CN108751280A - A kind of solid iron magnesium composite dephosphorizing agent and preparation method thereof - Google Patents
A kind of solid iron magnesium composite dephosphorizing agent and preparation method thereof Download PDFInfo
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- CN108751280A CN108751280A CN201810577140.3A CN201810577140A CN108751280A CN 108751280 A CN108751280 A CN 108751280A CN 201810577140 A CN201810577140 A CN 201810577140A CN 108751280 A CN108751280 A CN 108751280A
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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
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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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
Abstract
The present invention relates to dephosphorization agent field, a kind of solid iron magnesium composite dephosphorizing agent and preparation method thereof is provided.The solid iron magnesium composite dephosphorizing agent, raw material is counted in parts by weight includes：5~50 parts of 300~400 parts of bodied ferric sulfate, 60~90 parts of the concentrated sulfuric acid and magnesium-containing compound.Solid iron magnesium composite dephosphorizing agent provided in an embodiment of the present invention, by in acid condition, the intermediate products that magnesium-containing compound makes are introduced into bodied ferric sulfate is solidified into porous solid rapidly, eliminate dry link, it utmostly ensure that the structural form of bodied ferric sulfate is not destroyed, convenient for packaging, transport.In addition, the preparation method of solid iron magnesium composite dephosphorizing agent provided in an embodiment of the present invention, the preparation method is simple, reaction condition is mild, easy to implement, solid iron magnesium composite dephosphorizing agent obtained, without drying, natural cooling is i.e. curable, significantly reduces dry required cost and equipment investment, and energy conservation and consumption reduction effects are notable.
Description
Technical field
The present invention relates to dephosphorization agent fields, in particular to a kind of solid iron magnesium composite dephosphorizing agent and preparation method thereof.
Background technology
Existing dephosphorization agent PFS is in mainly liquid form, to obtain solid dephosphorization agent SPFS, mainly uses following technique：
One-step method：The method principle is first then ferrous sulfate to be adjusted it at ferric subsulfate through nitric acid oxidation by sulfuric acid
Basicity.Specific implementation process is：Using ferrous sulfate as primary raw material, intermediate production is obtained to terminal through dust technology normal temperature oxidation
Object, then in the presence of telomerization curing agent, be passed through sulfuric acid solution catalytic polymerization and obtain bodied ferric sulfate, then aged, crushing packing
It gets product.
Liquid PFS boulton process：The method principle is so that the boiling point of water is reduced thus at a lower temperature i.e. using vacuum
Can evaporable water, while the vacuum bubble that makes liquid evaporation vapor be formed quickly vanishes and accelerates the efficiency of moisture evaporation.Tool
Body realizes that process is：Liquid PFS is first made, is dried under reduced pressure liquid at a temperature of about 60 DEG C, about 3h is solid
PFS。
As can be seen from above, one-step method prepare solid dephosphorization agent method energy consumption it is relatively high, have the shortcomings that insoluble matter, vacuum
Although dry method product quality is stablized, its equipment investment and pressure regulating equipment energy consumption are relatively high.
Invention content
The purpose of the present invention is to provide a kind of solid iron magnesium composite dephosphorizing agents, are not necessarily to drying, and natural cooling can be consolidated
Change, significantly reduce dry required cost and equipment investment, energy conservation and consumption reduction effects are notable.
Another object of the present invention is to provide a kind of preparation method of solid iron magnesium composite dephosphorizing agent, preparation method letters
Single, reaction condition is mild, easy to implement, solid iron magnesium composite dephosphorizing agent obtained, is not necessarily to drying, and natural cooling is i.e. curable,
Dry required cost and equipment investment are significantly reduced, energy conservation and consumption reduction effects are notable.
What the embodiment of the present invention was realized in：
A kind of solid iron magnesium composite dephosphorizing agent, raw material is counted in parts by weight includes：It is 300~400 parts of bodied ferric sulfate, dense
5~50 parts of 60~90 parts of sulfuric acid and magnesium-containing compound.
A kind of preparation method of solid iron magnesium composite dephosphorizing agent comprising：Under the conditions of the concentrated sulfuric acid of 60~90 parts by weight,
The magnesium-containing compound of 5~50 parts by weight is added into the bodied ferric sulfate of 300~400 parts by weight, postcooling is completed in reaction.
The advantageous effect of the embodiment of the present invention for example including：
Solid iron magnesium composite dephosphorizing agent provided in an embodiment of the present invention, by acid condition, into bodied ferric sulfate
It introduces the intermediate products that magnesium-containing compound makes and is solidified into porous solid rapidly, eliminate dry link, utmostly ensure
The structural form of bodied ferric sulfate is not destroyed that (dry destructible polyaluminum sulfate Iron activiation, causes the generation of insoluble matter, no
Molten object is mainly ferriferous oxide), convenient for packaging, transport, in addition, the addition of magnesium-containing compound also has the effect of removing ammonia nitrogen.
In addition, the preparation method of solid iron magnesium composite dephosphorizing agent provided in an embodiment of the present invention, the preparation method is simple, instead
Mild condition is answered, easy to implement, solid iron magnesium composite dephosphorizing agent obtained is not necessarily to drying, and natural cooling is i.e. curable, greatly
Dry required cost and equipment investment are reduced, energy conservation and consumption reduction effects are notable.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the solid iron magnesium composite dephosphorizing agent that provides of the embodiment of the present invention 1 in preparation process, after the completion of material
State diagram；
Fig. 2 is the solid iron magnesium composite dephosphorizing agent that provides of the embodiment of the present invention 1 in preparation process, and product is placed 6 hours
State diagram afterwards；
Fig. 3 is the embodiment of the present invention；The 1 solid iron magnesium composite dephosphorizing agent provided is in preparation process, product completion of cure
State diagram afterwards.
Specific implementation mode
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will
Understand, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.It is not specified in embodiment specific
Condition person carries out according to conventional conditions or manufacturer's recommended conditions.Reagents or instruments used without specified manufacturer is
The conventional products that can be obtained by commercially available purchase.
Solid iron magnesium composite dephosphorizing agent of the embodiment of the present invention and preparation method thereof is specifically described below.
A kind of solid iron magnesium composite dephosphorizing agent, raw material is counted in parts by weight includes：It is 300~400 parts of bodied ferric sulfate, dense
5~50 parts of 60~90 parts of sulfuric acid and magnesium-containing compound.
Preferably, raw material is counted in parts by weight includes：350~400 parts of bodied ferric sulfate, 70~80 parts of the concentrated sulfuric acid and contain
15~40 parts of magnesium compound.
Wherein, the molecular formula of bodied ferric sulfate is [Fe2(OH)n(SO4)3-n/2]m, it is a kind of inorganic high score of superior performance
Sub- flocculant, morphological characters are faint yellow unformed powdery solids, are highly soluble in water, the aqueous solution of 10wt% is that rufous is transparent
Solution, hygroscopicity.Bodied ferric sulfate has excellent purifying water effect, is used as dephosphorization agent.
Bodied ferric sulfate can also can independently be prepared by commercially available purchase.The preparation of bodied ferric sulfate (PFS) mainly has
Direct oxidation method and catalytic oxidation.In the present embodiment, preferred polymeric ferric sulfate is independently to be prepared, it is easier to control polymerization
The content of iron in ferric sulfate.Through inventor the study found that the concentration of the bodied ferric sulfate of commercially available purchase is about 10% or so, concentration
Relatively low, finished product obtained is not easy to cure, and the content by controlling iron in bodied ferric sulfate accounts for the 10 of the quality of bodied ferric sulfate
~20%, such as：10%, 12%, 14%, 16%, 18%, 20% etc..For iron content within the scope of this, finished product obtained is solid
Change is easier, and phosphor-removing effect is more preferably.The content of iron accounts for 14~20% effects of the quality of bodied ferric sulfate wherein in bodied ferric sulfate
Fruit is more preferably.In addition, the concentrated sulfuric acid is added directly as raw material in the bodied ferric sulfate of commercially available purchase, part of hydroxyl structure can be destroyed,
Manufactured finished product quality defect.When bodied ferric sulfate is using autonomous prepare, generated using ferrous sulfate and oxidant reaction
When bodied ferric sulfate, due to needing that the excessive concentrated sulfuric acid is added during the reaction, after completion of the reaction, without being separately separated polymerization
Magnesium-containing compound is directly added in ferric sulfate into system, and bodied ferric sulfate keeps stable state, hydroxyl structure not to be broken at this time
Bad, finished product quality is more preferably.
Specifically, bodied ferric sulfate is to aoxidize system via oxidized dose of direct oxidation of ferrous sulfate or through catalyst
?.
Direct oxidation method：H2O2、HNO3, the oxidants such as chlorate ferrous (such as ferrous sulfate) oxidation is prepared into PFS.The party
Method production PFS is simple for process, and (rapid reaction) with short production cycle, stability is preferable.
It is found through inventor's comparative study, in above-mentioned three kinds of oxidants, H2O2Method prepares PFS since exothermic heat of reaction makes H2O2
It decomposes, causes oxidant utilization low while reducing the effective concentration of PFS, keep preparation high concentration product more difficult；HNO3
Method can prepare the product of high concentration, but the technique can discharge pollution environmental gas NO2, it is necessary to it is absorbed by device；Chlorate process
The product of higher concentration can be prepared, but its product has Cl-With ClO3 -Residual but do not influence product use.
Catalytic oxidation：O2Or air oxidant prepares PFS under the action of catalyst.This method oxidization time is longer,
Production efficiency is relatively low, and catalyst amount is larger, and product hydrolysis degree is not high, while its technique can discharge nitrogen-containing oxide, needs to fill
Set absorption.
Based on the studies above, in the present embodiment, preferred polymeric ferric sulfate is via oxidized dose of direct oxidation of ferrous sulfate
It is made, more specifically, oxidant is preferably sodium chlorate.
When bodied ferric sulfate is made via oxidized dose of direct oxidation of ferrous sulfate, solid iron magnesium composite dephosphorizing agent
Raw material is counted to correspond in parts by weight and be replaced with：350~450 parts of ferrous sulfate, 10~30 parts of oxidant, 60~90 parts of the concentrated sulfuric acid
And 5~50 parts of magnesium-containing compound.
Preferably, the raw material of solid iron magnesium composite dephosphorizing agent is calculated by weight as：360~420 parts of ferrous sulfate, oxidation
15~40 parts of 15~25 parts of agent, 70~80 parts of the concentrated sulfuric acid and magnesium-containing compound.
Ferrous sulfate is industrial waste, and the cost for purchasing ferrous sulfate can be ignored substantially, makes full use of industrial pair
Product, and industrial waste can be consumed, solve productivity effect.Polyaluminum sulfate is being generated using ferrous sulfate and oxidant reaction
When iron, due to needing that the excessive concentrated sulfuric acid is added during the reaction, after completion of the reaction, without being separately separated bodied ferric sulfate,
Magnesium-containing compound is directly added into system, bodied ferric sulfate keeps stable state, hydroxyl structure not to be destroyed at this time.
Further, the raw material of the solid iron magnesium composite dephosphorizing agent in the embodiment of the present invention is counted can also wrap in parts by weight
Include 1~50 part of water, it is preferable that water is 15~30 parts.The addition of water is conducive to that the concentrated sulfuric acid, ferrous sulfate is made to be uniformly dispersed.
Magnesium-containing compound is magnesia or magnesium carbonate, and the concentrated sulfuric acid provides acid condition, while and magnesium-containing compound for system
(magnesia or magnesium carbonate) reaction production magnesium sulfate, exothermic heat of reaction evaporation section moisture, while generating gas makes liquid in foaming
Shape, it is to be added it is complete after, liquid is released, cooling and standings make magnesium sulfate crystallize the free moisture that contains in consumable liquid so that should
Liquid can rapid curing, while state of its foaming makes to be in puffy after solidification.Reaction mechanism is as follows：
MgO+H2SO4=MgSO4+H2O, heat release, system heating, the magnesium sulfate of generation do not crystallize
MgCO3+H2SO4=MgSO4+H2O+CO2↑, the magnesium sulfate of heat release, generation does not crystallize, discharges gas；
MgSO4+7H2O=MgSO4·7H2O, cooling, magnesium sulfate crystallization.
(magnesium carbonate can be folded into magnesia) is calculated by magnesia, the quality per 1g magnesia consumption free waters is：1/
40.3044 × (6 × 18.01524)=2.6819g, after free water is reduced, liquid can gradual spontaneous curing.
The magnesium-containing compound introduced simultaneously has certain removal to act on ammonia nitrogen, and removal amount depends primarily on handled liquid
The concentration of orthophosphates, principle are as follows：
Mg2++HPO4 2-+NH4 ++6H2O→MgNH4PO4·6H2O↓+H+
Mg2++PO4 3-+NH4 ++6H2O→MgNH4PO4·6H2O↓
Mg2++H2PO4 2-+NH4 ++6H2O→MgNH4PO4·6H2O↓+2H+
In the embodiment of the present invention, by introducing magnesium-containing compound, make itself and strong sulfuric acid response, it is excessive dense in consumption system
Sulfuric acid, magnesium-containing compound and strong sulfuric acid response heat release, evaporation section moisture, while the magnesium sulfate generated can react knot with water
Crystalline substance, and then free water is consumed, make liquid rapid curing.
In addition, the embodiment of the present invention additionally provides a kind of preparation method of solid iron magnesium composite dephosphorizing agent comprising 10
Under the conditions of the concentrated sulfuric acid of~40 parts by weight, 1~20 parts by weight are added into the bodied ferric sulfate of 20~80 parts by weight contains magnesium
Object is closed, postcooling is completed in reaction.
Specifically, bodied ferric sulfate is first prepared：Ferrous sulfate is made with oxidized react of oxidant.Principle is as follows：
6FeSO4+NaClO3+3(1-n/2)H2SO4→3[Fe2(OH)n(SO4)3-n/2]+3(1-n)H2O+NaCl
Wherein, NaClO3As oxidant, certainly, in other embodiments, hydrogen peroxide or nitric acid can also be selected to make
For oxidant, no longer illustrate one by one here.
In the present embodiment, bodied ferric sulfate is directly preferably prepared under the conditions of the concentrated sulfuric acid with ferrous sulfate and oxidant, is had
Body, the concentrated sulfuric acid, ferrous sulfate are proportionally added into reaction kettle, at normal temperatures, oxidant is added in stirring, and oxidant is always added
Time continues 1~2h, and being slowly added to be conducive to of oxidant keeps suitable reaction speed, reaction evenly, until will be ferrous
Oxidation is complete, after the completion of oxidant is added, is stirred to react 1~3h, exothermic heat of reaction evaporation section moisture.Again slowly into kettle
Magnesium-containing compound is added, material is all moved into cooler after stirring 1h, 10~36h of cooling and standings obtains loose frangible consolidate
Body obtains solid compound iron magnesium dephosphorization agent through being simply granulated, being packaged.
During magnesium-containing compound is added, magnesium-containing compound consumption sulfuric acid simultaneously generates magnesium sulfate, exothermic heat of reaction evaporation part
Point moisture, while generating gas makes liquid in foaming shape, it is to be added it is complete after, liquid is released, cooling and standings make magnesium sulfate crystallize
The free moisture contained in consumable liquid so that the liquid can rapid curing, while state of its foaming makes after solidification in fluffy
Shape.
It may be noted that when the concentrated sulfuric acid and ferrous sulfate are proportionally added into reaction kettle, it is also an option that property first to reaction
Water is added in kettle, opens stirring, is then slowly added into the concentrated sulfuric acid and ferrous sulfate into reaction kettle again, the addition of water is conducive to
The concentrated sulfuric acid and ferrous sulfate are uniformly mixed.
Next, by being carried out to the characteristic of solid iron magnesium composite dephosphorizing agent provided in an embodiment of the present invention and preparation method thereof
It further illustrates.
Embodiment 1
The raw material of solid iron magnesium composite dephosphorizing agent provided in this embodiment, solid iron magnesium composite dephosphorizing agent includes：Water 30g,
Concentrated sulfuric acid 75g, ferrous sulfate heptahydrate 360g, sodium chlorate 21g, magnesia 15g.
Preparation method is as follows：It is put into water into reaction kettle, opens stirring, is under agitation slowly put into the concentrated sulfuric acid
In acid-resistant reacting kettle, it is subsequently added into bodied ferric sulfate, continues to stir, is slow added into sodium chlorate, sodium chlorate is always added the time and exists
In 2h, after the completion of addition, it is stirred to react 2h, is slow added into magnesia, stirs and material is all moved into cooler after 1h, it is cooling
It stands 10~36h and obtains solid iron magnesium composite dephosphorizing agent.
Embodiment 2
Solid iron magnesium composite dephosphorizing agent provided in this embodiment, preparation method is same as Example 1, and distinctive points are：
In the present embodiment, the raw material of solid iron magnesium composite dephosphorizing agent includes：Water 30g, concentrated sulfuric acid 75g, ferrous sulfate heptahydrate 360g, chloric acid
Sodium 21g, magnesium carbonate 30g.
Embodiment 3
Solid iron magnesium composite dephosphorizing agent provided in this embodiment, preparation method is same as Example 1, and distinctive points are：
In the present embodiment, the raw material of solid iron magnesium composite dephosphorizing agent includes：Water 30g, concentrated sulfuric acid 75g, ferrous sulfate heptahydrate 360g, chloric acid
Sodium 21g, magnesia 23g.
Embodiment 4
Solid iron magnesium composite dephosphorizing agent provided in this embodiment, preparation method is same as Example 1, and distinctive points are：
In the present embodiment, the raw material of solid iron magnesium composite dephosphorizing agent includes：Water 50g, concentrated sulfuric acid 90g, ferrous sulfate heptahydrate 450g, chloric acid
Sodium 30g, magnesia 50g.
Embodiment 5
Solid iron magnesium composite dephosphorizing agent provided in this embodiment, preparation method is same as Example 1, and distinctive points are：
In the present embodiment, the raw material of solid iron magnesium composite dephosphorizing agent includes：Water 1g, concentrated sulfuric acid 60g, ferrous sulfate heptahydrate 350g, chloric acid
Sodium 10g, magnesia 5g.
Embodiment 6
The solid iron magnesium composite dephosphorizing agent that the present embodiment is provided with embodiment 1 and preparation method thereof roughly the same, distinctive points
It is：Oxidant is sodium chlorate in embodiment 1, and oxidant is hydrogen peroxide in the present embodiment.
Embodiment 7
The solid iron magnesium composite dephosphorizing agent that the present embodiment is provided with embodiment 1 and preparation method thereof roughly the same, distinctive points
It is：Oxidant is sodium chlorate in embodiment 1, and oxidant is nitric acid in the present embodiment.
Embodiment 8
A kind of solid iron magnesium composite dephosphorizing agent is present embodiments provided, directly uses bodied ferric sulfate for raw material system
Standby, specifically, raw material includes：Bodied ferric sulfate 300g, concentrated sulfuric acid 60g, magnesia 20g.
Preparation method is as follows：Slowly the concentrated sulfuric acid is put into acid-resistant reacting kettle under agitation, is subsequently added into polymerization
Ferric sulfate continues to stir, addition magnesia, material is all moved to cooler after stirring 1h, 10~36h of cooling and standings is consolidated
Body iron magnesium composite dephosphorizing agent.
Embodiment 9
Solid iron magnesium composite dephosphorizing agent provided in this embodiment, preparation method is same as Example 8, and distinctive points are：
In the present embodiment, the raw material of solid iron magnesium composite dephosphorizing agent includes：Bodied ferric sulfate 400g, concentrated sulfuric acid 90g, magnesia 50g.
Embodiment 10
Solid iron magnesium composite dephosphorizing agent provided in this embodiment, preparation method is same as Example 8, and distinctive points are：
In the present embodiment, the raw material of solid iron magnesium composite dephosphorizing agent includes：Bodied ferric sulfate 350g, concentrated sulfuric acid 75g, magnesia 30g.
Comparative example
The raw material of the solid iron magnesium composite dephosphorizing agent provided according to embodiment 1 prepares solid iron magnesium composite dephosphorizing agent, with biography
The PFS of system compares.
As can be seen from above, the solid iron magnesium composite dephosphorizing agent phosphor-removing effect and common liq dephosphorization agent no significant difference, but
Solid iron magnesium composite dephosphorizing agent provided in this embodiment can rapid curing, eliminate dry link, significantly reduce drying
Required cost and equipment investment, energy conservation and consumption reduction effects are notable.It please refers to Fig.1, Fig. 2 and Fig. 3, wherein Fig. 1 is that material is complete
State diagram after, at this point, product is in a liquid state；Fig. 2 is the state diagram after product is placed 6 hours, at this point, product gradually starts
Solidification；Fig. 3 is the state diagram of product after curing completely, and product is in fluffy, frangible.Solid iron magnesium composite dephosphorizing agent after solidification
Dephosphorization is convenient for packaging, transport.
In conclusion solid iron magnesium composite dephosphorizing agent provided in an embodiment of the present invention, by acid condition, to polymerization
Introduce magnesium-containing compound in ferric sulfate, make itself and strong sulfuric acid response, the excessive concentrated sulfuric acid in consumption system, magnesium-containing compound with it is dense
Sulfuric acid reaction heat release, evaporation section moisture, while generate magnesium sulfate can with water reactive crystallization, and then consume free water, make
Liquid rapid curing eliminates dry link at porous solid, utmostly ensure that the structural form of bodied ferric sulfate not by
It destroys (dry destructible polyaluminum sulfate Iron activiation, it is mainly ferriferous oxide to cause the generation of insoluble matter, insoluble matter).Convenient for packet
Dress, transport, in addition, magnesium also has the effect of removing ammonia nitrogen.
In addition, the preparation method of solid iron magnesium composite dephosphorizing agent provided in an embodiment of the present invention, the preparation method is simple, instead
Mild condition is answered, easy to implement, solid iron magnesium composite dephosphorizing agent obtained is not necessarily to drying, and natural cooling is i.e. curable, greatly
Dry required cost and equipment investment are reduced, energy conservation and consumption reduction effects are notable.
It these are only the preferred embodiment of the present invention, be not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.Any modification made by all within the spirits and principles of the present invention,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of solid iron magnesium composite dephosphorizing agent, which is characterized in that its raw material is counted in parts by weight includes：Bodied ferric sulfate 300
5~50 parts of~400 parts, 60~90 parts of the concentrated sulfuric acid and magnesium-containing compound.
2. solid iron magnesium composite dephosphorizing agent according to claim 1, which is characterized in that the raw material counts packet in parts by weight
It includes：15~40 parts of 350~400 parts of the bodied ferric sulfate, 70~80 parts of the concentrated sulfuric acid and the magnesium-containing compound.
3. solid iron magnesium composite dephosphorizing agent according to claim 1, which is characterized in that the raw material is counted also in parts by weight
Including：1~50 part of water, it is preferable that 5~30 parts of the water.
4. solid iron magnesium composite dephosphorizing agent according to claim 1, which is characterized in that the bodied ferric sulfate is via sulphur
The oxidized dose of direct oxidation of sour ferrous iron aoxidizes obtained through catalyst.
5. solid iron magnesium composite dephosphorizing agent according to claim 4, which is characterized in that iron content in the bodied ferric sulfate
Account for the 10~20% of the quality of the bodied ferric sulfate.
6. solid iron magnesium composite dephosphorizing agent according to claim 4, which is characterized in that the oxidant is selected from peroxidating
It is one or more in hydrogen, sodium chlorate, potassium chlorate, nitric acid, it is preferable that the oxidant is sodium chlorate.
7. according to Claims 1 to 5 any one of them solid iron magnesium composite dephosphorizing agent, which is characterized in that the chemical combination containing magnesium
Object is magnesia or magnesium carbonate.
8. a kind of preparation method of solid iron magnesium composite dephosphorizing agent, which is characterized in that it includes：In the dense sulphur of 60~90 parts by weight
Under the conditions of acid, the magnesium-containing compound of 5~50 parts by weight is added into the bodied ferric sulfate of 300~400 parts by weight, after the completion of reaction
It is cooling.
9. the preparation method of solid iron magnesium composite dephosphorizing agent according to claim 8, which is characterized in that further include described poly-
Close the preparation of ferric sulfate：By ferrous sulfate and oxidant it is oxidized react or aoxidized through catalyst be made.
10. the preparation method of solid iron magnesium composite dephosphorizing agent according to claim 9, which is characterized in that in the oxidation
In reaction process, the addition time of the oxidant continues 1~2h.
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| CN1772642A (en) * | 2005-09-27 | 2006-05-17 | 暨南大学 | Production process of solid composite ferric sulfate polymer |
| CN101544407A (en) * | 2008-03-24 | 2009-09-30 | 中南大学 | Method for preparing solid polyferric sulfate by swelling and solidifying methods |
| CN104480308A (en) * | 2015-01-02 | 2015-04-01 | 重庆大学 | Dephosphorizing method for acid vanadium leached solution |
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