CN102464509A - Preparation method of high-concentration round granular potash fertilizer - Google Patents
Preparation method of high-concentration round granular potash fertilizer Download PDFInfo
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- CN102464509A CN102464509A CN2010105372695A CN201010537269A CN102464509A CN 102464509 A CN102464509 A CN 102464509A CN 2010105372695 A CN2010105372695 A CN 2010105372695A CN 201010537269 A CN201010537269 A CN 201010537269A CN 102464509 A CN102464509 A CN 102464509A
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Abstract
The invention discloses a preparation method of a high-concentration round granular potash fertilizer. The method comprises: adding powdered ammonium bicarbonate or ammonia water (or other alkaline substances) into a commercially available powdered potash fertilizer raw material (54-62%) in proportion, mixing them uniformly in a horizontal mixer, then conveying the mixture into a disc granulator or a rotary drum granulator, injecting an aluminum sulfate solution (or ferrum, zinc and other salt solutions) of a certain concentration in proportion to serve as a granulating liquid phase, and conducting rolling granulation, then carrying out drying and screening so as to obtain a round granular potash fertilizer product, the potassium oxide content of which can be up to over 60%. The preparation method of the invention has the characteristics of simple operation process, low cost, great production capacity, mellow product granules, and high strength, etc. Also, with no generation of ''three wastes'' during production, the method in the invention is energy saving and environment-friendly, thus boasting very broad market prospects.
Description
One: technical field
The present invention relates to a kind of method of manufacture of granular potash fertilizer, particularly disclose the method for manufacture that a kind of potassium oxide content can reach the high density pellet potash fertilizer more than 60%.
Two: background technology
, mechanized application technological continuous development fertile along with BB, increasing to the demand of high concentration particle potash fertilizer products, the domestic market demand amount is between ten thousand tons of the 80-100 at present; Most dependence on import, and mostly be the irregular blocky-shaped particle that extruder grain is produced, particle has corner angle; Be unfavorable for mechanized application, also be unfavorable for doing the fertile raw material of BB, this type of potash fertilizer is done the fertile raw material of BB; Be prone to produce the segregation layering, cause the irregular result of use that influences of nutrient, mechanized application easy blocking machinery.And the extruder grain process characteristic is that power consumption is big, and production capacity is restricted.The pellet potash fertilizer that existing pellet granulation is produced; Mostly be directly in raw material, to add a large amount of high price stickers, both increased cost, the product nutrient content obviously reduces (near 10%) again; Be not suitable for the market requirement, also because the restriction of its processing condition has obviously influenced production capacity and do not formed scale.At present, the face shaping of granular potash fertilizer has become important restraining factors of fertile production of BB and mechanized application technology popularization.
Three: summary of the invention
For solving the technical problem of above-mentioned granular potash fertilizer; The present invention provides a kind of method of manufacture of high density pellet potash fertilizer, and potassium oxide content of the present invention can reach more than 60%, and production cost is low, operating procedure is simple; Can directly utilize the fertile existing installation of ripe fertile compound to carry out scale prodn; Need not to carry out scrap build and can reach at full capacity output, improved the production capacity of regular round shaped grain granular potash fertilizer, solved the drawback that extruder grain technology granular potash fertilizer is inappropriate for mechanized application.
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
A kind of method of manufacture of high density pellet potash fertilizer may further comprise the steps: salt and alkaline substance reaction generate colloidal cpd, colloidal cpd and potash fertilizer raw materials mix, bonded pelleting; Make granular potash fertilizer with granulated through oven dry, screening, cooling.
The method of manufacture of above-mentioned high density pellet potash fertilizer, said alkaline substance is bicarbonate of ammonia/ammoniacal liquor, salt is the material that aluminium, iron or zinc salt or other can generate colloidal cpd with the basic cpd reaction.
The method of manufacture of above-mentioned high density pellet potash fertilizer, with the water-soluble formation solution of salt/alkali, the potash fertilizer raw material mixes with alkali/salt; The solution that makes is evenly sprayed in the mixture of potash fertilizer raw material and alkali/salt round as a ball granulation while spraying; Make granular potash fertilizer with granulated through oven dry, screening, cooling.
The method of manufacture of above-mentioned high density pellet potash fertilizer with salt, alkali and potash fertilizer raw materials mix, is sprayed water in mixture, the round as a ball granulation while spraying; Granulation product is made pellet potash fertilizer through oven dry, screening, cooling.
The method of manufacture of above-mentioned high density pellet potash fertilizer, with salt and the water-soluble formation solution of alkali difference, the potash fertilizer raw material places in the spheronizator, and the solution that makes is evenly sprayed in the potash fertilizer raw material the round as a ball granulation while spraying simultaneously; Make granular potash fertilizer with granulated through oven dry, screening, cooling.
Above-mentioned preparation method, the quality of described bicarbonate of ammonia/ammoniacal liquor are the 3-6% of potash fertilizer raw materials quality; The salt compounds quality is the 1.6-2.4% of potash fertilizer raw material.
Above-mentioned preparation method, the water-soluble formation solution of said salt compounds, strength of solution is 20%, the salt compounds solution with 20% sprays in the mixture of potash fertilizer and bicarbonate of ammonia/ammoniacal liquor, the round as a ball granulation while spraying.
The method of manufacture of above-mentioned high density pellet potash fertilizer, the granularity of said powdery potash fertilizer raw material is greater than 60 orders.
The method of manufacture of above-mentioned high density pellet potash fertilizer, the drying temperature after the said potash fertilizer granulation is 150～200 ℃, drying time 20-40 minute.。
Principle of work of the present invention is: utilize aluminium salt and alkali reaction to generate cementing matter, as long as both reactions can form cementing matter, such as utilizing industrial aluminum sulphate and bicarbonate of ammonia/ammoniacal liquor reaction, form cementing matter, bonding round as a ball granulation.
Beneficial effect of the present invention shows:
1, compare with traditional prilling process, the initiative specific chemical reaction that utilizes of the present invention forms newborn adhesive bond, have active big, cementing power is strong, additive is few, low cost and other advantages.
2, present method is produced potash fertilizer minimum is reduced in the influence of potash fertilizer content, realizes high density, HS, the mellow and full pellet potash fertilizer production of outward appearance.
3, the potash fertilizer raw material adopt Powdered and granularity greater than 60 orders, the round shaped grain potash fertilizer bonding of under this fineness, producing is finer and close, granule strength is higher.
4, adopt bicarbonate of ammonia and aluminium reactant salt to form the cementing matter granulation, transform through reaction and hyperthermia drying, residual dry-matter is (1～2%) seldom, and is less to the potash fertilizer content influence, guaranteed the high density of granular potash fertilizer.
5, baking step: 150～200 ℃ of bake out temperatures, drying time is 20～40 minutes, adopts big air quantity; Oven dry potassium fertilizer particle to moisture is less than 1%; And make the cementing matter pyrolytic conversion, and be converted into aluminum oxide by white lake, further improved cementing power and granule strength.
6, potassium oxide content is high in the potash fertilizer of present method generation, can reach more than 60%, but to raw-material less demanding, commercially available 54～62% powder potash fertilizer all can use, and it is obvious to compare existing product advantage.
7, this potassium fertilizer particle is even, mellow and full, intensity is high, prevented from caking, is convenient to user's use and has guaranteed the implementation result of potash fertilizer.
8, to have a production cost low in the present invention, and operating procedure is simple, and the finished product rate is high, and throughput is big, is fit to the fertile scope of the enterprise production of compound.
No matter this shows, still be that production capacity significantly is superior to the granular potash fertilizer that extrusion process is produced from outward appearance, the scope of application, has great application value.
Four: embodiment:
Describe the present invention below in conjunction with specific embodiment:
Embodiment one
A kind of method of manufacture of high density pellet potash fertilizer may further comprise the steps:
A, batching: commercially available 62% powdery potash fertilizer (granularity 200 orders) raw material and powdery bicarbonate of ammonia are mixed and made into the granulation material according to ratio of quality and the number of copies at 100: 6; Aluminium salt adopts Tai-Ace S 150, and Tai-Ace S 150 and aforementioned granulation quality of material portion rate are 1.6: 100, Tai-Ace S 150 is mixed with concentration 20% solution processes subsequent use.
B, granulation: a step is processed granulation be added into granulating disc or rotary drum granulator, evenly spray alum liquor at the material rolling process and carry out granulation with material.
C, oven dry: granulation is turned oven dry 40 minutes through the fertile drying plant of compound under 150 ℃;
Screening makes the pellet potash fertilizer products behind d, the naturally cooling.
Potassium content can reach 61% after 62% powdery potash fertilizer utilized this method of manufacture to accomplish.
Embodiment two
A, batching: commercially available 54% powdery potash fertilizer (granularity 180 orders) raw material and powdery bicarbonate of ammonia are mixed and made into granulation according to ratio of quality and the number of copies at 100: 3 use material; Aluminium salt adopts Tai-Ace S 150, and Tai-Ace S 150 and aforementioned granulation quality of material portion rate are 2.4: 100, Tai-Ace S 150 is mixed with concentration 20% solution processes subsequent use.
B, granulation: a step is processed granulation be added into granulating disc or rotary drum granulator, evenly spray alum liquor at the material rolling process and carry out granulation with material.
C, oven dry: granulation is turned oven dry 20 minutes through the fertile drying plant of compound under 200 ℃;
Screening makes the pellet potash fertilizer products behind d, the naturally cooling.
Potassium content can reach 53% after 54% powdery potash fertilizer utilized this method of manufacture to accomplish.
Embodiment three
A, batching: commercially available 57% powdery potash fertilizer (granularity 120 orders) raw material and powdery bicarbonate of ammonia are mixed and made into granulation according to ratio of quality and the number of copies at 100: 5 use material; Aluminium salt adopts Tai-Ace S 150, and Tai-Ace S 150 and aforementioned granulation quality of material portion rate are 1.7: 100, Tai-Ace S 150 is mixed with concentration 20% solution processes subsequent use.
B, granulation: a step is processed granulation be added into granulating disc or rotary drum granulator, evenly spray alum liquor at the material rolling process and carry out granulation with material.
C, oven dry: granulation is turned oven dry 30 minutes through the fertile drying plant of compound under 180 ℃;
Screening makes the pellet potash fertilizer products behind d, the naturally cooling.
Potassium content can reach 56% after 57% powdery potash fertilizer utilized this method of manufacture to accomplish.
Embodiment four
A, batching: commercially available 60% powdery potash fertilizer (granularity 100 orders) raw material and powdery bicarbonate of ammonia are mixed and made into granulation according to ratio of quality and the number of copies at 100: 4 use material; Aluminium salt adopts Tai-Ace S 150, and Tai-Ace S 150 is 2: 100 with aforementioned granulation quality of material ratio, Tai-Ace S 150 is mixed with concentration 20% solution processes subsequent use.
B, granulation: a step is processed granulation be added into granulating disc or rotary drum granulator, evenly spray alum liquor at the material rolling process and carry out granulation with material.
C, oven dry: granulation is turned oven dry 25 minutes through the fertile drying plant of compound under 160 ℃;
Screening makes the pellet potash fertilizer products behind d, the naturally cooling.
Potassium content can reach 59% after 60% powdery potash fertilizer utilized this method of manufacture to accomplish.
Embodiment five
A, batching: commercially available 59% powdery potash fertilizer (granularity 80 orders) raw material and powdery bicarbonate of ammonia are mixed and made into granulation according to ratio of quality and the number of copies at 100: 5.5 use material; Aluminium salt adopts Tai-Ace S 150, and Tai-Ace S 150 is 2.2: 100 with aforementioned granulation quality of material ratio, Tai-Ace S 150 is mixed with concentration 20% solution processes subsequent use.
B, granulation: a step is processed granulation be added into granulating disc or rotary drum granulator, evenly spray alum liquor at the material rolling process and carry out granulation with material.
C, oven dry: granulation is turned oven dry 30 minutes through the fertile drying plant of compound under 180 ℃;
Screening makes the pellet potash fertilizer products behind d, the naturally cooling.
Potassium content can reach 58% after 59% powdery potash fertilizer utilized this method of manufacture to accomplish.
Embodiment six
A, batching: aluminium salt adopts powdery Tai-Ace S 150; With commercially available powdery potash fertilizer (granularity is greater than 60 orders) raw material and powdery bicarbonate of ammonia, powdery Tai-Ace S 150 according to the ratio of quality and the number of copies uniform mixing, the ratio of quality and the number of copies 100: 3: 1.6 of potash fertilizer raw material, bicarbonate of ammonia and powdery Tai-Ace S 150 wherein.
B, granulation: a step is processed granulation be added into granulating disc or rotary drum granulator, evenly spray water at the material rolling process with mixture.
C, oven dry: granulation is turned oven dry 20 minutes through the fertile drying plant of compound under 150 ℃;
Screening makes the pellet potash fertilizer products behind d, the naturally cooling.
Embodiment seven
A, batching: aluminium salt adopts powdery Tai-Ace S 150; With commercially available powdery potash fertilizer (granularity 120 orders) raw material and powdery bicarbonate of ammonia, powdery Tai-Ace S 150 according to the ratio of quality and the number of copies uniform mixing, the ratio of quality and the number of copies 100: 6: 2.4 of potash fertilizer raw material, bicarbonate of ammonia and powdery Tai-Ace S 150 wherein.
B, granulation: a step is processed granulation be added into granulating disc or rotary drum granulator, evenly spray water at the material rolling process with mixture.
C, oven dry: granulation is turned oven dry 40 minutes through the fertile drying plant of compound under 200 ℃;
Screening makes the pellet potash fertilizer products behind d, the naturally cooling.
Embodiment eight
A, batching: commercially available 54～62% powdery potash fertilizer (granularity 60～200 orders) raw material, Tai-Ace S 150 and ammoniacal liquor (18%) according to 100: 2: 4 ratios of ratio of quality and the number of copies, are mixed with concentration 20% solution with Tai-Ace S 150 and process subsequent use.
B, granulation: use the potash fertilizer material is added into granulating disc or rotary drum granulator, in the material rolling process, a step is processed alum liquor and ammoniacal liquor evenly be sprayed on the material simultaneously, carry out round as a ball granulation.
C, oven dry: granulation is turned oven dry 25 minutes through the fertile drying plant of compound under 160 ℃;
Screening makes the pellet potash fertilizer products behind d, the naturally cooling.
Embodiment nine
A, batching: aluminium salt adopts powdery Tai-Ace S 150, powdery potash fertilizer raw material and powdery Tai-Ace S 150 is mixed and made into granulation uses material; Alkali adopts commercially available 18% ammoniacal liquor, and wherein potash fertilizer raw material and ammoniacal liquor ratio of quality and the number of copies are 100: 3; Tai-Ace S 150 is 1.6: 100 with potash fertilizer raw materials quality ratio.
B, granulation: a step is processed granulation be added into granulating disc or rotary drum granulator, evenly spray ammonia soln at the material rolling process and carry out granulation with material.
C, oven dry: granulation is turned oven dry 20 minutes through the fertile drying plant of compound under 150 ℃;
Screening makes the pellet potash fertilizer products behind d, the naturally cooling.
Embodiment ten
A, batching: aluminium salt adopts powdery Tai-Ace S 150, powdery potash fertilizer raw material and powdery Tai-Ace S 150 is mixed and made into granulation uses material; Alkali adopts commercially available 18% ammoniacal liquor, and wherein potash fertilizer raw material and ammoniacal liquor ratio of quality and the number of copies are 100: 6; The mass ratio of Tai-Ace S 150 and potash fertilizer raw material is 2.4: 100.
B, granulation: a step is processed granulation be added into granulating disc or rotary drum granulator, evenly spray ammonia soln at the material rolling process and carry out granulation with material.
C, oven dry: granulation is turned oven dry 40 minutes through the fertile drying plant of compound under 200 ℃;
Screening makes the pellet potash fertilizer products behind d, the naturally cooling.
Embodiment 11
A, batching: salt adopts molysite (ferric sulfate etc.), and alkali adopts commercially available 18% ammoniacal liquor, and raw material is Powdered potash fertilizer raw material, and wherein potash fertilizer raw material and ammoniacal liquor ratio of quality and the number of copies are 100: 6; The mass ratio of ferric sulfate and potash fertilizer raw material is 2.4: 100, ferric sulfate is processed concentration 20% solution process subsequent use.
B, granulation: the potash fertilizer raw material is added into granulating disc or rotary drum granulator, the material rolling process simultaneously different spray nozzles evenly spray ammonia soln and ferrum sulfuricum oxydatum solutum carries out granulation.
C, oven dry: granulation is turned oven dry 40 minutes through the fertile drying plant of compound under 150 ℃;
Screening makes the pellet potash fertilizer products behind d, the naturally cooling.
Embodiment 12
A, batching: salt adopts zinc salt (zinc sulfate etc.), and alkali adopts commercially available 18% ammoniacal liquor, and raw material is Powdered potash fertilizer raw material, and wherein potash fertilizer raw material and ammoniacal liquor ratio of quality and the number of copies are 100: 3; The mass ratio of zinc sulfate and potash fertilizer raw material is 1.6: 100, zinc sulfate is processed concentration 20% solution process subsequent use.
B, granulation: the potash fertilizer raw material is added into granulating disc or rotary drum granulator, the material rolling process simultaneously different spray nozzles evenly spray ammonia soln and solution of zinc sulfate carries out granulation.
C, oven dry: granulation is turned oven dry 20 minutes through the fertile drying plant of compound under 200 ℃;
Screening makes the pellet potash fertilizer products behind d, the naturally cooling.
Embodiments of the invention not only are confined to above embodiment, and saline and alkaline kind not only is confined within this embodiment, and salt comprises aluminium salt, molysite, zinc salt etc.; Alkali comprises ammoniacal liquor, sodium hydroxide (potassium), yellow soda ash (potassium), sodium hydrogencarbonate alkaline matters such as (potassium), as long as both reactions can form colloidal cpd.
Claims (9)
1. the method for manufacture of a high density pellet potash fertilizer is characterized in that: may further comprise the steps:
Salt and alkaline substance reaction generate colloidal cpd, colloidal cpd and potash fertilizer raw materials mix, bonded pelleting;
Make granular potash fertilizer with granulated through oven dry, screening, cooling.
2. the method for manufacture of high density pellet potash fertilizer according to claim 1 is characterized in that: alkaline substance is bicarbonate of ammonia or ammoniacal liquor, and salt is the material that aluminium, iron or zinc salt or other can generate colloidal cpd with the basic cpd reaction.
3. the method for manufacture of high density pellet potash fertilizer according to claim 1 and 2 is characterized in that: with the water-soluble formation solution of salt/alkali, the potash fertilizer raw material mixes with alkali/salt; The solution that makes is evenly sprayed in the mixture of potash fertilizer raw material and alkali/salt round as a ball granulation while spraying;
Make granular potash fertilizer with granulated through oven dry, screening, cooling.
4. the method for manufacture of high density pellet potash fertilizer according to claim 1 and 2 is characterized in that:
With salt, alkali and potash fertilizer raw materials mix, in mixture, spray water round as a ball granulation while spraying;
Granulation product is made pellet potash fertilizer through oven dry, screening, cooling.
5. the method for manufacture of high density pellet potash fertilizer according to claim 2 is characterized in that:
With salt and the water-soluble formation solution of alkali difference, the potash fertilizer raw material places in the spheronizator,
The solution that makes is evenly sprayed in the potash fertilizer raw material the round as a ball granulation while spraying simultaneously;
Make granular potash fertilizer with granulated through oven dry, screening, cooling.
6. preparation method according to claim 2 is characterized in that: the quality of described bicarbonate of ammonia/ammoniacal liquor is the 3-6% of potash fertilizer raw materials quality; The salt compounds quality is the 1.6-2.4% of potash fertilizer raw material.
7. preparation method according to claim 5 is characterized in that: the water-soluble formation solution of said salt compounds, and strength of solution is 20%, the salt compounds solution with 20% sprays in the mixture of potash fertilizer and bicarbonate of ammonia/ammoniacal liquor, the round as a ball granulation while spraying.
8. the method for manufacture of high density pellet potash fertilizer according to claim 1 is characterized in that: the granularity of said powdery potash fertilizer raw material is greater than 60 orders.
9. the method for manufacture of high density pellet potash fertilizer according to claim 1 is characterized in that: the drying temperature after the said potash fertilizer granulation is 150～200 ℃, drying time 20-40 minute.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103664356A (en) * | 2013-11-25 | 2014-03-26 | 滁州华冶机电科技有限公司 | Pellet potash fertilizer pelletizing technology |
| CN105294270A (en) * | 2015-11-11 | 2016-02-03 | 河北萌帮水溶肥料有限公司 | Potassium sulfate particle and preparation method thereof |
| WO2018032844A1 (en) * | 2016-08-15 | 2018-02-22 | 湖北富邦科技股份有限公司 | Method for preparing zinc-containing sustained-release pellet potash fertilizer |
| CN113105281A (en) * | 2021-04-23 | 2021-07-13 | 湖北富邦科技股份有限公司 | Method for producing round particle potash fertilizer |
| CN113149793A (en) * | 2021-04-23 | 2021-07-23 | 湖北富邦科技股份有限公司 | Neutral round particle potassium sulfate fertilizer and manufacturing method thereof |
| CN113213975A (en) * | 2021-04-23 | 2021-08-06 | 湖北富邦科技股份有限公司 | Round-particle potash fertilizer with instant dissolution characteristic and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103664356A (en) * | 2013-11-25 | 2014-03-26 | 滁州华冶机电科技有限公司 | Pellet potash fertilizer pelletizing technology |
| CN105294270A (en) * | 2015-11-11 | 2016-02-03 | 河北萌帮水溶肥料有限公司 | Potassium sulfate particle and preparation method thereof |
| CN105294270B (en) * | 2015-11-11 | 2018-10-09 | 河北萌帮水溶肥料有限公司 | A kind of granular potassium sulfate and preparation method thereof |
| WO2018032844A1 (en) * | 2016-08-15 | 2018-02-22 | 湖北富邦科技股份有限公司 | Method for preparing zinc-containing sustained-release pellet potash fertilizer |
| CN113105281A (en) * | 2021-04-23 | 2021-07-13 | 湖北富邦科技股份有限公司 | Method for producing round particle potash fertilizer |
| CN113149793A (en) * | 2021-04-23 | 2021-07-23 | 湖北富邦科技股份有限公司 | Neutral round particle potassium sulfate fertilizer and manufacturing method thereof |
| CN113213975A (en) * | 2021-04-23 | 2021-08-06 | 湖北富邦科技股份有限公司 | Round-particle potash fertilizer with instant dissolution characteristic and preparation method thereof |
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Application publication date: 20120523 |