RO114982B1 - Process for recovering nickel from waste water and nickel-bearing sludges - Google Patents
Process for recovering nickel from waste water and nickel-bearing sludgesInfo
- Publication number
- RO114982B1 RO114982B1 RO92-200139A RO92200139A RO114982B1 RO 114982 B1 RO114982 B1 RO 114982B1 RO 92200139 A RO92200139 A RO 92200139A RO 114982 B1 RO114982 B1 RO 114982B1
- Authority
- RO
- Romania
- Prior art keywords
- nickel
- waste water
- sludges
- solution
- recovering
- Prior art date
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Invenţia se referă la un procedeu de recuperare a nichelului din ape reziduale şi nămoluri nichelifere, constând, într-o primă fază, în spălarea nămolului nichelifer cu apă conţinând un adaos de 0,05...0,3% soluţie medasol, reprezentând o poliacril - amidă hidrolizată, drept floculant, după care, într-o fază următoare, suspensia separată prin filtrare este tratată cu acid azotic, sulfuric sau clorhidric, pentru solubilizarea nichelului, la pH=2,5...5,5 şi 70...85°C, după filtrarea impurităţilor şi concentrarea prin evaporare a soluţiei nichelifere reziduale, sarea de nichel obţinută fiind cristalizată prin răcire şi uscată, putând fi utilizată în circuitul industrial.The invention relates to a process for the recovery of nickel in wastewater and nicheliferous sludges, consisting in a first stage in the washing of the nickelliferous sludge with water containing an addition of 0.05 ... 0.3% medal solution, representing a hydrolyzed polyacrylamide as a flocculant, after which, in a subsequent step, the separated filtrate suspension is treated with nitric, sulfuric or hydrochloric acid to solubilize the nickel to pH = 2.5-5.5 and 70. .85 ° C, after filtration of the impurities and evaporation concentration of the residual nichelifer solution, the obtained nickel salt being crystallized by cooling and drying and can be used in the industrial circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RO92-200139A RO114982B1 (en) | 1992-02-13 | 1992-02-13 | Process for recovering nickel from waste water and nickel-bearing sludges |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RO92-200139A RO114982B1 (en) | 1992-02-13 | 1992-02-13 | Process for recovering nickel from waste water and nickel-bearing sludges |
Publications (1)
Publication Number | Publication Date |
---|---|
RO114982B1 true RO114982B1 (en) | 1999-09-30 |
Family
ID=64357669
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
RO92-200139A RO114982B1 (en) | 1992-02-13 | 1992-02-13 | Process for recovering nickel from waste water and nickel-bearing sludges |
Country Status (1)
Country | Link |
---|---|
RO (1) | RO114982B1 (en) |
-
1992
- 1992-02-13 RO RO92-200139A patent/RO114982B1/en unknown
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