 0.28%, all of whi...

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Abstract

The invention relates to an acidic ammonium salt vanadium precipitation waste water recycling method, belongs to the field of metallurgy and aims to provide the acidic ammonium salt vanadium precipitation waste water recycling method. The acidic ammonium salt vanadium precipitation waste water recycling method comprises the following steps: a, partial ammonium salt vanadium precipitation waste water is subjected to vanadium-extraction tailing sand filtration, so that filtrate A is obtained; the rest ammonium salt vanadium precipitation waste water is subjected to heating evaporation concentration treatment, and after produced steam is cooled, condensate water is obtained; b, the filtrate A is mixed with condensate water, so that a mixed solution is obtained, and is returned to a vanadium extraction process. Compared with the conventional waste water treatment process, the method provided by the invention reduces waste water yield, reduces waste water treatment cost, recycles fine particles APV in the waste water and improves the system efficiency.

Description

technical field [0001] The invention relates to a resource utilization method of acidic ammonium salt vanadium precipitation wastewater, which belongs to the field of metallurgy. Background technique [0002] At present, there are two main production processes of vanadium oxide in the world. The raw materials include vanadium slag obtained from vanadium-containing minerals, vanadium-containing stone coal, spent catalysts, and petroleum cinders. One process is calcification roasting-acid leaching-hydrolysis vanadium precipitation (lime method for short). Another process is sodium roasting-leaching-ammonium salt precipitation vanadium (sodium salt method for short), the vanadium products produced by this process are of high quality and stable production. [0003] In the process of vanadium extraction by sodium salt method, vanadium needs to realize two transformations, one is the transformation of water-insoluble low-valence vanadium and water-soluble high-valence vanadium, a...

Claims

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Application Information

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IPC IPC(8): C02F9/10C22B7/00C22B34/22C02F103/16
Inventor 万龙飞李千文彭一村
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
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