PL78961B2 - - Google Patents
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- Publication number
- PL78961B2 PL78961B2 PL15937672A PL15937672A PL78961B2 PL 78961 B2 PL78961 B2 PL 78961B2 PL 15937672 A PL15937672 A PL 15937672A PL 15937672 A PL15937672 A PL 15937672A PL 78961 B2 PL78961 B2 PL 78961B2
- Authority
- PL
- Poland
- Prior art keywords
- zinc
- sulfur dioxide
- suspension
- concentration
- liter
- Prior art date
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 22
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 15
- 239000011787 zinc oxide Substances 0.000 claims description 11
- 239000011701 zinc Substances 0.000 claims description 9
- 229910052725 zinc Inorganic materials 0.000 claims description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 8
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 7
- 235000009529 zinc sulphate Nutrition 0.000 claims description 7
- 239000011686 zinc sulphate Substances 0.000 claims description 7
- 239000000725 suspension Substances 0.000 claims description 5
- 238000005245 sintering Methods 0.000 claims description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims 1
- 239000000243 solution Substances 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- 150000003751 zinc Chemical class 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical class OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- KSHPUQQHKKJVIO-UHFFFAOYSA-N [Na].[Zn] Chemical compound [Na].[Zn] KSHPUQQHKKJVIO-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000010310 metallurgical process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- HSYFJDYGOJKZCL-UHFFFAOYSA-L zinc;sulfite Chemical compound [Zn+2].[O-]S([O-])=O HSYFJDYGOJKZCL-UHFFFAOYSA-L 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Description
Pierwszenstwo: 16.10.1972 (P. 159376) Zgloszenie ogloszono: 30.09.1973 Opis patentowy opublikowano: 08.09.1975 78961 KJ. 12i# 17/60 MKP COlb 17/60 CZYTELNIA Urzedu Patentowego Twórcywynalazku: Józef Szarawara, Leon Forner, Józef Marszalek, Czeslaw Kozik Uprawniony z patentu tymczasowego: Politechnika Slaska im. W. Pstrowskiego, Gliwice (Polska) Sposób utylizacji dwutlenku siarki z rozcienczonych gazów emitowanych w hutach cynky Przedmiotem wynalazku jest sposób odzyskiwania dwutlenku siarki z rozcienczonych gazów emitowanych w hutach cynku przez absorbcje w zawiesinie tlenku cynku.W znanej metodzie sodowo-cynkowej absorbentem jest wodny roztwór siarczynu — sodowego, który rege neruje sie za pomoca tlenku cynku. Powstajacy nierozpuszczalny siarczyn cynku rozklada sie termicznie w piecu i czysty tlenek zawraca do procesu. W tej postaci metoda cynkowa nie znalazla zastosowania praktycznego.Winnej uproszczonej metodzie absorbentem jest wodna zawiesina czystego tlenku cynku/Stosowany w tym procesie obieg ZnO -? ZnS03 -? ZnO i zawracanie ZnO, jak tez koniecznosc stosowania czystego ZnO, na¬ lezy z praktycznego punktu widzenia uznac za wlasnosci niekorzystne tej metody cynkowej.Celem wynalazku jest polaczenie absorpcji dwutlenku siarki z procesem hutniczym w jedna calosc techno* logiczna. Cel ten osiagnieto w ten sposób, ze dwutlenek siarki absorbuje sie w zawiesinie technicznego tlenku cynku w roztworze siarczanu cynku o stezeniu 0,1-0,25 mola/litr, po czym wytracony produkt po oddzieleniu na filtrach wprowadza sie w stanie wilgotnym jako dodatek do wsadu siarczkowego w procesie spiekania rud a wydzielajacy sie w czasie rozkladu dwutlenek siarki odprowadza sie z gazami stezonymi do przerobu na kwas siarkowy, natomiast pozostajacy w obiegu roztwór siarczanu cynku po przekroczeniu stezenia 0,3 mola/litr wyprowadza sie z procesu i przerabia na cynk metaliczny.Wedlug wynalazku odlotowe gazy hutnicze zawierajace S02 plucze sie w temperaturze 20-80°C zawiesina technicznego tlenku cynku pochodzacego bezposrednio z pieców prazalniczych w roztworze siarczanu cynko¬ wego. Otrzymany w procesie osad zawierajacy wytracone sole cynku i nieprzereagowany tlenek, po oddzieleniu na filtrach, kieruje sie w postaci wilgotne} do spiekalni koncentratów cynkowych, gdzie wykorzystywany jest jako dodatek do wsadu siarczkowego na pierwszej tasmie Dwight-Lloyda. W procesie spiekania siarczyny a takze zawarte siarczany rozkladaja sie do tlenków, które wejda w sklad stalego spieczonego produktu i powstaja gazy stezone, które nadaja sie do bezposredniej przeróbki na kwas siarkowy.W roztworze obiegowym rosnie z czasem stezenie siarczanu cynku i gdy jego stezenie przekroczy wartosc c = 0,3 mola/litr, roztwór odprowadza sie i po uprzednim oczyszczeniu, odzyskuje sie cynk na drodze elektrolizy. W ten sposób przenosi sie S02 z gazów rozcienczonych do gazów stezonych, a uzyskane roztwory siarczanu cynkowego przerabia sposobem elektroche¬ micznym.2 78961 PL PLPriority: October 16, 1972 (P. 159376) Application announced: September 30, 1973 Patent description was published: September 8, 1975 78 961 KJ. 12i # 17/60 MKP COlb 17/60 READING ROOM of the Patent Office of Inventors: Józef Szarawara, Leon Forner, Józef Marszalek, Czeslaw Kozik Authorized by a temporary patent: Politechnika Slaska im. W. Pstrowskiego, Gliwice (Poland) Method of utilization of sulfur dioxide from diluted gases emitted in zinc smelters The subject of the invention is a method of recovering sulfur dioxide from diluted gases emitted in zinc smelters by absorption of zinc oxide in the suspension. In the known sodium-zinc method, the absorbent is an aqueous solution sodium sulphite, which is regenerated with zinc oxide. The resulting insoluble zinc sulfite is thermally decomposed in the furnace and the pure oxide is returned to the process. In this form, the zinc method has not found practical application. In another simplified method, the absorbent is an aqueous suspension of pure zinc oxide / ZnO cycle used in this process -? ZnS03 -? ZnO and the recycling of ZnO, as well as the necessity to use pure ZnO, must be considered from a practical point of view as disadvantageous properties of this zinc method. The aim of the invention is to combine the absorption of sulfur dioxide with the metallurgical process into a single technological whole. This goal was achieved by absorbing sulfur dioxide in a suspension of technical zinc oxide in a zinc sulphate solution at a concentration of 0.1-0.25 mol / liter, and then the precipitated product, after separation on filters, is added in a wet state as an additive to sulphide charge in the ore sintering process and the sulfur dioxide emitted during the decomposition is discharged with stagnant gases for processing into sulfuric acid, while the zinc sulphate solution remaining in circulation, after exceeding the concentration of 0.3 mol / liter, is withdrawn from the process and transformed into metallic zinc According to the invention, the SO2-containing metallurgical waste gas is washed at a temperature of 20-80 ° C with a suspension of technical zinc oxide coming directly from the roasting furnaces in a zinc sulphate solution. The sludge obtained in the process, containing the precipitated zinc salts and unreacted oxide, after being separated on the filters, is directed in the moist form to the zinc concentrate sintering plant, where it is used as an additive to the sulphide charge on the first Dwight-Lloyd belt. In the sintering process, the sulphites as well as the sulphates contained are decomposed into oxides, which will be included in the solid sintered product, and concentrated gases are formed, which are suitable for direct processing into sulfuric acid. In the circulating solution, the concentration of zinc sulphate increases over time and when its concentration exceeds the value c = 0.3 mol / liter, the solution is drained and, after purification, the zinc is recovered by electrolysis. In this way, SO2 is transferred from dilute gases to concentrated gases, and the resulting zinc sulphate solutions are processed by electrochemical method.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL15937672A PL78961B2 (en) | 1972-10-16 | 1972-10-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL15937672A PL78961B2 (en) | 1972-10-16 | 1972-10-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL78961B2 true PL78961B2 (en) | 1975-06-30 |
Family
ID=19960863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL15937672A PL78961B2 (en) | 1972-10-16 | 1972-10-16 |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL78961B2 (en) |
-
1972
- 1972-10-16 PL PL15937672A patent/PL78961B2/pl unknown
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