CN1810728A - Natural granular magnesium sulfate fertilizer and its prepn process - Google Patents
Natural granular magnesium sulfate fertilizer and its prepn process Download PDFInfo
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- CN1810728A CN1810728A CN 200510119705 CN200510119705A CN1810728A CN 1810728 A CN1810728 A CN 1810728A CN 200510119705 CN200510119705 CN 200510119705 CN 200510119705 A CN200510119705 A CN 200510119705A CN 1810728 A CN1810728 A CN 1810728A
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Abstract
The present invention relates to compound agricultural fertilizer, and is especially natural granular magnesium sulfate fertilizer and its preparation process. By using water in the amount of 15-25 wt% of natural magnesium sulfate powder as adhesive, natural magnesium sulfate is treated through flash evaporation, pelletizigg, drying, packing and other steps to form spherical granular fertilizer product with water content not more than 5 wt%, hardness of 0.5-2.5 kg/sq cm and water soluble MgO content 22-29 wt%. The product of the present invention has high water soluble MgO content, high hardness, and smooth and homogeneous grains for easy mixing with other kind one fertilizer and mechanical application.
Description
Technical field
The present invention relates to the agricultural composite fertilizer field, relate to a kind of natural granular magnesium sulfate fertilizer and preparation method thereof.
Background technology
Fertiliser containing magnesium is as the important component part of agricultural composite fertilizer, though a lot of magniferous mineral or chemical can be used as the source of fertiliser containing magnesium in the composite fertilizer, during with magniferous mineral, because its water soluble magnesium content is low, can not meet the needs of certain specific composite fertilizer; Adopt magniferous pure compound, the cost height is uneconomical.Puritan filler magnesium is as the source of fertiliser containing magnesium in the composite fertilizer, can significantly improve water soluble magnesium content, be widely used in and be used for replenishing the required trace element of farm crop in the composite fertilizer, Gong Ying puritan filler magnesium powder in the market, it is when mixing with other fertilizer and using, because dust is big, causes environmental pollution and waste especially easily.At present water soluble magnesium content can reach more than 25%, can guarantee the puritan filler magnesium granulation product of certain degree of hardness simultaneously again, yet there are no to use and report.
Summary of the invention
The object of the present invention is to provide a kind of hardness height and the high natural granular magnesium sulfate fertilizer of water soluble magnesium content.
Another object of the present invention has provided the method for preparing this natural granular magnesium sulfate fertilizer, is suitable for industrialized mass.
The technical solution adopted for the present invention to solve the technical problems is: a kind of natural granular magnesium sulfate fertilizer is provided, be to make tackiness agent with the water that accounts for puritan filler magnesium opaque amount 15-25%, puritan filler magnesium is made through expansion drying, granulation, drying and packing, and is had following technical characterictic:
Outward appearance and granularity Φ 2-4mm spheroidal particle
Percent of pass 2-4mm aperture sieve percent of pass 〉=95%
Moisture mass content 0-5%
Hardness 0.5-2.5kg/cm
2
Water-soluble MgO mass content 22-29%
This natural granular magnesium sulfate fertilizer is to make tackiness agent with the water that accounts for puritan filler magnesium opaque amount 15-25%, and puritan filler magnesium is made by expansion drying, granulation, drying and packing; Its concrete production craft step is:
A, expansion drying: with the natural magnesium sulfate heptahydrate of purity 〉=99% (quality) in flash dryer fast, dewater to water content be 3-12%, be ground into the above puritan filler magnesium powder of 60 orders then.
B, granulation: puritan filler magnesium powder is added in the tablets press, add entry and make tackiness agent, carry out granulation; When treating in the tablets press that existing 70% particle reaches Φ 2-4mm and requires, from tablets press with the taking-up of granulation product, with the two-layer screen cloth of aperture 2mm, 4mm screen, classification, salable product enter next step, directly get back to tablets press granulation again less than 2mm; Greater than the material of 4mm, with getting back to tablets press granulation again after the pulverizer pulverizing.
C, drying: the salable product that granulation is good are sent into level sulfuration bed formula drying machine, the hot-wind inlet temperature is 180-200 ℃, carry out primary drying, add-on is 1500-2500kg/h, then 220-240 ℃ carry out redrying to the moisture mass content less than 5%, add-on is 1500-2500kg/h, tests simultaneously; Product hardness adopts Japan to produce log cabin formula pressure warning unit and measures.
D, the material cooling back packing of packing, being up to the standards both be the natural granular magnesium sulfate fertilizer finished product.
Natural granular magnesium sulfate fertilizer provided by the invention, particle slyness, even, not only water-soluble MgO mass content height, and hardness height.When mixing, be convenient to puddle evenly, reduce dust pollution and waste with other fertilizer.Be convenient to machinery during use and sow, can not cause environmental pollution.The inventive method has solved puritan filler magnesium and has been difficult to granulation, a difficult problem that granulation product hardness is low, has that technology is simple, advantages of simple operation, has vast market prospect.
Below with example this law is further described.
Embodiment
The following examples can help those skilled in the art more fully to understand the present invention, but do not limit the present invention in any way.
Embodiment 1:
A, expansion drying: with the natural magnesium sulfate heptahydrate of purity 〉=99% (quality) in flash dryer fast, dewater to water content be 8%, be ground into the above puritan filler magnesium powder of 60 orders then;
B, granulation: puritan filler magnesium powder is added in the tablets press, add the water that accounts for puritan filler magnesium opaque amount 15% and make tackiness agent, carry out granulation; When treating in the tablets press that existing 70% particle reaches Φ 2-4mm and requires, from tablets press with the taking-up of granulation product, with the two-layer screen cloth of aperture 2mm, 4mm screen, classification, salable product enter next step, directly get back to tablets press granulation again less than 2mm; Greater than the material of 4mm, with getting back to tablets press granulation again after the pulverizer pulverizing;
C, drying: the salable product that granulation is good are sent into level sulfuration bed formula drying machine, the hot-wind inlet temperature is 180-200 ℃, carry out primary drying, add-on is 1500-2500kg/h, then 220-240 ℃ carry out redrying to the moisture mass content less than 5%, add-on is 1500-2500kg/h, tests simultaneously; Product hardness adopts Japan to produce log cabin formula pressure warning unit and measures.
D, the material cooling back packing of packing, being up to the standards both be the natural granular magnesium sulfate fertilizer finished product.
The assay of products obtained therefrom is: outward appearance and granularity: Φ 2-4mm spheroidal particle; 2-4mm aperture sieve percent of pass: 95%; Hardness: 1.5kg/cm
2Water-soluble MgO mass content: 22%; Moisture mass content: 5%.
Embodiment 2:
The natural magnesium sulfate heptahydrate of getting purity and be 99.9% (quality) in flash dryer fast, dewater to water content be 3%, be ground into the above puritan filler magnesium powder of 60 orders then; Add the water that accounts for puritan filler magnesium opaque amount 25% and make tackiness agent, make natural granular magnesium sulfate fertilizer according to embodiment 1.
The assay of products obtained therefrom is: outward appearance and granularity: Φ 2-4mm spheroidal particle; 2-4mm aperture sieve percent of pass: 100%; Hardness: 0.5kg/cm
2Water-soluble MgO mass content: 29%; Moisture mass content: 0%.
Embodiment 3:
The natural magnesium sulfate heptahydrate of getting purity and be 99.8% (quality) in flash dryer fast, dewater to water content be 12%, be ground into the above puritan filler magnesium powder of 60 orders then; Add the water that accounts for puritan filler magnesium opaque amount 20% and make tackiness agent, make natural granular magnesium sulfate fertilizer according to embodiment 1.
The assay of products obtained therefrom is: outward appearance and granularity: Φ 2-4mm spheroidal particle; 2-4mm aperture sieve percent of pass: 98%; Hardness: 2.5kg/cm
2Water-soluble MgO mass content: 25%; Moisture mass content: 2.5%.
Embodiment 4:
Get granularity and be 80 orders, water-soluble MgO mass content and be 25.5%, the moisture mass content is 3.5% puritan filler magnesium powder, without expansion drying, directly joins in the tablets press, makes natural granular magnesium sulfate fertilizer according to embodiment 1.
The assay of products obtained therefrom is: outward appearance and granularity: Φ 2-4mm spheroidal particle; 2-4mm aperture sieve percent of pass: 98%; Hardness: 2.0kg/cm
2Water-soluble MgO mass content: 26%; Moisture mass content: 2.5%.
Claims (2)
1, a kind of natural granular magnesium sulfate fertilizer is characterized in that adopting the water that accounts for puritan filler magnesium opaque amount 15-25% to make tackiness agent, puritan filler magnesium is made through expansion drying, granulation, drying and packaging step, and had following technical characterictic:
Outward appearance and granularity Φ 2-4mm spheroidal particle
Percent of pass 2-4mm aperture sieve percent of pass 〉=95%
Moisture mass content 0-5%
Hardness 0.5-2.5kg/cm
2
Water-soluble MgO mass content 22-29%.
2, a kind of preparation method of natural granular magnesium sulfate fertilizer as claimed in claim 1, it is characterized in that adopting the water that accounts for puritan filler magnesium opaque amount 15-25% to make tackiness agent, puritan filler magnesium is made natural granular magnesium sulfate fertilizer by expansion drying, granulation, drying and packing; Its concrete production technique is:
A, expansion drying: with the natural magnesium sulfate heptahydrate of purity 〉=99% (quality) in flash dryer fast, dewater to water content be 3-12%, be ground into the above puritan filler magnesium powder of 60 orders then;
B, granulation: puritan filler magnesium powder is added in the tablets press, add entry and make tackiness agent, carry out granulation; When treating in the tablets press that existing 70% particle reaches Φ 2-4mm and requires, from tablets press with the taking-up of granulation product, with the two-layer screen cloth of aperture 2mm, 4mm screen, classification, salable product enter next step, directly get back to tablets press granulation again less than 2mm; Greater than the material of 4mm, with getting back to tablets press granulation again after the pulverizer pulverizing;
C, drying: the salable product that granulation is good are sent into level sulfuration bed formula drying machine, the hot-wind inlet temperature is 180-200 ℃, carry out primary drying, add-on is 1500-2500kg/h, then 220-240 ℃ carry out redrying to the moisture mass content less than 5%, add-on is 1500-2500kg/h, tests simultaneously;
D, packing: the material cooling back packing that is up to the standards both had been the natural granular magnesium sulfate fertilizer finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510119705 CN1810728A (en) | 2005-11-02 | 2005-11-02 | Natural granular magnesium sulfate fertilizer and its prepn process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510119705 CN1810728A (en) | 2005-11-02 | 2005-11-02 | Natural granular magnesium sulfate fertilizer and its prepn process |
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| CN1810728A true CN1810728A (en) | 2006-08-02 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100542957C (en) * | 2007-10-18 | 2009-09-23 | 南风化工集团股份有限公司 | A kind of prilling process of anhydrous sodium sulphate |
| CN101885514A (en) * | 2010-07-01 | 2010-11-17 | 吕文广 | Preparation for ultrafine anhydrous sulfate by a two-step method |
| CN102020490A (en) * | 2010-10-18 | 2011-04-20 | 营口菱镁化工（集团）有限公司 | Method for producing granular magnesium sulfate fertilizer |
| CN102775220A (en) * | 2012-08-22 | 2012-11-14 | 张�浩 | Disintegratable round-granule sulfur magnesium fertilizer and preparation method thereof |
| CN104446990A (en) * | 2014-11-25 | 2015-03-25 | 营口菱镁化工集团有限公司 | High-efficiency slow-release type granular magnesium sulfate and preparation method thereof |
-
2005
- 2005-11-02 CN CN 200510119705 patent/CN1810728A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100542957C (en) * | 2007-10-18 | 2009-09-23 | 南风化工集团股份有限公司 | A kind of prilling process of anhydrous sodium sulphate |
| CN101885514A (en) * | 2010-07-01 | 2010-11-17 | 吕文广 | Preparation for ultrafine anhydrous sulfate by a two-step method |
| CN101885514B (en) * | 2010-07-01 | 2012-08-29 | 吉林市弗兰达科技股份有限公司 | Preparation for ultrafine anhydrous sulfate by a two-step method |
| CN102020490A (en) * | 2010-10-18 | 2011-04-20 | 营口菱镁化工（集团）有限公司 | Method for producing granular magnesium sulfate fertilizer |
| CN102020490B (en) * | 2010-10-18 | 2013-03-27 | 营口菱镁化工（集团）有限公司 | Method for producing granular magnesium sulfate fertilizer |
| CN102775220A (en) * | 2012-08-22 | 2012-11-14 | 张�浩 | Disintegratable round-granule sulfur magnesium fertilizer and preparation method thereof |
| CN104446990A (en) * | 2014-11-25 | 2015-03-25 | 营口菱镁化工集团有限公司 | High-efficiency slow-release type granular magnesium sulfate and preparation method thereof |
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