CN85107157A - Wet method is extracted white arsenic from arsenic-containing smoke dust - Google Patents
Wet method is extracted white arsenic from arsenic-containing smoke dust Download PDFInfo
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- CN85107157A CN85107157A CN 85107157 CN85107157A CN85107157A CN 85107157 A CN85107157 A CN 85107157A CN 85107157 CN85107157 CN 85107157 CN 85107157 A CN85107157 A CN 85107157A CN 85107157 A CN85107157 A CN 85107157A
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- exchange
- arsenic
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Abstract
The invention provides a kind of effective ways that extract high quality white arsenic from contain arsenic tin concentrate calcination fume and in other roasting process in the high-arsenic dust of output.Be characterized in the filtration after neutralizing of flue dust leachate, filtrate is carried out deep removal impurity with dynamic ion-exchange, and the feed liquor flow velocity is 2 to 12 centimetres of per minutes, and the discharge liquid acidity after the exchange is controlled at pH1.5 to 2, when pH=2, namely cut off feed liquor, the discharge liquid decolorization activated carbon powder after the exchange is discharged liquid by every liter of exchange and is added 0.5 to 2 gram active carbon, stirred 5 minutes, filter, the filtrate evaporation and concentration obtains all over products for containing As
2O
3〉=99% high quality white arsenic.
Description
The invention belongs to the improvement of wet method extracting white arsenic process, be specially adapted to from contain arsenic tin concentrate calcination fume to extract high quality white arsenic and from other roasting process, extract white arsenic in the high-arsenic dust of output.
At present, that uses in the production adds thermal distillation pyrogenic process extracting white arsenic process, and the white arsenic productive rate of high grade that exists the single flash output is very low, contains As
2O
3〉=99% product only accounts for the ten Percent of output below seven, and when flue dust contains antimony, and product quality is more difficult to reach requirement, on the other hand, because the pollution of arsenic steam causes the deterioration of working environment, inaccessible environmental protection standard.
China's " non-ferrous metal " 1984 the 6th phases were once announced a kind of wet method extracting white arsenic process.From tin concentrate calcination fume, adopt hot water leaching, in the soda and leachate to PH=6, remove most of beavy metal impurity, neutralization filtrate drops into H again
+Type ion exchange resin carries out static exchange, for the second time imurity-removal.Filtrate after every liter of neutralization need be with resin 30 grams, and 24 hours swap times, the pH value of filtrate changes to 2 by 6, with the clean liquid after the exchange through concentrate, crystallization obtains the white arsenic of product.Although white arsenic product quality increases than the way of distillation, contains As
2O
3〉=99% product can account for 25% of output, and improved environment, but, owing to be the Static Ion Exchange operation, thereby it is discontinuous to exist technical process, resin demand is big, imurity-removal is not thorough, and the washes of generation is more, and unstable product quality, product is often with some colors, and the whiteness of product does not reach the weak points such as requirement.
In order to overcome above-mentioned weak point, the present invention has adopted the dynamic ion-exchange operation, makes the filtrate after the neutralization pass through continuously exchange column, constantly obtain exchange and discharge liquid, reached deep removal impurity, and increased the activated carbon decolorizing operation, guaranteed that all over products reaches high-quality, all over products contains As
2O
3〉=99%.
Method of the present invention consists of: with H
+The type cationic ion-exchange resin is packed in the exchange column, and the internal diameter of post is 1: 25 with the ratio of height, and resin filling is crossed resin surface with the distillation water logging earlier to 4/5ths height of post.With arsenic leaching solution after neutralization, filter are clean, the continuous average rate of filtrate flows in the post, average rate is discharged the clean liquid after exchanging under the post, the feed liquor flow rate control is 2 to 12 centimetres of per minutes, the pH value of exchange liquid effluent generally is controlled at 1.5 to 2, when the liquid effluent pH value reaches 2, cut off feed liquor and liquid effluent, second step removed the impurity operation and promptly comes to an end.Resin acceptable salts acid regeneration recycles, and the clean liquid after the exchange adds 0.5 to 2 gram active carbon by every liter of solution, and stirring reaction is after 5 minutes, active carbon is leached, and filtrate is concentrated into 1/5th of original volume, crystallisation by cooling, crystal obtains all over products for containing As 80 ℃ of lower oven dry 1 hour
2O
3〉=99% high quality white arsenic, whiteness is greater than 80 degree, and wastewater flow rate reduces 2/3rds than static exchange operation, and every liter of solution only takies resin 10 grams.
Embodiment 1
A tin concentrate calcination fume, its major ingredient is (%) As25.8, Sn17.70, Sb2.01, Pb3.46, Zn 0.95, S0.96, get this dirt 800 grams, leach with hot water, 11.9 liters of leach liquors, the leaching yield of arsenic is 89.56%, leach liquor is with the soda PH=6 that neutralizes, neutralization filtrate is sent to ion-exchange and is taken off assorted,, high 50 centimetres in the exchange column through being 2 centimetres, fill 120 grams in the post and be converted into H
+The ion exchange resin of type for example, adopts domestic resin 732 type Zeo-karbs.Feed liquor evenly flows in the post with the speed of 8 centimetres of per minutes, discharge the rear liquid of exchange to be equal to speed under the post, control is discharged liquid PH 1.5 to 2, then join in the arsenic containing solution after the exchange by every liter of usefulness 2 gram amounts of activated carbon, stirred 5 minutes, filter only liquid be concentrated to 1/5th of original volume, crystallisation by cooling, crystal obtains white arsenic 181 grams of product 80 ℃ of lower oven dry one hour, contains As
2O
3Grade is 99.25%, and whiteness equals 87 degree.White arsenic productive rate is 67.83%, and as callable arsenic such as mother liquor are counted, white arsenic overall yield reaches 86.98%.
Embodiment 2
B tin concentrate calcination fume, its major ingredient is (%): As39.68, Sn12.98, Sb2.06, Pb4.49, Zn0.49, S1.02, gets this dirt 800 grams, through hot water leach 11.26 liters of leach liquors, the leaching yield of arsenic reaches 95.6%.With operation, dynamic ion-exchange operation and decolouring operation, obtain white arsenic 292 grams during leachate is undertaken by the method for embodiment 1, product contains As
2O
3Reach 99.88%, whiteness is 88 degree, and the direct yield of arsenic reaches 69.6%, and white arsenic overall recovery reaches 90.96%.
Embodiment 3
High mispickel calcination fume, its Main Ingredients and Appearance is (%): As44.05, Fe15.84, Sb1.89, Sn0.12, Pb0.35, Zn0.43, Cu0.04, S2.23, get this dirt 800 grams, get 16 liters of leachates through hot water leaching, the arsenic leaching rate is 90.1%, with leachate by the method for embodiment 1 neutralize, dynamic exchange and decolouring operation, obtain white arsenic 310.2 grams of product, product contains arsenic (As
2O
3) reaching 99.52%, whiteness is 85 degree, and white arsenic direct yield is 65.80%, and white arsenic overall recovery reaches 85.12%.
Claims (4)
1, a kind of method of from tin concentrate calcination fume, extracting white arsenic that is consisted of by hot water leaching, soda neutralization, ion-exchange step, it is characterized in that: among a. and after filtrate carry out deep removal impurity with dynamic ion-exchange, this filtrate is passed through exchange column continuously, constantly obtain exchange and discharge liquid, process is continuous, and the discharge liquid after the b. exchange decolours with active carbon.
2, method according to claim 1, the feed liquor flow velocity that it is characterized in that dynamic ion exchange are 2 to 12 centimetres of per minutes.
3, method according to claim 1, the liquid effluent acidity control after it is characterized in that exchanging when PH=2, are promptly cut off feed liquor at pH value 1.5 to 2.
4, the discharge liquid after the exchange according to claim 3 is characterized in that discharging liquid by every liter decolours to discharging liquid with 0.5 to 2 gram active carbon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85107157A CN85107157B (en) | 1985-09-18 | 1985-09-18 | Wet process for extracting white arsenic from arsenic-containing smoke dust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85107157A CN85107157B (en) | 1985-09-18 | 1985-09-18 | Wet process for extracting white arsenic from arsenic-containing smoke dust |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85107157A true CN85107157A (en) | 1987-04-01 |
| CN85107157B CN85107157B (en) | 1988-07-06 |
Family
ID=4795489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85107157A Expired CN85107157B (en) | 1985-09-18 | 1985-09-18 | Wet process for extracting white arsenic from arsenic-containing smoke dust |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85107157B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101928843A (en) * | 2010-09-01 | 2010-12-29 | 昆明圣奥科技发展有限公司 | Method for distilling and reclaiming arsenic in direct-current ore heating furnace |
| CN103449517A (en) * | 2013-08-27 | 2013-12-18 | 昆明理工大学 | Method for preparing white arsenic from arsenic-containing dust in evaporation-free manner |
-
1985
- 1985-09-18 CN CN85107157A patent/CN85107157B/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101928843A (en) * | 2010-09-01 | 2010-12-29 | 昆明圣奥科技发展有限公司 | Method for distilling and reclaiming arsenic in direct-current ore heating furnace |
| CN103449517A (en) * | 2013-08-27 | 2013-12-18 | 昆明理工大学 | Method for preparing white arsenic from arsenic-containing dust in evaporation-free manner |
| CN103449517B (en) * | 2013-08-27 | 2014-12-31 | 昆明理工大学 | Method for preparing white arsenic from arsenic-containing dust in evaporation-free manner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85107157B (en) | 1988-07-06 |
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