CN104645543A - Treatment method of oxidized slag containing zinc and cadmium - Google Patents
Treatment method of oxidized slag containing zinc and cadmium Download PDFInfo
- Publication number
- CN104645543A CN104645543A CN201410183797.3A CN201410183797A CN104645543A CN 104645543 A CN104645543 A CN 104645543A CN 201410183797 A CN201410183797 A CN 201410183797A CN 104645543 A CN104645543 A CN 104645543A
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- China
- Prior art keywords
- cadmium
- zinc
- reactor
- acid
- base value
- 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.)
- Granted
Links
- 239000002893 slag Substances 0.000 title claims abstract description 45
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 40
- 239000011701 zinc Substances 0.000 title claims abstract description 40
- 229910052793 cadmium Inorganic materials 0.000 title claims abstract description 37
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 239000000126 substance Substances 0.000 claims abstract description 8
- 230000001590 oxidative effect Effects 0.000 claims description 36
- 239000000243 solution Substances 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 23
- 238000013019 agitation Methods 0.000 claims description 15
- 239000000376 reactant Substances 0.000 claims description 15
- 238000003672 processing method Methods 0.000 claims description 9
- CJDPJFRMHVXWPT-UHFFFAOYSA-N barium sulfide Chemical compound [S-2].[Ba+2] CJDPJFRMHVXWPT-UHFFFAOYSA-N 0.000 claims description 8
- 229910052979 sodium sulfide Inorganic materials 0.000 claims description 8
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 5
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000002386 leaching Methods 0.000 abstract description 17
- 239000002245 particle Substances 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000003756 stirring Methods 0.000 abstract description 2
- 239000002244 precipitate Substances 0.000 abstract 3
- 229910052717 sulfur Inorganic materials 0.000 abstract 3
- 239000011593 sulfur Substances 0.000 abstract 3
- -1 sulfur ions Chemical class 0.000 abstract 3
- 239000003513 alkali Substances 0.000 abstract 2
- 238000001514 detection method Methods 0.000 description 18
- 239000002920 hazardous waste Substances 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052785 arsenic Inorganic materials 0.000 description 6
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 238000012850 discrimination method Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000011133 lead Substances 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- 230000001988 toxicity Effects 0.000 description 3
- 231100000419 toxicity Toxicity 0.000 description 3
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 3
- 229960001763 zinc sulfate Drugs 0.000 description 3
- 229910000368 zinc sulfate Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- CEKJAYFBQARQNG-UHFFFAOYSA-N cadmium zinc Chemical compound [Zn].[Cd] CEKJAYFBQARQNG-UHFFFAOYSA-N 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
- A62D3/33—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents by chemical fixing the harmful substance, e.g. by chelation or complexation
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/40—Inorganic substances
- A62D2101/43—Inorganic substances containing heavy metals, in the bonded or free state
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a treatment method of oxidized slag containing zinc and cadmium, belonging to the technical field of waste treatment. The treatment method comprises the steps of in the presence of strong alkali, carrying out sufficient reaction on zinc, cadmium and sulfur ions to generate larger-particle precipitates so as to absorb small-particle substances generated in the following steps; then in the presence of weak alkali, fully stirring, breaking the balance of zinc and cadmium absorbed in the oxidized slag, sufficiently releasing contained zinc and cadmium to continuously react with the sulfur ion to generate small-particle precipitates which are absorbed by the large-particle precipitates generated in the former step; and finally, adjusting to be in certain acidity and alkalinity range, and ensuring full reaction of the remaining zinc and cadmium with the sulfur ions. The treatment method disclosed by the invention has the advantages that the leaching contents of zinc and cadmium in the oxidized slag are reduced, so that the risks and the potential safety hazards caused to the environment are alleviated.
Description
Technical field
The invention belongs to waste processing arts, be specifically related to a kind of processing method of the oxidizing slag containing zinc, cadmium.
Background technology
In the industrial production, add sulfuric acid dissolution after material oxidation zinc impregnation slurry and obtain solution of zinc sulfate; And while solution of zinc sulfate obtains cleaner solution of zinc sulfate after iron removal by oxidation demanganization, along with the generation of oxidizing slag.Containing the harmful substance such as zinc, cadmium in this oxidizing slag, through detecting the leaching too high levels of the harmful substance such as zinc, lead finding this waste residue, belong to hazardous waste, if not treated direct discharge, will inevitably impact environmental quality, bring the harm being difficult to reverse even to the living space of people and health, there is very large environmental risk and potential safety hazard.Thus, advanced treating must be carried out to this oxidizing slag, reduce the leaching content of zinc in this waste residue and the harmful substance such as plumbous, and from reaching the object reducing and even eliminate environmental risk and potential safety hazard.
Summary of the invention
The invention provides a kind of processing method of oxidizing slag containing zinc, cadmium, the method can reduce the leaching content of the harmful substance such as zinc and cadmium in the oxidizing slag containing zinc, cadmium, thus reduce risk and potential safety hazard that environment is caused.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
A processing method for oxidizing slag containing zinc, cadmium, the method comprises the following steps:
A, in reactor, add pending oxidizing slag and solution A under agitation, and by the addition of these two kinds of reactants, the acid-base value controlling material in reactor is not less than pH=14, and the time is no less than 10 minutes; Wherein, described substance A is the aqueous solution of alkaline earth sulfide;
B, step A reaction after, continue in reactor, to add pending oxidizing slag and solution A under agitation, and pass through the addition of these two kinds of reactants, control the acid-base value of material in reactor in the scope of 7≤pH < 9, the time is no less than 10 minutes;
C, after step B reaction, continue in reactor, to add pending oxidizing slag and solution A under agitation, and by the addition of these two kinds of reactants, the acid-base value controlling liquid in reactor reaches 9≤pH≤10;
Slag charge in D, filtering reactor after step C reaction.
Further, described solution A refers to a kind of in barium sulfide solution and sodium sulfide solution or both mixtures.
Owing to adopting technique scheme, the present invention has following beneficial effect:
The present invention adopts first under basic conditions, makes zinc, cadmium and sulphion fully react the sediment generating larger particles, to absorb the finely ground particle substance next produced; And then under weak base condition, abundant stirring, break adsorb in the oxidizing slag containing zinc, cadmium zinc, cadmium balance, the zinc making it contain, cadmium fully discharge to continue to react with sulphion and produce granule sediment, and are adsorbed by the bulky grain sediment produced before; Finally be adjusted to again within the scope of certain acid-base value, guarantee the method that remaining zinc, cadmium fully can react with sulphion, reduce the leaching content of zinc and cadmium in the oxidizing slag containing zinc, cadmium, thus reduce risk and potential safety hazard that environment is caused.
Detailed description of the invention
Embodiment 1
A processing method for oxidizing slag containing zinc, cadmium, the method comprises the following steps:
A, in reactor, add pending oxidizing slag and barium sulfide solution under agitation, by the acid-base value of material in pH detection paper reactor, the acid-base value that pH detection paper shows this material does not in this way reach pH=14, then by the addition of these two kinds of reactants of adjustment, make its acid-base value be not less than pH=14, the time is 10 minutes;
B, step A reaction after, continue in reactor, to add pending oxidizing slag and barium sulfide solution under agitation, by the acid-base value of material in pH detection paper reactor, pH detection paper shows the acid-base value of this material in the scope of 7≤pH < 9 in this way, then by the addition of these two kinds of reactants of adjustment, make its acid-base value in the scope of 7≤pH < 9, the time is 10 minutes;
C, step B reaction after, continue in reactor, to add pending oxidizing slag and barium sulfide solution under agitation, by the acid-base value of material in pH detection paper reactor, pH detection paper shows the acid-base value of this material is not in this way pH=10, then by the addition of these two kinds of reactants of adjustment, its acid-base value is made to be pH=10;
Slag charge in D, filtering reactor after step C reaction.
According to " hazardous waste judging standard, leaching characteristic identification " (GB5080.3-2007) and " hazardous waste judging standard, corrosivity is differentiated " discrimination method of (GB5085.1-2007), to carrying out toxicity discriminating and corrosivity discriminating before and after the oxidizing slag process containing zinc, cadmium in the present embodiment respectively, it the results are shown in Table 1.
Table 1 solid waste leaching test result
(unit: wherein, the unit of copper, lead, zinc, cadmium is mg/L; PH value is dimensionless; The unit of arsenic is μ g/L)
As can be seen from the above table, by the process of the present embodiment, not only can reduce the leaching content of zinc and cadmium in the oxidizing slag containing zinc, cadmium, also can reduce the leaching content of copper, lead, arsenic, reduce risk and potential safety hazard that environment is caused as much as possible.
Embodiment 2
A processing method for oxidizing slag containing zinc, cadmium, the method comprises the following steps:
A, in reactor, add pending oxidizing slag and sodium sulfide solution under agitation, by the acid-base value of material in pH detection paper reactor, the acid-base value that pH detection paper shows this material does not in this way reach pH=14, then by the addition of these two kinds of reactants of adjustment, make its acid-base value be not less than pH=14, the time is 12 minutes;
B, step A reaction after, continue in reactor, to add pending oxidizing slag and sodium sulfide solution under agitation, by the acid-base value of material in pH detection paper reactor, pH detection paper shows the acid-base value of this material in the scope of 7≤pH < 9 in this way, then by the addition of these two kinds of reactants of adjustment, make its acid-base value in the scope of 7≤pH < 9, the time is 16 minutes;
C, step B reaction after, continue in reactor, to add pending oxidizing slag and sodium sulfide solution under agitation, by the acid-base value of material in pH detection paper reactor, pH detection paper shows the acid-base value of this material is not in this way pH=9, then by the addition of these two kinds of reactants of adjustment, its acid-base value is made to be pH=9;
Slag charge in D, filtering reactor after step C reaction.
According to " hazardous waste judging standard, leaching characteristic identification " (GB5080.3-2007) and " hazardous waste judging standard, corrosivity is differentiated " discrimination method of (GB5085.1-2007), to carrying out toxicity discriminating and corrosivity discriminating before and after the oxidizing slag process containing zinc, cadmium in the present embodiment respectively, it the results are shown in Table 2.
Table 2 solid waste leaching test result
(unit: wherein, the unit of copper, lead, zinc, cadmium is mg/L; PH value is dimensionless; The unit of arsenic is μ g/L)
As can be seen from the above table, by the process of the present embodiment, not only can reduce the leaching content of zinc and cadmium in the oxidizing slag containing zinc, cadmium, also can reduce the leaching content of copper, lead, arsenic, reduce risk and potential safety hazard that environment is caused as much as possible.
Embodiment 3
A processing method for oxidizing slag containing zinc, cadmium, the method comprises the following steps:
A, in reactor, add pending oxidizing slag, barium sulfide solution and sodium sulfide solution under agitation, by the acid-base value of material in pH detection paper reactor, the acid-base value that pH detection paper shows this material does not in this way reach pH=14, then by the addition of these three kinds of reactants of adjustment, make its acid-base value be not less than pH=14, the time is 10 minutes;
B, step A reaction after, continue in reactor, to add pending oxidizing slag, barium sulfide solution and sodium sulfide solution under agitation, by the acid-base value of material in pH detection paper reactor, pH detection paper shows the acid-base value of this material in the scope of 7≤pH < 9 in this way, then by the addition of these three kinds of reactants of adjustment, make its acid-base value in the scope of 7≤pH < 9, the time is 12 minutes;
C, step B reaction after, continue in reactor, to add pending oxidizing slag, barium sulfide solution and sodium sulfide solution under agitation, by the acid-base value of material in pH detection paper reactor, pH detection paper shows the acid-base value of this material is not in this way pH=10, then by the addition of these three kinds of reactants of adjustment, its acid-base value is made to be pH=10;
Slag charge in D, filtering reactor after step C reaction.
According to " hazardous waste judging standard, leaching characteristic identification " (GB5080.3-2007) and " hazardous waste judging standard, corrosivity is differentiated " discrimination method of (GB5085.1-2007), to carrying out toxicity discriminating and corrosivity discriminating before and after the oxidizing slag process containing zinc, cadmium in the present embodiment respectively, it the results are shown in Table 3.
Table 3 solid waste leaching test result
(unit: wherein, the unit of copper, lead, zinc, cadmium is mg/L; PH value is dimensionless; The unit of arsenic is μ g/L)
As can be seen from upper table 3, by the process of the present embodiment, not only can reduce the leaching content of zinc and cadmium in the oxidizing slag containing zinc, cadmium, also can reduce the leaching content of copper, lead, arsenic, reduce risk and potential safety hazard that environment is caused as much as possible.
Claims (2)
1. a processing method for the oxidizing slag containing zinc, cadmium, is characterized in that comprising the following steps:
A, in reactor, add pending oxidizing slag and solution A under agitation, and by the addition of these two kinds of reactants, the acid-base value controlling material in reactor is not less than pH=14, and the time is no less than 10 minutes; Wherein, described substance A is the aqueous solution of alkaline earth sulfide;
B, step A reaction after, continue in reactor, to add pending oxidizing slag and solution A under agitation, and pass through the addition of these two kinds of reactants, control the acid-base value of material in reactor in the scope of 7≤pH < 9, the time is no less than 10 minutes;
C, after step B reaction, continue in reactor, to add pending oxidizing slag and solution A under agitation, and by the addition of these two kinds of reactants, the acid-base value controlling liquid in reactor reaches 9≤pH≤10;
Slag charge in D, filtering reactor after step C reaction.
2. a kind of processing method of oxidizing slag containing zinc, cadmium according to claim 1, is characterized in that described solution A refers to a kind of in barium sulfide solution and sodium sulfide solution or both mixtures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410183797.3A CN104645543B (en) | 2014-05-04 | 2014-05-04 | Processing method containing zinc, the oxidizing slag of cadmium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410183797.3A CN104645543B (en) | 2014-05-04 | 2014-05-04 | Processing method containing zinc, the oxidizing slag of cadmium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104645543A true CN104645543A (en) | 2015-05-27 |
| CN104645543B CN104645543B (en) | 2017-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410183797.3A Expired - Fee Related CN104645543B (en) | 2014-05-04 | 2014-05-04 | Processing method containing zinc, the oxidizing slag of cadmium |
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| Country | Link |
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| CN (1) | CN104645543B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1270146A (en) * | 1999-04-08 | 2000-10-18 | 柳州市环境保护科学研究所 | Process for treating sewage containing Zn and Cd |
| CN1549794A (en) * | 2001-09-03 | 2004-11-24 | 株式会社阿库泰克 | Method of treating heavy-metal-containing wastewater with sulfidizing agent and treatment apparatus |
| US6955638B1 (en) * | 2001-04-09 | 2005-10-18 | Atkins Don C | Process for disposing of solvent-containing liquids |
| CN101451198A (en) * | 2007-11-29 | 2009-06-10 | 黄石理工学院 | Method for recovering zinc and lead from waste electrolysis anode sludge |
| CN102994764A (en) * | 2012-11-30 | 2013-03-27 | 河南豫光金铅股份有限公司 | Process for recovering lead, zinc and cadmium in soot on recovery section in process of treating waste acid generated in lead smelting |
| CN103467154A (en) * | 2013-08-14 | 2013-12-25 | 中国人民解放军济南军区72465部队 | Safety disposal and resource utilization method of lead-containing energetic material |
-
2014
- 2014-05-04 CN CN201410183797.3A patent/CN104645543B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1270146A (en) * | 1999-04-08 | 2000-10-18 | 柳州市环境保护科学研究所 | Process for treating sewage containing Zn and Cd |
| US6955638B1 (en) * | 2001-04-09 | 2005-10-18 | Atkins Don C | Process for disposing of solvent-containing liquids |
| CN1549794A (en) * | 2001-09-03 | 2004-11-24 | 株式会社阿库泰克 | Method of treating heavy-metal-containing wastewater with sulfidizing agent and treatment apparatus |
| CN101451198A (en) * | 2007-11-29 | 2009-06-10 | 黄石理工学院 | Method for recovering zinc and lead from waste electrolysis anode sludge |
| CN102994764A (en) * | 2012-11-30 | 2013-03-27 | 河南豫光金铅股份有限公司 | Process for recovering lead, zinc and cadmium in soot on recovery section in process of treating waste acid generated in lead smelting |
| CN103467154A (en) * | 2013-08-14 | 2013-12-25 | 中国人民解放军济南军区72465部队 | Safety disposal and resource utilization method of lead-containing energetic material |
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| Publication number | Publication date |
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| CN104645543B (en) | 2017-11-17 |
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Granted publication date: 20171117 Termination date: 20180504 |