CN106220278A - A kind of additive improving potassium sulfate compound fertilizer granule strength and the preparation method of high-strength complex Hefei granule - Google Patents
A kind of additive improving potassium sulfate compound fertilizer granule strength and the preparation method of high-strength complex Hefei granule Download PDFInfo
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- CN106220278A CN106220278A CN201610599377.2A CN201610599377A CN106220278A CN 106220278 A CN106220278 A CN 106220278A CN 201610599377 A CN201610599377 A CN 201610599377A CN 106220278 A CN106220278 A CN 106220278A
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- Prior art keywords
- potassium sulfate
- compound fertilizer
- granule
- phosphoric acid
- strength
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B17/00—Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
Abstract
The invention discloses a kind of additive improving potassium sulfate compound fertilizer granule strength and the preparation method of high-strength complex Hefei granule, wherein the raw material of additive is made up of phosphoric acid,diluted, potassium sulfate solid, sulphuric acid；A kind of preparation method of high-strength complex Hefei granule, after phosphoric acid,diluted and potassium sulfate solid are stirred mixing, then with sulphuric acid and steam reaction, generate potassium acid sulfate, potassium sulfate and phosphoric acid melting slip；Described melt slurry is delivered to comminutor mouth be atomized, and through ammonia ammonification, carry out fertilizer spraying pelletize simultaneously；Compound fertilizer's material after spraying pelletize proceeds bonded pelleting in comminutor；Compound fertilizer's fertilizer drying after bonded pelleting, sieve, cool down and pack after obtain complex fertilizer product.A kind of additive improving potassium sulfate compound fertilizer granule strength of the present invention and the preparation method of high-strength complex Hefei granule, described additive applies in compound fertilizer granulating, can effectively strengthen the intensity of compound fertilizer granules, be substantially reduced the probability of efflorescence and caking.
Description
Technical field
The invention belongs to technical field of compound fertilizer production, specifically, relate to a kind of raising potassium sulfate type and be combined
The additive of fertile granule strength and the preparation method of high-strength complex Hefei granule.
Background technology
Traditional compound fertilizer production technology is mainly steam granule pelletize and drum dried, this traditional production technology master
Wanting raw material is carbamide, sulfur ammonium, ammonium chloride, MAP (powdery), triple superphosphate, general calcium, calcium magnesium phosphate, potassium sulfate, potassium chloride etc., this
A little raw materials are divided into the most again grittiness material (such as potassium chloride, potassium sulfate etc.) and viscous material (such as carbamide, MAP, general calcium, calcium
Magnesium-phosphorus fertilizer, triple superphosphate etc.) two kinds；In the NPK course of processing, grittiness powder material in rotary drum granulator at certain temperature and pH
Under the conditions of value waits, control amount of liquid phase (such as appropriate melting charge slurry, propylhomoserin reaction slurry, material moistened surface etc.) well, as far as possible
Various pelletize material is made to have optimal dissolubility, by liquid phase viscous material recrystallization by grittiness powder material bonding constantly group
Poly-granulating of growing up；Meanwhile, by the continuous rolling of rotary drum granulator, produce collision between particle and friction make particle rounding, it is thus achieved that
Smooth surface, mellow and full particle；The NPK product of high-quality is obtained again by be dried, sieve, cool down, surface process etc..But use
During the potassium sulfate compound fertilizer that granulating method produces, present potassium (K2O) content rising, grittiness material account for the ratio of total material and increase
Add, and carry out being humidified in granulation process, when heating, the dissolubility of potassium sulfate is low, and during pelletize, bad adhesion makes particle tight
Close difference, particle intensity is low, is storing and easily efflorescence or caking in transportation, therefore become chemical fertilizer production enterprise in the urgent need to
The problem solved.
For improving compound fertilizer granules intensity, most domestic producer adds anti-powdering agent (bonding agent) when pelletize, or
Change compound fertilizer production with tower granulation into.As patent CN 104058902 A discloses one " anti-powdering agent of compound fertilizer and application thereof ",
Add water soluble polymer resin during compound fertilizer granulating and there is the inorganic salt of water absorption effect, there is the anti-efflorescence of raising compound fertilizer
Ability, enhancing fertiliser granulates intensity, but the cost of material of compound fertilizer can be increased.
Summary of the invention
For solving above technical problem, it is an object of the invention to provide a kind of raising potassium sulfate compound fertilizer granule strength
Additive and the preparation method of high-strength complex Hefei granule, described additive applies in compound fertilizer granulating, can effectively strengthen
The intensity of compound fertilizer granules, is substantially reduced the probability of efflorescence and caking.
The object of the invention is realized in: a kind of additive improving potassium sulfate compound fertilizer granule strength, and it is crucial
It is to be made up of following raw material: phosphoric acid,diluted, potassium sulfate solid, sulphuric acid.
Preferably, the concentration of above-mentioned phosphoric acid,diluted is 20-32%P2O5, the mass concentration of described sulphuric acid is 98%.
Preferably, the weight ratio of above-mentioned phosphoric acid,diluted, potassium sulfate solid and sulphuric acid is 1:(1～3): (1.4～2).
Preferably, above-mentioned additive is made by the following method: phosphoric acid,diluted and potassium sulfate solid are stirred mixing in proportion
After, then be sent in the lump in tubular reactor react with sulphuric acid and steam, the potassium acid sulfate of generation, potassium sulfate and phosphoric acid melting material
Slurry, is additive, reclaims a large amount of high-temperature high-pressure overheat steams of generation simultaneously.
A kind of preparation method of high-strength complex Hefei granule, it it is critical only that and comprise the steps of:
(1) after phosphoric acid,diluted and potassium sulfate solid being stirred mixing, then tubular reactor it is sent in the lump with sulphuric acid and steam
Interior reaction, generates potassium acid sulfate, potassium sulfate and phosphoric acid melting slip, and reclaims a large amount of high-temperature high-pressure overheat steams of generation；
(3) described potassium acid sulfate, potassium sulfate and phosphoric acid melting slip are delivered to comminutor mouth be atomized, and through ammonia ammonia
Change, carry out fertilizer spraying pelletize simultaneously；
(4) the compound fertilizer's material after spraying pelletize proceeds bonded pelleting in comminutor；
(5) compound fertilizer's fertilizer drying after bonded pelleting, sieve, cool down and pack after obtain complex fertilizer product.
Preferably, in above-mentioned steps (1), the concentration of phosphoric acid,diluted is 20-32%P2O5, the mass concentration of described sulphuric acid is
98%.
Preferably, in above-mentioned steps (1), the weight ratio of phosphoric acid,diluted, potassium sulfate solid and sulphuric acid is 1:(1～3): (1.4～
2)。
Principle: with a certain amount of water, potassium sulfate will be starched the slurry that formation can carry again, with the concentrated sulphuric acid added
Mixing, concentrated sulphuric acid through dilution and with potassium sulfate generation chemical reaction, such as reaction equation 1., produce the temperature potassium sulfate more than 140 DEG C
With potassium acid sulfate mixing high temperature slip, then with the ammonia (NH that fills in comminutor3) react generation potassium sulfate and ammonium sulfate, such as reaction
2. formula, not only increases the amount of liquid phase of bed in comminutor, and after high temperature mixed slurry flash distillation, forms potassium sulfate and ammonium sulfate knot
Crystalline substance, bonding material granulating around thus increase particle intensity.Result of the test shows: use the present invention to improve traditional compound fertilizer raw
The potassium sulfate compound fertilizer constant product quality that production. art produces, average grain intensity brings up to 35～50 newton, and ratio is traditional
The potassium sulfate compound fertilizer average grain intensity that compound fertilizer production technology produces improves 15～30 newton.
K2SO4+H2SO4→2KHSO4...................................①
2KHSO4+NH3→K2SO4+(NH4)2SO4........................②
Beneficial effect:
A kind of additive improving potassium sulfate compound fertilizer granule strength of the present invention and the preparation of high-strength complex Hefei granule
Method, divides and utilizes potassium acid sulfate dissolubility for nearly 4.5 times of potassium sulfate dissolubility, and potassium sulfate dissolubility is 110g/L (20 DEG C), sulfur
Potassium hydrogen phthalate is dissolubility 490g/L (20 DEG C), and potassium sulfate is converted into the potassium acid sulfate that dissolubility is bigger, viscous in increasing comminutor
Property material amount (liquid phase), thus be effectively improved the intensity of potassium sulfate compound fertilizer, reduce compound fertilizer's processing, store and transported
Secondary efflorescence in journey and the probability of caking.
Detailed description of the invention
Below in conjunction with embodiment and Fig. 1, the invention will be further described.
Embodiment 1:
A kind of additive improving potassium sulfate compound fertilizer granule strength, its raw material by 200 parts of sulphuric acid, 100 parts of concentration is
25%P2O5Phosphoric acid,diluted, 300 parts of mass concentrations be 98% potassium sulfate solid composition.
The preparation method of a kind of high-strength complex Hefei granule, comprises the steps of:
1, take in 100 parts of phosphoric acid,diluteds and 300 parts of potassium sulfate solid material stock tanks, stir into the compound of potassium sulfate and phosphoric acid,diluted
Slurry；
2, react in mixed slurry obtained above and 200 parts of sulphuric acid, steam being sent to tubular reactor, produce
Raw substantial amounts of high-temperature high-pressure overheat steam, generates potassium acid sulfate, potassium sulfate and phosphoric acid melting slip；
3,1531 parts of powder ammonium phosphates, 1769 parts of carbamide, 555 parts of ammonium sulfate, 230 parts of clays and 2931 parts of potassium sulfate are sent into
After granulator granulation obtains fertiliser granulates, above-mentioned potassium acid sulfate, potassium sulfate and phosphoric acid melting slip are atomized simultaneously, and warp
Ammonia ammonification, carries out fertiliser granulates spraying pelletize；
4, the compound fertilizer's material after atomizing spraying pelletize proceeds bonded pelleting in comminutor；
5, from comminutor discharge compound fertilizer's fertilizer drying, sieve, cool down and pack after obtain complex fertilizer product.
Implementation result: show by this Case Experiments On A result: use the present invention produce 16-9-21 potassium sulfate compound fertilizer with
16-9-21 potassium sulfate compound fertilizer granule without additive is compared, and the present embodiment particle is more smooth, mellow and full, and particle is strong
Degree is bigger, and average particle strength 35N exceeds 20N than intensity 15N of the potassium sulfate compound fertilizer granule without additive.
Embodiment 2:
A kind of additive improving potassium sulfate compound fertilizer granule strength, its raw material by 160 parts of sulphuric acid, 100 parts of concentration is
20.78%P2O5Phosphoric acid,diluted, 300 parts of mass concentrations be 98% potassium sulfate solid composition.
The preparation method of a kind of high-strength complex Hefei granule, comprises the steps of:
1, take in 100 parts of phosphoric acid,diluteds and 300 parts of potassium sulfate solid material stock tanks, stir into the compound of potassium sulfate and phosphoric acid,diluted
Slurry；
2, react in mixed slurry obtained above and 160 parts of sulphuric acid, steam being sent to tubular reactor, produce
Raw substantial amounts of high-temperature high-pressure overheat steam, generates potassium acid sulfate, potassium sulfate and phosphoric acid melting slip；
3,2106 parts of powder ammonium phosphates, 813 parts of carbamide, 906 parts of ammonium sulfate, 250 parts of clays and 1544 parts of potassium sulfate are sent into
After granulator granulation obtains fertiliser granulates, above-mentioned potassium acid sulfate, potassium sulfate and phosphoric acid melting slip are atomized simultaneously, and warp
Ammonia ammonification, carries out fertiliser granulates spraying pelletize；
4, the compound fertilizer's material after atomizing spraying pelletize proceeds bonded pelleting in comminutor；
5, from comminutor discharge compound fertilizer's fertilizer drying, sieve, cool down and pack after obtain complex fertilizer product.
Implementation result: show by this Case Experiments On A result: use the 15-15-15 potassium sulfate compound fertilizer that the present invention produces
With compared with the 15-15-15 potassium sulfate compound fertilizer granule of additive, the present embodiment particle is more smooth, mellow and full, particle
Intensity is bigger, and average particle strength 50N exceeds 30N than intensity 20N of the potassium sulfate compound fertilizer granule without additive.
Embodiment 3:
A kind of additive improving potassium sulfate compound fertilizer granule strength, its raw material by 140 parts of sulphuric acid, 100 parts of concentration is
20%P2O5Phosphoric acid,diluted, 100 parts of mass concentrations be 98% potassium sulfate solid composition.
The preparation method of a kind of high-strength complex Hefei granule, comprises the steps of:
1, take in 100 parts of phosphoric acid,diluteds and 100 parts of potassium sulfate solid material stock tanks, stir into the compound of potassium sulfate and phosphoric acid,diluted
Slurry；
2, react in mixed slurry obtained above and 140 parts of sulphuric acid, steam being sent to tubular reactor, produce
Raw substantial amounts of high-temperature high-pressure overheat steam, generates potassium acid sulfate, potassium sulfate and phosphoric acid melting slip；
3,2106 parts of powder ammonium phosphates, 813 parts of carbamide, 932 parts of ammonium sulfate, 250 parts of clays and 1744 parts of potassium sulfate are sent into
After granulator granulation obtains fertiliser granulates, above-mentioned potassium acid sulfate, potassium sulfate and phosphoric acid melting slip are atomized simultaneously, and warp
Ammonia ammonification, carries out fertiliser granulates spraying pelletize；
4, the compound fertilizer's material after atomizing spraying pelletize proceeds bonded pelleting in comminutor；
5, from comminutor discharge compound fertilizer's fertilizer drying, sieve, cool down and pack after obtain complex fertilizer product.
Implementation result: show by this Case Experiments On A result: use the 15-15-15 potassium sulfate compound fertilizer that the present invention produces
With compared with the 15-15-15 potassium sulfate compound fertilizer granule of additive, the present embodiment particle is more smooth, mellow and full, particle
Intensity is bigger, and average particle strength 45N exceeds 25N than intensity 20N of the potassium sulfate compound fertilizer granule without additive.
Embodiment 4:
A kind of additive improving potassium sulfate compound fertilizer granule strength, its raw material by 170 parts of sulphuric acid, 100 parts of concentration is
32%P2O5Phosphoric acid,diluted, 200 parts of mass concentrations be 98% potassium sulfate solid composition.
The preparation method of a kind of high-strength complex Hefei granule, comprises the steps of:
1, take in 100 parts of phosphoric acid,diluteds and 100 parts of potassium sulfate solid material stock tanks, stir into the compound of potassium sulfate and phosphoric acid,diluted
Slurry；
2, react in mixed slurry obtained above and 170 parts of sulphuric acid, steam being sent to tubular reactor, produce
Raw substantial amounts of high-temperature high-pressure overheat steam, generates potassium acid sulfate, potassium sulfate and phosphoric acid melting slip；
3,2106 parts of powder ammonium phosphates, 813 parts of carbamide, 932 parts of ammonium sulfate, 250 parts of clays and 1744 parts of potassium sulfate are sent into
After granulator granulation obtains fertiliser granulates, above-mentioned potassium acid sulfate, potassium sulfate and phosphoric acid melting slip are atomized simultaneously, and warp
Ammonia ammonification, carries out fertiliser granulates spraying pelletize；
4, the compound fertilizer's material after atomizing spraying pelletize proceeds bonded pelleting in comminutor；
5, from comminutor discharge compound fertilizer's fertilizer drying, sieve, cool down and pack after obtain complex fertilizer product.
Implementation result: show by this Case Experiments On A result: use the 15-15-15 potassium sulfate compound fertilizer that the present invention produces
With compared with the 15-15-15 potassium sulfate compound fertilizer granule of additive, the present embodiment particle is more smooth, mellow and full, particle
Intensity is bigger, and average particle strength 50N exceeds 30N than intensity 20N of the potassium sulfate compound fertilizer granule without additive.
It is last it should be noted that foregoing description is only the preferred embodiments of the present invention, the ordinary skill people of this area
Member, under the enlightenment of the present invention, on the premise of present inventive concept and claim, can make table as multiple types
Show, within such conversion each falls within protection scope of the present invention.
Claims (7)
1. the additive improving potassium sulfate compound fertilizer granule strength, it is characterised in that be made up of following raw material: phosphoric acid,diluted,
Potassium sulfate solid, sulphuric acid.
2. according to a kind of additive improving potassium sulfate compound fertilizer granule strength described in claims 1, it is characterised in that:
The concentration of described phosphoric acid,diluted is 20-32%P2O5, the mass concentration of described sulphuric acid is 98%.
3. according to a kind of additive improving potassium sulfate compound fertilizer granule strength described in claims 2, it is characterised in that:
The weight ratio of described phosphoric acid,diluted, potassium sulfate solid and sulphuric acid is 1:(1～3): (1.4～2).
4. according to a kind of additive improving potassium sulfate compound fertilizer granule strength described in claims 3, it is characterised in that
Make by the following method: after phosphoric acid,diluted and potassium sulfate solid are stirred mixing in proportion, then send in the lump with sulphuric acid and steam
React in tubular reactor, the potassium acid sulfate of generation, potassium sulfate and phosphoric acid melting slip, be additive, reclaim product simultaneously
Raw a large amount of high-temperature high-pressure overheat steams.
5. the preparation method of a high-strength complex Hefei granule, it is characterised in that comprise the steps of:
(1) after phosphoric acid,diluted and potassium sulfate solid being stirred mixing more anti-in being sent to tubular reactor in the lump with sulphuric acid and steam
Should, generate potassium acid sulfate, potassium sulfate and phosphoric acid melting slip, and reclaim a large amount of high-temperature high-pressure overheat steams of generation；
(3) described potassium acid sulfate, potassium sulfate and phosphoric acid melting slip are delivered to comminutor mouth be atomized, and through ammonia ammonification,
Carry out fertilizer spraying pelletize simultaneously；
(4) the compound fertilizer's material after spraying pelletize proceeds bonded pelleting in comminutor；
(5) compound fertilizer's fertilizer drying after bonded pelleting, sieve, cool down and pack after obtain complex fertilizer product.
6. according to the preparation method of a kind of high-strength complex Hefei granule described in claims 5, it is characterised in that: described step
(1) in, the concentration of phosphoric acid,diluted is 20-32%P2O5, the mass concentration of described sulphuric acid is 98%.
7. according to the preparation method of a kind of high-strength complex Hefei granule described in claims 6, it is characterised in that: described step
(1) in, the weight ratio of phosphoric acid,diluted, potassium sulfate solid and sulphuric acid is 1:(1～3): (1.4～2).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109956763A (en) * | 2017-12-25 | 2019-07-02 | 中蓝连海设计研究院有限公司 | A kind of method and potassium sulfate prilling process improving granular potassium sulfate intensity |
| CN109956823A (en) * | 2019-04-25 | 2019-07-02 | 郑州大学 | A kind of production method of potassium sulfate fertilizers particle |
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| CN1266833A (en) * | 1999-08-13 | 2000-09-20 | 南化集团设计院 | Process for preparing potassium sulfate type compound fertilizer by drum ammonification |
| CN1280111A (en) * | 1999-07-13 | 2001-01-17 | 李守义 | Middle concentrate compound potassium sulfate fertilizer and its producing method |
| CN101318855A (en) * | 2007-06-07 | 2008-12-10 | 湖北洋丰股份有限公司 | High-efficiency high-concentration sulphur based complex fertilizer |
| CN101367682A (en) * | 2008-09-28 | 2009-02-18 | 中国-阿拉伯化肥有限公司 | Method for preparing complex fertilizer with mutual solution slip tubular reactor |
| CN101734973A (en) * | 2009-12-25 | 2010-06-16 | 聊城鲁西化工第四化肥厂 | Method for making particle compound fertilizer from potassium fluoaluminate |
| CN101817706A (en) * | 2009-12-18 | 2010-09-01 | 聊城鲁西化工第五化肥厂 | Production method for potassium sulfate compound fertilizer |
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| CN85104005A (en) * | 1984-02-28 | 1986-11-19 | 窒素股份有限公司 | The dry process of the vitriolate of tartar that generated by Repone K and sulfuric acid is used to neutralize |
| CN1280111A (en) * | 1999-07-13 | 2001-01-17 | 李守义 | Middle concentrate compound potassium sulfate fertilizer and its producing method |
| CN1266833A (en) * | 1999-08-13 | 2000-09-20 | 南化集团设计院 | Process for preparing potassium sulfate type compound fertilizer by drum ammonification |
| CN101318855A (en) * | 2007-06-07 | 2008-12-10 | 湖北洋丰股份有限公司 | High-efficiency high-concentration sulphur based complex fertilizer |
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| CN101817706A (en) * | 2009-12-18 | 2010-09-01 | 聊城鲁西化工第五化肥厂 | Production method for potassium sulfate compound fertilizer |
| CN101734973A (en) * | 2009-12-25 | 2010-06-16 | 聊城鲁西化工第四化肥厂 | Method for making particle compound fertilizer from potassium fluoaluminate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109956763A (en) * | 2017-12-25 | 2019-07-02 | 中蓝连海设计研究院有限公司 | A kind of method and potassium sulfate prilling process improving granular potassium sulfate intensity |
| CN109956823A (en) * | 2019-04-25 | 2019-07-02 | 郑州大学 | A kind of production method of potassium sulfate fertilizers particle |
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| CN106220278B (en) | 2019-10-25 |
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Effective date of registration: 20190107 Address after: 650000 Jinsuo Township Industrial Park, Xundian County, Kunming City, Yunnan Province Applicant after: Zhong Hua Yunlong company limited Address before: 618000 4th Floor, E10 Headquarters Economic Port, 888 Chenglong Avenue, Longquanyi, Chengdu, Sichuan Province Applicant before: Chengdu research and development centre of Zhong Hua chemical fertilizer company limited |
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