CN105692828B - The methods and applications of polysilicate sulfuric acid ferric flocculant are prepared with niobium-tantalum ore waste residue - Google Patents
The methods and applications of polysilicate sulfuric acid ferric flocculant are prepared with niobium-tantalum ore waste residue Download PDFInfo
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- CN105692828B CN105692828B CN201610075539.2A CN201610075539A CN105692828B CN 105692828 B CN105692828 B CN 105692828B CN 201610075539 A CN201610075539 A CN 201610075539A CN 105692828 B CN105692828 B CN 105692828B
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
Abstract
The invention discloses a kind of applications of method and processing heavy metal in waste water, turbidity, coloration etc. that polysilicate sulfuric acid ferric flocculant (PFSS) is prepared with niobium-tantalum ore waste residue.It is to leach the waste residue of tantalum niobium as raw material using niobium-tantalum ore, waste residue strains wash rice supernatant after the waste water clarification that flotation tin generates and obtains ferrous sulfate solution, oxidation processes are carried out to the organic matter in solution using Fenton reagent method and obtain ferrum sulfuricum oxydatum solutum, a certain amount of sodium silicate solution is added in sulfur acid ferrous solution, polymerization reaction occurs, it stands, filter, is dry to get PFSS flocculant.The present invention prepares PFSS flocculant using trade waste, both realizes and fully and rationally uses to waste, reduce cost, and is able to achieve the improvement to waste water, protects environment.PFSS flocculant of the invention is suitable for processing heavy metal in waste water, turbidity, coloration etc., and removal rate is up to 95% or more, and easy to operate, time-consuming short, treatment effect is obvious, with good economic efficiency and environmental benefit, has important application value.
Description
Technical field
The invention belongs to water process and water prevention and cure of pollution field more particularly to a kind of polysilicon acid is prepared with niobium-tantalum ore waste residue
The methods and applications of ferric sulfate flocculant.
Background technique
Flocculant plays a very important role in terms of field of environment protection, especially wastewater treatment.Polysilicate sulfuric acid
Iron (PFSS) is a kind of composite efficient low consumption, inorganic polymer flocculant without secondary pollution, it is with good stability with
And sedimentation screen is caught effect and is electrically neutralized, the function of compression double electric layer.PFSS be used to handle waste water, to the heavy metal in waste water from
Son and COD (COD), biochemical oxygen demand (BOD) (BOD), suspended solid (SS), coloration etc. have good removal effect.By
It is nontoxic in polysilicon acid polyferric sulfate, it can also be used to purifying drinking water, thus obtained the extensive concern of researchers at home and abroad.
Some patent documents prepare ferric sulfate by ferrous sulfate direct oxidation or catalysis oxidation, then anti-with sodium metasilicate
Polysilicon acid polyferric sulfate flocculant should be prepared, to utilize catalyst, such as sodium nitrite in catalytic oxidation process, and sodium nitrite has
It is toxic, be not suitable for handling waste water.It is also disclosed in the prior art using sodium metasilicate, iron ore as raw material, first passes through iron ore
Stone mill is calcined at Iron Ore Powder, then under conditions of 750 ~ 900 degree, and sulfuric acid is then added and carries out reaction generation ferric sulfate, by sulfuric acid
Iron is added in the solution of sodium metasilicate, is polymerize under certain ferrosilicon when appropriate acidity condition, followed by aging to obtain PFSS,
These preparation processes are complicated, time-consuming, at high cost, it is difficult to a wide range of to promote and apply.
Niobium tantalum material is led in electronics, high technology ceramics, precision glass, electronics optical device, hard alloy, special steel, superconduction etc.
Domain has been widely used, and the grade of niobium tantalum only has 1 to 5/10000th or so in niobium-tantalum ore, wherein containing the gold such as a large amount of iron
Belong to element, the iron-content of niobium-tantalum ore generally between 20 ~ 40% and contain a certain amount of tin.Nb-Ta mineral by hydrofluoric acid and
After sulfuric acid mixed acid extracts niobium tantalum, a large amount of waste residue is generated, overwhelming majority manufacturer is not subject to these waste residues at present
It utilizes, is stored up generally as solid waste, not only increase production cost, but also a large amount of resource of waste, the ferrous sulfate being percolated out is also
It pollutes the environment.A small number of smelteries Ni Tan using niobium tantalum waste residue carry out recycling benefit to the tin in waste residue by the method for flotation
With, and the ferrous sulfate in waste residue is not all used generally.Waste residue passes through can contain in the waste water discharged after flotation tin
There is about 7 ~ 12% ferrous sulfate, COD is 2000 ~ 4500 mg/L, and pH value is 1.7 ~ 3, these waste water need up to standard by handling
It could discharge.It is precipitated in addition, the ferrous sulfate in waste residue is easy to crystallize from slag, blocks pipeline, not only caused to environment dirt
Dye, and waste a large amount of available resources.In addition the high COD in waste water need to handle it is up to standard after could discharge.Therefore, it studies
The comprehensive utilization of niobium-tantalum ore waste, while the waste water for handling the high COD of discharge has great importance.
Fenton (Fenton) reagent method is a kind of method that can effectively remove waste water COD.Fenton reagent method is in pH
For value to carry out Fenton with hydrogen peroxide using ferrous ion and reacting under conditions of 2 ~ 3, generating has the hydroxyl of extremely strong oxidisability certainly
By base, hydroxyl radical free radical energy non-selectivity mineralising organic pollutant, the especially organic dirt of the persistence in oxidative degradation waste water
There is unique advantage in dye object space face.But while organic matter of the Fenton reagent method in oxidized waste water, in ferrous sulfate
Ferrous ion can be converted to iron ion, to generate sulfur acid iron cement, these sulfuric acid iron cements needs are dealt carefully with, and otherwise can generate
Greatly harm, such as: occupy a large amount of soils；Sulfuric acid iron cement, which is stacked, can generate high temperature or other chemistry by wind and weather
Reaction, destroys the structure of soil；Direct emission swims product riverbed, serious polluted-water；After sulfuric acid iron cement is decomposed by microbiological oxidation
Pernicious gas, dust etc. are released, the pollution of atmosphere can be aggravated.Sulfuric acid iron cement is a kind of raw material for preparing bodied ferric sulfate.Cause
This, studying a kind of has been rationally very necessary using the method that sulfur acid ferrous iron waste residue prepares flocculant.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the shortcomings of to mention in background above technology and defect, provide one
Kind can rationally utilize the preparation method and application of the polysilicate sulfuric acid ferric flocculant of sulfur acid ferrous iron waste residue.
In order to solve the above technical problems, technical solution proposed by the present invention are as follows:
A method of polysilicate sulfuric acid ferric flocculant is prepared with niobium-tantalum ore waste residue, comprising the following steps: firstly, by niobium
Tantalite waste residue carries out flotation tin, extracts valuable metal element, the flotation tin waste water of generation is by straining wash rice supernatant after clarification, so
After take supernatant that oxidant is added to carry out Fenton's reaction while stirring, sodium silicate solution is added after reacting a period of time, until pH
Value stops being added when reaching 2 ~ 4, continues 1 ~ 2h of stirring, stands, and filters, dry, and polysilicate sulfuric acid ferric flocculant can be obtained；Institute
State the ferrous sulfate for being 7 ~ 12% containing mass fraction in flotation tin waste water.
Using niobium-tantalum ore waste residue as raw material, niobium-tantalum ore waste residue was not only disposed, but also realize to the abundant of waste
It rationally utilizes, i.e. the treatment of wastes with processes of wastes against one another；It reacts to obtain ferric sulfate by Fenton and silicic acid sodium polymerization prepares PFSS flocculant, polymerizeing
Process does not need additional acid to adjust pH value, can not only comprehensively utilize to sulfur acid ferrous solution, reduces sulfuric acid iron cement
Influence to environment, and can simplify operation, the cost of production flocculant is reduced, the removal to COD in waste water had both been realized,
It again can be rationally using sulfur acid ferrous solution as the raw material of flocculant.
The above-mentioned method for preparing polysilicate sulfuric acid ferric flocculant with niobium-tantalum ore waste residue, it is preferred that the oxidant is
Hydrogen peroxide, the concentration of the hydrogen peroxide are 10 ~ 30%；The additional amount of the hydrogen peroxide be every 50 ~ 100mL supernatant be added 1 ~
3mL。
Preferably, the reaction time of the Fenton's reaction is 1 ~ 2h；The time of the standing is 1 ~ 2h；The temperature of the drying
Degree is 40 ~ 60 DEG C, and the dry time is 6 ~ 12h.
Preferably, the mass fraction of the middle sodium metasilicate of the sodium silicate solution is 5 ~ 10%；The preparation of the sodium silicate solution
Method obtains sodium silicate solution after stirring 10 ~ 20min the following steps are included: sodium metasilicate is dissolved in water.
Based on a total technical concept, the present invention also provides a kind of polysilicate sulfuric acids prepared by the above method
Application of the ferric flocculant in processing heavy metal wastewater thereby field.
Above-mentioned polysilicate sulfuric acid ferric flocculant includes the following steps: in the application in processing heavy metal wastewater thereby field
Firstly, taking the poly-silicic acid iron sulfate that the poly-silicic acid iron sulfate flocculating agent formulation is 100 ~ 120 g/L at concentration
Solution, then by the waste water tune pH containing heavy metal ion be 5.5 ~ 7.0, make its precipitating, the polysilicon acid sulphur of above-mentioned preparation be then added
Sour ferrous solution is stood after stirring 1 ~ 2min；The additional amount of the polysilicate sulfuric acid ferrous solution is that every milliliter of waste water is added
0.001 ~ 0.0015mL polysilicate sulfuric acid ferrous solution.
Based on a total design, the present invention also provides a kind of poly-silicic acid iron sulfates prepared by the above method to wad a quilt with cotton
Application of the solidifying agent in processing high-turbidity water field.
Above-mentioned polysilicate sulfuric acid ferric flocculant includes the following steps: in the application in processing high-turbidity water field
Firstly, taking the poly-silicic acid iron sulfate flocculating agent formulation molten at the poly-silicic acid iron sulfate that concentration is 80 ~ 100 g/L
Liquid, then by the waste water tune pH containing high concentrtion be 5.0 ~ 10.0, make its precipitating, the poly-silicic acid iron sulfate that above-mentioned preparation is then added is molten
Liquid is stood after stirring 1-2min；The additional amount of the polysilicate sulfuric acid ferrous solution is that 0.001- is added in every milliliter of waste water
0.002mL polysilicate sulfuric acid ferrous solution.
Based on a total design, the present invention also provides a kind of poly-silicic acid iron sulfates prepared by the above method to wad a quilt with cotton
Application of the solidifying agent in processing high-colour intensity wastewater field.
Above-mentioned polysilicate sulfuric acid ferric flocculant includes the following steps: in the application in processing high-colour intensity wastewater field
Firstly, taking the poly-silicic acid iron sulfate flocculating agent formulation molten at the poly-silicic acid iron sulfate that concentration is 80 ~ 120 g/L
Liquid, then by the waste water tune pH containing high chroma be 6.0 ~ 9.0, make its precipitating, the poly-silicic acid iron sulfate that above-mentioned preparation is then added is molten
Liquid is stood after stirring 1 ~ 2min；The additional amount of the polysilicate sulfuric acid ferrous solution be every milliliter of waste water be added 0.001 ~
0.002mL polysilicate sulfuric acid ferrous solution.
Poly-silicic acid iron sulfate prepared by the preparation method, flocculant have very strong flocculation ability, can compared with
There is very strong flocculating setting ability to suspended matter, coloration, organic matter and the heavy metal in waste water in wide pH value range,
The application of heavy metal wastewater thereby, high-turbidity water and high-colour intensity wastewater field is handled, easy to operate, time-consuming short, treatment effect is obvious,
With good economic efficiency and environmental benefit has important application value.
The present invention is based on following technical principle: contain ferrous sulfate in the waste water that niobium-tantalum ore smelting process generates,
And the pH value of waste water is relatively low, the pH value range in Fenton reaction.After oxidant is added, is reacted and aoxidized by Fenton
COD in waste water, while sulfur acid ferrous solution is generated, using the sulfur acid ferrous solution and silicic acid sodium polymerization, can be prepared
Polysilicate sulfuric acid ferric flocculant.
Compared with prior art, the invention has the benefit that
1. the present invention, as raw material, has not only disposed niobium-tantalum ore waste residue using niobium-tantalum ore waste residue, but also realizes to discarded
Object fully and rationally uses, i.e. the treatment of wastes with processes of wastes against one another；Then it reacts to obtain ferric sulfate by Fenton and silicic acid sodium polymerization prepares PFSS
Flocculant, use Fenton reaction generate sulfur acid ferrous solution be raw material production polysilicon acid polyferric sulfate, polymerization process not
Additional acid is needed to adjust pH value, sulfur acid ferrous solution can not only be comprehensively utilized, and reduces sulfuric acid iron cement to environment
Influence, and can simplify operation, reduce the cost of production flocculant, not only realized the removal to COD in waste water, but also can close
Reason is using sulfur acid ferrous solution as the raw material of flocculant.
2. there is very strong flocculation ability by the PFSS flocculant that the present invention is prepared, it can be in wider pH value range
The interior suspended matter in waste water, coloration, organic matter and heavy metal have very strong flocculating setting ability, useless in processing heavy metal
The application of water, high-turbidity water and high-colour intensity wastewater field, heavy metal, turbidity, chroma removal rate are easy to operate up to 95% or more,
Time-consuming short, treatment effect is obvious, with good economic efficiency and environmental benefit, has important application value.
3. the present invention provides new raw material sources for the preparation of PFSS flocculant, provided for the exploitation of niobium-tantalum ore
New processing method, while waste water treatment being combined with recycling, new thinking is provided for waste water treatment approach.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the scanning electron microscope (SEM) photograph of polysilicon acid polyferric sulfate in embodiment 1.
Fig. 2 is the x-ray diffraction pattern of polysilicon acid polyferric sulfate in embodiment 1.
Fig. 3 is the x-ray diffraction pattern of polysilicon acid polyferric sulfate in embodiment 2.
Specific embodiment
To facilitate the understanding of the present invention, the present invention is done below in conjunction with Figure of description and preferred embodiment more complete
Face meticulously describes, but protection scope of the present invention is not limited to following specific embodiments.
Unless otherwise defined, all technical terms used hereinafter are generally understood meaning phase with those skilled in the art
Together.Technical term used herein is intended merely to the purpose of description specific embodiment, and it is of the invention to be not intended to limitation
Protection scope.
Unless otherwise specified, various raw material, reagent, the instrument and equipment etc. used in the present invention can pass through city
Field is commercially available or can be prepared by existing method.
Embodiment 1:
A method of PFSS flocculant is prepared with niobium-tantalum ore waste residue, comprising the following steps:
Firstly, niobium-tantalum ore waste residue is carried out flotation tin, obtain after extracting valuable metal element containing 7% ferrous sulfate
Flotation tin waste water, after flotation tin waste water clarification after by straining wash rice supernatant, then take supernatant 100mL be added 3 ml concentration be
28% hydrogen peroxide carries out Fenton reaction as oxidant while stirring, and the sodium metasilicate that mass fraction is 5% is added after reacting 1h
(preparation method of sodium silicate solution obtains silicic acid after stirring 10 ~ 20min the following steps are included: sodium metasilicate is dissolved in water to solution
Sodium solution), until pH value stops being added when reaching 2, continues to stir 2h, will be filtered after obtained PFSS solution left standstill 1h, 40
12h is dried under the conditions of DEG C to get solid PFSS is arrived.
The present embodiment prepares resulting PFSS scanning electron microscope (SEM) photograph as shown in Figure 1, as seen from the figure, being prepared by the present invention
PFSS polymer is in the form of sheets.The XRD of PFSS polymer such as Fig. 2, as seen from Figure 2, crystalline material is not detected in PFSS, is not present
Fe2(SO4)3、Fe2O3、Fe(OH)3、Fe3O4And SiO2The diffraction maximum of equal substances, illustrates Fe3+、Si4+、SO4 2 -Equal substances have been joined
Having added reaction and the present embodiment to prepare resulting PFSS is amorphous polymer.
Embodiment 2:
A method of PFSS flocculant is prepared with niobium-tantalum ore waste residue, comprising the following steps:
Firstly, niobium-tantalum ore waste residue is carried out flotation tin, obtain after extracting valuable metal element containing 11% ferrous sulfate
Flotation tin waste water, by straining wash rice supernatant after the clarification of flotation tin waste water, then taking supernatant 50mL that 1 ml concentration is added is 20%
Hydrogen peroxide carry out Fenton reaction while stirring as oxidant, react that the sodium metasilicate that mass fraction is 10% is added after 2h is molten
(preparation method of sodium silicate solution obtains sodium metasilicate after stirring 10 ~ 20min the following steps are included: sodium metasilicate is dissolved in water to liquid
Solution), until pH value stops being added when reaching 4, continues to stir 2h, will be filtered after obtained PFSS solution left standstill 2h, at 60 DEG C
Under the conditions of drying 6h to get arrive solid PFSS.
The XRD of PFSS polymer such as Fig. 3, as seen from Figure 3, crystalline material is not detected in PFSS, and Fe is not present2(SO4)3、
Fe2O3、Fe(OH)3、Fe3O4And SiO2The diffraction maximum of equal substances, illustrates Fe3+And SO4 2 -Equal substances have participated in reaction, and
It is amorphous polymer that the present embodiment, which prepares resulting PFSS,.
Embodiment 3:
A kind of application by the PFSS flocculant of the invention being prepared in processing lead waste water field, including walk as follows
It is rapid:
Firstly, the PFSS for taking the present invention to prepare, is configured to the PFSS solution that concentration is 100 g/L；Take plumbum ion concentration
It is put into conical flask for 400 mL of lead solution of 50 mg/L for simulating lead waste water, adjusting pH is 7.0, makes its precipitating, turbidity is
73.1 degree, the PFSS solution 0.6mL of above-mentioned preparation, 1 min of moderate-speed mixer is then added, measures waste water after standing 30 min
Lead concentration and supernatant fluid turbidity.
Lead concentration uses Atomic Absorption Spectrometry, and supernatant fluid turbidity is measured at 680 nm using spectrophotometer.Through
The lead concentration of measurement, processed waste water is 0.57 mg/L, and metal ion removal rate reaches 98% or more；Turbidity is 2.83 degree, is gone
Turbid rate reaches 96% or more.It can be seen that the PFSS flocculant being prepared by the present invention answering in processing lead waste water field
With easy to operate, time-consuming short, treatment effect is obvious.
Embodiment 4:
A kind of application by the PFSS flocculant of the invention being prepared in Treatment of Zinc-containing Wastewater field, including walk as follows
It is rapid:
Firstly, the PFSS for taking the present invention to prepare, is configured to the PFSS solution that concentration is 120 g/L；Take certain southern enterprise
400 mL of industrial wastewater is put into conical flask, and water sample zinc ion concentration is 30 mg/L, pH 6.0, anion SO4 2-, turbidity
It is 62.4 degree, the PFSS solution 0.4mL of above-mentioned preparation, 2 min of moderate-speed mixer is then added, measures waste water after standing 30 min
Zinc concentration and supernatant fluid turbidity.
Zinc concentration uses Atomic Absorption Spectrometry, and supernatant fluid turbidity is measured at 680 nm using spectrophotometer.Through
The zinc concentration of measurement, processed waste water is 0.42 mg/L, and metal ion removal rate reaches 98% or more；Turbidity is 3.12 degree, is gone
Turbid rate reaches 95%.It can be seen that application of the PFSS flocculant being prepared by the present invention in Treatment of Zinc-containing Wastewater field, behaviour
Make simply, time-consuming short, treatment effect is obvious.
Embodiment 5:
It is a kind of that the application of bentonite high-turbidity water is being handled by the PFSS flocculant of the invention being prepared, including walk as follows
It is rapid:
Firstly, the PFSS for taking the present invention to prepare, is configured to the PFSS solution that concentration is 80 g/L；Taking turbidity is 455 degree
400 mL of bentonite high-turbidity water in conical flask, then 0.6 mL of PFSS solution of above-mentioned preparation, middling speed is added in pH=6.5
1.5 min are stirred, the supernatant fluid turbidity of measurement waste water after 30 min is stood.
Supernatant fluid turbidity is measured at 680 nm using spectrophotometer, and after measured, the turbidity of processed waste water is 8.31
Degree, goes turbid rate to reach 98% or more.It can be seen that the PFSS flocculant being prepared by the present invention gives up in processing bentonite high concentrtion
The application in water field, easy to operate, time-consuming short, treatment effect is obvious.
Embodiment 6:
It is a kind of that the application of industrial high-turbidity water is being handled by the PFSS flocculant of the invention being prepared, including walk as follows
It is rapid:
Firstly, the PFSS for taking the present invention to prepare, is configured to the PFSS solution that concentration is 100 g/L；Take certain plant produced
For 400 mL of high-turbidity water that the turbidity generated in the process is 512 degree in conical flask, then above-mentioned preparation is added in pH=9.67
0.65 mL of PFSS solution, 2 min of moderate-speed mixer, stand 30 min after measure waste water supernatant fluid turbidity.
Supernatant fluid turbidity is measured at 680 nm using spectrophotometer, and after measured, the turbidity of processed waste water is 9.06
Degree, goes turbid rate to reach 98% or more.It can be seen that the PFSS flocculant being prepared by the present invention gives up in the industrial high concentrtion of processing
The application in water field, easy to operate, time-consuming short, treatment effect is obvious.
Embodiment 7:
It is a kind of by the PFSS flocculant that is prepared of the present invention in the application of processing waste water from dyestuff, include the following steps:
Firstly, the PFSS for taking the present invention to prepare, is configured to the PFSS solution that concentration is 120 g/L；Take 10 mg/L dyestuffs
Acid Orange II (C16H11N2NaO4S) then 0.6 mL of PFSS solution of above-mentioned preparation is added in conical flask in 400 mL of waste water, in
Speed 2 min of stirring, stand the supernatant absorbance of measurement waste water after 30 min.
Supernatant absorbance is measured using spectrophotometer at Acid Orange II maximum absorption wave strong point (484 nm), by extinction
Degree-concentration working curve is converted into Acid Orange II concentration of aqueous solution.The results show that percent of decolourization is up to 98.0% or more.It can be seen that
Application of the PFSS flocculant being prepared by the present invention in processing waste water from dyestuff field, easy to operate, time-consuming short, treatment effect
Obviously.
Claims (8)
1. a kind of method for preparing polysilicate sulfuric acid ferric flocculant with niobium-tantalum ore waste residue, comprising the following steps: firstly, by niobium tantalum
Iron ore waste residue carries out flotation tin, then the flotation tin waste water of generation takes supernatant that oxidation is added by straining wash rice supernatant after clarification
Agent carries out Fenton's reaction while stirring, and sodium silicate solution is added after reacting a period of time, until pH value stops adding when reaching 2~4
Enter, continue 1~2h of stirring, stand, filters, it is dry, polysilicate sulfuric acid ferric flocculant can be obtained；The oxidant is dioxygen
Water, the concentration of the hydrogen peroxide are 10~30%；The additional amount of the hydrogen peroxide be every 50~100mL supernatant be added 1~
3mL；The mass fraction of sodium metasilicate in the sodium silicate solution is 5~10%.
2. the method according to claim 1, wherein the reaction time of the Fenton's reaction is 1~2h；It is described quiet
The time set is 1~2h；The temperature of the drying is 40~60 DEG C, and the dry time is 6~12h.
3. a kind of polysilicate sulfuric acid ferric flocculant method according to claim 1 or 2 being prepared is useless in processing heavy metal
The application in water field.
4. application according to claim 3, includes the following steps:
Firstly, the polysilicate sulfuric acid ferrous solution that the poly-silicic acid iron sulfate flocculating agent formulation is 100~120g/L at concentration is taken,
It is again 5.5~7.0 by the waste water tune pH containing heavy metal ion, makes its precipitating, the poly-silicic acid iron sulfate of above-mentioned preparation is then added
Solution is stood after stirring 1~2min；The additional amount of the polysilicate sulfuric acid ferrous solution is that every milliliter of waste water is added 0.001
~0.0015mL polysilicate sulfuric acid ferrous solution.
5. a kind of polysilicate sulfuric acid ferric flocculant method according to claim 1 or 2 being prepared is useless in processing high concentrtion
The application in water field.
6. application according to claim 5, includes the following steps:
Firstly, the polysilicate sulfuric acid ferrous solution that the poly-silicic acid iron sulfate flocculating agent formulation is 80~100g/L at concentration is taken,
It is again 5.0~10.0 by the waste water tune pH containing high concentrtion, makes its precipitating, the poly-silicic acid iron sulfate that above-mentioned preparation is then added is molten
Liquid is stood after stirring 1-2min；The additional amount of the polysilicate sulfuric acid ferrous solution is that 0.001- is added in every milliliter of waste water
0.002mL polysilicate sulfuric acid ferrous solution.
7. a kind of polysilicate sulfuric acid ferric flocculant method according to claim 1 or 2 being prepared is useless in processing high chroma
The application in water field.
8. application according to claim 7, includes the following steps:
Firstly, the polysilicate sulfuric acid ferrous solution that the poly-silicic acid iron sulfate flocculating agent formulation is 80~120g/L at concentration is taken,
It is again 6.0~9.0 by the waste water tune pH containing high chroma, makes its precipitating, the polysilicate sulfuric acid ferrous solution of above-mentioned preparation is then added,
It is stood after stirring 1~2min；The additional amount of the polysilicate sulfuric acid ferrous solution be every milliliter of waste water be added 0.001~
0.002mL polysilicate sulfuric acid ferrous solution.
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| CN111686658A (en) * | 2020-05-09 | 2020-09-22 | 陈躬 | Device for preparing sewage/wastewater coagulant, sewage/wastewater coagulant and preparation method thereof |
| CN112047422B (en) * | 2020-09-16 | 2022-04-12 | 国投信开水环境投资有限公司 | Production process of composite phosphorus removal agent for sewage treatment |
| CN114634266A (en) * | 2022-04-21 | 2022-06-17 | 湖北大学 | Method for reducing COD value of waste acid in industrial production and application |
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| EP0958248B1 (en) * | 1996-04-16 | 2002-09-18 | Kemira Chemicals Oy | Process for the preparation of water purification solutions containing ferric iron and the use of the product as of obtained |
| CN103073100A (en) * | 2013-02-08 | 2013-05-01 | 河北大学 | Dextrin-modified polysilicon ferric sulfate composite flocculating agent and preparation method thereof |
| CN103846154A (en) * | 2012-12-05 | 2014-06-11 | 核工业北京地质研究院 | Method of recycling tin, niobium and tantalum from smelted tailings |
| CN104211153A (en) * | 2014-09-22 | 2014-12-17 | 陕西华陆化工环保有限公司 | Preparation method of polyiron silicate sulfate flocculant |
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2016
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0958248B1 (en) * | 1996-04-16 | 2002-09-18 | Kemira Chemicals Oy | Process for the preparation of water purification solutions containing ferric iron and the use of the product as of obtained |
| CN103846154A (en) * | 2012-12-05 | 2014-06-11 | 核工业北京地质研究院 | Method of recycling tin, niobium and tantalum from smelted tailings |
| CN103073100A (en) * | 2013-02-08 | 2013-05-01 | 河北大学 | Dextrin-modified polysilicon ferric sulfate composite flocculating agent and preparation method thereof |
| CN104211153A (en) * | 2014-09-22 | 2014-12-17 | 陕西华陆化工环保有限公司 | Preparation method of polyiron silicate sulfate flocculant |
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