CN87102116A - Anhydrous encapsulated fertilizer and manufacture method thereof - Google Patents
Anhydrous encapsulated fertilizer and manufacture method thereof Download PDFInfo
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- CN87102116A CN87102116A CN 87102116 CN87102116A CN87102116A CN 87102116 A CN87102116 A CN 87102116A CN 87102116 CN87102116 CN 87102116 CN 87102116 A CN87102116 A CN 87102116A CN 87102116 A CN87102116 A CN 87102116A
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- phosphorus potassium
- potassium powder
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Abstract
Anhydrous encapsulated fertilizer belongs to a kind of Wrapped fertilizer.It is that core, phosphorus potassium powder fertilizer are N-P-K granulated compound fertilizer of need not any other solvent making binding agent that surrounding layer is formed by urea.Its manufacture method be fused(calcium magnesium)phosphate and potash fertilizer by needed mixed heating after; again Granular Urea is joined the surface of the fertile material of phosphorus potassium powder of heat; softening rapidly or fusing and bonding phosphorus potassium powder fertilizer after urea is heated; along with the rotation of tablets press, the urea of fusing is wrapped up and granulation by phosphorus potassium powder fertilizer.Technology is simple, and energy consumption is low, and facility investment is few, the granulating rate height, and effectively nutrient is stable, can be by user's to production of filling a prescription, the kind of change compound fertilizer is convenient, flexible, is beneficial to the expansion range of product.
Description
The present invention relates to N-P-K granulated compound fertilizer and manufacture method thereof-anhydrous hot pack.It is that a kind of manufacturing of making binding agent without any need for other solvent except that fertilizer itself is core with urea.Phosphorus potassium powder fertilizer is the method for the granulated compound fertilizer of surrounding layer.
The domestic and international at present method with fertiliser production granulated compound fertilizers such as nitrogenous fertilizer, phosphate fertilizer, potash fertilizer has machinery to mix fertilizer, slurry process granulation, pellet granulation or the like, although these methods respectively have its characteristics, but they have a common shortcoming in its production process, need exactly to make binding agent with other solvent.Adopt hydrothermal method to produce granulated compound fertilizer in the past as our factory, because fertilizer such as urea will liquefy with thermals source such as steam, ammonia decreases greatly in the production process, nutrient content instability, and the equipment complexity, production environment is abominable, product cost height, deficiency in economic performance.
" Wrapped fertilizer and manufacturing process thereof " that on February tenth, 1, Chinese Patent Office disclosed the application of Zheng Zhou engineering college (CN85101008A), it is with powder fertilizer fused(calcium magnesium)phosphate to be prepared nitrogen phosphorus fertilizer slurry binding agent in reactive tank, borrow pressurized air by the surface of spray gun with the continuous nitrogenous fertilizer particles such as urea that roll of mud binding agent input, make the urea particle surface wetting, alternately drop into precipitated superphosphate or fused(calcium magnesium)phosphate or bone meal powder or the like subsequently, form until bonded pelleting.Though this method granulation is better, still there are complex process, problem that facility investment is big.
The objective of the invention is to adopt new technology, do not use binding agent and make granular multielement N-p-K compound fertilizer, reach the simplification production technique, reduce facility investment, throw the effect of low production cost.
The present invention is different and the heating of high-melting-point fertilizer is made the low melting point fertilizer fusing granulating that bonds according to its fusing point of different fertilizer, chemical property do not take place again change and realize.Because the fusing point of urea, phosphate fertilizer, three kinds of basic fertilizer of potash fertilizer has nothing in common with each other, and the fusing point of the fusing point of phosphate fertilizer and potash fertilizer is more than the fusing point height of urea.Therefore, phosphate fertilizer and potash fertilizer Hybrid Heating chemical property can not taken place during to the temperature that can melt urea changes.And Granular Urea can soften immediately or melt when touching the fertile surface of the phosphorus potassium powder that is heated to certain temperature and bond phosphorus potassium powder fertilizer and granulation.So, do not need to add any other binding agent.
Method of the present invention is: with phosphate fertilizer and Repone K or vitriolate of tartar mixing post-heating; heating and temperature control is at 120 ℃-200 ℃; then Granular Urea is continuously evenly joined in the tube tablets press of garden by proportioning; when Granular Urea touches the garden tube and crosses the fertile surface of phosphorus potassium powder that has been heated in the machine; Granular Urea can soften or melt immediately, thus the phosphorus potassium powder fertilizer of bonding heat.Because garden tube tablets press constantly rolls, the urea that has been melted is wrapped in the inside of phosphorus potassium powder fertilizer, and to form with urea be core, and phosphorus potassium powder fertilizer is the N-p-K granulated compound fertilizer of surrounding layer.Simultaneously, because the fusing urea that is wrapped has certain centrifugation in rolling, also owing to the cooled contraction of urea, therefore, the particle center is loose hollow state.Regulate the thickness of surrounding layer, can obtain the compound fertilizer dedicated of N-p-K different content.Owing to method of the present invention is the granulated fertilizer that the bonding parcel is formed the low-melting urea of the fertile heating of dystectic phosphorus potassium powder back fusing, make binding agent without any need for solvent, therefore be called anhydrous encapsulated fertilizer.
It is urea, potassium chloride or potassium sulfate and calcium magnesium phosphate that the present invention needs with raw material, does not need any binding agent in the process, and take urea as parent, the fertile heat of phosphorus potassium powder is wrapped up in and formed, in be loose hollow, uniform particles, specious, moderate strength, not water content. Because the raw materials such as urea are not dealt with in addition in the production process, thus the main nutrient free of losses of nitrogen phosphorus potassium, be convenient to accurately prescription requirement metering, the effective nutrient of product is stable.
Pair product that the present invention does not have the chemical combination method to bring, thereby do not have the effect of paying, there is not the biuret increase through chemical examination urea, crops there is not destruction, product is soluble in water, is convenient to crops and absorbs.
Technical process of the present invention is simple, and energy consumption is low, and facility investment is few, the economic benefit height, and the whole process of production full mechanization, system has realized closed cycle, and no particle returning charge has reduced labour intensity in the production, and production environment is pollution-free.
Accompanying drawing is a process flow sheet of the present invention.
Claims (3)
1, a kind of is that core, phosphorus potassium powder fertilizer are the anhydrous encapsulated fertilizer and the manufacture method thereof of surrounding layer with urea, it is characterized in that granular core partly for loose hollow state, does not have other binding agent between core fertilizer-urea and surrounding layer fertilizer-phosphorus potassium powder fertilizer; The fertile surface of phosphorus potassium powder that Granular Urea is put into certain temperature forms the softening or fertile parcel of the fusing bonding phosphorus potassium powder granulation of urea.
2, anhydrous encapsulated fertilizer according to claim 1 and manufacture method thereof is characterized in that mixing between the post-heating to 120 ℃-200 ℃ phosphorus potassium powder is fertile.
3, anhydrous encapsulated fertilizer according to claim 1 and 2 and manufacture method thereof is characterized in that Granular Urea is joined in the garden tube tablets press of continuous rolling the granulation with the fertile surperficial contact melting parcel of phosphorus potassium powder that has been heated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87102116 CN87102116A (en) | 1987-11-20 | 1987-11-20 | Anhydrous encapsulated fertilizer and manufacture method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87102116 CN87102116A (en) | 1987-11-20 | 1987-11-20 | Anhydrous encapsulated fertilizer and manufacture method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87102116A true CN87102116A (en) | 1988-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87102116 Pending CN87102116A (en) | 1987-11-20 | 1987-11-20 | Anhydrous encapsulated fertilizer and manufacture method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN87102116A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103739390A (en) * | 2013-12-30 | 2014-04-23 | 河北省农林科学院农业资源环境研究所 | Coated slow-release compound fertilizer and preparation method thereof |
| CN111548226A (en) * | 2020-06-24 | 2020-08-18 | 黑龙江省科学院大庆分院 | High-efficiency cultivation compound fertilizer for astragalus membranaceus as well as preparation method and fertilizing method thereof |
| CN114452812A (en) * | 2021-12-28 | 2022-05-10 | 深圳华明环保科技有限公司 | Production process of solid-state denitration agent |
-
1987
- 1987-11-20 CN CN 87102116 patent/CN87102116A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103739390A (en) * | 2013-12-30 | 2014-04-23 | 河北省农林科学院农业资源环境研究所 | Coated slow-release compound fertilizer and preparation method thereof |
| CN103739390B (en) * | 2013-12-30 | 2016-03-09 | 河北省农林科学院农业资源环境研究所 | A kind of bag is by slow-release compound fertilizer and preparation method thereof |
| CN111548226A (en) * | 2020-06-24 | 2020-08-18 | 黑龙江省科学院大庆分院 | High-efficiency cultivation compound fertilizer for astragalus membranaceus as well as preparation method and fertilizing method thereof |
| CN114452812A (en) * | 2021-12-28 | 2022-05-10 | 深圳华明环保科技有限公司 | Production process of solid-state denitration agent |
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