CN1187116C - Process for preparing granular fertilizer - Google Patents
Process for preparing granular fertilizer Download PDFInfo
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- CN1187116C CN1187116C CNB001332805A CN00133280A CN1187116C CN 1187116 C CN1187116 C CN 1187116C CN B001332805 A CNB001332805 A CN B001332805A CN 00133280 A CN00133280 A CN 00133280A CN 1187116 C CN1187116 C CN 1187116C
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Abstract
The present invention relates to a manufacturing method of granular fertilizer, which belongs to the technical field of chemical fertilizer. The method is mainly characterized in that 5% to 50% (by weight) of granulating and binding agents is added into a raw material, and simultaneously 3% to 30% (by weight) of activation agents is added for granulation; the granular fertilizer having the advantages of uniform granularity, round granules and high strength can be obtained after drying, cooling and screening. The method is suitable for the production of various kinds of single element granular fertilizer, such as granular potassium chloride, granular potassium sulfate, etc., and is also suitable for the production of multi-element special complex fertilizer. The method has the characteristics of simple manufacturing process, investment saving, low cost, high granule quality, etc.
Description
Technical field: a kind of manufacture method of granulated fertilizer, belong to chemical fertilizer manufacturing technology field, be specifically related to carry out the manufacture method of the granulated fertilizer of single nutrient or polynary nutrient, be particularly useful for the production of granule potassium chloride, granular potassium sulfate, particle N-K fertilizer with various raw materials.
Background technology: China middle-size and small-size production of compound fertilizer producer generally adopts disk granulating method or cylinder granulating method to produce composite fertilizer, for the various nutrient raw materials that are difficult to balling-up, more than two kinds of methods be difficult to carry out the production of granulated fertilizer, to this general extruder grain method that adopts.Because the product granularity that the extruder grain method is produced is inhomogeneous, particle shape is rounding not, is unfavorable for using on bulk blended fertilizer, can not adapt to the requirement of mechanized application.Carry out granulation for raw material, have patent to propose to adopt crystallization process resemble Repone K, but the manufacturing condition harshness of crystallization process, and crystallization easily causes the disadvantage that yield is low, energy consumption is big, granule strength is low in liquid phase, is difficult to realize industrialization.On the other hand, the single element particle that extrusion process is produced is fertile irregular owing to particle shape as Repone K, vitriolate of tartar etc., and granularity is inhomogeneous, causes in Bulk Blending Fertilizer production and transportation and causes the nutrient segregation, finally influences growth and the output of farm crop.
Summary of the invention: the objective of the invention is to: by improving the adhesive property on granulation material surface, strengthen the agglomeration of pulverulent material, thereby make the granulation material be easy to balling-up, carry out granulation by disk or cylinder then, finally obtain the granulated fertilizer of single nutrient or polynary nutrient.
For achieving the above object, the present invention has adopted following technical scheme: fertilizer is selected from Repone K, one or both mixtures of vitriolate of tartar or be selected from nitrogenous fertilizer and Repone K, the mixture of one or both compositions in the vitriolate of tartar, in fertilizer, add the adhesive for granulating of its total amount 5%-50% (weight) simultaneously, the acid concentration of 3%-30% (weight) that adds its total amount is at the acidic activator of 5%-80% (weight), after granulation 5-10 minute, the 70%-90% of material (weight) gets final product balling-up, drying, cooling, just obtain epigranular after the screening, the particulate product that intensity is high.
Adhesive for granulating of the present invention can be in the middle of the lime carbonate, magnesiumcarbonate, calcium oxide, four kinds of materials of magnesium oxide one or both or two or more by arbitrary proportion blended mixture; Activator can be in phosphoric acid, sulfuric acid, the nitric acid one or both or two or more by arbitrary proportion blended mixture.
The present invention's technical scheme preferably is: the adhesive for granulating add-on of preferentially selecting 12%-25% (weight) for use.Should be noted that: the adhesive for granulating add-on is not wanted too much or very few, and when binding agent add-on very little the time, it is not enough to improve material viscosity, is difficult to balling-up, makes simultaneously that material is acid to strengthen etching apparatus.The add-on of binding agent is not too many yet, otherwise the granulated fertilizer nutrient content descends significantly, and the consumption of activator is also corresponding will increase considerably, and finally influences the cost of product.Preferentially select 7%-15% (weight) for use for the consumption of activator.As the tartaric acid consumption very little, the balling-up time is oversize; Consumption is too many, easily produces acid mist, and material viscosity is too strong, and particle easily is agglomerated into bulk, can't ordinary production.The preferred 5%-30% of the acid concentration of activator (weight).
Embodiment: by the following examples, method of the present invention is described.
Embodiment one, granule potassium chloride
Measure raw material by following proportioning:
1. adhesive for granulating 80% is crossed 60 purpose lime carbonate 600kg
2. Repone K K
260 order 4200kg are crossed in O 〉=60%, 80%
3. the sulfuric acid 300kg of activator concentration 20%
The powdery Repone K that will meet aforementioned proportion with send into the granulation dish after powder lime carbonate is mixed, with 0.28m
3The dilute sulphuric acid that the flow of/h adds 20% concentration carries out granulation.Deliver to drying machine behind the 7min, dry under 200-400 ℃ temperature, the dry gas temperature out is controlled at 60-80 ℃, through cooling, sieve finished particle Repone K 4.0t, a balling ratio 80% (particle diameter is 1-4.75mm), particle nutrient: 48.0% (K
2O%), granule strength is 9.0N/.
Embodiment two, particle N-K binary fertilizer
Measure raw material by following proportioning:
1. adhesive for granulating 80% is crossed 100 purpose ground dolomite 750kg
2. Repone K K
260 order 3000kg are crossed in O% 〉=60%, 80%
3. ammonium chloride N% 〉=23% 1300kg
4. the nitration mixture of activator concentration 25% (sulfuric acid ten phosphoric acid) 400kg
Adhesive for granulating with after ammonium chloride, Repone K mix, is delivered to the cylinder tablets press, in cylinder, spray into rare nitration mixture (flow 0.33m simultaneously
3/ h), after granulation, the wet bulb material is delivered to oven dry in the drying machine, and the gas feed temperature is 300 ℃ in the drying machine, and temperature out is 70 ℃, gets product through cooling, screening then.Greater than 8.0N/, the particle nutrient is (N-6, K greater than 50.0% (particle diameter 1-4.75mm) granule strength for balling ratio
2O-14).
The invention has the advantages that: the one, production technology is simple, and raw material is easy to get and wide adaptability, does not need Want steam to carry out granulation, product granularity is even, particle rounding, suitable for making bulk blended fertilizer. The present invention Another advantage be that adhesive for granulating and activator can be crops the nutritional labelings such as Ca, Mg, S and even N, P are provided, improved the comprehensive nutrient ability of granulated fertilizer, favourable to crop growth.
Claims (4)
1. granular potash fertilizer, the manufacture method of granule nitrogen and potassium fertilizer, the fertilizer that it is characterized in that it is selected from Repone K, one or both mixtures of vitriolate of tartar or be selected from nitrogenous fertilizer and Repone K, the mixture of one or both compositions in the vitriolate of tartar, in fertilizer, add adhesive for granulating and acidic activator simultaneously, wherein adhesive for granulating is a lime carbonate, magnesiumcarbonate, calcium oxide, in the magnesium oxide one or both or two or more mixtures, it accounts for total inventory 5%～50% (weight), wherein acidic activator is a phosphoric acid, sulfuric acid, in the nitric acid one or both or two or more mixtures, it accounts for total inventory 3%～30% (weight), acid concentration is in 5%～80% (weight), after the granulation 5～10 minutes, 70%～90% of material gets final product balling-up, drying, cooling, obtain even-grained granular potash fertilizer or granule nitrogen and potassium fertilizer after the screening.
2. the manufacture method of a granulated fertilizer as claimed in claim 1 is characterized in that the adhesive for granulating add-on is 12%～25% (weight) of total inventory.
3. the manufacture method of a granulated fertilizer as claimed in claim 1 is characterized in that the acidic activator add-on is 7%～15% (weight) of total inventory.
4. the manufacture method of a granulated fertilizer as claimed in claim 1 is characterized in that the acid concentration of acidic activator is controlled at 5%～30% (weight).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001332805A CN1187116C (en) | 2000-11-30 | 2000-11-30 | Process for preparing granular fertilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001332805A CN1187116C (en) | 2000-11-30 | 2000-11-30 | Process for preparing granular fertilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1356298A CN1356298A (en) | 2002-07-03 |
| CN1187116C true CN1187116C (en) | 2005-02-02 |
Family
ID=4595618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001332805A Expired - Fee Related CN1187116C (en) | 2000-11-30 | 2000-11-30 | Process for preparing granular fertilizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1187116C (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100361941C (en) * | 2004-11-05 | 2008-01-16 | 上海化工研究院 | Granule potassium chloride production method |
| CN1793064A (en) * | 2005-12-19 | 2006-06-28 | 美盛公司 | Pelletization of lemery salt |
| CN101792334B (en) * | 2010-02-10 | 2012-05-16 | 吉林市博达钾肥有限公司 | Spherical potassium chloride particle and preparation method thereof |
| CN102107127B (en) * | 2011-01-11 | 2015-04-22 | 西安蓝晓科技新材料股份有限公司 | Technology for granulating powder |
| CN102503636A (en) * | 2011-10-27 | 2012-06-20 | 山西师范大学 | Ammonium chloride agglomerating prilling method |
| CN102503634A (en) * | 2011-10-27 | 2012-06-20 | 山西师范大学 | Urea-base compound fertilizer production technique |
| CN102690144B (en) * | 2012-03-28 | 2014-03-05 | 河南力浮科技有限公司 | Method for producing granular potassium sulfate |
| CN102690143A (en) * | 2012-03-28 | 2012-09-26 | 河南力浮科技有限公司 | Method for producing granular potassium chloride |
| CN103664356A (en) * | 2013-11-25 | 2014-03-26 | 滁州华冶机电科技有限公司 | Pellet potash fertilizer pelletizing technology |
| CN103819271B (en) * | 2014-02-25 | 2016-04-27 | 湖北富邦科技股份有限公司 | A kind of manufacture method of novel particle Repone K fertilizer |
| CN104150970B (en) * | 2014-07-15 | 2017-07-28 | 湖北富邦科技股份有限公司 | A kind of disc granulation method of particle ammonium magnesium phosphate slow-release fertilizer |
| CN104355778B (en) * | 2014-09-26 | 2017-02-15 | 成都新柯力化工科技有限公司 | Potassium fertilizer granules and granulating method thereof |
| CN106278609A (en) * | 2016-08-15 | 2017-01-04 | 湖北富邦科技股份有限公司 | A kind of low concentration Multi-functional circular granular potash fertilizer and preparation method |
| CN107082731A (en) * | 2017-03-14 | 2017-08-22 | 成都云图控股股份有限公司 | A kind of prilling process of particle nitrogen fertilizer |
| CN108033862B (en) * | 2018-01-04 | 2021-04-13 | 中化农业（临沂）研发中心有限公司 | Preparation method of novel high-strength round granular potassium sulfate |
| 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 |
| CN113105281A (en) * | 2021-04-23 | 2021-07-13 | 湖北富邦科技股份有限公司 | Method for producing round particle potash fertilizer |
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2000
- 2000-11-30 CN CNB001332805A patent/CN1187116C/en not_active Expired - Fee Related
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| CN1356298A (en) | 2002-07-03 |
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