CN101214981B - Method for producing monohydrate magnesium sulfate by using gyration chemical synthesis device - Google Patents
Method for producing monohydrate magnesium sulfate by using gyration chemical synthesis device Download PDFInfo
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- CN101214981B CN101214981B CN2007101593466A CN200710159346A CN101214981B CN 101214981 B CN101214981 B CN 101214981B CN 2007101593466 A CN2007101593466 A CN 2007101593466A CN 200710159346 A CN200710159346 A CN 200710159346A CN 101214981 B CN101214981 B CN 101214981B
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- magnesium sulfate
- dilute sulphuric
- sulphuric acid
- acid
- hydrate
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Abstract
Disclosed is a method for producing magnesium phosphate by employing rotary forming devices, which is a method for formulating magnesium sulfate mono-hydrate using rotary forming devices and comprises preparing dilute sulphuric acid, mixing and reacting of dilute sulphuric acid and magnesium oxide powdered ore, preparing high temperature magnesium sulfate slurry with a crystal water, and then evacuating and chipping-crushing to obtain magnesium sulfate mono-hydrate after curing reaction. The invention is simple in method and easy in operation. Because the production is carried out by employing the rotary forming devices under the completely sealed condition with a water-circulating acid-accepting system, a large amount of acid mist generated in the process of formulating magnesium sulfate, mixed reacting and curing reaction can be treated via absorbing. Not only raw material is saved, but also any harmful gases are not discharged, which doses no harm to environment. The method is an ideal production method of magnesium sulfate mono-hydrate, resolving a series of problems in the existing method.
Description
Technical field
What the present invention announced is a kind of production method of magnesium sulfate monohydrate, the method that the revolution formation device that especially refers to utilize production of phosphate fertilizer to use is produced magnesium sulfate monohydrate.
Background technology
At present, producing magnesium sulfate monohydrate is to adopt simple box formation device, but this production method exists many problems.Because box formation device does not possess closed circulation system, the one, can not guarantee the continuity of producing.Magnesium oxide and sulfuric acid reaction move on other equipment again and are cured cutting after generating the sal epsom slurry.Be in addition this equipment in reaction process, a large amount of acid mists of generation all distribute in air, and environment is produced serious pollution, workman's operating condition is abominable, and labour intensity is big, the production cost height, the acid mist that produces during again owing to reaction all is discharged, and causes the waste of raw material resources again.Therefore say that existing production method is not very desirable.
Summary of the invention
The purpose of this invention is to provide the method that a kind of revolution formation device of using for reference production of phosphate fertilizer is produced magnesium sulfate monohydrate, to solve the practical problems that existing method exists.
Technical scheme of the present invention is as follows:
Employed revolution formation device comprises the graphite mixing tank among the present invention, mixing reactor, and revolution changes into device and water cycle is inhaled acid system.Its production process is: the curing reaction of the hybrid reaction of dilute sulphuric acid preparation, dilute sulphuric acid and magnesium oxide breeze and high temperature sal epsom slip, aspiration vacuum and cutting are handled.
Earlier the vitriol oil and complex acid water are pumped in the graphite mixing tank simultaneously, making concentration through mixed heat transfer is 50～80% dilute sulphuric acid, and the input amount ratio of the vitriol oil and complex acid water is 1～1.5: 1.The temperature requirement of dilute sulphuric acid is at 40～80 ℃.Then magnesium oxide breeze and dilute sulphuric acid are put into mixing reactor and carry out hybrid reaction.The input amount ratio of dilute sulphuric acid and magnesium oxide breeze is 2.5～3: 1.The content of magnesia of breeze requires 40～95%.Through fully stirring reaction, the sal epsom slurry of a crystal water of generation.Reacted slurry temperature remains on 100～120 ℃.And then with temperature of high temperature slurry be input to the revolution change in the device.Material changes in revolution and is cured reaction in the device, and aspiration vacuum and cutting are handled.Be 2～3 hours the set time of material.Aspiration vacuum level is 50～100mmHg.Cutting speed is 150～200r/min.After curing and cutting fragmentation, promptly make the finished product magnesium sulfate monohydrate.
The inventive method is simple, and is easy to implement.Because be the revolution formation device that adopts existing production of phosphate fertilizer.Make hybrid reaction at dilute sulphuric acid preparation, dilute sulphuric acid and magnesium oxide breeze, and a large amount of acid mists of being produced when revolution changes into the device curing reaction can both move in the water cycle suction acid system of sealing, be in operation and the absorption of acid mist handled through water, make that sour composition is thoroughly absorbed in the acid mist, not only saved raw materials for production, reduced production costs and without any discharge of harmful gases.Environment there is not any pollution.Improved workman's operating condition.It is a kind of production method of very good magnesium sulfate monohydrate.A series of problems that existing production method exists have been solved.
Description of drawings
Accompanying drawing turns round each bilge construction of formation device and process flow sheet for the present invention
Embodiment
Get 98% vitriol oil 600kg and water 600kg, add and carry out the dilute sulphuric acid preparation in the graphite acid mixing device respectively, the dilute sulphuric acid concentration after the preparation is 50%, and temperature is 65 ℃; With the dilute sulphuric acid for preparing and content of magnesia is that 70% magnesium slag 400kg joins in the mixing reactor simultaneously, carries out the thorough mixing reaction.React high temperature magnesium sulfate monohydrate slip more completely thereby make.The temperature of reaction back slip is 110 ℃; With this high temperature slip put into the revolution formation device in, be cured, aspirate, cut, set time 2hr; Aspiration vacuum level is about 70mmHg.Thereby obtain the work in-process magnesium sulfate monohydrate.This work in-process magnesium sulfate monohydrate is carried out fragmentation, granulation, drying, packing be finished product sal epsom.
Claims (4)
1. a method of using the revolution formation device to produce magnesium sulfate monohydrate is characterized in that its production process is: the curing reaction of the hybrid reaction of dilute sulphuric acid preparation, dilute sulphuric acid and magnesium oxide breeze and high temperature sal epsom slip, aspiration vacuum and cutting processing.
2. method according to claim 1, it is characterized in that the vitriol oil and complex acid water pump in the graphite mixing tank simultaneously, making concentration through mixed heat transfer is 50～80% dilute sulphuric acid, and the input amount ratio of the vitriol oil and complex acid water is 1～1.5: 1, and the temperature of dilute sulphuric acid is 40～80 ℃.
3. method according to claim 1, the input amount ratio that it is characterized in that dilute sulphuric acid and magnesium oxide breeze is 2.5～3: 1, the magnesian content requirement of breeze is 40～95%, through fully stirring reaction, the sal epsom slurry of a crystal water of generation.
4. method according to claim 1, be 2～3 hours set time that it is characterized in that material, and aspiration vacuum level is 50～100mmHg, and cutting speed is 150～200r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101593466A CN101214981B (en) | 2007-12-29 | 2007-12-29 | Method for producing monohydrate magnesium sulfate by using gyration chemical synthesis device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101593466A CN101214981B (en) | 2007-12-29 | 2007-12-29 | Method for producing monohydrate magnesium sulfate by using gyration chemical synthesis device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101214981A CN101214981A (en) | 2008-07-09 |
| CN101214981B true CN101214981B (en) | 2010-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007101593466A Active CN101214981B (en) | 2007-12-29 | 2007-12-29 | Method for producing monohydrate magnesium sulfate by using gyration chemical synthesis device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4096235A (en) * | 1974-02-21 | 1978-06-20 | Metallgesellschaft Aktiengesellschaft | Process of producing magnesia with sulfuric acid recycle |
| CN86105794A (en) * | 1986-07-25 | 1987-01-31 | 仝兆胜 | With magnesite is the method for raw material production kieserite |
| CN1536102A (en) * | 2003-04-10 | 2004-10-13 | 大连晶须材料有限公司 | Method for synthesizing magnesium salt whiskers |
| CN1212271C (en) * | 2002-09-13 | 2005-07-27 | 清华大学 | Method for integrated production of magnesium sulfate, magnesium carbonate and magnesium hydroxide from magnesite |
| CN1331817C (en) * | 2003-08-02 | 2007-08-15 | 唐春森 | Method for producing agricultural granular magnesium sulfate fertilizer |
-
2007
- 2007-12-29 CN CN2007101593466A patent/CN101214981B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4096235A (en) * | 1974-02-21 | 1978-06-20 | Metallgesellschaft Aktiengesellschaft | Process of producing magnesia with sulfuric acid recycle |
| CN86105794A (en) * | 1986-07-25 | 1987-01-31 | 仝兆胜 | With magnesite is the method for raw material production kieserite |
| CN1212271C (en) * | 2002-09-13 | 2005-07-27 | 清华大学 | Method for integrated production of magnesium sulfate, magnesium carbonate and magnesium hydroxide from magnesite |
| CN1536102A (en) * | 2003-04-10 | 2004-10-13 | 大连晶须材料有限公司 | Method for synthesizing magnesium salt whiskers |
| CN1331817C (en) * | 2003-08-02 | 2007-08-15 | 唐春森 | Method for producing agricultural granular magnesium sulfate fertilizer |
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| CN101214981A (en) | 2008-07-09 |
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Owner name: YINGKOU MAGNESITE CHEMICAL INDUSTRY GROUP CO., LTD Free format text: FORMER NAME: YINGKOU MAGNESITE CHEMICAL IND(GROUP)CO., LTD. |
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Address after: 115100 economic development zone around the city of Liaoning, Dashiqiao Patentee after: YINGKOU MAGNESITE CHEMICAL IND GROUP CO., LTD. Address before: 115100 Dashiqiao City, Liaoning Province South Loop MAGNESITE Building Economic Development Zone Patentee before: Yingkou Magnesite Chemical Ind (Group) Co., Ltd. |