CN107188681A - A kind of modified attapulgite slow release chemical fertilizer and preparation method - Google Patents
A kind of modified attapulgite slow release chemical fertilizer and preparation method Download PDFInfo
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- CN107188681A CN107188681A CN201710419377.4A CN201710419377A CN107188681A CN 107188681 A CN107188681 A CN 107188681A CN 201710419377 A CN201710419377 A CN 201710419377A CN 107188681 A CN107188681 A CN 107188681A
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- chemical fertilizer
- attapulgite
- slow release
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D5/00—Fertilisers containing magnesium
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
Abstract
The invention belongs to chemical fertilizer manufacturing technology field there is provided a kind of modified attapulgite slow release chemical fertilizer and preparation method, the modified attapulgite slow release chemical fertilizer includes the following raw material：68 75 parts of chemical fertilizer, 10 25 parts of modified attapulgite clay, 6 17 parts of binding agent.Modified attapulgite, chemical fertilizer and binding agent are weighed in proportion and got the raw materials ready；Chemical fertilizer is impregnated to 0.5 10min in a binder, and stirred, after be placed on screen cloth and drain redundant adhesive；The chemical fertilizer for speckling with binding agent is uniformly rolled in modified attapulgite, bonds, obtains coating；By step（3）Gained coating dries in atmosphere, obtains the slow release chemical fertilizer of modified attapulgite cladding.Concave convex rod is used as the coating of slow release chemical fertilizer by the present invention, can strengthen the saturating fertile ability of chemical fertilizer, increase acquisition time, and attapulgite source is wide in addition, cheap, is adapted to vigorously promote the use.
Description
Technical field
The invention belongs to chemical fertilizer manufacturing technology field, in particular it relates to a kind of modified attapulgite slow release chemical fertilizer and preparation side
Method.
Background technology
Slow release chemical fertilizer meets environmental protection and the requirement of agricultural sustainable development, is the developing direction of world agriculture chemical fertilizer,
Slow-release or control-release fertilizer, which has, once to be applied, the characteristics of discharge for a long time, can accomplish one season crop only need single-dose application, saved peasant's
Fertilising and management cost, along with the reduction of fertilizers input amount, slow-release or control-release fertilizer is applied cost and also greatly reduced.Its
Middle coating type sustained-release chemical fertilizer is the main flow of slow release chemical fertilizer from now on.
Kind on coating type sustained-release chemical fertilizer is more, such as cladding rosin, sulphur, silicon, diatomite and bentonite, etc..But
Because technique is complicated compared with common fertilizer, fertile ability is weak costly, thoroughly for used coated fertilizer, and acquisition time is short, promote by
Certain obstruction.
Need a kind of fertile ability of research and development by force, acquisition time is long, cheap, the simple slow release chemical fertilizer of technique.
Attapulgite refers to a kind of clay mineral that attapulgite (attapulgite) is key component, attapulgite
Alumina magnesia silicate is hydrated for a kind of crystalloid, the layer chain structure feature with uniqueness, nanoscale hole passage microtexture,
There are the features such as specific surface area big, mesoporous material, adhesion, adsorptivity of duct development.Use it for slow release chemical fertilizer coating film
Prepare, with good application value.
The content of the invention
For defect of the prior art, on the one hand the purpose of the present invention is to provide a kind of modified attapulgite slow release chemical fertilizer,
On the one hand a kind of method for preparing the modified attapulgite slow release chemical fertilizer is also provided.
Concave convex rod is used as the coating of slow release chemical fertilizer by the present invention, can strengthen the saturating fertile ability of chemical fertilizer, increase acquisition time,
Other attapulgite source is wide, cheap, is adapted to vigorously promote the use.
Modified attapulgite slow release chemical fertilizer preparation technology of the present invention is simple, easy to operate, the modified attapulgite sustained releaseization prepared
Fertile quality better, fertilizer ability is strong thoroughly, and acquisition time is long.
A kind of modified attapulgite slow release chemical fertilizer provided according to an aspect of the present invention, the modified attapulgite slow release chemical fertilizer bag
Include the raw material of following parts by weight：
68-75 parts of chemical fertilizer,
10-25 parts of modified attapulgite clay,
6-17 parts of binding agent.
Preferably, the modified attapulgite slow release chemical fertilizer includes the raw material of following parts by weight：
69-75 parts of chemical fertilizer,
14-25 parts of modified attapulgite clay,
9-17 parts of binding agent.
Preferably, the modified attapulgite slow release chemical fertilizer includes the raw material of following parts by weight：
71 parts of chemical fertilizer,
16 parts of modified attapulgite clay,
12 parts of binding agent.
Preferably, the method for modifying of the attapulgite is as follows：
Step（1）：Take attapulgite to crush, be crushed to granular size for 20-30 mesh, the attapulgite after crushing is added to matter
Measure in the clear water for 10-12 times of attapulgite quality, stir, after immersion 10-15 hour, centrifugal treating by filtering, is done
The dry first finished product for obtaining attapulgite；
Step（2）：The first finished product of described attapulgite is put into the sodium chloride solution that concentration is 2.5-3.0%, and carried out
Stirring and heating, described mixing speed is 260-300r/min, and described heating-up temperature remains 60-85 DEG C；
Step（3）：By step（2）The attapulgite of gained obtains modified concave convex rod by filtering, dry and pulverization process
Soil.
Preferably, the step（1）Centrifugal treating 10-21min, the rotating speed of the centrifuge is 1500-1600r/min.
Preferably, the sodium chloride solution quality is the 10-25% of the first final product quality of attapulgite.
Preferably, the chemical fertilizer is the one or more in phosphate fertilizer, quick-acting phosphate fertilizer, phosphorous Chemical Mixed Fertilizer.
Preferably, the binding agent is one or more mixtures in epoxy resin, furfural resin and plant oil resin.
On the one hand a kind of preparation method of the modified attapulgite slow release chemical fertilizer provided, the modified attapulgite slow release chemical fertilizer
Preparation method comprises the following steps：
Step（1）：Modified attapulgite, chemical fertilizer and binding agent are weighed in proportion and got the raw materials ready；
Step（2）：Chemical fertilizer is impregnated into 0.5-10min in a binder, and stirred, after be placed on screen cloth and drain redundant adhesive；
Step（3）：The chemical fertilizer for speckling with binding agent is uniformly rolled in modified attapulgite, bonds, obtains coating；
Step（4）：By step（3）Gained coating dries in atmosphere, obtains the slow release chemical fertilizer of modified attapulgite cladding.
Compared with prior art, the present invention has following beneficial effect：
（1）The present invention is changing using one or more mixtures in epoxy resin, furfural resin and plant oil resin as bonding agent
Fertile outer layer single or multiple lift coating modification concave convex rod, obtains the coating fertilizer structure for integument by modified attapulgite.The coating
1 hour quick extraction nutrients accumulation release rate is 20%-26%, 24 hours quick extraction nutrients accumulation release rates at 100 DEG C of chemical fertilizer
25%-35%, 28 days nutrients accumulation release rates are 20%-40% at 25 DEG C.Due to modified attapulgite have higher specific surface area and
Abundant micropore, plays the role of regulation and control input to the moisture and fertilizer solution in soil and exports, thus sustained release performance is good；
（2）The modification of attapulgite of the present invention will crush, immersion and centrifugation etc. operation fully combine, degree of grinding,
The selection of the parameter such as soak time and centrifugal rotational speed and specific step greatly enhance the purity of attapulgite, and
Attapulgite purification and modified required time are shortened, good basis is provided for follow-up modification；With modified progress
Stirring and heating operation are provided with, and during stirring, sodium chloride is added while stirring, is carried using the principle of chemical reaction
The high modification liveness of attapulgite so that the modification of attapulgite is more thorough, and modified attapulgite adhesion is strong,
Adsorptivity is strong, and micropore increases, not easy disintegrating；
（3）Modified attapulgite slow release chemical fertilizer preparation technology of the present invention is simple, easy to operate, the modified attapulgite slow release chemical fertilizer prepared
Quality better, fertilizer ability is strong thoroughly, and acquisition time is long.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention.
Concave convex rod is used as the coating of slow release chemical fertilizer by the present invention, can strengthen the saturating fertile ability of chemical fertilizer, increase acquisition time,
Other attapulgite source is wide, cheap, is adapted to vigorously promote the use.
Modified attapulgite slow release chemical fertilizer preparation technology of the present invention is simple, easy to operate, the modified attapulgite sustained releaseization prepared
Fertile quality better, fertilizer ability is strong thoroughly, and acquisition time is long.
A kind of modified attapulgite slow release chemical fertilizer provided according to an aspect of the present invention, the modified attapulgite slow release chemical fertilizer bag
Include the raw material of following parts by weight：
68-75 parts of chemical fertilizer,
10-25 parts of modified attapulgite clay,
6-17 parts of binding agent.
Preferably, the modified attapulgite slow release chemical fertilizer includes the raw material of following parts by weight：
69-75 parts of chemical fertilizer,
14-25 parts of modified attapulgite clay,
9-17 parts of binding agent.
Preferably, the modified attapulgite slow release chemical fertilizer includes the raw material of following parts by weight：
71 parts of chemical fertilizer,
16 parts of modified attapulgite clay,
12 parts of binding agent.
Preferably, the method for modifying of the attapulgite is as follows：
Step（1）：Take attapulgite to crush, be crushed to granular size for 20-30 mesh, the attapulgite after crushing is added to matter
Measure in the clear water for 10-12 times of attapulgite quality, stir, after immersion 10-15 hour, centrifugal treating by filtering, is done
The dry first finished product for obtaining attapulgite；
Step（2）：The first finished product of described attapulgite is put into the sodium chloride solution that concentration is 2.5-3.0%, and carried out
Stirring and heating, described mixing speed is 260-300r/min, and described heating-up temperature remains 60-85 DEG C；
Step（3）：By step（2）The attapulgite of gained obtains modified concave convex rod by filtering, dry and pulverization process
Soil.
Preferably, the step（1）Centrifugal treating 10-21min, the rotating speed of the centrifuge is 1500-1600r/min.
Preferably, the sodium chloride solution quality is the 10-25% of the first final product quality of attapulgite.
Preferably, the chemical fertilizer is the one or more in phosphate fertilizer, quick-acting phosphate fertilizer, phosphorous Chemical Mixed Fertilizer.
Preferably, the binding agent is one or more mixtures in epoxy resin, furfural resin and plant oil resin.
On the one hand a kind of preparation method of the modified attapulgite slow release chemical fertilizer provided, the modified attapulgite slow release chemical fertilizer
Preparation method comprises the following steps：
Step（1）：Modified attapulgite, chemical fertilizer and binding agent are weighed in proportion and got the raw materials ready；
Step（2）：Chemical fertilizer is impregnated into 0.5-10min in a binder, and stirred, after be placed on screen cloth and drain redundant adhesive；
Step（3）：The chemical fertilizer for speckling with binding agent is uniformly rolled in modified attapulgite, bonds, obtains coating；
Step（4）：By step（3）Gained coating dries in atmosphere, obtains the slow release chemical fertilizer of modified attapulgite cladding.
Compared with prior art, the present invention has following beneficial effect：
（1）The present invention is changing using one or more mixtures in epoxy resin, furfural resin and plant oil resin as bonding agent
Fertile outer layer single or multiple lift coating modification concave convex rod, obtains the coating fertilizer structure for integument by modified attapulgite.The coating
1 hour quick extraction nutrients accumulation release rate is 20%-26%, 24 hours quick extraction nutrients accumulation release rates at 100 DEG C of chemical fertilizer
25%-35%, 28 days nutrients accumulation release rates are 20%-40% at 25 DEG C.Due to modified attapulgite have higher specific surface area and
Abundant micropore, plays the role of regulation and control input to the moisture and fertilizer solution in soil and exports, thus sustained release performance is good；
（2）The modification of attapulgite of the present invention will crush, immersion and centrifugation etc. operation fully combine, degree of grinding,
The selection of the parameter such as soak time and centrifugal rotational speed and specific step greatly enhance the purity of attapulgite, and
Attapulgite purification and modified required time are shortened, good basis is provided for follow-up modification；With modified progress
Stirring and heating operation are provided with, and during stirring, sodium chloride is added while stirring, is carried using the principle of chemical reaction
The high modification liveness of attapulgite so that the modification of attapulgite is more thorough, and modified attapulgite adhesion is strong,
Adsorptivity is strong, and micropore increases, not easy disintegrating；
（3）Modified attapulgite slow release chemical fertilizer preparation technology of the present invention is simple, easy to operate, the modified attapulgite slow release chemical fertilizer prepared
Quality better, fertilizer ability is strong thoroughly, and acquisition time is long.
Embodiment 1
A kind of modified attapulgite slow release chemical fertilizer that on the one hand the present embodiment provides, the modified attapulgite slow release chemical fertilizer includes as follows
The raw material of parts by weight：
75 parts of chemical fertilizer,
10 parts of modified attapulgite clay,
17 parts of binding agent.
The method of modifying of the attapulgite is as follows：
Step（1）：Take attapulgite to crush, be crushed to granular size for 30 mesh, the attapulgite after crushing is added to quality
In the clear water of 10 times of attapulgite quality, to stir, after immersion 15 hours, centrifugal treating is recessed by filtering, being dried to obtain
The first finished product of convex rod soil；
Step（2）：The first finished product of described attapulgite is put into the sodium chloride solution that concentration is 3.0%, and be stirred
And heating, described mixing speed is 260r/min, and described heating-up temperature remains 85 DEG C；
Step（3）：By step（2）The attapulgite of gained obtains modified concave convex rod by filtering, dry and pulverization process
Soil.
The step（1）Centrifugal treating 21min, the rotating speed of the centrifuge is 1500r/min.
The sodium chloride solution quality is the 25% of the first final product quality of attapulgite.
The chemical fertilizer is the one or more in phosphate fertilizer, quick-acting phosphate fertilizer, phosphorous Chemical Mixed Fertilizer.
The binding agent is one or more mixtures in epoxy resin, furfural resin and plant oil resin.
On the one hand a kind of preparation method of the modified attapulgite slow release chemical fertilizer provided, the modified attapulgite slow release chemical fertilizer
Preparation method comprises the following steps：
Step（1）：Modified attapulgite, chemical fertilizer and binding agent are weighed in proportion and got the raw materials ready；
Step（2）：Chemical fertilizer is impregnated into 10min in a binder, and stirred, after be placed on screen cloth and drain redundant adhesive；
Step（3）：The chemical fertilizer for speckling with binding agent is uniformly rolled in modified attapulgite, bonds, obtains coating；
Step（4）：By step（3）Gained coating dries in atmosphere, obtains the slow release chemical fertilizer of modified attapulgite cladding.
Embodiment 2
A kind of modified attapulgite slow release chemical fertilizer that on the one hand the present embodiment provides, the modified attapulgite slow release chemical fertilizer includes as follows
The raw material of parts by weight：
68 parts of chemical fertilizer,
25 parts of modified attapulgite clay,
6 parts of binding agent.
The method of modifying of the attapulgite is as follows：
Step（1）：Take attapulgite to crush, be crushed to granular size for 20 mesh, the attapulgite after crushing is added to quality
In the clear water of 12 times of attapulgite quality, to stir, after immersion 10 hours, centrifugal treating is recessed by filtering, being dried to obtain
The first finished product of convex rod soil；
Step（2）：The first finished product of described attapulgite is put into the sodium chloride solution that concentration is 2.5%, and be stirred
And heating, described mixing speed is 300r/min, and described heating-up temperature remains 60 DEG C；
Step（3）：By step（2）The attapulgite of gained obtains modified concave convex rod by filtering, dry and pulverization process
Soil.
The step（1）Centrifugal treating 10min, the rotating speed of the centrifuge is 1600r/min.
The sodium chloride solution quality is the 10% of the first final product quality of attapulgite.
The chemical fertilizer is the one or more in phosphate fertilizer, quick-acting phosphate fertilizer, phosphorous Chemical Mixed Fertilizer.
The binding agent is one or more mixtures in epoxy resin, furfural resin and plant oil resin.
On the one hand a kind of preparation method of the modified attapulgite slow release chemical fertilizer provided, the modified attapulgite slow release chemical fertilizer
Preparation method comprises the following steps：
Step（1）：Modified attapulgite, chemical fertilizer and binding agent are weighed in proportion and got the raw materials ready；
Step（2）：Chemical fertilizer is impregnated into 0.5min in a binder, and stirred, after be placed on screen cloth and drain redundant adhesive；
Step（3）：The chemical fertilizer for speckling with binding agent is uniformly rolled in modified attapulgite, bonds, obtains coating；
Step（4）：By step（3）Gained coating dries in atmosphere, obtains the slow release chemical fertilizer of modified attapulgite cladding.
Embodiment 3
A kind of modified attapulgite slow release chemical fertilizer that on the one hand the present embodiment provides, the modified attapulgite slow release chemical fertilizer includes as follows
The raw material of parts by weight：
75 parts of chemical fertilizer,
14 parts of modified attapulgite clay,
17 parts of binding agent.
The method of modifying of the attapulgite is as follows：
Step（1）：Take attapulgite to crush, be crushed to granular size for 25 mesh, the attapulgite after crushing is added to quality
In the clear water of 11 times of attapulgite quality, to stir, after immersion 12 hours, centrifugal treating is recessed by filtering, being dried to obtain
The first finished product of convex rod soil；
Step（2）：The first finished product of described attapulgite is put into the sodium chloride solution that concentration is 2.5%, and be stirred
And heating, described mixing speed is 280r/min, and described heating-up temperature remains 75 DEG C；
Step（3）：By step（2）The attapulgite of gained obtains modified concave convex rod by filtering, dry and pulverization process
Soil.
The step（1）Centrifugal treating 15min, the rotating speed of the centrifuge is 1550r/min.
The sodium chloride solution quality is the 19% of the first final product quality of attapulgite.
The chemical fertilizer is the one or more in phosphate fertilizer, quick-acting phosphate fertilizer, phosphorous Chemical Mixed Fertilizer.
The binding agent is one or more mixtures in epoxy resin, furfural resin and plant oil resin.
On the one hand a kind of preparation method of the modified attapulgite slow release chemical fertilizer provided, the modified attapulgite slow release chemical fertilizer
Preparation method comprises the following steps：
Step（1）：Modified attapulgite, chemical fertilizer and binding agent are weighed in proportion and got the raw materials ready；
Step（2）：Chemical fertilizer is impregnated into 5min in a binder, and stirred, after be placed on screen cloth and drain redundant adhesive；
Step（3）：The chemical fertilizer for speckling with binding agent is uniformly rolled in modified attapulgite, bonds, obtains coating；
Step（4）：By step（3）Gained coating dries in atmosphere, obtains the slow release chemical fertilizer of modified attapulgite cladding.
Embodiment 4
A kind of modified attapulgite slow release chemical fertilizer that on the one hand the present embodiment provides, the modified attapulgite slow release chemical fertilizer includes as follows
The raw material of parts by weight：
69 parts of chemical fertilizer,
25 parts of modified attapulgite clay,
9 parts of binding agent.
The method of modifying of the attapulgite is as follows：
Step（1）：Take attapulgite to crush, be crushed to granular size for 22 mesh, the attapulgite after crushing is added to quality
In the clear water of 11 times of attapulgite quality, to stir, after immersion 14 hours, centrifugal treating is recessed by filtering, being dried to obtain
The first finished product of convex rod soil；
Step（2）：The first finished product of described attapulgite is put into the sodium chloride solution that concentration is 2.8%, and be stirred
And heating, described mixing speed is 270r/min, and described heating-up temperature remains 75 DEG C；
Step（3）：By step（2）The attapulgite of gained obtains modified concave convex rod by filtering, dry and pulverization process
Soil.
The step（1）Centrifugal treating 10-21min, the rotating speed of the centrifuge is 1600r/min.
The sodium chloride solution quality is the 15% of the first final product quality of attapulgite.
The chemical fertilizer is the one or more in phosphate fertilizer, quick-acting phosphate fertilizer, phosphorous Chemical Mixed Fertilizer.
The binding agent is one or more mixtures in epoxy resin, furfural resin and plant oil resin.
On the one hand a kind of preparation method of the modified attapulgite slow release chemical fertilizer provided, the modified attapulgite slow release chemical fertilizer
Preparation method comprises the following steps：
Step（1）：Modified attapulgite, chemical fertilizer and binding agent are weighed in proportion and got the raw materials ready；
Step（2）：Chemical fertilizer is impregnated into 9min in a binder, and stirred, after be placed on screen cloth and drain redundant adhesive；
Step（3）：The chemical fertilizer for speckling with binding agent is uniformly rolled in modified attapulgite, bonds, obtains coating；
Step（4）：By step（3）Gained coating dries in atmosphere, obtains the slow release chemical fertilizer of modified attapulgite cladding.
Embodiment 5
A kind of modified attapulgite slow release chemical fertilizer that on the one hand the present embodiment provides, the modified attapulgite slow release chemical fertilizer includes as follows
The raw material of parts by weight：
71 parts of chemical fertilizer,
16 parts of modified attapulgite clay,
12 parts of binding agent.
The method of modifying of the attapulgite is as follows：
Step（1）：Take attapulgite to crush, be crushed to granular size for 24 mesh, the attapulgite after crushing is added to quality
In the clear water of 10 times of attapulgite quality, to stir, after immersion 10 hours, centrifugal treating is recessed by filtering, being dried to obtain
The first finished product of convex rod soil；
Step（2）：The first finished product of described attapulgite is put into the sodium chloride solution that concentration is 2.5%, and be stirred
And heating, described mixing speed is 260r/min, and described heating-up temperature remains 60 DEG C；
Step（3）：By step（2）The attapulgite of gained obtains modified concave convex rod by filtering, dry and pulverization process
Soil.
The step（1）Centrifugal treating 10min, the rotating speed of the centrifuge is 1500r/min.
The sodium chloride solution quality is the 10% of the first final product quality of attapulgite.
The chemical fertilizer is the one or more in phosphate fertilizer, quick-acting phosphate fertilizer, phosphorous Chemical Mixed Fertilizer.
The binding agent is one or more mixtures in epoxy resin, furfural resin and plant oil resin.
On the one hand a kind of preparation method of the modified attapulgite slow release chemical fertilizer provided, the modified attapulgite slow release chemical fertilizer
Preparation method comprises the following steps：
Step（1）：Modified attapulgite, chemical fertilizer and binding agent are weighed in proportion and got the raw materials ready；
Step（2）：Chemical fertilizer is impregnated into 10min in a binder, and stirred, after be placed on screen cloth and drain redundant adhesive；
Step（3）：The chemical fertilizer for speckling with binding agent is uniformly rolled in modified attapulgite, bonds, obtains coating；
Step（4）：By step（3）Gained coating dries in atmosphere, obtains the slow release chemical fertilizer of modified attapulgite cladding.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (9)
1. a kind of modified attapulgite slow release chemical fertilizer, it is characterised in that：The modified attapulgite slow release chemical fertilizer includes following parts by weight
Several raw materials：
68-75 parts of chemical fertilizer,
10-25 parts of modified attapulgite clay,
6-17 parts of binding agent.
2. modified attapulgite slow release chemical fertilizer according to claim 1, it is characterised in that：The modified attapulgite slow release chemical fertilizer
Include the raw material of following parts by weight：
69-75 parts of chemical fertilizer,
14-25 parts of modified attapulgite clay,
9-17 parts of binding agent.
3. modified attapulgite slow release chemical fertilizer according to claim 2, it is characterised in that：The modified attapulgite slow release chemical fertilizer
Include the raw material of following parts by weight：
71 parts of chemical fertilizer,
16 parts of modified attapulgite clay,
12 parts of binding agent.
4. modified attapulgite slow release chemical fertilizer according to claim 1, it is characterised in that：The method of modifying of the attapulgite
It is as follows：
Step（1）：Take attapulgite to crush, be crushed to granular size for 20-30 mesh, the attapulgite after crushing is added to matter
Measure in the clear water for 10-12 times of attapulgite quality, stir, after immersion 10-15 hour, centrifugal treating by filtering, is done
The dry first finished product for obtaining attapulgite；
Step（2）：The first finished product of described attapulgite is put into the sodium chloride solution that concentration is 2.5-3.0%, and carried out
Stirring and heating, described mixing speed is 260-300r/min, and described heating-up temperature remains 60-85 DEG C；
Step（3）：By step（2）The attapulgite of gained obtains modified concave convex rod by filtering, dry and pulverization process
Soil.
5. modified attapulgite slow release chemical fertilizer according to claim 4, it is characterised in that：The step（1）Centrifugal treating 10-
21min, the rotating speed of the centrifuge is 1500-1600r/min.
6. modified attapulgite slow release chemical fertilizer according to claim 4, it is characterised in that：The sodium chloride solution quality is recessed
The 10-25% of the first final product quality of convex rod soil.
7. modified attapulgite slow release chemical fertilizer according to claim 1, it is characterised in that：The chemical fertilizer is phosphate fertilizer, rapid available phosphorus
One or more in fertile, phosphorous Chemical Mixed Fertilizer.
8. modified attapulgite slow release chemical fertilizer according to claim 1, it is characterised in that：The binding agent be epoxy resin,
One or more mixtures in furfural resin and plant oil resin.
9. the preparation method of the modified attapulgite slow release chemical fertilizer as described in claim any one of 1-8, it is characterised in that：Including such as
Lower step：
Step（1）：Modified attapulgite, chemical fertilizer and binding agent are weighed in proportion and got the raw materials ready；
Step（2）：Chemical fertilizer is impregnated into 0.5-10min in a binder, and stirred, after be placed on screen cloth and drain redundant adhesive；
Step（3）：The chemical fertilizer for speckling with binding agent is uniformly rolled in modified attapulgite, bonds, obtains coating；
Step（4）：By step（3）Gained coating dries in atmosphere, obtains the slow release chemical fertilizer of modified attapulgite cladding.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103880550A (en) * | 2014-03-27 | 2014-06-25 | 清华大学 | Slow-release fertilizer prepared by using hollow ceramic micro-bead coating method and preparation method thereof |
| CN105016857A (en) * | 2015-06-29 | 2015-11-04 | 安徽新天地生物肥业有限公司 | Biochar slow-release base fertilizer special for sweet potatoes and preparation method thereof |
| CN105175174A (en) * | 2015-06-29 | 2015-12-23 | 安徽新天地生物肥业有限公司 | Biochar slow release base fertilizer special for wheat and preparation method thereof |
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Application publication date: 20170922 |