CN110482766A - A method of separating micro heavy from iron content acid solution - Google Patents
A method of separating micro heavy from iron content acid solution Download PDFInfo
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- CN110482766A CN110482766A CN201910761577.7A CN201910761577A CN110482766A CN 110482766 A CN110482766 A CN 110482766A CN 201910761577 A CN201910761577 A CN 201910761577A CN 110482766 A CN110482766 A CN 110482766A
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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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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B11/00—Making pig-iron other than in blast furnaces
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
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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
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
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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
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/203—Iron or iron compound
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The method that the invention discloses a kind of to separate micro heavy from iron content acid solution, change the method that micro heavy is separated in traditional iron acid solution, refine by what iron acid solution was gradually classified step by step, using heating, add oxidant, solid slag is centrifuged and is dried to obtain the program of solid, it is spare that supernatant liquor recycling will be poured out again, heat treatment concentration is carried out to clear liquid to refine again, adequately effectively utilize iron content acid solution, prevent to refine not clean phenomenon, again by obtained solid and sediment, iron is smelted into through hot blown iron furnace, hot-blast stove dries effect and is conducive to iron molding well, time and additive component ratio in each group of step of stringent control, it is purer to the iron content of micro heavy separation and refinement in iron acid solution, it is high-efficient, it and is ingot iron by obtained ferro element melting, just It is used in storage storage and post-production at other products.
Description
Technical field
The invention belongs to separate micro heavy technical field in iron acid solution, more specifically, more particularly to it is a kind of
The method of micro heavy is separated from iron content acid solution.
Background technique
Contain a large amount of heavy metal ion in iron acid solution, refers to that heavy metal loses the ionic condition electronically formed.Weight
Metal ion is generated in industrial processes, if not being discharged into nature by processing will result in
Heavy metal pollution, therefore, the removal of heavy metal ions in industrial wastewater are also an important link.Heavy metal refers to that specific gravity is greater than
5 metal (referring generally to density greater than 4.5 grams of metals per cubic centimeter).Heavy metal refers to the metal that atomic weight is greater than 55.
If the atomic weight of iron is 56, it is greater than 55, therefore is also heavy metal.
Heavy metal wastewater thereby should generate place treatment in situ, cannot mix with other waste water, if with contain heavy metal from
The waste water of son is expelled directly out and soil can be made to be contaminated, while the further polluted-water of meeting, causes to seriously endanger to human body.It is existing
It is single to the method for removal of heavy metal ions in iron acid solution, can not be independent to the ferro element in the heavy metal ion of removal
Extraction is made full use of, for this purpose, we release a kind of method for separating micro heavy from iron content acid solution.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and propose a kind of from iron content acid solution
The method of middle separation micro heavy.
To achieve the above object, the invention provides the following technical scheme: it is provided by the invention a kind of from iron content acid solution
The method of middle separation micro heavy, specifically includes following production stage:
S1: by iron content acid solution into heating tank, to solution, totally concentration falls 30%；
S2: into step S1, gains add oxidant, and are stirred, and stand；
S3: pouring out supernatant liquor for gains in step 2, obtained solid slag is centrifuged, dry collect it is spare, then will be upper
Layer clear liquid recycling is spare；
S4: heating 50~180 DEG C for gained supernatant liquor in step S3 and carry out heat treatment concentration, natural after the completion of heat treatment
It is cooled to room temperature, stands；
S5: oxidant stirring will be added in the supernatant liquor stood in step S4, stands；
S6: pouring out supernatant liquor for the gains stood in step S5, obtain sediment, by gained sediment pass through from
The heart, drying are collected spare；
S7: by obtained solid in step S3, S6 and sediment, iron is smelted into through hot blown iron furnace；
A, it is stirred evenly using electrode paste, quartz sand, clay and makees furnace lining, three's weight ratio is 3: 2: 1；
B, it is ignited with wood shavings 3-5g, dry firewood 10-15kg, uses coke 20-30kg that furnace bottom is added as stock column, by hot wind
Furnace is dried, until furnace lining is aglow；
C, at supplement addition coke to the above 600mm-700mm of iron-smelting furnace ventilation opening；
D, melting: by solid and sediment, repeatedly layering is added in batches, while hot wind is continuously fed into furnace, melting
After 15-17 hours, the molten iron of generation pours into casting sand type, casts pig iron.
As advanced optimizing for the technical program, obtained solid slag in step S3, S6, is by into reactor
Stabilizer, dispersing agent is added, then pass to saturated vapor or using electric heating, so that the temperature in reactor is reached 90 DEG C, then
Constant temperature 10-20 minutes, solid slag is allowed to carry out chemical dehydration synthetic reaction at this temperature.
As advanced optimizing for the technical program, oxidant is chlorine dioxide, ratio 1-50mg/ in the step S1
L is adjusted pH value 7 in a neutralization chamber using neutralisation three times, and pH value is adjusted to 9.5-11 in secondary neutralization chamber, and
Mixing speed mixes in step S1, the sealing of this process reaction kettle state, no volatile hydrogen chloride.
As advanced optimizing for the technical program, in the step S3, step S6 after precipitation and separation, in three times and
PH value is adjusted in slot in 6.5-8.5, reaches outlet after discharge standard.
As advanced optimizing for the technical program, around supernatant liquor obtained by the step S3 plus magnetic field, supernatant liquor
The processing water as obtained, is separated by solid-liquid separation it.
As advanced optimizing for the technical program, mesh screen is used when pouring out supernatant liquor in the step S3.
As advanced optimizing for the technical program, time of repose is 0.5~48h in the step S2, step S5.
A kind of technical effect and advantage of the invention: side that micro heavy is separated from iron content acid solution of the present invention
Method changes the method for separating micro heavy in traditional iron acid solution, iron acid solution is gradually classified step by step
Carry out refine, using heat, add oxidant, solid slag is centrifuged and is dried to obtain the program of solid, then will pour out upper layer
Clear liquid recycling is spare, carries out heat treatment concentration to clear liquid and refines again, adequately effectively utilizes iron content acid solution, prevent to mention
Not clean phenomenon is refined, then by obtained solid and sediment, is smelted into iron through hot blown iron furnace, hot-blast stove is dried effect and is conducive to well
Iron forms, time and additive component ratio in each group of step of stringent control, to micro heavy in iron acid solution point
From and refine iron content it is purer, high-efficient, and by obtained ferro element melting be ingot iron, convenient for storage storage and
Post-production is used at other products.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, to this
Invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work
Every other embodiment obtained is put, shall fall within the protection scope of the present invention.
Embodiment 1
A kind of method separating micro heavy from iron content acid solution provided by the invention, specifically includes following production
Step:
S1: by iron content acid solution into heating tank, to solution, totally concentration falls 30%；
S2: into step S1, gains add oxidant, and are stirred, and stand；
S3: pouring out supernatant liquor for gains in step 2, obtained solid slag is centrifuged, dry collect it is spare, then will be upper
Layer clear liquid recycling is spare；
S4: heating 50~80 DEG C for gained supernatant liquor in step S3 and carry out heat treatment concentration, natural after the completion of heat treatment
It is cooled to room temperature, stands；
S5: oxidant stirring will be added in the supernatant liquor stood in step S4, stands；
S6: pouring out supernatant liquor for the gains stood in step S5, obtain sediment, by gained sediment pass through from
The heart, drying are collected spare；
S7: by obtained solid in step S3, S6 and sediment, iron is smelted into through hot blown iron furnace；
A, it is stirred evenly using electrode paste, quartz sand, clay and makees furnace lining, three's weight ratio is 3: 2: 1；
B, it is ignited with wood shavings 3g, dry firewood 10kg, uses coke 20kg that furnace bottom is added as stock column, hot-blast stove is dried,
Until furnace lining is aglow；
C, at supplement addition coke to the above 600mm of iron-smelting furnace ventilation opening；
D, melting: by solid and sediment, repeatedly layering is added in batches, while hot wind is continuously fed into furnace, melting 15
After hour, the molten iron of generation pours into casting sand type, casts pig iron.
Specifically, obtained solid slag in step S3, S6, is by the way that stabilizer, dispersing agent are added into reactor, so
After be passed through saturated vapor or using electric heating, so that the temperature in reactor is reached 90 DEG C, then constant temperature 10 minutes, allow solid slag to exist
Chemical dehydration synthetic reaction is carried out at a temperature of this, high-efficiency dehydration is conducive to the later period to solid slag processing.
Specifically, oxidant is chlorine dioxide, ratio 1-50mg/L, using neutralisation three times, In in the step S1
Neutralization chamber adjusts pH value 7, and pH value is adjusted to 9.5 in secondary neutralization chamber, and mixing speed mixes in step S1, this
The sealing of process reaction kettle state, no volatile hydrogen chloride.
Specifically, adjusting pH value in neutralization chamber three times in the step S3, step S6 after precipitation and separation 6.5, reaching
Outlet after to discharge standard reduces the pollution to environment.
Specifically, around supernatant liquor obtained by the step S3 plus magnetic field, supernatant liquor is obtained processing water, to it
It is separated by solid-liquid separation, good separating effect is high-efficient.
Specifically, using mesh screen when pouring out supernatant liquor in the step S3, remaining slag in clear liquid may filter that out.
Specifically, time of repose is 0.5~10h in the step S2, step S5.
Embodiment 2
A kind of method separating micro heavy from iron content acid solution provided by the invention, specifically includes following production
Step:
S1: by iron content acid solution into heating tank, to solution, totally concentration falls 30%；
S2: into step S1, gains add oxidant, and are stirred, and stand；
S3: pouring out supernatant liquor for gains in step 2, obtained solid slag is centrifuged, dry collect it is spare, then will be upper
Layer clear liquid recycling is spare；
S4: heating 90~120 DEG C for gained supernatant liquor in step S3 and carry out heat treatment concentration, natural after the completion of heat treatment
It is cooled to room temperature, stands；
S5: oxidant stirring will be added in the supernatant liquor stood in step S4, stands；
S6: pouring out supernatant liquor for the gains stood in step S5, obtain sediment, by gained sediment pass through from
The heart, drying are collected spare；
S7: by obtained solid in step S3, S6 and sediment, iron is smelted into through hot blown iron furnace；
A, it is stirred evenly using electrode paste, quartz sand, clay and makees furnace lining, three's weight ratio is 3: 2: 1；
B, it is ignited with wood shavings 4g, dry firewood 12kg, uses coke 25kg that furnace bottom is added as stock column, hot-blast stove is dried,
Until furnace lining is aglow；
C, at supplement addition coke to the above 650mm of iron-smelting furnace ventilation opening；
D, melting: by solid and sediment, repeatedly layering is added in batches, while hot wind is continuously fed into furnace, melting
After 116 hours, the molten iron of generation pours into casting sand type, casts pig iron.
Specifically, obtained solid slag in step S3, S6, is by the way that stabilizer, dispersing agent are added into reactor, so
After be passed through saturated vapor or using electric heating, so that the temperature in reactor is reached 90 DEG C, then constant temperature 15 minutes, allow solid slag to exist
Chemical dehydration synthetic reaction is carried out at a temperature of this.
Specifically, oxidant is chlorine dioxide, ratio 1-50mg/L, using neutralisation three times, In in the step S1
Neutralization chamber adjusts pH value 7, and pH value is adjusted to 10 in secondary neutralization chamber, and mixing speed mixes in step S1, this
The sealing of process reaction kettle state, no volatile hydrogen chloride.
Specifically, adjusting pH value in neutralization chamber three times in the step S3, step S6 after precipitation and separation 7.5, reaching
Outlet after to discharge standard.
Specifically, around supernatant liquor obtained by the step S3 plus magnetic field, supernatant liquor is obtained processing water, to it
It is separated by solid-liquid separation.
Specifically, using mesh screen when pouring out supernatant liquor in the step S3.
Specifically, time of repose is 15~20h in the step S2, step S5.
Embodiment 3
A kind of method separating micro heavy from iron content acid solution provided by the invention, specifically includes following production
Step:
S1: by iron content acid solution into heating tank, to solution, totally concentration falls 30%；
S2: into step S1, gains add oxidant, and are stirred, and stand；
S3: pouring out supernatant liquor for gains in step 2, obtained solid slag is centrifuged, dry collect it is spare, then will be upper
Layer clear liquid recycling is spare；
S4: gained supernatant liquor in step S3 is heated 120~180 DEG C and carries out heat treatment concentration, after the completion of heat treatment certainly
It is so cooled to room temperature, stands；
S5: oxidant stirring will be added in the supernatant liquor stood in step S4, stands；
S6: pouring out supernatant liquor for the gains stood in step S5, obtain sediment, by gained sediment pass through from
The heart, drying are collected spare；
S7: by obtained solid in step S3, S6 and sediment, iron is smelted into through hot blown iron furnace；
A, it is stirred evenly using electrode paste, quartz sand, clay and makees furnace lining, three's weight ratio is 3: 2: 1；
B, it is ignited with wood shavings 5g, dry firewood 5kg, uses coke 30kg that furnace bottom is added as stock column, hot-blast stove is dried, directly
Until furnace lining is aglow；
C, at supplement addition coke to the above 700mm of iron-smelting furnace ventilation opening；
D, melting: by solid and sediment, repeatedly layering is added in batches, while hot wind is continuously fed into furnace, melting 17
After hour, the molten iron of generation pours into casting sand type, casts pig iron.
Specifically, obtained solid slag in step S3, S6, is by the way that stabilizer, dispersing agent are added into reactor, so
After be passed through saturated vapor or using electric heating, so that the temperature in reactor is reached 90 DEG C, then constant temperature 20 minutes, allow solid slag to exist
Chemical dehydration synthetic reaction is carried out at a temperature of this.
Specifically, oxidant is chlorine dioxide, ratio 1-50mg/L, using neutralisation three times, In in the step S1
Neutralization chamber adjusts pH value 7, and pH value is adjusted to 11 in secondary neutralization chamber, and mixing speed mixes in step S1, this
The sealing of process reaction kettle state, no volatile hydrogen chloride.
Specifically, adjusting pH value in neutralization chamber three times in the step S3, step S6 after precipitation and separation 8.5, reaching
Outlet after to discharge standard.
Specifically, around supernatant liquor obtained by the step S3 plus magnetic field, supernatant liquor is obtained processing water, to it
It is separated by solid-liquid separation.
Specifically, using mesh screen when pouring out supernatant liquor in the step S3.
Specifically, time of repose is 20~48h in the step S2, step S5.
In summary: a kind of method that micro heavy is separated from iron content acid solution of the present invention changes traditional iron
The method that micro heavy is separated in acid solution, refine by what iron acid solution was gradually classified step by step, uses
It heats, add oxidant, solid slag centrifugation and be dried to obtain the program of solid, then will to pour out supernatant liquor recycling spare, it is right
Clear liquid carries out heat treatment concentration and refines again, adequately effectively utilizes iron content acid solution, prevents to refine not clean phenomenon, then
By obtained solid and sediment, it is smelted into iron through hot blown iron furnace, hot-blast stove dries effect and is conducive to iron molding, stringent control well
Time and additive component ratio in each group of step, the content that micro heavy in iron acid solution is separated and is refined
High, high-efficient, obtained ferro element is high, and is ingot iron by obtained ferro element melting, adds convenient for storage storage and later period
Work is used at other products.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (7)
1. a kind of method for separating micro heavy from iron content acid solution, it is characterised in that: specifically include following production step
It is rapid:
S1: by iron content acid solution into heating tank, to solution, totally concentration falls 30%；
S2: into step S1, gains add oxidant, and are stirred, and stand；
S3: pouring out supernatant liquor for gains in step 2, obtained solid slag is centrifuged, dry collect it is spare then upper layer is clear
Liquid recycling is spare；
S4: gained supernatant liquor in step S3 is heated 50~180 DEG C and carries out heat treatment concentration, natural cooling after the completion of heat treatment
To room temperature, stand；
S5: oxidant stirring will be added in the supernatant liquor stood in step S4, stands；
S6: the gains stood in step S5 are poured out into supernatant liquor, obtain sediment, gained sediment is centrifuged, is done
It is dry collect it is spare；
S7: by obtained solid in step S3, S6 and sediment, iron is smelted into through hot blown iron furnace；
A, it is stirred evenly using electrode paste, quartz sand, clay and makees furnace lining, three's weight ratio is 3: 2: 1；
B, it is ignited with wood shavings 3-5g, dry firewood 10-15kg, uses coke 20-30kg that furnace bottom is added as stock column, hot-blast stove is baked
It is dry, until furnace lining is aglow；
C, at supplement addition coke to the above 600mm-700mm of iron-smelting furnace ventilation opening；
D, melting: by solid and sediment, repeatedly layering is added in batches, while hot wind is continuously fed into furnace, melting 15-17
After hour, the molten iron of generation pours into casting sand type, casts pig iron.
2. a kind of method for separating micro heavy from iron content acid solution according to claim 1, it is characterised in that:
Obtained solid slag in step S3, S6 is to then pass to saturated vapor by the way that stabilizer, dispersing agent are added into reactor
Or utilize electric heating, so that the temperature in reactor is reached 90 DEG C, then constant temperature 10-20 minutes, allow solid slag at this temperature into
Row chemical dehydration synthetic reaction.
3. a kind of method for separating micro heavy from iron content acid solution according to claim 1, it is characterised in that:
Oxidant is chlorine dioxide in the step S1, ratio 1-50mg/L, using neutralisation three times, in a neutralization chamber by pH value
It adjusts 7, pH value is adjusted to 9.5-11 in secondary neutralization chamber, and mixing speed mixes in step S1, this process reaction kettle shape
State sealing, no volatile hydrogen chloride.
4. a kind of method for separating micro heavy from iron content acid solution according to claim 1, it is characterised in that:
In the step S3, step S6 after precipitation and separation, pH value is adjusted in neutralization chamber three times in 6.5-8.5, reaches discharge standard
Outlet afterwards.
5. a kind of method for separating micro heavy from iron content acid solution according to claim 1, it is characterised in that:
Around supernatant liquor obtained by the step S3 plus magnetic field, supernatant liquor are obtained processing water, are separated by solid-liquid separation to it.
6. a kind of method for separating micro heavy from iron content acid solution according to claim 1, it is characterised in that:
Mesh screen is used when pouring out supernatant liquor in the step S3.
7. a kind of method for separating micro heavy from iron content acid solution according to claim 1, it is characterised in that:
Time of repose is 0.5~48h in the step S2, step S5.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1654685A (en) * | 2005-02-25 | 2005-08-17 | 刘利民 | Method for extracting pig iron by using dust of iron powder plant |
| US20060054565A1 (en) * | 2002-06-27 | 2006-03-16 | Pavel Koren | Method for the removal of contaminant metal ions from waste water |
| WO2010043764A1 (en) * | 2008-10-13 | 2010-04-22 | Talvivaaran Kaivososakeyhtiö Oyj | Process for extracting iron from an aqueous acid solution |
| CN103964660A (en) * | 2014-05-20 | 2014-08-06 | 钱占虎 | Process for recycling sludge generated in treatment of iron-containing acidic wastewater |
| US20160159669A1 (en) * | 2014-12-04 | 2016-06-09 | Exxonmobil Research And Engineering Company | Removal of metals from wastewater |
| CN109095643A (en) * | 2018-08-30 | 2018-12-28 | 西北矿冶研究院 | Method for reducing heavy metal ions in mineral processing wastewater |
-
2019
- 2019-08-19 CN CN201910761577.7A patent/CN110482766A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060054565A1 (en) * | 2002-06-27 | 2006-03-16 | Pavel Koren | Method for the removal of contaminant metal ions from waste water |
| CN1654685A (en) * | 2005-02-25 | 2005-08-17 | 刘利民 | Method for extracting pig iron by using dust of iron powder plant |
| WO2010043764A1 (en) * | 2008-10-13 | 2010-04-22 | Talvivaaran Kaivososakeyhtiö Oyj | Process for extracting iron from an aqueous acid solution |
| CN103964660A (en) * | 2014-05-20 | 2014-08-06 | 钱占虎 | Process for recycling sludge generated in treatment of iron-containing acidic wastewater |
| US20160159669A1 (en) * | 2014-12-04 | 2016-06-09 | Exxonmobil Research And Engineering Company | Removal of metals from wastewater |
| CN109095643A (en) * | 2018-08-30 | 2018-12-28 | 西北矿冶研究院 | Method for reducing heavy metal ions in mineral processing wastewater |
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