CN111170779A - Water-soluble fertilizer and preparation method thereof - Google Patents
Water-soluble fertilizer and preparation method thereof Download PDFInfo
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- CN111170779A CN111170779A CN201811330012.5A CN201811330012A CN111170779A CN 111170779 A CN111170779 A CN 111170779A CN 201811330012 A CN201811330012 A CN 201811330012A CN 111170779 A CN111170779 A CN 111170779A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
Abstract
A water-soluble fertilizer and a preparation method thereof relate to the technical field of chemical fertilizer manufacturing, in particular to a water-soluble fertilizer and a preparation method thereof. The water-soluble fertilizer is prepared from the following raw materials in parts by weight: agricultural potassium dihydrogen phosphate, agricultural potassium sulfate, urea, agricultural amino acid, agricultural zinc sulfate, agricultural borax, agricultural rare earth, molybdenum, agricultural magnesium sulfate, agricultural calcium carbonate, agricultural ferrous sulfate, agricultural copper sulfate, agricultural sodium sulfate, and agricultural manganese sulfate; the agricultural calcium carbonate comprises calcite, limestone, chalk and shells, and the weight ratio of the calcite to the limestone to the chalk to the shells is 3-4: 1-2. After the technical scheme is adopted, the invention has the beneficial effects that: the fertilizer has the characteristics of simple preparation process, high use value, low cost, good instant property and absorption rate, good appearance, pure white crystals and convenient fertilization.
Description
Technical Field
The invention relates to the technical field of chemical fertilizer manufacturing, in particular to a water-soluble fertilizer and a preparation method thereof.
Background
The water-soluble fertilizer is a compound fertilizer containing nitrogen, phosphorus, potassium, calcium, magnesium, trace elements, amino acid, humic acid, alginic acid and the like, which can be completely dissolved in water. The fertilizer is divided into a solid water-soluble fertilizer and a liquid water-soluble fertilizer in form. Compared with the traditional calcium superphosphate, granulated compound fertilizer and other varieties, the water-soluble fertilizer has obvious advantages. It is a quick-acting fertilizer, has good water solubility and no residue, can be completely dissolved in water, and can be directly absorbed and utilized by the root system and leaf surface of crops. The water and fertilizer are applied simultaneously, and water is used for carrying the fertilizer, so that the water and fertilizer integration is realized, and the effective absorption rate of the fertilizer is more than one time higher than that of the common fertilizer and reaches 80-90 percent; and the fertilizer efficiency is fast, and the nutritional requirement of the high-yield crops in the fast growth period can be met. The water demand of the drip irrigation system is only 30% of that of the common fertilizer, and the fertilization operation almost needs no manpower, so that the labor cost is greatly saved. There have been increasing numbers of soil fertility experts, agricultural technology extension experts, agricultural dealers and farmers recognizing the importance of water soluble fertilizers.
However, the water soluble fertilizer in the current market is often manufactured by a complex process, has serious pollution to soil, low water solubility, poor absorptivity and high cost.
Disclosure of Invention
The invention aims to provide a water-soluble fertilizer and a preparation method thereof aiming at the defects and deficiencies of the prior art, and the water-soluble fertilizer has the advantages of simple preparation process, high use value, lower cost, good instant solubility and absorptivity, good appearance, pure white crystallization and convenient fertilization.
In order to achieve the purpose, the invention adopts the following technical scheme:
the water-soluble fertilizer is prepared from the following raw materials in parts by weight:
260-400 kg of agricultural monopotassium phosphate, 80-160 kg of agricultural potassium sulfate, 360-500 kg of urea, 30-60 kg of agricultural amino acid, 20-40 kg of agricultural zinc sulfate, 5-10 kg of agricultural borax, 1-3 kg of agricultural rare earth, 1-4 kg of molybdenum, 10-25 kg of agricultural magnesium sulfate, 2-10 kg of agricultural calcium carbonate, 2-10 kg of agricultural ferrous sulfate, 4-15 kg of agricultural copper sulfate, 2-10 kg of agricultural sodium sulfate and 2-10 kg of agricultural manganese sulfate;
the agricultural calcium carbonate comprises calcite, limestone, chalk and shells, and the weight ratio of the calcite to the limestone to the chalk to the shells is 3-4: 1-2.
The manufacturing method comprises the following steps:
A. preparing the agricultural calcium carbonate:
calcining calcite, limestone, chalk, shells and other raw materials to generate lime and carbon dioxide, and adding water to digest the lime to generate lime milk;
secondly, introducing carbon dioxide, carbonizing the lime milk, and generating calcium carbonate precipitate;
thirdly, dehydrating, drying and crushing the generated calcium carbonate precipitate to obtain the agricultural calcium carbonate;
B. mixing:
firstly, crushing agricultural potassium sulfate, and then filtering impurities;
secondly, crushing the agricultural potassium dihydrogen phosphate, and then filtering impurities;
thirdly, crushing the urea, and then filtering impurities;
fourthly, mixing the powder obtained by crushing and filtering the agricultural potassium dihydrogen phosphate, the agricultural potassium sulfate and the urea, and then stirring for 1H-2H at the stirring speed of 1000r/mim to obtain a first mixture;
mixing agricultural amino acid, agricultural zinc sulfate, agricultural borax and agricultural rare earth, crushing after mixing and stirring, and stirring for the second time after crushing, wherein the stirring time is 0.5H-1H, and the stirring speed is 400r/mim to obtain a second mixture;
mixing molybdenum with agricultural magnesium sulfate, agricultural ferrous sulfate, agricultural copper sulfate, agricultural sodium sulfate and agricultural manganese sulfate, wherein the molybdenum is dissolved with the agricultural magnesium sulfate, the agricultural ferrous sulfate, the agricultural copper sulfate, the agricultural sodium sulfate and the agricultural manganese sulfate to obtain a third mixture;
seventhly, mixing the first mixture, the second mixture and the third mixture again, adding agricultural calcium carbonate in the mixing process, and then stirring for 2H-4H at a stirring speed of 6000r/mim to obtain mixed powder;
eighthly, filtering the mixed powder to remove impurities, evaporating and concentrating, cooling and crystallizing, and finally obtaining the water-soluble crystallized fine granular fertilizer through crystallization and separation.
In the fourth step of the step B, the mixing is carried out at the temperature of 25-35 ℃.
In the fifth step of the step B, agricultural calcium carbonate is added before each stirring. Calcium carbonate is an inorganic compound, commonly known as: limestone, stone powder, marble, and the like. Calcium carbonate is neutral, substantially insoluble in water, and soluble in hydrochloric acid. It is one of the common substances on earth, exists in aragonite, calcite, chalk, limestone, marble, travertine and other rocks, and is also the main component of animal bones or shells. Calcium carbonate is also an important building material and has a wide range of industrial applications.
After the technical scheme is adopted, the invention has the beneficial effects that: the fertilizer has the characteristics of simple preparation process, high use value, low cost, good instant property and absorption rate, good appearance, pure white crystals and convenient fertilization.
Detailed Description
Example 1
The technical scheme adopted by the specific implementation mode is as follows: the water-soluble fertilizer is prepared from the following raw materials in parts by weight: 260kg of agricultural monopotassium phosphate, 80kg of agricultural potassium sulfate, 360kg of urea, 30kg of agricultural amino acid, 20kg of agricultural zinc sulfate, 5kg of agricultural borax, 1kg of agricultural rare earth, 1kg of molybdenum, 10kg of agricultural magnesium sulfate, 2kg of agricultural calcium carbonate, 2kg of agricultural ferrous sulfate, 4kg of agricultural copper sulfate, 2kg of agricultural sodium sulfate and 2kg of agricultural manganese sulfate;
the agricultural calcium carbonate comprises calcite, limestone, chalk and shells, and the weight ratio of the calcite to the limestone to the chalk to the shells is 3-4: 1-2.
The manufacturing method comprises the following steps:
A. preparing the agricultural calcium carbonate:
calcining calcite, limestone, chalk, shells and other raw materials to generate lime and carbon dioxide, and adding water to digest the lime to generate lime milk;
secondly, introducing carbon dioxide, carbonizing the lime milk, and generating calcium carbonate precipitate;
thirdly, dehydrating, drying and crushing the generated calcium carbonate precipitate to obtain the agricultural calcium carbonate;
B. mixing:
firstly, crushing agricultural potassium sulfate, and then filtering impurities;
secondly, crushing the agricultural potassium dihydrogen phosphate, and then filtering impurities;
thirdly, crushing the urea, and then filtering impurities;
fourthly, mixing the powder obtained by crushing and filtering the agricultural potassium dihydrogen phosphate, the agricultural potassium sulfate and the urea, and then stirring for 1H-2H at the stirring speed of 1000r/mim to obtain a first mixture;
mixing agricultural amino acid, agricultural zinc sulfate, agricultural borax and agricultural rare earth, crushing after mixing and stirring, and stirring for the second time after crushing, wherein the stirring time is 0.5H-1H, and the stirring speed is 400r/mim to obtain a second mixture;
mixing molybdenum with agricultural magnesium sulfate, agricultural ferrous sulfate, agricultural copper sulfate, agricultural sodium sulfate and agricultural manganese sulfate, wherein the molybdenum is dissolved with the agricultural magnesium sulfate, the agricultural ferrous sulfate, the agricultural copper sulfate, the agricultural sodium sulfate and the agricultural manganese sulfate to obtain a third mixture;
seventhly, mixing the first mixture, the second mixture and the third mixture again, adding agricultural calcium carbonate in the mixing process, and then stirring for 2H-4H at a stirring speed of 6000r/mim to obtain mixed powder;
eighthly, filtering the mixed powder to remove impurities, evaporating and concentrating, cooling and crystallizing, and finally obtaining the water-soluble crystallized fine granular fertilizer through crystallization and separation.
Monopotassium phosphate is a chemical with the chemical formula KH2PO 4. Has deliquescence property. Heating to 400 deg.C to melt into transparent liquid, cooling, and solidifying to obtain opaque glassy potassium metaphosphate. Stable in air, soluble in water, and insoluble in ethanol. Industrially used as a buffer, a culture agent; also used as a bacterial culture agent to synthesize a clear flavoring agent, a raw material for preparing potassium metaphosphate, a culture agent of brewing yeast, an enhancer, a leavening agent and a fermentation aid. Is used as high-efficiency phosphorus-potassium compound fertilizer in agriculture.
Potassium sulfate is an important chlorine-free potassium fertilizer containing sulfur and potassium elements. Generally, the content is 50-52%, and the S content is about 18%. The pure potassium sulfate is colorless crystal, and the appearance of the agricultural potassium sulfate is mostly light yellow. The potassium sulfate has the advantages of small hygroscopicity, difficult caking, good physical properties and convenient application, and is a good water-soluble potassium fertilizer. The potassium sulfate is especially suitable for industrial crops such as tobacco, grape, beet, tea tree, potato, flax and various fruit trees, etc. which are contraindicated to chlorine and potassium. It is also the main raw material for preparing chlorine-free nitrogen, phosphorus and potassium three-component composite fertilizer. The potassium sulfate is a chemically neutral and physiologically acidic fertilizer, and is suitable for various soils and crops. After the fertilizer is applied to soil, potassium ions can be directly absorbed and utilized by crops and can also be adsorbed by soil colloid. The potassium sulfate is applied to crops needing more sulfur, such as cruciferous crops and the like, on the sulfur-deficient soil, so that the effect is better.
Urea, also known as carbamide, is an organic compound consisting of carbon, nitrogen, oxygen, and hydrogen, which is a white crystal. One of the simplest organic compounds is the major nitrogen-containing end product of the metabolic breakdown of proteins in mammals and certain fish. Is also the nitrogen fertilizer with the highest nitrogen content at present. As a neutral fertilizer, urea is suitable for various soils and plants. It is easy to preserve, convenient to use, and has little destructive effect on soil, and is a chemical nitrogen fertilizer with larger use amount at present. The synthesis of urea is carried out industrially with ammonia and carbon dioxide under certain conditions.
Rare earth is a lanthanide element in the periodic table of chemical elements, and is called rare earth (RE or R) for short. Agricultural rare earth (also called rare earth agricultural), english: rare Earths is a new discipline for Rare earth chemical engineering and Rare earth biological separation, and comprises two aspects of plant application and animal application.
Molybdenum is a trace element necessary for human bodies, animals and plants. Is silvery white metal, hard and tough. Various tissues of human body contain molybdenum, the total amount in human body is 9mg, and the content in liver and kidney is highest. Molybdenum is a transition element, is easy to change the oxidation state of the molybdenum, and plays a role in transferring electrons in the in vivo oxidation-reduction reaction. In the oxidized form, molybdenum is likely to be in the +6 state. Although it is also likely to be reduced to the +5 valence state first during electron transfer. However, other oxidation states of molybdenum have also been found in reduced enzymes. Molybdenum is a component of xanthine oxidase/dehydrogenase, aldehyde oxidase and sulfite oxidase, and thus is known to be an essential trace element for human body, animals and plants.
Example 2
The difference between the embodiment and the embodiment 1 is that the material comprises the following raw materials in parts by weight: 300kg of agricultural monopotassium phosphate, 100kg of agricultural potassium sulfate, 400kg of urea, 40kg of agricultural amino acid, 26kg of agricultural zinc sulfate, 6kg of agricultural borax, 1.2kg of agricultural rare earth, 1.5kg of molybdenum, 13kg of agricultural magnesium sulfate, 4kg of agricultural calcium carbonate, 4kg of agricultural ferrous sulfate, 5kg of agricultural copper sulfate, 4kg of agricultural sodium sulfate and 4kg of agricultural manganese sulfate;
the agricultural calcium carbonate comprises calcite, limestone, chalk and shells, and the weight ratio of the calcite to the limestone to the chalk to the shells is 3-4: 1-2.
The other raw material compositions and the formula process are the same as those of the example 1.
Example 3
The difference between the embodiment and the embodiment 1 is that the material comprises the following raw materials in parts by weight: 330kg of agricultural monopotassium phosphate, 120kg of agricultural potassium sulfate, 420kg of urea, 44kg of agricultural amino acid, 28kg of agricultural zinc sulfate, 7kg of agricultural borax, 1.5kg of agricultural rare earth, 2kg of molybdenum, 15kg of agricultural magnesium sulfate, 5kg of agricultural calcium carbonate, 5kg of agricultural ferrous sulfate, 8kg of agricultural copper sulfate, 5kg of agricultural sodium sulfate and 5kg of agricultural manganese sulfate;
the agricultural calcium carbonate comprises calcite, limestone, chalk and shells, and the weight ratio of the calcite to the limestone to the chalk to the shells is 3-4: 1-2.
The other raw material compositions and the formula process are the same as those of the example 1.
Example 4
The difference between the embodiment and the embodiment 1 is that the material comprises the following raw materials in parts by weight: 400kg of agricultural monopotassium phosphate, 160kg of agricultural potassium sulfate, 500kg of urea, 60kg of agricultural amino acid, 40kg of agricultural zinc sulfate, 10kg of agricultural borax, 3kg of agricultural rare earth, 4kg of molybdenum, 25kg of agricultural magnesium sulfate, 10kg of agricultural calcium carbonate, 10kg of agricultural ferrous sulfate, 15kg of agricultural copper sulfate, 10kg of agricultural sodium sulfate and 10kg of agricultural manganese sulfate;
the agricultural calcium carbonate comprises calcite, limestone, chalk and shells, and the weight ratio of the calcite to the limestone to the chalk to the shells is 3-4: 1-2.
The other raw material compositions and the formula process are the same as those of the example 1.
After the technical scheme is adopted, the invention has the beneficial effects that: the fertilizer has the characteristics of simple preparation process, high use value, low cost, good instant property and absorption rate, good appearance, pure white crystals and convenient fertilization.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. The water-soluble fertilizer is characterized by comprising the following raw materials in parts by weight: 260-400 kg of agricultural monopotassium phosphate, 80-160 kg of agricultural potassium sulfate, 360-500 kg of urea, 30-60 kg of agricultural amino acid, 20-40 kg of agricultural zinc sulfate, 5-10 kg of agricultural borax, 1-3 kg of agricultural rare earth, 1-4 kg of molybdenum, 10-25 kg of agricultural magnesium sulfate, 2-10 kg of agricultural calcium carbonate, 2-10 kg of agricultural ferrous sulfate, 4-15 kg of agricultural copper sulfate, 2-10 kg of agricultural sodium sulfate and 2-10 kg of agricultural manganese sulfate;
the agricultural calcium carbonate comprises calcite, limestone, chalk and shells, and the weight ratio of the calcite to the limestone to the chalk to the shells is 3-4: 1-2.
2. The preparation method of the water-soluble fertilizer is characterized by comprising the following steps:
A. preparing the agricultural calcium carbonate:
calcining calcite, limestone, chalk, shells and other raw materials to generate lime and carbon dioxide, and adding water to digest the lime to generate lime milk;
secondly, introducing carbon dioxide, carbonizing the lime milk, and generating calcium carbonate precipitate;
thirdly, dehydrating, drying and crushing the generated calcium carbonate precipitate to obtain the agricultural calcium carbonate;
B. mixing:
firstly, crushing agricultural potassium sulfate, and then filtering impurities;
secondly, crushing the agricultural potassium dihydrogen phosphate, and then filtering impurities;
thirdly, crushing the urea, and then filtering impurities;
fourthly, mixing the powder obtained by crushing and filtering the agricultural potassium dihydrogen phosphate, the agricultural potassium sulfate and the urea, and then stirring for 1H-2H at the stirring speed of 1000r/mim to obtain a first mixture;
mixing agricultural amino acid, agricultural zinc sulfate, agricultural borax and agricultural rare earth, crushing after mixing and stirring, and stirring for the second time after crushing, wherein the stirring time is 0.5H-1H, and the stirring speed is 400r/mim to obtain a second mixture;
mixing molybdenum with agricultural magnesium sulfate, agricultural ferrous sulfate, agricultural copper sulfate, agricultural sodium sulfate and agricultural manganese sulfate, wherein the molybdenum is dissolved with the agricultural magnesium sulfate, the agricultural ferrous sulfate, the agricultural copper sulfate, the agricultural sodium sulfate and the agricultural manganese sulfate to obtain a third mixture;
seventhly, mixing the first mixture, the second mixture and the third mixture again, adding agricultural calcium carbonate in the mixing process, and then stirring for 2H-4H at a stirring speed of 6000r/mim to obtain mixed powder;
eighthly, filtering the mixed powder to remove impurities, evaporating and concentrating, cooling and crystallizing, and finally obtaining the water-soluble crystallized fine granular fertilizer through crystallization and separation.
3. The water-soluble fertilizer as claimed in claim 1, which is prepared from the following raw materials in parts by weight: 260kg of agricultural monopotassium phosphate, 80kg of agricultural potassium sulfate, 360kg of urea, 30kg of agricultural amino acid, 20kg of agricultural zinc sulfate, 5kg of agricultural borax, 1kg of agricultural rare earth, 1kg of molybdenum, 10kg of agricultural magnesium sulfate, 2kg of agricultural calcium carbonate, 2kg of agricultural ferrous sulfate, 4kg of agricultural copper sulfate, 2kg of agricultural sodium sulfate and 2kg of agricultural manganese sulfate;
the agricultural calcium carbonate comprises calcite, limestone, chalk and shells, and the weight ratio of the calcite to the limestone to the chalk to the shells is 3-4: 1-2.
4. The water-soluble fertilizer as claimed in claim 1, which is prepared from the following raw materials in parts by weight: 300kg of agricultural monopotassium phosphate, 100kg of agricultural potassium sulfate, 400kg of urea, 40kg of agricultural amino acid, 26kg of agricultural zinc sulfate, 6kg of agricultural borax, 1.2kg of agricultural rare earth, 1.5kg of molybdenum, 13kg of agricultural magnesium sulfate, 4kg of agricultural calcium carbonate, 4kg of agricultural ferrous sulfate, 5kg of agricultural copper sulfate, 4kg of agricultural sodium sulfate and 4kg of agricultural manganese sulfate;
the agricultural calcium carbonate comprises calcite, limestone, chalk and shells, and the weight ratio of the calcite to the limestone to the chalk to the shells is 3-4: 1-2.
5. The water-soluble fertilizer as claimed in claim 1, which is prepared from the following raw materials in parts by weight: 330kg of agricultural monopotassium phosphate, 120kg of agricultural potassium sulfate, 420kg of urea, 44kg of agricultural amino acid, 28kg of agricultural zinc sulfate, 7kg of agricultural borax, 1.5kg of agricultural rare earth, 2kg of molybdenum, 15kg of agricultural magnesium sulfate, 5kg of agricultural calcium carbonate, 5kg of agricultural ferrous sulfate, 8kg of agricultural copper sulfate, 5kg of agricultural sodium sulfate and 5kg of agricultural manganese sulfate;
the agricultural calcium carbonate comprises calcite, limestone, chalk and shells, and the weight ratio of the calcite to the limestone to the chalk to the shells is 3-4: 1-2.
6. The water-soluble fertilizer as claimed in claim 1, which is prepared from the following raw materials in parts by weight: 400kg of agricultural monopotassium phosphate, 160kg of agricultural potassium sulfate, 500kg of urea, 60kg of agricultural amino acid, 40kg of agricultural zinc sulfate, 10kg of agricultural borax, 3kg of agricultural rare earth, 4kg of molybdenum, 25kg of agricultural magnesium sulfate, 10kg of agricultural calcium carbonate, 10kg of agricultural ferrous sulfate, 15kg of agricultural copper sulfate, 10kg of agricultural sodium sulfate and 10kg of agricultural manganese sulfate;
the agricultural calcium carbonate comprises calcite, limestone, chalk and shells, and the weight ratio of the calcite to the limestone to the chalk to the shells is 3-4: 1-2.
7. The preparation method of the water-soluble fertilizer as claimed in claim 2, wherein: in the fourth step of the step B, the mixing is carried out at the temperature of 25-35 ℃.
8. The preparation method of the water-soluble fertilizer as claimed in claim 2, wherein: in the fifth step of the step B, agricultural calcium carbonate is added before each stirring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811330012.5A CN111170779A (en) | 2018-11-09 | 2018-11-09 | Water-soluble fertilizer and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811330012.5A CN111170779A (en) | 2018-11-09 | 2018-11-09 | Water-soluble fertilizer and preparation method thereof |
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| CN111170779A true CN111170779A (en) | 2020-05-19 |
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| CN201811330012.5A Pending CN111170779A (en) | 2018-11-09 | 2018-11-09 | Water-soluble fertilizer and preparation method thereof |
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- 2018-11-09 CN CN201811330012.5A patent/CN111170779A/en active Pending
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Application publication date: 20200519 |
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