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PL420883A1 - Method for recovery of zinc in the form of an oxide from waste zinc electrolytes that contains ions of zinc, magnesium and manganese and free from ions of iron - Google Patents

Method for recovery of zinc in the form of an oxide from waste zinc electrolytes that contains ions of zinc, magnesium and manganese and free from ions of iron

Info

Publication number
PL420883A1
PL420883A1 PL420883A PL42088317A PL420883A1 PL 420883 A1 PL420883 A1 PL 420883A1 PL 420883 A PL420883 A PL 420883A PL 42088317 A PL42088317 A PL 42088317A PL 420883 A1 PL420883 A1 PL 420883A1
Authority
PL
Poland
Prior art keywords
zinc
ions
waste
sludge
magnesium
Prior art date
Application number
PL420883A
Other languages
Polish (pl)
Other versions
PL238930B1 (en
Inventor
Wojciech Hyk
Konrad Kitka
Original Assignee
Uniwersytet Warszawski
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Uniwersytet Warszawski filed Critical Uniwersytet Warszawski
Priority to PL420883A priority Critical patent/PL238930B1/en
Publication of PL420883A1 publication Critical patent/PL420883A1/en
Publication of PL238930B1 publication Critical patent/PL238930B1/en

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/20—Waste processing or separation

Landscapes

  • Removal Of Specific Substances (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

Niniejsze zgłoszenie dotyczy sposobu odzysku cynku w postaci tlenku z cynkowych elektrolitów odpadowych zawierających jony cynku, magnezu i manganu oraz wolnych od jonów żelaza obejmujący neutralizacje obecnego w elektrolicie kwasu. Sposób dzieli się na kilka następujących etapów: B) neutralizacje kwasu przez dodawanie do cynkowego elektrolitu odpadowego czynnika neutralizującego z wydzieleniem gazowego CO2 i osadu CaSO4 oraz oddzielenie osadu CaSO4 od roztworu. Następnie C) nasycanie wodnego roztworu NH3 gazowym CO2 oraz D) wydzielanie cynku w postaci osadu Zn(HCO3)2 przez połączenie porcjami roztworów z etapu (B) i (C), a następnie oddzielanie osadu od roztworu; po czym E) rozkład osadu Zn(HCO3)2 do ZnCO3; oraz F) poddawanie obróbce termicznej osadu ZnCO3 z wytworzeniem ZnO. Korzystnie, sposób obejmuje etap (A) wstępnej obróbki czynnika neutralizującego z wytworzeniem ziaren o średnicy nie większej niż 1 mm, przy czym czynnikiem neutralizującym w etapie (A) jest wapień.This application relates to a method for the recovery of zinc oxide in the form of zinc waste electrolytes containing zinc, magnesium and manganese ions and iron-free ions involving the neutralization of acid present in the electrolyte. The process is divided into several of the following stages: B) acid neutralization by adding a waste neutralizing agent to the zinc electrolyte with the evolution of CO2 gas and CaSO4 sludge and separating the CaSO4 sludge from the solution. Then C) saturation of the NH3 aqueous solution with CO2 gas and D) isolation of zinc in the form of a Zn (HCO3) 2 precipitate by combining in portions of the solutions from Steps (B) and (C), followed by separation of the precipitate from the solution; then E) decomposing the Zn (HCO3) 2 residue into ZnCO3; and F) heat treating the ZnCO3 sludge to form ZnO. Preferably, the method comprises the step (A) of pre-treating the neutralizing agent to obtain grains no greater than 1 mm in diameter, the limiting agent in step (A) being limestone.

PL420883A 2017-03-17 2017-03-17 Method for recovery of zinc in the form of an oxide from waste zinc electrolytes that contains ions of zinc, magnesium and manganese and free from ions of iron PL238930B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL420883A PL238930B1 (en) 2017-03-17 2017-03-17 Method for recovery of zinc in the form of an oxide from waste zinc electrolytes that contains ions of zinc, magnesium and manganese and free from ions of iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL420883A PL238930B1 (en) 2017-03-17 2017-03-17 Method for recovery of zinc in the form of an oxide from waste zinc electrolytes that contains ions of zinc, magnesium and manganese and free from ions of iron

Publications (2)

Publication Number Publication Date
PL420883A1 true PL420883A1 (en) 2018-09-24
PL238930B1 PL238930B1 (en) 2021-10-18

Family

ID=63578811

Family Applications (1)

Application Number Title Priority Date Filing Date
PL420883A PL238930B1 (en) 2017-03-17 2017-03-17 Method for recovery of zinc in the form of an oxide from waste zinc electrolytes that contains ions of zinc, magnesium and manganese and free from ions of iron

Country Status (1)

Country Link
PL (1) PL238930B1 (en)

Also Published As

Publication number Publication date
PL238930B1 (en) 2021-10-18

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