SU680998A1 - Method of the preparation of magnesium oxide - Google Patents
Method of the preparation of magnesium oxideInfo
- Publication number
- SU680998A1 SU680998A1 SU721818670A SU1818670A SU680998A1 SU 680998 A1 SU680998 A1 SU 680998A1 SU 721818670 A SU721818670 A SU 721818670A SU 1818670 A SU1818670 A SU 1818670A SU 680998 A1 SU680998 A1 SU 680998A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- magnesium
- suspension
- solution
- gases
- temperature
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/02—Magnesia
- C01F5/06—Magnesia by thermal decomposition of magnesium compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/24—Magnesium carbonates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treating Waste Gases (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
1one
Изобретение относитс к способам получени окиси магни бикарбонатны методом, оно может быть использовано в химической промьниленностн.This invention relates to methods for producing magnesia with a bicarbonate method, it can be used in chemical industry.
Известен способ получени окиси магни путем карбонизации суспензии магнийсодержащих соединений под давлением , отделени шлама от раствора бикарбоната магни , декарбонизации этого раствора путем нагрева паром до 85-98 С и последующей кальцинации и спекани осадка 11,A method is known for producing magnesium oxide by carbonizing a suspension of magnesium-containing compounds under pressure, separating sludge from magnesium bicarbonate solution, decarbonating this solution by heating with steam to 85-98 ° C and subsequent calcination and sintering the precipitate 11,
Дл этого способа характерны нешлсокое качество получаемой окиси магни (SiO20,3 вес,%), а также значительные энергозатраты, св занные с расходом пара на термическое разложение (декарбонизацию) раствора бикарбоната магни .This method is characterized by the high quality of the magnesium oxide produced (SiO20.3 wt.%), As well as significant energy consumption associated with the steam consumption for thermal decomposition (decarbonization) of magnesium bicarbonate solution.
Цепью изобретени вл етс снижение содержани двуокиси кремни в продукте при одновременном уменьшении энергозатрат.The chain of the invention is to reduce the silica content of the product while reducing energy consumption.
Эта цель достигаетс тем, что раствор бикарбоната магни , полученный путем карбонизации магнийсодер жащих соед нений и отделенный от шлама, предварительно подогревают до 27-32 С и подаергают декарбонизации в присутствии затравки из тригидрокарбоната магни в количестве вес. 5-35 вес. % MgO от содержани окиси магни в растворе путем противоточного контактировани с газами кальцинации и спекани , полученную суспензию смешивают с ретурной окисью магни при 30-бО°С рН, рав- ном 7,5-8,5, и мол рном соотнсшении MgdlCOgls : MgO, равном 1:1,05-1,45. This goal is achieved in that the magnesium bicarbonate solution obtained by carbonizing the magnesium containing compounds and separated from the slurry is preheated to 27-32 ° C and decarbonated in the presence of magnesium trihydrocarbonate seed in an amount of weight. 5-35 weight. % MgO from the content of magnesium oxide in solution by countercurrent contact with calcination and sintering gases, the resulting suspension is mixed with retracting magnesium oxide at a pH of 7.5-8.5 and a molar ratio of MgdlCOgls: MgO equal to 1: 1.05-1.45.
0 Образовавшийс осадок тригидрокарбоната магни подвергают кальцинации и спеканию.0 The precipitate of magnesium trihydrocarbonate is subjected to calcination and sintering.
В качестве затравки из тригидрокарбоната магни используют декарбо5 низированную суспензию, предварительно подогретую до 80-100°С.As a seed from magnesium trihydrocarbonate, a decarbonated suspension, preheated to 80-100 ° C, is used.
Способ позвол ет получить окись магни с содержанием 98-99,5 вес.% MgO, уменьшить содержание двуокиси The method allows to obtain magnesium oxide with a content of 98-99.5 wt.% MgO, to reduce the content of dioxide
0 кремни в продукте до 0,1 вес.% и исключить применение пара на стадии карбонизации, что уменьшает энергозатраты .0 silicon in the product to 0.1 wt.% And exclude the use of steam at the stage of carbonization, which reduces energy consumption.
Способ заключаетс в следующем. The method is as follows.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU721818670A SU680998A1 (en) | 1972-08-08 | 1972-08-08 | Method of the preparation of magnesium oxide |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU721818670A SU680998A1 (en) | 1972-08-08 | 1972-08-08 | Method of the preparation of magnesium oxide |
Publications (1)
Publication Number | Publication Date |
---|---|
SU680998A1 true SU680998A1 (en) | 1979-08-25 |
Family
ID=20524312
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU721818670A SU680998A1 (en) | 1972-08-08 | 1972-08-08 | Method of the preparation of magnesium oxide |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU680998A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101654264B (en) * | 2009-10-09 | 2011-05-04 | 毛廷玉 | Special device for continuously preparing light magnesium carbonate by low-pressure pyrolysis |
CN104062200A (en) * | 2014-06-19 | 2014-09-24 | 中冶建筑研究总院有限公司 | Method for measuring content of free magnesium oxide in steel slag |
-
1972
- 1972-08-08 SU SU721818670A patent/SU680998A1/en active
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101654264B (en) * | 2009-10-09 | 2011-05-04 | 毛廷玉 | Special device for continuously preparing light magnesium carbonate by low-pressure pyrolysis |
CN104062200A (en) * | 2014-06-19 | 2014-09-24 | 中冶建筑研究总院有限公司 | Method for measuring content of free magnesium oxide in steel slag |
CN104062200B (en) * | 2014-06-19 | 2016-08-31 | 中冶建筑研究总院有限公司 | The assay method of free state content of magnesia in a kind of slag |
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