Method for carrying out phosphorus removal on acidic vanadium-containing solution

Abstract

The invention relates to the field of phosphor removal of an acidic vanadium-containing solution, and discloses a method for carrying out phosphorus removal on the acidic vanadium-containing solution, wherein the method comprises the following step: under the condition with a pH value of 2.5-3.5, carrying out a contact process on the acidic vanadium-containing solution, hydrogen peroxide and zirconium sulfate. According to the method for carrying out phosphorus removal on the acidic vanadium-containing solution disclosed by the invention, the allowed concentration range of the acidic vanadium-containing solution is large, and the phosphor removal can be effectively carried out on the acidic vanadium-containing solution; moreover, the vanadium loss is relatively small when the phosphor removal is carried out.

Description

technical field [0001] The invention relates to a method for removing phosphorus from an acidic vanadium-containing solution. Background technique [0002] Vanadium slag is the main raw material for the preparation of vanadium oxide. At present, there are two main industrialized vanadium extraction processes, namely, sodium roasting and vanadium extraction process and calcification roasting vanadium extraction process. The vanadium slag used in industrial production is mainly ordinary vanadium slag, which is characterized by low CaO content, generally CaO / V 2 O 5 ≤0.15. However, for CaO / V 2 O 5 For high-calcium and high-phosphorus vanadium slag ≥0.16 and P≥0.06%, it is not suitable to use sodium roasting-water leaching vanadium slag due to the high CaO content leading to a significant reduction in roasting conversion rate; The vanadium process treatment of high calcium and high phosphorus vanadium slag, first of all, it is necessary to solve the technical problem of dee...

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Problems solved by technology

[0004] However, when the above two methods of phosphorus removal are applied to acidic vanadium-containing solutions, there are certain problems: the pH of the acidic vanadium-containing solution obtained by acid leaching of vanadium slag calcification and roasting clinker is generally in the range of 2.8-3.5, and when adjusted to 4.0-4.5 A large amount of precipitation will lead to loss of vanadium; if iron salt is used to remove phosphorus, the added ferric ions will form iron vanadate precipitation with vanadium, resulting in a large loss of vanadium; if zirconium salt is used to remove phosphorus, it needs to be carried out once during acid leaching Phosphorus removal leads to high phosphorus content in the vanadium extraction residue, which is not conducive to the internal recycling of the vanadium extraction residue in iron and steel enterprises, or the phosphorus concentration in the acidic vanadium-containing solution is high, and the solution cannot achieve the effect of deep phosphorus removal at one time.