CN1365959A - Process for preparing high-concentration compound N-P-K fertilizer by tower-type granulating - Google Patents
Process for preparing high-concentration compound N-P-K fertilizer by tower-type granulating Download PDFInfo
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- CN1365959A CN1365959A CN 02103008 CN02103008A CN1365959A CN 1365959 A CN1365959 A CN 1365959A CN 02103008 CN02103008 CN 02103008 CN 02103008 A CN02103008 A CN 02103008A CN 1365959 A CN1365959 A CN 1365959A
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- zeolite
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Abstract
A process for preparing high-concentration N-P-K compound fertilizer by tower-type granulating includes such steps as fusing urea to obtain liquid, adding K- and P-contained powder, mixing and stirring to produce melt slurry the mentioned K-contained powder being potassium chloride or sulfate powder, its main feature as following: adding auxiliary material calcium carbonate to melt slurry containing potassium chloride and adding zeolite to melt slurry containing potassium sulfate. Its advantages are high rate of finished product (more than 95%) and high yield-increasing effect (15%, 17% and 15% for corn, wheat and vegetable respectively).
Description
Technical field
The invention belongs to the chemical technique field, relate to the method that a kind of tower granulation is produced high-concentration compound N-P-K fertilizer.
Background technology
China produces NPK composite fertilizer and all adopts the granulating method production technique at present; comprise disk granulation, extruder grain, drum granulating etc.; wherein urine spray drum granulating is the most up-to-date techniques of the NPK of production high density in recent years composite fertilizer; it is to be solid phase with phosphorus, potassium raw material; spray adding urine makes it to roll and is shaped in rotary drum granulator; owing to must possess the solid phase of enough " granule " in this method, thus provide the nitrogen content of liquid phase must be controlled at interior very among a small circle and content enough low, generally with N: P
2O
5: K
2O=1: be main at 1: 1, as Industrial products 15-15-15, in fact the growth demand of crop is still based on nitrogen, and such proportional range does not fit into the requirement of various crops or various regions soil regime, according to detecting, the average demand of N, P, K was the best with 1: 0.6: 0.35 in China's fertilizer, simultaneously, this technology particle balling preparation degree is poor, and satisfactory balling ratio is low, and the returning charge that also must possess more than 30% can granulation, and its yield rate only reaches 50-70%.
The principle of tower granulation production high density NPK composite fertilizer is to add phosphorus, potassium powder in the fused solution of urea, form a kind of mixture of eutectoid point, after mixing certain hour, directly leak in the rotary nozzle of tablets press and carry out granulation, as described in Chinese patent CN99127008.8, still, this technology of producing NPK composite fertilizer, its defective is: 1) mixed slurry does not possess enough surface tension, causes shaping bad; 2) viscosity of mixed slurry is excessive, thereby stops up shower nozzle; 3) three kinds of raw materials mix back generation chemical reaction, cause the ammonia loss excessive.
Summary of the invention
The objective of the invention is to overcome the defective of above-mentioned prior art, provide a kind of shaping well, the method that yield rate is high and tower granulation granulation continuously is produced high-concentration compound N-P-K fertilizer.
Technical scheme of the present invention is as follows:
A kind of tower granulation is produced the method for high-concentration compound N-P-K fertilizer, promptly in the fused solution of urea, add phosphorous, contain the potassium powder, mix, stirred 4-8 minute, generate molten slurry, slurry temperature is 115-130 ℃, above-mentioned phosphorous powder is a monoammonium phosphate, containing the potassium powder is Repone K or vitriolate of tartar, urea, monoammonium phosphate, the additional proportion of Repone K or vitriolate of tartar is 2-4: 1-2: 1 (weight ratio), it is characterized in that: in above-mentioned molten slurry, also add auxiliary material lime carbonate or zeolite, described lime carbonate joins in the molten slurry that contains Repone K, and zeolite joins in the molten slurry of sulfur acid potassium;
The add-on of above-mentioned lime carbonate is the 5-10% of total raw material amount, and the add-on of zeolite is the 10-20% of total raw material amount.
Above-mentioned mixing, churning time were controlled at 4-8 minute, and the time that prevents is too short, caused and mixed inequality, and overlong time produces and puts ammonia react.
All the other powders in present method except that urea all need be crushed to about 60 orders, prevent the excessive obstruction spray nozzle of particle, and particle is too small should not to be mixed with urine.
Principle of the present invention is: the potassium source comes from Repone K or vitriolate of tartar in present method, because the difference of Repone K and vitriolate of tartar physical properties aspect, the material properties difference that causes slip: it is little 1) to contain the slip viscosity of Repone K, dispersity is big, the drip gauge surface tension is little, and material thermal conductivity difference, cause the granulation difficulty, be prone to hollow bead, so adding, the present invention has highly close-burning lime carbonate in containing the slip of Repone K, can effectively remedy the deficiency of above-mentioned major ingredient, improve the material granulation performance, improve balling ratio and yield rate; 2) the slip viscosity of sulfur acid potassium is big, dispersity is little, the drip gauge surface tension is big, easily be shaped, but excessive, very easily stop up spray nozzle and can't continue granulation because of its viscosity, therefore, the present invention adds cohesiveness in the slip of sulfur acid potassium little, and the zeolite powder that dispersity is bigger can effectively improve the material granulation performance, guarantee granulation process smooth and easy carrying out continuously, simultaneously, because zeolite powder as soil structure improved addictive matrix and slow release fertilizer matrix, has crucial effect for improving the supply situation of soil nutrient to plant, and in soil, use, can not cause available phosphorus and water-soluble phosphorus fixation, improve the Soil Potassium situation, effectively improve fertilizer efficiency.
But present method production high density NPK composite fertilizer, the main products specification is: 1) make potassium source: 24-12-6,24-12-12,25-10-10 with Repone K; 2) make potassium source: 24-12-6 with vitriolate of tartar.
Experimental results show that, present method is to the equal energy of above-mentioned prescription continuous production, its particle balling preparation degree is good, surface gloss is good, yield rate can reach more than 95%, this product is used in farm crop such as corn, wheat, vegetables respectively, and than homemade 15-15-15 specification composite fertilizer volume increase 15%, 17%, 15%, effect is obvious respectively.
Following table is N-P
2O
5-K
2O=25: 10: 10 quality inspection report, detect by quality of chemical products supervision and inspection station, Ningxia Hui Autonomous Region, detect and number be: No. 121, (2001) chemical industry station searching the 2001st committee:
| Sequence number | Interventions Requested | Technical indicator | Assay | Individual event is judged |
| ????1 | Effective Vanadium Pentoxide in FLAKES (P 2O 5) content % | ????11.47 | ||
| ????2 | Total nitrogen (N) content % | ????24.45 | ||
| ????3 | Potassium oxide (K 2O) content % | ????10.46 | ||
| ????4 | Total oxygen branch (N+P 2O 5+K 2O) content % 〉= | ????45 | ????46.38 | Qualified |
| ????5 | Water-soluble phosphorus accounts for available phosphorus percentage % | ????50 | ????85.26 | Qualified |
| ????6 | Moisture %≤ | ????2.5 | ????1.3 | Qualified |
| ????7 | The average anti-crushing power of particle (2.00-2.80mm) N 〉= | ????6 | ????9.4 | Qualified |
| ????8 | Granularity (1.00-4.75mm) percentage % 〉= | ????90 | ????99 | Qualified |
Embodiment
Embodiment 1:
Get monoammonium phosphate (MAP) 21.0kg that is crushed to about 60 orders, Repone K (KCl) 19.8kg, lime carbonate (CaCO
3) the 9.7kg powder; join in the fusing urea solution of 49.5kg after mixing, the dry intensification; fully stirred 5 minutes; keeping slurry temperature is 118 ℃; then melting charge slurry is leaked in the rotary nozzle on the tower type pelletizer top, granulation and cooling, qualified particle is high density NPK composite fertilizer; product specification is: 25-10-10, product contained humidity 1.3%, the average anti-crushing power 9.4N of particle, yield rate 99%.
Embodiment 2
Get monoammonium phosphate (MAP) 25.1kg that is crushed to about 60 orders, Repone K (KCl) 23.8kg, lime carbonate (CaCO
3) the 4.7kg powder; join in the fusing urea solution of 46.4kg after mixing, the dry intensification; fully stirred 8 minutes, keeping slurry temperature is 118 ℃, then melting charge slurry is leaked in the rotary nozzle on the tower type pelletizer top; granulation and cooling; qualified particle is high density NPK composite fertilizer, and product specification is: 24-12-12, after testing; every index is all qualified, and yield rate reaches more than 98%.
Embodiment 3
Get monoammonium phosphate (MAP) 25.1kg that is crushed to about 60 orders, Repone K (KCl) 11.9kg, lime carbonate (CaCO
3) the 16.6kg powder; join in the fusing urea solution of 46.4kg after mixing, the dry intensification; fully stirred 6 minutes, keeping slurry temperature is 116 ℃, then melting charge slurry is leaked in the rotary nozzle on the tower type pelletizer top; granulation and cooling; qualified particle is high density NPK composite fertilizer, and product specification is: 24-12-6, after testing; every index is all qualified, and yield rate reaches more than 98%.
Embodiment 4
Get monoammonium phosphate (MAP) 25.1kg that is crushed to about 60 orders; Repone K (KCl) 12.2kg; zeolite powder 16.3kg powder; join in the fusing urea solution of 46.4kg after mixing, the dry intensification; fully stirred 6 minutes; keeping slurry temperature is 125 ℃; then melting charge slurry is leaked in the rotary nozzle on the tower type pelletizer top; granulation and cooling; qualified particle is high density NPK composite fertilizer, and product specification is: 24-12-6, after testing; every index is all qualified, and yield rate reaches more than 98%.
Claims (2)
1. a tower granulation is produced the method for high-concentration compound N-P-K fertilizer, promptly in the fused solution of urea, add phosphorous, contain the potassium powder, mixed 4-8 minute, generate molten slurry, slurry temperature is 115-130 ℃, above-mentioned phosphorous powder is a monoammonium phosphate, containing the potassium powder is Repone K or vitriolate of tartar, urea, monoammonium phosphate, the additional proportion of Repone K or vitriolate of tartar is 2-4: 1-2: 1 (weight ratio), it is characterized in that: in above-mentioned molten slurry, also add auxiliary material lime carbonate or zeolite, described lime carbonate joins in the molten slurry that contains Repone K, and zeolite joins in the molten slurry of sulfur acid potassium.
2. by the method for the described tower granulation production of claim 1 high-concentration compound N-P-K fertilizer, it is characterized in that: the add-on of above-mentioned lime carbonate is the 5-10% of total raw material amount, and the add-on of zeolite is the 10-20% of total raw material amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021030081A CN1182085C (en) | 2002-01-31 | 2002-01-31 | Process for preparing high-concentration compound N-P-K fertilizer by tower-type granulating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021030081A CN1182085C (en) | 2002-01-31 | 2002-01-31 | Process for preparing high-concentration compound N-P-K fertilizer by tower-type granulating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1365959A true CN1365959A (en) | 2002-08-28 |
| CN1182085C CN1182085C (en) | 2004-12-29 |
Family
ID=4739796
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021030081A Expired - Fee Related CN1182085C (en) | 2002-01-31 | 2002-01-31 | Process for preparing high-concentration compound N-P-K fertilizer by tower-type granulating |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100383091C (en) * | 2004-12-27 | 2008-04-23 | 上海化工研究院 | Granulating Method in tower type for producing complex fertilizer of nitrogen, phosphor and potass |
| CN102030592A (en) * | 2010-11-10 | 2011-04-27 | 张超 | Tower-granulated low-nitrogen high-phosphorus urine sulfur radical compound fertilizer and preparation method thereof |
| CN101440004B (en) * | 2008-12-22 | 2012-02-15 | 张超 | Method for preparing high tower control release compound fertilizer |
| CN108251127A (en) * | 2014-11-20 | 2018-07-06 | 北京八亿时空液晶科技股份有限公司 | Liquid crystal compound containing difluoromethoxy bridge bond and application thereof |
| CN108998045A (en) * | 2018-07-10 | 2018-12-14 | 长沙浩然医疗科技有限公司 | Concave convex rod soil conditioner and preparation method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101759478B (en) * | 2009-12-24 | 2012-08-29 | 成都市新都化工股份有限公司 | Preparation method of compound fertilizer |
-
2002
- 2002-01-31 CN CNB021030081A patent/CN1182085C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100383091C (en) * | 2004-12-27 | 2008-04-23 | 上海化工研究院 | Granulating Method in tower type for producing complex fertilizer of nitrogen, phosphor and potass |
| CN101440004B (en) * | 2008-12-22 | 2012-02-15 | 张超 | Method for preparing high tower control release compound fertilizer |
| CN102030592A (en) * | 2010-11-10 | 2011-04-27 | 张超 | Tower-granulated low-nitrogen high-phosphorus urine sulfur radical compound fertilizer and preparation method thereof |
| CN102030592B (en) * | 2010-11-10 | 2013-01-30 | 张超 | Tower-granulated low-nitrogen high-phosphorus urine sulfur radical compound fertilizer and preparation method thereof |
| CN108251127A (en) * | 2014-11-20 | 2018-07-06 | 北京八亿时空液晶科技股份有限公司 | Liquid crystal compound containing difluoromethoxy bridge bond and application thereof |
| CN108998045A (en) * | 2018-07-10 | 2018-12-14 | 长沙浩然医疗科技有限公司 | Concave convex rod soil conditioner and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN1182085C (en) | 2004-12-29 |
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| C10 | Entry into substantive examination | ||
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| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NINGXIA FENGYOU CHEMICAL ENGINEERING CO., LTD. Free format text: FORMER OWNER: ZHOU JIANJUN Effective date: 20061027 |
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Effective date of registration: 20061027 Address after: 750021 No. 750 West Beijing Road, Xixia District, the Ningxia Hui Autonomous Region, Yinchuan Patentee after: Ningxia Fengyou Chemical Co., Ltd. Address before: 750021, 38 West Beijing Road, Xinshi District, the Ningxia Hui Autonomous Region, Yinchuan Patentee before: Zhou Jianjun |
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| C56 | Change in the name or address of the patentee |
Owner name: NINGXIA KAIYUAN FENGYOU CHEMICAL CO., LTD. Free format text: FORMER NAME OR ADDRESS: NINGXIA FENGYOU CHEMICAL ENGINEERING CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: No. 750 West Beijing Road, Xixia District, the Ningxia Hui Autonomous Region, Yinchuan Patentee after: Ningxia Kaiyuan Huafeng Chemical Limited by Share Ltd Address before: No. 750 West Beijing Road, Xixia District, the Ningxia Hui Autonomous Region, Yinchuan Patentee before: Ningxia Fengyou Chemical Co., Ltd. |
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Granted publication date: 20041229 Termination date: 20110131 |