CN101624299B - Agricultural magnesium sulfate fertilizer, preparation method thereof and special mixing reactor thereof - Google Patents
Agricultural magnesium sulfate fertilizer, preparation method thereof and special mixing reactor thereof Download PDFInfo
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Abstract
The invention discloses an agricultural magnesium sulfate fertilizer (MgSO4.nH2O) mixture (hereinafter magnesium sulfate fertilizer for short), a preparation method thereof and a special mixing reactor thereof. The preparation method comprises the following steps: magnesium oxide ore powder is continuously added into a mixing reactor I from a magnesium ore powder inlet pipe (1); simultaneously, water and concentrated sulfuric acid are respectively added from a water inlet branch pipe (21) and a sulfuric acid inlet branch pipe (22); the water and the concentrated sulfuric acid are joined at a water acid mixing inlet main pipe (2) and then flow into the mixing reactor I to be mixed with the magnesium oxide ore powder so that a mixed slurry can be obtained after mixing reaction; the reaction temperature during the mixing reaction is controlled to be 112-155 DEG C; the mixed slurry after the reaction is sent into a conversion chamber for further reaction and curing; and the self reaction heat of the mixed slurry is utilized for baking and evaporating the water out in materials so that the materials can be dried and solidified. The preparation method of the agricultural magnesium sulfate fertilizer is simple realizes high production efficiency and high degree of mechanization without discharging sewage or solid waste and has little pollution.
Description
Technical field
The present invention relates to a kind of agricultural fertilizer and preparation method thereof and equipment, relate in particular to a kind of preparation method and specific equipment thereof that carries out hybrid reaction production agricultural magnesium sulfate fertilizer with the vitriol oil, water and powdery magnesium oxide.
Background technology
In the prior art, along with the development of agricultural fertilizer technology, sal epsom has obtained using widely as the necessary middle trace element fertilizer of farm crop.The kind of sal epsom fertilizer is a lot of in the market, industrial sulphuric acid magnesium (HG/F2680-95) is arranged, the by-product sal epsom after seawater or the salt lake salt manufacturing is arranged, and also has plenty of with powdery magnesium oxide to add the extensive sal epsom fertilizer of sulfuric acid chemistry synthetic.The production technique of this fertilizer is to use simple equipment with sulfuric acid, the simple hybrid reaction of powdery magnesium oxide more at present, and slaking, powder essence get final product.Production process is extensive, and reaction is incomplete, usefulness is low; The a large amount of acid mists that generate in the reaction process directly distribute in air, and air is produced serious pollution and causes the waste of raw material; The continuity of operation and mechanization degree are not high in addition.It is that 200910105505.3 Chinese invention patent application discloses a kind of method for preparing agricultural magnesium sulfate fertilizer that name is called a kind of agricultural magnesium sulfate fertilizer and preparation method thereof, application number: (1) stirs magnesium oxide breeze and water and is modulated into the magnesium oxide slurry in the device of sizing mixing; (2) magnesium oxide that mixes up slurry is sent in the mixing reactor carried out hybrid reaction with the sulfuric acid that adds this mixing reactor continuously; (3) reacted mixed slurry is sent into revolution and is changed into indoor further reaction slaking, and utilize the reaction heat baking of mixed slurry self evaporate moisture in the material make it dry solidification after the shaping packing the agricultural magnesium sulfate fertilizer finished product.Though the preparation method of the above-mentioned agricultural magnesium sulfate fertilizer prior art more preceding than this patent application obviously improved production efficiency, and reduced the atmospheric pollution of production process, but be modulated into the process of magnesium oxide slurry owing to also need magnesium oxide breeze and water stirred in the device of sizing mixing before hybrid reaction, this process has obviously formed restriction to further enhancing productivity.
Summary of the invention
First technical problem that the present invention will solve is to provide higher agricultural magnesium sulfate fertilizer of production efficiency and preparation method thereof;
Second technical problem that the present invention will solve provides the special mixing reactor of energy efficient production agricultural magnesium sulfate fertilizer.
The present invention adopts two kinds of technical schemes to solve first and second technical problem of the present invention respectively.
First kind of technical scheme of the present invention is as follows:
A kind of agricultural magnesium sulfate fertilizer, its molecular formula is: MgSO4.nH2O, its form is that the crystal water number n is the mixture of the multiple xln of arbitrary value between 0～7, contains the dirt of bringing in the magnesium oxide breeze raw material in the fertilizer, and this agricultural magnesium sulfate fertilizer is prepared by following method:
Added mixing reactor one at the magnesium oxide breeze continuously through the magnesium slag inlet pipe, add the entry and the vitriol oil respectively from water inlet arm and sulfuric acid inlet branch simultaneously, the described water and the vitriol oil converge the described mixing reactor one of inflow the water acid mixing inlet person in charge and carry out hybrid reaction formation mixed slurry with described magnesium oxide breeze, and the temperature of reaction of hybrid reaction process is controlled between 121 ℃～155 ℃; Reacted mixed slurry is admitted to revolution and changes into indoor further reaction slaking, and the moisture that utilizes the reaction heat baking of described mixed slurry self to evaporate in the material makes it dry solidification.
The concrete preparation method of above-mentioned agricultural magnesium sulfate fertilizer comprises the steps:
(1) from the magnesium slag inlet pipe magnesium oxide breeze is added the mixing reactor one continuously;
(2) add the entry and the vitriol oil respectively from water inlet arm and sulfuric acid inlet branch simultaneously, the described water and the vitriol oil converge the back the water acid mixing inlet person in charge and flow into described mixing reactor one, stir then, the described water and the vitriol oil and magnesium oxide breeze carry out hybrid reaction and form mixed slurry, and temperature of reaction is controlled between 121 ℃～155 ℃;
(3) reacted mixed slurry is sent into revolution and changed into indoor further reaction slaking, and the moisture that utilizes the reaction heat baking of mixed slurry self to evaporate in the material makes it dry solidification;
(4) mixture that slaking is good after the shaping packing the agricultural magnesium sulfate fertilizer finished product.
The mixing reactor one of above-mentioned preparation agricultural magnesium sulfate fertilizer comprises: reactor body, described reactor body inner chamber is provided with whipping appts, its top is provided with the magnesium slag inlet pipe and water acid mixes the inlet person in charge, the lower port that this water acid mixes the inlet person in charge is connected with described reactor body, its upper port is communicated with water inlet arm and sulfuric acid inlet branch respectively, and described water acid mixes the inlet person in charge, water inlet arm and sulfuric acid inlet branch and constitutes three-way pipe structure.
Described magnesium oxide breeze inlet pipe and water inlet arm are common iron steel pipe, and described sulfuric acid inlet branch and water acid mix inlet and is responsible for employing iron inner lining of steel pipe tetrafluoro antiseptic project plastics.
Second kind of technical scheme of the present invention is as follows:
A kind of agricultural magnesium sulfate fertilizer, its molecular formula is: MgSO4.nH2O, its form is that the crystal water number n is the mixture of the multiple xln of arbitrary value between 0～7, contains the dirt of bringing in the magnesium oxide breeze raw material in the fertilizer, it is characterized in that this agricultural magnesium sulfate fertilizer is prepared by following method:
Magnesium oxide breeze, water and the vitriol oil are added mixing reactor two continuously from magnesium slag inlet pipe, water inlet pipe and sulfuric acid inlet pipe respectively, described magnesium oxide breeze, water and the vitriol oil carry out hybrid reaction in described mixing reactor two, temperature of reaction is controlled between 121 ℃～155 ℃; Reacted mixed slurry is admitted to revolution and changes into indoor further reaction slaking, and the moisture that utilizes the reaction heat baking of described mixed slurry self to evaporate in the material makes it dry solidification.
The concrete preparation method of the agricultural magnesium sulfate fertilizer of second kind of technical scheme of the present invention comprises the steps:
(1) magnesium oxide breeze, water and the vitriol oil are added mixing reactor two continuously and are stirred from magnesium slag inlet pipe, water inlet pipe and sulfuric acid inlet pipe respectively;
(2) described magnesium oxide breeze, water and the vitriol oil carry out hybrid reaction and form mixed slurry in described mixing reactor two, and the temperature of hybrid reaction is controlled between 121 ℃～155 ℃;
(3) reacted mixed slurry is sent into revolution and changed into indoor further reaction slaking, and the moisture that utilizes the reaction heat baking of mixed slurry self to evaporate in the material makes it dry solidification;
(4) mixture that slaking is good after the shaping packing the agricultural magnesium sulfate fertilizer finished product.
The mixing reactor two of implementing preparation agricultural magnesium sulfate fertilizer of the present invention comprises: reactor body, described reactor body inner chamber is provided with whipping appts, and its top is respectively arranged with magnesium slag inlet tube, water inlet pipe and the sulfuric acid inlet pipe that respectively has independent access road of one's own.
Described magnesium oxide breeze inlet tube and water inlet pipe are common iron steel pipe, and described sulfuric acid inlet pipe adopts iron inner lining of steel pipe tetrafluoro antiseptic project plastics.
Compare with prior art, agricultural magnesium sulfate fertilizer of the present invention and preparation method thereof has following advantage with special mixing reactor: be modulated into the process of magnesium oxide slurry owing to omitted magnesium oxide breeze and water stirred in the device of sizing mixing, therefore Production Flow Chart and production unit all obtain simplifying, thereby have further improved the production efficiency of agricultural magnesium sulfate fertilizer.
Description of drawings
Fig. 1 is the structural representation that the present invention prepares the mixing reactor one that agricultural magnesium sulfate fertilizer adopts;
Fig. 2 is the structural representation that the present invention prepares the mixing reactor two that agricultural magnesium sulfate fertilizer adopts.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Agricultural magnesium sulfate fertilizer of the present invention, its molecular formula is: MgSO4.nH2O, its form is that the crystal water number n is the mixture of the multiple xln of arbitrary value between 0～7, hereinafter to be referred as agricultural magnesium sulfate fertilizer, contains the dirt of bringing in the magnesium oxide breeze raw material in the fertilizer.The special feature that the present invention is different from prior art is to prepare the method for agricultural magnesium sulfate fertilizer and the special mixing reactor of enforcement preparation agricultural magnesium sulfate fertilizer thereof.
The present invention has designed following two kinds of specific equipments that prepare the processing method of agricultural magnesium sulfate fertilizer.
First kind of processing method for preparing agricultural magnesium sulfate fertilizer comprises the steps:
(1), from magnesium slag inlet pipe 1 the magnesium oxide breeze is added (structural representation of described mixing reactor one as shown in Figure 1) the mixing reactor one continuously;
(2), simultaneously add the entry and the vitriol oil respectively from water inlet arm 21 and sulfuric acid inlet branch 22 equably continuously, the described vitriol oil and water are responsible for 2 at water acid mixing inlet and are converged the described mixing reactor one of dilution back inflow, stir then, sulfuric acid after the dilution and magnesium oxide breeze carry out hybrid reaction and form mixed slurry, regulate the vitriol oil, the add-on of magnesia powder and water makes the temperature of reaction of this mixing reactor exit mixed slurry be controlled between 121 ℃～155 ℃, if the mixed slurry temperature is low excessively, then reaction not exclusively, poor product quality, next step set time is long; If the mixed slurry temperature is too high, material will burn by sintering when slaking is solidified, the free acid content height, increase broken difficulty or output waste product substandard products, the height of this temperature of reaction is relevant with the size of n value in the above-mentioned magnesium sulfate fertilizer molecular formula, and in general, the size of temperature of reaction and n value is inversely proportional to;
(3), reacted mixed slurry being sent into revolution changes into the chamber (this equipment is consulted and used the standard equipment that general calcium is produced, its structure model can be looked into the phosphate fertilizer design manual) in further reaction slaking, and the moisture that utilizes the reaction heat baking of mixed slurry self to evaporate in the material makes it dry solidification;
(4), mixture that slaking is good through cut out continuously, fragmentation, through the packing then of belt conveyor cooling at a slow speed, be powdery magnesium sulfate fertilizer finished product, or after the dish granulation of garden, pack particle magnesium sulfate fertilizer finished product.
The mass percent concentration of the described vitriol oil of above-mentioned adding mixing reactor one is 80% to 98%, and the weight proportion of described magnesium oxide breeze and this vitriol oil is 1: the weight proportion of the described vitriol oil of 1.5-1.85 and water is 1: 0.7-0.2.
Mixing reactor one interior mixed slurry reaction time was controlled in 2 minutes in the above-mentioned steps (2).
It is 30 to 90 minutes that the residence time is solidified in the slaking of above-mentioned steps (3) mixed slurry, if slaking is too short set time, slaking is not enough, in the cooling packing process secondary temperature elevation reaction can take place when moisture is excessive, and the big quality of product moisture is not high, and the packing back is caking easily; If slaking is oversize set time, then product hardness increases, and is difficult for brokenly, and revolution simultaneously changes into that the chamber utilization ratio is low, production capacity is low.
Described magnesium oxide breeze is made through the calcining abrasive dust by magnesite, and its magnesian content must be greater than 65%, the too low quality that then can influence made magnesium sulfate fertilizer.
Adopt above-mentioned agricultural magnesium sulfate fertilizer preparation method must use special-purpose mixing reactor one, as shown in Figure 1, this mixing reactor one comprises reactor body 3, described reactor body 3 inner chambers are provided with whipping appts 8, its top is provided with magnesium slag inlet pipe 1 and water acid mixes the inlet person in charge 2, the lower port that this water acid mixes the inlet person in charge 2 is connected with described reactor body 3, its upper port is communicated with water inlet arm 21 and sulfuric acid inlet branch 22 respectively, and described water acid mixes the inlet person in charge 2, water inlet arm 21 and sulfuric acid inlet branch 22 and constitutes three-way pipe structures.
Magnesium slag inlet pipe 1 shown in Figure 1 and water inlet arm 21 are common iron steel pipe, and described sulfuric acid inlet branch 22 and water acid mix inlet and is responsible for 2 employing iron inner lining of steel pipe tetrafluoro antiseptic project plastics.
Second kind of processing method for preparing agricultural magnesium sulfate fertilizer comprises the steps:
(1) magnesium oxide breeze, water and the vitriol oil are added mixing reactor two continuously and are stirred from magnesium slag inlet pipe 4, water inlet pipe 5 and sulfuric acid inlet pipe 6 respectively;
(2) described magnesium oxide breeze, water and the vitriol oil carry out hybrid reaction and form mixed slurry in described mixing reactor two, the add-on of regulating the vitriol oil, magnesia powder and water makes the temperature of reaction of this mixing reactor exit mixed slurry be controlled between 121 ℃～155 ℃, if the mixed slurry temperature is low excessively, then reaction not exclusively, poor product quality, next step set time is long; If the mixed slurry temperature is too high, material will burn by sintering when slaking is solidified, the free acid content height, increase broken difficulty or output waste product substandard products, the height of this temperature of reaction is relevant with the size of n value in the above-mentioned magnesium sulfate fertilizer molecular formula, and in general, the size of temperature of reaction and n value is inversely proportional to;
(3) reacted mixed slurry being sent into revolution changes into the chamber (this equipment is consulted and used the standard equipment that general calcium is produced, its structure model can be looked into the phosphate fertilizer design manual) in further reaction slaking, and the moisture that utilizes the reaction heat baking of mixed slurry self to evaporate in the material makes it dry solidification;
(4) mixture that slaking is good through cut out continuously, fragmentation, through the packing then of belt conveyor cooling at a slow speed, be powdery magnesium sulfate fertilizer finished product, or after the dish granulation of garden, pack particle magnesium sulfate fertilizer finished product.
The mass percent concentration of the described vitriol oil of above-mentioned adding mixing reactor one is 80% to 98%, and the weight proportion of described magnesium oxide breeze and this vitriol oil is 1: 1.5-1.85, the weight proportion of the described vitriol oil and water are 1: 0.7-0.2.
Mixing reactor one interior mixed slurry reaction time was controlled in 2 minutes in the above-mentioned steps (2).
It is 30 to 90 minutes that the residence time is solidified in the slaking of above-mentioned steps (3) mixed slurry, if slaking is too short set time, slaking is not enough, in the cooling packing process secondary temperature elevation reaction can take place when moisture is excessive, and the big quality of product moisture is not high, and the packing back is caking easily; If slaking is oversize set time, then product hardness increases, and is difficult for brokenly, and revolution simultaneously changes into that the chamber utilization ratio is low, production capacity is low.
Above-mentioned magnesium oxide breeze is made through the calcining abrasive dust by magnesite, and its magnesian content must be greater than 65%, the too low quality that then can influence made magnesium sulfate fertilizer.
Adopt second kind of agricultural magnesium sulfate fertilizer preparation method must use special-purpose mixing reactor two, as shown in Figure 2, this mixing reactor two comprises: reactor body 7, described reactor body 7 inner chambers are provided with whipping appts 8 equally, and its top then is respectively arranged with magnesium slag inlet tube 4, water inlet pipe 5 and the sulfuric acid inlet pipe 6 that respectively has independent access road of one's own.
The magnesium slag inlet tube 4 of described mixing reactor two and water inlet pipe 5 are common iron steel pipe, and described sulfuric acid inlet pipe 6 adopts iron inner lining of steel pipe tetrafluoro antiseptic project plastics.
Below be several specific embodiments of the preparation method of agricultural magnesium sulfate fertilizer of the present invention:
Embodiment one, 100 tons of magnesium sulfate fertilizers of production
1, gets 65 tons of the vitriol oils that concentration is 92.5% (mass percent), fetch water 25 tons, join respectively equably continuously in proportion in sulfuric acid inlet branch 22 and the water inlet arm 21 and and mix first mixed diluting among the inlet person in charge 2, and be sent to one li of mixing reactor continuously in water acid.
2, get 36 tons of the magnesium oxide breezes that content of magnesia is 85% (mass percent), join equably continuously in proportion in the mixing reactor one with dilution after the sulfuric acid sent into continuously carry out the thorough mixing reaction.In mixing reactor one exit, the temperature at hybrid reaction slurry outlet place is controlled at 140 ℃ approximately, and slip dried dilution in exit is moderate.
3, reacted hybrid reaction slip being sent constantly into revolution changes into indoor stop and carries out slaking and solidify, change into indoor stop after 50 minutes in revolution, through shaping, cooling etc., promptly obtain the powdery sal epsom fertilizer of MgSO4.nH2O mixture form, promptly become the agricultural magnesium sulfate fertilizer finished product through packing.
Embodiment two, 100 tons of magnesium sulfate fertilizers of production
1, gets 60 tons of the vitriol oils that concentration is 98% (mass percent), fetch water 34 tons, join respectively equably continuously in proportion in sulfuric acid inlet branch 22 and the water inlet arm 21 and and mix first mixed diluting among the inlet person in charge 2, and be sent to one li of mixing reactor continuously in water acid.
2, get 38 tons of the magnesium oxide breezes that content of magnesia is 70% (mass percent), in proportion successive join equably in the mixing reactor one with dilution after the dilute sulphuric acid sent into continuously carry out the thorough mixing reaction.In mixing reactor one exit, the temperature at hybrid reaction slurry outlet place is controlled at 150 ℃ approximately.And it is moderate that the exit slip is done dilution.
3, reacted hybrid reaction slip being sent constantly into revolution changes into indoor stop and carries out slaking and solidify, change into indoor stop after 40 minutes in revolution, through shaping, cooling etc., promptly obtain the powdery sal epsom fertilizer of MgSO4.nH2O mixture form, promptly become the agricultural magnesium sulfate fertilizer finished product through packing.
Embodiment three, 100 tons of magnesium sulfate fertilizers of production
1, gets 70 tons of the vitriol oils that concentration is 85% (mass percent), fetch water 25 tons, join two li of mixing reactors in proportion continuously equably respectively.
2, get 42 tons of the magnesium oxide breezes that content of magnesia is 65% (mass percent), join equably continuously in proportion in the mixing reactor two and carry out the thorough mixing reaction with the vitriol oil of sending into continuously and water.In mixing reactor two exits, the temperature at hybrid reaction slurry outlet place is controlled at 125 ℃ approximately, and slip dried dilution in exit is moderate.
3, reacted hybrid reaction slip being sent constantly into revolution changes into indoor stop and carries out slaking and solidify, change into indoor stop after 80 minutes in revolution, through shaping, cooling etc., promptly obtain the powdery sal epsom fertilizer of MgSO4.nH2O mixture form, promptly become the agricultural magnesium sulfate fertilizer finished product through packing.
Claims (10)
1. the preparation method of an agricultural magnesium sulfate fertilizer, it is characterized in that, described agricultural magnesium sulfate fertilizer uses mixing reactor one to prepare, this mixing reactor one comprises reactor body (3), described reactor body (3) inner chamber is provided with whipping appts (8), its top is provided with magnesium slag inlet pipe (1) and water acid mixes the inlet person in charge (2), the lower port that this water acid mixes the inlet person in charge (2) is connected with described reactor body (3), its upper port is communicated with water inlet arm (21) and sulfuric acid inlet branch (22) respectively, and described water acid mixes inlet and is responsible for (2), water inlet arm (21) and sulfuric acid inlet branch (22) constitute three-way pipe structure;
Described preparation method comprises the steps:
(1) from magnesium slag inlet pipe (1) the magnesium oxide breeze is added the mixing reactor one continuously;
(2) add the entry and the vitriol oil respectively from water inlet arm (21) and sulfuric acid inlet branch (22) simultaneously, the described water and the vitriol oil converge the described mixing reactor one of inflow the water acid mixing inlet person in charge (2) and stir then, the described water and the vitriol oil and magnesium oxide breeze carry out hybrid reaction and form mixed slurry, and temperature of reaction is controlled between 121 ℃～155 ℃;
(3) reacted mixed slurry is sent into revolution and changed into indoor further reaction slaking, and the moisture that utilizes the reaction heat baking of mixed slurry self to evaporate in the material makes it dry solidification;
(4) mixture that slaking is good after the shaping packing the agricultural magnesium sulfate fertilizer finished product.
2. the preparation method of agricultural magnesium sulfate fertilizer according to claim 1, it is characterized in that: the mass percent concentration that adds the described vitriol oil of mixing reactor one is 80% to 98%, the weight proportion of described magnesium oxide breeze and this vitriol oil is 1: 1.5-1.85, the weight proportion of the described vitriol oil and water are 1: 0.7-0.2.
3. the preparation method of agricultural magnesium sulfate fertilizer according to claim 1 and 2 is characterized in that: in the described step (2) in the mixing reactor one the mixed slurry reaction time be controlled in 2 minutes.
4. the preparation method of agricultural magnesium sulfate fertilizer according to claim 1 and 2 is characterized in that: it is 30 to 90 minutes that the residence time is solidified in the slaking of described step (3) mixed slurry.
5. the preparation method of agricultural magnesium sulfate fertilizer according to claim 1 and 2 is characterized in that: described magnesium oxide breeze is made through the calcining abrasive dust by magnesite, and its magnesian content is greater than 65%.
6. the preparation method of an agricultural magnesium sulfate fertilizer, it is characterized in that, described agricultural magnesium sulfate fertilizer uses mixing reactor two to prepare, this mixing reactor two comprises reactor body (7), described reactor body (7) inner chamber is provided with whipping appts (8), and its top is respectively arranged with magnesium slag inlet tube (4), water inlet pipe (5) and the sulfuric acid inlet pipe (6) that respectively has independent access road of one's own;
Described preparation method comprises the steps:
(1) magnesium oxide breeze, water and the vitriol oil are added mixing reactor two continuously and are stirred from magnesium slag inlet pipe (4), water inlet pipe (5) and sulfuric acid inlet pipe (6) respectively;
(2) described magnesium oxide breeze, water and the vitriol oil carry out hybrid reaction and form mixed slurry in described mixing reactor two, and the temperature of hybrid reaction is controlled between 121 ℃～155 ℃;
(3) reacted mixed slurry is sent into revolution and changed into indoor further reaction slaking, and the moisture that utilizes the reaction heat baking of mixed slurry self to evaporate in the material makes it dry solidification;
(4) mixture that slaking is good after the shaping packing the agricultural magnesium sulfate fertilizer finished product.
7. the preparation method of agricultural magnesium sulfate fertilizer according to claim 6, it is characterized in that: the mass percent concentration that adds the described vitriol oil of mixing reactor two is 80% to 98%, described magnesium oxide breeze and this vitriolic weight proportion are 1: 1.5-1.85, the weight proportion of the described vitriol oil and water are 1: 0.7-0.2.
8. according to the preparation method of claim 6 or 7 described agricultural magnesium sulfate fertilizers, it is characterized in that: mixing reactor two interior mixed slurry reaction times were controlled in 2 minutes in the described step (2).
9. according to the preparation method of claim 6 or 7 described agricultural magnesium sulfate fertilizers, it is characterized in that: it is 30 to 90 minutes that the residence time is solidified in the slaking of described step (3) mixed slurry.
10. according to the preparation method of claim 6 or 7 described agricultural magnesium sulfate fertilizers, it is characterized in that: described magnesium oxide breeze is made through the calcining abrasive dust by magnesite, and its magnesian content is greater than 65%.
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| CN106278660A (en) * | 2016-08-30 | 2017-01-04 | 茂名市新东方微肥有限公司 | A kind of magnesium sulfate chemical fertilizer |
| DE102017104877A1 (en) | 2017-03-08 | 2018-09-13 | K+S Aktiengesellschaft | Magnesium sulfate granules based on synthetic magnesium sulfate |
| CN107875994B (en) * | 2017-12-13 | 2024-03-29 | 青岛锐丰源化工有限公司 | Magnesia high temperature reactor |
| DE102019007587A1 (en) | 2019-10-31 | 2021-05-06 | K+S Aktiengesellschaft | Process for the production of sulphurous potash granules |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2396881Y (en) * | 1999-12-03 | 2000-09-20 | 中国科学院南京土壤研究所 | Mixed reactor |
| CN1580000A (en) * | 2003-08-02 | 2005-02-16 | 唐春森 | Method for producing agricultural granular magnesium sulfate fertilizer |
| CN1733656A (en) * | 2005-08-01 | 2006-02-15 | 六合天融（北京）环保科技有限公司 | Method for manufacturing magnesium sulphate hepta hydrate fertilizer using boiler flue gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2396881Y (en) * | 1999-12-03 | 2000-09-20 | 中国科学院南京土壤研究所 | Mixed reactor |
| CN1580000A (en) * | 2003-08-02 | 2005-02-16 | 唐春森 | Method for producing agricultural granular magnesium sulfate fertilizer |
| CN1733656A (en) * | 2005-08-01 | 2006-02-15 | 六合天融（北京）环保科技有限公司 | Method for manufacturing magnesium sulphate hepta hydrate fertilizer using boiler flue gas |
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Effective date of registration: 20161125 Address after: Singapore beach Boulevard Patentee after: Germany, Asia Pacific Pte Ltd Address before: 518172 Guangdong, Longgang District Center City Fuk Garden District 1-204 Patentee before: Tang Chunsen Patentee before: Chen Yuguo |