CN106977015A - A kind of sulphur-bearing ore Cyanided gold tailings slurry harmless treatment and tail washings purification method - Google Patents
A kind of sulphur-bearing ore Cyanided gold tailings slurry harmless treatment and tail washings purification method Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/18—Cyanides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Abstract
The present invention relates to a kind of slurry harmless treatment of sulphur-bearing ore Cyanided gold tailings and tail washings purification method, belong to environmental technology field.Including molysite drop cyanogen, zinc salt drop cyanogen, filtering, tail washings purification, neutralization and tail gas absorption.Using molysite is dropped into cyanogen method and zinc salt drop cyanogen method harmless treatment is carried out with reference to Cyanided gold tailings slurry, tailings after its press filtration is set to reach general industrial solid waste requirement, press filtration tail washings is purified by tail washings cleaning system again, return it to cyanidation technology not have a negative impact to Cyanide Leaching, while by SCN‑It is regenerated as CN‑So as to reclaim CN‑, its conversion ratio reached more than 98%.The inventive method is novel, easily realizes, provides powerful technique guarantee for gold mine sustainable health development, can be widely applied in engineering practice.
Description
Technical field
The invention belongs to environmental technology field, in particular for the cyanidation gold-extracted rear Tailings Slurry harmless treatment of sulphur-bearing ore and
Tail washings purification method.
Background technology
It is high, low to ore strong adaptability, cost, just by its rate of recovery since being applied to carry gold from cyaniding in 1887
Ground pan and be widely used in gold industry.Its principle is that cyanide can make Gold in Ores with Gold in Ores formation complex compound
Silver is dissolved in liquid phase, but while dissolving gold, also there occurs side reaction, and such as cyanide forms heavy metal with other heavy metals
Complex compound and sulphur component formation rhodanide etc..Gold wraps up golden form with sulphur and existed in most sulphur-bearing ores, cyanide gold-leaching mistake
Journey first has to add excessive Cymag and wrap up sulphur gold to break, could be by Gold leaching, while producing substantial amounts of accessory substance sulphur cyanogen
Hydrochlorate.At present, gold industry cyanide barren solution is recycled, and long-term circulation causes the ion accumulation for being unfavorable for leaching, and influences cyaniding
Leaching effect, most enterprises take the modes for adding Cymag to reduce adverse effect more, but with Cymag dosage
It is continuously increased, the ion accumulation for playing negative interaction to Cyanide Leaching is more serious, and Cyanide Leaching effect is gradually deteriorated.
Research at present both at home and abroad to sludge containing cyanogenses harmless treatment is more, and processing method is substantially destruction cyanide,
Method has alkaline chlorination process, Yin Kefa, hydrogen peroxide oxidation method etc..Alkaline chlorination process is also the method applied at home earliest, should
Method also has application in cyaniding tailing slurry process field, and it is that chlorine system oxidant is quantitatively put into cyaniding tailing slurry except cyanogen process
In, pH is between 10-11 for control reaction, and quickly, product is cyanate to reaction speed, and cyanate is converted into carbon under certain condition
Hydrochlorate and ammonia.Alkaline chlorination process can not destroy ferrous cyano complex and iron cyano complex, can not form it into sediment and go
Remove, while excessive hypochlorite returns to cyaniding and leaching process, chlorion in the cyanide that destruction is added, system will be continued and accumulated
By etching apparatus.Yin Kefa is to form oxidation system oxidation easily release cyanide using the medicament containing sulfur dioxide and oxygen,
Ferrous cyano complex and iron cyano complex obtain part removal with precipitation form simultaneously, and treatment effect is relatively stablized, but need to add
A certain amount of mantoquita is as catalyst, while have certain limitation requirement to pH, and cyanogen in the Tailings Slurry of some gold mining enterprises
Compound composition is complicated cyanide complex, and Yin Kefa can not be removed it.Cyaniding tailing slurry is handled using Yin Kefa at present
Company have Guizhou Jin Feng mining industry Co., Ltd, Liaoning Baiyun gold mine etc..
Hydrogen peroxide oxidation method is to utilize hydrogen peroxide Strong oxdiative characteristic oxidation easily release cyanide, control condition and Yin Kefa phases
Seemingly, oxidation rate is fast compared with Yin Kefa, but poor to ferrous cyano complex and iron cyano complex treatment effect.
At present, the cyanidation gold-extracted tail washings purification method of gold industry applies less, and Shandong Gold is smelted Co., Ltd's high-copper and contained
The processing of cyanogen lean solution uses acidifying blow-off method, and a part of cyanide is overflowed with HCN, into absorption system recycling, one
Part forms sediment, such as cuprous cyanide, copper ferrocyanide, ferric ferrocyanide and ferroferricyanide cyaniding in acid condition
Thing sediment, filtering is removed, and rhodanate can be precipitated with cuprous production cuprous rhodanide in acid condition, but general lean solution
Middle SCN-Higher, cuprous ion is limited, SCN-Cannot effectively it remove.
The content of the invention
The present invention provides a kind of sulphur-bearing ore Cyanided gold tailings slurry harmless treatment and tail washings purification method, to solve mesh
Preceding gold industry sulphur-bearing ore Cyanided gold tailings handle problem, and circulation is unfavorable to Cyanide Leaching effect for a long time for solution lean solution
Problem.
The present invention is adopted the technical scheme that, is comprised the following steps：
Step 1：Cyanogen drops in molysite
Molysite, ferrous salt or both are added in reactor using dry powder or wet type dosing method, a part with
Free cyanide formation iron cyanogen complex ion or ferrous cyanogen complex ion in Tailings Slurry, a part with it is existing in Tailings Slurry and
Newly-generated iron cyanogen complex ion and ferrous cyanogen complex ion formation precipitation enter solid phase, so that cyanide contains in Tailings Slurry liquid phase
Amount is reduced, and molysite drop cyanogen condition is：Reaction time is 10~30 minutes, and adding molysite makes pH 8.5~9.0；
Step 2：Cyanogen drops in zinc salt
Zinc salt is added in reactor using dry powder or wet type dosing method, with the ferrous cyanogen complex ion not removed
Zinc ferrocyanide precipitation is formed, ferrous cyanogen is further removed, zinc salt drop cyanogen condition is：In 10~30 minutes reaction time, add zinc
Salt makes untill Fe ion concentrations are in below 0.2mg/L in Tailings Slurry liquid phase；
Step 3：Filtering
Sludge containing cyanogenses carry out separation of solid and liquid after molysite, zinc salt drop cyanogen processing, then through filtration system, and filtration system is used
Plate and frame filter press or ceramic filter, obtain tailings and tail washings；
Step 4：Tail washings is purified
Tail washings pH value is adjusted to acidity, pH4~6, by O with the concentrated sulfuric acid3With SCN-Mass ratio is 1:1 adds ozone, SCN quilts
Ozone decomposed produces HCN simultaneously, and copper cyanogen complex ion is also decomposed, and under acid condition oxidation environment, copper exists with cupric,
CN-It is released, a small amount of HCN is taken out of by gas enters tail gas absorbing system；
Step 5：Tail washings acid-base neutralization
Acid-base neutralization is carried out to tail washings using alkali lye, and makes pH value 7~12；
Step 6：Tail gas absorption
Tail gas is absorbed using 10%-20% sodium hydroxide solutions, makes tail gas qualified discharge.
In step 2 zinc salt drop cyanogen of the present invention, using the soluble medicament containing zinc ion.
In step 2 zinc salt drop cyanogen of the present invention, the soluble medicament containing zinc ion uses zinc sulfate or zinc nitrate.
Step of the present invention：Tail washings acid-base neutralization, using sodium hydroxide, lime or carbide slag.
It is an advantage of the invention that solving current gold industry sulphur-bearing ore Cyanided gold tailings processing problem, reduce again
Lean solution circulates the adverse effect to Cyanide Leaching effect for a long time, while can also be by SCN-It is regenerated as CN-, return to cyaniding workshop section and carry out
It is cyanidation gold-extracted, cyanidation-leaching process Cymag dosage is reduced, is achieved many things at one stroke, the method novelty of use, easily realization, treatment effeciency
Height, can be widely applied in engineering practice.
Embodiment
Embodiment 1
Comprise the following steps：
Step 1：Cyanogen drops in molysite
Molysite, ferrous salt or both are added in reactor using dry powder or wet type dosing method, a part with
Free cyanide formation iron cyanogen complex ion or ferrous cyanogen complex ion in Tailings Slurry, a part with it is existing in Tailings Slurry and
Newly-generated iron cyanogen complex ion and ferrous cyanogen complex ion formation precipitation enter solid phase, so that cyanide contains in Tailings Slurry liquid phase
Amount is reduced, and molysite drop cyanogen condition is：Reaction time is 10 minutes, and adding molysite makes pH 8.5；
Its reaction principle is as follows：
Molysite generates ferric hydroxide precipitate with alkali metal cyanide solution.
Fe3++3CN-+3H2O=Fe (OH)3↓+3HCN
This precipitation and excessive alkali metal cyanide formation iron cyano complex.
Fe(OH)3+6CN-=Fe (CN)6 3-+3OH-
Fe2++6CN-=Fe (CN)6 4-
3Fe(CN)6 4-+4Fe3-=Fe4[Fe(CN)6]3↓
2Fe(CN)6 3-+3Fe2+=Fe3〔Fe(CN)6〕2↓
Step 2：Cyanogen drops in zinc salt
Zinc salt is added in reactor using dry powder or wet type dosing method, medicament is that zinc sulfate, zinc nitrate etc. contain
The soluble medicament of zinc ion, the ferrous cyanogen complex ion formation zinc ferrocyanide precipitation with not removing, is further removed ferrous
Cyanogen, zinc salt drops cyanogen condition and is：10 minutes reaction time, add zinc salt make in Tailings Slurry liquid phase Fe ion concentrations 0.2mg/L with
Untill when lower, without controlling pH；
Its reaction principle is as follows：
2Zn2++Fe(CN)6 4-=Zn2Fe(CN)6↓
Step 3：Filtering
Sludge containing cyanogenses carry out separation of solid and liquid after molysite, zinc salt drop cyanogen processing, then through filtration system, and filtration system is used
Plate and frame filter press or ceramic filter, obtain tailings and tail washings, and tailings reaches general industrial solid waste through toxicity characteristic leaching procedure
Hardly iron content cyanogen complex ion and ferrous cyanogen complex ion in standard, tail washings, for from filtrate regeneration of cyanide provided
Power condition；
Step 4：Tail washings is purified
Tail washings circulation for a long time must cause SCN, iron cyanogen complex ion, ferrous cyanogen complex ion and copper cyanogen complex ion gradually
Accumulation, influences Cyanide Leaching effect.Iron cyanogen complex ion and ferrous cyanogen complex ion are obtained in the Tailings Slurry harmless treatment stage
To effective removal, but SCN and copper cyanogen complex ion are not removed yet in tail washings；
Tail washings pH value is adjusted to acidity, pH4, by O with the concentrated sulfuric acid3With SCN-Mass ratio is 1:1 adds ozone, and SCN is by ozone
Decompose and produce HCN simultaneously, copper cyanogen complex ion is also decomposed, and under acid condition oxidation environment, copper exists with cupric, CN-Quilt
Ozone oxidation sulphur cyanogen under release, acid condition, H is also produced while generation HCN+, as reaction is constantly carried out, pH constantly drops
It is low, because SCN contents are higher in general tail washings, so reaction can produce substantial amounts of acid completely, it need not can be thrown during continuous operation
Enriching sulfuric acid can maintenance reaction carry out, while decreasing neutralization added amount of chemical, most of cyanide is retained in filtrate,
A small amount of HCN is taken out of by gas enters tail gas absorbing system, regenerates CN-Conversion ratio has reached more than 98%；
Utilize ozone oxidation SCN-Generate CN-Reaction principle is as follows：
SCN-+O3+H2O=SO4 2-+HCN+H+
Step 5：Tail washings acid-base neutralization
Acid-base neutralization is carried out to tail washings using alkali lye, and makes pH value 7, such as sodium hydroxide, lime or carbide slag；
Step 6：Tail gas absorption
Tail gas is absorbed using 10% sodium hydroxide solution, makes tail gas qualified discharge.
Embodiment 2
Comprise the following steps：
Step 1：Cyanogen drops in molysite
Molysite, ferrous salt or both are added in reactor using dry powder or wet type dosing method, a part with
Free cyanide formation iron cyanogen complex ion or ferrous cyanogen complex ion in Tailings Slurry, a part with it is existing in Tailings Slurry and
Newly-generated iron cyanogen complex ion and ferrous cyanogen complex ion formation precipitation enter solid phase, so that cyanide contains in Tailings Slurry liquid phase
Amount is reduced, and molysite drop cyanogen condition is：Reaction time is 20 minutes, and adding molysite makes pH 8.8；
Step 2：Cyanogen drops in zinc salt
Zinc salt is added in reactor using dry powder or wet type dosing method, medicament is that zinc sulfate, zinc nitrate etc. contain
The soluble medicament of zinc ion, the ferrous cyanogen complex ion formation zinc ferrocyanide precipitation with not removing, is further removed ferrous
Cyanogen, zinc salt drops cyanogen condition and is：20 minutes reaction time, add zinc salt make in Tailings Slurry liquid phase Fe ion concentrations 0.2mg/L with
Untill when lower, without controlling pH；
Step 3：Filtering
Sludge containing cyanogenses carry out separation of solid and liquid after molysite, zinc salt drop cyanogen processing, then through filtration system, and filtration system is used
Plate and frame filter press or ceramic filter, obtain tailings and tail washings, and tailings reaches general industrial solid waste through toxicity characteristic leaching procedure
Hardly iron content cyanogen complex ion and ferrous cyanogen complex ion in standard, tail washings, for from filtrate regeneration of cyanide provided
Power condition；
Step 4：Tail washings is purified
Tail washings pH value is adjusted to acidity, pH4~6, by O with the concentrated sulfuric acid3With SCN-Mass ratio is 1:1 adds ozone, SCN quilts
Ozone decomposed produces HCN simultaneously, and copper cyanogen complex ion is also decomposed, and under acid condition oxidation environment, copper exists with cupric,
CN-It is released, a small amount of HCN is taken out of by gas enters tail gas absorbing system, regenerates CN-Conversion ratio has reached more than 98%；
Step 5：Tail washings acid-base neutralization
Acid-base neutralization is carried out to tail washings using alkali lye, and makes pH value 10, such as sodium hydroxide, lime or carbide slag；
Step 6：Tail gas absorption
Tail gas is absorbed using 15% sodium hydroxide solution, makes tail gas qualified discharge.
Embodiment 3
Comprise the following steps：
Step 1：Cyanogen drops in molysite
Molysite, ferrous salt or both are added in reactor using dry powder or wet type dosing method, a part with
Free cyanide formation iron cyanogen complex ion or ferrous cyanogen complex ion in Tailings Slurry, a part with it is existing in Tailings Slurry and
Newly-generated iron cyanogen complex ion and ferrous cyanogen complex ion formation precipitation enter solid phase, so that cyanide contains in Tailings Slurry liquid phase
Amount is reduced, and molysite drop cyanogen condition is：Reaction time is 30 minutes, and adding molysite makes pH 9.0；
Step 2：Cyanogen drops in zinc salt
Zinc salt is added in reactor using dry powder or wet type dosing method, medicament is that zinc sulfate, zinc nitrate etc. contain
The soluble medicament of zinc ion, the ferrous cyanogen complex ion formation zinc ferrocyanide precipitation with not removing, is further removed ferrous
Cyanogen, zinc salt drops cyanogen condition and is：30 minutes reaction time, add zinc salt make in Tailings Slurry liquid phase Fe ion concentrations 0.2mg/L with
Untill when lower, without controlling pH；
Step 3：Filtering
Sludge containing cyanogenses carry out separation of solid and liquid after molysite, zinc salt drop cyanogen processing, then through filtration system, and filtration system is used
Plate and frame filter press or ceramic filter, obtain tailings and tail washings, and tailings reaches general industrial solid waste through toxicity characteristic leaching procedure
Hardly iron content cyanogen complex ion and ferrous cyanogen complex ion in standard, tail washings, for from filtrate regeneration of cyanide provided
Power condition；
Step 4：Tail washings is purified
Tail washings pH value is adjusted to acidity, pH4~6, by O with the concentrated sulfuric acid3With SCN-Mass ratio is 1:1 adds ozone, SCN quilts
Ozone decomposed produces HCN simultaneously, and copper cyanogen complex ion is also decomposed, and under acid condition oxidation environment, copper exists with cupric,
CN-It is released, a small amount of HCN is taken out of by gas enters tail gas absorbing system, regenerates CN-Conversion ratio has reached more than 98%；
Step 5：Tail washings acid-base neutralization
Acid-base neutralization is carried out to tail washings using alkali lye, and makes pH value 12, such as sodium hydroxide, lime or carbide slag；
Step 6：Tail gas absorption
Tail gas is absorbed using 20% sodium hydroxide solution, makes tail gas qualified discharge.
The method and effect of the present invention is further illustrated below by way of experiment embodiment.
Deal with objects as the Tailings Slurry after gold mine Cyanide Leaching, be pumped into molysite drop cyanogen pre-reactor, while plus
Enter molysite, high-speed stirred dissolves it, gravity flow flows into molysite drop cyanogen reactor, makes in the middle of ferroferrocyanide, iron iron oxide etc.
Product is stabilized, and forms stable ferric ferrocyanide, ferroferricyanide precipitation；Ore pulp flows into zinc salt drop using discrepancy in elevation gravity flow
Cyanogen reactor, zinc salt is added in conduit positions, and medicament is mixed evenly, is reacted more abundant, is utilized molysite and the innoxious place of zinc salt
Tailings Slurry after reason carries out separation of solid and liquid by filter plants such as plate compression, ceramic filters；Tailings can reach general industry and consolidate
Body waste standard, is transported to Tailings Dam and stores up or sell outside comprehensive utilization；Tail washings enters buffer pool, utilizes the power facilities such as pipeline pump
Closed tail washings purification reactor is pumped into, certain concentrated sulfuric acid is added during start, its pH is adjusted to 4-6, is passed through ozone, with
Reaction carries out the substantial amounts of H of production+, the tail washings continuously entered neutralized with reacted solution, its pH is maintained 4-6 most
It is good；Tail gas is led into tail gas absorber using blower fan, absorbed using sodium hydroxide solution spray mode；Tail washings enters after purification
Enter closed neutralization tank diameter, tail washings can be neutralized using sodium hydroxide, lime or carbide slag.
Test specimen is the cyanidation gold-extracted rear Tailings Slurry of certain gold mining enterprises, and its liquid phase specific targets is as shown in table 1.
The Tailings Slurry liquid phase index (unit mg/L) of table 1
Note：PH is characteristic
A certain amount of Tailings Slurry is taken to be tested, ferrous sulfate added amount of chemical is 3.5g/L ore pulps, stirs 30min, sulfuric acid
Zinc added amount of chemical is 2g/L ore pulps, stirs 30min, and press filtration Tailings Slurry, tailings carries out toxicity characteristic leaching procedure, the results are shown in Table 2, this
When tail washings in indices be shown in Table 3.A certain amount of tail washings is taken, concentrated sulfuric acid dosage is 0.3mL/L, and pH is transferred to 4.0, with ozone
Constantly add, solution ph is constantly reduced, SCN contents are constantly reduced, CN-Content is constantly raised, and regenerating transformed rate is up to
98.84%, specific targets are shown in Table 4.
Tailings toxicity after table 2 is innoxious leaches result (unit mg/L)
The innoxious rear filtrate result (unit mg/L) of table 3
The tail washings cleaning test result of table 4
Note：" -- representative is not detected "；PH is characteristic.
Claims (4)
1. a kind of sulphur-bearing ore Cyanided gold tailings slurry harmless treatment and tail washings purification method, it is characterised in that including following
Step：
Step 1：Cyanogen drops in molysite
Molysite, ferrous salt or both are added in reactor using dry powder or wet type dosing method, a part and mine tailing
Free cyanide formation iron cyanogen complex ion or ferrous cyanogen complex ion in slurry, a part and existing and new life in Tailings Slurry
Into iron cyanogen complex ion and ferrous cyanogen complex ion formation precipitation enter solid phase so that cyanide content subtracts in Tailings Slurry liquid phase
Few, molysite drop cyanogen condition is：Reaction time is 10~30 minutes, and adding molysite makes pH 8.5~9.0；
Step 2：Cyanogen drops in zinc salt
Zinc salt is added in reactor using dry powder or wet type dosing method, formed with the ferrous cyanogen complex ion that does not remove
Zinc ferrocyanide is precipitated, and further removes ferrous cyanogen, and zinc salt drop cyanogen condition is：In 10~30 minutes reaction time, adding zinc salt makes
Untill Fe ion concentrations are in below 0.2mg/L in Tailings Slurry liquid phase；
Step 3：Filtering
Sludge containing cyanogenses carry out separation of solid and liquid after molysite, zinc salt drop cyanogen processing, then through filtration system, and filtration system uses sheet frame
Filter press or ceramic filter, obtain tailings and tail washings；
Step 4：Tail washings is purified
Tail washings pH value is adjusted to acidity, pH4~6, by O with the concentrated sulfuric acid3With SCN-Mass ratio is 1:1 adds ozone, and SCN is by ozone
Decompose and produce HCN simultaneously, copper cyanogen complex ion is also decomposed, and under acid condition oxidation environment, copper exists with cupric, CN-Quilt
Release, a small amount of HCN is taken out of by gas enters tail gas absorbing system；
Step 5：Tail washings acid-base neutralization
Acid-base neutralization is carried out to tail washings using alkali lye, and makes pH value 7~12；
Step 6：Tail gas absorption
Tail gas is absorbed using 10%-20% sodium hydroxide solutions, makes tail gas qualified discharge.
2. a kind of sulphur-bearing ore Cyanided gold tailings slurry harmless treatment according to claim 1 and tail washings purification method,
Characterized in that, in the step 2 zinc salt drop cyanogen, using the soluble medicament containing zinc ion.
3. a kind of sulphur-bearing ore Cyanided gold tailings slurry harmless treatment according to claim 2 and tail washings purification method,
Characterized in that, in the step 2 zinc salt drop cyanogen, the soluble medicament containing zinc ion uses zinc sulfate or zinc nitrate.
4. a kind of sulphur-bearing ore Cyanided gold tailings slurry harmless treatment according to claim 1 and tail washings purification method,
Characterized in that, the step 5 tail washings acid-base neutralization, using sodium hydroxide, lime or carbide slag.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108373217A (en) * | 2018-03-09 | 2018-08-07 | 长春黄金研究院有限公司 | A kind of method of gold industry extraction of gold process hot-pressure oxidation liquid processing cyaniding tailing slurry |
| CN108862714A (en) * | 2018-07-04 | 2018-11-23 | 中国矿业大学 | A kind of chemical precipitation-gas floatation process removes cyanogen and Treatment of cyanogen-contained wastewater |
| CN109019988A (en) * | 2018-09-20 | 2018-12-18 | 陕西太白黄金矿业有限责任公司 | A kind of cyaniding tailing slurry drop cyanogen processing system and drop cyanogen method |
| CN109385538A (en) * | 2018-11-12 | 2019-02-26 | 刘西分 | A kind of method that cyanide barren solution environment-friendly type processing cycle utilizes |
| CN109399771A (en) * | 2018-07-26 | 2019-03-01 | 内蒙古太平矿业有限公司 | A kind of method for innocent treatment of the waste water of dump leaching containing cyanogen |
| CN109502811A (en) * | 2018-12-06 | 2019-03-22 | 山东黄金矿业科技有限公司选冶实验室分公司 | The flocculation sedimentation purification method of Thiocyanate ion in a kind of cyanide wastewater |
| CN111101000A (en) * | 2019-12-27 | 2020-05-05 | 山东中城宏业矿业技术有限公司 | Device and method for removing zinc and iron in gold leaching barren solution of gold ore |
| CN112863613A (en) * | 2021-01-25 | 2021-05-28 | 山东黄金矿业科技有限公司选冶实验室分公司 | Method for determining extreme value of dosage of copper salt for treating cyanide-containing wastewater by copper salt precipitation method |
| CN113105067A (en) * | 2021-03-22 | 2021-07-13 | 内蒙古金中矿业有限公司 | Method for removing cyanogen and recovering copper by mixing bacterial liquid and copper-containing cyanogen-containing wastewater |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108373217A (en) * | 2018-03-09 | 2018-08-07 | 长春黄金研究院有限公司 | A kind of method of gold industry extraction of gold process hot-pressure oxidation liquid processing cyaniding tailing slurry |
| CN108862714A (en) * | 2018-07-04 | 2018-11-23 | 中国矿业大学 | A kind of chemical precipitation-gas floatation process removes cyanogen and Treatment of cyanogen-contained wastewater |
| CN109399771A (en) * | 2018-07-26 | 2019-03-01 | 内蒙古太平矿业有限公司 | A kind of method for innocent treatment of the waste water of dump leaching containing cyanogen |
| CN109019988A (en) * | 2018-09-20 | 2018-12-18 | 陕西太白黄金矿业有限责任公司 | A kind of cyaniding tailing slurry drop cyanogen processing system and drop cyanogen method |
| CN109385538A (en) * | 2018-11-12 | 2019-02-26 | 刘西分 | A kind of method that cyanide barren solution environment-friendly type processing cycle utilizes |
| CN109385538B (en) * | 2018-11-12 | 2020-10-30 | 刘西分 | Environment-friendly treatment and recycling method for cyanide barren solution |
| CN109502811A (en) * | 2018-12-06 | 2019-03-22 | 山东黄金矿业科技有限公司选冶实验室分公司 | The flocculation sedimentation purification method of Thiocyanate ion in a kind of cyanide wastewater |
| CN111101000A (en) * | 2019-12-27 | 2020-05-05 | 山东中城宏业矿业技术有限公司 | Device and method for removing zinc and iron in gold leaching barren solution of gold ore |
| CN112863613A (en) * | 2021-01-25 | 2021-05-28 | 山东黄金矿业科技有限公司选冶实验室分公司 | Method for determining extreme value of dosage of copper salt for treating cyanide-containing wastewater by copper salt precipitation method |
| CN113105067A (en) * | 2021-03-22 | 2021-07-13 | 内蒙古金中矿业有限公司 | Method for removing cyanogen and recovering copper by mixing bacterial liquid and copper-containing cyanogen-containing wastewater |
| CN113105067B (en) * | 2021-03-22 | 2022-10-18 | 内蒙古金中矿业有限公司 | Method for removing cyanogen and recovering copper by mixing bacterial liquid and copper-containing cyanide-containing wastewater |
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