Method for comprehensively recovering aluminum and potassium from vanadium extraction from stone coal

A recovery method and stone coal technology, applied in the direction of improving process efficiency, can solve the problem of potassium not being effectively recovered and utilized, and achieve the effects of high recovery rate, avoiding ammonia nitrogen wastewater and reducing environmental pollution.
CN102424914AInactive Publication Date: 2012-04-25CENT SOUTH UNIV
1 Cites 29 Cited by

Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2012-04-25
Estimated Expiration
Not applicable ยท inactive patent
Patent Text Reader

Abstract

The invention discloses a method for comprehensively recovering aluminum and potassium from vanadium extraction from stone coal. The technical process of the method mainly comprises: crystallizing pentaphyllum potassium aluminum sulfate in sulfuric acid leachate of stone coal; purifying pentaphyllum potassium aluminum sulfate recrystals, or adding water to dissolve the pentaphyllum potassium aluminum sulfate recrystals and adding a potassium-containing pH regulator to precipitate aluminum; filtering to obtain aluminum hydroxide and a potassium sulfate or potassium hydrogen sulfate solution; transforming the potassium sulfate or potassium hydrogen sulfate solution by lime to obtain potassium carbonate or potassium hydroxide; and thus, effectively separating and recovering aluminum and potassium. The method has the advantages that: the aluminum and potassium recovery rates are high; the products are diversified; impurities harmful to the recycling of water from vanadium extraction from stone coal are not introduced in the aluminum and potassium recovery technical process; the reagent consumption is small; the production cost is low; environment pollution is avoided; and the like.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a comprehensive recovery method for extracting vanadium, aluminum and potassium from stone coal. Background technique

[0002] Stone coal is a vanadium-containing polymetallic mineral resource, and stone coal usually contains SiO 2 50%-75%, Al 2 o 3 7%-17%, K 2 O2%-5%, V 2 o 5 0.15%-3.5%, including V 2 o 5 More than 0.8% stone coal can be mined as vanadium ore. Aluminum and potassium in stone coal are mainly composed of potassium mica (KAl 2 (Si 3 Al)O10(OH) 2 ) and illite (K(Al, V) 2 (Si,Al) 4 O10(OH) 2 ) form exists. The common process for extracting vanadium from stone coal is sulfuric acid leaching. At present, the processes for extracting vanadium from stone coal acid leaching solution include:

[0003] 1) Stone coal sulfuric acid leaching solution โ†’ ammonium salt removal of aluminum โ†’ reduction โ†’ extraction โ†’ stripping โ†’ oxidation โ†’ ammonium salt precipitation of vanadium โ†’ calcination to obtain refined ...

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