CN106011475B - A kind of low concentration arsenic-containing waste residue harmless treatment and the method for arsenic recycling - Google Patents
A kind of low concentration arsenic-containing waste residue harmless treatment and the method for arsenic recycling Download PDFInfo
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- CN106011475B CN106011475B CN201610431490.XA CN201610431490A CN106011475B CN 106011475 B CN106011475 B CN 106011475B CN 201610431490 A CN201610431490 A CN 201610431490A CN 106011475 B CN106011475 B CN 106011475B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
- C22B7/008—Wet processes by an alkaline or ammoniacal leaching
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G28/00—Compounds of arsenic
- C01G28/005—Oxides; Hydroxides; Oxyacids
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B30/00—Obtaining antimony, arsenic or bismuth
- C22B30/04—Obtaining arsenic
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The present invention relates to a kind of methods that low concentration arsenic-containing waste residue harmless treatment and arsenic are recycled, for low concentration arsenic-containing waste residue, the present invention is using multistage alkaline leaching method, in 60~80 DEG C of environment, 10~12h of mechanical agitation, a point three-level gradually leaches, arsenic leaching rate is up to more than 80%, treated, and waste residue arsenic content is less than 0.05%, differentiates limit value less than hazardous waste, construction material can be used as to make raw material.The immersion liquid of alkali containing arsenic passes through the recyclable As of acid adding neutralization precipitation2O3, filter the leachate after precipitation and add ferric sulfate again, generate scorodite (FeAsO4﹒ 2H2O it) precipitates, up to 99%, filtrate cycle utilizes the synthesis arsenic-removing rate of the immersion liquid of alkali containing arsenic.Compared with prior art, overall process non-wastewater discharge of the present invention, simple for process, raw material are easy to get, can processing and recycling of the wide popularization and application in low concentration arsenic-containing solid wastes.
Description
Technical field
The invention belongs to hazardous waste processing and application technology as the second resource field, give up more particularly, to a kind of low concentration containing arsenic
Slag harmlessness processing and the method for arsenic recycling.
Background technology
Arsenic often with the non-ferrous metals association such as tungsten, tin, copper, lead, zinc, antimony, mercury, gold, along with a large amount of exploitations of these metals
And smelting, a large amount of arsenic enter in the arsenic-containing waste residue that smeltery produced million tons per year, however these arsenic-containing waste residues are usually to hoard
The mode of storage is handled.Therefore serious arsenic poisoning event has occurred in domestic multiple areas, produce serious environmental problem.Cause
How this, handle these arsenic-containing waste residues as unavoidable problem.
At present, development a series of curing, stabilization technology copes with the problem.It is mainly a certain amount of by adding
Cement, lime, molysite, aluminium salt etc. stablize the arsenic in waste.But these stabilizer additive amounts are big, and higher price causes to locate
Reason and cost of disposal are high, and treated product increase-volume is unfavorable for final disposal than big.To the better side of processing of arsenic-containing waste residue
While formula is harmless treatment and resource utilization utilizes.Its technology is broadly divided into pyrogenic process and wet method, and pyrogenic process is with oxidation
The methods of roasting, reduction roasting and vacuum baking, As is obtained while processing arsenic-containing waste residue2O3；Wet method is i.e. using salt leaching, alkali
Arsenic, is first transferred in solution, then extracts arsenic compound therein again by leaching or the method for acidleach.But both methods is mostly suitable
For the high concentration arsenic-containing waste residue of arsenic content higher (10~30%), at low concentration arsenic-containing waste residue of the arsenic content less than 3%
It is not high to manage effect unobvious, recycling cost performance.In addition, other compositions such as Al, Fe etc. are to arsenic in low concentration arsenic-containing waste residue
Influence of extraction it is very big, increase the intractability of such arsenic-containing waste residue.
Invention content
The present invention provides one for the problem of low concentration arsenic-containing waste residue is difficult to handle disposition and recycling at this stage
Kind low concentration arsenic-containing waste residue harmless treatment and the method for arsenic recycling.The method of the present invention makes full use of the characteristics of arsenic-containing waste itself
And the advantages of combining multistage alkali leaching, a point three-level gradually leaches, and the first order mainly releases other compositions such as Al, Fe etc. in arsenic-containing waste residue
To the Reverse transcriptase that arsenic leaches, second and third grade is on the basis of the first order relieves inhibition, and efficiently leaching arsenic, makes processing
Arsenic-containing waste residue arsenic content afterwards is less than 500mg/kg, and construction material manufacture raw material resourcesization can be used as to utilize, turned waste into wealth, simultaneously
It can obtain As2O3Product.With significant economic, society and environmental benefit.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of low concentration arsenic-containing waste residue harmless treatment and the method for arsenic recycling, include the following steps：
(1) leaching of level-one alkali is handled：Lye is mixed with arsenic-containing waste residue, 10~12h of mechanical agitation, and separation of solid and liquid obtains level-one
Alkali phase analysis and level-one alkali immersion liquid, level-one alkali immersion liquid supplement lye, continue on for new arsenic-containing waste residue and leach, until alkali immersion liquid arsenic concentration
More than 0.3~0.4g/L, enter step later (5) (namely arsenic precipitation recycling step)；
(2) leaching of two level alkali is handled：Level-one alkali phase analysis is mixed with lye, 10~12h of mechanical agitation, and separation of solid and liquid obtains two level
Alkali phase analysis and two level alkali immersion liquid, two level alkali immersion liquid supplement lye, are recycled and reused for the leaching of level-one alkali phase analysis, until alkali immersion liquid arsenic concentration
More than being entered step after 1.5~2g/L (4) (namely arsenic precipitation recycling step)；
(3) leaching of three-level alkali is handled：Two level alkali phase analysis is mixed with lye, 10~12h of mechanical agitation, and separation of solid and liquid obtains three-level
Alkali phase analysis and three-level alkali immersion liquid, three-level alkali immersion liquid supplement lye, are recycled and reused for the leaching of two level alkali phase analysis, until alkali immersion liquid arsenic concentration
More than (4) (namely arsenic precipitation recycling step) is entered step after 1.5~2g/L, three-level alkali phase analysis has completed dearsenification, can conduct
Construction material manufacture raw material recycles；
(4) mixed base immersion liquid is obtained after mixing the immersion liquid of two level alkali and the immersion liquid of three-level alkali, adds acid for adjusting pH to 1~2, it is mechanical
Stirring reacts 1~2h, precipitates and collect sediment, and product As is obtained after washed drying2O3；
(5) it precipitates and collects the mixed base immersion liquid after sediment, after being mixed with level-one alkali immersion liquid, add in Fe2(SO4)3It is molten
Liquid, mechanical agitation react 1~2h, precipitate and collect sediment, scorodite is obtained after sediment undergoes washing；After collecting sediment
Liquid is back to level-one alkali leaching processing as lye, two level alkali leaching processing soaks processing step with three-level alkali.
The reaction related generally in step (1), (2), (3) is：As2O3+ 6NaOH=2Na3AsO3+3H2O
The key reaction formula that step (4) is related to is：2Na3AsO3+3H2SO4=3Na3AsO3+3H2O+As2O3；
The key reaction formula that step (5) is related to is：2Na3AsO3+Fe2(SO4)3+4H2O=2FeAsO3·2H2O+3Na
SO4。
In level-one alkali leaching processing step, the volume mass of lye and arsenic-containing waste residue is than 3~4L/kg；
In two level alkali leaching processing step, the volume mass of lye and level-one alkali phase analysis is than 3~4L/kg；
In three-level alkali leaching processing step, the volume mass of lye and two level alkali phase analysis is than 3~4L/kg.
The arsenic-containing waste residue be exploitation, roasting, smelt generated in product process containing arsenic containing arsenic ore and production containing arsenic
Solid waste, wherein arsenic mainly exist with oxide and sulphided form；The total content of arsenic is one thousandth to 3 percent.
The lye is sodium hydroxide solution, and pH is 12.5~13.5.
The three-level alkali phase analysis arsenic content is less than 500mg/kg.
In level-one alkali leaching processing step, the temperature that lye is mixed with arsenic-containing waste residue is 60-80 DEG C；
In two level alkali leaching processing step, the temperature that lye is mixed with level-one alkali phase analysis is 60-80 DEG C；
In three-level alkali leaching processing step, the temperature that lye is mixed with two level alkali phase analysis is 60-80 DEG C.
In level-one alkali leaching processing, two level alkali leaching processing and three-level alkali leaching processing step, separation of solid and liquid uses natural subsidence
Mode carry out.
In step (5), by Fe:As molar ratios 2~3:1 adds in Fe2(SO4)3Solution.
Further, in level-one alkali leaching processing step, one is obtained first after lye is mixed simultaneously separation of solid and liquid with arsenic-containing waste residue
Grade 1 alkali immersion liquid of alkali phase analysis and level-one after 1 alkali immersion liquid of level-one supplements lye, continues on for new arsenic-containing waste residue and leaches, obtain one
2 alkali immersion liquid of grade, 2 alkali immersion liquid of level-one are recycled and reused for new arsenic-containing waste residue leaching after supplementing lye, until alkali immersion liquid arsenic concentration is big
In 0.3~0.4g/L, enter step later (5).
Further, in two level alkali leaching processing step, lye with level-one alkali phase analysis is mixed and is obtained first after separation of solid and liquid
The 1 alkali immersion liquid of two level alkali phase analysis and two level after 1 alkali immersion liquid of two level supplements lye, continues on for the leaching of level-one alkali phase analysis, obtains
To 2 alkali immersion liquid of two level, the leaching of level-one alkali phase analysis is recycled and reused for after 2 alkali immersion liquid of two level supplement lye, until alkali immersion liquid arsenic
Concentration is more than 1.5~2g/L, enters step later (4).
Further, in three-level alkali leaching processing step, lye with two level alkali phase analysis is mixed and is obtained first after separation of solid and liquid
The 1 alkali immersion liquid of three-level alkali phase analysis and three-level after 1 alkali immersion liquid of three-level supplements lye, continues on for the leaching of two level alkali phase analysis, obtains
To 2 alkali immersion liquid of three-level, the leaching of two level alkali phase analysis is recycled and reused for after 2 alkali immersion liquid of three-level supplement lye, until alkali immersion liquid arsenic
Concentration is more than 1.5~2g/L, enters step later (4).
Compared with prior art, the present invention has the following advantages and beneficial effects：
1. for the reluctant low concentration arsenic-containing waste residue of other treatment technologies, the present invention provides a kind of multistage alkalinity leachings
The method gone out, the first order release the Reverse transcriptase that other compositions such as Al, Fe etc. leach arsenic in arsenic-containing waste residue, second and third grade
It leaches on the basis of first order leaching, efficiently leaching arsenic；This method can such arsenic-containing waste residue of harmless treatment well, delay
Solution arsenic-containing waste residue hoards storage, the present situation for polluting environment.
2. low concentration arsenic-containing waste residue, after this method harmless treatment, arsenic content is less than 500mg/kg, building can be used as
Material manufacture raw material resourcesization recycle, and turn waste into wealth, while can obtain As2O3With scorodite product.With significant warp
Ji, society and environmental benefit.
Description of the drawings
Fig. 1 is present invention process flow chart.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
It deals with objects and carries golden tailing for what certain gold mine generated, purees, moisture content 13.90 are dehydrated in celadon fine grained
~16.14%, x-ray fluorescence spectrometry (XRF) detection shows the tailing mainly containing the elements such as Si, Al, Fe, Ca, K, the content of arsenic
It is 0.263%, the arsenic in the x-ray diffractometer detection display tailing is mainly with As2O3Form exist, on a small quantity with As2S3、
The forms such as FeAsS exist.
The innoxious and arsenic recovery process of the tailing is as shown in Figure 1, in Fig. 1*Locate dotted line represent sulfuric acid according to demand whether
Addition, remaining dotted line represent cycle, and detailed process is as follows：
(1) sodium hydroxide solution of a concentration of 1.2mol/L and mine tailings are mixed in 3L/kg ratios, heated solution to 60
DEG C, mechanical agitation 12h, natural subsidence separation of solid and liquid obtains the 1 alkali immersion liquid of level-one alkali phase analysis and level-one, 1 alkali immersion liquid of level-one supplement
Continue on for new arsenic-containing waste residue after NaOH solution to leach, obtain 2 alkali immersion liquid of level-one, the immersion liquid of level-one alkali is so recycled and reused for containing arsenic
Waste residue leaches, until 9 times；Level-one alkali phase analysis is equally mixed with the sodium hydroxide solution of 1.2mol/L by volume mass than 3L/kg,
Under the conditions of 60 DEG C, mechanical agitation 12h, separation of solid and liquid obtains the 1 alkali immersion liquid of two level alkali phase analysis and two level, two level alkali immersion liquid supplement
Also the leaching of two level alkali phase analysis is recycled and reused for after NaOH solution, until 9 times；Two level alkali phase analysis again equally with 1.2mol/L hydroxides
Sodium solution is mixed by volume mass than 3L/kg, and under the conditions of 60 DEG C, mechanical agitation 12h, separation of solid and liquid obtains three-level alkali phase analysis and three
1 alkali immersion liquid of grade is also recycled and reused for the leaching of three-level alkali phase analysis after three-level alkali immersion liquid supplement NaOH solution, until 9 times.
(2) 9 alkali immersion liquid of 9 alkali immersion liquid of two level and three-level mixing is 3251.69mg/L containing arsenic concentration, adds acid for adjusting pH extremely
2, mechanic whirl-nett reaction 2h are precipitated and are collected sediment, and product As is obtained after washed drying2O3；After precipitating and collecting sediment
After 9 alkali immersion liquid of 9 alkali immersion liquid of two level and three-level add 9 alkali immersion liquid of level-one (being 701.30mg/L containing arsenic concentration), by Fe:
As molar ratios 3:1 adds in Fe2(SO4)3Solution, mechanic whirl-nett reaction 2h are precipitated and are collected sediment, are obtained after washed drying smelly
Green onion stone.It collects the liquid (arsenic concentration 1.4mg/L) after sediment and is back to the dipped journey of alkali.
It is 99.3% that arsenic-containing waste residue, which averagely goes arsenic rate, and obtained alkali phase analysis averagely containing arsenic 0.04%, is used for after washing is dry
Fire Dinas brickes.
Embodiment 2
It deals with objects same as Example 1.
Innoxious and arsenic recovery process is as shown in Figure 1, in Fig. 1*Place's dotted line represents whether sulfuric acid adds according to demand, remaining
Dotted line represents cycle, and detailed process is as follows：
(1) sodium hydroxide solution of a concentration of 1.2mol/L and mine tailings are mixed in 3L/kg ratios, heated solution to 60
DEG C, mechanical agitation 12h, natural subsidence separation of solid and liquid obtains the 1 alkali immersion liquid of level-one alkali phase analysis and level-one, 1 alkali immersion liquid of level-one supplement
Continue on for arsenic-containing waste residue leaching after NaOH solution, obtain 2 alkali immersion liquid of level-one, the immersion liquid of level-one alkali is so recycled and reused for giving up containing arsenic
Slag leaches, until 16 times；Level-one alkali phase analysis is equally mixed with the sodium hydroxide solution of 1.2mol/L by volume mass than 3L/kg,
Under the conditions of 60 DEG C, mechanical agitation 12h, separation of solid and liquid obtains the 1 alkali immersion liquid of two level alkali phase analysis and two level, two level alkali immersion liquid supplement
Also the leaching of two level alkali phase analysis is recycled and reused for after NaOH solution, until 16 times；Two level alkali phase analysis again equally with 1.2mol/L hydrogen-oxygens
Change sodium solution by volume mass than 3L/kg mix, under the conditions of 60 DEG C, mechanical agitation 12h, separation of solid and liquid obtain three-level alkali phase analysis and
1 alkali immersion liquid of three-level is also recycled and reused for the leaching of three-level alkali phase analysis after three-level alkali immersion liquid supplement NaOH solution, until 16 times.
(2) 16 alkali immersion liquid of 16 alkali immersion liquid of two level and three-level mixing is 3577.59mg/L containing arsenic concentration, adds acid for adjusting pH
It to 1.5, mechanic whirl-nett reaction 2h, precipitates and collects sediment, product As is obtained after washed drying2O3；It precipitates and collects sediment
16 alkali immersion liquid of 16 alkali immersion liquid of two level and three-level afterwards add 16 alkali immersion liquid of level-one (being 1039.53mg/L containing arsenic concentration)
Afterwards, by Fe:As molar ratios 3:1 adds in Fe2(SO4)3Solution, mechanic whirl-nett reaction 2h are precipitated and are collected sediment, washed dry
Scorodite is obtained after dry.It collects the liquid (arsenic concentration 1.7mg/L) after sediment and is back to the dipped journey of alkali.
It is 98.7% that arsenic-containing waste residue, which averagely goes arsenic rate, and obtained alkali phase analysis averagely containing arsenic 0.05%, is used for after washing is dry
Fire Dinas brickes.
The above description of the embodiments is intended to facilitate ordinary skill in the art to understand and use the invention.
Person skilled in the art obviously can easily make these embodiments various modifications, and described herein general
Principle is applied in other embodiment without having to go through creative labor.Therefore, the present invention is not limited to above-described embodiment, abilities
Field technique personnel announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be the present invention's
Within protection domain.
Claims (8)
1. a kind of low concentration arsenic-containing waste residue harmless treatment and the method for arsenic recycling, which is characterized in that include the following steps：
(1) leaching of level-one alkali is handled：Lye is mixed with arsenic-containing waste residue, mechanical agitation, and separation of solid and liquid obtains level-one alkali phase analysis and one
Grade alkali immersion liquid, level-one alkali immersion liquid supplement lye, continues on for new arsenic-containing waste residue and leaches, until alkali immersion liquid arsenic concentration be more than 0.3~
0.4g/L is entered step (5) later；
(2) leaching of two level alkali is handled：Level-one alkali phase analysis is mixed with lye, mechanical agitation, and separation of solid and liquid obtains two level alkali phase analysis and two
Grade alkali immersion liquid, the immersion liquid of two level alkali supplement lye, be recycled and reused for the leaching of level-one alkali phase analysis, until alkali immersion liquid arsenic concentration be more than 1.5~
It is entered step after 2g/L (4)；
(3) leaching of three-level alkali is handled：Two level alkali phase analysis is mixed with lye, mechanical agitation, and separation of solid and liquid obtains three-level alkali phase analysis and three
Grade alkali immersion liquid, the immersion liquid of three-level alkali supplement lye, be recycled and reused for the leaching of two level alkali phase analysis, until alkali immersion liquid arsenic concentration be more than 1.5~
It is entered step after 2g/L (4), three-level alkali phase analysis has completed dearsenification, and construction material manufacture raw material can be used as to recycle；
(4) mixed base immersion liquid is obtained after mixing the immersion liquid of two level alkali and the immersion liquid of three-level alkali, adding acid for adjusting pH, machinery stirs to 1~2
It mixes, precipitate and collects sediment, product As is obtained after washed drying2O3；
(5) it precipitates and collects the mixed base immersion liquid after sediment, after being mixed with level-one alkali immersion liquid, add in Fe2(SO4)3Solution, machine
Tool stirs, and precipitates and collects sediment, scorodite is obtained after sediment undergoes washing；The liquid after sediment is collected as lye reuse
In level-one alkali leaching processing, two level alkali leaching processing processing step is soaked with three-level alkali；
The arsenic-containing waste residue is exploitation, roasting, smelts the solid containing arsenic generated in product process containing arsenic containing arsenic ore and production
Waste, wherein arsenic mainly exist with oxide and sulphided form；The total content of arsenic is one thousandth to 3 percent；
The three-level alkali phase analysis arsenic content is less than 500mg/kg.
2. a kind of low concentration arsenic-containing waste residue harmless treatment according to claim 1 and the method for arsenic recycling, feature exist
In in level-one alkali leaching processing step, the volume mass of lye and arsenic-containing waste residue is than 3~4L/kg；
In two level alkali leaching processing step, the volume mass of lye and level-one alkali phase analysis is than 3~4L/kg；
In three-level alkali leaching processing step, the volume mass of lye and two level alkali phase analysis is than 3~4L/kg.
3. a kind of low concentration arsenic-containing waste residue harmless treatment according to claim 1 and the method for arsenic recycling, feature exist
In the lye is sodium hydroxide solution, and pH is 12.5~13.5.
4. a kind of low concentration arsenic-containing waste residue harmless treatment according to claim 1 and the method for arsenic recycling, feature exist
In in level-one alkali leaching processing step, the temperature that lye is mixed with arsenic-containing waste residue is 60-80 DEG C；
In two level alkali leaching processing step, the temperature that lye is mixed with level-one alkali phase analysis is 60-80 DEG C；
In three-level alkali leaching processing step, the temperature that lye is mixed with two level alkali phase analysis is 60-80 DEG C.
5. a kind of low concentration arsenic-containing waste residue harmless treatment according to claim 1 and the method for arsenic recycling, feature exist
In in step (5), by Fe:As molar ratios 2~3:1 adds in Fe2(SO4)3Solution.
6. a kind of low concentration arsenic-containing waste residue harmless treatment according to claim 1 and the method for arsenic recycling, feature exist
In level-one alkali is soaked in processing step, and lye with arsenic-containing waste residue is mixed and obtains level-one alkali phase analysis and level-one 1 after separation of solid and liquid first
Secondary alkali immersion liquid after 1 alkali immersion liquid of level-one supplement lye, continues on for new arsenic-containing waste residue and leaches, and obtains 2 alkali immersion liquid of level-one, and one
New arsenic-containing waste residue is recycled and reused for after grade 2 alkali immersion liquid supplement lye to leach, until alkali immersion liquid arsenic concentration is more than 0.3~0.4g/L,
It enters step later (5).
7. a kind of low concentration arsenic-containing waste residue harmless treatment according to claim 1 and the method for arsenic recycling, feature exist
In two level alkali is soaked in processing step, and lye with level-one alkali phase analysis is mixed and obtains two level alkali phase analysis and two after separation of solid and liquid first
1 alkali immersion liquid of grade, after 1 alkali immersion liquid of two level supplements lye, continues on for the leaching of level-one alkali phase analysis, obtains 2 alkali leachings of two level
Liquid is recycled and reused for the leaching of level-one alkali phase analysis after 2 alkali immersion liquid of two level supplement lye, until alkali immersion liquid arsenic concentration be more than 1.5~
2g/L is entered step (4) later.
8. a kind of low concentration arsenic-containing waste residue harmless treatment according to claim 1 and the method for arsenic recycling, feature exist
In three-level alkali is soaked in processing step, and lye with two level alkali phase analysis is mixed and obtains three-level alkali phase analysis and three after separation of solid and liquid first
1 alkali immersion liquid of grade, after 1 alkali immersion liquid of three-level supplements lye, continues on for the leaching of two level alkali phase analysis, obtains 2 alkali leachings of three-level
Liquid is recycled and reused for the leaching of two level alkali phase analysis after 2 alkali immersion liquid of three-level supplement lye, until alkali immersion liquid arsenic concentration be more than 1.5~
2g/L is entered step (4) later.
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| CN106673069B (en) * | 2016-12-20 | 2017-12-19 | 中南大学 | A kind of black ferric arsenate crystal and its synthetic method |
| CN106756114B (en) * | 2017-01-20 | 2019-03-15 | 江苏澄天环保科技有限公司 | A kind of cleaning manufacturing technique method and equipment extracting arsenic |
| CN107352581B (en) * | 2017-08-23 | 2018-10-09 | 中南大学 | A kind of method that antimony cigarette ash pressure reduction prepares arsenic trioxide |
| CN107739837B (en) * | 2017-11-01 | 2019-05-10 | 紫金铜业有限公司 | A kind of method of the efficient dearsenification of the high arsenic smoke dust of Copper making |
| CN110306066B (en) * | 2019-07-22 | 2021-07-20 | 山东国大黄金股份有限公司 | Multistage gold extraction method for refractory arsenic-containing gold tailings |
| CN110512095B (en) * | 2019-08-21 | 2020-07-10 | 长沙矿冶研究院有限责任公司 | Method for extracting and stabilizing arsenic from tungsten metallurgy phosphorus arsenic slag |
| CN112692042B (en) * | 2020-12-08 | 2022-05-24 | 广西博世科环保科技股份有限公司 | Aluminum electrolysis cell waste refractory material treatment process and system thereof |
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| CN101954370B (en) * | 2010-09-06 | 2012-12-05 | 同济大学 | Method for recycling arsenic-containing waste residues |
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