CN102249766A - Manufacture method of particle potash fertilizer - Google Patents
Manufacture method of particle potash fertilizer Download PDFInfo
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- CN102249766A CN102249766A CN2010101758920A CN201010175892A CN102249766A CN 102249766 A CN102249766 A CN 102249766A CN 2010101758920 A CN2010101758920 A CN 2010101758920A CN 201010175892 A CN201010175892 A CN 201010175892A CN 102249766 A CN102249766 A CN 102249766A
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- potash fertilizer
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Abstract
The invention provides a manufacture method of a particle potash fertilizer. A potash fertilizer qualified finished product with a particle size of 2-5.6mm is prepared by tabletting, drying, fragmentation, granulation and screening, with powdered potash fertilizer produced by a water-salt method as the raw material. The raw material powdered potash fertilizer has a water content less than 4.0%. A pressure roller gap of a tablet machine needs to be adjusted to control a tabletting thickness during tabletting and granulation; a depth of a roller skin pattern groove of a pressure roller is 5-8mm; a long shaft is 45-50mm; a short shaft is 35-45mm; and a pressure of a pressure roller wire is no less than 5KN/cm. A turn-over type of dryer is employed for drying with a temperature controlled lower than 220 DEG C and a water content lower than 1.5%. A roller gap of a crusher is adjusted to 3-8mm during fragmentation. After granulation, particles need to be graded; particles with a particle size less than 2mm are recovered to the tabletting step for further treatment, and particles with a particle size larger than 5.6mm are recovered to the fragmentation step for further treatment until having a qualified particle size. During screening, a first screen has a mesh count of 3-5 mesh, and a second screen has a mesh count of 17-19 mesh. Fragmented particles are granulated by a granulator to have smooth edges, so as to reduce powder generated during transportation.
Description
Technical field
The present invention relates to the manufacturing of granular potash fertilizer, be applicable to salt-water system production, this method is especially at the granulation of potash fertilizer such as Repone K, vitriolate of tartar, potash magnesium sulphate fertilizer.
Background technology
Along with soil testing and fertilizer recommendation in the agriculture production, broad application such as rational application of fertilizers, granular potash fertilizer is increasing the market requirement year by year because of characteristics such as it are used conveniently, fertilizer efficiency period is long.
At present, the manufacture method of domestic granular potash fertilizer mainly contains following several: (1) adds invalid components such as tackiness agent (being generally bentonite), water in powdery potash fertilizer, adopts granulating method (rotating cylinder granulating disc) or Squeezinggranulator granulation; The defective that its method exists: 1. add invalid components such as tackiness agent (being generally bentonite), water,, lowered the effective content of potassium oxide in the potash fertilizer though help the potash fertilizer granulation; 2. granular potash fertilizer moisture content can not effectively be controlled, and is excessive as moisture content, can reduce granular potash fertilizer moisture content hardness, at the powder that stores, the transportation generation is more, directly influences the particle diameter index of granular potash fertilizer; 3. Squeezinggranulator is because pressure roller pressure is big, and the pressure roller wearing and tearing are very fast, and equipment failure is more; 4. single machine yield is low, is unfavorable for large-scale production; (2) adopt recrystallization method, after the potash fertilizer dissolving, the granular potash fertilizer of crystallization and then system again; The defective that its method exists: 1. need finish the process of dissolving, filtration, crystallization again, oven dry, the energy consumption height, cost is big; 2. recrystallization process complex process, process control difficulty are bigger.Literature search has also disclosed the manufacture method that " the granular potassium sulfate new process of production " the fertile company limited of Shandong Junan County Da Er specialization Li Ming river, Chen Dirong delivered in the 28th 2 phases of volume of in February, 2006 " inorganic chemicals industry " also comprised above-mentioned granular potash fertilizer.Above-mentioned two kinds of methods, all effective way of the granular potash fertilizer particle diameter not being adjusted.
Prilling process provided by the invention, need not water-soluble recrystallization granulation, also need not to add the additive bonded pelleting, under the condition of control moisture requirement up to specification, use the roller skin that compression molding of pressure roller of special groove is arranged, after drying, fragmentation, whole grain, the screening, obtain the satisfactory granular potash fertilizer of particle diameter, realized the design objective that pressure is low, compressing tablet output big, the granular potash fertilizer particle diameter is even, energy consumption is low, the deep processing production technique of sylvite is improved.
Summary of the invention
The objective of the invention is to: the manufacture method of granular potash fertilizer is provided, and through operations such as compressing tablet, oven dry, fragmentation, whole grain, screenings, it has that energy consumption is low, cost is low, output is big and is supporting with the potash fertilizer production line, realizes granular potash fertilizer industrial continuous production characteristics.
The object of the present invention is achieved like this: a kind of manufacture method of granular potash fertilizer, and the powdery potash fertilizer of producing with water salt method is raw material, and the step of pressing tablet, drying, fragmentation, whole grain, screening is implemented, and promptly getting particle diameter is the qualified finished product of the potash fertilizer of 2-5.6mm;
Water ratio＜4.0% of its 1 raw material powdery potash fertilizer;
The thickness of compressing tablet is controlled in the gap that need adjust the tabletting machine pressure roller during its 2 compressing tablet granulation, and the degree of depth of its pressure roller roller ginned cotton line groove is 5-8mm, and major axis is 45-50 mm, and minor axis is 35-45 mm; The pressure roller linear pressure is not less than 5KN/cm;
Its 3 temperature when dry is controlled to be＜and 220 ℃, water ratio is controlled to be＜and 1.5%;
The clearance between roll of its 4 crushers when broken is adjusted into 3-8mm and gets final product;
Its 5 whole grain back particle needs classification, and particle diameter＜2mm is recovered to the compressing tablet step to be continued to dispose, and particle diameter＞5.6mm is recovered to broken step to be continued to dispose, qualified until particle diameter;
One sieve number of trommel extension set is the 3-5 order during its 6 screening, and secondary screen mesh number is the 17-19 order.
The manufacture method of described granular potash fertilizer, whole grain makes the corner angle of crushed particles level and smooth, reduces fricative powder in the transportation.
The manufacture method of described granular potash fertilizer, the dryer of selecting for use are the turnover plate type dryer.
The outstanding feature of the inventive method is: made full use of moisture that material self carries secretly and salts substances easy compacting, the easy characteristic of caking, when extrusion molding, can reduce squeeze pressure, reduce energy consumption, prolonged work-ing life of pressure roller, because frictional heat in the extrusion process, can transpiring moisture, improve moulding compressing tablet surface tension etc.
The present invention specifically implements way, increases extrusion process on the salt-water system technology chain of sylvite industry, and is auxiliary with technologies such as fragmentation, whole grain, screenings, promptly applicable to the manufacturing of various granular potash fertilizer products.
Prilling process of the present invention is the improvement to sylvite manufacturing salt-water system technology, and the potash fertilizer industry quantity-produced characteristics of realization are very effective, both cut down the consumption of energy, and improved output again, show technical progress.
Description of drawings
Accompanying drawing is the schematic flow sheet of granular potash fertilizer manufacturing process.
Embodiment
Embodiment
The manufacture method of granular potassium sulfate:
The powdered potassium sulfate of producing with water salt method is a raw material, and the manufacturing step of pressing tablet, drying, fragmentation, whole grain, screening is implemented, and promptly getting particle diameter is the granular potassium sulfate product of 2-5.6mm;
1. the water ratio of raw material powdery potash fertilizer＜4.0% is sent into tabletting machine; Need adjust the gap of tabletting machine pressure roller during compressing tablet and control compressing tablet thickness, its pressure roller roller skin depth of groove is 5mm, and being shaped as major axis is that 47mm, minor axis are the ellipse of 40 mm; The pressure roller linear pressure is not less than 5KN/cm;
2. the sheet vitriolate of tartar is sent into quasi-static chain-plate type drying machine drying drying, temperature is controlled to be＜220 ℃, and water ratio is controlled to be＜and 1.5%;
3. moisture content is qualified sheet vitriolate of tartar is sent into the fine crusher fragmentation, and broken clearance between roll is adjusted into 5mm and gets final product;
4. send into the classification of the whole grain of pelletizing machine through the ground grains vitriolate of tartar, particle diameter＜2mm is recovered to the compressing tablet step to be continued to dispose, and particle diameter＞5.6mm is recovered to broken step to be continued to dispose, qualified until particle diameter.
5. the granular potash fertilizer behind the whole grain is sent into the trommel extension set and is sieved, and one grit number of trommel extension set is 4 orders during screening, and secondary screen order number is 18 orders.
The 1. middle tabletting machine pressure roller diameter of step can be selected the scope tabletting machine of pressure roller diameter at 800-1050 mm as required.
The purpose of the whole grain of the 4. middle pelletizing machine of step is to eliminate the rib point of broken back granular potassium sulfate, makes it smoothly, reduces transportation because of fricative powder.
The order number of 5. middle one sieve number of trommel extension set of step and secondary screen net can require adjust according to the particle diameter of standard to granular potash fertilizer.
Claims (3)
1. the manufacture method of a granular potash fertilizer is characterized in that: the powdery potash fertilizer of producing with water salt method is raw material, and the step of pressing tablet, drying, fragmentation, whole grain, screening is implemented, and promptly getting particle diameter is the qualified finished product of the potash fertilizer of 2-5.6mm;
Water ratio＜4.0% of its 1 raw material powdery potash fertilizer;
The thickness of compressing tablet is controlled in the gap that need adjust the tabletting machine pressure roller during its 2 compressing tablet granulation, and the degree of depth of its pressure roller roller ginned cotton line groove is 5-8mm, and major axis is 45-50 mm, and minor axis is 35-45 mm; The pressure roller linear pressure is not less than 5KN/cm;
Its 3 temperature when dry is controlled to be＜and 220 ℃, water ratio is controlled to be＜and 1.5%;
The clearance between roll of its 4 crushers when broken is adjusted into 3-8mm and gets final product;
Its 5 whole grain back particle needs classification, and particle diameter＜2mm is recovered to the compressing tablet step to be continued to dispose, and particle diameter＞5.6mm is recovered to broken step to be continued to dispose, qualified until particle diameter;
One sieve number of trommel extension set is the 3-5 order during its 6 screening, and secondary screen mesh number is the 17-19 order.
2. according to the manufacture method of right 1 described granular potash fertilizer, it is characterized in that: whole grain makes the corner angle of crushed particles level and smooth, reduces fricative powder in the transportation.
3. according to the manufacture method of right 1 described granular potash fertilizer, it is characterized in that: the dryer of selecting for use is the turnover plate type dryer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101758920A CN102249766A (en) | 2010-05-18 | 2010-05-18 | Manufacture method of particle potash fertilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101758920A CN102249766A (en) | 2010-05-18 | 2010-05-18 | Manufacture method of particle potash fertilizer |
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| CN102249766A true CN102249766A (en) | 2011-11-23 |
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| CN2010101758920A Pending CN102249766A (en) | 2010-05-18 | 2010-05-18 | Manufacture method of particle potash fertilizer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108558492A (en) * | 2018-02-28 | 2018-09-21 | 广东信澳化肥有限公司 | A kind of potash fertilizer anti-caking production technology |
| CN109956763A (en) * | 2017-12-25 | 2019-07-02 | 中蓝连海设计研究院有限公司 | A kind of method and potassium sulfate prilling process improving granular potassium sulfate intensity |
| CN109956823A (en) * | 2019-04-25 | 2019-07-02 | 郑州大学 | A kind of production method of potassium sulfate fertilizers particle |
| CN113164970A (en) * | 2018-11-23 | 2021-07-23 | 艾斯尔欧洲合作社公司 | Compacted polyhalite and process for producing same |
| US12017198B2 (en) | 2018-02-27 | 2024-06-25 | Dead Sea Works Ltd. | Potash dust granulation process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85104005A (en) * | 1984-02-28 | 1986-11-19 | 窒素股份有限公司 | The dry process of the vitriolate of tartar that generated by Repone K and sulfuric acid is used to neutralize |
| CN87105366A (en) * | 1986-07-30 | 1988-02-10 | 窒素公司 | Granular potassium sulfate and method for producing same |
| CN1541984A (en) * | 2003-11-07 | 2004-11-03 | 丁振全 | Potassium-added synergistic urea and preparation method thereof |
-
2010
- 2010-05-18 CN CN2010101758920A patent/CN102249766A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85104005A (en) * | 1984-02-28 | 1986-11-19 | 窒素股份有限公司 | The dry process of the vitriolate of tartar that generated by Repone K and sulfuric acid is used to neutralize |
| CN87105366A (en) * | 1986-07-30 | 1988-02-10 | 窒素公司 | Granular potassium sulfate and method for producing same |
| CN1541984A (en) * | 2003-11-07 | 2004-11-03 | 丁振全 | Potassium-added synergistic urea and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 历明川: "颗粒硫酸钾生产新工艺", 《无机盐工业》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109956763A (en) * | 2017-12-25 | 2019-07-02 | 中蓝连海设计研究院有限公司 | A kind of method and potassium sulfate prilling process improving granular potassium sulfate intensity |
| US12017198B2 (en) | 2018-02-27 | 2024-06-25 | Dead Sea Works Ltd. | Potash dust granulation process |
| CN108558492A (en) * | 2018-02-28 | 2018-09-21 | 广东信澳化肥有限公司 | A kind of potash fertilizer anti-caking production technology |
| CN113164970A (en) * | 2018-11-23 | 2021-07-23 | 艾斯尔欧洲合作社公司 | Compacted polyhalite and process for producing same |
| CN109956823A (en) * | 2019-04-25 | 2019-07-02 | 郑州大学 | A kind of production method of potassium sulfate fertilizers particle |
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Application publication date: 20111123 |