CN104829331A - Round particle slow release potash fertilizer preparation method - Google Patents
Round particle slow release potash fertilizer preparation method Download PDFInfo
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- CN104829331A CN104829331A CN201510190548.1A CN201510190548A CN104829331A CN 104829331 A CN104829331 A CN 104829331A CN 201510190548 A CN201510190548 A CN 201510190548A CN 104829331 A CN104829331 A CN 104829331A
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- phosphoric acid
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- potassium
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Abstract
The invention discloses a round particle slow release potash fertilizer preparation method characterized by including the following steps: phosphoric acid or phosphoric acid slag acid solution with the mass concentration of 10-60% is added with an activator at the temperature of 80-120 DEG C for activation for 1-2 h for preparation of a liquid mixture, wherein the mass of the activator accounts for 0.5-2% of the mass of the phosphoric acid or phosphoric acid slag acid solution; the liquid mixture is sprayed into the surface of potassium chloride or potassium sulfate crystals in granulation equipment for formation of a liquid coating membrane, the liquid coating membrane is added with powder magnesium oxide for reaction for the formation of a condensate with certain cohesive force and hardness, by cycling of the step, the liquid mixture and magnesium oxide are alternately added on the surface of potassium chloride or potassium sulfate crystals, under continuous rolling condition, small granular fertilizer is gradually coated, and grows, and a round particle slow release potash fertilizer with the particle size of 4 to 5 mm is obtained. The round particle slow release potash fertilizer has good slow release performance due to the formation of the condensate and difficult solubility property, and contains N, P, Mg and other nutritional elements.
Description
Technical field
The present invention relates to a kind of preparation method of rounded grain slow-release potassium fertilizer, particularly openly one utilizes powdered magnesia and acid-respons, adopts chemistry, material method to make the method for rounded grain slow-release potassium fertilizer material.
Background technology
Repone K/potassium sulfate is a kind of very important potash fertilizer kind.Along with the development of Bulk Blending Fertilizer, the demand of rounded grain potash fertilizer is also day by day vigorous.Potash fertilizer is in the market mainly the irregular of powdery and extruder grain gained, and rounded grain potash fertilizer becomes scarce commodity.Compared with the fertile granulation of conventional composite, the granulation difficulty of potash fertilizer mainly contains following reason: 1. Repone K/potassium sulfate belongs to sand mold material, itself does not have viscosity and plasticity-, adopts ordinary method to be difficult to granulation; 2. Repone K/potassium sulfate solubleness in water is comparatively large, adopt amount of liquid phase needed for pellet granulation too large, so that the granular potash fertilizer intensity formed when granulation is extremely low, cannot realize scale operation; 3. too low wet tenacity makes granular potash fertilizer badly broken when drying, and yield rate is extremely low.
It is very difficult that prior art produces rounded grain potash fertilizer, and there is the shortcomings (China Patent No. CN1769248, CN1356298, CN102765994, CN1530349) such as cost is high, nutrient content is low, granule strength is low.
Method provided by the invention can ensure that potash fertilizer has good outward appearance and granule strength, element such as nitrogen, phosphorus, potassium, magnesium etc. needed for plant growth can be provided again, obtained novel particle potash fertilizer also has good sustained release performance, the effect improving utilization rate of fertilizer can be played, reduce fertilizer cost in use, improve the comprehensive benefit of fertilizer.
Summary of the invention
The invention provides a kind of method utilizing physics, chemical process to produce rounded grain slow-release potassium fertilizer.Present method is simple to operate, is easy to realize suitability for industrialized production, and products obtained therefrom appearance uniform rounding, granule strength is high, nutrient is balanced.And product has good sustained release performance, for raising utilization rate of fertilizer, promote that increasing crop yield increases income significant.
The technical scheme of production rounded grain slow-release potassium fertilizer proposed by the invention is:
A kind of preparation method of rounded grain slow-release potassium fertilizer, it is characterized in that comprising the following steps: mass concentration is that the phosphoric acid of 10-60% or phosphoric acid slag acid solution are at 80-120 DEG C of temperature, add the activator accounting for phosphoric acid or phosphoric acid slag acid solution quality 0.5-2%, activation 1-2h obtains mixed solution; Mixed solution is sprayed onto the Repone K in granulating equipment or potassium sulfate crystal surface; form liquid coating; add powder magnesium oxide subsequently; both react; form the cured article with certain cohesive force and hardness, so move in circles, mixed solution and magnesium oxide are alternately added on Repone K or potassium sulfate crystal surface; under constantly rolling, small-particle fertilizer is wrapped up gradually, is grown up, and obtains the rounded grain slow-release potassium fertilizer of 4-5mm.
The magnesian fineness of powder is 500-1000 order.
Described activator is aluminium hydroxide, ammonium chloride or ammonium sulfate.
The fineness of raw material Repone K or potassium sulfate is 30-60 order.
Described granulating equipment is granulating disc.
An obtained finished product circle granular potash fertilizer nutrients release cycle is 30-60 days.
The present invention utilizes liquid acid and powder magnesium oxide generation chemical reaction to form the principle of adhesive, and under the effect of physical motion, forms rounded grain shape potash fertilizer.The granular potash fertilizer formed has the advantages that slowly dissolve Releasing nutrient, solves potash fertilizer water-soluble rapidly and cause the problem such as nutrient loss, environmental pollution.
The present invention has following outstanding advantage:
1, technological operation is simple.Adopt traditional Chemical Mixed Fertilizer manufacturing process, without the need to additionally increasing equipment.
2, preparation cost is low.Acid mixed solution and magnesium oxide react do cured article both as the material of the balling-up that bonds, the nitrogen needed for plant-growth, phosphorus, magnesium nutrition element are provided again, reduce the comprehensive cost of fertilizer.
3, granule strength is high.The production of fertilizer, storage, transport and use and all require that fertilizer has certain granule strength, the granular potash fertilizer average grain intensity that the present invention obtains, at more than 50N, can reach requirement completely.
4, balling ratio is high.The present invention prepares rounded grain potash fertilizer yield rate and reaches more than 92%, has wide market outlook.
5, sustained release performance is good.The present invention obtains rounded grain potash fertilizer and has good sustained release performance, can improve the absorption rate of crop to nutrient.
Embodiment
Embodiment one
It is in the phosphoric acid solution of quality 10% that 2g aluminium hydroxide, 8g ammonium sulfate are joined 1000g concentration, under agitation keeps 90 DEG C of activation 1.5h, obtained mixed solution.By nutrient content be 62% Repone K raw material add in granulating disc and carry out granulation; powdered magnesia and mixed solution are alternately added on the potassium chloride fertilizer surface of rolling granulation according to the mass ratio of 1:2; until potassium chloride fertilizer particle size growth is to about 4mm, get final product discharging.It is 92% that screening records yield rate, and in finished product, Repone K nutrient content is 58%, and the nutrients release cycle is 30 days.
Embodiment two
It is in the phosphoric acid slag acid solution of quality 20% that 2g aluminium hydroxide, 18g ammonium sulfate are joined 1000g concentration, under agitation keeps 90 DEG C of activation 2h, obtained mixed solution.By nutrient content be 60% Repone K raw material add in granulating disc and carry out granulation; powdered magnesia and mixed solution are alternately added on the potassium chloride fertilizer surface of rolling granulation according to the mass ratio of 1:2; until potassium chloride fertilizer particle size growth is to about 4mm, get final product discharging.It is 95% that screening records yield rate, and in finished product, Repone K nutrient content is 55%, and the nutrients release cycle is 35 days.
Embodiment three
It is in the phosphoric acid solution of quality 60% that 2g aluminium hydroxide, 23g ammonium chloride/ammonium sulfate are joined 1000g concentration, under agitation keeps 90 DEG C of activation 1.5h, obtained mixed solution.Added in granulating disc by potassium sulfate raw material and carry out granulation, powdered magnesia and mixed solution are alternately added on the potash fertilizer surface of rolling granulation according to the mass ratio of 1:2, until potash fertilizer particle size growth is to about 4mm, get final product discharging.It is 93% that screening records yield rate, and in finished product, potassium sulfate nutrient content is 52%, and the nutrients release cycle is 42 days.
Claims (6)
1. the preparation method of a rounded grain slow-release potassium fertilizer, it is characterized in that comprising the following steps: mass concentration is phosphoric acid or the phosphoric acid slag acid solution of 10-60%, at 80-120 DEG C of temperature, add the activator accounting for phosphoric acid or phosphoric acid slag acid solution quality 0.5-2%, activation 1-2h obtains mixed solution; Mixed solution is sprayed onto the Repone K in granulating equipment or potassium sulfate crystal surface; form liquid coating; add powder magnesium oxide subsequently; both react; form the cured article with certain cohesive force and hardness, so move in circles, mixed solution and magnesium oxide are alternately added on Repone K or potassium sulfate crystal surface; under constantly rolling, small-particle fertilizer is wrapped up gradually, is grown up, and obtains the rounded grain slow-release potassium fertilizer that particle diameter is 4-5mm.
2. the preparation method of granule potassium chloride according to claim 1, is characterized in that: the magnesian fineness of powder is 500-1000 order.
3. the preparation method of granule potassium chloride according to claim 1, is characterized in that: described activator is aluminium hydroxide, ammonium chloride or ammonium sulfate.
4. the preparation method of granule potassium chloride according to claim 1, is characterized in that: the fineness of raw material Repone K or potassium sulfate is 30-60 order.
5. the preparation method of granule potassium chloride according to claim 1, is characterized in that: described granulating equipment is granulating disc.
6. the preparation method of granule potassium chloride according to claim 1, is characterized in that: an obtained finished product circle granular potash fertilizer nutrients release cycle is 30-60 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510190548.1A CN104829331A (en) | 2015-04-21 | 2015-04-21 | Round particle slow release potash fertilizer preparation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510190548.1A CN104829331A (en) | 2015-04-21 | 2015-04-21 | Round particle slow release potash fertilizer preparation method |
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| CN104829331A true CN104829331A (en) | 2015-08-12 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105601423A (en) * | 2015-12-24 | 2016-05-25 | 贵州省化工研究院 | Long-acting slow-release organic-inorganic compound N fertilizer and preparation method thereof |
| 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 |
| CN108083925A (en) * | 2018-01-20 | 2018-05-29 | 斯科沃肥业（山东）有限公司 | A kind of preparation method of round shaped grain potash fertilizer |
| CN111454107A (en) * | 2020-03-02 | 2020-07-28 | 中化农业（临沂）研发中心有限公司 | Coated urea containing humic acid and preparation method and application thereof |
| CN113200789A (en) * | 2021-04-23 | 2021-08-03 | 湖北富邦科技股份有限公司 | Preparation method of multi-nutrient sustained and controlled release round particle potash fertilizer |
| CN113603558A (en) * | 2021-07-20 | 2021-11-05 | 烟台市烟农富邦肥料科技有限公司 | Granulation method for increasing wet strength of round granular potash fertilizer |
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| CN1143062A (en) * | 1995-08-17 | 1997-02-19 | 郑州乐喜施磷复肥技术研究推广中心 | Releasion controlled fertilizer |
| CN1800114A (en) * | 2006-01-19 | 2006-07-12 | 北京海依飞科技有限公司 | Rhizosphere friendly fertilizer and its production method |
| CN103497022A (en) * | 2013-10-14 | 2014-01-08 | 四川大学 | Controlled release mixed and compound 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 |
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2015
- 2015-04-21 CN CN201510190548.1A patent/CN104829331A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1143062A (en) * | 1995-08-17 | 1997-02-19 | 郑州乐喜施磷复肥技术研究推广中心 | Releasion controlled fertilizer |
| CN1800114A (en) * | 2006-01-19 | 2006-07-12 | 北京海依飞科技有限公司 | Rhizosphere friendly fertilizer and its production method |
| CN103497022A (en) * | 2013-10-14 | 2014-01-08 | 四川大学 | Controlled release mixed and compound 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 |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105601423A (en) * | 2015-12-24 | 2016-05-25 | 贵州省化工研究院 | Long-acting slow-release organic-inorganic compound N fertilizer and preparation method thereof |
| 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 |
| WO2018032844A1 (en) * | 2016-08-15 | 2018-02-22 | 湖北富邦科技股份有限公司 | Method for preparing zinc-containing sustained-release pellet potash fertilizer |
| CN108083925A (en) * | 2018-01-20 | 2018-05-29 | 斯科沃肥业（山东）有限公司 | A kind of preparation method of round shaped grain potash fertilizer |
| CN111454107A (en) * | 2020-03-02 | 2020-07-28 | 中化农业（临沂）研发中心有限公司 | Coated urea containing humic acid and preparation method and application thereof |
| CN111454107B (en) * | 2020-03-02 | 2022-04-26 | 中化农业（临沂）研发中心有限公司 | Coated urea containing humic acid and preparation method and application thereof |
| CN113200789A (en) * | 2021-04-23 | 2021-08-03 | 湖北富邦科技股份有限公司 | Preparation method of multi-nutrient sustained and controlled release round particle potash fertilizer |
| CN113603558A (en) * | 2021-07-20 | 2021-11-05 | 烟台市烟农富邦肥料科技有限公司 | Granulation method for increasing wet strength of round granular potash fertilizer |
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Application publication date: 20150812 |