CN103613464A - Sustained-release compound fertilizer and preparation method thereof - Google Patents
Sustained-release compound fertilizer and preparation method thereof Download PDFInfo
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- CN103613464A CN103613464A CN201310615165.5A CN201310615165A CN103613464A CN 103613464 A CN103613464 A CN 103613464A CN 201310615165 A CN201310615165 A CN 201310615165A CN 103613464 A CN103613464 A CN 103613464A
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- compound fertilizer
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Abstract
The invention relates to a sustained-release compound fertilizer which comprises the following components in parts by weight: 55-70 parts of fly ash, 15-30 parts of kaolin, 5-10 parts of sodium carbonate, 4-5 parts of adhesive and 20-30 parts of compound fertilizer. The sustained-release compound fertilizer is prepared by the following steps of weighing fly ash and kaolin, adding into a grinding container and grinding for 30 minutes; putting the ground fly ash and kaolin into a stirring container, stirring uniformly and adding sodium carbonate and water to obtain a solution; adding the solution obtained by the step II into a reaction kettle, and aging and crystallizing; filtering the solution after aging and crystallizing, and washing to obtain a fly ash-kaolin crystal; drying the crystal to obtain powder; granulating the powder obtained by the step V, the compound fertilizer and the adhesive, and drying to obtain the sustained-release compound fertilizer. According to the sustained-release compound fertilizer and preparation method thereof provided by the invention, the process is simple, the production period is short, the cost of the raw materials is low, and the sustained-release compound fertilizer is easy to degrade.
Description
Technical field
The present invention relates to a kind of fertilizer, particularly a kind of slow-release compound fertilizer and preparation method thereof.
Background technology
Along with China's chemical fertilizer industry technical progress, chemical fertilizer is just towards the improvement future development of Composite, slowly-releasing, production.The fifties, China adopted wet production compound nitrogen phosphate fertilizer, add sylvite to obtain Nitrogen, Phosphorus and Potassium, but production process was owing to adding a large amount of water, while being dried thereafter, need dehydration, cause the waste of power and water, urea adds the discharge that membership reduces HF, but thoroughly do not eliminate yet, environmental pollution is still serious.
Now also there is relevant design, CN102826920A as open in Chinese patent, the compound slow release fertilizer that the perlite of take is carrier, take perlite as carrier, it by concentration, is the nitrogenous fertilizer of 0～5～10% sulfuric acid and 20～40%, aqueous solution of urea balanced mix, be that 10～30% potassium elements are fertile with concentration again, as potassium sulfate solution equivalent or doubly amount mixing, by weight ratio, 1 part of 3 parts of cooperation pearlstone of the above-mentioned aqueous solution, 2 parts of phosphorous powdered fertilizers, by above-mentioned sulfuric acid, nitrogenous fertilizer, the fertile aqueous solution of potassium element is sprayed on perlite particle, at tablets press inner edge, spray mixed solution, phosphorous powdered fertilizer is sprayed on limit, form particulate state ternary compound slow release fertilizer, drying obtains finished product.
But above-mentioned employing perlite is as the high hard degradation of the high tooling cost of its intensity of slow-release fertilizer carrier, and its raw material sources are less.
Summary of the invention
In order to solve existing slow-release fertilizer, adopt perlite as the high hard degradation of the high tooling cost of its intensity of slow-release fertilizer carrier, its raw material sources are less, the invention provides a kind of slow-release compound fertilizer and preparation method thereof.
The technical solution adopted for the present invention to solve the technical problems is: a kind of slow-release compound fertilizer, its component, in weight fraction, comprises 55-70 part flyash, 15-30 part kaolin, 5-10 part sodium carbonate, 4-5 part cakingagent, 20-30 part composite fertilizer.
A preparation method for slow-release compound fertilizer, is characterized in that, preparation process is as follows:
(1) flyash and kaolin add in grinding container and grind 30 minutes after weighing;
(2) flyash after grinding and kaolin being put into stirred vessel stirs and adds sodium carbonate and water to make solution;
(3) solution step 2 being made adds ageing crystallization in reactor;
(4) solution filter after aging crystallization washing are obtained to flyash kaolin crystal;
(5) to making powder after crystal oven dry;
(6) powder step 5 being made and composite fertilizer and cakingagent granulation are dried again.
The invention has the beneficial effects as follows: technique is simple, with short production cycle, raw materials cost is low, is easy to degraded.
Embodiment
To describe the present invention in detail with specific embodiment below, illustrative examples wherein and explanation are only used for explaining the present invention, but not as a limitation of the invention.
Embodiment 1, will after 55 parts of flyash and 15 parts of kaolin weighings, add in grinding container and grind 30 minutes; Flyash after grinding and kaolin are put into stirred vessel to stir and adds 5 parts of sodium carbonate and water to make solution; Above-mentioned prepared solution is added to ageing crystallization in reactor; Solution filter after aging crystallization washing are obtained to flyash kaolin crystal; After being dried, crystal makes powder; The powder He20Fen composite fertilizer making and 4 parts of cakingagent granulations are dried again.
Embodiment 2, will after 62 parts of flyash and 30 parts of kaolin weighings, add in grinding container and grind 30 minutes; Flyash after grinding and kaolin are put into stirred vessel to stir and adds 7 parts of sodium carbonate and water to make solution; Above-mentioned prepared solution is added to ageing crystallization in reactor; Solution filter after aging crystallization washing are obtained to flyash kaolin crystal; After being dried, crystal makes powder; The powder He25Fen composite fertilizer making and 4 parts of cakingagent granulations are dried again.
Embodiment 3, will after 70 parts of flyash and 20 parts of kaolin weighings, add in grinding container and grind 30 minutes; Flyash after grinding and kaolin are put into stirred vessel to stir and adds 10 parts of sodium carbonate and water to make solution; Above-mentioned prepared solution is added to ageing crystallization in reactor; Solution filter after aging crystallization washing are obtained to flyash kaolin crystal; After being dried, crystal makes powder; The powder He30Fen composite fertilizer making and 5 parts of cakingagent granulations are dried again.
The present invention not only technique is simple, with short production cycle, and raw materials cost is low, is easy to degraded.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (2)
1. a slow-release compound fertilizer, is characterized in that, its component, in weight fraction, comprises 55-70 part flyash, 15-30 part kaolin, 5-10 part sodium carbonate, 4-5 part cakingagent, 20-30 part composite fertilizer.
2. a preparation method for slow-release compound fertilizer, is characterized in that, preparation process is as follows: flyash and kaolin add in grinding container and grind 30 minutes after weighing; Flyash after grinding and kaolin are put into stirred vessel to stir and adds sodium carbonate and water to make solution; The solution that step 2 is made adds ageing crystallization in reactor; Solution filter after aging crystallization washing are obtained to flyash kaolin crystal; After being dried, crystal makes powder; The powder that step 5 is made and composite fertilizer and cakingagent granulation are dried again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310615165.5A CN103613464A (en) | 2013-11-28 | 2013-11-28 | Sustained-release compound fertilizer and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310615165.5A CN103613464A (en) | 2013-11-28 | 2013-11-28 | Sustained-release compound fertilizer and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103613464A true CN103613464A (en) | 2014-03-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201310615165.5A Pending CN103613464A (en) | 2013-11-28 | 2013-11-28 | Sustained-release compound fertilizer and preparation method thereof |
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| CN (1) | CN103613464A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111712321A (en) * | 2018-02-27 | 2020-09-25 | 死海工程有限公司 | Potassium dust pelletizing process |
-
2013
- 2013-11-28 CN CN201310615165.5A patent/CN103613464A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111712321A (en) * | 2018-02-27 | 2020-09-25 | 死海工程有限公司 | Potassium dust pelletizing process |
| CN111712321B (en) * | 2018-02-27 | 2023-09-15 | 死海工程有限公司 | Potash dust granulating process |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140305 |