CN109956763A - A kind of method and potassium sulfate prilling process improving granular potassium sulfate intensity - Google Patents
A kind of method and potassium sulfate prilling process improving granular potassium sulfate intensity Download PDFInfo
- Publication number
- CN109956763A CN109956763A CN201811551150.6A CN201811551150A CN109956763A CN 109956763 A CN109956763 A CN 109956763A CN 201811551150 A CN201811551150 A CN 201811551150A CN 109956763 A CN109956763 A CN 109956763A
- Authority
- CN
- China
- Prior art keywords
- potassium sulfate
- granular
- intensity
- extrusion granulation
- raw material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 title claims abstract description 199
- 229910052939 potassium sulfate Inorganic materials 0.000 title claims abstract description 196
- 235000011151 potassium sulphates Nutrition 0.000 title claims abstract description 196
- 238000000034 method Methods 0.000 title claims abstract description 91
- 239000000463 material Substances 0.000 claims abstract description 77
- 238000005469 granulation Methods 0.000 claims abstract description 51
- 230000003179 granulation Effects 0.000 claims abstract description 51
- 238000001125 extrusion Methods 0.000 claims abstract description 48
- 239000002994 raw material Substances 0.000 claims abstract description 30
- 230000001788 irregular Effects 0.000 claims abstract description 29
- 238000001035 drying Methods 0.000 claims abstract description 28
- 238000002156 mixing Methods 0.000 claims abstract description 20
- 238000005507 spraying Methods 0.000 claims abstract description 18
- 238000012216 screening Methods 0.000 claims abstract description 13
- 230000000903 blocking effect Effects 0.000 claims abstract description 6
- 239000000243 solution Substances 0.000 claims description 71
- 239000002245 particle Substances 0.000 claims description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 238000004519 manufacturing process Methods 0.000 claims description 22
- 239000008187 granular material Substances 0.000 claims description 17
- 239000000047 product Substances 0.000 claims description 16
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical group [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 12
- 239000011591 potassium Substances 0.000 claims description 10
- 229910052700 potassium Inorganic materials 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 8
- 239000012267 brine Substances 0.000 claims description 7
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 7
- 238000005119 centrifugation Methods 0.000 claims description 6
- 239000012065 filter cake Substances 0.000 claims description 4
- 239000013067 intermediate product Substances 0.000 claims description 4
- 238000007873 sieving Methods 0.000 claims description 4
- 239000000706 filtrate Substances 0.000 claims description 3
- 239000011343 solid material Substances 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 10
- 239000003337 fertilizer Substances 0.000 description 11
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 9
- 239000005864 Sulphur Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000000428 dust Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- ILRLTAZWFOQHRT-UHFFFAOYSA-N potassium;sulfuric acid Chemical compound [K].OS(O)(=O)=O ILRLTAZWFOQHRT-UHFFFAOYSA-N 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000013268 sustained release Methods 0.000 description 2
- 239000012730 sustained-release form Substances 0.000 description 2
- 241001131796 Botaurus stellaris Species 0.000 description 1
- 206010013786 Dry skin Diseases 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000003665 fog water Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/006—Coating of the granules without description of the process or the device by which the granules are obtained
-
- 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
Abstract
The present invention is a kind of method for improving granular potassium sulfate intensity, and this method is to improve granular potassium sulfate intensity by being dried again after spraying potassium sulfate solution to granular potassium sulfate surface.The invention also discloses a kind of irregular extrusion granulation methods of potassium sulfate, are that raw material carries out irregular extrusion granulation, including raw material mixing, material squeeze, material is broken and screening drying with potassium sulfate；It is by material extrusion process that material extrusion granulation is blocking, workshop section is crushed and sieved by material obtains granulation product.The method of the present invention can greatly improve the intensity of granular potassium sulfate by being dried after spraying potassium sulfate solution to granular potassium sulfate surface.It can also realize under the premise of not adding Chemical Felter simultaneously, potassium sulfate material extrusion granulation is realized by the method for further controlling material process conditions, process flow.By further controlling the mass ratio of moisture and dry material, realizes the irregular extrusion granulation of potassium sulfate, obtain the granular potassium sulfate product that intensity is high, roundness is good.
Description
Technical field
The present invention relates to a kind of powdered fertilizer granulating technique, especially a kind of method for improving granular potassium sulfate intensity；This
Invention further relates to a kind of irregular extrusion granulation method of potassium sulfate.
Background technique
Since granular fertilizers have the advantages that convenient transportation, fertilising convenience, sustained release effect, powdery compared to powdered fertilizer
Chemical fertilizer granule chemical conversion is the development trend of fertilizer industry.The method of fertilizer granulation has drum granulating, agglomeration granulation, extrusion granulation etc.
It is a variety of, wherein extrusion granulation due to its reduce energy consumption, reduce investment outlay and the unique advantages such as environmental protection and be widely used in chemical fertilizer and make
Grain technique.
Extrusion granulation is divided into rule according to the product produced again and is granulated and irregular granulation.Rule is granulated of i.e. production
Grain is the spherical particle of uniform rules, and key processing equipment extruder is spherical roller die to the roller skin of roller, and powdered fertilizer is squeezing
When pressure under the action of spherical shape model, unified, regular spheric granules is squeezed out；Irregular be granulated is extruder to roller roller skin
Smooth no mould, the material squeezed out are smooth thin block material.Uniform sizes range is produced by crushing and screening technique
Particle.The invention belongs to the irregular extrusion granulations of potassium sulfate.
Graininess potassium sulfate currently produced on the market is to carry out granulation production using powdered potassium sulfate finished product as raw material.
China's major part potassium sulfate production is produced and is contained by series of processes such as conversion decomposition flotation crystallizations using salt lake bittern as raw material
Higher (30% ~ 50%) potassium sulfate of water then obtains standard compliant potassium sulfate through dewatering process such as filtering, centrifugation, dryings and produces
Product.And the raw material of extrusion production graininess potassium sulfate is the potassium sulfate containing a small amount of moisture.Most of manufacturing enterprises mistake herein
Potassium sulfate material is first dehydrated in journey, it is dry, moisture is added again when then producing granular potassium sulfate, causes industrial energy consumption
Huge waste.
Since potassium sulfate nature characteristic causes its extruding plasticity very poor, the still not more mature sulphur of existing market
The sour irregular prilling of potassium, mostly use greatly universal extruding-it is broken-screening-drying-polishing-packs other compound fertilizer granulatings
Technique, and Chemical Felter enhancing granule strength is added in potassium sulfate powder.The shortcomings that above-mentioned technique be material before packing
Returning charge is more, production procedure is unsmooth, and it is more that material one-pass molding rate is too low and production process dust is excessive, production cost is excessive etc.
Aspect problem；And addition Chemical Felter not only increases production cost, and affects the purity of potassium sulfate fertilizers, part is viscous
Tying agent influences the effect of potassium sulfate sustained release, and has certain negative effect to the growth of crops.
The drawbacks of irregular extrusion granulation production potassium sulfate process is due to crushing and screening technique, the granule roundness produced
Poor, grain graininess size is uneven, in irregular shape, and when fertilising easily leads to going out for lamination when blending with other compound fertilizers
It is existing, and the granule strength after physical impact is lower, and dusting is easily led in transportational process.
Summary of the invention
The technical problem to be solved by the present invention is in view of the deficiencies of the prior art, provide a kind of new raising potassium sulfate
The method of grain intensity, this method enhance material forming by control process conditions under the premise of not adding Chemical Felter
Grain intensity.
That there is provided a kind of is irregular using the potassium sulfate of preceding method for another technical problem to be solved by this invention
Extrusion granulation method.
The technical problem to be solved by the present invention is to what is realized by technical solution below.The present invention is a kind of raising
The method of granular potassium sulfate intensity, its main feature is that: this method be by granular potassium sulfate surface spray potassium sulfate solution after again
It is dried to improve granular potassium sulfate intensity.
A kind of method improving granular potassium sulfate intensity of the present invention, further preferred technical solution is: institute
The mass concentration for the potassium sulfate solution stated is 3% or more, it is generally preferable to which mass concentration is the potassium sulfate solution of 3%-10%, most preferably
It is saturated potassium sulfate solution.The filtrate that the potassium sulfate solution is filtered using the potassium sulfate in brine production Process of Potassium Sulfate, or
Person's potassium sulfate is centrifuged the centrifugate of workshop section, or the potassium sulfate solution configured with water and potassium sulfate.Potassium sulfate solution is prepared with water
Raw material preferentially using be granulated production process in deduster recycling potassium sulfate dust, this part of sulfuric acid potassium dust (granularity is superfine)
Return system is unfavorable for the granulating and forming of potassium sulfate, and the special thin material in this part can more rapidly dissolve.Realize kalium slfuricum powder
The effective use of dirt.The mass ratio of the potassium sulfate solution and granular potassium sulfate is preferably 1 ~ 6:100, further preferably 3 ~
4:100.
The invention also discloses a kind of irregular extrusion granulation methods of potassium sulfate, its main feature is that: its step are as follows: with sulfuric acid
Potassium is that raw material carries out extrusion granulation, and granulation step includes raw material mixing, material squeezes, material is broken and screening drying；Pass through object
Expect that extrusion process is blocking by material extrusion granulation, workshop section is crushed and sieved by material and obtains granular potassium sulfate；Using the above skill
The method that granular potassium sulfate intensity is improved described in any one of art scheme, after being sprayed with potassium sulfate solution to granule materials,
It is dried again, granular potassium sulfate is made.
A kind of irregular extrusion granulation method of potassium sulfate of the present invention, further preferred technical solution is: institute
The raw material stated are as follows: the mixing of the intermediate product wet feed potassium sulfate composition of potassium sulfate powder product and brine production potassium sulfate process
Object, wet feed potassium sulfate are the solid material after filtered filter cake or centrifugation, and raw material is added suitable water to mixture when mixing and contains
Water reaches 1.5% ~ 3.0%；Further preferably 2% ~ 2.5%；Most preferably 2.1% ~ 2.3%.
A kind of irregular extrusion granulation method of potassium sulfate of the present invention, further preferred technical solution is: institute
The raw material stated are as follows: the raw material is potassium sulfate powder product, and suitable water or potassium sulfate solution is added in when mixing, and mixing is equal
It is even to reach 1.0% ~ 2.5%, further preferably 1.2% ~ 2.0%, most preferably 1.6% ~ 1.8% to mixture water content；When mixing
The mass concentration of potassium sulfate solution is added to be 3% or more, is preferably saturated potassium sulfate solution.
A kind of irregular extrusion granulation method of potassium sulfate of the present invention, further preferred technical solution is: water
Perhaps the addition form of potassium sulfate solution is in a mixer with the addition of spraying or steam or in the conveying glue for entering mixer
Addition spray head is taken to carry out adding water by spraying.
A kind of irregular extrusion granulation method of potassium sulfate of the present invention, further preferred technical solution is: institute
The material pressing method stated is as follows: being equipped with feed bin in extruder feed end, and the valve of control feed bin discharging speed is arranged, with strong
Feeding equipment processed carries out forced feeding to extruder, makes in extruder feed cavity full of material；The forced feed equipment is excellent
It is selected as screw(-type) feeder.Enter extruder by valve control discharging, guarantees the feed cavity of extruder full of material, strict control
Feed bin discharging speed is consistent with extruder treating capacity, and (feed bin discharging speed depends on the treating capacity of extruder, extruder treating capacity
Bigger, feed bin discharging speed is bigger).Guarantee that extruder squeezes out non-uniform thickness (3-5mm), the block material of consistent in density.It squeezes
Full feed ensures that material is squeezed before press squeezes roller compared with the air the extrusion granular material of limits, makes to have between granular material
There is certain pressure, is conducive to the effect and granule materials uniform sizes, the premise item for guaranteeing roundness of improving material extruding
Part.
A kind of irregular extrusion granulation method of potassium sulfate of the present invention, further preferred technical solution is: sulphur
Screening drying process in sour potassium granulation process includes primary screening, grain dressing drying and particle regrading；Wherein: primary
Method for sieving is classified material using the double-deck grading oscillating screen, is divided into less than 2mm, 2 ~ 5mm and the three parts greater than 5mm；
Material crushing section is back to greater than the part 5mm；Material mixing workshop section is back to less than the part 2mm；The part 2 ~ 5mm carries out particle
Finishing drying and particle regrading；Before grain dressing is dry, obtained particle is once sieved before entering drying drum, uses sulphur
Sour potassium solution is spraying to granule materials.A sieving technology before drying can return to underproof material, Optimizing Flow in advance
And save the cost；Screening after drying can return to the material broken into pieces during subsequent production, guarantee the matter of packaging product particle
Amount.
A kind of irregular extrusion granulation method of potassium sulfate of the present invention, further preferred technical solution is:
Grain finishing drying section uses drying drum, and concavo-convex liner plate is equipped on the drying drum inner wall.Increase particle and inner wall
Time of contact and contact area, particle can denude concave-convex liner plate when cylinder bottom is contacted with inner wall and is slowly rotated, improve
The roundness of particle.
A kind of method improving granular potassium sulfate intensity of the present invention, further preferred technical solution is:
Grain regrading obtains no more than 2mm and is greater than 2mm two parts；It is finished product greater than 2mm two parts, is returned no more than 2mm two parts
It returns raw material and mixes workshop section.
Compared with prior art, advantages of the present invention is as follows:
1, the method for the present invention then is dried by spraying potassium sulfate solution to granular potassium sulfate surface, can greatly improve sulphur
The intensity of sour k particle.
2, the present invention is not under the premise of adding Chemical Felter, by further controlling material process conditions, technique stream
The method of journey realizes potassium sulfate material extrusion granulation.By further controlling the mass ratio of moisture and dry material, realize
The irregular extrusion granulation of potassium sulfate, the high granular potassium sulfate of degree of obtaining intensity, and granular potassium sulfate obtained can have preferable circle
Whole degree.
3, the method for the present invention can use the intermediate product of production potassium sulfate (centrifugation after filtered filter cake or centrifugation be dry
Material) it is used as raw material, graininess potassium sulfate is produced, the energy consumption during dry materials can be greatly reduced, reduces particle sulphur
Sour potassium production cost.
Specific embodiment
The specific technical solution of the present invention described further below, in order to which those skilled in the art is further understood that
The present invention, without constituting the limitation to its right.
Embodiment 1, a method of granular potassium sulfate intensity being improved, this method is by spraying to granular potassium sulfate surface
It is dried again after potassium sulfate solution to improve granular potassium sulfate intensity.The mass concentration of potassium sulfate solution is 3%；The sulphur
The filtrate that sour potassium solution is filtered using the potassium sulfate in brine production Process of Potassium Sulfate；The potassium sulfate solution and potassium sulfate
The mass ratio of grain is 1:100.Granular potassium sulfate has been adopted after conventional method is granulated, and sprays 3% sulfuric acid to granular potassium sulfate surface
Potassium solution, then be dried.
Embodiment 2, a method of granular potassium sulfate intensity being improved, this method is by spraying to granular potassium sulfate surface
It is dried again after potassium sulfate solution to improve granular potassium sulfate intensity.The mass concentration of potassium sulfate solution is 8%；The sulphur
Sour potassium solution is centrifuged the centrifugate of workshop section using potassium sulfate in brine production Process of Potassium Sulfate；The potassium sulfate solution and sulfuric acid
The mass ratio of k particle is 6:100.Extrusion granulation is carried out by raw material of potassium sulfate, granulation step includes that raw material mixes, material squeezes
Pressure, material are broken and sieve drying；It is by material extrusion process that material extrusion granulation is blocking, by the way that material is broken and screener
Section obtains granular potassium sulfate；After being sprayed with 8% potassium sulfate solution to granule materials, then it is dried.
Embodiment 3, a method of granular potassium sulfate intensity being improved, this method is by spraying to granular potassium sulfate surface
It is dried again after saturation potassium sulfate solution to improve granular potassium sulfate intensity.The potassium sulfate solution water and potassium sulfate are matched
The saturation potassium sulfate solution set；The raw material of potassium sulfate solution is configured using the kalium slfuricum powder for being granulated deduster recycling in production process
Dirt, this part of sulfuric acid potassium dust (granularity is superfine) return system are unfavorable for the granulating and forming of potassium sulfate, and the special thin material in this part
It can more rapidly dissolve.The mass ratio of the potassium sulfate solution and granular potassium sulfate is 3:100.
Embodiment 4, a method of granular potassium sulfate intensity being improved, this method is by spraying to granular potassium sulfate surface
It is dried again after saturation potassium sulfate solution to improve granular potassium sulfate intensity.The potassium sulfate solution water and potassium sulfate are matched
The saturation potassium sulfate solution set；The mass ratio of the potassium sulfate solution and granular potassium sulfate is 4:100.
Embodiment 5, a kind of irregular extrusion granulation method of potassium sulfate, its step are as follows: being squeezed by raw material of potassium sulfate
Pressure is granulated, and granulation step includes raw material mixing, material squeezes, material is broken and screening drying；By material extrusion process by object
Expect that extrusion granulation is blocking, workshop section is crushed and sieved by material and obtains granular potassium sulfate；Using any one of embodiment 1-4
The method of the raising granular potassium sulfate intensity, after being sprayed with potassium sulfate solution to granule materials, then is dried, sulphur is made
Sour k particle.
Embodiment 6, in a kind of irregular extrusion granulation method of potassium sulfate described in embodiment 5: the raw material are as follows: sulfuric acid
The mixture of the intermediate product wet feed potassium sulfate composition of potassium powder product and brine production potassium sulfate process, wet feed potassium sulfate were
The solid material after filter cake or centrifugation after filter, raw material are added suitable water to mixture water content when mixing and reach 1.5%；Pass through
Material extrusion process is blocking by material extrusion granulation, and workshop section is crushed and sieved by material and obtains granular potassium sulfate；The object
Expect that pressing method is as follows: being equipped with feed bin in extruder feed end, and the valve of control feed bin discharging speed is set, use forced feed
Equipment carries out forced feeding to extruder, makes in extruder feed cavity full of material；The forced feed equipment is preferably spiral shell
Revolve batcher.After being sprayed with saturation potassium sulfate solution to granule materials, then it is dried.
Embodiment 7, in a kind of irregular extrusion granulation method of potassium sulfate described in embodiment 5: the raw material is sulfuric acid
Suitable potassium sulfate solution is added in potassium powder product, when mixing, is uniformly mixed to mixture water content and reaches 2.0%；Add when mixing
Enter potassium sulfate solution for saturation potassium sulfate solution.The addition form of potassium sulfate solution is to be added in a mixer with Sprayable,
Or spray head is added on the transportation rubber belt for entering mixer and spray and is added.By material extrusion process by material extrusion granulation at
Block is crushed and is sieved by material workshop section and obtains granular potassium sulfate；
The material pressing method is as follows: being equipped with feed bin in extruder feed end, and the valve of control feed bin discharging speed is arranged
Door, carries out forced feeding to extruder with forced feed equipment, makes in extruder feed cavity full of material；The forced feed
Equipment is preferably screw(-type) feeder.After being sprayed with saturation potassium sulfate solution to granule materials, then it is dried.
Screening drying process in potassium sulfate granulation process includes that primary screening, grain dressing be dry and the secondary sieve of particle
Point；Wherein: method for sieving is classified material using the double-deck grading oscillating screen, is divided into less than 2mm, 2 ~ 5mm and is greater than
The three parts of 5mm；Material crushing section is back to greater than the part 5mm；Material mixing workshop section is back to less than the part 2mm；2~5mm
Part carries out grain dressing drying and particle regrading；Before grain dressing is dried, it is dry in entrance once to sieve obtained particle
It is spraying to granule materials with potassium sulfate solution before dry rotating cylinder.
Grain dressing drying section uses drying drum, and concavo-convex liner plate is equipped on the drying drum inner wall；It is preferred that
Particle regrading obtain no more than 2mm and be greater than 2mm two parts；It is finished product greater than 2mm two parts, is not more than 2mm two
Divide and returns to raw material mixing workshop section.
Embodiment 8, a kind of method comparative experiments improving granular potassium sulfate intensity:
One, experiment purpose: investigated by carrying out different processing to granular potassium sulfate before it is dried to its intensity effect because
Element.
Two, testing equipment and method
Watch test method
Watch test device therefor and material
Three, experimental group and result:
1, experiment is divided into 6 groups: classified with spraying substance difference, is divided into:
(1) control group is not sprayed；
(2) water spray control group；
(3) potassium sulfate solution experimental group is sprayed, wherein distinguishing by the mass concentration of potassium sulfate solution are as follows:
Test one group: mass concentration 3%；
Test two groups: mass concentration 5%；
Test three groups: mass concentration 8%；
Test four groups: saturation potassium sulfate solution (mass concentration is 10.5% under experimental temperature).
2, experimentation:
Common potassium sulfate powder-product through extruder squeeze and after through it is broken, sieve after release mesh granular potassium sulfate
(undried) takes appropriate such granular potassium sulfate to carry out hydrojet comparative experiments.This part of sulfuric acid k particle is sampled, grouping.
A part is directly placed into 150 DEG C of baking oven half an hour, another part with aerial fog water jet particle surface uniformly spray suitable quantity of water or
Potassium sulfate solution makes to place into 150 DEG C of baking oven half an hour after its surface wet, is cooled to room temperature and carries out intensity survey to it
Examination.
3, experimental result: through intensity detection, the influence for spraying granule strength after the concentration and drying of substance is as shown in the table:
By the experimental results showed that, having sprayed the particle intensity after drying of potassium sulfate solution, not spray potassium sulfate significantly greater than molten
The intensity of liquid particle.And with the raising of spray solution concentration, particle mean intensity is increased, when adding saturated solution, sulphur
Sour k particle mean intensity about 70N/.Meanwhile the particle mean intensity after drying for spraying potassium sulfate solution is significantly greater than
The granular potassium sulfate intensity of water spray, achieves unexpected technical effect.
Granular potassium sulfate product quality can be increased substantially by spraying potassium sulfate solution, to promote granular potassium sulfate
Product competitiveness.
Claims (10)
1. a kind of method for improving granular potassium sulfate intensity, it is characterised in that: this method is by spraying to granular potassium sulfate surface
It is dried again after spilling potassium sulfate solution to improve granular potassium sulfate intensity.
2. a kind of method for improving granular potassium sulfate intensity according to claim 1, it is characterised in that: the potassium sulfate solution
Mass concentration is 3% or more, preferably saturation potassium sulfate solution.
3. a kind of method for improving granular potassium sulfate intensity according to claim 1, it is characterised in that: the potassium sulfate
Solution is centrifuged the centrifugate of workshop section using the filtrate or potassium sulfate of the potassium sulfate filtering in brine production Process of Potassium Sulfate, or
The potassium sulfate solution of person's water and potassium sulfate configuration；The mass ratio of the potassium sulfate solution and granular potassium sulfate is preferably 1 ~ 6:
100。
4. a kind of irregular extrusion granulation method of potassium sulfate, it is characterised in that: its step are as follows: being squeezed by raw material of potassium sulfate
Pressure is granulated, and granulation step includes raw material mixing, material squeezes, material is broken and screening drying；By material extrusion process by object
Expect that extrusion granulation is blocking, workshop section is crushed and sieved by material and obtains granular potassium sulfate；Appoint any one using claim 1-4
The method of raising granular potassium sulfate intensity described in, after being sprayed with potassium sulfate solution to granule materials, then is dried, is made
Granular potassium sulfate.
5. the irregular extrusion granulation method of potassium sulfate according to claim 4, it is characterised in that: the raw material is sulfuric acid
The mixture of the intermediate product wet feed potassium sulfate composition of potassium powder product and brine production potassium sulfate process, wet feed potassium sulfate were
The solid material after filter cake or centrifugation after filter, raw material are added suitable water to mixture water content when mixing and reach 1.5% ~ 3.0%.
6. the irregular extrusion granulation method of potassium sulfate according to claim 4, it is characterised in that: the raw material is described
Raw material be potassium sulfate powder product, suitable water or potassium sulfate solution is added in when mixing, is uniformly mixed aqueous to mixture
Amount reaches 1.0% ~ 2.5%；The mass concentration of potassium sulfate solution is added when mixing to be 3% or more, is preferably saturated potassium sulfate solution.
7. according to the irregular extrusion granulation method of the potassium sulfate of claim 5 or 6, it is characterised in that: water or potassium sulfate are molten
The addition form of liquid is to be added in a mixer with spraying or steam, or add spray head on the transportation rubber belt for entering mixer
It carries out adding water by spraying.
8. the irregular extrusion granulation method of potassium sulfate according to claim 4, it is characterised in that: the material extruding side
Method is as follows: being equipped with feed bin in extruder feed end, and the valve of control feed bin discharging speed is arranged, with forced feed equipment to crowded
Press carries out forced feeding, makes in extruder feed cavity full of material；The forced feed equipment is preferably screw(-type) feeder.
9. the irregular extrusion granulation method of potassium sulfate according to claim 4, it is characterised in that: in potassium sulfate granulation process
Screening drying process include that primary screening, grain dressing be dry and particle regrading；Wherein: a method for sieving is using double
Layer grading oscillating screen is classified material, is divided into less than 2mm, 2 ~ 5mm and the three parts greater than 5mm；It is returned greater than the part 5mm
To material crushing section；Material mixing workshop section is back to less than the part 2mm；The part 2 ~ 5mm carries out grain dressing drying and particle
Regrading；Before grain dressing is dry, obtained particle once is sieved before entrance drying drum, with potassium sulfate solution to particle
Material spray.
10. the irregular extrusion granulation method of potassium sulfate according to claim 9, it is characterised in that: grain dressing back tender
Duan Caiyong drying drum, and concavo-convex liner plate is equipped on the drying drum inner wall；Preferred particle regrading obtains less
In 2mm and it is greater than 2mm two parts；It is finished product greater than 2mm two parts, returns to raw material no more than 2mm two parts and mix workshop section.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017114180728 | 2017-12-25 | ||
| CN201711418072 | 2017-12-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109956763A true CN109956763A (en) | 2019-07-02 |
Family
ID=67023336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811551150.6A Pending CN109956763A (en) | 2017-12-25 | 2018-12-18 | A kind of method and potassium sulfate prilling process improving granular potassium sulfate intensity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109956763A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040189A (en) * | 1989-03-30 | 1990-03-07 | 王长山 | Compound fertilizer by spray granulating and manufacture method |
| CN102249766A (en) * | 2010-05-18 | 2011-11-23 | 国投新疆罗布泊钾盐有限责任公司 | Manufacture method of particle potash fertilizer |
| CN105130645A (en) * | 2015-09-02 | 2015-12-09 | 郑州大学 | Biological slow-release potash fertilizer and preparation method thereof |
| CN106220278A (en) * | 2016-07-27 | 2016-12-14 | 中化化肥有限公司成都研发中心 | A kind of additive improving potassium sulfate compound fertilizer granule strength and the preparation method of high-strength complex Hefei granule |
| CN107001169A (en) * | 2014-09-30 | 2017-08-01 | 钾肥和盐类集团钾肥有限公司 | Produce method, sulphate particle of thus obtained potassium of the sulphate particle of potassium and application thereof |
| CN108786655A (en) * | 2018-06-07 | 2018-11-13 | 国投新疆罗布泊钾盐有限责任公司 | A method of it improving potassium sulfate and is granulated intensity |
-
2018
- 2018-12-18 CN CN201811551150.6A patent/CN109956763A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040189A (en) * | 1989-03-30 | 1990-03-07 | 王长山 | Compound fertilizer by spray granulating and manufacture method |
| CN102249766A (en) * | 2010-05-18 | 2011-11-23 | 国投新疆罗布泊钾盐有限责任公司 | Manufacture method of particle potash fertilizer |
| CN107001169A (en) * | 2014-09-30 | 2017-08-01 | 钾肥和盐类集团钾肥有限公司 | Produce method, sulphate particle of thus obtained potassium of the sulphate particle of potassium and application thereof |
| CN105130645A (en) * | 2015-09-02 | 2015-12-09 | 郑州大学 | Biological slow-release potash fertilizer and preparation method thereof |
| CN106220278A (en) * | 2016-07-27 | 2016-12-14 | 中化化肥有限公司成都研发中心 | A kind of additive improving potassium sulfate compound fertilizer granule strength and the preparation method of high-strength complex Hefei granule |
| CN108786655A (en) * | 2018-06-07 | 2018-11-13 | 国投新疆罗布泊钾盐有限责任公司 | A method of it improving potassium sulfate and is granulated intensity |
Non-Patent Citations (3)
| Title |
|---|
| 于平年等: "硫酸钾挤压成型造粒试验研究", 《化工矿物与加工》 * |
| 张向宇: "《实用化学手册 第2版》", 31 October 2011, 国防工业出版社 * |
| 郭翔等: "提高颗粒硫酸钾强度的试验研究", 《化肥工业》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102718601B (en) | Large circular potassium chloride granule granulating auxiliary agent and preparation method | |
| CN106319246B (en) | Granulation method of fine-fraction titanium-rich material | |
| CN205613385U (en) | Architecture keramics shaping granulating system | |
| CN101670251A (en) | Method for preparing spherical anion surfactant | |
| CN104355778A (en) | Potassium fertilizer granules and granulating method thereof | |
| CN103553800A (en) | Production method of high-concentration potassium chloride pellet | |
| CN103664356A (en) | Pellet potash fertilizer pelletizing technology | |
| CN104529561A (en) | A round granular potash fertilizer and a preparation method thereof | |
| CN104529597A (en) | Method for producing compound fertilizer by extrusion-kneading process | |
| CN109890780A (en) | The particle of liquid containing ammonium sulfate, the method and system for producing it | |
| CN102464509A (en) | Preparation method of high-concentration round granular potash fertilizer | |
| CN109956763A (en) | A kind of method and potassium sulfate prilling process improving granular potassium sulfate intensity | |
| CN105904608B (en) | The wet granulation technology of urea-formaldehyde moulding powder | |
| CN205616801U (en) | Architecture keramics production line | |
| KR910009598B1 (en) | Granular potassium sulfate and its production | |
| CN107365180A (en) | Manufacture the production method of potassium magnesium sulfate particle and the purposes of potassium magnesium sulfate particle | |
| CN108786655A (en) | A method of it improving potassium sulfate and is granulated intensity | |
| CN109173926A (en) | A kind of method of improved drum granulating production granular complex fertilizer | |
| CN205821204U (en) | A kind of fertilizer production granule collating unit | |
| CN105080471A (en) | Nicotine adsorbent and preparation method thereof | |
| JPH0255397B2 (en) | ||
| CN105524352B (en) | A kind of calcium carbonate produced for PP materials, ardealite composite particles filler and preparation method thereof | |
| CN101289201A (en) | Method for preparing high-concentration round grainy potassium muriate | |
| CN105272383B (en) | A kind of spherical nitric acid calcium and magnesium and its manufacturing method | |
| CN209974643U (en) | Equipment for preparing full water-soluble round granular potassium sulfate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Shoujiang Inventor after: Jing Xiangyang Inventor after: Yao Mobai Inventor after: Yan Xiao Inventor after: Yu Pingnian Inventor after: Lin Jie Inventor before: Jing Xiangyang Inventor before: Yan Xiao Inventor before: Lin Jie |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20201118 Address after: No. 470 Tuanjie Road, Ruoqiang County, Bazhou, Xinjiang Uygur Autonomous Region Applicant after: SDIC XINJIANG LUOBUPO POTASH Co.,Ltd. Applicant after: BLUESTAR LEHIGH ENGINEERING INSTITUTE Co.,Ltd. Address before: 222000 No. 51 Chaoyang West Road, Haizhou District, Jiangsu, Lianyungang Applicant before: BLUESTAR LEHIGH ENGINEERING INSTITUTE Co.,Ltd. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190702 |