CN113200789A - Preparation method of multi-nutrient sustained and controlled release round particle potash fertilizer - Google Patents
Preparation method of multi-nutrient sustained and controlled release round particle potash fertilizer Download PDFInfo
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- CN113200789A CN113200789A CN202110439530.6A CN202110439530A CN113200789A CN 113200789 A CN113200789 A CN 113200789A CN 202110439530 A CN202110439530 A CN 202110439530A CN 113200789 A CN113200789 A CN 113200789A
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- nutrient
- potash fertilizer
- controlled release
- round
- sustained
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Classifications
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B17/00—Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
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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
- C05G3/30—Anti-agglomerating additives; Anti-solidifying additives
-
- 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
- C05G3/40—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting fertiliser dosage or release rate; for affecting solubility
-
- 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
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
-
- 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
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Fertilizers (AREA)
Abstract
The invention relates to a preparation method of a multi-nutrient sustained and controlled release round particle potash fertilizer, which is characterized by comprising the following steps of: (1) spraying a layer of coating liquid on the round granular potash fertilizer at the temperature of 0-80 ℃ at the front end of the coating roller, wherein the coating liquid is phosphoric acid residue liquid, and the weight percentage of phosphoric acid is 20-75%; (2) spraying a layer of nutrient powder rich in multiple nutrient elements at the middle end of the coating roller, and grinding the nutrient powder to 100-500 meshes; (3) spraying a layer of coating liquid at the tail end of the coating roller to obtain the multi-nutrient sustained and controlled release round granular potash fertilizer. The invention has the advantages that: 1. the method is simple and quick; 2. no return material exists; 3. flexibility; 4. has the anti-caking slow-release function.
Description
Technical Field
The invention relates to a preparation method of a multi-nutrient sustained and controlled release round granular potash fertilizer, belonging to the field of fertilizer manufacturing.
Background
China is a big agricultural country, and various fertilizers, especially chemical fertilizers, contribute to the safe exertion of food in China and cannot be worn out.
In the past 20 years, Chinese grains are increased year by year, but the quality of agricultural products is reduced year by year, and the total grain yield increase speed is obviously reduced in nearly 5 years, which is the reason why agricultural experts, fertilizer experts, planting experts and soil experts in China agree to cause the increase and the slowing of the yield of agricultural products, and the reason why the quality of grains is reduced is that soil nutrients are disordered, the current agriculture excessively depends on major elements of nitrogen, phosphorus and potassium, but the synergistic effect of medium trace elements on the major elements and the promotion effect of medium trace elements on the growth and metabolism of crops are ignored. Therefore, China's soil and crops need to supplement medium and trace elements urgently, and novel fertilizers such as compound fertilizers or simple substance fertilizers (urea, ammonium nitrate, phosphate fertilizers and potash fertilizers) containing the medium and trace elements are needed.
The demand of grains drives the explosive growth of chemical fertilizers in China, and in the past decade, various chemical fertilizer enterprises in China can reach more than 6000, but most of the products are traditional nitrogen, phosphorus and potassium single-substance fertilizers or compound fertilizers. The Chinese chemical fertilizer market homogenization competition and price war have the advantages that the number of small and large chemical fertilizer enterprises which are closed in last 2 years exceeds 500, and some large-scale potassium fertilizer enterprises are serious in loss and are frequently near the production edge.
The simple substance potash fertilizer has good water solubility, the potassium element can be quickly absorbed by crops, but the overall utilization rate of potassium nutrient in China is not high, and other nutrient elements are urgently needed to cooperate to achieve the effect of sustained and controlled release so as to improve the nutritional efficacy of the potash fertilizer.
Therefore, under the background, the development of a preparation method of a multi-nutrient sustained and controlled release round particle potash fertilizer becomes urgent.
Disclosure of Invention
The invention aims to provide a preparation method of a multi-nutrient sustained and controlled release round particle potash fertilizer, which can safely and quickly upgrade the traditional potash fertilizer into the sustained and controlled release potash fertilizer containing multiple nutrient elements and obviously improve the utilization efficiency of the potash fertilizer.
The technical scheme of the invention is as follows:
a preparation method of a multi-nutrient sustained and controlled release round particle potash fertilizer is characterized by comprising the following steps:
(1) spraying a layer of coating liquid on the round granular potash fertilizer at the temperature of 0-80 ℃ at the front end of the coating roller, wherein the coating liquid is phosphoric acid residue liquid, and the weight percentage of phosphoric acid is 20-75%;
(2) spraying a layer of nutrient powder rich in multiple nutrient elements at the middle end of the coating roller, and grinding the nutrient powder to 100-500 meshes.
(3) Spraying a layer of coating liquid at the tail end of the coating roller to obtain the multi-nutrient sustained and controlled release round granular potash fertilizer.
The coating liquid added at the front end of the coating roller and the tail end of the coating roller is 1-5% of round granular potash fertilizer.
The nutrient powder containing multiple nutrient elements added at the middle end of the coating roller is 1-10% of the round granular potash fertilizer.
The preparation method of the multi-nutrient element nutrition powder comprises the following steps:
the multi-nutrient element nutrition powder is prepared by uniformly mixing magnesium oxide, zinc oxide, copper oxide, ferric oxide and/or manganese oxide powder according to a certain proportion, and feeding the mixture into a micro powder vortex mill for grinding until the mesh number of the powder reaches 100-500 meshes.
The round granular potash fertilizer is prepared by drum granulation. The round granular potash fertilizer is round granular potassium sulfate or round granular potassium chloride
The invention has the advantages that:
1. the method is simple and quick, and the traditional round granular potash fertilizer can be upgraded by spraying in the existing fertilizer wrapping roller;
2. no material return. Directly entering a packaging storage system after the packaging is finished;
3. is flexible. The multi-nutrient sustained and controlled release round granular potash fertilizer containing different nutrient elements and with different contents can be prepared by adjusting the wrapping amount and different nutrient proportions;
4. has an anti-caking function, and the multi-nutrition-containing sustained and controlled release round granular potash fertilizer prepared by the method
No fertilizer anti-caking agent is required to be added;
5. the slow release function, the multi-nutrition-containing slow controlled release round particle potash fertilizer prepared by the method can realize the slow release of potassium nutrients.
Detailed Description
The invention is further described with reference to the examples, wherein the materials are in weight percent.
Example 1
Rotary drum potassium sulfate, 2% magnesium oxide and 2% zinc oxide
1) 20kg of phosphoric acid slag liquid with the weight percentage of phosphoric acid of 40 percent is sprayed on 1 ton of round granular potassium sulfate with the temperature of 40 ℃ at the front end of the coating roller.
2) 43.8 kg of 200-mesh mixed powder of magnesium oxide and zinc oxide is added to the middle end of the coating roller, wherein the weight ratio of the magnesium oxide to the zinc oxide is 1: 1.
3) Spraying 30 kilograms of phosphoric acid slag liquid at the tail end of the coating roller, wherein the weight percentage of the phosphoric acid is 40 percent, and obtaining the controlled-release round granular potassium sulfate containing 2 percent of magnesium oxide and 2 percent of zinc oxide.
100g of fertilizer is buried in 20kg of soil, 1000ml of water is added into the soil, the soil is placed in a constant temperature and humidity box, the temperature is set to be 25 ℃, and the melting speed of the fertilizer is observed when the humidity is 70 percent.
| Before enveloping/d | After enveloping/d | |
| 1 | 3 | 126 |
| 2 | 3 | 122 |
| 3 | 3 | 121 |
The slow release effect of the fertilizer after coating can be prolonged, and the fertilizer can be slowly released for 118 days.
30g of fertilizer is put into a centrifuge tube to be centrifuged for 3min at 1000r/min, and then a pressure instrument is used for testing pressure.
| before/N of envelope | post-envelope/N | |
| 1 | 87 | 61 |
| 2 | 84 | 64 |
| 3 | 79 | 57 |
Example 2
Rotating drum potassium chloride, 1% manganese oxide and 2% zinc oxide
1) 20kg of phosphoric acid slag liquid with the weight percentage of phosphoric acid of 40 percent is sprayed on 1 ton of round granular potassium chloride with the temperature of 30 ℃ at the front end of the coating roller.
2) 32.2 kg of 200-mesh mixed powder of manganese oxide and zinc oxide is added at the middle end of the coating roller, wherein the weight ratio of the manganese oxide to the zinc oxide is 1: 2.
3) Spraying 20kg of phosphoric acid slag liquid at the tail end of the coating roller, wherein the weight percentage of the phosphoric acid is 40 percent, and obtaining the controlled-release round granular potassium sulfate containing 1 percent of manganese oxide and 2 percent of zinc oxide.
100g of fertilizer is buried in 20kg of soil, 1000ml of water is added into the soil, the soil is placed in a constant temperature and humidity box, the temperature is set to be 25 ℃, and the melting speed of the fertilizer is observed when the humidity is 70 percent.
| Before enveloping/d | After enveloping/d | |
| 1 | 3 | 130 |
| 2 | 3 | 131 |
| 3 | 3 | 130 |
The slow release effect of the fertilizer after coating can be prolonged, and the fertilizer can be slowly released for 127 days.
30g of fertilizer is put into a centrifuge tube to be centrifuged for 3min at 1000r/min, and then a pressure instrument is used for testing pressure.
| before/N of envelope | post-envelope/N | |
| 1 | 79 | 56 |
| 2 | 68 | 55 |
| 3 | 74 | 52 |
Embodiment 3
Rotary drum potassium sulfate, 3% magnesium oxide, 3% zinc oxide and 3% copper oxide
1) 10 kg of phosphoric acid slag liquid with the weight percentage of phosphoric acid of 75 percent is sprayed on 1 ton of round granular potassium sulfate with the temperature of 80 ℃ at the front end of the coating roller.
2) 100 kg of 500-mesh mixed powder of magnesium oxide, zinc oxide and copper oxide is added at the middle end of the coating roller, wherein the weight ratio of the magnesium oxide to the zinc oxide to the copper oxide is 1:1: 1.
3) Spraying 10 kilograms of phosphoric acid slag liquid at the tail end of the coating roller, wherein the weight percentage of the phosphoric acid is 75 percent, and then preparing the controlled-release round granular potassium sulfate containing 3 percent of magnesium oxide, 3 percent of zinc oxide and 3 percent of copper oxide.
100g of fertilizer is buried in 20kg of soil, 1000ml of water is added into the soil, the soil is placed in a constant temperature and humidity box, the temperature is set to be 25 ℃, and the melting speed of the fertilizer is observed when the humidity is 70 percent.
| Before enveloping/d | After enveloping/d | |
| 1 | 3 | 115 |
| 2 | 3 | 123 |
| 3 | 3 | 110 |
The slow release effect of the fertilizer after coating can be prolonged, and the fertilizer can be slowly released for 107 days.
30g of fertilizer is put into a centrifuge tube to be centrifuged for 3min at 1000r/min, and then a pressure instrument is used for testing pressure.
| before/N of envelope | post-envelope/N | |
| 1 | 71 | 45 |
| 2 | 64 | 50 |
| 3 | 67 | 48 |
Example 4
Rotating drum potassium chloride, 1% of manganese oxide, 2% of zinc oxide and 2% of ferric oxide
1) At the front end of the coating drum, 50 kg of phosphoric acid slag liquid, wherein the weight percentage of phosphoric acid is 20%, is sprayed on 1 ton of round granular potassium chloride with the temperature of 30 ℃.
2) Adding 55.8 kilograms of mixed powder of 100 meshes of manganese oxide and zinc oxide to the middle end of the coating roller, wherein the weight ratio of the manganese oxide to the zinc oxide to the ferric oxide is 1: 2: 2.
3) spraying 10 kg of phosphoric acid slag liquid at the tail end of the coating roller, wherein the weight percentage of the phosphoric acid is 20 percent, and obtaining the controlled-release round granular potassium sulfate containing 1 percent of manganese oxide, 2 percent of zinc oxide and 2 percent of ferric oxide.
100g of fertilizer is buried in 20kg of soil, 1000ml of water is added into the soil, the soil is placed in a constant temperature and humidity box, the temperature is set to be 25 ℃, and the melting speed of the fertilizer is observed when the humidity is 70 percent.
| Before enveloping/d | After enveloping/d | |
| 1 | 3 | 104 |
| 2 | 3 | 111 |
| 3 | 3 | 110 |
The slow release effect of the fertilizer after coating can be prolonged, and the fertilizer can be slowly released for 101 days.
30g of fertilizer is put into a centrifuge tube to be centrifuged for 3min at 1000r/min, and then a pressure instrument is used for testing pressure.
| before/N of envelope | post-envelope/N | |
| 1 | 66 | 41 |
| 2 | 70 | 50 |
| 3 | 79 | 49 |
。
Claims (6)
1. A preparation method of a multi-nutrient sustained and controlled release round particle potash fertilizer is characterized by comprising the following steps:
(1) spraying a layer of coating liquid on the round granular potash fertilizer at the temperature of 0-80 ℃ at the front end of the coating roller, wherein the coating liquid is phosphoric acid residue liquid, and the weight percentage of phosphoric acid is 20-75%;
(2) spraying a layer of nutrient powder rich in multiple nutrient elements at the middle end of the coating roller, and grinding the nutrient powder to 100-500 meshes.
(3) Spraying a layer of coating liquid at the tail end of the coating roller to obtain the multi-nutrient sustained and controlled release round granular potash fertilizer.
2. The method for preparing the multi-nutrient sustained and controlled release round particle potash fertilizer as claimed in claim 1, wherein: the coating liquid added at the front end of the coating roller and the tail end of the coating roller is 1-5% of round granular potash fertilizer.
3. The method for preparing the multi-nutrient sustained and controlled release round particle potash fertilizer as claimed in claim 1, wherein: the nutrient powder containing multiple nutrient elements added at the middle end of the coating roller is 1-10% of the round granular potash fertilizer.
4. The method for preparing the multi-nutrient sustained and controlled release round particle potash fertilizer as claimed in claim 1, wherein: the preparation method of the multi-nutrient element nutrition powder comprises the following steps:
the multi-nutrient element nutrition powder is prepared by uniformly mixing magnesium oxide, zinc oxide, copper oxide, ferric oxide and/or manganese oxide powder according to a certain proportion, and feeding the mixture into a micro powder vortex mill for grinding until the mesh number of the powder reaches 100-500 meshes.
5. The method for preparing the multi-nutrient sustained and controlled release round particle potash fertilizer as claimed in claim 1, wherein: the round granular potash fertilizer is prepared by drum granulation.
6. The method for preparing the multi-nutrient sustained and controlled release round particle potash fertilizer as claimed in claim 5, wherein: the round granular potash fertilizer is round granular potassium sulfate or round granular potassium chloride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110439530.6A CN113200789A (en) | 2021-04-23 | 2021-04-23 | Preparation method of multi-nutrient sustained and controlled release round particle potash fertilizer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110439530.6A CN113200789A (en) | 2021-04-23 | 2021-04-23 | Preparation method of multi-nutrient sustained and controlled release round particle potash fertilizer |
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| Publication Number | Publication Date |
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| CN113200789A true CN113200789A (en) | 2021-08-03 |
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| CN202110439530.6A Withdrawn CN113200789A (en) | 2021-04-23 | 2021-04-23 | Preparation method of multi-nutrient sustained and controlled release round particle potash fertilizer |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104829331A (en) * | 2015-04-21 | 2015-08-12 | 湖北省农业科学院植保土肥研究所 | Round particle slow release potash fertilizer preparation method |
| CN106045685A (en) * | 2016-05-31 | 2016-10-26 | 湖北富邦科技股份有限公司 | Methods for preparing novel phosphate fertilizer containing sulfur, zinc, boron and/or magnesium medium trace elements |
| CN106045792A (en) * | 2016-05-31 | 2016-10-26 | 湖北富邦科技股份有限公司 | Method for rapidly preparing novel urea containing medium-trace elements |
| CN106083281A (en) * | 2016-05-31 | 2016-11-09 | 湖北富邦科技股份有限公司 | A kind of preparation method containing organic Novel nitrate nitrogen fertilizer or nitro-compound fertilizer |
| CN106278607A (en) * | 2016-08-15 | 2017-01-04 | 湖北富邦科技股份有限公司 | A kind of preparation method containing zinc slow release rounded grain potash fertilizer |
| CN108046885A (en) * | 2017-11-20 | 2018-05-18 | 烟台市烟农富邦肥料科技有限公司 | A kind of manufacturing method of rounded grain zinc boron potassic fertilizer |
-
2021
- 2021-04-23 CN CN202110439530.6A patent/CN113200789A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104829331A (en) * | 2015-04-21 | 2015-08-12 | 湖北省农业科学院植保土肥研究所 | Round particle slow release potash fertilizer preparation method |
| CN106045685A (en) * | 2016-05-31 | 2016-10-26 | 湖北富邦科技股份有限公司 | Methods for preparing novel phosphate fertilizer containing sulfur, zinc, boron and/or magnesium medium trace elements |
| CN106045792A (en) * | 2016-05-31 | 2016-10-26 | 湖北富邦科技股份有限公司 | Method for rapidly preparing novel urea containing medium-trace elements |
| CN106083281A (en) * | 2016-05-31 | 2016-11-09 | 湖北富邦科技股份有限公司 | A kind of preparation method containing organic Novel nitrate nitrogen fertilizer or nitro-compound fertilizer |
| CN106278607A (en) * | 2016-08-15 | 2017-01-04 | 湖北富邦科技股份有限公司 | A kind of preparation method containing zinc slow release rounded grain potash fertilizer |
| CN108046885A (en) * | 2017-11-20 | 2018-05-18 | 烟台市烟农富邦肥料科技有限公司 | A kind of manufacturing method of rounded grain zinc boron potassic fertilizer |
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Application publication date: 20210803 |