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A preparation method of precursor for magnetic flocculation and iron removal of hydrometallurgical acid leaching liquid

An acid leachate and hydrometallurgy technology, applied in the field of comprehensive utilization of resources, can solve the problems of unsatisfactory quality of precipitated slag, difficult filtration of fine particles, slow sedimentation and sedimentation speed, etc. Effect

Active Publication Date: 2015-10-21
CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the yellow potassium iron vanadium method has basically solved the solid-liquid separation problem in zinc hydrometallurgy, and the precipitation and crystallization of iron is good, the sedimentation rate of the precipitation produced by this method is slow, the aging time is long, the fine particles are difficult to filter, and the precipitated residue produced The taste is not ideal, and the comprehensive utilization is difficult

Method used

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  • A preparation method of precursor for magnetic flocculation and iron removal of hydrometallurgical acid leaching liquid
  • A preparation method of precursor for magnetic flocculation and iron removal of hydrometallurgical acid leaching liquid
  • A preparation method of precursor for magnetic flocculation and iron removal of hydrometallurgical acid leaching liquid

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Experimental program
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Effect test

Embodiment 1

[0031] Grind fayalite until the particle size is less than 74um, take 1 part and add 10 parts to phosphate starch solution with a mass concentration of 0.1%, soak for 1 hour, filter and separate; grind pyrolusite until the particle size is less than 74um, take 1 part and add 10 Soak in a CGM solution with a mass concentration of 0.1% for 0.5 hours, filter, separate and dry; mix pyrolusite and fayalite at a mass ratio of 1:2, and grind in a ceramic ball mill for 1 hour to obtain a precursor. It is used in the iron removal process of nickel sulfate in the high-pressure leaching solution of nickel smelting. Table 1 is the main component of the precipitated slag obtained in this embodiment and Fe 3+ concentration.

[0032] Table 1

[0033]

Embodiment 2

[0035] Grind the magnetite until the particle size is less than 74um, take 1 part and add 7 parts to the CMC solution with a mass concentration of 0.1%, soak for 1 hour, filter and separate; grind the ilmenite until the particle size is less than 74um, take 1 part and add 5 parts Soak in CGM solution with a mass concentration of 0.1% for 0.5 hours, filter, separate and dry; mix ilmenite and magnetite at a mass ratio of 1:3, grind in a ceramic stirring mill for 1 hour, and dry to obtain a precursor . It is used in the iron removal process of zinc sulfate in the high-pressure leaching solution of zinc smelting. Table 2 is the main component of the precipitated slag obtained in this embodiment and Fe 3+ concentration.

[0036] Table 2

[0037]

Embodiment 3

[0039] Grind titanomagnetite to a particle size of less than 74um, take 1 part and add 5 parts of xanthate starch solution with a mass concentration of 0.1%, soak for 1 hour, filter and separate; grind hematite to a particle size of less than 74um, take 1 Add 5 parts of CGM solution with a mass concentration of 0.1% and soak for 0.5 hours, filter, separate and dry; mix titanomagnetite and hematite at a mass ratio of 1:2, grind in a planetary mill for 0.5 hours, and dry , to obtain the precursor. It is used in the iron removal process of copper sulfate in the high-pressure leaching solution of copper smelting. Table 3 is the main component of the precipitated slag obtained in this embodiment and Fe 3+ concentration.

[0040] table 3

[0041]

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Abstract

The invention discloses a preparation method of a precursor for removing iron from hydrometallurgical acidic leaching solution by the magnetized flocculation method. The siderophile affinity minerals and magnetic materials are tightly combined under the actions of mechanic grinding to prepare a precursor for removing iron in the magnetized flocculation method, and the precursor is used in a magnetized flocculation technology for removing iron from hydrometallurgical acidic leaching solution. The precursor has the advantages of wide raw material resources, low price, strong magnetism, reinforcement on the crystallization of iron mineral, and difficulty in carrying valued metals.

Description

technical field [0001] The invention discloses a preparation method of a precursor used for iron removal by magnetic flocculation of hydrometallurgical acid leaching liquid, belonging to the field of comprehensive utilization of resources. Background technique [0002] In the process of hydrometallurgy, acidic solution is often used to leach ore, and iron in minerals often enters the solution in the form of trivalent or divalent ions. Iron removal is the most common and important process in hydrometallurgy due to the great hazards of iron in subsequent processes such as electrodeposition. Taking zinc hydrometallurgy as an example, zinc sulfide concentrate generally contains 5%-15% iron. When zinc and other non-ferrous metals enter the solution during the leaching process, iron also enters the solution to varying degrees. When the high temperature and high acid leaching process is used, the form of zinc ferrite (ZnFe 2 o 4 ) The leaching rate of zinc that exists reaches mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/22
Inventor 孙伟刘文莉唐鸿鹄韩海生
Owner CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECH DEV CO LTD
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