CN103449517B - Method for preparing white arsenic from arsenic-containing dust in evaporation-free manner - Google Patents
Method for preparing white arsenic from arsenic-containing dust in evaporation-free manner Download PDFInfo
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- CN103449517B CN103449517B CN201310377631.0A CN201310377631A CN103449517B CN 103449517 B CN103449517 B CN 103449517B CN 201310377631 A CN201310377631 A CN 201310377631A CN 103449517 B CN103449517 B CN 103449517B
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- arsenic
- acid
- smoke dust
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- containing smoke
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- 229910052785 arsenic Inorganic materials 0.000 title claims abstract description 60
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 title claims abstract description 59
- GOLCXWYRSKYTSP-UHFFFAOYSA-N arsenic trioxide Inorganic materials O1[As]2O[As]1O2 GOLCXWYRSKYTSP-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 239000000428 dust Substances 0.000 title claims abstract description 30
- 229960002594 arsenic trioxide Drugs 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 26
- KTTMEOWBIWLMSE-UHFFFAOYSA-N diarsenic trioxide Chemical compound O1[As](O2)O[As]3O[As]1O[As]2O3 KTTMEOWBIWLMSE-UHFFFAOYSA-N 0.000 title claims 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- DJHGAFSJWGLOIV-UHFFFAOYSA-N Arsenic acid Chemical compound O[As](O)(O)=O DJHGAFSJWGLOIV-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229940000488 arsenic acid Drugs 0.000 claims abstract description 21
- 239000012065 filter cake Substances 0.000 claims abstract description 20
- 239000000706 filtrate Substances 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 3
- 239000000779 smoke Substances 0.000 claims description 28
- 239000007789 gas Substances 0.000 claims description 20
- 239000002253 acid Substances 0.000 claims description 18
- 238000001704 evaporation Methods 0.000 claims description 16
- 230000008020 evaporation Effects 0.000 claims description 16
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- 238000002360 preparation method Methods 0.000 claims description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 239000003500 flue dust Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 238000006722 reduction reaction Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 3
- 229910017604 nitric acid Inorganic materials 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- IKWTVSLWAPBBKU-UHFFFAOYSA-N a1010_sial Chemical compound O=[As]O[As]=O IKWTVSLWAPBBKU-UHFFFAOYSA-N 0.000 abstract description 20
- 239000000047 product Substances 0.000 abstract description 11
- 238000002386 leaching Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000012535 impurity Substances 0.000 abstract description 4
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 239000007800 oxidant agent Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 24
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 150000002739 metals Chemical class 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000010310 metallurgical process Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910000673 Indium arsenide Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- RPQDHPTXJYYUPQ-UHFFFAOYSA-N indium arsenide Chemical compound [In]#[As] RPQDHPTXJYYUPQ-UHFFFAOYSA-N 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000009856 non-ferrous metallurgy Methods 0.000 description 1
- 239000000825 pharmaceutical preparation Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- -1 sanitas Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052569 sulfide mineral Inorganic materials 0.000 description 1
- 230000031068 symbiosis, encompassing mutualism through parasitism Effects 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Abstract
The invention relates to a method for preparing white arsenic from arsenic-containing dust in an evaporation-free manner, which belongs to the field of metallurgical engineering. The method comprises the following steps of: adding an oxidizing agent to oxidize trivalent arsenious acid into pentavalent arsenic acid during a process of leaching by water by virtue of the characteristics that arsenic acid is high in solubility in water and is low in solubility in water; purifying and removing impurities, then charging a reducing agent to reduce the pentavalent arsenic acid into the trivalent arsenious acid, cooling, and then crystallizing the arsenious acid into arsenic trioxide; and returning the filtrate obtained by filtering the cooled and crystallized product, leaching, drying the filter cake, thus obtaining the white arsenic product. According to the method, the characteristic of high solubility of pentavalent arsenic can be adequately utilized, and the high leaching rate of arsenic is realized with low water consumption and at a low reaction temperature, thus reducing water consumption and energy consumption.
Description
Technical field
The present invention relates to a kind of method exempting from the white arsenic of Evaporation preparation of arsenic-containing smoke dust, belong to metallurgical engineering field.
Background technology
Arsenic and compound thereof are general all toxic, and its toxicity is notorious, almost widely known.But arsenic and compound thereof industrially but have a wide range of applications field and superior using function.Be used as alloy addition and produce plumbous bullet processed, type metal, brass (condenser), accumulator grid, wear resistant alloy, High Strength Construction Steel and corrosion-resisting steel etc.Dezincify can be prevented containing a certain amount of arsenic in brass.High purity arsenic is the raw material producing gaas compound semiconductor, indium arsenide etc., is also the doped element of semiconductor material germanium and silicon.The compound of arsenic is also for the manufacture of agricultural chemicals, sanitas, dyestuff and pharmaceutical preparation etc.
Arsenic content in the earth's crust is also little, but it grows on trees at occurring in nature, mainly exists with the form of sulfide mineral.All containing the sulfide of a certain amount of arsenic in which kind of metallic sulfide ores, the heavy metals such as general and copper, lead, zinc, tin, tungsten, molybdenum, mercury and the association of gold and silver precious metal ore or symbiosis, the concentrate with metal enters smeltery and chemical plant.Arsenic pollute be present in nonferrous metallurgy and chemical industry mining, mineral ore dressing processing be separated, smelt and to purify and in the process such as chemical industry deep processing, in recent years, environmental pollution becomes the focus of social concerns, particularly heavy metal and arsenic pollution.The improvement of arsenic has become the bottleneck of restriction metallurgical industry development.
Arsenic-containing smoke dust in metallurgical or chemical industry contains other valuable metals toward contact, after generally taking to extract arsenic wherein, valuable constituent is returned technical process.The extraction process of arsenic in flue dust, generally has following several method.With acid or water close to boiling temperature under leach, purification after evaporation concentration prepare white arsenic product (Huang Gansheng, Quan Changrong. wet-extraction for arsenic novel process explore [J]. non-ferrous metal (Smelting Part), 1994 (3): 3 ~ 4).Due to As
2o
3in water, solubleness is little, prepares white arsenic need to solve the problem that energy consumption is large, cost is high further with the method for evaporation concentration.
Summary of the invention
For overcoming the deficiencies in the prior art, the invention provides a kind of method exempting from the white arsenic of Evaporation preparation of arsenic-containing smoke dust, the characteristic that pentavalent arsenic solubleness is high can be made full use of, under low water consumption and low reaction temperatures, realize the high leaching yield of arsenic, decrease water consumption and energy consumption.
Technical scheme of the present invention is: utilize that the solubleness of arsenic acid in water is large, arsenus acid dissolves low, adds the arsenic acid that the arsenus acid of trivalent is oxidized to pentavalent by oxygenant in the process gone out with water logging.Pass into the arsenus acid that the arsenic acid of pentavalent is reduced to trivalent by reductive agent after purification and impurity removal, after cooling, arsenus acid crystallization is white arsenic.Concrete steps comprise as follows:
(1) heat water to 60 ~ 90 DEG C, under the state stirred, add arsenic-containing smoke dust, hydrogen peroxide and diluted acid successively in water, the pH value that diluted acid controls mixing solutions is 1 ~ 3, filters after reaction 0.5 ~ 3h, obtains the filter cake containing valuable metal and the solution containing arsenic acid;
(2) to being 4 ~ 7 containing the pH value adding ammoniacal liquor regulator solution in the solution of arsenic acid, be stirring reaction 0.5 ~ 2h under the condition of 40 ~ 70 DEG C at solution temperature, reaction terminates rear filtration, the filtrate obtained and filter cake, and filter cake is the material (recoverable) containing valuable metals such as copper;
(3) pass into containing SO in the filtrate of preparing to step (2)
2---gas carry out reduction reaction, after being cooled to 20 ~ 25 DEG C after completion of the reaction filter, namely filter cake obtains white arsenic product after 60 ~ 80 DEG C of drying 8 ~ 24h.
Described arsenic-containing smoke dust is As
2o
3the flue dust of > 30 wt%.
In described step (1), the solid-to-liquid ratio of arsenic-containing smoke dust and water is 1:2 ~ 8g/ml.
Described diluted acid is the one in the sulfuric acid of concentration 10 ~ 20wt%, hydrochloric acid or nitric acid.
The concentration of described hydrogen peroxide is 25 ~ 30wt%, and add-on is 1.8 ~ 3.0 times of arsenic weight in arsenic-containing smoke dust.
Described ammoniacal liquor is industrial ammonia, and industrial ammonia is the aqueous solution containing ammonia 25% ~ 28%.
Described containing SO
2---gas in SO
2---volume be greater than 5%, SO in the gas passed into
2weight be arsenic in solution
0.8 ~ 1.5 times of weight.
Describedly to pass into containing SO
2---the speed of gas be 150 ~ 170L/h.
Principle of the present invention is: utilize that the solubleness of arsenic acid in water is large, arsenus acid dissolves low, adds the arsenic acid that the arsenus acid of trivalent is oxidized to pentavalent by oxygenant in the process gone out with water logging.Pass into the arsenus acid that the arsenic acid of pentavalent is reduced to three by reductive agent after purification and impurity removal, after cooling, arsenus acid crystallization is white arsenic.The filtrate that the product of crystallisation by cooling filters returns leaching, obtains white arsenic product after filtration cakes torrefaction.
The advantage that the present invention possesses and effect:
(1) the high characteristic of pentavalent arsenic solubleness can be made full use of, under low water consumption and low reaction temperatures, realize arsenic
High leaching yield, decrease water consumption and energy consumption;
(2) filtrate after purification of leaching liquor removal of impurities adds smeltery's relieving haperacidity flue gas and pentavalent arsenic acid is reduced to trivalent arsenic acid,
Crystallisation by cooling, crystallized product filters, the white arsenic of dry rear preparation.Process, without the need to carrying out evaporation concentration operation, saves a large amount of energy consumptions.
(3) harmful material of arsenic-containing smoke dust metallurgical process produced is converted into white arsenic product and has reclaimed having in flue dust
Valency metal, realizes resource comprehensive recycle, decreases in commercial run the amount being discharged into arsenic in environment, is conducive to environment protection.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Embodiment one: the method exempting from the white arsenic of Evaporation preparation of the arsenic-containing smoke dust of present embodiment is:
(1) heat water to 85 DEG C, add containing As in water successively under the state stirred
2o
339.6wt%, Pb18.6wt%, H
2flue dust, the concentration of the plumbous metallurgical process generation of O 8wt% are 30wt% hydrogen peroxide (add-on is 2.3 times of arsenic weight in arsenic-containing smoke dust) and diluted acid (sulfuric acid of concentration 10wt%), the pH value controlling mixing solutions is 1.5 reaction 3h, then filter, obtain mainly containing the filter cake of valuable metal and the solution containing arsenic acid;
(2) to being 5 containing the pH value adding ammoniacal liquor regulator solution in the solution of arsenic acid, be stirring reaction 2h under the condition of 70 DEG C at solution temperature, reaction terminates rear filtration, the filtrate obtained and filter cake, and filter cake is the material (recoverable) containing valuable metals such as copper;
(3) pass into containing SO in the filtrate of preparing to step (2)
2---gas (SO in gas
2---volume 8%, SO in the gas passed into
2weight be 1.5 times of the weight of arsenic in solution, pass into containing SO
2---the speed of gas be 160L/h) carry out reduction reaction, filter after being cooled to 24 DEG C after completion of the reaction, namely filter cake obtains white arsenic product after 80 DEG C of dry 20h, As
2o
3content is 99.2%.
Embodiment two: the method exempting from the white arsenic of Evaporation preparation of the arsenic-containing smoke dust of present embodiment is:
(1) heat water to 90 DEG C, under the state stirred, in water, add As successively
2o
3the arsenic-containing smoke dust of 38 wt%, concentration are 28wt% hydrogen peroxide (add-on is 1.8 times of arsenic weight in arsenic-containing smoke dust) and diluted acid (concentration 15wt% hydrochloric acid), the pH value controlling mixing solutions is 1 reaction 2h, then filter, obtain mainly containing the filter cake of valuable metal and the solution containing arsenic acid;
(2) to being 4 containing the pH value adding ammoniacal liquor regulator solution in the solution of arsenic acid, be stirring reaction 1h under the condition of 40 DEG C at solution temperature, reaction terminates rear filtration, the filtrate obtained and filter cake, and filter cake is the material (recoverable) containing valuable metals such as copper;
(3) pass into containing SO in the filtrate of preparing to step (2)
2---gas (SO in gas
2---volume 7%, SO in the gas passed into
2weight be 1 times of the weight of arsenic in solution, pass into containing SO
2---the speed of gas be 150L/h) carry out reduction reaction, filter after being cooled to 25 DEG C after completion of the reaction, namely filter cake obtains white arsenic product after 60 DEG C of dry 24h, As
2o
3content is 99.5%.
Embodiment three: the method exempting from the white arsenic of Evaporation preparation of the arsenic-containing smoke dust of present embodiment is:
(1) heat water to 60 DEG C, under the state stirred, in water, add As successively
2o
3the arsenic-containing smoke dust of 41 wt%, concentration are 25wt% hydrogen peroxide (add-on is 3.0 times of arsenic weight in arsenic-containing smoke dust) and diluted acid (nitric acid of concentration 20wt%), the pH value controlling mixing solutions is 3 reaction 0.5h, then filter, obtain mainly containing the filter cake of valuable metal and the solution containing arsenic acid;
(2) to being 7 containing the pH value adding ammoniacal liquor regulator solution in the solution of arsenic acid, be stirring reaction 0.5h under the condition of 60 DEG C at solution temperature, reaction terminates rear filtration, the filtrate obtained and filter cake, and filter cake is the material (recoverable) containing valuable metals such as copper;
(3) pass into containing SO in the filtrate of preparing to step (2)
2---gas (SO in gas
2---volume 6%, SO in the gas passed into
2weight be 0.8 times of the weight of arsenic in solution, pass into containing SO
2---the speed of gas be 170L/h) carry out reduction reaction, filter after being cooled to 20 DEG C after completion of the reaction, namely filter cake obtains white arsenic product after 70 DEG C of dry 8h, As
2o
3content is 99.4%.
Above the specific embodiment of the present invention is explained in detail, but the present invention is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from present inventive concept.
Claims (7)
1. the method exempting from the white arsenic of Evaporation preparation of arsenic-containing smoke dust, is characterized in that comprising the following steps:
(1) heat water to 60 ~ 90 DEG C, under the state stirred, add arsenic-containing smoke dust, hydrogen peroxide and diluted acid successively in water, the pH value that diluted acid controls mixing solutions is 1 ~ 3, filters after reaction 0.5 ~ 3h, obtains the filter cake containing valuable metal and the solution containing arsenic acid;
(2) to being 4 ~ 7 containing the pH value adding ammoniacal liquor regulator solution in the solution of arsenic acid, be stirring reaction 0.5 ~ 2h under the condition of 40 ~ 70 DEG C at solution temperature, reaction terminates rear filtration, the filtrate obtained and the filter cake containing copper;
(3) pass into containing SO in the filtrate of preparing to step (2)
2---gas carry out reduction reaction, after being cooled to 20 ~ 25 DEG C after completion of the reaction filter, namely filter cake obtains white arsenic after 60 ~ 80 DEG C of drying 8 ~ 24h.
2. the method exempting from the white arsenic of Evaporation preparation of arsenic-containing smoke dust according to claim 1, is characterized in that: described arsenic-containing smoke dust is As
2o
3the flue dust of > 30 wt%.
3. the method exempting from the white arsenic of Evaporation preparation of arsenic-containing smoke dust according to claim 1, is characterized in that: in described step (1), the solid-to-liquid ratio of arsenic-containing smoke dust and water is 1:2 ~ 8g/ml.
4. the method exempting from the white arsenic of Evaporation preparation of arsenic-containing smoke dust according to claim 1, is characterized in that: described diluted acid is the sulfuric acid of concentration 10 ~ 20wt%, hydrochloric acid or nitric acid.
5. the method exempting from the white arsenic of Evaporation preparation of arsenic-containing smoke dust according to claim 1, is characterized in that: the concentration of described hydrogen peroxide is 25 ~ 30wt%, and add-on is 1.8 ~ 3.0 times of arsenic weight in arsenic-containing smoke dust.
6. the method exempting from the white arsenic of Evaporation preparation of arsenic-containing smoke dust according to claim 1, is characterized in that: described containing SO
2---gas in SO
2---volume be greater than 5%, SO in the gas passed into
2weight be 0.8 ~ 1.5 times of the weight of arsenic in solution.
7. the method exempting from the white arsenic of Evaporation preparation of arsenic-containing smoke dust according to claim 6, is characterized in that: described in pass into containing SO
2---the speed of gas be 150 ~ 170L/h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310377631.0A CN103449517B (en) | 2013-08-27 | 2013-08-27 | Method for preparing white arsenic from arsenic-containing dust in evaporation-free manner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106268179B (en) * | 2016-08-25 | 2018-09-07 | 长沙有色冶金设计研究院有限公司 | A kind of energy saving technique and system of synthetical recovery sulfuric acid purification spent acid |
| CN106834676B (en) * | 2016-12-21 | 2017-11-14 | 中南大学 | A kind of method that valuable metal and arsenic recycling harmlessness disposing are reclaimed from arsenic-containing smoke dust |
| CN106834718B (en) * | 2016-12-21 | 2017-11-14 | 中南大学 | A kind of arsenic-containing smoke dust comprehensive utilization and the method for arsenic harmlessness disposing |
| CN106834711B (en) * | 2016-12-21 | 2017-11-14 | 中南大学 | A kind of method for reclaiming in the flue dust from tellurium containing arsenic and preparing high purity tellurium |
| CN106834707B (en) * | 2016-12-21 | 2019-03-26 | 中南大学 | A kind of method that arsenic-containing material synthetical recovery and arsenic resource utilize |
| CN106801151B (en) * | 2017-01-22 | 2019-05-07 | 中国恩菲工程技术有限公司 | The method of flyash reduction melting enriched germanium |
| CN107523702B (en) * | 2017-08-23 | 2019-03-19 | 中南大学 | A kind of method that the pressure oxidation of sodium salt system prepares sodium pyroantimonate |
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|---|---|---|---|---|
| CN85107157A (en) * | 1985-09-18 | 1987-04-01 | 广西冶金研究所 | Wet method is extracted white arsenic from arsenic-containing smoke dust |
| CN1101010A (en) * | 1994-06-10 | 1995-04-05 | 大厂矿务局来宾冶炼厂 | Wet method for preparation of sodium arsenate from fume containing arsenic |
-
2013
- 2013-08-27 CN CN201310377631.0A patent/CN103449517B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85107157A (en) * | 1985-09-18 | 1987-04-01 | 广西冶金研究所 | Wet method is extracted white arsenic from arsenic-containing smoke dust |
| CN1101010A (en) * | 1994-06-10 | 1995-04-05 | 大厂矿务局来宾冶炼厂 | Wet method for preparation of sodium arsenate from fume containing arsenic |
Non-Patent Citations (1)
| Title |
|---|
| 有色冶金工业含砷烟尘处理及利用研究进展;赵思佳;《湖南有色金属》;20120630;第28卷(第3期);第21页第2.3节 * |
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