CS211869B1 - Method of gaining the ortute from the refuse waters - Google Patents
Method of gaining the ortute from the refuse waters Download PDFInfo
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- CS211869B1 CS211869B1 CS153680A CS153680A CS211869B1 CS 211869 B1 CS211869 B1 CS 211869B1 CS 153680 A CS153680 A CS 153680A CS 153680 A CS153680 A CS 153680A CS 211869 B1 CS211869 B1 CS 211869B1
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- Czechoslovakia
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- mercury
- waste water
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- waste
- flotation
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- Treating Waste Gases (AREA)
- Removal Of Specific Substances (AREA)
Description
Vynález rieši isposob izískavania ortute z odpadných vod z kondenzácie ako aj z čistenia odplynov po odpražovani ortute zo sirníkových flotačných koncentrátov a z odpadných priemyselných produktov obsahujúcich ortuť.The present invention provides a method for the recovery of mercury from waste water from condensation as well as from the purification of off-gas after mercury evaporation from sulfide flotation concentrates and from industrial waste products containing mercury.
Pri kondenzácii ortuťových pár po odpražení ortute ako aj při čistění odplynov za mokra sa dostává do odpadných vod ortuť, hlavně vo formě drobných kvapóčok ale a) vo formě jemných minerálnych zrn. Koncentrácia ortute v odpad ných vodách -može dosahovat až niekolko desiato;k miligramu na liter vody. Taktiež pH odpadných vód sa merií v širakom rozmedzí podlá spracovávanej suroviny. Při olejovom vykuřovaní odpražovacej pece č-ast oleja v dósled-ku nedoko nalého horenia sa dostává do odplynov, spolu s ortuťou kondenzuje, pričom za zadrží na jej povrchu, čím sa stavajú ikvapóňky ortute hydrofotonými, nezlievajú sa vo vačši-e kvapky a ť-ažko sedimentuijú.During mercury vapor condensation after mercury evaporation as well as wet scrubbing, mercury enters the wastewater, mainly in the form of small droplets but a) in the form of fine mineral grains. The concentration of mercury in the waste water can reach up to several tens, per milligram per liter of water. Also, the pH of the waste water is measured over a wide range according to the feedstock being processed. In the oil-fired evaporation furnace, part of the oil, due to poor combustion, enters the flue gas, condenses with mercury and retains on its surface, thereby forming mercury droplets with hydrophotons, rather than pouring droplets and drops into it. to sedimentuijú.
Známým spósobom získavania ortute z odpadných vód je vyzrážanie vo vodě rozpuštěných kovov vápníkom za vzniku vločkovitej zrazeniny, ktorá při sedimentární strhává i rozptýlené kvapočky ortute do sedimentu. Úspěch tejto metody závisí od obsahu rozpuštěných kovov hlavně železa v odpadných vodách, ktoré potřebná vločkovitá zrazeninu vytvárajú. Nedostatkom tejto metody je, že produkuje velké množstvo objemnej zrazeniny s nízkou koncentráciou ortute.A known method of recovering mercury from waste water is by precipitating the water-dissolved metals with calcium to form a flocculent precipitate which, in the sedimentary phase, entrains the dispersed mercury droplets into the sediment. The success of this method depends on the content of dissolved metals, mainly iron, in the waste water which forms the necessary flocculent precipitate. The disadvantage of this method is that it produces a large amount of a bulky precipitate with a low mercury concentration.
Dalším známým sposobom získavania ortute z odpadných vód je filtrácla cez filtračnú tkaninu alebo cez jemnozrnnú filtračnú vrstvu tvořená aktívnym uhlím alebo sírou alebo kovom, s ktorým ortuť vytvára amalgám. Filtračná tkanina zadrží pevné častíce odpadných vód včetne ortute vo formě filtračného koláča. Filtračná vrstva zadrží ortuť bud vo formě kovověj zlučeniny .alebo amalgénu a získává sa z nej odpražením. Nedostatkom filtračnej metódy je malý specifický výkon, obtiažná manipulácia s výměnou filtračnej vrstvy a dává koncentrát s nízkým obsahom ortute.Another known method of recovering mercury from waste water is by filtration through a filter cloth or through a fine-grained filter layer consisting of activated carbon or sulfur or metal with which mercury forms amalgam. The filter fabric retains solid waste water particles including mercury in the form of a filter cake. The filter layer retains the mercury either in the form of a metallic compound or amalgene and is obtained by deprotection. The drawback of the filtering method is its low specific performance, the difficulty of handling the filter layer change and gives a concentrate with a low mercury content.
Nedostatky uvedených spósobov odstraňuje spósob podlá tohoto vynálezu, podstata ktorého spočívá v tom, že sa upraví pH odpadných vód prídavkom kyseliny sírovej v množstve 25 až 250 g na 1 m3 odpadnej vody na hodnotu 3 až 5, Po úpravě pH odpadně vody sa podrobia flotácli za přídavku xantogenanov, výhodné butylxantogenamu draselného v množstve 5—90 g/m3 odpadnej vody a peniča, výhodné peniča na báze terpénov v množstve 3 až 35 g/m3 odpadnej vody. Pěnový produkt flotácie obsahujúci ortuť sa vysuší prídavkom práškového vápna v pomere k pěnovému produktu 0,05 ku 1 až 0,3 ku 1, alebo sa vysuší prirodzeným odparom na volnom priestranstve.The drawbacks of the above methods are overcome by the method according to the invention, which consists in adjusting the pH of the waste water by adding sulfuric acid in an amount of 25 to 250 g per 1 m 3 of waste water to a value of 3-5. with the addition of xanthate, preferably potassium butylxanthogenam in an amount of 5-90 g / m 3 of waste water and foamer, preferably terpene-based foamer in an amount of 3 to 35 g / m 3 of waste water. The mercury-containing flotation foam product is dried by the addition of lime powder relative to the foam product 0.05 to 1 to 0.3 to 1, or dried by natural evaporation in the open air.
Vyšší účinok sa prejaví v tom, že na relativné malom technologickom /zariadení je možné spra· covať veilké množstvo odpadných vod, získat koncentrát s vyšším obsahom ortute při vysokej výťažnostl a zároveň v podstatnej mlere znížiť toxicitu odpadných vód. Mikrokvapóčky ortute s olejovým povlakom sa skoncentrujú v penovom produkte aj bez prídavkp zberača. Spósob vynálezu je účinný aj ná najjemnejšie kvapóčky ortute.A greater effect is shown in the fact that relatively small process / plant can treat a large amount of wastewater, obtain a concentrate with a higher mercury content at high yields, and at the same time reduce the wastewater toxicity in a substantial degree. The mercury microdroplets with oil coating are concentrated in the foam product even without the addition of a collector. The finest mercury droplets are also effective in the method of the invention.
PříkladExample
Odpadně vody z kondenzácie ortute a z prepierania odplynov bolí v laboratórnych podmienkach upravené prídavkom kyseliny sírovej v množstve 65 g na 1 m3 odpadnej vody, čím bolo pH odpadnej vody znížené z povodně] hodnotyWaste water from mercury condensation and off-gas scrubbing is treated under laboratory conditions by the addition of 65 g sulfuric acid per 1 m 3 of waste water, thereby reducing the pH of the waste water from the flood.
5,5 na hodnotu 3,5. Prídavkom butylxantogenanu draselného v množstve 40 g/m3 odpadnej vody a borovicového oleja v množstve 15 g/m3 odpadnej vody bola flotovaná ortuť po dobu 5 minút. Ortuť v podaní a v odpade bola stanovená tak, že odpadná voda bola přefiltrovaná cez filtračný papier. Zo zachyteného kalu sa stanovila ortuť, ktorá potom bola přepočítaná na póvodné množstvo odpadnej vody.5.5 to 3.5. Addition of 40 g / m 3 of wastewater potassium potassium xanthate and 15 g / m 3 of pine oil wastewater mercury was floated for 5 minutes. The mercury in the feed and waste was determined by filtering the waste water through filter paper. Mercury was determined from the collected sludge and then converted to the original amount of waste water.
Obsah ortute v podaní (v odpadných vodách) 31 mg/1, obsah ortute v sušině koncentrátu (pěnového produktu) 11,3 °/o, obsah ortute v odpade 1,43 mg/1.The mercury content in the administration (in waste water) 31 mg / l, the mercury content in the dry matter of the concentrate (foam product) 11.3% / m, the mercury content in the waste 1.43 mg / l.
Výťažnosť ortute do koncentrátu 95;4 %.Mercury yield to concentrate 95.4%.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS153680A CS211869B1 (en) | 1980-03-06 | 1980-03-06 | Method of gaining the ortute from the refuse waters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS153680A CS211869B1 (en) | 1980-03-06 | 1980-03-06 | Method of gaining the ortute from the refuse waters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CS211869B1 true CS211869B1 (en) | 1982-02-26 |
Family
ID=5349965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS153680A CS211869B1 (en) | 1980-03-06 | 1980-03-06 | Method of gaining the ortute from the refuse waters |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS211869B1 (en) |
-
1980
- 1980-03-06 CS CS153680A patent/CS211869B1/en unknown
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