CN111233558A - Potassium magnesium sulfate fertilizer and preparation method thereof - Google Patents
Potassium magnesium sulfate fertilizer and preparation method thereof Download PDFInfo
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- CN111233558A CN111233558A CN202010267017.9A CN202010267017A CN111233558A CN 111233558 A CN111233558 A CN 111233558A CN 202010267017 A CN202010267017 A CN 202010267017A CN 111233558 A CN111233558 A CN 111233558A
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- magnesium
- potassium
- magnesium oxide
- polyvinyl alcohol
- potash
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D1/00—Fertilisers containing potassium
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- 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
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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Fertilizers (AREA)
Abstract
The invention relates to a potash magnesium sulphate fertilizer and a preparation method thereof, and the potash magnesium sulphate fertilizer is characterized by consisting of potash magnesium sulphate and magnesium oxide.
Description
Technical Field
The invention relates to a potash magnesium sulphate fertilizer and a preparation method thereof.
Background
The natural magnesium potassium sulfate has poor viscosity and high water absorption, and in order to not influence the content of magnesium potassium sulfate, the traditional preparation method of the magnesium potassium sulfate granular fertilizer adopts a roller extrusion mode for granulation, but has the problems of low granular strength, easy pulverization and easy caking in the storage process, thereby bringing troubles to the use and popularization of the magnesium potassium sulfate.
The natural magnesium potassium sulfate is granulated by a roller to prepare round particles, however, clay is required to be added to prepare round particles, in order to achieve higher one-time granulation rate, the amount of the added clay is usually over 10%, so that the content of S, K, Mg in the magnesium potassium sulfate is seriously reduced, and more amount of the clay is required to be added when the effect of extruding and granulating the magnesium potassium sulfate, so that the trouble is brought to users. Meanwhile, due to low content, the compatibility of the fertilizer with other fertilizers is limited, and only a formula with low S, K, Mg content can be prepared, so that the use is inconvenient and the popularization is difficult.
Some manufacturers try to replace clay with polyvinyl alcohol with higher viscosity, however, when the concentration of the used polyvinyl alcohol exceeds 4%, the polyvinyl alcohol is affected by potassium magnesium sulfate, the polyvinyl alcohol is separated out from the solution, and cannot be well dispersed during production, so that local aggregation is caused, and the production shows that large balls are generated, the yield is extremely low, and the production cannot be carried out; when the concentration of the used polyvinyl alcohol is lower than 3%, the viscosity is too low, the balling rate is low, the yield is extremely low, and the production is not suitable.
The market needs a potash magnesium sulphate fertilizer which has high content, is not easy to pulverize, agglomerate and use and popularize.
Disclosure of Invention
The invention aims to solve the technical problem of providing a potash magnesium sulphate fertilizer and a preparation method thereof.
In order to solve the technical problems, the invention adopts the following technical scheme:
a potash magnesium sulphate fertilizer is composed of potassium magnesium sulphate and magnesium oxide.
Also included are polyvinyl alcohols.
The mass ratio of the potassium magnesium sulfate to the magnesium oxide to the polyvinyl alcohol is 98-99.7: 0.3-1: 0-1.
A preparation method of a potash magnesium sulphate fertilizer comprises the following steps:
metering: weighing potassium magnesium sulfate and magnesium oxide according to a certain mass ratio;
conveying: conveying potassium magnesium sulfate and magnesium oxide into a storage bin;
adding water or steam: adding hot water or steam into the mixture of potassium magnesium sulfate and magnesium oxide, and uniformly mixing;
and (3) granulation: and (4) extruding and granulating.
A preparation method of a potash magnesium sulphate fertilizer comprises the following steps:
metering: weighing potassium magnesium sulfate and magnesium oxide according to a certain mass ratio;
conveying: conveying the potassium magnesium sulfate and the magnesium oxide into a granulation roller;
polyvinyl alcohol addition polymerization: heating 1-3% of polyvinyl alcohol aqueous solution, and spraying the heated polyvinyl alcohol aqueous solution on a mixture of potassium magnesium sulfate and magnesium oxide;
and (3) granulation: carrying out roller granulation;
and (5) drying.
The hot water temperature is 80-100 ℃, the water vapor pressure is 0.4-0.6 Mpa, and the adding amount of water or steam is 1-3% of the total amount of the magnesium potassium sulfate and the magnesium oxide; the heating temperature of the polyvinyl alcohol aqueous solution is 80-100 ℃, and the adding amount of the polyvinyl alcohol aqueous solution is 6-10% of the total amount of the potassium magnesium sulfate and the magnesium oxide.
The steam adding position is positioned at the feeding bin of the potassium magnesium sulfate and the magnesium oxide, and the polyvinyl alcohol aqueous solution adding position is positioned at the feeding bin of the potassium magnesium sulfate and the magnesium oxide.
The invention has the following beneficial technical effects:
1. the potash magnesium sulphate fertilizer prepared by the method is high in content, not easy to pulverize, not easy to agglomerate, and easy to use and popularize.
2. According to the method, the clay is omitted, the particles can be formed, and the product has a good anti-caking effect.
Detailed Description
The present invention is further illustrated by the following specific examples.
Example 1
A potash magnesium sulphate fertilizer is composed of potassium magnesium sulphate and magnesium oxide.
The mass ratio of the potassium magnesium sulfate to the magnesium oxide is 99.5: 0.5.
A method for preparing a potash magnesium sulphate fertilizer,
metering: weighing potassium magnesium sulfate and magnesium oxide according to a certain mass ratio;
conveying: conveying potassium magnesium sulfate and magnesium oxide into a storage bin;
adding steam: adding steam into the mixture of the potassium magnesium sulfate and the magnesium oxide, and uniformly mixing, wherein the addition amount of the steam accounts for 2% of the mixture of the potassium magnesium sulfate and the magnesium oxide;
and (3) granulation: and (4) extruding and granulating.
The steam pressure was 0.45 MPa.
The steam is added at the feed bin of the potassium magnesium sulfate and magnesium oxide.
Example 2
A potash magnesium sulphate fertilizer consists of potassium magnesium sulphate, magnesium oxide and polyvinyl alcohol.
The mass ratio of the potassium magnesium sulfate to the magnesium oxide to the polyvinyl alcohol is 98.9:0.5: 0.6.
A method for preparing a potash magnesium sulphate fertilizer,
metering: weighing potassium magnesium sulfate and magnesium oxide according to a certain mass ratio;
conveying: conveying the potassium magnesium sulfate and the magnesium oxide into a granulation roller;
polyvinyl alcohol addition polymerization: heating a 2% polyvinyl alcohol aqueous solution, and spraying the polyvinyl alcohol aqueous solution on a mixed material of potassium magnesium sulfate and magnesium oxide, wherein the adding amount of the polyvinyl alcohol aqueous solution accounts for 7% of the mixture of the potassium magnesium sulfate and the magnesium oxide;
and (3) granulation: carrying out roller granulation;
and (5) drying.
The polyvinyl alcohol heating temperature was 90 ℃.
The addition position of the polyvinyl alcohol aqueous solution is positioned at the position of the potassium magnesium sulfate and the magnesium oxide entering the granulation roller.
Example 3
A potash magnesium sulphate fertilizer is composed of potassium magnesium sulphate and magnesium oxide.
The mass ratio of the potassium magnesium sulfate to the magnesium oxide is 99: 1.
A method for preparing a potash magnesium sulphate fertilizer,
metering: weighing potassium magnesium sulfate and magnesium oxide according to a certain mass ratio;
conveying: conveying potassium magnesium sulfate and magnesium oxide into a storage bin;
adding steam: adding steam into the mixture of the potassium magnesium sulfate and the magnesium oxide, and uniformly mixing, wherein the addition amount of the steam accounts for 1.5 percent of the mixture of the potassium magnesium sulfate and the magnesium oxide;
and (3) granulation: and (4) extruding and granulating.
The steam pressure was 0.5 MPa.
The steam is added at the feed bin of the potassium magnesium sulfate and magnesium oxide.
Example 4
A potash magnesium sulphate fertilizer consists of potassium magnesium sulphate, magnesium oxide and polyvinyl alcohol.
The mass ratio of the potassium magnesium sulfate to the magnesium oxide to the polyvinyl alcohol is 99:0.6: 0.4.
A method for preparing a potash magnesium sulphate fertilizer,
metering: weighing potassium magnesium sulfate and magnesium oxide according to a certain mass ratio;
conveying: conveying the potassium magnesium sulfate and the magnesium oxide into a granulation roller;
polyvinyl alcohol addition polymerization: heating 1.5% polyvinyl alcohol aqueous solution, spraying on the mixture of potassium magnesium sulfate and magnesium oxide, wherein the addition amount of the polyvinyl alcohol aqueous solution accounts for 8% of the mixture of the potassium magnesium sulfate and the magnesium oxide;
and (3) granulation: and (4) carrying out roller granulation.
And (5) drying.
The polyvinyl alcohol heating temperature was 95 ℃.
The addition position of the polyvinyl alcohol aqueous solution is positioned at the position of the potassium magnesium sulfate and the magnesium oxide entering the granulation roller.
Example 5
A potash magnesium sulphate fertilizer is composed of potassium magnesium sulphate and magnesium oxide.
The mass ratio of the potassium magnesium sulfate to the magnesium oxide is 99.6: 0.4.
A method for preparing a potash magnesium sulphate fertilizer,
metering: weighing potassium magnesium sulfate and magnesium oxide according to a certain mass ratio;
conveying: conveying potassium magnesium sulfate and magnesium oxide into a storage bin;
adding steam: adding steam into the mixture of the potassium magnesium sulfate and the magnesium oxide, and uniformly mixing, wherein the addition amount of the steam accounts for 1.8 percent of the mixture of the potassium magnesium sulfate and the magnesium oxide;
and (3) granulation: and (4) extruding and granulating.
The steam pressure was 0.55 MPa.
The steam is added at the feed bin of the potassium magnesium sulfate and magnesium oxide.
Example 6
A potash magnesium sulphate fertilizer consists of potassium magnesium sulphate, magnesium oxide and polyvinyl alcohol.
The mass ratio of the potassium magnesium sulfate to the magnesium oxide to the polyvinyl alcohol is 98.9:0.8: 0.3.
A method for preparing a potash magnesium sulphate fertilizer,
metering: weighing potassium magnesium sulfate and magnesium oxide according to a certain mass ratio;
conveying: conveying the potassium magnesium sulfate and the magnesium oxide into a granulation roller;
polyvinyl alcohol addition polymerization: heating 1% polyvinyl alcohol aqueous solution, spraying on the mixture of potassium magnesium sulfate and magnesium oxide, wherein the addition amount of the polyvinyl alcohol aqueous solution accounts for 7% of the mixture of the potassium magnesium sulfate and the magnesium oxide;
and (3) granulation: and (4) carrying out roller granulation.
And (5) drying.
The polyvinyl alcohol was heated at 100 ℃.
The addition position of the polyvinyl alcohol aqueous solution is positioned at the position of the potassium magnesium sulfate and the magnesium oxide entering the granulation roller.
The beneficial effects of the present invention are further illustrated below in conjunction with experimental data:
experiment one
1. Experimental materials
1, materials and methods:
1.1 test site: tobacco pipe agricultural science and technology Limited.
1.2 test materials: examples 1, 2, 1 (the preparation was identical to example 1 except that no magnesium oxide was added), 2 (the preparation was identical to example 2 except that no magnesium oxide was added and the concentration of polyvinyl alcohol added was 5%) and 3 (the preparation was identical to example 2 except that no magnesium oxide was added and the concentration of polyvinyl alcohol added was 3%).
1.3, detection: the one-time balling rate (the grain size of fertilizer grains is 2.0 mm-4.75 mm, which is a qualified product), the hardness of the grains and the caking rate;
the caking rate experimental method comprises the following steps: the prepared finished products of example 1, example 2, comparative 1 (except that no magnesium oxide is added, the other preparation methods are all consistent with example 1), comparative 2 (except that no magnesium oxide is added, the concentration of the added polyvinyl alcohol is 5 percent, the other preparation methods are all consistent with example 2) and comparative 3 (except that no magnesium oxide is added, the concentration of the added polyvinyl alcohol is 3 percent, the other preparation methods are all consistent with example 2), the finished products are respectively packaged, the weight of each package is 50kg, 20 packages are taken as a group, the packages are attached to a wall, stacked for 20 times, stored for 40 days, the bottommost package is taken, the package is lifted to 1.2 meters by two persons, the hands are loosened, the front and the back are respectively thrown once, the caking rate is counted, the diameter of a sieve hole used for counting the caking rate is 2.0mm and 4.75mm, the granules screened between 2.0mm and 4.75mm are qualified products, and the granules not screened but counted as caking.
Note: example 1 and comparative 1, in which extrusion granulation was employed, did not employ an anti-caking agent; examples 2, comparative 2 (the same preparation method as in example 2 except that no magnesium oxide was added and the concentration of polyvinyl alcohol added was 5%) and comparative 3 (the same preparation method as in example 2 except that no magnesium oxide was added and the concentration of polyvinyl alcohol added was 3%) used an anti-blocking agent purchased from tin-free city sky film chemical products ltd.
The experiment was conducted in a consistent manner except for the different treatments used in the experiment.
2 results and analysis
The statistics of the primary balling rate, the particle hardness and the caking rate are shown in Table 1
TABLE 1
| First balling rate (%) | Particle hardness (N) | Caking ratio (%) | |
| Comparative example 1 | 68.5 | 16.7 | 67.4 |
| Comparative example 2 | 16.7 | 27.8 | 37.2 |
| Comparison 3 | 21.3 | 28.3 | 32.9 |
| Example 1 | 73.7 | 43.8 | 0.93 |
| Example 2 | 66.8 | 36.5 | 1.57 |
As can be seen from the above data, example 1, in which magnesium oxide was added, has advantages of high spheroidization ratio, large particle hardness, and low caking ratio, as compared with comparative example 1. As can be seen from comparison of the data of example 2, comparative example 2 and comparative example 3, example 2 in which magnesium oxide and polyvinyl alcohol were added has advantages of high one-shot granulation rate, large particle hardness, and low caking rate, as compared to comparative example 2 and comparative example 3 in which polyvinyl alcohol was added alone.
Claims (7)
1. The potash magnesium sulphate fertilizer is characterized in that: consists of magnesium potassium sulfate and magnesium oxide.
2. The potash magnesium sulphate fertilizer of claim 1, further comprising polyvinyl alcohol.
3. The potash magnesium sulphate fertilizer as claimed in claim 1, wherein the mass ratio of the potash magnesium sulphate, the magnesium oxide and the polyvinyl alcohol is 98-99.7: 0.3-1: 0-1.
4. The preparation method of the potash magnesium sulphate fertilizer is characterized by comprising the following steps of:
metering: weighing potassium magnesium sulfate and magnesium oxide according to a certain mass ratio;
conveying: conveying potassium magnesium sulfate and magnesium oxide into a storage bin;
adding water or steam: adding hot water or steam into the mixture of potassium magnesium sulfate and magnesium oxide, and uniformly mixing;
and (3) granulation: and (4) extruding and granulating.
5. A preparation method of a potash magnesium sulphate fertilizer is characterized by comprising the following steps:
metering: weighing potassium magnesium sulfate and magnesium oxide according to a certain mass ratio;
conveying: conveying the potassium magnesium sulfate and the magnesium oxide into a granulation roller;
polyvinyl alcohol addition polymerization: heating 1-3% of polyvinyl alcohol aqueous solution, and spraying the heated polyvinyl alcohol aqueous solution on a mixture of potassium magnesium sulfate and magnesium oxide;
and (3) granulation: carrying out roller granulation;
and (5) drying.
6. The method for preparing potash magnesium sulphate fertilizer as claimed in claim 4 or 5, wherein the hot water temperature is 80-100 ℃, the water vapor pressure is 0.4-0.6 Mpa, and the water or vapor addition amount is 1-3% of the total amount of potash magnesium sulphate and magnesia; the heating temperature of the polyvinyl alcohol aqueous solution is 80-100 ℃, and the adding amount of the polyvinyl alcohol aqueous solution is 6-10% of the total amount of the potassium magnesium sulfate and the magnesium oxide.
7. The method for preparing potash magnesium sulphate fertilizer as claimed in claim 4 or 5, wherein the steam feeding position is located at the feeding bin of potash magnesium sulphate and magnesium oxide, and the polyvinyl alcohol aqueous solution feeding position is located at the feeding granulation drum of potash magnesium sulphate and magnesium oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010267017.9A CN111233558B (en) | 2020-04-08 | 2020-04-08 | Potassium magnesium sulfate fertilizer and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010267017.9A CN111233558B (en) | 2020-04-08 | 2020-04-08 | Potassium magnesium sulfate fertilizer and preparation method thereof |
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| CN111233558B CN111233558B (en) | 2022-03-22 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102320867A (en) * | 2011-08-31 | 2012-01-18 | 张万里 | Sulphate-potassium magnesium fertilizer and preparation method thereof |
| CN103819271A (en) * | 2014-02-25 | 2014-05-28 | 湖北富邦科技股份有限公司 | Preparation method of novel granular potassium chloride fertilizer |
| WO2018033913A1 (en) * | 2016-08-16 | 2018-02-22 | Technion Research & Development Foundation Limited | Polyhipe-base substance-releasing systems |
-
2020
- 2020-04-08 CN CN202010267017.9A patent/CN111233558B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102320867A (en) * | 2011-08-31 | 2012-01-18 | 张万里 | Sulphate-potassium magnesium fertilizer and preparation method thereof |
| CN103819271A (en) * | 2014-02-25 | 2014-05-28 | 湖北富邦科技股份有限公司 | Preparation method of novel granular potassium chloride fertilizer |
| WO2018033913A1 (en) * | 2016-08-16 | 2018-02-22 | Technion Research & Development Foundation Limited | Polyhipe-base substance-releasing systems |
Non-Patent Citations (1)
| Title |
|---|
| 丁绪淮 等: "《工业结晶》", 31 October 1985, 化学工业出版社 * |
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Effective date of registration: 20220228 Address after: 843000 10 km textile Avenue, Aksu textile industrial city, Aksu Prefecture, Xinjiang Uygur Autonomous Region Applicant after: Xinjiang zhengyilong Agricultural Materials Co.,Ltd. Address before: 265602 room 103, building 5, municipal entrepreneurship Park, No. 163, Jinshajiang Road, Yantai Economic and Technological Development Zone, Yantai area, China (Shandong) pilot Free Trade Zone, Yantai City, Shandong Province Applicant before: Yantai Nongfeng Agricultural Technology Co.,Ltd. |
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