CN103801258B - For the nickel slag sorbing material and preparation method thereof for the treatment of of Phosphorus Containing Waste Water - Google Patents
For the nickel slag sorbing material and preparation method thereof for the treatment of of Phosphorus Containing Waste Water Download PDFInfo
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- CN103801258B CN103801258B CN201410089441.3A CN201410089441A CN103801258B CN 103801258 B CN103801258 B CN 103801258B CN 201410089441 A CN201410089441 A CN 201410089441A CN 103801258 B CN103801258 B CN 103801258B
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Abstract
The invention discloses a kind of nickel slag sorbing material for treatment of Phosphorus Containing Waste Water and preparation method thereof.The present invention with industrial waste nickel slag and low cost aluminium hydroxide for primary raw material, through pretreatment of raw material, compressing, sintering and hydrothermal treatment consists, obtained renewable nickel slag sorbing material.The method technique is simple, and cost is low, and the sorbing material of preparation has a series of premium properties: porosity is high, and specific area is large, has good waste water dephosphorization performance; In addition, owing to adopting compressing method, the sorbent shapes of preparation, many sizes, can make column, sheet, bulk etc., and have good intensity, and the regeneration cycle that can realize adsorbent is recycled.By dephosphorization experimental verification, find that this kind of sorbing material has remarkable result to the P elements removed in waste water.The present invention not only achieves the recycling of industrial waste nickel slag, and provides new approaches for developing low-cost adsorbent, and with useless pollution treatment, application prospect is good.
Description
Technical field
The invention belongs to sorbing material preparation field, relate to comprehensive utilization and the wastewater treating technology of solid waste, be specifically related to a kind of nickel slag sorbing material for treatment of Phosphorus Containing Waste Water and preparation method thereof.
Background technology
Nickel slag is a kind of solid slag produced in metallic nickel and nickel alloy smelting process, i.e. a kind of granulated slag of being formed after shrend of its high-temperature molten, and its melting behaviors is with FeO-SiO
2be main, form different from the glassy phase of common blast-furnace cinder, phosphorus slag, slag and flyash etc., wherein CaO, MgO and Al
2o
3content is much lower, but SiO
2and Fe
2o
3content is high a lot.Nickel slag is a kind of AMAT, containing a small amount of CaO, Al in its amorphous phase
2o
3, thus under the exciting of alkaline medium, there is the potential hydraulicity, can a large amount of hyrates be generated, form the pore structure of spatial networks.In addition, the FeO in nickel slag amorphous phase is also a kind of active component, can generate Fe (OH) under the effect of alkali
2with Fe (OH)
3gel, is filled in the effect playing support frame in other hydrated product.The existence of these active components, makes nickel slag have potential characterization of adsorption.Due to the nickel slag cooling hourly velocity after high-temperature fusion is too fast can not abundant crystallization, thus the XRD collection of illustrative plates of nickel slag is buffed top, does not have characteristic diffraction peak.The chemical composition of nickel slag, because of the difference of ore source and smelting process, has larger difference, wherein contains SiO
2be 30 ~ 50wt%, Fe
2o
3be 30 ~ 60wt%, CaO be 1.5 ~ 5wt%, MgO be 1 ~ 15wt%, Al
2o
3be 2.5 ~ 6wt%, NiO be 3 ~ 6wt%.
Luoyuan, Fujian Baosteel moral is contained nickel industry nickel slag annual emissions and is reached more than 200 ten thousand tons, its a large amount of discharge, idlely not only needs land occupation or farmland, and causes very large pollution to Luoyuan Bay surrounding enviroment.At present, Baosteel moral contains nickel industry positive Accelerating The Construction second phase project, to forming the stainless steel production capacity of more than 3,000,000 tons, building up world-class green stainless steel production base, will produce more substantial waste residue as nickel slag, slag and flyash etc.Therefore, how effectively to dispose and utilize these waste residues just become a problem demanding prompt solution.
The domestic and international research for nickel slag at present, mainly concentrates on the useful element and production building materials and goods etc. that extract wherein.But along with the improvement of nickel fibers technique, nickel cobalt equal size is very low in the waste residue discharged, and extraction cost is high, do not possess and extract value, and it is also subject to the restriction of some standards in the application of other field.At present, most of nickel slag can only be processed by the mode of landfill, and recovery utilization rate is low.Therefore, the emphasis recycling of nickel slag being remained to research is at present strengthened.
Phosphorus is the one of the chief elements causing body eutrophication, and municipal wastewater and industrial and agricultural wastewater are the main causes causing natural water phosphorus to pollute.Under normal circumstances, the phosphorus content of municipal wastewater is 4.15mg/L (in phosphorus), the phosphorus content of industrial wastewater is often all at more than 10mg/L, before entering natural water, a small amount of P elements (even less than 1m/L) remaining after treated, through rich long-pending, also cause this problem of body eutrophication most probably.At present, water body dephosphorized technology mainly contains bioanalysis, coagulant sedimentation, absorption method, ion-exchange and membrane separation process.Bioanalysis dephosphorization is widely used, but also there is the shortcomings such as treatment facility is many, cost is high, operational management is complicated.Absorption method because of have economical and efficient, simple, to produce without mud and sorbing material the advantage such as can to regenerate and be used widely.
The key of adsorption effect quality is the difference of adsorbent.Pressure along with each side such as society, economy, the energy increases increasingly, it has been generally acknowledged that desirable sorbing material should possess following several feature: have the potentiality again developed after cheap, local rich reserves, industry byproduct, absorption are saturated.This viewpoint synchronously considers the improvement of polluted water body and the recycling of solid waste, is to realize economic interests and the dual-purpose effective means of Environmental security.According to domestic and foreign literature, the industry byproduct material of exploitation containing elemental compositions such as iron, aluminium, silicon, calcium, and the Adsorption it being effectively applied to water systems'phosphorus element becomes study hotspot.Nickel slag is a kind of composite oxides slag being rich in Si, Fe, Ca, Mg, Al element.And at present, with nickel slag, for primary raw material prepares adsorbent, to process the research of Phosphorus From Wastewater element, there is not been reported, this project belongs to the technology of first research invention both at home and abroad.
Summary of the invention
The object of the invention is to the problems such as nickel slag recovery utilization rate for industrial waste is low, a kind of nickel slag sorbing material for treatment of Phosphorus Containing Waste Water and preparation method thereof is provided.The present invention is not only industrial waste nickel slag and have found recycling new technology approach, administers polluted water body simultaneously, achieves the dual purpose of economic interests and environmental protection.
For achieving the above object, the present invention adopts following technical scheme:
For a nickel slag sorbing material for treatment of Phosphorus Containing Waste Water, raw material comprises nickel slag and Al (OH)
3.
Described nickel slag is the solid slag produced in metallic nickel and nickel alloy smelting process, and its composition is SiO
2be 30 ~ 50wt%, Fe
2o
3be 30 ~ 60wt%, CaO be 1.5 ~ 5wt%, MgO be 1 ~ 15wt%, Al
2o
3be 2.5 ~ 6wt%, NiO be 3 ~ 6wt%, in raw material, Al/Fe mol ratio is 0.5 ~ 2.
A kind of preparation for the method for the nickel slag sorbing material for the treatment of of Phosphorus Containing Waste Water be as above: with nickel slag, Al (OH)
3for raw material, through pretreatment, compressing, sintering and hydrothermal treatment consists, obtained renewable nickel slag sorbing material.
For the preparation method of the nickel slag sorbing material for the treatment of of Phosphorus Containing Waste Water, concrete steps are:
(1) pretreatment: nickel slag is placed in ball mill wet ball grinding 18 ~ 25 hours, the slurry of grinding takes out and is placed on 80 ~ 120 DEG C of oven dry moisture in electric heating air blast thermostatic drying chamber, then crosses 100 mesh sieves and obtains system material;
(2) compressing: the system material obtained by step (1) and Al (OH)
3be 0.5 ~ 2 add in batch mixer and mix rear obtained batch mixing by Al/Fe mol ratio; Add organic water and carry out granulation, mistake 50 mesh sieve after granulation completes, old 24 hours; Batch mixing is compressing;
(3) sintering and hydrothermal treatment consists: the sample after shaping was placed in air natural drying after 24 hours, is placed in chamber type electric resistance furnace and sinters, then cool to room temperature with the furnace; The sample burnt till is placed in water heating kettle, at 130 ~ 180 DEG C, carry out hydrothermal treatment consists, and the hydro-thermal time is 12 ~ 20 hours; Treat that water heating kettle cools, sample is dried, obtained nickel slag sorbing material.
Organic water described in step (2) is the polyvinyl alcohol water solution of volume fraction 20%; Every 100g batch mixing adds 5 ~ 10mL organic water.
Its temperature of sintering described in step (3) is 800 ~ 1100 DEG C, and heating rate is 5 DEG C/min, and temperature retention time is 2 hours.
Compressing described in step (2) need according to the addition adjustment pressure of the specification of mould and batch mixing and dwell time; As, batch mixing addition is 2.0g, and when being pressed into the disc-shaped sample of diameter 20.00mm, adjustment pressure is 2Mpa, and the dwell time is 10s.
Beneficial effect of the present invention is:
1) industrial waste nickel slag can be made full use of, alleviate its discharge or idle pollution on the environment in a large number, turn waste into wealth, with useless pollution treatment, ecological, environmental protective.
2) through the nickel slag sorbing material high adsorption capacity for treatment of Phosphorus Containing Waste Water prepared by the inventive method, applied range, not only can adsorb the phosphorus in waste water, can also adsorb other anion and heavy metal ion.
3) the method operating procedure is simple, and obtained nickel slag sorbing material recoverable, can not cause secondary pollution.
4) raw material sources of the present invention's employing are simple, and cost is low, possesses very significant economic benefit and social benefit, has very strong market competition ability.
Detailed description of the invention
The present invention's the following example further illustrates the present invention, but protection scope of the present invention is not limited to the following example.
The phosphorus-containing wastewater that following embodiment is used, uses AR KH
2pO
4be mixed with the phosphate stock solution (in P) of 50mg/L, then be diluted to required concentration by deionized water.
The nickel slag that following embodiment is used, its chemistry and mineral composition are SiO
2content 34.38wt%, Fe
2o
3content 45.84wt%, CaO content 3.37wt%, content of MgO 8.86wt%, Al
2o
3be 3 ~ 6wt% containing 2.26wt%, NiO, also have the element such as minute quantity Cu, Co.
embodiment 1
The Al/Fe mol ratio that this example utilizes nickel slag to develop for the composition of raw materials of the renewable sorbing material of waste water dephosphorization is 0.5, is converted into nickel slag and Al (OH)
3mass ratio be that every 100g nickel slag adds 18.92gAl (OH)
3.
This example utilizes the development of nickel slag for the method for the renewable sorbing material of waste water dephosphorization, and it comprises following steps:
(1) pretreatment
Nickel slag is placed in ball mill wet ball grinding 20 hours, the slurry of grinding takes out and to be placed in electric heating air blast thermostatic drying chamber 100 DEG C and to dry moisture, and then crossing 100 mesh sieves, to obtain system material for subsequent use.
(2) sample preparation
Nickel slag and the Al (OH) of 100 mesh sieves will be crossed after ball milling
3after weighing by formula (Al/Fe mol ratio 0.5, Al/Fe mass ratio 0.24), add in batch mixer and mix; Add organic water afterwards and carry out granulation, ratio is that every 100g raw material adds 7mL organic water, complete rear mistake 50 mesh sieve of granulation, old 24 hours.Batch mixing adopts mould compressing.
(3) sintering and hydrothermal treatment consists
Sample after shaping was placed in air natural drying after 24 hours, was placed in chamber type electric resistance furnace and sintered, and sintering temperature is 800 DEG C, and heating rate is 5 DEG C/min, and temperature retention time is 2 hours, cools to room temperature with the furnace.The sample burnt till is placed in water heating kettle, at 130 DEG C, carry out hydrothermal treatment consists, and the hydro-thermal time is 12 hours.Treat that water heating kettle cools, take out sample and dry, obtain sorbing material.
Get 2.0g sample of sorbent, be placed in the phosphorus-containing wastewater Static Adsorption 24 hours of 50mL5mg/L, get supernatant liquor and survey phosphoric residue concentration, calculate clearance.Result shows, and sample of sorbent is 91.2% to the clearance of phosphorus.
embodiment 2
The Al/Fe mol ratio that this example utilizes nickel slag to develop for the composition of raw materials of the renewable sorbing material of waste water dephosphorization is 0.67, is converted into nickel slag and Al (OH)
3mass ratio be that every 100g nickel slag adds 26.33gAl (OH)
3.
This example utilizes the development of nickel slag for the method for the renewable sorbing material of waste water dephosphorization, and it comprises following steps:
(1) pretreatment
Nickel slag is placed in ball mill wet ball grinding 25 hours, the slurry of grinding takes out and to be placed in electric heating air blast thermostatic drying chamber 80 DEG C and to dry moisture, and then crossing 100 mesh sieves, to obtain system material for subsequent use.
(2) sample preparation
Nickel slag and the Al (OH) of 100 mesh sieves will be crossed after ball milling
3after weighing by formula (Al/Fe mol ratio 0.67, Al/Fe mass ratio 0.32), add in batch mixer and mix; Add organic water afterwards and carry out granulation, ratio is that every 100g raw material adds 5mL organic water, complete rear mistake 50 mesh sieve of granulation, old 24 hours.Batch mixing adopts mould compressing.
(3) sintering and hydrothermal treatment consists
Sample after shaping was placed in air natural drying after 24 hours, was placed in chamber type electric resistance furnace and sintered, and sintering temperature is 850 DEG C, and heating rate is 5 DEG C/min, and temperature retention time is 2 hours, cools to room temperature with the furnace.The sample burnt till is placed in water heating kettle, at 140 DEG C, carry out hydrothermal treatment consists, and the hydro-thermal time is 14 hours.Treat that water heating kettle cools, take out sample and dry, obtain sorbing material.
Get 2.0g sample of sorbent, be placed in the phosphorus-containing wastewater Static Adsorption 24 hours of 50mL5mg/L, get supernatant liquor and survey phosphoric residue concentration, calculate clearance.Result shows, and sample of sorbent is 91.8% to the clearance of phosphorus.
embodiment 3
It is 1, Al/Fe mass ratio is 0.48 that this example utilizes nickel slag to develop for the Al/Fe mol ratio of the composition of raw materials of the renewable sorbing material of waste water dephosphorization, is converted into nickel slag and Al (OH)
3mass ratio be that every 100g nickel slag adds 41.23gAl (OH)
3.
This example utilizes the development of nickel slag for the method for the renewable sorbing material of waste water dephosphorization, and it comprises following steps:
Step (1) is with embodiment 1.
(2) sample preparation
Nickel slag and the Al (OH) of 100 mesh sieves will be crossed after ball milling
3after weighing by formula (Al/Fe mol ratio 1, Al/Fe mass ratio 0.48), add in batch mixer and mix; Add organic water afterwards and carry out granulation, ratio is that every 100g raw material adds 10mL organic water, complete rear mistake 50 mesh sieve of granulation, old 24 hours.Batch mixing adopts mould compressing.
(3) sintering and hydrothermal treatment consists
Sample after shaping was placed in air natural drying after 24 hours, was placed in chamber type electric resistance furnace and sintered, and sintering temperature is 900 DEG C, and heating rate is 5 DEG C/min, and temperature retention time is 2 hours, cools to room temperature with the furnace.The sample burnt till is placed in water heating kettle, at 150 DEG C, carry out hydrothermal treatment consists, and the hydro-thermal time is 16 hours.Treat that water heating kettle cools, take out sample and dry, obtain sorbing material.
Get 2.0g sample of sorbent, be placed in the phosphorus-containing wastewater Static Adsorption 24 hours of 50mL5mg/L, get supernatant liquor and survey phosphoric residue concentration, calculate clearance.Result shows, and sample of sorbent is 95.3% to the clearance of phosphorus.
embodiment 4
It is 1.5, Al/Fe mass ratio is 0.72 that this example utilizes nickel slag to develop for the Al/Fe mol ratio of the composition of raw materials of the renewable sorbing material of waste water dephosphorization, is converted into nickel slag and Al (OH)
3mass ratio be that every 100g nickel slag adds 63.58gAl (OH)
3.
This example utilizes the development of nickel slag for the method for the renewable sorbing material of waste water dephosphorization, and it comprises following steps:
Step (1) is with embodiment 1.
(2) sample preparation
Nickel slag and the Al (OH) of 100 mesh sieves will be crossed after ball milling
3after weighing by formula (Al/Fe mol ratio 1.5, Al/Fe mass ratio 0.72), add in batch mixer and mix; Add organic water afterwards and carry out granulation, ratio is that every 100g raw material adds 8mL organic water, complete rear mistake 50 mesh sieve of granulation, old 24 hours.Batch mixing adopts mould compressing.
(3) sintering and hydrothermal treatment consists
Sample after shaping was placed in air natural drying after 24 hours, was placed in chamber type electric resistance furnace and sintered, and sintering temperature is 1000 DEG C, and heating rate is 5 DEG C/min, and temperature retention time is 2 hours, cools to room temperature with the furnace.The sample burnt till is placed in water heating kettle, at 160 DEG C, carry out hydrothermal treatment consists, and the hydro-thermal time is 18 hours.Treat that water heating kettle cools, take out sample and dry, obtain sorbing material.
Get 2.0g sample of sorbent, be placed in the phosphorus-containing wastewater Static Adsorption 24 hours of 50mL5mg/L, get supernatant liquor and survey phosphoric residue concentration, calculate clearance.Result shows, and sample of sorbent is 92.2% to the clearance of phosphorus.
embodiment 5
It is 2, Al/Fe mass ratio is 0.96 that this example utilizes nickel slag to develop for the Al/Fe mol ratio of the composition of raw materials of the renewable sorbing material of waste water dephosphorization, is converted into nickel slag and Al (OH)
3mass ratio be that every 100g nickel slag adds 85.93gAl (OH)
3.
This example utilizes the development of nickel slag for the method for the renewable sorbing material of waste water dephosphorization, and it comprises following steps:
Step (1) is with embodiment 1.
(2) sample preparation
Nickel slag and the Al (OH) of 100 mesh sieves will be crossed after ball milling
3after weighing by formula (Al/Fe mol ratio 2, Al/Fe mass ratio 0.96), add in batch mixer and mix; Add organic water afterwards and carry out granulation, ratio is that every 100g raw material adds 9mL organic water, complete rear mistake 50 mesh sieve of granulation, old 24 hours.Batch mixing adopts mould compressing.
(3) sintering and hydrothermal treatment consists
Sample after shaping was placed in air natural drying after 24 hours, was placed in chamber type electric resistance furnace and sintered, and sintering temperature is 1100 DEG C, and heating rate is 5 DEG C/min, and temperature retention time is 2 hours, cools to room temperature with the furnace.The sample burnt till is placed in water heating kettle, at 180 DEG C, carry out hydrothermal treatment consists, and the hydro-thermal time is 20 hours.Treat that water heating kettle cools, take out sample and dry, obtain sorbing material.
Get 2.0g sample of sorbent, be placed in the phosphorus-containing wastewater Static Adsorption 24 hours of 50mL5mg/L, get supernatant liquor and survey phosphoric residue concentration, calculate clearance.Result shows, and sample of sorbent is 91.5% to the clearance of phosphorus.
embodiment 6
It is 0.5, Al/Fe mass ratio is 0.24 that this example utilizes nickel slag to develop for the Al/Fe mol ratio of the composition of raw materials of the renewable sorbing material of waste water dephosphorization, is converted into nickel slag and Al (OH)
3mass ratio be that every 100g nickel slag adds 18.92gAl (OH)
3.
This example utilizes the development of nickel slag for the method for the renewable sorbing material of waste water dephosphorization, and it comprises following steps:
Step (1) is with embodiment 1.
(2) sample preparation
Nickel slag and the Al (OH) of 100 mesh sieves will be crossed after ball milling
3after weighing by formula (Al/Fe mol ratio 0.5, Al/Fe mass ratio 0.24), add in batch mixer and mix; Add organic water afterwards and carry out granulation, ratio is that every 100g raw material adds 10mL organic water, complete rear mistake 50 mesh sieve of granulation, old 24 hours.Batch mixing adopts mould compressing.
(3) sintering and hydrothermal treatment consists
Sample after shaping was placed in air natural drying after 24 hours, was placed in chamber type electric resistance furnace and sintered, and sintering temperature is 900 DEG C, and heating rate is 5 DEG C/min, and temperature retention time is 2 hours, cools to room temperature with the furnace.The sample burnt till is placed in water heating kettle, at 130 DEG C, carry out hydrothermal treatment consists, and the hydro-thermal time is 12 hours.Treat that water heating kettle cools, take out sample and dry, obtain sorbing material.
Get 2.0g sample of sorbent, be placed in the phosphorus-containing wastewater Static Adsorption 24 hours of 50mL5mg/L, get supernatant liquor and survey phosphoric residue concentration, calculate clearance.Result shows, and sample of sorbent is 92.7% to the clearance of phosphorus.
embodiment 7
It is 0.5, Al/Fe mass ratio is 0.24 that this example utilizes nickel slag to develop for the Al/Fe mol ratio of the composition of raw materials of the renewable sorbing material of waste water dephosphorization, is converted into nickel slag and Al (OH)
3mass ratio be that every 100g nickel slag adds 18.92gAl (OH)
3.
This example utilizes the development of nickel slag for the method for the renewable sorbing material of waste water dephosphorization, and it comprises following steps:
Step (1) is with embodiment 1.
(2) sample preparation
Nickel slag and the Al (OH) of 100 mesh sieves will be crossed after ball milling
3after weighing by formula (Al/Fe mol ratio 0.5, Al/Fe mass ratio 0.24), add in batch mixer and mix; Add organic water afterwards and carry out granulation, ratio is that every 100g raw material adds 7mL organic water, complete rear mistake 50 mesh sieve of granulation, old 24 hours.Batch mixing adopts mould compressing.
(3) sintering and hydrothermal treatment consists
Sample after shaping was placed in air natural drying after 24 hours, was placed in chamber type electric resistance furnace and sintered, and sintering temperature is 900 DEG C, and heating rate is 5 DEG C/min, and temperature retention time is 2 hours, cools to room temperature with the furnace.The sample burnt till is placed in water heating kettle, at 140 DEG C, carry out hydrothermal treatment consists, and the hydro-thermal time is 12 hours.Treat that water heating kettle cools, take out sample and dry, obtain sorbing material.
Get 2.0g sample of sorbent, be placed in the phosphorus-containing wastewater Static Adsorption 24 hours of 50mL5mg/L, get supernatant liquor and survey phosphoric residue concentration, calculate clearance.Result shows, and sample of sorbent is 93.1% to the clearance of phosphorus.
embodiment 8
It is 0.5, Al/Fe mass ratio is 0.24 that this example utilizes nickel slag to develop for the Al/Fe mol ratio of the composition of raw materials of the renewable sorbing material of waste water dephosphorization, is converted into nickel slag and Al (OH)
3mass ratio be that every 100g nickel slag adds 18.92gAl (OH)
3.
This example utilizes the development of nickel slag for the method for the renewable sorbing material of waste water dephosphorization, and it comprises following steps:
Step (1) is with embodiment 1.
(2) sample preparation
Nickel slag and the Al (OH) of 100 mesh sieves will be crossed after ball milling
3after weighing by formula (Al/Fe mol ratio 0.5, Al/Fe mass ratio 0.24), add in batch mixer and mix; Add organic water afterwards and carry out granulation, ratio is that every 100g raw material adds 9mL organic water, complete rear mistake 50 mesh sieve of granulation, old 24 hours.Batch mixing adopts mould compressing.
(3) sintering and hydrothermal treatment consists
Sample after shaping was placed in air natural drying after 24 hours, was placed in chamber type electric resistance furnace and sintered, and sintering temperature is 900 DEG C, and heating rate is 5 DEG C/min, and temperature retention time is 2 hours, cools to room temperature with the furnace.The sample burnt till is placed in water heating kettle, at 140 DEG C, carry out hydrothermal treatment consists, and the hydro-thermal time is 18 hours.Treat that water heating kettle cools, take out sample and dry, obtain sorbing material.
Get 2.0g sample of sorbent, be placed in the phosphorus-containing wastewater Static Adsorption 24 hours of 50mL5mg/L, get supernatant liquor and survey phosphoric residue concentration, calculate clearance.Result shows, and sample of sorbent is 92.4% to the clearance of phosphorus.
embodiment 9
It is 1, Al/Fe mass ratio is 0.48 that this example utilizes nickel slag to develop for the Al/Fe mol ratio of the composition of raw materials of the renewable sorbing material of waste water dephosphorization, is converted into nickel slag and Al (OH)
3mass ratio be that every 100g nickel slag adds 41.23gAl (OH)
3.
This example utilizes the development of nickel slag for the method for the renewable sorbing material of waste water dephosphorization, and it comprises following steps:
Step (1) is with embodiment 1.
(2) sample preparation
Nickel slag and the Al (OH) of 100 mesh sieves will be crossed after ball milling
3after weighing by formula (Al/Fe mol ratio 1, Al/Fe mass ratio 0.48), add in batch mixer and mix; Add organic water afterwards and carry out granulation, ratio is that every 100g raw material adds 10mL organic water, complete rear mistake 50 mesh sieve of granulation, old 24 hours.Batch mixing adopts mould compressing.
(3) sintering and hydrothermal treatment consists
Sample after shaping was placed in air natural drying after 24 hours, was placed in chamber type electric resistance furnace and sintered, and sintering temperature is 900 DEG C, and heating rate is 5 DEG C/min, and temperature retention time is 2 hours, cools to room temperature with the furnace.The sample burnt till is placed in water heating kettle, at 140 DEG C, carry out hydrothermal treatment consists, and the hydro-thermal time is 18 hours.Treat that water heating kettle cools, take out sample and dry, obtain sorbing material.
Get 2.0g sample of sorbent, be placed in the phosphorus-containing wastewater Static Adsorption 24 hours of 50mL5mg/L, get supernatant liquor and survey phosphoric residue concentration, calculate clearance.Result shows, and sample of sorbent is 95.9% to the clearance of phosphorus.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (4)
1. for a nickel slag sorbing material for treatment of Phosphorus Containing Waste Water, it is characterized in that: raw material comprises nickel slag and Al (OH)
3; Described nickel slag is the solid slag produced in metallic nickel and nickel alloy smelting process, and its main component is: SiO
230 ~ 50wt%, Fe
2o
330 ~ 60wt%, CaO1.5 ~ 5wt%, MgO1 ~ 15wt%, Al
2o
32.5 ~ 6wt%, NiO3 ~ 6wt%; In raw material, Al/Fe mol ratio is 0.5 ~ 2.
2. prepare as claimed in claim 1 for a method for the nickel slag sorbing material for the treatment of of Phosphorus Containing Waste Water, it is characterized in that: with nickel slag, Al (OH)
3for raw material, through pretreatment, compressing, sintering and hydrothermal treatment consists, obtained renewable nickel slag sorbing material.
3. the preparation method of the nickel slag sorbing material for treatment of Phosphorus Containing Waste Water according to claim 2, is characterized in that: concrete steps are:
(1) pretreatment: nickel slag is placed in ball mill wet ball grinding 18 ~ 25 hours, the slurry of grinding takes out and is placed on 80 ~ 120 DEG C of oven dry moisture in electric heating air blast thermostatic drying chamber, then crosses 100 mesh sieves and obtains system material;
(2) compressing: the system material obtained by step (1) and Al (OH)
3be 0.5 ~ 2 add in batch mixer and mix rear obtained batch mixing by Al/Fe mol ratio; Add organic water and carry out granulation, mistake 50 mesh sieve after granulation completes, old 24 hours; Batch mixing is compressing;
(3) sintering and hydrothermal treatment consists: the sample after shaping was placed in air natural drying after 24 hours, is placed in chamber type electric resistance furnace and sinters, then cool to room temperature with the furnace; The sample burnt till is placed in water heating kettle, at 130 ~ 180 DEG C, carry out hydrothermal treatment consists, and the hydro-thermal time is 12 ~ 20 hours; Treat that water heating kettle cools, sample is dried, obtained nickel slag sorbing material;
Organic water described in step (2) is the polyvinyl alcohol water solution of volume fraction 20%; Every 100g batch mixing adds 5 ~ 10mL organic water.
4. the preparation method of the nickel slag sorbing material for treatment of Phosphorus Containing Waste Water according to claim 3, is characterized in that: its temperature of sintering described in step (3) is 800 ~ 1100 DEG C, and heating rate is 5 DEG C/min, and temperature retention time is 2 hours.
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