Method for preparing vanadium pentoxide from high-chrome vanadium slag

A vanadium pentoxide and high-chromium technology, applied in the field of vanadium chemical technology and resource recycling, can solve problems such as reducing production costs and pollution, and achieve the effects of avoiding water pollution, less ammonium salt consumption, and saving production costs.

Active Publication Date: 2019-01-08
NORTHEASTERN UNIV
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems in the prior art, the present invention provides a method for preparing vanadium pentoxide by using high-chromium vanadium slag, which can real

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
  • Method for preparing vanadium pentoxide from high-chrome vanadium slag

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1

[0034] A method for preparing vanadium pentoxide using high-chromium vanadium slag, the process flow is as follows figure 1 As shown, including the following steps:

[0035] (1) Roasting: the high-chromium vanadium slag is ground and then sieved, calcium oxide is added for mixing, and then calcified and roasted. The particle size of the high-chromium vanadium slag is 150-300 mesh to facilitate the oxidation of vanadium in the vanadium slag Calcification. Among them, the vanadium content of the high-chromium vanadium slag used (in V 2 O 5 Calculated) is 14.42%, chromium content (in Cr 2 O 3 Calcium) is 9.45%, mixed with calcium oxide evenly, and the ratio of calcium oxide: V in vanadium slag 2 O 5 =1; roasted at 900°C for 60 minutes to obtain roasted clinker; the roasted clinker has a particle size of 250-300 mesh after crushing.

[0036] (2) Leaching: Put the roasted clinker obtained in step (1) in (NH 4 ) 2 SO 4 -H 2 SO 4 Leaching in a collaborative leaching sys...

Example Embodiment

[0041] Example 2

[0042] A method for preparing vanadium pentoxide using high-chromium vanadium slag includes the following steps:

[0043] (1) Roasting: the high-chromium vanadium slag vanadium is ground, sieved, calcium carbonate is added for mixing, and then calcified and roasted. The particle size of the high-chromium vanadium slag is 150-300 mesh to facilitate the oxidation of vanadium in the vanadium slag Calcification. Among them, the vanadium content of the high-chromium vanadium slag used (in V 2 O 5 Calculated) is 10.38%, chromium content (in Cr 2 O 3 Calculated) is 13.27%, mixed with calcium carbonate evenly, and then the ratio of calcium carbonate: vanadium slag V 2 O 5 = 2. The roasted clinker is calcined at 850°C for 180 minutes; the calcined clinker is crushed to a particle size of 250-300 mesh.

[0044] (2) Leaching: (NH4) 2 SO 4 -H 2 SO 4 Synergistic leaching system consists of 50g / L (NH 4 ) 2 SO 4 Solution and volume fraction of 20% H 2 SO 4 Solution composition, ...

Example Embodiment

[0049] Example 3

[0050] A method for preparing vanadium pentoxide using high-chromium vanadium slag includes the following steps:

[0051] (1) Roasting: the high-chromium vanadium slag vanadium is ground and then sieved, calcium oxide is added for mixing, and then calcified and roasted. The particle size of the high-chromium vanadium slag is 150-300 meshes to facilitate the calcification of vanadium in the vanadium slag. Among them, the vanadium content of the high-chromium vanadium slag used (in V 2 O 5 Calculated) is 11.97%, chromium content (in Cr 2 O 3 Calcium) is 10.24%, mixed with calcium oxide evenly, and then the ratio is molar ratio, calcium oxide: V in vanadium slag 2 O 5 = 3.5. Roasted at 850°C for 120 minutes to obtain roasted clinker; the roasted clinker is crushed to a particle size of 250-300 mesh.

[0052] (2) Leaching: (NH 4 ) 2 SO 4 -H 2 SO 4 The collaborative leaching system is composed of 250g / L (NH 4 ) 2 SO 4 Solution and volume fraction of 20% H 2 SO 4 Solut...

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

No PUM Login to view more

Abstract

The invention relates to a method for preparing vanadium pentoxide from high-chrome vanadium slag. The method comprises the following steps: mixing the high-chrome vanadium slag with calcium salt to obtain a mixed material, roasting the mixed material at high temperature to obtain a roasted clinker; leaching the roasted clinker under a leaching medium, namely a (NH4)2SO4-H2SO4 collaborative system, filtering and separating a solid from liquid, and obtaining vanadium-containing leachate and chrome-containing leachate; adjusting the pH value and temperature of the vanadium-containing leachate toprecipitate vanadium, and filtering and separating a solid from liquid, and obtaining ammonium vanadate precipitates and vanadium precipitated supernate; roasting the ammonium vanadate precipitates to obtain ammonium vanadate precipitates, thus preparing a vanadium pentoxide product; and circulating the vanadium precipitated supernate back into a leaching system as a leaching medium. The method disclosed by the invention realizes efficient separation of chrome vanadium in the high-chrome vanadium slag; the purity of the prepared vanadium pentoxide is relatively high, and the obtained vanadiumprecipitated supernate can be circulated back into the leaching process for utilization; cyclic utilization of vanadium precipitated ammonia-nitrogen wastewater is realized; water pollution is avoided; and the production cost is effectively reduced.

Description

technical field [0001] The invention relates to a method for preparing vanadium pentoxide from high-chromium vanadium slag, and belongs to the technical field of vanadium chemical technology and resource recycling technology. Background technique [0002] Vanadium and chromium are important rare metals, and their compounds are widely used in metallurgy, chemical industry, building materials and many other fields. High-chromium vanadium slag is a by-product of the smelting process of high-chromium vanadium-titanium magnetite, in which both vanadium and chromium have relatively high grades, so it is a potential raw material for extracting vanadium and chromium. However, there are two limiting factors in the process of separating and extracting vanadium and chromium from high-chromium vanadium slag: one is that it is difficult to separate vanadium and chromium due to the similar properties of vanadium and chromium; Difficult to deal with waste water and waste residue. Therefo...

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): C22B1/02C22B7/04C22B34/32C01G31/02
CPCC01G31/02C01P2006/80C22B1/02C22B7/008C22B7/04C22B34/32Y02P10/20
Inventor 姜涛温婧高慧阳薛向欣
Owner NORTHEASTERN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap