CN104355778A - Potassium fertilizer granules and granulating method thereof - Google Patents
Potassium fertilizer granules and granulating method thereof Download PDFInfo
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- CN104355778A CN104355778A CN201410499552.1A CN201410499552A CN104355778A CN 104355778 A CN104355778 A CN 104355778A CN 201410499552 A CN201410499552 A CN 201410499552A CN 104355778 A CN104355778 A CN 104355778A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/40—Fertilisers incorporated into a matrix
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D1/00—Fertilisers containing potassium
- C05D1/02—Manufacture from potassium chloride or sulfate or double or mixed salts thereof
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
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Abstract
The invention relates to potassium fertilizer granules and a granulating method thereof. The potassium fertilizer granules are characterized by comprising the following raw materials in percentage by weight: 85%-90% of potassium chloride or potassium sulfate powder, 7%-14% of thermoplastic starch, 0.4%-1.8% of a dispersant and 0.4%-1.8% of a surface treatment agent, wherein the total weight percent of the raw materials is 100%. According to the granulating method, the granulating operation of a potassium fertilizer is finished through a double-screw extruder, and the potassium fertilizer and the thermoplastic starch are uniformly dispersed in the double-screw extruder under the action of an assistant and are mixed, coupled, compressed, extruded and diced. The granulating method comprises the following concrete steps: a, grinding; b, dosing; c, blending; d, mixing; e, granulating; f, cooling; g, screening; h, packaging to obtain the qualified potassium fertilizer granules. The method is simple in process and low in cost, and can be used for continuous production; the obtained potassium fertilizer granules are regular, uniform in nutrition dispersion and high in intensity, and have market application values.
Description
Technical field
The present invention relates to a kind of potash fertilizer, in particular, the present invention relates to a kind of potassium fertilizer particle and prilling process thereof, metal particles slow-release potassium fertilizer field.
Background technology
Potash fertilizer is one of three large chemical fertilizer kinds, mainly the sylvite such as Repone K, potassium sulfate, plant ash (salt of wormwood), and these sylvite are powder or small-particle crystal, very easily dissolve in water, and plant then mainly absorbs the potassium ion in the soil solution.Potassium element is one of indispensable element of plant, plant materials include that potassium generally accounts for dry matter weight 0.2% ~ 4.1%, be only second to nitrogen, visible Potassium Fertilizer is big, and according to statistics, the annual potash fertilizer consumption of China is close to 5,000,000 tons.
Common potash fertilizer is Powdered, is a kind of fertilizer efficiency readily avaiable fertilizer faster, after being applied to soil, and the too fast release of nutrient, crop of easily burning., easily do not outflowed with water by the nutrient that crop absorbs in time meanwhile, cause potassium utilization rate to decline, according to statistics, this season utilization ratio of China's potash fertilizer is only 35% ~ 40%, and the waste of potassium resource not only makes economy incur loss, and contaminated soil, water source.In addition, Powdered potash fertilizer physicals is not good, and easily play dirt during handling, long storage time is easily lumpd, poor fluidity, applies fertilizer extremely inconvenient, is more difficult to realize mechanical fertilization.And granular potash fertilizer can play certain slow releasing function, the utilization ratio of potash fertilizer nutrient can be improved; Granular potash fertilizer good physical performance simultaneously, do not play dirt during handling, long-term storage is not lumpd, good fluidity, the requirement of the mechanization of agriculture that is content with very little fertilising; Other granular fertilizers that can also be close with granular size directly mix that to be mixed with BB fertile and have the effect of composite fertilizer.
But because potash fertilizer Repone K belongs to isometric system, potassium sulfate belongs to rhombic system, is ionic crystal, and this crystalline structure causes its no adhesion and plasticity-, make its granulation difficulty.At present, world's potash fertilizer output about 7,400 ten thousand t Repone K, wherein only 40% is processed to granule type, and the granular potash fertilizer of 90% all with powdery potash fertilizer for raw material, adopt roller extruder method secondary processing to obtain.Therefore, a kind of technique is simple, and cost is low, and power consumption is few, can carry out quantity-produced, and the high production method of gained potassium fertilizer particle intensity has earth shaking meaning to China's granulating potash fertilizer technology and market.
Extrusion moulding is completed by screw extrusion press, it is that heating material is melted to viscous state, by the squeezing action of screw rod, promote the material of viscous state and become cross section and the similar continuum of Oral incision by mouth mould, if use circular orifices mould, then extrudate can be cut into the particulate state of rule, and granulating rate is high.Extrusion moulding occupies very consequence in plastic product forming processing industry, and the method has following features: 1.. continuous prodution; 2.. very high productivity; 3.. applied range; 4.. require less investment while yielding quicker results.
Twin screw extruder occurs on the basis of single screw extrusion machine and grows up, except possessing single screw extrusion machine basic characteristics, it also has, and shearing force is large, heat transfer area large, accurate measurement, feed performance are good, be suitable for raw material processing, melting effect is good, exhaust and reaction effect good, there is the advantages such as self-cleaning function simultaneously, be widely used in that forming process, preformed are mixing, the aspect such as polyreaction and waste disposal.Meshing co rotating twin screw extrusion more brings the mixed performance of polytropy and adaptability and excellence with its modular construction, at present, twin screw extruder is out of trade except applying to polymer processing, is also widely used in the fields such as chemical industry, food-processing industry, feed processing industry, paper-making industry, gunpowder production.
Patent CN 201310528939.0 discloses the granulation aid combination needed for a kind of agglomeration granulation; granulation aid is mixed by polyacrylamide, water glass and borax; polyacrylamide, water glass and borax have close-burning organic or inorganic material; after these granulation aid and powder potash fertilizer and the fragmentation of water Homogeneous phase mixing; in agglomeration granulation machine, (as granulating disc, rotary drum granulator) carries out agglomeration granulation, finally carries out the operations such as drying, cooling, screening.This prilling process is wet agglomeration granulation (adding water), granulation in its production process, drying operation difficulty, the shortcomings such as product appearance is poor, and granule strength is low.
Patent CN201010175892.0 discloses a kind of method that roller press type produces potassium fertilizer particle, the method is by roll squeezer by potash fertilizer compressing tablet, and the step then through super-dry, fragmentation, whole grain, screening implements granulation, and the method granulation effect is low, output is little, is difficult to meet scale operation.
Patent CN201310347978.0 discloses a kind of sprinkling pelleting method of potash fertilizer potassium chloride particle, through spraying after potash fertilizer Repone K being heated in the method prilling tower 800 DEG C of meltings, melting Repone K is lowered the temperature rapidly in descent, form a kind of circular hollow particle, the potassium chloride particle that this method is produced has good mobility, but its prilling tower building cost is high, needs the 800 DEG C of high temperature being heated to make Repone K melting in production process, consume energy too high.
Therefore, develop a kind of technique simple, cost is low, and power consumption is few, and can carry out continuous seepage, output is high, and the high production technology route of gained potassium fertilizer particle intensity and method have earth shaking meaning to China's granulating potash fertilizer technology and market.
Summary of the invention
The present invention is directed in above-mentioned patent, the potassium fertilizer particle that roller extruder method is produced is irregular, yields poorly, and melting sprinkling pelleting cost is high, power consumption is large, the shortcomings such as the technological operation difficulty of agglomeration granulation, appearance poor, granule strength are low, provide a kind of potassium fertilizer particle and prilling process thereof.Potash fertilizer granulation is combined with twin screw extruder by the present invention, by thermoplastic starch and other auxiliary agents, prepares a kind of regular particles, nutrient is uniformly dispersed, high strength potassium fertilizer particle.Present invention process is simple, and cost is low, and power consumption is few, can continuous seepage, and output is high, has great marketable value.
Technical scheme of the present invention is as follows:
A kind of potassium fertilizer particle, is characterized in that: this potassium fertilizer particle component mass percent is: Repone K or potassium sulfate powder 85% ~ 90%, thermoplastic starch 7% ~ 14%, dispersion agent 0.4% ~ 1.8%, surface treatment agent 0.4% ~ 1.8%, and each component sum is 100%.
Above-mentioned potassium fertilizer particle, described Repone K or potassium sulfate powder size are less than 100 μm; Described thermoplastic starch degree of crystallinity is≤5%, and melt flow rate (MFR) is 0.2 ~ 5g/10min, and melt processing temperature scope is 120 ~ 160 DEG C; Described dispersion agent is the one in low molecular polyethylene, stearic acid, and surface treatment agent is the one in three oleoyl isopropyl titanates, tributyl phosphate.
Above-mentioned potassium fertilizer particle, this granular potash fertilizer prilling process completes granulation by twin screw extruder to potash fertilizer, and granulation step is:
A. pulverize, potash fertilizer Repone K or potassium sulfate are crushed to less than 100 μm in ball mill;
B. prepare burden, take respectively by matter percentage and pulverize post chlorization potassium or potassium sulfate, thermoplastic starch, dispersion agent, surface treatment agent;
C. mix, first potash fertilizer powder and thermoplastic starch and dispersion agent are added high-speed mixer or two-dimensional mixing machine successively, start mixing machine, mix 10 ~ 20 minutes, then add surface treatment agent and mix 10 ~ 15 minutes, make mixing of materials even;
D. mixing, mixed uniformly material is sent into twin screw extruder, and through charging, conveying, mixing, linked reaction, compression, finally by die extrusion;
E. granulation, the material be compacted after mixing reaction, is directly cut into pellet by air-flow tablets press after die extrusion;
F. cool, pellet carries out preliminary quenching in the airflow of air-flow tablets press, is then sent into fluidized-bed by airflow and cools further pellet;
G. screen, cooled pellet is sent into vibratory screening apparatus and screens, particle diameter 3 ± 1mm is qualified pellet, again sends into forcing machine granulation after underproof pellet process;
H. pack, pellet qualified for particle diameter is packed, obtain qualified potassium fertilizer particle.
Above-mentioned potassium fertilizer particle prilling process, described double-screw extruder screw length-to-diameter ratio is 20 ~ 35:1, and diameter is 60 ~ 150mm; Screw combinations comprises feed zone, transportation section, mixing section, compression section, is 90 ~ 120 DEG C between each section of temperature setting district, 120 ~ 130 DEG C, 130 ~ 140 DEG C, 120 ~ 130 DEG C, is 100 ~ 120 DEG C between die temperature setting district; Be 100 ~ 350 r/min between screw speed setting district.
Above-mentioned potassium fertilizer particle prilling process, described screw compression section comprises the compression threaded block of more than 2 groups or 2 groups; Described mouth mould is circular orifices mould, aperture 3mm.
Potash fertilizer granulation is combined with twin screw extruder by the present invention, after potash fertilizer powder and thermoplastic starch and other auxiliary agent Homogeneous phase mixing, after sending into twin screw extruder, through feed zone, transportation section, thermoplastic starch is fusion plastification gradually, and then through mixing section and compression section, potash fertilizer powder fully mixes with the thermoplastic starch of melting, disperse coated, linked reaction, mixing compacting, finally by die extrusion pelletizing, prepare regular particles, the granular potash fertilizer that intensity is high.
The present invention is adjuvant used is dispersion agent and surface treatment agent, and after potash fertilizer and thermoplastic starch Homogeneous phase mixing, under the effect of dispersion agent, namely potash fertilizer have certain degree of scatter.Again through twin screw extruder conveying, mixing section, through surface treatment agent, the i.e. effect of coupling agent, potash fertilizer powder and thermoplastic starch carry out linked reaction, potash fertilizer powder mixes fully in the thermoplastic starch of melting, coupling, makes the requirement reaching fully dispersion of potash fertilizer nutrient, there will not be the phenomenon of potash fertilizer nutrient segregation, improve the ultimate compression strength of potassium fertilizer particle simultaneously.
The present invention's thermoplastic starch used has biodegradable, it is as the carrier of potash fertilizer, make potash fertilizer be formed the high rule particle shape of intensity, it has excellent biodegradability simultaneously, environmentally friendly, after using with potash fertilizer granulating, under the effect of each quasi-microorganism of soil, thermoplastic starch is progressively degraded, potash fertilizer nutrient slow releasing, substantially increase the utilization ratio of potassium element, and the pollution of soil, water body can not be caused.
The present invention has following outstanding feature and beneficial effect:
1, the potassium fertilizer particle of the present invention's production is owing to utilizing thermoplastic starch as granulation matrix, and has regular shape, and intensity is high, the feature of good fluidity, is easy to other granular fertilizer mixtures close with granular size, meets mechanized application requirement.
2, the present invention's tablets press used is double-screw extruding pelletizing machine, and level of automation is high, simple to operate, and cost is low, and power consumption is few, and efficiency is high, has the market using value promoted and produce.
3, the invention belongs to non-slurry pelletizing, gained particle does not need to carry out drying treatment, only needs cooling screening, and technique is simple, and consume energy low, can carry out continuous seepage, output is high, low production cost, has earth shaking meaning to China's granulating potash fertilizer technology and market.
Table one, product main performance index of the present invention.
| Particle size | Granule strength | Granular potash fertilizer content | Particle nutrient content | Sustained release performance |
| 3±1mm | 50~60 N | 85%~90% | 42.5%~54% | The accumulative release < 75% of 28d |
In table, potassium nutrition content >40%, sustained release performance meets HG/T4215-2011 release and release control fertilizer index.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
In figure, 1 is start; 2 is potash fertilizer, potassium sulfate or Repone K; 3 is pulverizing process of potash fertilizer; 4 is thermoplastic starchs; 5 is auxiliary agents, dispersion agent and surface treatment agent; 6 is weighing burden processes; 7 is mixing of materials operations; 8 is material mixing extrusion operations; 9 is pelletizing operations; 10 is particle refrigerating work procedures; 11 is particle screen selecting operations; 12 is granule packaging operations; 13 to represent particle screen selecting particle diameter defective, will return 8 mixing extrusion operations; 14 to represent particle screen selecting particle diameter qualified, will carry out 12 packaging processes;
15 is the explanations to 8 material mixing extrusion operations: twin screw extruder, temperature setting (DEG C): feed zone: 90 ~ 120, transportation section: 120 ~ 130, mixing section: 130 ~ 140, compression section: 120 ~ 130, mouth mould: 100 ~ 120; Rotating speed (r/min): 100 ~ 350
specific embodiments
Below by way of embodiment, the present invention is described in further detail, but this should be interpreted as scope of the present invention is only limitted to following example.When not departing from aforesaid method thought of the present invention, the various replacement made according to ordinary skill knowledge and customary means or change, all should be within the scope of the present invention.
In following examples, raw material potash fertilizer powder size is less than 100 μm.
embodiment 1
1) Repone K powder 85kg is taken, thermoplastic starch 14kg, stearic acid 0. 4kg, tributyl phosphate 0. 6kg, by even for each mixing of materials.
2) select screw diameter to be 65mm, length-to-diameter ratio is 20:1, and compression section is provided with the twin screw extruder of 2 groups of compression threaded blocks.
3) twin screw extruder each district temperature is set as: feed zone 90 DEG C, 120 DEG C, transportation section, mixing section 130 DEG C, 120 DEG C, compression section, and mouth mould 100 DEG C, screw speed is set as 150r/min.
4) material that step 1) mixes is sent into the good twin screw extruder of each parameter setting, through charging, conveying, mixing, compression, finally by die extrusion, pelletizing.
5) cooled by potassium fertilizer particle, screening, obtains qualified potassium fertilizer particle: particle diameter 3 ± 1mm, nutrient content 47, granule strength 59N.
embodiment 2
1) take potassium sulfate powder 86kg, thermoplastic starch 12kg, stearic acid 1kg, three oleoyl isopropyl titanate 1kg, by even for each mixing of materials.
2) select screw diameter to be 85mm, length-to-diameter ratio is 25:1, and compression section is provided with the twin screw extruder of 2 groups of compression threaded blocks.
3) twin screw extruder each district temperature is set as: feed zone 100 DEG C, 120 DEG C, transportation section, mixing section 130 DEG C, 120 DEG C, compression section, and mouth mould 100 DEG C, screw speed is set as 200r/min.
4) material that step 1) mixes is sent into the good twin screw extruder of each parameter setting, through charging, conveying, mixing, compression, finally by die extrusion, pelletizing.
5) cooled by potassium fertilizer particle, screening, obtains qualified potassium fertilizer particle: particle diameter 3 ± 1mm, nutrient content 45, granule strength 57N.
embodiment 3
1) Repone K powder 87kg is taken, thermoplastic starch 10kg, low molecular polyethylene 1kg, tributyl phosphate 2kg, by even for each mixing of materials.
2) select screw diameter to be 105mm, length-to-diameter ratio is 25:1, and compression section is provided with the twin screw extruder of 2 groups of compression threaded blocks.
3) twin screw extruder each district temperature is set as: feed zone 100 DEG C, 120 DEG C, transportation section, mixing section 130 DEG C, 120 DEG C, compression section, and mouth mould 110 DEG C, screw speed is set as 200r/min.
4) material that step 1) mixes is sent into the good twin screw extruder of each parameter setting, through charging, conveying, mixing, compression, finally by die extrusion, pelletizing.
5) cooled by potassium fertilizer particle, screening, obtains qualified potassium fertilizer particle: particle diameter 3 ± 1mm, nutrient content 48, granule strength 55N.
embodiment 4
1) take potassium sulfate powder 88kg, thermoplastic starch 10kg, low molecular polyethylene 1kg, three oleoyl isopropyl titanate 1kg, by even for each mixing of materials.
2) select screw diameter to be 125mm, length-to-diameter ratio is 25:1, and compression section is provided with the twin screw extruder of 3 groups of compression threaded blocks.
3) twin screw extruder each district temperature is set as: feed zone 110 DEG C, 130 DEG C, transportation section, mixing section 140 DEG C, 130 DEG C, compression section, and mouth mould 110 DEG C, screw speed is set as 200r/min.
4) material that step 1) mixes is sent into the good twin screw extruder of each parameter setting, through charging, conveying, mixing, compression, finally by die extrusion, pelletizing.
5) cooled by potassium fertilizer particle, screening, obtains qualified potassium fertilizer particle: particle diameter 3 ± 1mm, nutrient content 46, granule strength 54N.
embodiment 5
1) Repone K powder 90kg is taken, thermoplastic starch 7kg, stearic acid 1.5kg, tributyl phosphate 1.5kg, by even for each mixing of materials.
2) select screw diameter to be 135mm, length-to-diameter ratio is 30:1, and compression section is provided with the twin screw extruder of 3 groups of compression threaded blocks.
3) twin screw extruder each district temperature is set as: feed zone 120 DEG C, 130 DEG C, transportation section, mixing section 140 DEG C, 130 DEG C, compression section, and mouth mould 120 DEG C, screw speed is set as 250r/min.
4) material that step 1) mixes is sent into the good twin screw extruder of each parameter setting, through charging, conveying, mixing, compression, finally by die extrusion, pelletizing.
5) cooled by potassium fertilizer particle, screening, obtains qualified potassium fertilizer particle: particle diameter 3 ± 1mm, nutrient content 50, granule strength 51N.
Claims (5)
1. a potassium fertilizer particle, it is characterized in that: this potassium fertilizer particle component mass percent is: Repone K or potassium sulfate powder 85% ~ 90%, thermoplastic starch 7% ~ 14%, dispersion agent 0.4% ~ 1.8%, surface treatment agent 0.4% ~ 1.8%, each component sum is 100%.
2. potassium fertilizer particle according to claim 1, is characterized in that: described Repone K or potassium sulfate powder size are less than 100 μm; Described thermoplastic starch degree of crystallinity is≤5%, and melt flow rate (MFR) is 0.2 ~ 5g/10min, and melt processing temperature scope is 120 ~ 160 DEG C; Described dispersion agent is the one in low molecular polyethylene, stearic acid, and surface treatment agent is the one in three oleoyl isopropyl titanates, tributyl phosphate.
3. potassium fertilizer particle according to claim 1, is characterized in that: this granular potash fertilizer prilling process completes granulation by twin screw extruder to potash fertilizer, and granulation step is:
A. pulverize, potash fertilizer Repone K or potassium sulfate are crushed to less than 100 μm in ball mill;
B. prepare burden, take respectively by matter percentage and pulverize post chlorization potassium or potassium sulfate, thermoplastic starch, dispersion agent, surface treatment agent;
C. mix, first potash fertilizer powder and thermoplastic starch and dispersion agent are added high-speed mixer or two-dimensional mixing machine successively, start mixing machine, mix 10 ~ 20 minutes, then add surface treatment agent and mix 10 ~ 15 minutes, make mixing of materials even;
D. mixing, mixed uniformly material is sent into twin screw extruder, and through charging, conveying, mixing, linked reaction, compression, finally by die extrusion;
E. granulation, the material be compacted after mixing reaction, is directly cut into pellet by air-flow tablets press after die extrusion;
F. cool, pellet carries out preliminary quenching in the airflow of air-flow tablets press, is then sent into fluidized-bed by airflow and cools further pellet;
G. screen, cooled pellet is sent into vibratory screening apparatus and screens, particle diameter 3 ± 1mm is qualified pellet, again sends into forcing machine granulation after underproof pellet process;
H. pack, pellet qualified for particle diameter is packed, obtain qualified potassium fertilizer particle.
4. potassium fertilizer particle prilling process according to claim 3, is characterized in that, described double-screw extruder screw length-to-diameter ratio is 20 ~ 35:1, and diameter is 60 ~ 150mm; Screw combinations comprises feed zone, transportation section, mixing section, compression section, is 90 ~ 120 DEG C between each section of temperature setting district, 120 ~ 130 DEG C, 130 ~ 140 DEG C, 120 ~ 130 DEG C, is 100 ~ 120 DEG C between die temperature setting district; Be 100 ~ 350 r/min between screw speed setting district.
5. potassium fertilizer particle prilling process according to claim 4, is characterized in that, described screw compression section comprises the compression threaded block of more than 2 groups or 2 groups; Described mouth mould is circular orifices mould, aperture 3mm.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106278607A (en) * | 2016-08-15 | 2017-01-04 | 湖北富邦科技股份有限公司 | A kind of preparation method containing zinc slow release rounded grain potash fertilizer |
| 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 |
| WO2019167036A1 (en) | 2018-02-27 | 2019-09-06 | Dead Sea Works Ltd. | Potash dust granulation process |
| CN110526761A (en) * | 2019-10-16 | 2019-12-03 | 贵州西洋实业有限公司 | A kind of granulated fertilizer and its dry technology for production |
| CN112919933A (en) * | 2021-04-13 | 2021-06-08 | 康伟华 | Method for preparing organic potassium sulfate round granular fertilizer |
| CN112939706A (en) * | 2021-04-01 | 2021-06-11 | 义乌市创继农业科技有限公司 | Preparation method of high-concentration binary compound fertilizer |
| CN113214022A (en) * | 2021-04-23 | 2021-08-06 | 湖北富邦科技股份有限公司 | Instant round-particle potash fertilizer granulation auxiliary agent and use method thereof |
| CN113893775A (en) * | 2021-11-12 | 2022-01-07 | 浙江润阳新材料科技股份有限公司 | Continuous granulation method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106278607A (en) * | 2016-08-15 | 2017-01-04 | 湖北富邦科技股份有限公司 | A kind of preparation method containing zinc slow release rounded grain potash fertilizer |
| 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 |
| WO2019167036A1 (en) | 2018-02-27 | 2019-09-06 | Dead Sea Works Ltd. | Potash dust granulation process |
| EP3758836A4 (en) * | 2018-02-27 | 2021-11-24 | Dead Sea Works Ltd. | Potash dust granulation process |
| US12017198B2 (en) | 2018-02-27 | 2024-06-25 | Dead Sea Works Ltd. | Potash dust granulation process |
| CN110526761A (en) * | 2019-10-16 | 2019-12-03 | 贵州西洋实业有限公司 | A kind of granulated fertilizer and its dry technology for production |
| CN112939706A (en) * | 2021-04-01 | 2021-06-11 | 义乌市创继农业科技有限公司 | Preparation method of high-concentration binary compound fertilizer |
| CN112919933A (en) * | 2021-04-13 | 2021-06-08 | 康伟华 | Method for preparing organic potassium sulfate round granular fertilizer |
| CN113214022A (en) * | 2021-04-23 | 2021-08-06 | 湖北富邦科技股份有限公司 | Instant round-particle potash fertilizer granulation auxiliary agent and use method thereof |
| CN113893775A (en) * | 2021-11-12 | 2022-01-07 | 浙江润阳新材料科技股份有限公司 | Continuous granulation method |
| CN113893775B (en) * | 2021-11-12 | 2024-05-10 | 浙江润阳新材料科技股份有限公司 | Continuous granulating method |
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| CN104355778B (en) | 2017-02-15 |
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