CN107175069A - A kind of modification infusorial earth water purification agent and preparation method thereof - Google Patents
A kind of modification infusorial earth water purification agent and preparation method thereof Download PDFInfo
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- CN107175069A CN107175069A CN201710626358.9A CN201710626358A CN107175069A CN 107175069 A CN107175069 A CN 107175069A CN 201710626358 A CN201710626358 A CN 201710626358A CN 107175069 A CN107175069 A CN 107175069A
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Abstract
The present invention relates to a kind of modification infusorial earth water purification agent and preparation method thereof, modification infusorial earth water purification agent is made up of diatomite, aluminium ash, sponge iron, ultralight clay.A kind of modification infusorial earth water purification agent of the present invention and preparation method thereof first carries out physical modification and chemical modification to diatomite, increases diatomaceous adsorbance；Aluminium ash and sponge iron are coated in modification infusorial earth particle, and sponge iron is the sponge iron for adding clay and aluminum oxide and being obtained by secondary reduction so that the modification infusorial earth water purification agent prepared is stronger to the adsorption capacity of impurity and performance is more stable；One layer of ultralight clay is coated with modification infusorial earth particle surface, plays a part of stable modification diatomaceous earth purifier performance, so that modification infusorial earth water purification agent is easy to cleaning, high recycling rate.
Description
Technical field
Prepared the present invention relates to water purification agent and applied technical field, and in particular to a kind of modification infusorial earth water purification agent and its system
Preparation Method.
Background technology
With developing rapidly for national economy, the mankind are fast to the increasingly increase of resources development and utilization activity and industrial or agricultural
Speed development, town and country all generate substantial amounts of surface water pollution, lake eutrophication outstanding problem；Underground water is by point-like or planar
Pollution, water level decreasing exacerbates the imbalance between supply and demand of water resource；The trend of ecological disruption aggravation is not yet effectively controlled.Seriously
Water pollution not only reduce the use function of water body, and exacerbate the contradiction of shortage of water resources, China implemented
The strategy of sustainable development brings serious negative effect, but also seriously threatens safe drinking water and the people of urban and rural residents
The health of the masses.Chinese is one of 13 few Ge Pin lands that abounds in rivers and lakes of water resource per capita of the world originally, and current water resource lacks problem
More obvious, the loss that water shortage is caused to the urban industry output value is more than 120,000,000,000 yuan, and in the gesture of growth.For China
Sustainable economic development, wastewater treatment is as water prevention and cure of pollution and realizes the important engineering technology hand of sustainable utilization of water resource
One of section, has important effect to protection water environment and alleviation water quality type shortage of water resources problem.
Traditional handicraft has been difficult to meet in terms of the multi-functional of processing, efficient stable and economic rationality to be improved constantly
Requirement, exploitation, research and apply new removal phosphorus in waste water technique and technology, it has also become countries in the world Water Pollution Control Engineering lead
The important topic of domain research.And the biological silicalite that diatomite is made up of the siliceous remains of diatom and other microorganisms, have
Substantial amounts of, ordered arrangement micropore, so that diatomite has very big specific surface area, meanwhile, diatomite chemical stability is high,
In addition to hydrofluoric acid is dissolved in, insoluble in any strong acid, alkali, non-secondary pollution are soluble in.The surface of natural diatom soil particle is negative in electricity
Property, it is easy to the impurity that surface is positive is removed, but it is weaker in the removal ability of the impurity of electronegativity to surface；Natural diatomaceous earth
Grain is main to reach deimpurity effect in the space of impurity absorption to diatomite particle, but excessive impurity absorption is to silicon
The recycling rate of waterused of diatomite particle can be reduced in the space of diatomaceous earth particle, the cleaning difficulty of diatomite particle is also increased.
The content of the invention
In view of the shortcomings of the prior art, simple, good purification, repeatable profit are made it is an object of the invention to provide one kind
With, be easy to a kind of modification infusorial earth water purification agent and preparation method thereof of maintenance.
What the present invention was achieved through the following technical solutions：
It is formulated and is：A kind of modification infusorial earth water purification agent, is made up of the component of following parts by weight：30~40 parts of diatomite, aluminium ash 5~
10 parts, 10~15 parts of sponge iron, 5~10 parts of ultralight clay.
Preferably, the diatomaceous particle diameter is 30 μm~40 μm.
Preferably, the percetage by weight of metallic aluminium is the 25%, weight hundred of alundum (Al2O3) in the main component of the aluminium ash
Fraction is that the percetage by weight of 35%, silica is 10%.
Preferably, the preparation method of the sponge iron is：1）By the clay of 3~5 parts by weight, the oxidation of 3~5 parts by weight
Aluminium, the iron ore of 90~100 parts by weight are well mixed, and are placed into ball mill and are milled to the mesh of 80 mesh~100, obtain compound；
2）By step 1）In mixture granulation, then by granular mixture roasting, sintering temperature is 900 DEG C~1000 DEG C, is aoxidized
Particle；3）By step 2）In oxidation particle be put into reduction furnace, be passed through carbon monoxide and reduced, obtain reduce particle；4）
Take out reduction particle and be cooled to room temperature, cooldown rate is 8 DEG C/s~10 DEG C/s；5）Reduction particle is put into reduction furnace, is passed through
Hydrogen is reduced, and obtains the sponge iron.
Preferably, the modification infusorial earth water purification agent is made up of the component of following parts by weight：35 parts of diatomite, aluminium ash 8 parts,
12 parts of sponge iron, 7 parts of ultralight clay.
Preparation method is：A kind of preparation method of modification infusorial earth water purification agent, comprises the following steps：
（1）Modification infusorial earth：Diatomite is put into the hydrochloric acid solution that mass concentration is 4mol/L~6mol/L, is 38 in temperature
DEG C~43 DEG C, mixing speed is stirring 20min~25min under conditions of 80r/min~100r/min, takes out diatomite and simultaneously washes
To neutral, diatomite is put into 3 h of freeze-day with constant temperature~5h in the baking oven that temperature is 300 DEG C~350 DEG C, the modified diatom is produced
Soil；
（2）Granulation：By step（1）In modification infusorial earth granulation, and sinter, the temperature of sintering is 800 DEG C~900 DEG C, is made
Modification infusorial earth particle；
（3）Coat aluminium ash and sponge iron：By aluminium ash, sponge iron and step（2）In modification infusorial earth particle add isopropanol in,
5 h~8h is mixed, the temperature of mixing is 70 DEG C~80 DEG C, obtain being coated with the modification infusorial earth of aluminium ash and sponge iron
Particle；
（4）Fire：By ultralight clay and step（3）In be coated with aluminium ash and the modification infusorial earth particle of sponge iron is well mixed simultaneously
Granulation, is re-sintered, and the temperature of sintering is 1000 DEG C~1200 DEG C, and the modification infusorial earth water purification agent is made.
Preferably, the step（1）It is middle to be put into diatomite in the hydrochloric acid solution that mass concentration is 5mol/L, be in temperature
40 DEG C, mixing speed takes out diatomite and is simultaneously washed to neutrality, diatomite is put into temperature to stir 22min under conditions of 90r/min
Freeze-day with constant temperature 4h in the baking oven for 320 DEG C is spent, the modification infusorial earth is produced.
Preferably, the step（2）The temperature of middle sintering is 850 DEG C.
Preferably, the step（3）It is middle by aluminium ash, sponge iron and step（2）In modification infusorial earth particle add isopropyl
In alcohol, 6h is mixed, the temperature of mixing is 75 DEG C, obtain being coated with the modification infusorial earth particle of aluminium ash and sponge iron.
Preferably, the step（4）The temperature of middle sintering is 1100 DEG C.
Ultralight clay, is one kind in paper clay, referred to as ultralight soil, mainly with high polymer material foam powder（Vacuum
Microballoon）Foamed, then be made with the material such as PVOH, crosslinking agent, glycerine, pigment according to certain ratio physical mixed.Easily
Moulding, viscosity is strong, and tensile strength is big, and it is first-class that tack can be bonded at plastics, glass, wood.Ultralight clay raw material is easily protected
Deposit, some water moisturizings, and resilient are added when quick-drying.
Sponge iron, also known as DRI, using high-quality ore, using principle of oxidation and reduction, lead to filtering type except shallow lake
Mode is excluded, and to pipeline, boiler and oxygen cycle water dissolved corrosion, water dissolved oxygen content can will arrive 0.05mg/ after water process
Below L.In rotary kiln, shaft furnace or other reactors, with coal, coke, natural gas or hydrogen make iron ore or iron ore pellets
Low-temperature reduction is carried out under conditions of less than material melting temperature, becomes cavernous product.The iron for wherein being reduced out is in
Tiny iron core, shape such as sponge.Sponge iron can remove gangue or other impurities through cooling, broken, magnetic separation.
Aluminium ash, is the product of the slag that produces after cooling processing in electrolytic aluminium or casting aluminium production technology, its mainly into
The percetage by weight for being divided into metallic aluminium is that the percetage by weight of 15%~25%, alundum (Al2O3) is 30%~35%, silica
Percetage by weight is 5%~10%, also contains calcium oxide, magnesia, iron oxide and other metal oxides in aluminium ash.Separate sources
Aluminium ash component can difference.The purposes of aluminium ash is in addition to reclaiming metallic aluminium, and it is mainly used for electric furnace smelting desulfurization.
After diatomite, the remains accumulative deposit of ancient times unicellular rudimentary plant diatom, formed by preliminary diagenesis
One kind there are porous biological silicalite.It is made up of the wall shell of diatom, there is multistage, a large amount of, orderly row on wall shell
The micropore of row, and diatomite the has characteristic such as density is small, specific surface area big, excellent adsorption, acidproof, alkaline-resisting, insulation, it is unique
Surface texture be adapted for use as sorbing material with excellent absorption property, and Chinese diatomite Resource management enriches,
It is cheap and easy to get.Diatomite is by unbodied SiO2Composition, and contain a small amount of Fe2O3、CaO、MgO、Al2O3And organic impurities.Diatom
Soil is generally in light yellow or light gray, and matter is soft, porous and light.Diatomaceous main component is silicic acid matter, with superfluorescent fiber, porous
The characteristics such as matter, go out 5000 to 6000 times more than its ultra tiny boring ratio charcoal.It is super on diatomite when humidity indoors rises
Micropore can be in automatic absorption air moisture, stored.If under the moisture reduction, humidity in room air
Drop, diatomite can just come out the water release being stored in ultra micro pore.Diatomite also has the function of eliminating peculiar smell, protects
Hold the effect of indoor cleaning.
A kind of modification infusorial earth water purification agent of the present invention and preparation method thereof, first carries out physical modification to diatomite and chemistry changes
Property, it can increase that diatomaceous specific surface area is big and aperture, specific surface area diatomaceous adsorbance increase when increasing, aperture increases
When diffusion rate of the impurity in diatomite hole accelerate, be conducive to reaching adsorption equilibrium；Play the diatomaceous adsorbance of increase and
Accelerate the effect that diatomite reaches adsorption equilibrium；Aluminium ash and sponge iron are coated in modification infusorial earth particle, aluminium ash and sponge
Iron can effectively remove the impurity that surface is in electronegativity, and modification infusorial earth can effectively remove the impurity that surface is positive, so that plus
The adsorption effect of big modification infusorial earth water purification agent, solve natural diatomaceous earth to surface in the impurity of electronegativity removal ability compared with
Weak the problem of；Sponge iron is the sponge iron for adding clay and aluminum oxide and being obtained by secondary reduction, increases sponge iron
Specific surface area and make the performance of sponge iron more stable so that adsorption capacity of the modification infusorial earth water purification agent prepared to impurity
It is stronger and performance is more stable；Ultralight clay is well mixed and made with the modification infusorial earth particle for being coated with aluminium ash and sponge iron
Grain, sintering so that modification infusorial earth particle surface is coated with one layer of ultralight clay, the presence of ultralight clay causes aluminium ash and sponge
Iron be difficult to it is backing out from modification infusorial earth particle, it is modified so as to play a part of stable modification diatomaceous earth purifier performance
During diatomaceous earth purifier adsorbing contaminant, impurity meeting Preferential adsorption is on ultralight argillic horizon, i.e., more impurity can be adsorbed in cladding
On the outer surface for the modification infusorial earth particle for aluminium ash and sponge iron, and adsorb the impurity meeting in modification infusorial earth particle voids
It is corresponding to reduce, it is possible to decrease the cleaning difficulty of diatomite particle, so that modification infusorial earth water purification agent is easy to cleaning, recycling rate of waterused
It is high.
Compared with prior art, beneficial effects of the present invention have：
1st, modification infusorial earth water purification agent performance is stable.
2nd, modification infusorial earth water purification agent high recycling rate.
3rd, the manufacture craft of modification infusorial earth water purification agent is simple, and the effect of purification is strong, it is easy to industrialized production.
Embodiment
The following examples can help those skilled in the art that the present invention is more fully understood, but cannot be with any
Mode limits the present invention.
Embodiment 1：Prepare modification infusorial earth water purification agent
It is formulated and is：A kind of modification infusorial earth water purification agent, is made up of the component of following parts by weight：Particle diameter is 30 μm of diatomite 30
Part, the percetage by weight that main component is metallic aluminium are that the percetage by weight of 25%, alundum (Al2O3) is the weight of 35%, silica
It is 10% 5 parts of aluminium ash, 10 parts of sponge iron, 5 parts of ultralight clay to measure percentage.
Preparation method is：A kind of preparation method of modification infusorial earth water purification agent, comprises the following steps：
（1）Modification infusorial earth：Diatomite is put into the hydrochloric acid solution that mass concentration is 4mol/L, is 38 DEG C in temperature, stirring
Speed takes out diatomite and is simultaneously washed to neutrality to stir 20min under conditions of 80r/min, and diatomite is put into temperature for 300 DEG C
Baking oven in the h of freeze-day with constant temperature 3, produce the modification infusorial earth；
（2）Granulation：By step（1）In modification infusorial earth granulation, and sinter, the temperature of sintering is 800 DEG C, and modified diatom is made
Soil particle；
（3）Coat aluminium ash and sponge iron：By aluminium ash, sponge iron and step（2）In modification infusorial earth particle add isopropanol in,
5 h are mixed, the temperature of mixing is 70 DEG C, obtain being coated with the modification infusorial earth particle of aluminium ash and sponge iron；
（4）Fire：By ultralight clay and step（3）In be coated with aluminium ash and the modification infusorial earth particle of sponge iron is well mixed simultaneously
Granulation, is re-sintered, and the temperature of sintering is 1000 DEG C, and the modification infusorial earth water purification agent is made.
Embodiment 2：Prepare modification infusorial earth water purification agent
It is formulated and is：A kind of modification infusorial earth water purification agent, is made up of the component of following parts by weight：Particle diameter is 40 μm of diatomite 40
Part, the percetage by weight that main component is metallic aluminium are that the percetage by weight of 25%, alundum (Al2O3) is the weight of 35%, silica
It is 10% 10 parts of aluminium ash, 15 parts of sponge iron, 10 parts of ultralight clay to measure percentage.
Preparation method is：A kind of preparation method of modification infusorial earth water purification agent, comprises the following steps：
（1）Modification infusorial earth：Diatomite is put into the hydrochloric acid solution that mass concentration is 6mol/L, is 43 DEG C in temperature, stirring
Speed takes out diatomite and is simultaneously washed to neutrality to stir 25min under conditions of 100r/min, and it is 350 that diatomite is put into temperature
DEG C baking oven in freeze-day with constant temperature 5h, produce the modification infusorial earth；
（2）Granulation：By step（1）In modification infusorial earth granulation, and sinter, the temperature of sintering is 900 DEG C, and modified diatom is made
Soil particle；
（3）Coat aluminium ash and sponge iron：By aluminium ash, sponge iron and step（2）In modification infusorial earth particle add isopropanol in,
8h is mixed, the temperature of mixing is 80 DEG C, obtain being coated with the modification infusorial earth particle of aluminium ash and sponge iron；
（4）Fire：By ultralight clay and step（3）In be coated with aluminium ash and the modification infusorial earth particle of sponge iron is well mixed simultaneously
Granulation, is re-sintered, and the temperature of sintering is 1200 DEG C, and the modification infusorial earth water purification agent is made.
Embodiment 3：Prepare modification infusorial earth water purification agent
It is formulated and is：A kind of modification infusorial earth water purification agent, is made up of the component of following parts by weight：Particle diameter is 35 μm of diatomite 35
Part, the percetage by weight that main component is metallic aluminium are that the percetage by weight of 25%, alundum (Al2O3) is the weight of 35%, silica
It is 10% 8 parts of aluminium ash, 12 parts of sponge iron, 7 parts of ultralight clay to measure percentage.
Preparation method is：A kind of preparation method of modification infusorial earth water purification agent, comprises the following steps：
（1）Modification infusorial earth：Diatomite is put into the hydrochloric acid solution that mass concentration is 5mol/L, is 40 DEG C in temperature, stirring
Speed takes out diatomite and is simultaneously washed to neutrality to stir 22min under conditions of 90r/min, and diatomite is put into temperature for 320 DEG C
Baking oven in freeze-day with constant temperature 4h, produce the modification infusorial earth；
（2）Granulation：By step（1）In modification infusorial earth granulation, and sinter, the temperature of sintering is 850 DEG C, and modified diatom is made
Soil particle；
（3）Coat aluminium ash and sponge iron：By aluminium ash, sponge iron and step（2）In modification infusorial earth particle add isopropanol in,
6h is mixed, the temperature of mixing is 75 DEG C, obtain being coated with the modification infusorial earth particle of aluminium ash and sponge iron；
（4）Fire：By ultralight clay and step（3）In be coated with aluminium ash and the modification infusorial earth particle of sponge iron is well mixed simultaneously
Granulation, is re-sintered, and the temperature of sintering is 1100 DEG C, and the modification infusorial earth water purification agent is made.
Embodiment 4：Prepare modification infusorial earth water purification agent
It is formulated and is：A kind of modification infusorial earth water purification agent, is made up of the component of following parts by weight：Particle diameter is 37 μm of diatomite 33
Part, the percetage by weight that main component is metallic aluminium are that the percetage by weight of 25%, alundum (Al2O3) is the weight of 35%, silica
It is 10% 6 parts of aluminium ash, 11 parts of sponge iron, 8 parts of ultralight clay to measure percentage.
Preparation method is：A kind of preparation method of modification infusorial earth water purification agent, comprises the following steps：
（1）Modification infusorial earth：Diatomite is put into the hydrochloric acid solution that mass concentration is 4.4mol/L, is 39 DEG C in temperature, stirs
Mix speed to stir 24min under conditions of 95r/min, take out diatomite and be washed to neutrality, it is 310 that diatomite is put into temperature
DEG C baking oven in freeze-day with constant temperature 3.5h, produce the modification infusorial earth；
（2）Granulation：By step（1）In modification infusorial earth granulation, and sinter, the temperature of sintering is 880 DEG C, and modified diatom is made
Soil particle；
（3）Coat aluminium ash and sponge iron：By aluminium ash, sponge iron and step（2）In modification infusorial earth particle add isopropanol in,
7h is mixed, the temperature of mixing is 77 DEG C, obtain being coated with the modification infusorial earth particle of aluminium ash and sponge iron；
（4）Fire：By ultralight clay and step（3）In be coated with aluminium ash and the modification infusorial earth particle of sponge iron is well mixed simultaneously
Granulation, is re-sintered, and the temperature of sintering is 1180 DEG C, and the modification infusorial earth water purification agent is made.
Embodiment 5：Prepare modification infusorial earth water purification agent
It is formulated and is：A kind of modification infusorial earth water purification agent, is made up of the component of following parts by weight：Particle diameter is 35 μm of diatomite 35
Part, the percetage by weight that main component is metallic aluminium are that the percetage by weight of 25%, alundum (Al2O3) is the weight of 35%, silica
It is 10% 8 parts of aluminium ash, 12 parts of sponge iron, 7 parts of ultralight clay to measure percentage.
Preparation method is：A kind of preparation method of modification infusorial earth water purification agent, comprises the following steps：
（1）Granulation：Diatomite is pelletized, and sintered, the temperature of sintering is 850 DEG C, and diatomite particle is made；
（2）Coat aluminium ash and sponge iron：Aluminium ash, sponge iron and diatomite particle are added in isopropanol, 6h, mixing is mixed
The temperature of stirring is 75 DEG C, obtains being coated with the diatomite particle of aluminium ash and sponge iron；
（3）Fire：By ultralight clay and step（3）In be coated with aluminium ash and the diatomite particle of sponge iron is well mixed and made
Grain, is re-sintered, and the temperature of sintering is 1100 DEG C, and the modification infusorial earth water purification agent is made.
Comparative example 1：Prepare modification infusorial earth water purification agent
It is formulated and is：A kind of modification infusorial earth water purification agent, is made up of the component of following parts by weight：Particle diameter is 35 μm of diatomite 35
Part, the percetage by weight that main component is metallic aluminium are that the percetage by weight of 25%, alundum (Al2O3) is the weight of 35%, silica
It is 10% aluminium grey 8 parts, 12 parts of sponge iron to measure percentage.
Preparation method is：A kind of preparation method of modification infusorial earth water purification agent, comprises the following steps：
（1）Modification infusorial earth：Diatomite is put into the hydrochloric acid solution that mass concentration is 5mol/L, is 40 DEG C in temperature, stirring
Speed takes out diatomite and is simultaneously washed to neutrality to stir 22min under conditions of 90r/min, and diatomite is put into temperature for 320 DEG C
Baking oven in freeze-day with constant temperature 4h, produce the modification infusorial earth；
（2）Granulation：By step（1）In modification infusorial earth granulation, and sinter, the temperature of sintering is 850 DEG C, and modified diatom is made
Soil particle；
（3）Coat aluminium ash and sponge iron：By aluminium ash, sponge iron and step（2）In modification infusorial earth particle add isopropanol in,
6h is mixed, the temperature of mixing is 75 DEG C, and the modification infusorial earth water purification agent is made.
Table 1 below provides the performance measurement result of modification infusorial earth water purification agent made from embodiment 1-5 and comparative example 1.
Table 1
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Comparative example 1 |
| Calcium ion adsorption rate/（%） | 92.7 | 90.9 | 95.7 | 90.5 | 88.4 | 88.6 |
| Magnesium ion adsorption rate/（%） | 95.2 | 94.4 | 96.0 | 93.7 | 86.0 | 87.2 |
| Water purification agent cleans difficulty | Easily clean | Easily clean | Easily clean | Easily clean | Easily clean | It is easy to clean |
| Insoluble matter clearance/（%） | 99.7 | 99.5 | 99.9 | 99.4 | 97.0 | 99.0 |
This hair is can be seen that from the performance measurement result of modification infusorial earth water purification agent made from upper table embodiment 1-5 and comparative example 1
A kind of bright modification infusorial earth water purification agent and preparation method thereof, the effect of the modification infusorial earth water purification agent purification prepared is strong, easy
In cleaning, high recycling rate.
Although above the present invention is described in detail with a general description of the specific embodiments,
On the basis of the present invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Cause
This, these modifications or improvements, belong to the scope of protection of present invention without departing from theon the basis of the spirit of the present invention.
Claims (10)
1. a kind of modification infusorial earth water purification agent, it is characterised in that the modification infusorial earth water purification agent by following parts by weight component
Composition：30~40 parts of diatomite, 5~10 parts of aluminium ash, 10~15 parts of sponge iron, 5~10 parts of ultralight clay.
2. a kind of modification infusorial earth water purification agent according to claim 1, it is characterised in that the diatomaceous particle diameter is 30
μm~40 μm.
3. a kind of modification infusorial earth water purification agent according to claim 1, it is characterised in that the main component of the aluminium ash
In：The percetage by weight of metallic aluminium is that the percetage by weight of 25%, alundum (Al2O3) is that the percetage by weight of 35%, silica is
10%。
4. a kind of modification infusorial earth water purification agent according to claim 1, it is characterised in that the preparation method of the sponge iron
For：1）The iron ore of the clay of 3~5 parts by weight, the aluminum oxide of 3~5 parts by weight, 90~100 parts by weight is well mixed, then put
Enter to be milled to the mesh of 80 mesh~100 in ball mill, obtain compound；2）By step 1）In mixture granulation, then by granular mixing
Material roasting, sintering temperature is 900 DEG C~1000 DEG C, obtains oxidation particle；3）By step 2）In oxidation particle be put into reduction furnace
In, it is passed through carbon monoxide and is reduced, obtains reducing particle；4）Take out reduction particle and be cooled to room temperature, cooldown rate is 8 DEG C/s
~10 DEG C/s；5）Reduction particle is put into reduction furnace, hydrogen is passed through and is reduced, obtain the sponge iron.
5. a kind of modification infusorial earth water purification agent according to claim 1, it is characterised in that the modification infusorial earth water purification agent
It is made up of the component of following parts by weight：35 parts of diatomite, 8 parts of aluminium ash, 12 parts of sponge iron, 7 parts of ultralight clay.
6. a kind of preparation method of modification infusorial earth water purification agent in claim 1-5 described in any one, it is characterised in that bag
Include following steps：
（1）Modification infusorial earth：Diatomite is put into the hydrochloric acid solution that mass concentration is 4mol/L~6mol/L, is 38 in temperature
DEG C~43 DEG C, mixing speed is stirring 20min~25min under conditions of 80r/min~100r/min, takes out diatomite and simultaneously washes
To neutral, diatomite is put into 3 h of freeze-day with constant temperature~5h in the baking oven that temperature is 300 DEG C~350 DEG C, the modified diatom is produced
Soil；
（2）Granulation：By step（1）In modification infusorial earth granulation, and sinter, the temperature of sintering is 800 DEG C~900 DEG C, is made
Modification infusorial earth particle；
（3）Coat aluminium ash and sponge iron：By aluminium ash, sponge iron and step（2）In modification infusorial earth particle add isopropanol in,
5 h~8h is mixed, the temperature of mixing is 70 DEG C~80 DEG C, obtain being coated with the modification infusorial earth of aluminium ash and sponge iron
Particle；
（4）Fire：By ultralight clay and step（3）In be coated with aluminium ash and the modification infusorial earth particle of sponge iron is well mixed simultaneously
Granulation, is re-sintered, and the temperature of sintering is 1000 DEG C~1200 DEG C, and the modification infusorial earth water purification agent is made.
7. a kind of preparation method of modification infusorial earth water purification agent according to claim 6, it is characterised in that the step
（1）It is middle to be put into diatomite in the hydrochloric acid solution that mass concentration is 5mol/L, it is 40 DEG C in temperature, mixing speed is 90r/min
Under conditions of stir 22min, take out diatomite and be simultaneously washed to neutrality, diatomite is put into constant temperature in the baking oven that temperature is 320 DEG C
4h is dried, the modification infusorial earth is produced.
8. a kind of preparation method of modification infusorial earth water purification agent according to claim 6, it is characterised in that the step
（2）The temperature of middle sintering is 850 DEG C.
9. a kind of preparation method of modification infusorial earth water purification agent according to claim 6, it is characterised in that the step
（3）It is middle by aluminium ash, sponge iron and step（2）In modification infusorial earth particle add isopropanol in, mix 6h, mix
Temperature be 75 DEG C, obtain being coated with the modification infusorial earth particle of aluminium ash and sponge iron.
10. a kind of preparation method of modification infusorial earth water purification agent according to claim 6, it is characterised in that the step
（4）The temperature of middle sintering is 1100 DEG C.
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