CN109482611A - The non-pollution processing method of the slugging containing pozzuolite - Google Patents
The non-pollution processing method of the slugging containing pozzuolite Download PDFInfo
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- CN109482611A CN109482611A CN201811351351.1A CN201811351351A CN109482611A CN 109482611 A CN109482611 A CN 109482611A CN 201811351351 A CN201811351351 A CN 201811351351A CN 109482611 A CN109482611 A CN 109482611A
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- China
- Prior art keywords
- slugging
- coatings
- pozzuolite
- ball
- containing pozzuolite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 238000009491 slugging Methods 0.000 title claims abstract description 49
- 238000003672 processing method Methods 0.000 title claims abstract description 15
- 238000000576 coating method Methods 0.000 claims abstract description 71
- 239000011248 coating agent Substances 0.000 claims abstract description 37
- 229910052785 arsenic Inorganic materials 0.000 claims abstract description 35
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims abstract description 34
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 24
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 24
- 239000004571 lime Substances 0.000 claims abstract description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000011324 bead Substances 0.000 claims abstract description 15
- 229910052802 copper Inorganic materials 0.000 claims abstract description 15
- 239000010949 copper Substances 0.000 claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000002386 leaching Methods 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000440 bentonite Substances 0.000 claims abstract description 8
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 8
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000004458 analytical method Methods 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 238000000227 grinding Methods 0.000 claims abstract description 7
- 229910052742 iron Inorganic materials 0.000 claims abstract description 7
- 238000005453 pelletization Methods 0.000 claims abstract description 7
- 238000006864 oxidative decomposition reaction Methods 0.000 claims abstract description 6
- 238000004064 recycling Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 18
- GOLCXWYRSKYTSP-UHFFFAOYSA-N arsenic trioxide Inorganic materials O1[As]2O[As]1O2 GOLCXWYRSKYTSP-UHFFFAOYSA-N 0.000 claims description 17
- 239000002893 slag Substances 0.000 claims description 17
- RMBBSOLAGVEUSI-UHFFFAOYSA-H Calcium arsenate Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-][As]([O-])([O-])=O.[O-][As]([O-])([O-])=O RMBBSOLAGVEUSI-UHFFFAOYSA-H 0.000 claims description 8
- 229940103357 calcium arsenate Drugs 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 5
- 239000011707 mineral Substances 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 26
- 239000010410 layer Substances 0.000 description 25
- 230000008569 process Effects 0.000 description 16
- XPDICGYEJXYUDW-UHFFFAOYSA-N tetraarsenic tetrasulfide Chemical compound S1[As]2S[As]3[As]1S[As]2S3 XPDICGYEJXYUDW-UHFFFAOYSA-N 0.000 description 12
- 239000002699 waste material Substances 0.000 description 12
- 238000007711 solidification Methods 0.000 description 7
- 230000008023 solidification Effects 0.000 description 7
- 230000001698 pyrogenic effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- DJHGAFSJWGLOIV-UHFFFAOYSA-K Arsenate3- Chemical compound [O-][As]([O-])([O-])=O DJHGAFSJWGLOIV-UHFFFAOYSA-K 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 229940000489 arsenate Drugs 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000834 fixative Substances 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002574 poison Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate group Chemical group S(=O)(=O)([O-])[O-] QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- HJTAZXHBEBIQQX-UHFFFAOYSA-N 1,5-bis(chloromethyl)naphthalene Chemical compound C1=CC=C2C(CCl)=CC=CC2=C1CCl HJTAZXHBEBIQQX-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 208000031320 Teratogenesis Diseases 0.000 description 1
- GYYLHZUIHDISBV-UHFFFAOYSA-N [Ca].O[As](O)(O)=O Chemical compound [Ca].O[As](O)(O)=O GYYLHZUIHDISBV-UHFFFAOYSA-N 0.000 description 1
- LAISNASYKAIAIK-UHFFFAOYSA-N [S].[As] Chemical compound [S].[As] LAISNASYKAIAIK-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- -1 arsenic sulfide slag Chemical compound 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229910001779 copper mineral Inorganic materials 0.000 description 1
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- WBZKQQHYRPRKNJ-UHFFFAOYSA-L disulfite Chemical compound [O-]S(=O)S([O-])(=O)=O WBZKQQHYRPRKNJ-UHFFFAOYSA-L 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000002703 mutagenesis Methods 0.000 description 1
- 231100000350 mutagenesis Toxicity 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B1/00—Dumping solid waste
- B09B1/004—Covering of dumping sites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- 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
- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
- C22B15/0065—Leaching or slurrying
- C22B15/0067—Leaching or slurrying with acids or salts thereof
-
- 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
- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
- C22B15/0084—Treating solutions
- C22B15/0089—Treating solutions by chemical methods
- C22B15/0091—Treating solutions by chemical methods by cementation
-
- 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
- C22B7/007—Wet processes by acid leaching
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses the non-pollution processing methods of the slugging containing pozzuolite, it is the following steps are included: (1), the preparation of the ball of slugging containing pozzuolite: slugging containing pozzuolite, water and bentonite stir evenly, and bead is made；(2), pelletizing covering: bead wraps up in one layer of curing agent white lime after drying, in its appearance；(3), coating ball roasting: under aerobic conditions oxidative decomposition occurs for slugging containing pozzuolite；(4), removing coating from coated spheres: grinding coating ball, and coatings and kernel separate；(5), coatings fill: will be under the coatings landfill of removing；(6), kernel is ground, metallic copper is recycled by acidleach, iron replacement, phase analysis stores up landfill together with coatings.The beneficial effects of the invention are as follows the arsenic minerals in coatings preferably to be fixed, and copper leaching rate is 65-70% or so, and copper has obtained effective recycling.
Description
Technical field
The present invention relates to the processing methods of the processing method of the dangerous waste containing arsenic, more particularly to the slugging containing pozzuolite.
Background technique
Arsenic and its compound have extensive toxic action to people and other organic life entities；For plant, the poison of arsenic
Evil effect shows the moisture conveying for inhibiting plant, destroys the generally acknowledged teratogenesis of leaf, the carcinogenic and mutagenesis factor.In the smelting of arsenic
During the production and application of refining and its compound, a large amount of arsenide is introduced into environment, and polluted source is detrimental to health, because
This people has given very big concern to arsenic poison harm.China's " industry hygiene standard " regulation: arsenic highest permits in the surface water
Perhaps mass concentration is 0.04 mg/L, and the per day highest permission mass concentration of arsenide (based on arsenic) is in the atmosphere of residential block
0.003mg/m3.Industrial " three Waste " discharges tentative standard regulation: arsenic and its inorganic compound highest allow mass concentration to be 0.5
mg/L.Using modern wastewater processing technology, arsenic-containing waste water can be easier to realize qualified discharge, however, smelting process generation is consolidated
Sediment containing arsenic that body arsenic-containing waste and processing waste water, spent acid generate etc. is thorough there is presently no obtaining to the pollution and harm of environment
Bottom radical cure, a large amount of valuable metals are not fully used, and the requirement of the discharge status of arsenic-containing waste and environmental protection administration is still apart
It is very remote.Arsenic-containing waste mostly uses greatly the method processing for hoarding storage for a long time, as high concentration arsenic-containing waste is cumulative, is
It prevents secondary pollution, urgent problem to be solved is become to its harmless treatment.Processing arsenic-containing waste residue and dirt both at home and abroad at present
The common solidification technology of mud is cement solidification, organic polymer solidification, bitumen solidification and pyrogenic process solidification.These processing modes
Not only increase business burden, but also causes the significant wastage of resource.In the production processes such as metallurgical industry, chemical industry, solution
Dearsenification is handled frequently with sulphide precipitation, to generate the high arsenic sulfide slag of arsenic content.Arsenide be both extremely toxic substance and
Indispensable resource in the national economic development.Therefore, needs and the state of environmental protection are not only made from arsenic-containing waste residue recycling arsenic
The needs of people's sustainable economic development.Currently, being mainly the following processing technique: 1, arsenic sulfide slag produces arsenic trioxide
Processing technique is divided into two major classes, i.e. pyrogenic process and wet process according to its technical characterstic.Pyrogenic process is that the current country recycles three from arsenic sulfide slag
Aoxidize the method that two arsenic most generally use.This technology maturation, process is short, at low cost；But its three oxidation for handling drying regime
Two arsenic, it is difficult to ensure good operating environment, easily cause the secondary pollution of environment, and product purity is low, the arsenic rate of recovery is low.It is wet
Method handle arsenic sulfide slag, i.e., using acidleach, alkali leaching or salt leaching etc. handled, first arsenic is separated from slag, then again into
One step recycles arsenic product or carries out harmless treatment.This technology does not generate dust, is able to satisfy environmental requirement, have low energy consumption,
It pollutes the advantages that small, high-efficient, but its process is complex, processing cost is high.
Chinese invention patent notification number CN102151690B discloses a kind of method for handling arsenic sulfide slag, toward arsenic sulfide slag
Middle addition inorganic flocculating agent liquid, stirs evenly；Solid powder adsorbent is added, is stirred evenly；It is eventually adding asbestos wool stirring.
Although this method can reduce the Leaching of the dangerous wastes containing arsenic such as arsenic sulfide slag, dangerous waste that treated can be directly entered danger
Landfills reduce the harm to environment, but the valuable metal in arsenic sulfide slag is not recycled, and is caused
The waste of resource；For another example Chinese invention patent publication number CN106834736A discloses the separation work of copper and arsenic in arsenic sulfide slag
Skill, vulcanized slag leach to obtain copper concentrate (copper sulfide) and alkaline leaching liquid by Sodium Hydroxide Alkaline.Contain arsenic in leachate, adds
Enter waste acid and carry out heavy arsenic, obtains arsenones precipitating and metabisulfite solution, but it uses wet-treating, it is complex that there are processes,
The high problem of processing cost.
Summary of the invention
The technical problem to be solved by the present invention is to existing arsenic sulfide slag pyrogenic process, wet-treating, there are many drawbacks, or
Solid powder adsorbent is added using inorganic flocculating agent liquid is added into arsenic sulfide slag, valuable metal can not be recycled, mentioned thus
It not will cause secondary pollution for one kind and process be simple, at low cost, the nuisanceless place of the slugging containing pozzuolite of valuable metal can be recycled
Reason method.
The technical scheme is that provide a kind of new non-pollution processing method of slugging containing pozzuolite, it include with
Lower step: (1), the preparation of the ball of slugging containing pozzuolite: slugging containing pozzuolite, water and bentonite are by (180-220): (50-60): (5-15's)
Weight ratio stirs evenly, and the bead of diameter 6mm-10mm is made；(2), pelletizing covering: bead after drying, is wrapped up in its appearance
One layer of curing agent white lime, white lime and the ball weight of slugging containing pozzuolite ratio are (6-7): 1；(3), coating ball roasting: 710 DEG C-
Under the conditions of 730 DEG C, roast 4h-6h, oxidative decomposition occurs under aerobic conditions for slugging containing pozzuolite, generate SO2 gas and
As2O3 gas, SO2 gas and As2O3 gas are reacted with the white lime of coating ectosphere produces calcium sulfate and calcium arsenate respectively；
(4), removing coating from coated spheres: grinding coating ball, and coatings and kernel separate；(5), coatings fill: by the coating of removing
Under layer landfill；(6), kernel is ground, metallic copper, phase analysis heap together with coatings is recycled by acidleach, iron replacement
Deposit landfill.
Arsenic solidification detection is carried out to the coatings of step (4) in above scheme, by coatings respectively pH value be 12.3,
7.0 and 1.0 3 kind under the conditions of leach 72h, leaching liquid-solid ratio is 10:1, leaching rate < 1%.
Pozzuolite slugging, water and bentonitic weight ratio are 200:55:10 in step described in above scheme (1), small
Bulb diameter is 8mm.
White lime and the ball weight of slugging containing pozzuolite ratio are 6.5:1 in step described in above scheme (2).
In step described in above scheme (3) under the conditions of 725 DEG C, 5h is roasted.
It is the oxides such as silicate the beneficial effects of the invention are as follows kernel after coating ball roasting；Outer layer coating layer is sulfate
And arsenate.It is polished to be coated ball, since internal layer is different with outer layer hardness, internal layer and outer layer are easier to separate, in coatings
Arsenic mineral preferably fixed, copper leaching rate is 65-70% or so, and copper has obtained effective recycling.
Detailed description of the invention
Fig. 1 is process flow chart of the invention；
Fig. 2 is the coating spherical structure schematic diagram before roasting in the present invention；
Fig. 3 is the coating spherical structure schematic diagram after present invention roasting.
Specific embodiment
With reference to the accompanying drawings and embodiments, technical scheme in the embodiment of the invention is clearly and completely described.It is aobvious
So, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the reality in the present invention
Apply example, those of ordinary skill in the art's every other embodiment without making creative work belongs to the present invention
Protection scope.
As shown in Figure 1, the non-pollution processing method of the slugging containing pozzuolite, it is the following steps are included: (1), the ball of slugging containing pozzuolite
Preparation: slugging containing pozzuolite, water and bentonite press (180-220): (50-60): the weight ratio of (5-15) stirs evenly, and is made straight
The bead of diameter 6mm-10mm；(2), pelletizing covering: bead wraps up in one layer of curing agent white lime, white lime after drying, in its appearance
It is (6-7) with the ball weight ratio of slugging containing pozzuolite: 1；(3), coating ball roasting: under the conditions of 710 DEG C -730 DEG C, 4h-6h is roasted, is contained
Oxidative decomposition occurs under aerobic conditions for pozzuolite slugging, generates SO2Gas and As2O3Gas, SO2Gas and As2O3Gas
It is reacted with the white lime of coating ectosphere and produces calcium sulfate and calcium arsenate respectively；(4), removing coating from coated spheres: coating ball is ground
Mill, coatings and kernel separate；(5), coatings fill: will be under the coatings landfill of removing；(6), kernel is ground,
Metallic copper is recycled by acidleach, iron replacement, phase analysis stores up landfill together with coatings.
The present invention handles pozzuolite slugging using pelletizing covering roasting oxidation method, realizes the fixation to arsenic mineral, while real
The recycling to copper mineral in pozzuolite slugging is showed.Content is embodied are as follows: (1) pozzuolite slugging and a certain amount of water, swelling will be contained
Soil ball processed after mixing evenly, bead after drying, in one layer of fixative white lime of its outer layer packet, are roasted after drying.(2)
Coating ball after being fired, outer layer is based on calcium sulfate and calcium arsenate, and kernel is based on silicate mineral.(3) removing coating from coated spheres
Afterwards, kernel leaches recycling copper, phase analysis and outer layer stockpiling landfill.
For coating spherical structure before roasting as shown in Fig. 2, internal layer is slugging containing pozzuolite, middle layer is binder bentonite, outer layer
For sulphur arsenic fixative white lime.Ball is coated under the conditions of 710 DEG C -730 DEG C, roasts 4h-6h.Slugging containing pozzuolite exists in roasting process
Oxidative decomposition occurs under aerobic conditions, generates SO2And As2O3Gas.SO2And As2O3The ripe stone of gas and coating ectosphere
Ash reaction produces calcium sulfate and calcium arsenate respectively, and calcium sulfate and arsenic acid calcium stability are stronger, to play the work of fixed sulphur, arsenic
With.After being coated ball roasting, as shown in figure 3, internal layer is the oxides such as silicate；Outer layer is sulfate and arsenate.It is coated ball warp
After grinding, since internal layer is different with outer layer hardness, internal layer and outer layer are easier to separate.
Embodiment 1: the non-pollution processing method of the slugging containing pozzuolite, it is the following steps are included: (1), the ball system of slugging containing pozzuolite
Standby: slugging containing pozzuolite, water and bentonite are stirred evenly by the weight ratio of 180:50:5, and the bead of diameter 6mm is made；(2), ball
Group's coating: bead wraps up in one layer of curing agent white lime after drying, in its appearance, and white lime and the ball weight of slugging containing pozzuolite ratio are 6:
1；(3), coating ball roasting: under the conditions of 710 DEG C, roasting 4h, and under aerobic conditions oxidative decomposition occurs for slugging containing pozzuolite,
Generate SO2Gas and As2O3Gas, SO2Gas and As2O3Gas is reacted with the white lime of coating ectosphere produces calcium sulfate respectively
And calcium arsenate；(4), removing coating from coated spheres: grinding coating ball, and coatings and kernel separate；(5), coatings fill: will shell
From coatings landfill under；(6), kernel is ground, metallic copper, phase analysis and coating is recycled by acidleach, iron replacement
Stockpiling fills layer together.
Embodiment 2: the non-pollution processing method of the slugging containing pozzuolite, it is the following steps are included: (1), the ball system of slugging containing pozzuolite
Standby: slugging containing pozzuolite, water and bentonite are stirred evenly by the weight ratio of 200:55:10, and the bead of diameter 8mm is made；(2),
Pelletizing covering: bead wraps up in one layer of curing agent white lime after drying, in its appearance, and white lime is with the ball weight ratio of slugging containing pozzuolite
6.5:1；(3), coating ball roasting: under the conditions of 725 DEG C, 5h is roasted, under aerobic conditions oxygenolysis occurs for slugging containing pozzuolite
Reaction generates SO2Gas and As2O3Gas, SO2Gas and As2O3Gas is reacted with the white lime of coating ectosphere to be produced respectively
Calcium sulfate and calcium arsenate；(4), removing coating from coated spheres: grinding coating ball, and coatings and kernel separate；(5), coatings are filled out
It buries: will be under the coatings landfill of removing；(6), kernel is ground, metallic copper, phase analysis is recycled by acidleach, iron replacement
Landfill is stored up together with coatings.
Embodiment 3: the non-pollution processing method of the slugging containing pozzuolite, it is the following steps are included: (1), the ball system of slugging containing pozzuolite
Standby: slugging containing pozzuolite, water and bentonite are stirred evenly by the weight ratio of 220:60:15, and the bead of diameter 10mm is made；
(2), pelletizing covering: bead wraps up in one layer of curing agent white lime, white lime and the ball weight of slugging containing pozzuolite after drying, in its appearance
Than for 7:1；(3), coating ball roasting: under the conditions of 730 DEG C, 6h is roasted, oxidation point occurs under aerobic conditions for slugging containing pozzuolite
Solution reaction, generates SO2Gas and As2O3Gas, SO2Gas and As2O3Gas is reacted with the white lime of coating ectosphere gives birth to respectively
Produce calcium sulfate and calcium arsenate；(4), removing coating from coated spheres: grinding coating ball, and coatings and kernel separate；(5), coatings
Landfill: will be under the coatings landfill of removing；(6), kernel is ground, metallic copper, leaching is recycled by acidleach, iron replacement
Slag stores up landfill together with coatings.
The swelling earth elements composition that the present invention uses is as shown in the table:
The commercial lime element composition that the present invention uses is as follows:
Coating ball roasting chemical reaction equation is as follows:
Note: △ G is free energy, and A, B are coefficient, and T is temperature, temperature unit K, K=- 273 DEG C.
The coatings that step (4) obtains are carried out with the solidification detection of arsenic mineral, coatings are respectively 12.3,7.0 in pH value
72h is leached under the conditions of with 1.0 3 kinds, leaching liquid-solid ratio is 10:1, and it is preferably solid to illustrate that arsenic mineral obtains less than 1% for leaching rate
It is fixed.
The present invention overcomes defects existing for pyrogenic process and wet process, with treatment process is nuisanceless, will not generate two to environment
Secondary pollution, and process is simple, it is low in cost, while the noble metal copper in arsenic sulfide slag can be recycled.
Claims (5)
1. the non-pollution processing method of the slugging containing pozzuolite, it is characterized in that it is the following steps are included: (1), the preparation of the ball of slugging containing pozzuolite:
Slugging containing pozzuolite, water and bentonite press (180-220): (50-60): the weight ratio of (5-15) stirs evenly, and diameter is made
The bead of 6mm-10mm；(2), pelletizing covering: bead wraps up in one layer of curing agent white lime after drying, in its appearance, white lime with
The ball weight ratio of slugging containing pozzuolite is (6-7): 1；(3), coating ball roasting: under the conditions of 710 DEG C -730 DEG C, 4h-6h is roasted, contains arsenic
Oxidative decomposition occurs under aerobic conditions for vulcanized slag, generates SO2Gas and As2O3Gas, SO2Gas and As2O3Gas with
The white lime reaction for being coated ectosphere produces calcium sulfate and calcium arsenate respectively；(4), removing coating from coated spheres: grinding coating ball,
Coatings and kernel separate；(5), coatings fill: will be under the coatings landfill of removing；(6), kernel is ground, is led to
Acidleach, iron replacement recycling metallic copper are crossed, phase analysis stores up landfill together with coatings.
2. the non-pollution processing method of the slugging containing pozzuolite as described in claim 1, it is characterized in that the step (4) and step
(5) there are also coatings to detect between, and coatings are leached 72h under the conditions of pH value is 12.3,7.0 and 1.0 3 kind respectively, are leached
Liquid-solid ratio is 10:1, leaching rate < 1%.
3. the non-pollution processing method of the slugging described in claim 1 containing pozzuolite, it is characterized in that pozzuolite in the step (1)
Slag, water and bentonitic weight ratio are 200:55:10, the small ball's diameter 8mm.
4. the non-pollution processing method of the slugging containing pozzuolite as described in claim 1, it is characterized in that white lime in the step (2)
It is 6.5:1 with the ball weight ratio of slugging containing pozzuolite.
5. the non-pollution processing method of the slugging containing pozzuolite as described in claim 1, it is characterized in that 725 in the step (3)
Under the conditions of DEG C, 5h is roasted.
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| CN114212806A (en) * | 2022-01-18 | 2022-03-22 | 贵州红星电子材料有限公司 | Recovery method of nickel cobalt manganese sulfide slag |
| CN116197209A (en) * | 2023-01-17 | 2023-06-02 | 广西凯玺有色金属有限公司 | Cleaning treatment method for calcium arsenate glass solidification and application thereof |
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