Unlock instant, AI-driven research and patent intelligence for your innovation.

System and method for preparing ammonium metavanadate crystals

A technology of ammonium metavanadate and crystal, which is applied in the field of vanadium chemical industry, can solve the problems of clogged filter devices and ammonium metavanadate precipitation, etc., and achieve the effect of solving the problem of material blocking, speeding up the filtration speed and improving efficiency

Pending Publication Date: 2018-03-02
HEBEI IRON AND STEEL
View PDF1 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this device does not solve the problem of ammonium metavanadate precipitation clogging the filter device

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • System and method for preparing ammonium metavanadate crystals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The structural representation of the system for preparing ammonium metavanadate of the present embodiment is as figure 1 shown.

[0052] The system includes the following units connected in sequence: transfer reaction tank 1, horizontal filter press 2, filtrate buffer tank 3, heat exchanger 4, crystallizer 5, thickener 6, magma storage tank 7 and horizontal A filter press 8, wherein a mother liquid storage tank 9 is arranged between the thickener 6 and the horizontal filter press 8 for collecting the supernatant;

[0053] The outlet at the bottom of the transsolution reaction tank 1 is connected to the horizontal filter press 2 through a feeding pipe, and the upper outlet of the conversion reaction tank 1 is formed with the feeding pipe through a first return pipeline. circulation loop;

[0054] A second return line is provided between the horizontal filter press 2 and the first return line;

[0055] The aperture of the filter cloth of described horizontal filter pre...

Embodiment 2

[0064] The present embodiment adopts the system as described in embodiment 1 to carry out the preparation of ammonium metavanadate, and concrete steps are:

[0065] 1) Circulate the mixture of calcium vanadate transsolubilization solution and ammonium metavanadate solution at a temperature of 95°C in the transsolubilization reaction tank 1 in the first return line for 3 minutes, close the first return line, and open the second return line The slurry is maintained in a horizontal filter press 2 with a pore size of 15 μm for 2 minutes to form a filter cake layer, the second return line is closed, and the filtrate is collected in the filtrate buffer tank 3;

[0066] 2) The obtained filtrate is transported from the filtrate buffer tank 3 to the tubular heat exchanger 4 with a temperature of 55° C. through the delivery pump, and after the first cooling, it is transported to the continuous crystallizer 5 with a temperature of 35° C. for the second The temperature is lowered for the ...

Embodiment 3

[0071] The present embodiment adopts the system as described in embodiment 1 to carry out the preparation of ammonium metavanadate, and concrete steps are:

[0072] 1) Circulate the calcium vanadate transfer solution with a temperature of 90°C in the transfer reaction tank 1 in the first return line for 5 minutes, close the first return line, open the second return line, so that the slurry has a pore size of 5 μm The horizontal filter press 2 kept for 3min to form a filter cake layer, the second return line was closed, and the filtrate was collected in the filtrate buffer tank 3;

[0073] 2) The obtained filtrate is transported from the filtrate buffer tank 3 to the tubular heat exchanger 4 with a temperature of 50° C. through the delivery pump, and after the first cooling, it is transported to the continuous crystallizer 5 with a temperature of 40° C. for the second The temperature is lowered for the second time to obtain crystal slurry;

[0074] 3) The magma described in st...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a system and a method for preparing ammonium metavanadate crystals. The system is characterized by comprising the following sequentially connected units: a solubilization reaction tank (1), a horizontal filter press (2), a filtrate buffer tank (3), a heat exchanger (4), a crystallizer (5), a thickening device (6), a crystal slurry storage tank (7) and a horizontal filter press (8), wherein a mother liquor storage tank (9) is arranged between the thickening device (6) and the horizontal filter press (8) and is used for collecting supernatant. According to the system, theheat exchanger is arranged in front of the crystallizer, so that the filtering speed of sodium metavanadate extraction liquid is accelerated, the problem of failure in filtration of medium-particle impurities in a filtering process is avoided, the efficient crystallization of the ammonium metavanadate is realized under the weak alkaline condition, the particle size and water content of the ammonium metavanadate crystals are effectively controlled, the problem of blockage of the ammonium metavanadate crystals is solved, and the efficiency of a crystallization system is increased. The system andthe method have good application prospect.

Description

technical field [0001] The invention belongs to the technical field of vanadium chemical industry, and relates to a system and method for preparing ammonium metavanadate crystals. Background technique [0002] At present, in the field of vanadium chemical technology at home and abroad, the vanadium slag sodium roasting process is usually used to prepare vanadium oxides. The basic principle is that Na 2 CO 3 As an additive, the low-valence vanadium is converted into water-soluble pentavalent vanadium sodium salt through high-temperature sodium roasting process (750-850°C), and the leaching solution of sodium metavanadate is obtained after water immersion, and then ammonium salt is added Precipitation of ammonium metavanadate is obtained, and vanadium oxide is obtained after reduction roasting. [0003] In order to ensure that the leaching solution does not contain particulate impurities, the traditional calcium vanadate transsolution filtration system usually uses a small-p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01G31/00B01D9/02
CPCB01D9/0013C01G31/00B01D2009/0086
Inventor 李兰杰王海旭祁健杜浩辛玥
Owner HEBEI IRON AND STEEL
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com