CN107697934A - A kind of efficient reuse method of discarded magnesia carbon refractory - Google Patents
A kind of efficient reuse method of discarded magnesia carbon refractory Download PDFInfo
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- CN107697934A CN107697934A CN201711076578.5A CN201711076578A CN107697934A CN 107697934 A CN107697934 A CN 107697934A CN 201711076578 A CN201711076578 A CN 201711076578A CN 107697934 A CN107697934 A CN 107697934A
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- magnesia carbon
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- carbon refractory
- reuse method
- efficient reuse
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- 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
- C01F5/08—Magnesia by thermal decomposition of magnesium compounds by calcining magnesium hydroxide
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- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention provides a kind of efficient reuse method of discarded magnesia carbon refractory, comprises the following steps：Discarded magnesia carbon refractory is crushed；Discarded magnesia carbon refractory of the step 1 after broken is subjected to hydration process under water bath condition and obtains slurry；Slurry is subjected to ultrasonication；Slurry after ultrasonication is subjected to FLOTATION SEPARATION；The floating that step 4 FLOTATION SEPARATION obtains partially dried is obtained into graphite；The sediment fraction that FLOTATION SEPARATION is obtained is calcined, and is removed the part graphite for wherein failing separation and the vitreous carbon as caused by being carbonized bonding agent, is obtained magnesia.The efficient reuse method cost of the discarded magnesia carbon refractory of the present invention is low, easy to operate, easy to implement, and discarded magnesia carbon refractory can be made efficiently to be recycled.
Description
Technical field
The present invention relates to waste refractory materials treatment technology, more particularly to a kind of discarded magnesia carbon refractory efficiently again
Application way.
Background technology
Magnesia carbon refractory is one of refractory material the most frequently used in steel smelting procedure, is mainly used in converter and steel
Bag etc..Magnesia carbon refractory, using resin as bonding agent, passes through pressure mainly using magnesia and graphite as raw material after uniform stirring
It is shaped to product.
Because for the consideration in production and safe operation etc., the magnesium carbonaceous that these are built by laying bricks or stones in converter and ladle is resistance to
Fiery material is turning into discarded using when to a certain extent, reaching safe handling thickness limit it is necessary to be pulled down from converter and ladle
Refractory material.
For these discarded magnesia carbon refractories, the main reuse method used at present has：(1) as rudimentary resistance to
The raw material of fiery material uses；(2) slag making materials as smelting iron and steel uses；(3) used as road-making material.
Due to the native graphite of MgO and 12-20% containing nearly 75-80% in magnesia carbon refractory, therefore, no matter adopt
With which kind of above-mentioned reuse method, all do not make the important component-magnesia and native graphite in discarded magnesia carbon refractory
Efficiently utilized.
The content of the invention
It is an object of the present invention to the problem of existing during being recycled for discarded magnesia carbon refractory, proposes one
The efficient reuse method of the discarded magnesia carbon refractory of kind, this method cost is low, easy to operate, easy to implement, can make to give up
Magnesia carbon refractory is abandoned efficiently to be recycled.
To achieve the above object, the technical solution adopted by the present invention is：A kind of discarded magnesia carbon refractory efficiently again
Application way, comprise the following steps：
Step 1, discarded magnesia carbon refractory crushed；
Step 2, discarded magnesia carbon refractory of the step 1 after broken is subjected to hydration process under water bath condition starched
Expect, the volume ratio of solid and liquid is 1/2-1/5 in slurry；The MgO conversions discarded during hydration process in magnesia carbon refractory
For Mg (OH)2, produce volumetric expansion and enter slurry；
Step 3, slurry is subjected to ultrasonication, promotes hydrophobic graphite and Mg (OH)2Between separation；
Step 4, by after ultrasonication slurry carry out FLOTATION SEPARATION；
Step 5, the floating that step 4 FLOTATION SEPARATION obtains partially dried obtained into graphite；The precipitation that FLOTATION SEPARATION is obtained
Partial calcination, the part graphite for wherein failing separation and the vitreous carbon as caused by being carbonized bonding agent are removed, obtains magnesia.
Further, discarding magnesia carbon refractory includes following each component MgO 70-85%, the C 15- of weight proportion
30%.
Further, discarded magnesia carbon refractory is crushed to granularity and is less than 15mm by step 1.
Further, the temperature of the water-bath is higher than 80 DEG C, and hydration treatment time period is 2-10 hours.
Further, the ultrasonic treatment time 5-15 minutes, the ultrasonic frequency 20-100kHz of use.
Further, collecting agent used in the FLOTATION SEPARATION is kerosene, and addition is discarded magnesia carbon refractory amount
1-5%wt；Foaming agent is the alcohol of 2- ethyls six, and addition is the 1-3%wt of discarded magnesia carbon refractory.
Further, flotation time is 5-20 minutes
Further, the drying temperature is 80-100 DEG C, and drying time is that the 2-5 hours calcining heat is 800 DEG C,
Calcination time is 1-2 hours.
The efficient reuse method of the discarded magnesia carbon refractory of the present invention is led to for the characteristic of magnesia and native graphite
Cross to implementing broken, water-bath aquation, ultrasonication, FLOTATION SEPARATION and calcination processing with rear discarded magnesia carbon refractory,
The magnesia in discarded magnesia carbon refractory and graphite content is set to obtain efficiently separating and efficiently utilize, compared with prior art
Relatively there is advantages below：
1) this method cost is low, easy to operate, easy to implement；
2) MgO in discarded magnesia carbon refractory and component C can be made to obtain 100% and efficiently utilize.
Embodiment
The present invention is further described with reference to embodiments：
Reference examples 1-4 and the present embodiment 1-5 is according to water bath processing temperature when crushed material grain graininess, aquation, ultrasonic wave
The difference of frequency size and ultrasonic treatment time, separating treatment is carried out to discarded magnesia carbon refractory, obtains stone respectively
Ink and magnesia, the purpose of discarded magnesia carbon refractory is efficiently utilized to reach.
Specifically, using content of MgO as 80.9%, native graphite content is 15.2% by reference examples 1-4 and the present embodiment 1-5
Waste magnesia carbon bricks are objective for implementation, are crushed to variable grain granularity first.Produce the main original used during above-mentioned magnesia carbon brick
Expect be：The electric-melting magnesium of purity 98.1%, the native graphite of purity 97.5% and 3% resin.Weigh different grain size size
Each 10kg of magnesium carbonaceous fragment, put into aquation 12h in the water-bath of different temperatures.Slurry after aquation is taken out from water-bath and is put into
In rustless steel container, then handled at different frequencies using ultrasonic wave.After ultrasonication terminates, foaming is added in slurry
Agent and collecting agent, and stir certain time.After static certain time, portion takes out the object containing graphite from container, 80
12h is dried at DEG C and obtains graphite.For sediment fraction in container, 12h is dried at 80 DEG C, 3h is then calcined at 800 DEG C and is obtained
Obtain magnesia.
The computational methods of recycling graphite rate：The recycling graphite rate=(stone in quantity of graphite/10kg magnesium carbon particles that separation obtains
Black content) × 100%.Graphite and magnesia purity are determined using chemical analysis.Concrete outcome is as shown in table 1.
The reference examples 1-4 of table 1 and the present embodiment 1-5 reaction condition and experimental result
From table 1, passed through compared to reference examples 1-4 using embodiment 1-5 to real with rear discarded magnesia carbon refractory
Broken, water-bath aquation, ultrasonication, FLOTATION SEPARATION and calcination processing are applied, can be made in discarded magnesia carbon refractory
Magnesia and graphite content are efficiently separated, and are used when the magnesia and graphite purity of acquisition are close to production magnesia carbon brick originally
Electric-melting magnesium and native graphite purity.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (8)
1. a kind of efficient reuse method of discarded magnesia carbon refractory, it is characterised in that comprise the following steps：
Step 1, discarded magnesia carbon refractory crushed；
Step 2, discarded magnesia carbon refractory of the step 1 after broken is carried out to hydration process acquisition slurry under water bath condition,
The volume ratio of solid and liquid is 1/2-1/5 in slurry；
Step 3, slurry is subjected to ultrasonication；
Step 4, by after ultrasonication slurry carry out FLOTATION SEPARATION；
Step 5, the floating that step 4 FLOTATION SEPARATION obtains partially dried obtained into graphite；The sediment fraction that FLOTATION SEPARATION is obtained
Calcining, the part graphite for wherein failing separation and the vitreous carbon as caused by being carbonized bonding agent are removed, obtains magnesia.
2. the efficient reuse method of magnesia carbon refractory is discarded according to claim 1, it is characterised in that discarded magnesium carbon
Fire resistant materials include following each component MgO 70-85%wt, the C 15-30%wt of weight proportion.
3. the efficient reuse method of magnesia carbon refractory is discarded according to claim 1, it is characterised in that step 1 will
Discarded magnesia carbon refractory is crushed to granularity and is less than 15mm.
4. the efficient reuse method of magnesia carbon refractory is discarded according to claim 1, it is characterised in that the water-bath
Temperature be higher than 80 DEG C, hydration treatment time period is 2-10 hours.
5. the efficient reuse method of magnesia carbon refractory is discarded according to claim 1, it is characterised in that the ultrasound
Ripple processing time 5-15 minutes, the ultrasonic frequency 20-100kHz of use.
6. the efficient reuse method of magnesia carbon refractory is discarded according to claim 1, it is characterised in that the flotation
Collecting agent used in separation is kerosene, and addition is the 1-5%wt of discarded magnesia carbon refractory amount；Foaming agent is 2- ethyls six
Alcohol, addition are the 1-3%wt of discarded magnesia carbon refractory.
7. the efficient reuse method of magnesia carbon refractory is discarded according to claim 1, it is characterised in that FLOTATION SEPARATION
Time is 5-20 minutes.
8. the efficient reuse method of magnesia carbon refractory is discarded according to claim 1, it is characterised in that the drying
Temperature is 80-100 DEG C, and drying time is 2-5 hours；The calcining heat is 800 DEG C, and calcination time is 1-2 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711076578.5A CN107697934A (en) | 2017-11-06 | 2017-11-06 | A kind of efficient reuse method of discarded magnesia carbon refractory |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711076578.5A CN107697934A (en) | 2017-11-06 | 2017-11-06 | A kind of efficient reuse method of discarded magnesia carbon refractory |
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| CN107697934A true CN107697934A (en) | 2018-02-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112341218A (en) * | 2020-11-05 | 2021-02-09 | 中民驰远实业有限公司 | Method for preparing high-performance magnesium-zirconium composite ceramic tile by spark plasma sintering |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891489A (en) * | 2010-07-15 | 2010-11-24 | 裴七合 | Method for extracting regenerated carbon-containing fused magnesia from waste magnesia carbon bricks |
| CN102069036A (en) * | 2010-11-12 | 2011-05-25 | 山东乾舜矿冶科技股份有限公司 | Method for recycling waste magnesia carbon brick |
-
2017
- 2017-11-06 CN CN201711076578.5A patent/CN107697934A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891489A (en) * | 2010-07-15 | 2010-11-24 | 裴七合 | Method for extracting regenerated carbon-containing fused magnesia from waste magnesia carbon bricks |
| CN102069036A (en) * | 2010-11-12 | 2011-05-25 | 山东乾舜矿冶科技股份有限公司 | Method for recycling waste magnesia carbon brick |
Non-Patent Citations (1)
| Title |
|---|
| 詹怀宇: "《制浆原理与工程》", 31 January 2009, 中国轻工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112341218A (en) * | 2020-11-05 | 2021-02-09 | 中民驰远实业有限公司 | Method for preparing high-performance magnesium-zirconium composite ceramic tile by spark plasma sintering |
| CN112341218B (en) * | 2020-11-05 | 2022-04-12 | 中民驰远实业有限公司 | Method for preparing high-performance magnesium-zirconium composite ceramic tile by spark plasma sintering |
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Application publication date: 20180216 |