CN104311258A - Preparation method for potash fertilizer particles - Google Patents
Preparation method for potash fertilizer particles Download PDFInfo
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- CN104311258A CN104311258A CN201410516693.XA CN201410516693A CN104311258A CN 104311258 A CN104311258 A CN 104311258A CN 201410516693 A CN201410516693 A CN 201410516693A CN 104311258 A CN104311258 A CN 104311258A
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- 239000003337 fertilizer Substances 0.000 title claims abstract description 83
- 239000002245 particle Substances 0.000 title claims abstract description 57
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 title claims abstract description 39
- 229940072033 potash Drugs 0.000 title claims abstract description 39
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 title claims abstract description 39
- 235000015320 potassium carbonate Nutrition 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 238000001125 extrusion Methods 0.000 claims abstract description 51
- 238000002156 mixing Methods 0.000 claims abstract description 47
- 238000005469 granulation Methods 0.000 claims abstract description 19
- 230000003179 granulation Effects 0.000 claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 18
- 235000015097 nutrients Nutrition 0.000 claims abstract description 7
- 229910052700 potassium Inorganic materials 0.000 claims description 34
- 239000011591 potassium Substances 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 33
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 31
- 238000007906 compression Methods 0.000 claims description 31
- 230000006835 compression Effects 0.000 claims description 31
- 239000000203 mixture Substances 0.000 claims description 21
- 239000012752 auxiliary agent Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 235000021049 nutrient content Nutrition 0.000 claims description 9
- 238000005453 pelletization Methods 0.000 claims description 9
- 239000006185 dispersion Substances 0.000 claims description 8
- 238000004898 kneading Methods 0.000 claims description 7
- 238000012856 packing Methods 0.000 claims description 7
- 239000013543 active substance Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 4
- 229920005552 sodium lignosulfonate Polymers 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- LSLPOLOMYRKLEG-UHFFFAOYSA-L disodium dodecanoic acid sulfate Chemical compound S(=O)(=O)([O-])[O-].[Na+].C(CCCCCCCCCCC)(=O)O.[Na+] LSLPOLOMYRKLEG-UHFFFAOYSA-L 0.000 claims description 3
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 3
- 150000003109 potassium Chemical class 0.000 claims description 3
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- 238000011284 combination treatment Methods 0.000 claims description 2
- 239000008188 pellet Substances 0.000 claims 1
- 239000000654 additive Substances 0.000 abstract 1
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 14
- 239000008187 granular material Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 238000013268 sustained release Methods 0.000 description 4
- 239000012730 sustained-release form Substances 0.000 description 4
- 238000005054 agglomeration Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 3
- 229910052939 potassium sulfate Inorganic materials 0.000 description 3
- 235000011151 potassium sulphates Nutrition 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 235000013339 cereals Nutrition 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010981 drying operation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000004720 fertilization Effects 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000003979 granulating agent Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000009343 monoculture Methods 0.000 description 1
- 239000000618 nitrogen fertilizer Substances 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002686 phosphate fertilizer Substances 0.000 description 1
- 230000029553 photosynthesis Effects 0.000 description 1
- 238000010672 photosynthesis Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000036314 physical performance Effects 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 235000020985 whole grains Nutrition 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
The invention relates to a preparation method for potash fertilizer particles. The preparation method is characterized in that the potash fertilizer particles are pelletized by a two-stage mixing extruder, potash fertilizer powder and additives are rapidly refined, scattered and mixed due to the strong shear force of the high rotation speed screw of a first-stage twin screw mixing mill, and then enter a second-stage single screw extruder through exhaust, the output end can conduct high pressure stable extrusion at a low rotation speed, and finally, pelleting is carried out by a die surface pelletizer to obtain the potash fertilizer particles. The potash fertilizer particles have high nutrient concentration, are regular in shape and uniform in diameter, and have high strength and good slow release performance. The preparation method is simple to operate, has strong technological adaptability, consumes little energy, has high granulation rate and high yield, and has market application value.
Description
Technical field
The present invention relates to a kind of preparation method of potassium fertilizer particle, in particular, the present invention relates to a kind of two steps type mixing extrusion unit of applying to the method for potash fertilizer granulation, belong to potash fertilizer granulation field.
Background technology
Potash fertilizer is one of three large chemical fertilizer kinds, potassium element is one of indispensable element of plant, in the growth and development process of plant, potassium participates in the processes such as photosynthesis, the transport of assimilation product, the synthesis of protein directly, and the annual potash fertilizer consumption of China is more than 5,000,000 tons.Common potash fertilizer such as Repone K, potassium sulfate, saltpetre, plant ash etc. are Powdered, excessively stored for a long timely put the moisture absorption and lump.
Powdered potash fertilizer physicals is not good, and easily play dirt during handling, long storage time is easily lumpd, poor fluidity, apply fertilizer extremely inconvenient, meanwhile, powder fertilizer directly use with soil after, the too fast release of nutrient, crop of easily burning, is not very easily run off by the nutrient absorbed in time and causes environmental pollution.Along with the development of science and technology, agrotechnically to constantly bring forth new ideas, all kinds of agricultural machine is widely used in extensive large-area farmland, conveniently mechanized application, granular fertilizer has become the development trend of current chemical fertilizer, because it has good physical performance than common powdered fertilizer, dirt is not played during handling, long-term storage is not lumpd, good fluidity, easy uniformly dispersing during fertilising, be easy to the advantage realizing mechanical fertilization, and, granular fertilizer then has certain slow releasing function, improve the utility ratio of fertilizer nutrient, simultaneously monoculture divides other granular fertilizers that granular fertilizer can be close with granular size directly to mix to be mixed with mixed fertilizer.At present, China's granulated phosphate fertilizer and nitrogenous fertilizer have had certain industrial scale, and Ye You company has introduced roll squeezer granulating equipment technology and carried out granulation to potash fertilizer, although filled up the blank of China's granular potash fertilizer, limits throughput, still need to rely on a large amount of import.
Extruding pelletization is shaping to be completed by screw extrusion press, it is that heating material is melted to viscous state, by the powerful 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.The method has following features: 1.. continuous prodution; 2.. very high productivity; 3.. applied range; 4.. require less investment while yielding quicker results.Single screw extrusion machine energy consumption is low, and performance is good, and noise is low, and bearing capacity is large, and smooth running, extrude stable, output is high.Twin screw extruder has that shearing force is large, heat transfer area is large, accurate measurement, feed performance are good, is suitable for raw material processing, melting effect is good, exhaust and reaction effect good, there is the advantages such as self-cleaning function simultaneously.
Two steps type mixing extrusion unit is that twin screw extruder and single screw extrusion machine organically combine, and two sections of rotating speeds can independently regulate and control, and make both output reach balance, Technological adaptability is strong, possesses two kinds of screw extrusion press advantages simultaneously.First rank are twin screw extruder, and the design of machine barrel, screw combinations is changeable, makes material forced conveyance, efficiently mixing, shear dispersion; Second-order is single screw extrusion machine, screw rod low speed rotation, and material is mixing lentamente, and low sheraing builds high pressure, stably extruding pelletization.Twin screw and singe screw combine, and by technological process Function Decomposition, add independent operation variable, are conducive to the step-by-step optimization of each technological process.Two steps type mixing extrusion unit has equipment less energy-consumption, and product is high quality, the feature of high yield.
Patent CN 201310528939.0 discloses a kind of manufacture method of high density rounded grain Repone K; the method granulation step is: Repone K raw material and granulating agent are mixed the broken laggard granulating equipment that enters to reunite (rotary drum granulator, granulating disc); united pelleting process routinely carries out agglomeration granulation; gained particle drying, cooling, screening; obtain high density rounded grain Repone K, and provide the material composition of granulation aid: polyacrylamide, water glass and borax.This prilling process is wet agglomeration comminution granulation, adds water mix wetting in granulation process, and at granulating together of reuniting, in granulation process, moisture is in granule interior, cause gained particle drying difficulty, consume energy high, in addition, the shortcomings such as the method gained particle appearance is poor, uneven, and intensity is lower.
Patent CN201010175892.0 discloses a kind of method that roller press type produces potassium fertilizer particle, and 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 inefficiency, output is little.
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, without the need to drying, consume energy low, can carry out continuous seepage, output is high, and granulating rate is high, and the high production technology route of gained potassium fertilizer particle intensity and method are significant to China's granulating potash fertilizer technology and market application.
Summary of the invention
The present invention is directed in above-mentioned patent, technique drying operation difficulty, the appearance poor of agglomeration granulation, particle is uneven, intensity is low, the shortcomings such as roller extruder method production efficiency is low, output is little, and melting sprinkling pelleting cost is high, power consumption is high, provide a kind of preparation method of potassium fertilizer particle.Potassium fertilizer particle of the present invention is obtained by the granulation of two steps type mixing extrusion unit after being mixed by potash fertilizer powder and auxiliary agent, and this potassium fertilizer particle regular shape, uniform particle sizes, intensity is high, has good sustained release performance.The present invention is simple to operate, and Technological adaptability is strong, and less investment, energy consumption is low, and granulating rate is high, and output is high, has great marketable value.
Technical scheme of the present invention is as follows:
A preparation method for potassium fertilizer particle, is characterized in that: this potassium fertilizer particle be by potash fertilizer powder and auxiliary agent all with mix after, obtained by two steps type mixing extrusion unit extruding pelletization, working method is as follows:
1) taking potash fertilizer powder 93% ~ 97% and auxiliary agent 3% ~ 7% by mass percentage sends in high-speed mixer, combination treatment 15 ~ 30 minutes under normal temperature, make each component materials and auxiliary agent dispersed, form mixture;
2) mixture is sent into two steps type mixing extrusion unit, under the threaded rod shear shear force of twin screw compounder and the effect of auxiliary agent, carry out refinement dispersion, mixing, entering single screw extrusion machine after exhaust, to carry out low velocity shear mixing, sets up high-voltage-stable and extrude;
3) material through singe screw die extrusion carries out pelletizing by die face pelletier, after obtaining the particle of regular uniform, carries out packing or storing.
The preparation method of above-mentioned potassium fertilizer particle, described potassium fertilizer particle particle diameter is 2 ~ 5mm, and intensity is 40 ~ 60N, potash fertilizer content is 93% ~ 97%, and nutrient content is 48% ~ 56%, slow-releasing 28 days accumulative nutrients release≤80%.
The preparation method of above-mentioned potassium fertilizer particle, in described two steps type mixing extrusion unit, first rank are high speed intermeshing co-rotating twin-screw mixing roll, and screw diameter is 35 ~ 95mm, and length-to-diameter ratio is 20 ~ 36:1, rotating speed is 100 ~ 500 r/min, screw combinations comprises feeding section, compression section, melt zone, exhaust section, and barrel temperatures set interval is 100 ~ 160 DEG C, and machine barrel bulk temperature is in the trend of falling after rising, melt zone temperature is the highest, and exhaust section machine barrel is provided with linker and connects second-order forcing machine; Second-order is low speed single screw extrusion machine, screw diameter is 100 ~ 200mm, length-to-diameter ratio is 7 ~ 20:1, rotating speed is 60 ~ 120 r/min, screw rod comprises feed zone, compression section, homogenizing zone, barrel temperatures set interval is 90 ~ 160 DEG C, and machine barrel bulk temperature is in the trend of falling after rising, and compression section temperature is the highest.
The preparation method of above-mentioned potassium fertilizer particle, the first described twin screw compounder Screw Extrusion compression section, rank is provided with 2 ~ 3 groups of compression threaded blocks, and melt zone is provided with 2 ~ 3 groups of forward kneading blocks; Described second-order single screw extrusion machine machine head port mould is circular orifices mould, and aperture is 3 ~ 4mm, is 80 ~ 150 DEG C between temperature setting district, and relative machine barrel homogenizing zone temperature is low 10 ~ 20 DEG C.
The preparation method of above-mentioned potassium fertilizer particle, described auxiliary agent is tensio-active agent: water is the mixture of 2 ~ 4:1, by percentage to the quality, accounts for 3% ~ 7% of granulation material; Potash fertilizer powder and auxiliary agent mass percent sum are 100%.
The preparation method of above-mentioned potassium fertilizer particle, described tensio-active agent is the one in sodium lignosulfonate, lauric acid sodium sulfate, Sodium dodecylbenzene sulfonate, polyoxyethylenated alcohol sodium sulfate.
Potash fertilizer granulation is combined with two steps type mixing extrusion unit by the present invention, after potash fertilizer powder and auxiliary agent Homogeneous phase mixing, send into two steps type mixing extrusion unit, first through the first rank twin screw compounder, under the screw acting of its high speed rotating, material obtains forced conveyance, refinement disperses, efficiently mixing, shear, potash fertilizer powder is made to be provided with certain wettability and plasticity-, then second-order single screw extrusion machine is entered through exhaust, screw rod low speed rotation, make material mixing lentamente, low sheraing, set up high pressure, stably extruding pelletization, prepare regular particles, excellent performance, the granular potash fertilizer that intensity is high.
The present invention's auxiliary agent used is the mixture of tensio-active agent and water, and under twin screw compounder high shear forces, tensio-active agent and water diffuse into fast and soaks potash fertilizer powder, potash fertilizer powder is reached have certain can the effect of working plasticity.
The present invention has following outstanding feature and beneficial effect:
1, the present invention completes granulation by two steps type mixing extrusion unit to potash fertilizer powder, and automation degree of equipment is high, can continuous seepage, and Technological adaptability is strong, and efficiency is high, and granulating rate is high, and output is high.
2, the invention belongs to non-slurry pelletizing, gained granule interior moisture is few, does not need extra drying treatment, and technique is simple, consumes energy low.
3, the present invention is seldom adjuvant used, and water molecules will be removed in granulation process, and the potassium fertilizer particle nutrient content obtained is high, low production cost.
4, the potassium fertilizer particle that the present invention produces has regular shape, and intensity is high, the feature of had good sustained release effect, particle diameter 2 ~ 5mm, is easy to other granular fertilizer mixtures close with granular size, meets mechanized application requirement.
5, production process of the present invention is simple, and constant product quality is with low cost, is suitable for industrialization and produces, have market using value.
Table one, each performance index of product of the present invention.
| Particle size | Granule strength | Granular potash fertilizer content | Particle nutrient content | Sustained release performance |
| 2~5mm | 40~60 N | 93%~97% | 48%~56% | 28 days accumulative nutrients release≤80% |
In table one, potassium fertilizer particle potassium nutrition content >=40% of the present invention, sustained release performance meets the requirement index of GB/T23348-2009 slow release fertilizer.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
In figure, 1 is prepare potash fertilizer powder and auxiliary agent; 2 be potash fertilizer powder and auxiliary agent take burden process; 3 is mixed processes of potash fertilizer powder and auxiliary agent; 4 is mixing extrusion operations; 4a is mixing extrusion operation first rank twin-screw mixer; 4b is mixing extrusion operation single order second order linker; 4c is mixing extrusion operation second-order Single screw extrusion; 5 is pelletizing operations; 6 is packaging or storage procedure.
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.
embodiment 1
1) take Repone K 93kg, sodium lignosulfonate 5kg, water 2kg sends into after high mixer mixes 15 minutes and obtains mixture.
2) mixture is sent into two steps type mixing extrusion unit, the first rank twin screw compounder: screw diameter is 35mm, length-to-diameter ratio is 24:1, and compression section is provided with 2 groups of compression threaded blocks, and melt zone is provided with 2 groups of forward kneading blocks; Second-order single screw extrusion machine: screw diameter is 100mm, length-to-diameter ratio is 7:1, and mouth nib footpath is 3mm.
3) the first rank twin screw compounder machine barrel each section of temperature is set to: feeding section 100 DEG C, 110 DEG C, compression section, melt zone 120 DEG C, exhaust section 120 DEG C, and screw speed is set as 500 r/min; Second-order extruder cylinder of single screw extruder each section of temperature is set as: feed zone 110 DEG C, 120 DEG C, compression section, homogenizing zone 110 DEG C, and die temperature is set to 100 DEG C, and screw speed is set as 60 r/min.
4) material is through the first rank twin screw compounder refinements dispersion, mixing, entering second-order single screw extrusion machine by linker after exhaust, to carry out low velocity shear mixing, set up high pressure, die face cutting is carried out by mouth mould steady extruding, obtain qualified potassium fertilizer particle: particle diameter 2 ~ 4mm, nutrient content 53, granule strength 59N, then packing and storing.
embodiment 2
1) take potassium sulfate 94kg, lauric acid sodium sulfate 4kg, water 2kg send into after high mixer mixes 20 minutes and obtain mixture.
2) mixture is sent into two steps type mixing extrusion unit, the first rank twin screw compounder: screw diameter is 45mm, length-to-diameter ratio is 26:1, and compression section is provided with 2 groups of compression threaded blocks, and melt zone is provided with 2 groups of forward kneading blocks; Second-order single screw extrusion machine: screw diameter is 120mm, length-to-diameter ratio is 10:1, and mouth nib footpath is 4mm.
3) the first rank twin screw compounder machine barrel each section of temperature is set to: feeding section 110 DEG C, 120 DEG C, compression section, melt zone 130 DEG C, exhaust section 120 DEG C, and screw speed is set as 400 r/min; Second-order extruder cylinder of single screw extruder each section of temperature is set as: feed zone 120 DEG C, 130 DEG C, compression section, homogenizing zone 110 DEG C, and die temperature is set to 100 DEG C, and screw speed is set as 80 r/min.
4) material is through the first rank twin screw compounder refinements dispersion, mixing, entering second-order single screw extrusion machine by linker after exhaust, to carry out low velocity shear mixing, set up high pressure, die face cutting is carried out by mouth mould steady extruding, obtain qualified potassium fertilizer particle: particle diameter 3 ~ 5mm, nutrient content 49, granule strength 54N, then packing and storing.
embodiment 3
1) take Repone K 96kg, polyoxyethylenated alcohol sodium sulfate 3kg, water 1kg sends into after high mixer mixes 20 minutes and obtains mixture.
2) mixture is sent into two steps type mixing extrusion unit, the first rank twin screw compounder: screw diameter is 55mm, length-to-diameter ratio is 28:1, and compression section is provided with 2 groups of compression threaded blocks, and melt zone is provided with 3 groups of forward kneading blocks; Second-order single screw extrusion machine: screw diameter is 150mm, length-to-diameter ratio is 7:1, and mouth nib footpath is 3mm.
3) the first rank twin screw compounder machine barrel each section of temperature is set to: feeding section 120 DEG C, 130 DEG C, compression section, melt zone 140 DEG C, exhaust section 120 DEG C, and screw speed is set as 300 r/min; Second-order extruder cylinder of single screw extruder each section of temperature is set as: feed zone 120 DEG C, 130 DEG C, compression section, homogenizing zone 120 DEG C, and die temperature is set to 110 DEG C, and screw speed is set as 90 r/min.
4) material is through the first rank twin screw compounder refinements dispersion, mixing, entering second-order single screw extrusion machine by linker after exhaust, to carry out low velocity shear mixing, set up high pressure, die face cutting is carried out by mouth mould steady extruding, obtain qualified potassium fertilizer particle: particle diameter 2 ~ 4mm, nutrient content 54, granule strength 51N, then packing and storing.
embodiment 4
1) take potassium sulfate 95kg, Sodium dodecylbenzene sulfonate 3kg, water 2kg sends into after high mixer mixes 25 minutes and obtains mixture.
2) mixture is sent into two steps type mixing extrusion unit, the first rank twin screw compounder: screw diameter is 35mm, length-to-diameter ratio is 24:1, and compression section is provided with 2 groups of compression threaded blocks, and melt zone is provided with 2 groups of forward kneading blocks; Second-order single screw extrusion machine: screw diameter is 100mm, length-to-diameter ratio is 7:1, and mouth nib footpath is 4mm.
3) the first rank twin screw compounder machine barrel each section of temperature is set to: feeding section 100 DEG C, 110 DEG C, compression section, melt zone 120 DEG C, exhaust section 120 DEG C, and screw speed is set as 300 r/min; Second-order extruder cylinder of single screw extruder each section of temperature is set as: feed zone 110 DEG C, 120 DEG C, compression section, homogenizing zone 110 DEG C, and die temperature is set to 100 DEG C, and screw speed is set as 100 r/min.
4) material is through the first rank twin screw compounder refinements dispersion, mixing, entering second-order single screw extrusion machine by linker after exhaust, to carry out low velocity shear mixing, set up high pressure, die face cutting is carried out by mouth mould steady extruding, obtain qualified potassium fertilizer particle: particle diameter 3 ~ 5mm, nutrient content 50, granule strength 48N, then packing and storing.
embodiment 5
1) take Repone K 97kg, sodium lignosulfonate 2kg, water 1kg sends into after high mixer mixes 30 minutes and obtains mixture.
2) mixture is sent into two steps type mixing extrusion unit, the first rank twin screw compounder: screw diameter is 35mm, length-to-diameter ratio is 24:1, and compression section is provided with 2 groups of compression threaded blocks, and melt zone is provided with 2 groups of forward kneading blocks; Second-order single screw extrusion machine: screw diameter is 100mm, length-to-diameter ratio is 7:1, and mouth nib footpath is 3mm.
3) the first rank twin screw compounder machine barrel each section of temperature is set to: feeding section 100 DEG C, 110 DEG C, compression section, melt zone 120 DEG C, exhaust section 120 DEG C, and screw speed is set as 200 r/min; Second-order extruder cylinder of single screw extruder each section of temperature is set as: feed zone 110 DEG C, 120 DEG C, compression section, homogenizing zone 110 DEG C, and die temperature is set to 100 DEG C, and screw speed is set as 120 r/min.
4) material is through the first rank twin screw compounder refinements dispersion, mixing, entering second-order single screw extrusion machine by linker after exhaust, to carry out low velocity shear mixing, set up high pressure, die face cutting is carried out by mouth mould steady extruding, obtain qualified potassium fertilizer particle: particle diameter 2 ~ 4mm, nutrient content 56, granule strength 43N, then packing and storing.
Claims (6)
1. the preparation method of a potassium fertilizer particle, it is characterized in that: this potassium fertilizer particle is by after potash fertilizer powder and auxiliary agent Homogeneous phase mixing, obtained by two steps type mixing extrusion unit extruding pelletization, potash fertilizer powder disperses through refinement in the first rank twin screw compounder, mixing process, then enter the compression of second-order single screw extrusion machine and extrude pelletizing, its working method is as follows:
1) take potash fertilizer powder by mass percentage and auxiliary agent adds in high-speed mixer, combination treatment 15 ~ 30 minutes, make each component materials and auxiliary agent dispersed, form mixture;
2) mixture is added in two steps type mixing extrusion unit, under the threaded rod shear shear force of twin screw compounder and the effect of auxiliary agent, carry out refinement dispersion, mixing, entering second-order single screw extrusion machine after exhaust, to carry out low velocity shear mixing, sets up high-voltage-stable and extrude;
3) material through singe screw die extrusion carries out granulation by die face pellet cutters, after obtaining the particle of regular uniform, carries out packing or storing.
2. the preparation method of potassium fertilizer particle according to claim 1, is characterized in that: described potassium fertilizer particle particle diameter is 2 ~ 5mm, and intensity is 40 ~ 60N, potash fertilizer content is 93% ~ 97%, and nutrient content is 48% ~ 56%, slow-releasing 28 days accumulative nutrients release≤80%.
3. the preparation method of potassium fertilizer particle according to claim 1, it is characterized in that: in described two steps type mixing extrusion unit, first rank are high speed intermeshing co-rotating twin-screw mixing roll, screw diameter is 35 ~ 95mm, length-to-diameter ratio is 20 ~ 36:1, rotating speed is 100 ~ 500 r/min, screw combinations comprises feeding section, compression section, melt zone, exhaust section, barrel temperatures set interval is 100 ~ 160 DEG C, machine barrel bulk temperature is in the trend of falling after rising, melt zone temperature is the highest, and exhaust section machine barrel is provided with linker and connects second-order forcing machine; Second-order is low speed single screw extrusion machine, screw diameter is 100 ~ 200mm, length-to-diameter ratio is 7 ~ 20:1, rotating speed is 60 ~ 120 r/min, screw rod comprises feed zone, compression section, homogenizing zone, barrel temperatures set interval is 90 ~ 160 DEG C, and machine barrel bulk temperature is in the trend of falling after rising, and compression section temperature is the highest.
4. the preparation method of potassium fertilizer particle according to claim 2, is characterized in that: the first described twin screw compounder Screw Extrusion compression section, rank is provided with 2 ~ 3 groups of compression threaded blocks, and melt zone is provided with 2 ~ 3 groups of forward kneading blocks; Described second-order single screw extrusion machine machine head port mould is circular orifices mould, and aperture is 3 ~ 4mm, is 80 ~ 150 DEG C between temperature setting district, and relative machine barrel homogenizing zone temperature is low 10 ~ 20 DEG C.
5. the preparation method of potassium fertilizer particle according to claim 1, is characterized in that: described auxiliary agent is tensio-active agent: water is the mixture of 2 ~ 4:1, by percentage to the quality, accounts for 3% ~ 7% of granulation material; Potash fertilizer powder and auxiliary agent mass percent sum are 100%.
6. the preparation method of potassium fertilizer particle according to claim 4, is characterized in that: described tensio-active agent is the one in sodium lignosulfonate, lauric acid sodium sulfate, Sodium dodecylbenzene sulfonate, polyoxyethylenated alcohol sodium sulfate.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107434746A (en) * | 2017-09-12 | 2017-12-05 | 四川鑫圣生物科技有限公司 | A kind of special fertilizer for cole and preparation method thereof |
| 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1145059A (en) * | 1994-12-12 | 1997-03-12 | 宋美莹 | The controlled release matrix-type fertilizer and the process of preparation therefor |
| CN101993270A (en) * | 2009-08-12 | 2011-03-30 | 深圳市芭田生态工程股份有限公司 | Method for preparing compound fertilizer and product thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1145059A (en) * | 1994-12-12 | 1997-03-12 | 宋美莹 | The controlled release matrix-type fertilizer and the process of preparation therefor |
| CN101993270A (en) * | 2009-08-12 | 2011-03-30 | 深圳市芭田生态工程股份有限公司 | Method for preparing compound fertilizer and product thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107434746A (en) * | 2017-09-12 | 2017-12-05 | 四川鑫圣生物科技有限公司 | A kind of special fertilizer for cole and preparation method thereof |
| 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 |
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