CN101475323A - Preparation method of high purity magnesia - Google Patents
Preparation method of high purity magnesia Download PDFInfo
- Publication number
- CN101475323A CN101475323A CNA2007101593682A CN200710159368A CN101475323A CN 101475323 A CN101475323 A CN 101475323A CN A2007101593682 A CNA2007101593682 A CN A2007101593682A CN 200710159368 A CN200710159368 A CN 200710159368A CN 101475323 A CN101475323 A CN 101475323A
- Authority
- CN
- China
- Prior art keywords
- purity
- preparation
- magnesite
- magnesite clinker
- powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
- C04B2/104—Ingredients added before or during the burning process
Abstract
The invention relates to a method for preparing high-purity magnesite clinker. The method is characterized in that the preparation method comprises that: according to weight proportion of 4:1, magnesite and graphite powder are mixed and roasted to form soft burnt magnesia powder; according to weight proportion of 5:1, the soft burnt magnesia powder with magnesium content of 95 percent and rare-earth magnesium are evenly mixed and pressed to form a pellet with diameter of between 40 and 50 mm; the volume density of the pellet is 2.5; and the pellet is sintered at high temperature to form the high-purity magnesite clinker. By the process, the high-purity magnesite clinker with purity of more than 99.8 percent can be obtained. The method for preparing the high-purity magnesite clinker has the advantages of improving the magnesium content of high and medium-grade magnesite clinker to 99.8 percent and simultaneously improving the volume density of the magnesite clinker to 3.5 above.
Description
Technical field
The present invention relates to a kind of preparation method of highly-purity magnesite, relate in particular to fire resisting material field and magnesian production correlative technology field, more specifically say so about the improvement of highly-purity magnesite production technology.
At present, the smelting process of traditional middle-grade magnesia is to utilize the magnesia powder magnesium content to reach more than 92%, and being processed into the above fine powder of 180 orders is raw material, compacting diameter 40-60mm pelletizing shape is smelted with coke, according to national standard, middle-grade magnesia content of magnesia is 95%, and volume density is 3.2.With traditional smelting process, the coke ratio is little in smelting process, and it is smelted the middle-grade magnesia magnesium content that and has reached 95%, but volume density does not reach 3.2.If the coke ratio is big in smelting process, volume density has reached requirement so, but because the pollution of coke ash, and middle-grade magnesia magnesium content does not reach 95%, therefore the quality of middle-grade magnesia is difficult to satisfy the demand in market.
With rhombspar and wagnerite be raw material produce the technical process of magnesia long, pollute big, cost is high, purity is low, is difficult to reach the standard of MgO content 98-99%.And this technology also needs the equipment of a cover system CaO, and investment is big, the heat energy consumption height.
Summary of the invention
Purpose of the present invention just is to avoid above-mentioned deficiency of the prior art, and a kind of preparation method of highly-purity magnesite is provided, thereby improves the quality and the volume density of middle-grade magnesia.
The above-mentioned purpose that the present invention proposes is achieved through the following technical solutions.
A kind of preparation method of highly-purity magnesite is characterized in that said preparation method is that 4:1 is baking mixed by weight proportion becomes light-magnesite powder with wagnerite and Graphite Powder 99; Get magnesium content and be 95% light-magnesite powder and rare earth magnesium by weight proportion 5:1 mix and be pressed into the pelletizing that diameter is 40～50mm, the pelletizing volume density is 2.5, high temperature sintering becomes highly-purity magnesite then.This technology can obtain the highly-purity magnesite of purity more than 99.8%.
Utilize the preparation method of highly-purity magnesite provided by the invention, its advantage is to improve middle-grade magnesia magnesium content to 99.8%, improves the magnesia volume density simultaneously and reaches more than 3.5 period.
Embodiment
Below in conjunction with embodiment the specific embodiment of the present invention is described in further detail.
Embodiment one: a kind of preparation method of highly-purity magnesite is characterized in that said preparation method is that 4:1 is baking mixed by weight proportion becomes light-magnesite powder with wagnerite and Graphite Powder 99; Get magnesium content and be 95% light-magnesite powder and rare earth magnesium by weight proportion 5:1 mix and be pressed into the pelletizing that diameter is 40～50mm, the pelletizing volume density is 2.5, high temperature sintering becomes highly-purity magnesite then.This technology can obtain the highly-purity magnesite of purity more than 99.8%.
Claims (1)
1, a kind of preparation method of highly-purity magnesite is characterized in that said preparation method is that 4:1 is baking mixed by weight proportion becomes light-magnesite powder with wagnerite and Graphite Powder 99; Get magnesium content and be 95% light-magnesite powder and rare earth magnesium by weight proportion 5:1 mix and be pressed into the pelletizing that diameter is 40～50mm, the pelletizing volume density is 2.5, high temperature sintering becomes highly-purity magnesite then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101593682A CN101475323A (en) | 2007-12-31 | 2007-12-31 | Preparation method of high purity magnesia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101593682A CN101475323A (en) | 2007-12-31 | 2007-12-31 | Preparation method of high purity magnesia |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101475323A true CN101475323A (en) | 2009-07-08 |
Family
ID=40836114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101593682A Pending CN101475323A (en) | 2007-12-31 | 2007-12-31 | Preparation method of high purity magnesia |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101475323A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103864119A (en) * | 2014-03-07 | 2014-06-18 | 华东理工大学 | Additive for producing macrocrystalline fused magnesite |
| CN103896502A (en) * | 2014-03-07 | 2014-07-02 | 华东理工大学 | Additive for producing high-purity fused magnesite |
| CN108455970A (en) * | 2018-06-01 | 2018-08-28 | 嘉晨集团有限公司 | A kind of technique using the double-deck sintering spray gun shaft furnace production highly-purity magnesite |
-
2007
- 2007-12-31 CN CNA2007101593682A patent/CN101475323A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103864119A (en) * | 2014-03-07 | 2014-06-18 | 华东理工大学 | Additive for producing macrocrystalline fused magnesite |
| CN103896502A (en) * | 2014-03-07 | 2014-07-02 | 华东理工大学 | Additive for producing high-purity fused magnesite |
| CN103864119B (en) * | 2014-03-07 | 2015-05-27 | 华东理工大学 | Method for using additive for producing macrocrystalline fused magnesite |
| CN103896502B (en) * | 2014-03-07 | 2015-12-30 | 华东理工大学 | A kind of additive producing high-purity electrosmelted magnesite clinker |
| CN108455970A (en) * | 2018-06-01 | 2018-08-28 | 嘉晨集团有限公司 | A kind of technique using the double-deck sintering spray gun shaft furnace production highly-purity magnesite |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090708 |