CN104108969A - Granulation method of phosphorus-potassium nitrate fertilizer - Google Patents
Granulation method of phosphorus-potassium nitrate fertilizer Download PDFInfo
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Abstract
The invention relates to a granulation method of a phosphorus-potassium nitrate fertilizer, which mainly comprises the following steps: uniformly mixing a phosphate fertilizer and a nitrophospate fertilizer at 145-165 DEG C to obtain a slurry; uniformly mixing a potassium fertilizer with the slurry at 140-155 DEG C to obtain a mixed slurry, wherein the temperature of the step (2) is lower than that of the step (1); and spraying the mixed slurry to obtain phosphorus-potassium nitrate fertilizer granules, wherein the nitrophospate fertilizer is a nitrophospate slurry which is prepared by heating finished nitrophospate granules, nitrophospate return grains or nitrophospate neutralization concentrated solution at 135-190 DEG C. The phosphorus-potassium nitrate fertilizer product obtained by the method has the advantages of uniform particle, high smoothness, high strength and adjustable nutrients according to needs, has acicular molten pores, and has higher market competitiveness.
Description
Technical field
The present invention relates to chemical industry composting technical field, particularly a kind of granulation process of phosphorus-potassium nitrate fertilizer.
Background technology
At present in China's chemical industry composting technical field, without high tower phosphorus-potassium nitrate fertilizer manufacturing process.Denomination of invention is that the drying means that the method for decomposing phosphorite by using nitric acid phosphorus-potassium nitrate fertilizer coproduction processed phosphoric acid calcium carbonate, Chinese patent application that publication number is CN103524151A relate to is conventional production process, prepared phosphorus-potassium nitrate fertilizer product strength is low, formula can be controlled narrow range, and product appearance particle consistence is slightly poor.The present invention uses complete feed slurry high tower prilling technology and Phosphate Fertilizer Production technique to combine, utilize the content of potassium in potassium sulfate, Repone K, saltpetre supplemental production, utilize the content of phosphorus in monoammonium phosphate, diammonium phosphate, fused(calcium magnesium)phosphate, calcium superphosphate, double superhosphate supplemental production, and use other stopping composition formulated product N, P, K content ratio, outside the NPK composite fertilizer producing, go sightseeing circle, intensity is high, the adjustable space of nutrient is large, has the higher market competitiveness.
Summary of the invention
The present invention mainly puts forth effort to solve the problem that phosphorus-potassium nitrate fertilizer outward appearance particle consistence is poor, product moisture is higher that traditional phosphorus-potassium nitrate fertilizer common process is produced.YiNPK composite fertilizer's high tower prilling technology of the present invention and nitrophosphate fertilizer traditional processing technology combine; by by nitrophosphate fertilizer and concentrated solution or common process nitrophosphate fertilizer product and nitrophosphate fertilizer returning charge melting; then add successively phosphate fertilizer and potash fertilizer; melting also mixes; evaporation section moisture in melting process; through emulsor, again stir; mixed slurry flow to high tower granulator spray basket; through tablets press again granulation; gained phosphorus-potassium nitrate fertilizer product moisture is low, intensity is high, light circularity is good, product has aperture, soluble.
It is complete feed slurry high tower prilling technique that the present invention adopts prilling process, so the space of fertilizer nutrient allotment is large, and the controlled nutrient scope of nitrogen is 10%～30%, and the controlled nutrient scope of phosphorus is 5%～45%, and the controlled nutrient scope of potassium is 0%～45%.
The object of the invention is achieved through the following technical solutions.
A granulation process for phosphorus-potassium nitrate fertilizer, comprises the following steps:
(1), at 145～165 ℃, phosphate fertilizer is mixed and obtains slip with nitrophosphate fertilizer;
(2) at 140～155 ℃, potash fertilizer is mixed with slip, obtain mixed slurry, the temperature of step (2) is lower than the temperature of step (1);
(3) spray mixed slurry, obtain phosphorus-potassium nitrate fertilizer particle;
Described nitrophosphate fertilizer is by nitrophosphate fertilizer finished particle, nitrophosphate fertilizer returning charge particle or nitrophosphate fertilizer and the nitrophosphate fertilizer slip that obtains after 135～190 ℃ of heating of concentrated solution.
Because nitrophosphate fertilizer first obtains high temperature 135～190 ℃ of heating, the coil pipe or the adjoining pipe that when therefore step 1 is mixed nitrophosphate fertilizer slip with phosphate fertilizer, heat use only need provide a small amount of heat insulation, without expending large energy, phosphate fertilizer, without prior melting, runs into the melting of high temperature slip phosphate fertilizer.
Step 2 potash fertilizer directly adds in high temperature slip, runs into the melting of high temperature slip, and potash fertilizer adds without being heated to be molten state, and the coil pipe of heating use or adjoining pipe are also only to provide a small amount of heat insulation.
The temperature of step (2) is lower than the temperature of step (1), and step 2 can, by temperature more than the slip of step 1, provide a small amount of heat or heating hardly.
Described nitrophosphate fertilizer finished particle is the nitrophosphate fertilizer product obtaining after granulation with concentrated solution in nitrophosphate fertilizer.The preferred biaxial granulation machine of granulation mode, rotary drum granulator, granulating disc or oil bath tablets press.
Described nitrophosphate fertilizer returning charge particle is in nitrophosphate fertilizer and the returning charge particle that obtain of concentrated solution after granulation, screening.The preferred biaxial granulation machine of granulation mode, rotary drum granulator, granulating disc or oil bath tablets press.
Preferably, in described nitrophosphate fertilizer, comprise the following steps with the preparation method of concentrated solution: the first step, nitric acid and phosphorus ore reaction make acid hydrolysis solution; Second step, filters; The 3rd step, the clear liquid after filtration is through freezing and crystallizing crystallization body; The 4th step, removes xln; The 5th step, logical ammonia carries out neutralization reaction with the clear liquid of removing crystal; The 6th step, after neutralization, to carry out the multistage concentrated mass percent that makes be in 85%～98% nitrophosphate fertilizer and concentrated solution to slip.
Preferably, described sprinkling mixed slurry is that rotary nozzle by high tower granulator sprays.
Preferably, described is that the tower top slip storage tank that is delivered to high tower with concentrated solution by liquid conducting pipes in nitrophosphate fertilizer is heated 135～190 ℃ of heating.
Preferably, described is that the tower top slip storage tank that nitrophosphate fertilizer finished particle and nitrophosphate fertilizer returning charge particle are delivered to high tower through lift heats 135～190 ℃ of heating.
Preferably, described melting is to adopt steam heating or electrically heated.The preferred steam coils heating of steam heating.
Preferably, after described sprinkling mixed slurry, also comprise the step that screening and surperficial anti-caking are processed.
Preferably, described phosphate fertilizer is monoammonium phosphate, diammonium phosphate, fused(calcium magnesium)phosphate, calcium superphosphate or double superhosphate, and described potash fertilizer is potassium sulfate, Repone K or saltpetre.
Preferably, also comprise the step of carrying out emulsification before spraying mixed slurry, can make slip stir, make that the phosphorus-potassium nitrate fertilizer granule strength that obtains is high and light circularity is good.
Further preferably, the nitrophosphate fertilizer slip obtaining after 135～190 ℃ of heating with concentrated solution in nitrophosphate fertilizer, more again concentrate by a whole level vaporizer, make the nitrophosphate fertilizer slurry solution of 98% concentration.
The advantage that the present invention has with respect to prior art and beneficial effect:
(1) melting charge slurry moisture content is low, without drying process, has saved energy consumption; That equipment of the present invention has is simple in structure, be easy to installation and maintenance, the feature such as cost is low.Owing to having cancelled drying process and part cooling apparatus, thereby can save the investment of dry and part cooling apparatus and operation, maintenance cost;
(2) smooth, mellow and full, the prevented from caking of particle surface, has the higher market competitiveness;
(3) good operational environment, three-waste free discharge, belongs to process for cleanly preparing.
(4) nitrophosphate fertilizer, phosphate fertilizer and potash fertilizer separate remix after two-stage melting, can make slip mix more even, and in addition, separately melting is conducive to the melting under top condition separately of phosphate fertilizer and potash fertilizer.
(5) on raw material, adopting in nitrophosphate fertilizer is the large improvement of the present invention one with the melting charge slurry of finished particle or the melting charge slurry of nitrophosphate fertilizer returning charge particle of concentrated solution, nitrophosphate fertilizer, and the product quality obtaining is high.
Accompanying drawing explanation
Fig. 1 is in nitrophosphate fertilizer and the technical process of concentrated solution high tower prilling production phosphorus-potassium nitrate fertilizer;
Fig. 2 is the technical process that conventional nitrophosphate fertilizer particle high tower prilling is produced phosphorus-potassium nitrate fertilizer;
Fig. 3 is the technical process of nitrophosphate fertilizer returning charge particle manufacture phosphorus-potassium nitrate fertilizer
Fig. 4 is the outward appearance of the phosphorus-potassium nitrate fertilizer particle of the inventive method production;
Fig. 5 is for adopting the outward appearance of the phosphorus-potassium nitrate fertilizer particle of rotary drum fluid-bed production;
Above-mentioned figure mono-: 1-flotation phosphate breeze; The nitric acid of 2-50%; 3-acid hydrolysis solution; 4-volute machine, washing drum, pressure filter; 5-insolubles; 6-clear liquid; 7-crystallizer; 8-CN filter; 9-four water-calcium nitrate; Clear liquid after 10-filters; 11-ammonia; In 12-and rear slip; 13-vaporizer; In 14-and concentrated solution; 15-tower top slip storage tank; 16-one-level tempering tank; 17-phosphate fertilizer; 18-secondary tempering tank; 19-potash fertilizer; 20-emulsor; 21-rotary nozzle; 22-solid particulate; 23-sieve apparatus 1#; 24-packing machine 1#; 25-wrapping machine 1#; 26-phosphorus-potassium nitrate fertilizer product;
Above-mentioned figure bis-: 1-flotation phosphate breeze; The nitric acid of 2-50%; 3-acid hydrolysis solution; 4-volute machine, washing drum, pressure filter; 5-insolubles; 6-clear liquid; 7-crystallizer; 8-CN filter; 9-four water-calcium nitrate; Clear liquid after 10-filters; 11-ammonia; In 12-and rear mother liquor; 13-vaporizer; In 14-and concentrated solution; 27-biaxial granulation machine; 28-chapelet; 15-tower top nitrophosphate fertilizer slip storage tank; 16-one-level tempering tank; 17-phosphate fertilizer; 18-secondary tempering tank; 19-potash fertilizer; 20-emulsor; 21-rotary nozzle; 22-solid particulate; 23-vibratory screening apparatus; 24-packing machine 1#; 25-wrapping machine 1#; 26-phosphorus-potassium nitrate fertilizer product;
Above-mentioned figure tri-: 1-flotation phosphate breeze; The nitric acid of 2-50%; 3-acid hydrolysis solution; 4-volute machine, washing drum, pressure filter; 5-insolubles; 6-clear liquid; 7-crystallizer; 8-CN filter; 9-four water-calcium nitrate; Clear liquid after 10-filters; 11-ammonia; In 12-and rear slip; 13-vaporizer; In 14-and concentrated solution; 27-biaxial granulation machine; 29-vibratory screening apparatus 2#; 30-packing machine 2#; 31-wrapping machine 2#; The low-grade nitrophosphate fertilizer product of 32-; The large and small returning charge particle of 33-; 28-chapelet; 15-tower top nitrophosphate fertilizer slip storage tank; 16-one-level tempering tank; 17-phosphate fertilizer; 18-secondary tempering tank; 19-potash fertilizer; 20-emulsor; 21-rotary nozzle; 22-solid nitric acid phosphor potassium fertilizer particle; 23-sieve apparatus 1#; 24-packing machine 1#; 25-wrapping machine 1#; 26-phosphorus-potassium nitrate fertilizer product;
Embodiment
The following example is further explanation of the present invention, and the present invention is not constituted any limitation.
Embodiment 1
The industrial nitric acid solution 2 that the first step is 50% by concentration and flotation phosphorus ore 1, by weight 2.2:1 reaction, make acid hydrolysis solution 3; Second step, acid hydrolysis solution 3 is through filtering insolubles after reaction 5 by volute machine, washing drum and plate-and-frame filter press 4; The 3rd step, the clear liquid 6 after filtration is separated out four water-calcium nitrate 9 xln through freezing and crystallizing in crystallizer 7; The 4th step, removes the four water-calcium nitrate 9 crystallizing out through CN filter 8 degree of depth; The 5th step, after logical ammonia 11 and filtration, clear liquid 10 carries out neutralization reaction; The 6th step, after neutralization, slip 12 is undertaken in the multistage concentrated NP that makes 92% concentration and concentrated solution 14 by vaporizer 13; The 7th step, in and concentrated solution 14 through high pressure pumping, a minute secondary is squeezed into 85M tower top slip storage tank 15, is heated to 170 degree slip liquid again concentrates by a level vaporizer eventually through steam coils again, makes the nitrophosphate fertilizer slurry solution of 98% concentration; The 8th step, the nitrophosphate fertilizer slurry solution of 98% concentration flow to one-level tempering tank 16 through tower top slip storage tank 15, and under the temperature condition of 165 degree, nitrophosphate fertilizer slip liquid and the extraneous phosphate fertilizer 17 adding mix, and make the complete melting of phosphate fertilizer; The 9th step, the slip liquid after melting mixing flow to secondary tempering tank 18 by upflow tube completely; Under the temperature condition of 155 degree, melting charge slurry and the extraneous potash fertilizer adding mix, and make the complete melting of potassium fertilizer particle; The tenth step, and the melting charge slurry that mixes of phosphate fertilizer, potash fertilizer 19, flow to emulsor 20 by discharge nozzle and carry out emulsification; The 11 step, the uniform slurry solution of emulsification is by expecting that pipe flow to the rotary nozzle 21 of tablets press, in the tablets press speed of mainshaft, be under 100rpm condition, slip liquid throws away from rotary nozzle 21, the high tower that slip is 75m left and right through virtual height falls, by air cooling, the crystallization of slip liquid is the solid particulate 22 of diameter 0.5～4.8MM; The 12 step, the vibratory screening apparatus 23 that solid particulate 22 is 2.0～4.0MM by mesh size sifts out the finished particle of 2.0～4.0MM, the 13 step, finished particle through packing machine 24 carry out anti-compaction process make that product surface is mellow and full, uniform particles, the qualified particle of product strength phosphorus-potassium nitrate fertilizer high, good water solubility; The 14 step, qualified phosphorus-potassium nitrate fertilizer particle makes qualified phosphorus-potassium nitrate fertilizer product 26 after wrapping machine 1#25 packing.
Phosphorus-potassium nitrate fertilizer product strength 50 newton that the inventive method makes, dissolution time is 4.5 minutes, particle surface is Paint Gloss, mellow and full, grain diameter is even, and as shown in Figure 4, the product strength that adopts rotary drum fluid-bed production is 35 newton, dissolution time is 5 minutes, as shown in Figure 5, particle surface is mellow and full not for particle appearance, and particle diameter is inhomogeneous.
Embodiment 2
The industrial nitric acid 2 that the first step is 50% by concentration and flotation phosphorus ore 1, by weight 2.2:1 reaction, make acid hydrolysis solution 3, second step, and acid hydrolysis solution is through filtering insolubles after reaction 5 by volute machine, washing drum and plate-and-frame filter press 4; The 3rd step, the clear liquid 6 after filtration is separated out four water-calcium nitrate 9 xln through freezing and crystallizing; The 4th step, removes the four water-calcium nitrate 9 crystallizing out through CN filter 8 degree of depth; The 5th step, after logical ammonia 11 and filtration, clear liquid 10 carries out neutralization reaction; The 6th step, after neutralization, slip 12 is undertaken in the multistage concentrated NP that makes 98% concentration and concentrated solution 14 by vaporizer 13; The 7th step, makes the solid particulate of 0.5～5.2MM with concentrated solution 14 in NP through biaxial granulation machine 27, the 8th step, and 0.5～5.2MM solid particulate is carried to 85M tower top slip storage tank 15 through chapelet 28; Under the steam coil heated condition of 135 degree, nitrophosphate fertilizer particle fusion is nitrophosphate fertilizer slurry solution; The 9th step, the nitrophosphate fertilizer slurry solution of 98% concentration flow to one-level tempering tank 16 through tower top slip storage tank 15, and under the temperature condition of 160 degree, nitrophosphate fertilizer slip liquid and the extraneous phosphate fertilizer 17 adding mix, and make the complete melting of phosphate fertilizer; The tenth step, the slip liquid after dissolving completely flow to secondary tempering tank 18 by upflow tube; Under the temperature condition of 155 degree, melting charge slurry and the extraneous potash fertilizer adding mix, and make the complete melting of potassium fertilizer particle; The 11 step, and the melting charge slurry that mixes of phosphate fertilizer 17, potash fertilizer 19, flow to emulsor 20 by discharge nozzle and carry out emulsification; The 12 step, the uniform slurry solution of emulsification is by expecting that pipe flow to the rotary nozzle 21 of tablets press, in the tablets press speed of mainshaft, be under 100rpm condition, slip liquid throws away from rotary nozzle 21, the tower top that slip liquid is 75m left and right through virtual height falls, by air cooling, the crystallization of slip liquid is the solid particulate 22 of diameter 0.5～4.8MM; The 13 step, the vibratory screening apparatus 23 that solid particulate 22 is 2.0～4.0MM by mesh size sifts out the finished particle of 2.0～4.0MM, the 14 step, finished particle through packing machine 24 carry out anti-compaction process make that product surface is mellow and full, uniform particles, the qualified particle of product strength phosphorus-potassium nitrate fertilizer high, good water solubility; The 15 step, qualified phosphorus-potassium nitrate fertilizer particle makes qualified phosphorus-potassium nitrate fertilizer product 26 after wrapping machine 1#25 packing.
Phosphorus-potassium nitrate fertilizer product strength 50 newton that the inventive method makes, dissolution time is 4.5 minutes, and the product strength that adopts rotary drum fluid-bed production is 35 newton, and dissolution time is 5 minutes.
Embodiment 3
The industrial nitric acid solution 2 that the first step is 50% by concentration and flotation phosphorus ore 1, by weight 2.2:1 reaction, make acid hydrolysis solution 3, second step, and acid hydrolysis solution 3 is through filtering insolubles after reaction 5 by volute machine, washing drum and plate-and-frame filter press 4; The 3rd step, the clear liquid 6 after filtration is separated out four water-calcium nitrate 9 xln through freezing and crystallizing; The 4th step, removes the four water-calcium nitrate 9 crystallizing out through CN filter 8 degree of depth; The 5th step, after logical ammonia 11 and filtration, clear liquid 10 carries out neutralization reaction; The 6th step, after neutralization, slip 12 is undertaken in the multistage concentrated NP that makes 98% concentration and concentrated solution 14 by vaporizer 13; The 7th step, makes the solid particulate of 0.5～5.2MM with concentrated solution 14 in NP through biaxial granulation machine 27; The 8th step, the vibratory screening apparatus 2#29 screen cloth screening of solid particulate footpath 2.0～4.0MM, 2.0～4.0MM particle is dry through 125 ℃ of dehumidification systems, after cooling, parcel, packs, and makes low-grade nitrophosphate fertilizer product 32; The 9th step, the large and small returning charge particle 33 sieving out through vibratory screening apparatus 2#29 (the large returning charge particle of 4.1～5.2MM of the little returning charge particle of 0.5～1.9MM of vibratory screening apparatus 29 extension set screenings and vibratory screening apparatus 29 extension set screenings), carries large and small returning charge particle to 85M tower top slip storage tank 15 through chapelet 28; Under the steam coil heated condition of 190 degree, nitrophosphate fertilizer particle fusion is nitrophosphate fertilizer slurry solution; The 9th step, the nitrophosphate fertilizer slurry solution of 98% concentration flow to one-level tempering tank 16 through tower top slip storage tank 15, and under the temperature condition of 145 ℃ of degree, nitrophosphate fertilizer slip liquid and the extraneous phosphate fertilizer 17 adding mix, phosphate fertilizer 17 meltings; The tenth step, dissolves mixed slip liquid completely and flow to secondary tempering tank 18 by upflow tube; Under the temperature condition of 140 degree, melting charge slurry and the extraneous potash fertilizer 19 adding mix, and potassium fertilizer particle 19 is dissolved completely; The 11 step, and the melting charge slurry that mixes of phosphate fertilizer 17, potash fertilizer 19, flow to emulsor 20 by discharge nozzle and carry out emulsification; The 12 step, the uniform slurry solution of emulsification is by expecting that pipe flow to the rotary nozzle 21 of tablets press, in the tablets press speed of mainshaft, be under 100rpm condition, slip liquid throws away from rotary nozzle 21, the tower top that slip liquid is 75m left and right through virtual height falls, by air cooling, the crystallization of slip liquid is the solid particulate 22 of diameter 0.5～4.8MM; The 13 step, the vibratory screening apparatus 23 that solid particulate 22 is 2.0～4.0MM by mesh size sifts out the finished particle of 2.0～4.0MM, the 14 step, finished particle through packing machine 24 carry out anti-compaction process make that product surface is mellow and full, uniform particles, the qualified particle of product strength phosphorus-potassium nitrate fertilizer high, good water solubility; The 15 step, qualified phosphorus-potassium nitrate fertilizer particle makes qualified phosphorus-potassium nitrate fertilizer product 26 after wrapping machine 1#25 packing.
Phosphorus-potassium nitrate fertilizer product strength 50 newton that the inventive method makes, dissolution time is 4.5 minutes, and the product strength that adopts rotary drum fluid-bed production is 35 newton, and dissolution time is 5 minutes.
Claims (10)
1. a granulation process for phosphorus-potassium nitrate fertilizer, is characterized in that, comprises the following steps:
(1), at 145～165 ℃, phosphate fertilizer is mixed and obtains slip with nitrophosphate fertilizer;
(2) at 140～155 ℃, potash fertilizer is mixed with slip, obtain mixed slurry, the temperature of step (2) is lower than the temperature of step (1);
(3) spray mixed slurry, obtain phosphorus-potassium nitrate fertilizer particle;
Described nitrophosphate fertilizer is by nitrophosphate fertilizer finished particle, nitrophosphate fertilizer returning charge particle or nitrophosphate fertilizer and the nitrophosphate fertilizer slip that obtains after 135～190 ℃ of heating of concentrated solution.
2. granulation process according to claim 1, is characterized in that: described nitrophosphate fertilizer finished particle is the nitrophosphate fertilizer product obtaining after granulation with concentrated solution in nitrophosphate fertilizer.
3. granulation process according to claim 1, is characterized in that: described nitrophosphate fertilizer returning charge particle is in nitrophosphate fertilizer and the returning charge particle that obtain of concentrated solution after granulation, screening.
4. according to the granulation process one of claim 1～3 Suo Shu, it is characterized in that: in described nitrophosphate fertilizer, comprise the following steps with the preparation method of concentrated solution: the first step, nitric acid and phosphorus ore reaction make acid hydrolysis solution; Second step, filters; The 3rd step, the clear liquid after filtration is through freezing and crystallizing crystallization body; The 4th step, removes xln; The 5th step, logical ammonia carries out neutralization reaction with the clear liquid of removing crystal; The 6th step, after neutralization, to carry out the multistage concentrated mass percent that makes be in 85%～98% nitrophosphate fertilizer and concentrated solution to slip.
5. according to the granulation process one of claim 1～3 Suo Shu, it is characterized in that: described sprinkling mixed slurry is that the rotary nozzle by high tower granulator sprays.
6. granulation process according to claim 5, is characterized in that: described is that the tower top slip storage tank that is delivered to high tower with concentrated solution by liquid conducting pipes in nitrophosphate fertilizer is heated 135～190 ℃ of heating.
7. granulation process according to claim 5, is characterized in that: described is that the tower top slip storage tank that nitrophosphate fertilizer finished particle and nitrophosphate fertilizer returning charge particle are delivered to high tower through lift heats 135～190 ℃ of heating.
8. according to the granulation process described in claim 6 or 7, it is characterized in that: described heating is to adopt steam heating or electrically heated.
9. according to the granulation process one of claim 1～3 Suo Shu, it is characterized in that: after described sprinkling mixed slurry, also comprise the step that screening and surperficial anti-caking are processed.
10. according to the granulation process one of claim 1～3 Suo Shu, it is characterized in that: described phosphate fertilizer is monoammonium phosphate, diammonium phosphate, fused(calcium magnesium)phosphate, calcium superphosphate or double superhosphate, described potash fertilizer is potassium sulfate, Repone K or saltpetre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410320623.7A CN104108969B (en) | 2014-07-04 | A kind of granulation process of phosphorus-potassium nitrate fertilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410320623.7A CN104108969B (en) | 2014-07-04 | A kind of granulation process of phosphorus-potassium nitrate fertilizer |
Publications (2)
| Publication Number | Publication Date |
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| CN104108969A true CN104108969A (en) | 2014-10-22 |
| CN104108969B CN104108969B (en) | 2016-11-30 |
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| CN105693334A (en) * | 2016-03-16 | 2016-06-22 | 史丹利化肥股份有限公司 | Potassium nitrate co-production tower-type melt micrograin water-soluble fertilizer and preparing method thereof |
| CN105777273A (en) * | 2015-04-01 | 2016-07-20 | 贵州芭田生态工程有限公司 | Method for granulating mineral element chelated nitric phosphate fertilizer |
| CN105777369A (en) * | 2015-04-01 | 2016-07-20 | 贵州芭田生态工程有限公司 | Preparation method of nitrophosphate fertilizer containing medium trace elements |
| CN110734314A (en) * | 2018-07-19 | 2020-01-31 | 贵州芭田生态工程有限公司 | Phosphorus potassium nitrate fertilizer and preparation method thereof |
| CN112409108A (en) * | 2020-12-09 | 2021-02-26 | 天脊煤化工集团股份有限公司 | Preparation method and production device of phosphorus potassium nitrate compound fertilizer |
| CN112479768A (en) * | 2019-09-12 | 2021-03-12 | 贵州芭田生态工程有限公司 | Water-soluble phosphorus potassium nitrate calcium magnesium fertilizer and preparation method thereof |
| CN113072410A (en) * | 2021-03-19 | 2021-07-06 | 深圳市芭田生态工程股份有限公司 | Low-tower preparation method of small-particle nitric phosphate fertilizer |
| CN113087574A (en) * | 2021-03-19 | 2021-07-09 | 深圳市芭田生态工程股份有限公司 | Low-tower preparation method of small-particle phosphorus potassium nitrate fertilizer |
| CN114538479A (en) * | 2022-03-03 | 2022-05-27 | 淄博永新化工有限公司 | Method for recycling waste materials for gelatin production |
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| CN105777273A (en) * | 2015-04-01 | 2016-07-20 | 贵州芭田生态工程有限公司 | Method for granulating mineral element chelated nitric phosphate fertilizer |
| CN105777369A (en) * | 2015-04-01 | 2016-07-20 | 贵州芭田生态工程有限公司 | Preparation method of nitrophosphate fertilizer containing medium trace elements |
| CN105693334A (en) * | 2016-03-16 | 2016-06-22 | 史丹利化肥股份有限公司 | Potassium nitrate co-production tower-type melt micrograin water-soluble fertilizer and preparing method thereof |
| CN110734314A (en) * | 2018-07-19 | 2020-01-31 | 贵州芭田生态工程有限公司 | Phosphorus potassium nitrate fertilizer and preparation method thereof |
| CN112479768A (en) * | 2019-09-12 | 2021-03-12 | 贵州芭田生态工程有限公司 | Water-soluble phosphorus potassium nitrate calcium magnesium fertilizer and preparation method thereof |
| CN112409108A (en) * | 2020-12-09 | 2021-02-26 | 天脊煤化工集团股份有限公司 | Preparation method and production device of phosphorus potassium nitrate compound fertilizer |
| CN113072410A (en) * | 2021-03-19 | 2021-07-06 | 深圳市芭田生态工程股份有限公司 | Low-tower preparation method of small-particle nitric phosphate fertilizer |
| CN113087574A (en) * | 2021-03-19 | 2021-07-09 | 深圳市芭田生态工程股份有限公司 | Low-tower preparation method of small-particle phosphorus potassium nitrate fertilizer |
| CN114538479A (en) * | 2022-03-03 | 2022-05-27 | 淄博永新化工有限公司 | Method for recycling waste materials for gelatin production |
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