Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method for purifying stone coal acid leaching solution and recovering aluminum, potassium and iron

A technology of stone coal acid and aluminum recovery, which is applied in the field of purification of stone coal acid leaching solution and recovery of aluminum, potassium and iron, which can solve the problems of cumbersome separation process and achieve the effect of simple operation and low cost

Active Publication Date: 2020-11-17
INST OF PROCESS ENG CHINESE ACAD OF SCI
View PDF19 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that in an acidic solution with high temperature, pH=1-3.5, and high iron content, vanadic acid and iron vanadate precipitation of pentavalent vanadium will inevitably be produced, and the subsequent separation process of jarosite and pentavalent vanadium precipitation is cumbersome. Dissolve with strong alkali first, then adjust the pH with acid to precipitate vanadium, resulting in a large amount of process wastewater in the process. It can be seen that there are many problems in the co-extraction of vanadium and iron

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
  • A method for purifying stone coal acid leaching solution and recovering aluminum, potassium and iron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] The composition of stone coal acid leaching liquid used in this example is V 1.72g / L, Al 9.32g / L, K 1.73g / L, Fe0.59g / L.

[0077] Follow the steps below to purify stone coal acid leaching solution and recover aluminum, potassium and iron:

[0078] (1) 2L stone coal pickling solution was cooled from 50°C to 40°C for cooling and crystallization, and solid-liquid separation was carried out to obtain 45.7g of alum and 1.96L of filtrate;

[0079] (2) Adjust the pH of the filtrate obtained in step (1) from -1.2 to -1 with sodium carbonate and potassium hydroxide, and then add peroxide, persulfate, sulfite and pyrosulfite to adjust the redox potential Be 850mV, obtain the solution after treatment;

[0080] (3) Heat the solution obtained in step (2) to 200°C, add sodium hydroxide, ammonia water and sodium bicarbonate to control and keep the pH of the solution at -1, add ferric compounds, nitrite, chlorate, and thiosulfate Control and maintain the redox potential of the solutio...

Embodiment 2

[0084] The composition of stone coal acid leaching liquid used in this example is V 1.72g / L, Al 9.32g / L, K 1.73g / L, Fe0.59g / L.

[0085] Follow the steps below to purify stone coal acid leaching solution and recover aluminum, potassium and iron:

[0086] (1) Primary crystallization: add 2.9g sodium sulfate, 16.8g ammonium bisulfate, 3.6g ammonium bicarbonate and 16g potassium bicarbonate in 3L stone coal pickling solution (the addition of additive is to make the aluminum in the stone coal pickling solution Form alum and iron to form 0.5 times of the theoretical amount of jarosite), drop from 70 ℃ to room temperature (20 ℃) ​​cooling crystallization, solid-liquid separation, obtain 264.1g alum and 2.85L filtrate;

[0087] (2) Solution treatment: the filtrate obtained in step (1) is at first adjusted to pH from -0.5 to 0 with ammoniacal liquor, ammonium carbonate, ammonium bicarbonate, sodium bicarbonate, potassium carbonate and calcium hydroxide, then passes into air, sulfur dio...

Embodiment 3

[0092] The composition of stone coal acid leaching liquid used in this example is V 1.72g / L, Al 9.32g / L, K 1.73g / L, Fe0.59g / L.

[0093] Such as figure 1 As shown, the following steps are followed to purify the stone coal acid leaching solution and recover aluminum, potassium and iron:

[0094] (1) Primary crystallization: add 8.7kg ammonium sulfate, 0.5kg ammonium carbonate and 0.69kg ammonium bicarbonate in 50L stone coal pickling solution (the addition of additive is to make the aluminum in stone coal pickling solution form alum and iron form yellow 5 times the theoretical amount of alum), dropped from 90°C to 0°C for cooling crystallization, solid-liquid separation, obtained 7.5kg alum and 46L filtrate;

[0095] (2) Solution treatment: the filtrate obtained in step (1) is first adjusted to pH from 1 to 2 with sodium hydroxide, potassium bicarbonate, calcium oxide and calcium carbonate, then feeds oxygen, ozone, adds perchlorate, nitrite Nitrate, nitrate, manganese-contain...

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 provides a method for purifying stone coal pickle liquor and recovering aluminum, potassium and iron. The method comprises the steps that the stone coal pickle liquor is subjected to cooling crystallization and solid-liquid separation to obtain alums and separating liquid; (2) the pH of the separating liquid in the step (1) is adjusted, the redox potential is adjusted, and an aftertretament solution is obtained after a reaction; (3) the aftertretament solution in the step (2) is heated, the pH value of the solution and the redox potential are controlled, solid-liquid separation is carried out, and an iron precipitate and separating liquid are obtained; and (4) the iron precipitate obtained in the step (3) is subjected to product separation, and an iron product and sulfate liquor are obtained, and the iron product is ferric oxide or ferric hydroxide. By means of the method, a vanadium containing solution can be purified, the follow-up high-purity vanadium product is betterachieved, multiple high value-added products are obtained, and the method has the beneficial effects of being low in cost, easy to operate, clean, environment-friendly and the like.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy and vanadium chemical industry, and in particular relates to a method for purifying stone coal acid leaching solution and recovering aluminum, potassium and iron. Background technique [0002] Stone coal is a vanadium-containing polymetallic mineral resource and one of the main raw materials for extracting vanadium. In addition to vanadium, stone coal often contains aluminum, potassium, iron, calcium, magnesium, molybdenum, nickel, cobalt, copper, and titanium. , chromium, uranium, selenium and other associated elements. At present, the methods for extracting vanadium from stone coal mainly include two categories: roasting method and acid leaching method. Due to the serious pollution of vanadium extraction process by roasting method and the low recovery rate of vanadium, it has gradually been eliminated, and now the acid leaching process is mostly used in production. Various metal impurit...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/22C22B3/44C22B21/00C22B26/10C22B34/22
CPCC22B3/22C22B3/44C22B21/0015C22B26/10C22B34/22
Inventor 董玉明李会强张笛裴丽丽张红玲徐红彬张懿
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com