CN111760878A - Method for strengthening natural degradation of cyanogen slag - Google Patents
Method for strengthening natural degradation of cyanogen slag Download PDFInfo
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- CN111760878A CN111760878A CN202010588215.5A CN202010588215A CN111760878A CN 111760878 A CN111760878 A CN 111760878A CN 202010588215 A CN202010588215 A CN 202010588215A CN 111760878 A CN111760878 A CN 111760878A
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- cyanide
- house body
- cyanogen
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- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 title claims abstract description 159
- 239000002893 slag Substances 0.000 title claims abstract description 130
- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000015556 catabolic process Effects 0.000 title claims abstract description 17
- 238000006731 degradation reaction Methods 0.000 title claims abstract description 17
- 238000005728 strengthening Methods 0.000 title claims abstract description 9
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims abstract description 70
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 62
- 238000004140 cleaning Methods 0.000 claims abstract description 45
- 238000010521 absorption reaction Methods 0.000 claims abstract description 33
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000012544 monitoring process Methods 0.000 claims abstract description 32
- 238000009423 ventilation Methods 0.000 claims abstract description 31
- 238000005507 spraying Methods 0.000 claims abstract description 29
- 238000001035 drying Methods 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 47
- 238000010438 heat treatment Methods 0.000 claims description 36
- 239000003814 drug Substances 0.000 claims description 25
- 239000007921 spray Substances 0.000 claims description 22
- 238000007791 dehumidification Methods 0.000 claims description 20
- 239000007789 gas Substances 0.000 claims description 16
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 14
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 14
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 12
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 10
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 6
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 6
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 6
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 6
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 claims description 6
- 229940001584 sodium metabisulfite Drugs 0.000 claims description 6
- 235000010262 sodium metabisulphite Nutrition 0.000 claims description 6
- 235000010265 sodium sulphite Nutrition 0.000 claims description 6
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 6
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 6
- 229960001763 zinc sulfate Drugs 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 claims 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract description 15
- 239000003344 environmental pollutant Substances 0.000 abstract description 8
- 231100000719 pollutant Toxicity 0.000 abstract description 8
- 238000000746 purification Methods 0.000 abstract description 6
- 150000002825 nitriles Chemical class 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 3
- 238000002407 reforming Methods 0.000 abstract description 2
- 230000000087 stabilizing effect Effects 0.000 abstract description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 24
- 229910052737 gold Inorganic materials 0.000 description 24
- 239000010931 gold Substances 0.000 description 24
- 229910000831 Steel Inorganic materials 0.000 description 17
- 239000010959 steel Substances 0.000 description 17
- 239000003570 air Substances 0.000 description 9
- 238000002386 leaching Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 231100000419 toxicity Toxicity 0.000 description 8
- 230000001988 toxicity Effects 0.000 description 8
- 238000003825 pressing Methods 0.000 description 7
- 239000007791 liquid phase Substances 0.000 description 6
- 238000000605 extraction Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010981 drying operation Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000005341 toughened glass Substances 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- ZMZDMBWJUHKJPS-UHFFFAOYSA-M Thiocyanate anion Chemical compound [S-]C#N ZMZDMBWJUHKJPS-UHFFFAOYSA-M 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- ZMZDMBWJUHKJPS-UHFFFAOYSA-N hydrogen thiocyanate Natural products SC#N ZMZDMBWJUHKJPS-UHFFFAOYSA-N 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
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- 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
-
- 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
-
- 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
- A62D3/36—Detoxification by using acid or alkaline reagents
-
- 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
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C3/00—Cyanogen; Compounds thereof
- C01C3/08—Simple or complex cyanides of metals
- C01C3/10—Simple alkali metal cyanides
-
- 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
- A62D2101/45—Inorganic substances containing nitrogen or phosphorus
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/20—Waste processing or separation
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the technical field of pollutant treatment methods in the field of environmental protection, and particularly relates to a method for strengthening natural degradation of cyanogen slag; the greenhouse cleaning system, the turner, the agent spraying system and the monitoring system are additionally arranged on the existing closed solar greenhouse, when the cyanide slag is treated, the temperature in the solar greenhouse is kept above 50 ℃, the humidity is in an unsaturated state, the turner is used for distributing and mixing the cyanide slag, the agent spraying system is used for uniformly spraying agents to the cyanide slag, the treatment of the cyanide slag agents and the low-temperature drying treatment are combined, the sprayed agents play a role in removing cyanides or stabilizing heavy metals in the cyanide slag, so that the efficient, economic and clean deep purification treatment of the cyanide slag is realized, a sodium hydroxide absorption tower is additionally arranged at the tail end of a ventilation system and used for absorbing hydrogen cyanide in steam, the safety and the environment protection of the reforming treatment system are guaranteed, and the hydrogen cyanide evaporated from the cyanide slag can be recovered.
Description
Technical Field
The invention belongs to the technical field of pollutant treatment methods in the field of environmental protection, and particularly relates to a method for strengthening natural degradation of cyanogen slag.
Background
In the gold industry, the cyanidation gold extraction process has a history of more than 100 years, but is still the mainstream wet gold leaching process in the global gold industry at present and in the future for a period of time due to the advantages of simple process, high gold recovery rate and the like. Because the production process of the gold industry is different from other industries, the yield of tailings is almost 100%, more than 200 cyanidation gold extraction enterprises in China generate about 1 hundred million tons of cyanogen slag every year at present, and the discharge amount of cyanogen slag is continuously increased every year along with the increase of the mining quantity and the gradual reduction of the mining grade of gold ores in China. The cyanide slag contains cyanide, thiocyanate, heavy metal and other characteristic pollutants, has the characteristics of high toxicity, durability, concealment, difficult treatment and the like, is listed in a hazardous waste record in 2016, and has the problems of warehousing and utilization of the cyanide slag, so that the treatment and the treatment of the cyanide slag are always the focus of attention of the whole industry and are directly related to the survival and the development of various cyaniding enterprises.
At present, the processing method of the cyanogen slag is various, for example, the cause method, the hydrogen peroxide oxidation method, the ozone oxidation method, the water washing method, the high temperature pyrolysis method and the like, the processing targets are generally divided into two, one is that the cyanogen slag generated by the cyaniding gold extraction process can be reasonably and legally piled in a tailing pond, the processed cyanogen slag needs to reach the standard limit value of the treatment of the tailing pond in the technical specification for controlling the cyanogen slag pollution in the gold industry (HJ943 and 2018), the second is that the cyanogen slag can be directly and comprehensively utilized after being processed, for example, filling, building materials and the like are manufactured, and the processed cyanogen slag needs to reach the requirement of backfilling or building materials utilization of the raw materials in the technical specification for controlling the cyanogen slag pollution in the gold industry (HJ943 and 2018). Although some of the above-mentioned methods for treating the cyanogen slag can treat the cyanogen slag to the target requirement, the methods have the defects of high treatment cost, secondary pollution or complicated treatment process, and the like, and most of the defects are caused by the fact that the pollutants distributed in the liquid phase of the cyanogen slag are not treated in place. In the solid-liquid two-phase distribution of the cyanide slag, the proportion of the cyanide existing in the liquid phase is far greater than that of the cyanide existing in the solid phase, so how to reduce the pollutants existing in the liquid phase of the cyanide slag is always a key factor for restricting the deep purification treatment of the cyanide slag. At present, except the method, the reduction of the water content of the cyanogen slag is the most direct treatment mode, and the reduction of the water content of the cyanogen slag generally adopts three measures of filter pressing, natural airing or high-temperature drying by a filter press, because the ore grinding granularity of the cyaniding gold extraction process in the gold industry is finer, the oxidized ore component ratio in some ores is more, the water content of the cyanogen slag can be reduced to 15-25% by the filter pressing by the filter press, and the further reduction is very difficult; the natural airing is generally applied after the filter pressing of the cyanogen slag, but the requirement of the climate condition of the enhanced natural degradation method in the technical Specification for controlling the pollution of the cyanogen slag in the gold industry (HJ943-2018) is met, and the limitation of the area is large; the high-temperature drying can thoroughly reduce the water content of the cyanogen slag and the content of pollutants in a liquid phase, but has high energy consumption and is easy to generate secondary pollution, so that an efficient, economic and clean cyanogen slag deep purification treatment technology is not developed in the gold industry till now.
Therefore, how to recover and treat cyanide vapor generated by evaporation and organically combine the cyanide vapor with other cyanide slag treatment methods to carry out the cooperative treatment of the cyanide slag is a key problem for realizing efficient, economic and clean deep purification of the cyanide slag.
Disclosure of Invention
In order to overcome the problems, the invention provides a method for strengthening natural degradation of cyanogen slag, which utilizes the existing solar greenhouse to purify the cyanogen slag.
A method for strengthening natural degradation of cyanogen slag comprises the following steps:
step one, building a closed solar greenhouse suitable for decomposing cyanide slag
The closed solar greenhouse comprises a closed house body 1 provided with a feeding door and a discharging door, a heat supply system 3, a floor heating system 4, a ventilation system 5, a dehumidification system 6, a greenhouse cleaning system 7, a turner 8, a medicament spraying system 9 and a monitoring system 10, wherein the floor heating system 4 is laid below a floor in the closed house body 1, the heat supply system 3 is positioned outside the closed house body 1 and is communicated with the floor heating system 4 in the closed house body 1, the ventilation system 5 is fixed above the inside of the closed house body 1, one end of the ventilation system extends out of the closed house body 1 and is communicated with the dehumidification system 6 outside the closed house body 1, the other end of the ventilation system 5 extends out of the closed house body 1 and is communicated with an absorption tower 52 outside the closed house body 1, and the greenhouse cleaning system 7 is arranged on the roof of the closed house body 1; the turner 8 is arranged on the floor in the closed house body 1; the agent spraying system 9 comprises an agent preparation groove 91, an agent delivery pipe 92 and an agent spray nozzle 93, wherein the agent preparation groove 91 positioned outside the closed room body 1 is communicated with the agent spray nozzle 93 arranged in the closed room body 1 through the agent delivery pipe 92, and the agent delivery pipe 92 is provided with a pump, a flow meter and a valve; a set of monitoring system 10 is respectively arranged inside and outside the closed house body 1;
secondly, conveying the filter-pressed cyanogen slag 2 to the floor inside the closed house body 1 from a feeding door of the closed house body 1;
step three, the heating system 3, the floor heating system 4, the ventilation system 5 and the monitoring system 10 are started, the temperature in the closed room body 1 is kept above 50 ℃, and the humidity is in an unsaturated state;
step four, distributing the cyanogen slag 2 by a turner 8 to enable the cyanogen slag 2 to be paved on the floor of the closed house body 1;
step five, starting a medicament spraying system 9, uniformly spraying a medicament to the cyanogen slag 2 by a medicament spray nozzle 93, and uniformly mixing the medicament and the cyanogen slag 2 by a turner 8;
sixthly, continuously turning the cyanide slag 2 by a turning machine 8, and conveying the generated cyanide-containing steam into an absorption tower 52 by a rear end fan 54 for absorption;
step seven, repeating the operation from the step four to the step six for multiple times, taking the cyanide slag 2 for cyanide content detection, and stacking the cyanide slag 2 in a reserved cyanide slag storage area in the closed house body 1 by a turner 8 after the cyanide content of the cyanide slag 2 reaches the standard;
step eight, when dust or stains accumulated on the closed house body 1 influence sunlight permeation, the greenhouse cleaning system 7 is started to clean the roof and the periphery.
The heating system 3 comprises a solar heat collector 31, a heat collecting water tank 32 and a circulating water pipe 33, wherein one end of the circulating water pipe 33 is communicated with the heat collecting water tank 32, the other end of the circulating water pipe is communicated with a floor heating system 4 in the closed room body 1, a pump, a valve and a flowmeter are arranged on the circulating water pipe 33, and the solar heat collector 31 is connected with the heat collecting water tank 32 through a water pipe.
The ventilation system 5 comprises a front end fan 53, a rear end fan 54 and a plurality of internal fans 51, wherein the front end fan 53 and the rear end fan 54 are respectively fixed outside the closed room body 1, the front end fan 53 is communicated with the dehumidification system 6, the rear end fan 54 is communicated with an absorption tower 52 outside the closed room body 1, and the internal fans 51 are all fixed in the closed room body 1.
The greenhouse cleaning system 7 comprises a cleaning pipe 71 and a plurality of cleaning nozzles 72, wherein the cleaning pipe 71 is laid outside the roof of the closed house body 1, the cleaning nozzles 72 are fixed on the cleaning pipe 71, and each cleaning nozzle 72 is communicated with the interior of the cleaning pipe 71.
And a medicament spray head 93 of the medicament spraying system 9 is arranged on the turner 8 in the closed room body 1.
The monitoring system 10 comprises a thermometer, a hygrometer and a hydrogen cyanide gas monitor, wherein the monitoring system 10 located in the closed room body 1 is fixed above the inside of the closed room body 1, the monitoring system 10 located outside the closed room body 1 is fixed outside the closed room body 1, and namely the outer thermometer, the hygrometer and the hydrogen cyanide gas monitor are respectively fixed above the inside of the closed room body 1 and the closed room body 1.
The hydrogen cyanide gas monitor of the monitoring system 10, which is positioned outside the closed room body 1, is arranged near the absorption tower 52 and is 0.5-3 m away from the outlet of the absorption tower 52.
And step four and step five are determined to be started or not according to the treatment target requirement of the cyanide slag 2 and the volatilization difficulty of cyanide, and when the treatment requirement of the cyanide slag can be met only by drying operation, the operation from step four to step six is not carried out.
The fifth step is that the spraying agent is one of dilute sulfuric acid, dilute phosphoric acid, hydrogen peroxide, ferrous solution, copper sulfate solution, zinc sulfate solution, sodium sulfite solution and sodium metabisulfite solution, or two or more of dilute sulfuric acid, dilute phosphoric acid, hydrogen peroxide, ferrous solution, copper sulfate solution, zinc sulfate solution, sodium sulfite solution and sodium metabisulfite solution, the mass fraction of the mixed combined agents is 0.5-10%, and the mass ratio of the spraying amount to the cyanogen slag 2 is 1: 100-1: 20.
The invention has the beneficial effects that:
the invention combines the cyanide slag medicament treatment with the low-temperature drying treatment by utilizing the solar greenhouse, the sprayed medicament plays a role in removing cyanide or stabilizing heavy metals in the cyanide slag, the solar greenhouse plays a role in drying the cyanide slag at low temperature and reducing residual cyanide in a liquid phase, thereby realizing the high-efficiency, economic and clean deep purification treatment of the cyanide slag, and the sodium hydroxide absorption tower is additionally arranged at the tail end of the ventilation system for absorbing hydrogen cyanide in steam, thereby not only ensuring the safety and environmental protection of the reforming treatment system, but also recovering the hydrogen cyanide evaporated from the cyanide slag and returning the hydrogen cyanide to the production system of enterprises, saving the production cost of the enterprises, and the treated cyanide slag can be qualified to be stockpiled or further comprehensively utilized.
Drawings
Fig. 1 is a structural schematic view of a solar greenhouse of the invention.
Fig. 2 is a schematic structural view of a ventilation system of a solar greenhouse in the invention.
FIG. 3 is a schematic view of the dehumidification system of the present invention.
Fig. 4 is a schematic view of a chemical spraying system according to the present invention.
In the figure: 1-sealing the house body; 2-cyanogen slag; 3-a heating system; 31-a solar thermal collector; 32-a hot water tank; 33-a circulating water pipe; 4-a floor heating system; 5-a ventilation system; 51-a fan; 52-an absorption column; 6-a dehumidification system; 7-a greenhouse cleaning system; 71-a cleaning tube; 72-cleaning the spray head; 8-turning the throwing machine; 9-a medicament spray system; 91-a medicament preparation tank; 92-a medicament delivery tube; 93-a medicament spray head; 10-monitoring system.
Detailed Description
The principle of the method of the invention is as follows: the solar greenhouse is arranged in a heat-insulating building enclosure, the temperature in the building enclosure is raised by utilizing the solar heating plate and sunlight irradiation, and moisture in the building enclosure is exhausted by air draft, so that the air humidity in the building enclosure is always kept in an unsaturated state, the material is promoted to be continuously evaporated to the ambient air, and the purpose of reducing the water content of the material is achieved. At present, solar greenhouses are applied to the industries of sludge drying, agricultural product material drying and the like in the sewage treatment industry, a good material drying and dehydrating effect is achieved, the operation cost is low, the operation and the maintenance are convenient, and the solar greenhouses are applied to the cyanogen slag treatment in the gold industry at present, so that the efficient, economic, clean and deep purification treatment of the cyanogen slag is realized.
The improved solar greenhouse comprises a closed house body 1, a heat supply system 3, a floor heating system 4, a ventilation system 5, a dehumidification system 6, a greenhouse cleaning system 7, a turning and throwing machine 8, a medicament spraying system 9, a monitoring system 10 and a control system, wherein the closed house body 1 is formed by sealing and fixing a covering plate outside a steel framework, and the steel framework is a rectangular steel pipe, H-shaped steel and the like to form a Venlo structure or a portal rigid frame structure; the covering plate is a PC sunlight plate or toughened glass and is laid and fixed on the steel skeleton; the heating system 3 comprises a solar heat collector 31, a hot water tank 32 and a circulating water pipe 33 and provides heat for the floor heating system 4 in the solar greenhouse; the ground heating system 4 is a loop heating pipe, is laid under the floor of the closed house body 1, and provides heat through circulating hot water introduced into the loop heating pipe, and the circulating hot water is provided by the heat supply system 3; the ventilation system 5 consists of a certain number of fans and gas absorption towers which are fixed inside the closed house body 1, so that the air inside and outside the solar greenhouse is exchanged, and the temperature, the humidity and harmful gas in the greenhouse are adjusted; the dehumidification system 6 is arranged at an air inlet of the solar greenhouse, and a moisture absorption material is arranged in the dehumidification system to dehumidify the inlet air, so that moisture is prevented from being brought into the solar greenhouse in areas with high moisture or areas with high moisture in rainy days or in weather; the greenhouse cleaning system 7 consists of a cleaning pipe 71 and a cleaning nozzle 72 which are arranged around the greenhouse, and is used for cleaning the roof and the surrounding walls of the greenhouse; the turner 8 is arranged on the floor of the solar greenhouse and used for distributing, turning, mixing, back-mixing and the like; the agent spraying system 9 consists of an agent preparation groove 91, an agent conveying pipe 92 and an agent spray nozzle 93, wherein the agent spray nozzle 93 is arranged in the closed room body 1 or on the turner 8 and uniformly sprays the materials; the monitoring system 10 consists of a thermometer, a hygrometer and a harmful gas monitor which are arranged inside and outside the solar greenhouse, constantly monitors the temperature and humidity inside and outside the greenhouse and the concentration of harmful gas, and transmits the monitoring result to the control system; the control system is a central system of the solar greenhouse, the operation of the heat supply system 3, the ventilation system 5 and the turner 8 is controlled according to information fed back by the monitoring system, all the operation in the greenhouse is mechanical operation, the control system controls the operation and the stop, the operation and the maintenance are eliminated, and no people work is done.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A method for strengthening natural degradation of cyanogen slag comprises the following steps:
step one, refitting a closed solar greenhouse
As shown in figure 1, the existing closed solar greenhouse comprises a closed house body 1 provided with a feeding door and a discharging door, a heat supply system 3, a floor heating system 4, a ventilation system 5 and a dehumidification system 6, a greenhouse cleaning system 7, a turner 8, a medicament spraying system 9 and a monitoring system 10 are additionally arranged on the existing closed solar greenhouse, wherein the floor heating system 4 is laid under the floor in the closed house body 1, the heat supply system 3 is positioned outside the closed house body 1, and is communicated with a floor heating system 4 in the closed house body 1, a ventilation system 5 is fixed above the inside of the closed house body 1, one end of the ventilation system 5 extends out of the closed house body 1 and is communicated with a dehumidification system 6 positioned outside the closed house body 1, the other end of the ventilation system extends out of the closed house body 1 and is communicated with an absorption tower 52 positioned outside the closed house body 1, and a greenhouse cleaning system 7 is arranged on the roof of the closed house body 1; the turner 8 is arranged on the floor in the closed house body 1 and can move on the floor in the closed house body 1; the agent spraying system 9 comprises an agent preparation groove 91, an agent delivery pipe 92 and an agent spray nozzle 93, wherein the agent preparation groove 91 positioned outside the closed room body 1 is communicated with the agent spray nozzle 93 arranged in the closed room body 1 through the agent delivery pipe 92 arranged in the closed room body 1, and the agent delivery pipe 92 is provided with a pump, a flow meter and a valve; a set of monitoring system 10 is respectively arranged inside and outside the closed house body 1.
The monitoring system 10 comprises a thermometer, a hygrometer and a hydrogen cyanide gas monitor, wherein the monitoring system 10 located in the closed room body 1 is fixed above the inside of the closed room body 1, the monitoring system 10 located outside the closed room body 1 is fixed outside the closed room body 1, and namely the outer thermometer, the hygrometer and the hydrogen cyanide gas monitor are respectively fixed above the inside of the closed room body 1 and the closed room body 1.
The closed house body 1 comprises a steel skeleton, covering plates and a floor, wherein the covering plates are respectively fixed on the top end and the periphery of the steel skeleton in a sealing mode, the floor is fixed at the bottom of the steel skeleton in a sealing mode, the steel skeleton is of a Venlo structure or a portal rigid frame structure formed by rectangular steel pipes, H-shaped steel and the like, and the covering plates are made of PC sunlight plates or toughened glass.
The heating system 3 comprises a solar heat collector 31, a heat collecting water tank 32 and a circulating water pipe 33, wherein one end of the circulating water pipe 33 is communicated with the heat collecting water tank 32, the other end of the circulating water pipe is communicated with the floor heating system 4 in the closed room body 1, a pump, a valve and a flowmeter are arranged on the circulating water pipe 33, the solar heat collector 31 is connected with the heat collecting water tank 32 through a water pipe, and water in the heat collecting water tank 32 is heated.
The circulating water pipe 33 supplies hot water to the floor heating system 4, so that heat is provided for the floor heating system 4 in the closed house body 1. The floor heating system 4 is a loop heating pipe and is arranged below the floor of the closed house body 1.
The ventilation system 5 comprises a front end fan 53, a rear end fan 54 and a plurality of internal fans 51, wherein the front end fan 53 and the rear end fan 54 are respectively fixed on a steel skeleton outside the closed room body 1, the front end fan 53 is communicated with the dehumidification system 6, the rear end fan 54 is communicated with an absorption tower 52 outside the closed room body 1, and the internal fans 51 are all fixed on a beam of the steel skeleton inside the closed room body 1.
As shown in fig. 2, a front end fan 53 of the ventilation system 5 is communicated with the dehumidification system 6, a rear end fan 54 is communicated with the absorption tower 52, and a plurality of internal fans 51 are uniformly arranged on a steel skeleton beam in the closed room body 1, so that air inside and outside the closed room body 1 is exchanged, and temperature, humidity and harmful gas in the warm room are adjusted;
the dehumidification system 6 is arranged at an air inducing port of the closed room body 1, namely is communicated with the front end fan 53, and the dehumidification system 6 is a container internally provided with a moisture absorption material 61 and used for filtering and dehumidifying the inlet air. Like an activated carbon adsorption tank, the container is filled with the desiccant 61.
The greenhouse cleaning system 7 comprises a cleaning pipe 71 and a plurality of cleaning nozzles 72, wherein the cleaning pipe 71 is laid outside the roof of the closed house body 1, the cleaning nozzles 72 are fixed on the cleaning pipe 71, and each cleaning nozzle 72 is communicated with the interior of the cleaning pipe 71. When the roof and the surrounding walls of the greenhouse are cleaned, a water tap or a cleaning pump is connected with the cleaning pipe 71, and then the roof is cleaned by spraying water through the cleaning nozzle 72.
The turner 8 is just a common turner capable of realizing the function of turning materials, and the turner 8 spans two sides of the greenhouse, so that the operations of distributing, turning, mixing, back mixing and the like of the cyanogen slag are conveniently carried out back and forth;
as shown in fig. 3, the chemical spray head 93 of the chemical spray system 9 may be disposed on the turner 8 inside the closed housing 1.
As shown in fig. 4, the chemical spray head 93 of the chemical spray system 9 may be disposed on a cross beam of a steel skeleton inside the closed housing 1.
The agent spraying system 9 comprises an agent preparation groove 91, an agent delivery pipe 92 and agent nozzles 93, wherein the agent preparation groove 91 is connected with the agent nozzles 93 positioned in the closed house body 1 through the agent delivery pipe 92, the agent nozzles 93 are arranged on the turner 8 or on a beam of a steel skeleton, when the agent nozzles 93 are arranged on the turner 8, a plurality of agent nozzles 93 are uniformly arranged in a row on the turner 8, the agent is sprayed on the cyanogen slag 2 along the movement path of the turner 8, the agent delivery pipe 92 is a hose, as shown in fig. 4, when the agent nozzles 93 are arranged on the beam of the steel skeleton 1, the agent nozzles 93 are uniformly arranged above the cyanogen slag 2, and the agent delivery pipe 92 is a hard pipe.
The control system is respectively connected with the solar heat collector 31, the pump, the valve and the flow meter on the circulating water pipe 33, the front end fan 53, the rear end fan 54 and the internal fan 51 of the ventilation system 5, the turner 8, the pump, the flow meter and the valve arranged on the medicament conveying pipe 92 and the monitoring system 10 in a control mode through leads.
The temperature and humidity inside and outside the greenhouse and the concentration of hydrogen cyanide gas are monitored constantly, and monitoring results are transmitted to the control system 11; the control system 11 is a central system of the solar greenhouse, the operation of the heat supply system 3, the ventilation system 5 and the turner 8 is controlled according to information fed back by the monitoring system 10, all the operation in the greenhouse is mechanical operation, the control system 11 controls the operation and the stop, the shutdown maintenance is removed, and the operation of the greenhouse is unmanned.
Secondly, conveying the filter-pressed cyanogen slag 2 to the floor inside the closed house body 1 from a feed inlet of the closed house body 1 by using a belt conveyor or a transport vehicle;
step three, the control system controls the heating system 3, the floor heating system 4, the ventilation system 5 and the monitoring system 10 to be started, the temperature in the closed house body 1 is kept above 50 ℃, and the humidity is in an unsaturated state;
fourthly, the control system controls a turner 8 in the closed house body 1 to distribute the cyanogen slag 2, so that the cyanogen slag 2 is flatly paved on the floor of the closed house body 1;
step five, the control system controls to start the agent spraying system 9, the agent spray nozzle 93 uniformly sprays the agent to the cyanide slag 2, and the agent is uniformly mixed by the turner 8;
step six, continuously turning the cyanide slag by a turning machine 8, and conveying the generated cyanide-containing steam into an absorption tower 52 by a rear end fan 54 for absorption;
step seven, repeating the operation from the step four to the step six for multiple times, taking the cyanide slag 2 for cyanide content detection, and stacking the cyanide slag 2 in a reserved cyanide slag storage area in the closed house body 1 by a turner 8 after the cyanide content of the cyanide slag 2 reaches the standard; taking out the qualified cyanogen slag 2 through a discharge door of the closed house body 1 according to the requirement;
step eight, when dust or stains accumulated on the closed house body 1 influence sunlight permeation, the greenhouse cleaning system 7 is started to clean the roof and the peripheral walls of the closed house body 1.
The air volume of the internal fans 51 of the front end fan 53 and the rear end fan 54 of the ventilation system 5 is equal, 5-20% of sodium hydroxide solution is stored in the gas absorption tower 52, and the sodium cyanide solution generated by absorbing hydrogen cyanide in the absorption tower 52 returns to an enterprise production system for cyaniding and gold extraction.
The moisture absorption material 61 in the dehumidification system 6 is calcium chloride, quicklime, charcoal, silica gel, activated alumina or molecular sieve.
The hydrogen cyanide gas monitor of the monitoring system 10, which is positioned outside the closed room body 1, is arranged near the absorption tower 52 and is 0.5-3 m away from the outlet of the absorption tower 52.
The thickness of the dicyandiamide slag 2 paved on the floor of the closed house body 1 is 0.1-1 m.
And the fourth step and the fifth step are determined to be started or not according to the treatment target requirement of the cyanide slag 2 and the volatilization difficulty of cyanide, and when the treatment requirement of the cyanide slag can be met only by drying operation, the fourth step and the fifth step are not carried out.
The fifth step of spraying the agent is one of dilute sulfuric acid, dilute phosphoric acid, hydrogen peroxide, ferrous solution, copper sulfate solution, zinc sulfate solution, sodium sulfite solution and sodium metabisulfite solution, or two or more of dilute sulfuric acid, dilute phosphoric acid, hydrogen peroxide, ferrous solution, copper sulfate solution, zinc sulfate solution, sodium sulfite solution and sodium metabisulfite solution, wherein the mass fraction of the mixed combined agent is 0.5-10%, and the mass ratio of the spraying amount to the cyanogen residues 2 is 1: 100-1: 20.
The qualified treatment of the heptacyanogen slag 2 meets the requirement of tailings pond disposal or utilization limit value in the technical Specification for pollution control of cyanogen slag in the gold industry (HJ943-2018), or meets the standard requirement of other utilized raw materials.
Example 1
The mass concentration of cyanide-containing tailing slurry of a certain gold mine is 40%, the pollutant components in a liquid phase and tailings are shown in table 1, the water content of filter pressing residues is 20.5% after filter pressing by a filter press, and the toxicity leaching test result is shown in table 2. The treated cyanogen slag meets the requirement of tailings pond disposal in the technical Specification for pollution control of cyanogen slag in the gold industry (HJ943-2018), and is shown in Table 3.
TABLE 1 analysis of the pollutant composition of cyanide-containing tailing slurries
TABLE 2 Filter Press Log toxicity Leaching test results
Note: the unit of index in the table is mg/L.
TABLE 3 treatment Standard Limit for cyanogen slag tailings ponds
Note: the unit of index in the table is mg/L.
And conveying the filter-pressing residues to the solar greenhouse by using a belt conveyor, namely, on a floor in the closed house body 1, and starting the heat supply system 3, the floor heating system 4, the ventilation system 5, the dehumidification system 6, the monitoring system 10 and the control system. Distributing the cyanogen slag 2 by using a turner 8, enabling the cyanogen slag 2 to be paved on the floor of a closed house body 1, starting a medicament spraying system 9, uniformly spraying a medicament to the cyanogen slag 2 by a medicament spray nozzle 93, and uniformly mixing by using the turner 8, wherein the sprayed medicament is a dilute sulfuric acid solution with the mass concentration of 2%, and the mass ratio of the spraying amount to the cyanogen slag 2 is 1: 200. Keeping the temperature in the closed house body 1 between 70 and 80 ℃ and the humidity in an unsaturated state, continuously turning the cyanide residues by a turner 8 back and forth, conveying the generated cyanide-containing steam into an absorption tower 52 by a fan 51, taking 20 percent sodium hydroxide solution in the absorption tower, and analyzing the cyanide residues in the solar greenhouse after lasting for 5 hours, wherein the water content is 0.2 percent, and the cyanide residue toxicity leaching test result is shown in a table 4.
TABLE 4 toxicity leaching test results of cyanogen slag
Note: the unit of index in the table is mg/L.
As can be seen from Table 4, each index of the treated cyanogen slag can meet the requirement of tailings pond disposal in the technical Specification for pollution control of cyanogen slag in the gold industry (HJ 943-2018).
Example 2
The water content of tailing slag of cyanide-containing tailing pulp of a certain gold mine after harmless treatment is 21%, the toxicity leaching test result is shown in table 5, and the treated cyanide slag meets the backfill utilization requirement in the gold industry cyanide slag pollution control technical specification (HJ943-2018), which is shown in table 6.
TABLE 5 toxicity leaching test results of cyanogen slag
Note: the unit of index in the table is mg/L.
TABLE 6 standard limit for cyanide slag backfill
Note: the unit of index in the table is mg/L.
And conveying the filter-pressing residues to the solar greenhouse by using a belt conveyor, namely, on a floor in the closed house body 1, and starting the heat supply system 3, the floor heating system 4, the ventilation system 5, the dehumidification system 6, the monitoring system 10 and the control system 11. The cyanogen slag 2 is distributed by using a turner 8, the cyanogen slag 2 is flatly paved on the floor of a closed room body 1, the temperature in the closed room body 1 is kept at about 60 ℃, the humidity is in an unsaturated state, the turner 8 continuously turns and throws the cyanogen slag back and forth, the generated steam containing cyanide is conveyed into an absorption tower 52 by a fan 51, 20% of sodium hydroxide solution is contained in the absorption tower, after the continuous operation for 6 hours, the cyanogen slag in the solar greenhouse is taken for analysis, the water content is 0.1%, and the toxicity leaching test result of the cyanogen slag is shown in a table 7.
TABLE 7 toxicity leaching test results of cyanogen slag
Note: the unit of index in the table is mg/L.
As can be seen from Table 7, each index of the treated cyanogen slag can meet the backfill utilization requirement in the technical Specification for pollution control of cyanogen slag in the gold industry (HJ 943-2018).
Claims (9)
1. A method for strengthening natural degradation of cyanogen slag is characterized by comprising the following steps:
step one, building a closed solar greenhouse suitable for decomposing cyanide slag
The closed solar greenhouse comprises a closed house body 1 provided with a feeding door and a discharging door, a heat supply system 3, a floor heating system 4, a ventilation system 5, a dehumidification system 6, a greenhouse cleaning system 7, a turner 8, a medicament spraying system 9 and a monitoring system 10, wherein the floor heating system 4 is laid below a floor in the closed house body 1, the heat supply system 3 is positioned outside the closed house body 1 and is communicated with the floor heating system 4 in the closed house body 1, the ventilation system 5 is fixed above the inside of the closed house body 1, one end of the ventilation system extends out of the closed house body 1 and is communicated with the dehumidification system 6 outside the closed house body 1, the other end of the ventilation system 5 extends out of the closed house body 1 and is communicated with an absorption tower 52 outside the closed house body 1, and the greenhouse cleaning system 7 is arranged on the roof of the closed house body 1; the turner 8 is arranged on the floor in the closed house body 1; the agent spraying system 9 comprises an agent preparation groove 91, an agent delivery pipe 92 and an agent spray nozzle 93, wherein the agent preparation groove 91 positioned outside the closed room body 1 is communicated with the agent spray nozzle 93 arranged in the closed room body 1 through the agent delivery pipe 92, and the agent delivery pipe 92 is provided with a pump, a flow meter and a valve; a set of monitoring system 10 is respectively arranged inside and outside the closed house body 1;
secondly, conveying the filter-pressed cyanogen slag 2 to the floor inside the closed house body 1 from a feeding door of the closed house body 1;
step three, the heating system 3, the floor heating system 4, the ventilation system 5 and the monitoring system 10 are started, the temperature in the closed room body 1 is kept above 50 ℃, and the humidity is in an unsaturated state;
step four, distributing the cyanogen slag 2 by a turner 8 to enable the cyanogen slag 2 to be paved on the floor of the closed house body 1;
step five, starting a medicament spraying system 9, uniformly spraying a medicament to the cyanogen slag 2 by a medicament spray nozzle 93, and uniformly mixing the medicament and the cyanogen slag 2 by a turner 8;
sixthly, continuously turning the cyanide slag 2 by a turning machine 8, and conveying the generated cyanide-containing steam into an absorption tower 52 by a rear end fan 54 for absorption;
step seven, repeating the operation from the step four to the step six for multiple times, taking the cyanide slag 2 for cyanide content detection, and stacking the cyanide slag 2 in a reserved cyanide slag storage area in the closed house body 1 by a turner 8 after the cyanide content of the cyanide slag 2 reaches the standard;
step eight, when dust or stains accumulated on the closed house body 1 influence sunlight permeation, the greenhouse cleaning system 7 is started to clean the roof and the periphery of the closed house body 1.
2. The method for enhancing the natural degradation of the cyanogen slag according to claim 1, wherein the heating system 3 comprises a solar heat collector 31, a heat collecting water tank 32 and a circulating water pipe 33, wherein one end of the circulating water pipe 33 is communicated with the heat collecting water tank 32, the other end of the circulating water pipe 33 is communicated with the floor heating system 4 in the closed room body 1, the circulating water pipe 33 is provided with a pump, a valve and a flowmeter, and the solar heat collector 31 is connected with the heat collecting water tank 32 through a water pipe.
3. The method for enhancing natural degradation of cyanogen slag according to claim 2, wherein said ventilation system 5 comprises a front fan 53, a rear fan 54, a plurality of internal fans 51 and an absorption tower 52, wherein said front fan 53 and said rear fan 54 are respectively fixed outside said closed house 1, said front fan 53 is connected to said dehumidification system 6, said rear fan 54 is connected to said absorption tower 52 outside said closed house, and said plurality of internal fans 51 are fixed inside said closed house 1.
4. The method for strengthening natural degradation of cyanogen slag according to claim 3, wherein said greenhouse cleaning system 7 comprises a cleaning pipe 71 and a plurality of cleaning nozzles 72, wherein said cleaning pipe 71 is laid on the outside of the roof of said closed house body 1, said plurality of cleaning nozzles 72 are fixed on said cleaning pipe 71, and each cleaning nozzle 72 is connected to the inside of said cleaning pipe 71.
5. The method for enhancing the natural degradation of the cyanogen slag according to claim 4, wherein the agent nozzle 93 of the agent spraying system 9 is arranged on the turner 8 in the closed house body 1.
6. The method for enhancing natural degradation of cyanogen slag according to claim 5, wherein said monitoring system 10 comprises a thermometer, a hygrometer and a hydrogen cyanide gas monitor, wherein the monitoring system 10 located inside the closed housing 1 is fixed above the inside of the closed housing 1, the monitoring system 10 located outside the closed housing 1 is fixed outside the closed housing 1, i.e. the external thermometer, the hygrometer and the hydrogen cyanide gas monitor are respectively fixed above the inside of the closed housing 1 and the closed housing 1.
7. The method for enhancing natural degradation of cyanogen slag according to claim 6, wherein the hydrogen cyanide gas monitor of the monitoring system 10 located outside the closed housing 1 is disposed near the absorption tower 52 and is located between 0.5 m and 3m from the outlet of the absorption tower 52.
8. The method for enhancing natural degradation of cyanogen slag according to claim 7, wherein the fourth step and the fifth step are determined to be opened or not according to the treatment target requirement of cyanogen slag 2 and the volatilization difficulty of cyanide, and when the treatment requirement of cyanogen slag can be met only by drying, the fourth step to the sixth step are not performed.
9. The method for enhancing natural degradation of cyanogen slag according to claim 8, wherein the agent sprayed in step five is one of dilute sulfuric acid, dilute phosphoric acid, hydrogen peroxide, ferrous solution, copper sulfate solution, zinc sulfate solution, sodium sulfite solution and sodium metabisulfite solution, or a combination agent of two or more of dilute sulfuric acid, dilute phosphoric acid, hydrogen peroxide, ferrous solution, copper sulfate solution, zinc sulfate solution, sodium sulfite solution and sodium metabisulfite solution, the mass fraction of the mixed combination agent is 0.5-10%, and the spraying amount and the cyanogen slag 2 mass ratio are 1: 100-1: 20.
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| CN113526721A (en) * | 2021-06-28 | 2021-10-22 | 张池 | Decyanation process of cyanided tailings |
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Application publication date: 20201013 |