CN108793779A - A kind of preparation method of activity magnesia - Google Patents
A kind of preparation method of activity magnesia Download PDFInfo
- Publication number
- CN108793779A CN108793779A CN201810746060.6A CN201810746060A CN108793779A CN 108793779 A CN108793779 A CN 108793779A CN 201810746060 A CN201810746060 A CN 201810746060A CN 108793779 A CN108793779 A CN 108793779A
- Authority
- CN
- China
- Prior art keywords
- added
- minutes
- magnesia
- preparation
- mixture
- 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.)
- Withdrawn
Links
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
- C04B2/102—Preheating, burning calcining or cooling of magnesia, e.g. dead burning
Abstract
The present invention relates to a kind of preparation methods of active magnesia.Its technical solution is：Magnisite is milled to granularity≤0.1mm, obtains ball milling material；The ball milling material is placed in Muffle furnace, is calcined 30~40 minutes under the conditions of 800~850 DEG C, calcining material is obtained；The water for accounting for 45~50wt% of the calcining material is added into the calcining material, mixes 5~8 minutes, obtains mixture；The hydrofluoric acid solution for accounting for the 3~4wt% of mixture is added into the mixture, mixes 8~10 minutes, stores 3~5 hours under room temperature, obtain presoma material；The presoma material is added in Muffle furnace, is calcined 20~30 minutes under the conditions of 1260~1300 DEG C, furnace cooling is to get active magnesia.Present invention process is simple, and prepared active purity of magnesite is high, reactivity is good and sintering character is excellent.
Description
Technical field
The invention belongs to magnesia technical fields.More particularly to a kind of preparation method of active magnesia.
Background technology
Magnesia be using MgO as main chemical compositions, with the synthesis material that periclase is main object phase, for magnesia brick, magnesium carbon
The preparation of the basic refractories such as brick and magnesia-calcium brick.The chemism of magnesia is higher, prepared basic refractory agglutinating property
It can be better.Therefore, the activity of magnesia directly determines the comprehensive performance of basic refractory and correlated product.
Currently, active magnesia is made mainly with magnesite (or clout after magnesite flotation) for raw material after light-burned activation
, its shortcoming is that impurity composition (such as SiO in magnesite (or clout after magnesite flotation)2、Al2O3Deng) easily with MgO it is anti-
The compounds such as olivine or spinelle should be formed, the content of free MgO is on the one hand reduced, on the other hand also affects magnesia
Reactivity reduces the sintering character of magnesia.
Invention content
The purpose of the present invention is to provide the preparation methods of active magnesia a kind of simple for process and at low cost.Use this method
Prepared active purity of magnesite is high, activity is good and sintering character is excellent.
To achieve the above object, the technical solution adopted by the present invention comprises the concrete steps that：
Magnisite is added in ball mill the first step, is milled to granularity≤0.1mm, obtains ball milling material.
The ball milling material is placed in Muffle furnace by second step, is calcined 30~40 minutes, is obtained under the conditions of 800~850 DEG C
Calcining material.
The water for accounting for 45~50wt% of the calcining material is added into the calcining material for third step, mixes 5~8 minutes, obtains
Mixture.
The hydrofluoric acid solution for accounting for the 3~4wt% of mixture is added into the mixture for 4th step, mixes 8~10 points
Clock is stored 3~5 hours, obtains presoma material under room temperature.
The presoma material is added in Muffle furnace 5th step, is calcined 20~30 minutes under the conditions of 1260~1300 DEG C,
Activity magnesia is made in furnace cooling.
The main chemical compositions of the magnisite are：MgCO3Content >=95wt%；SiO2Content≤2wt%.
The hydrofluoric acid solution is that chemistry is pure；0.2~0.5mol/L of concentration of the hydrofluoric acid solution.
Due to the adoption of the above technical scheme, the present invention has the positive effect that compared with prior art：
1, in preparation process of the present invention only will after magnesite ball milling calcine, mix and secondary clacining, be not necessarily to special processing
Equipment and complicated preparation method, preparation process is simple and production cost is low.
2, the present invention first will be digested after magnesite calcining and activating, cleaned using hydrofluoric acid and introduce Fluorine source, improve magnesia
Purity simultaneously promotes periclase grain crystalline to be nucleated, and improves the reactivity of magnesia, sintering character is excellent.
Active magnesia prepared by the present invention is after testing：Free content of MgO is 98.5~99.0wt%, specific surface area 20
~25m2/g。
Therefore, the present invention has the characteristics that simple for process low with production cost；Prepared active purity of magnesite is high, reacts
Activity is good and sintering character is excellent.
Specific implementation mode
The invention will be further described With reference to embodiment, not to the limitation of its protection domain.
It is first that the technical parameter Unify legislation of material involved by present embodiment is as follows to avoid repeating, embodiment
In repeat no more：
The main chemical compositions of the magnisite are：MgCO3Content >=95wt%；SiO2Content≤2wt%.
The hydrofluoric acid solution is that chemistry is pure；0.2~0.5mol/L of concentration of the hydrofluoric acid solution.
Embodiment 1
A kind of preparation method of activity magnesia.Preparation method described in the present embodiment comprises the concrete steps that：
Magnisite is added in ball mill the first step, is milled to granularity≤0.1mm, obtains ball milling material.
The ball milling material is placed in Muffle furnace by second step, is calcined 30~40 minutes, is obtained under the conditions of 800~820 DEG C
Calcining material.
The water for accounting for 45~47wt% of the calcining material is added into the calcining material for third step, mixes 5~8 minutes, obtains
Mixture.
The hydrofluoric acid solution for accounting for the 3~4wt% of mixture is added into the mixture for 4th step, mixes 8~10 points
Clock is stored 3~5 hours, obtains presoma material under room temperature.
The presoma material is added in Muffle furnace 5th step, is calcined 20~30 minutes under the conditions of 1260~1276 DEG C,
Activity magnesia is made in furnace cooling.
Activity magnesia manufactured in the present embodiment is after testing：Free content of MgO is 98.5~98.7wt%, specific surface area 20
~22m2/g。
Embodiment 2
A kind of preparation method of activity magnesia.Preparation method described in the present embodiment comprises the concrete steps that：
Magnisite is added in ball mill the first step, is milled to granularity≤0.1mm, obtains ball milling material.
The ball milling material is placed in Muffle furnace by second step, is calcined 30~40 minutes, is obtained under the conditions of 810~830 DEG C
Calcining material.
The water for accounting for 46~48wt% of the calcining material is added into the calcining material for third step, mixes 5~8 minutes, obtains
Mixture.
The hydrofluoric acid solution for accounting for the 3~4wt% of mixture is added into the mixture for 4th step, mixes 8~10 points
Clock is stored 3~5 hours, obtains presoma material under room temperature.
The presoma material is added in Muffle furnace 5th step, is calcined 20~30 minutes under the conditions of 1268~1284 DEG C,
Activity magnesia is made in furnace cooling.
Activity magnesia manufactured in the present embodiment is after testing：Free content of MgO is 98.6~98.8wt%, specific surface area 21
~23m2/g。
Embodiment 3
A kind of preparation method of activity magnesia.Preparation method described in the present embodiment comprises the concrete steps that：
Magnisite is added in ball mill the first step, is milled to granularity≤0.1mm, obtains ball milling material.
The ball milling material is placed in Muffle furnace by second step, is calcined 30~40 minutes, is obtained under the conditions of 820~840 DEG C
Calcining material.
The water for accounting for 47~49wt% of the calcining material is added into the calcining material for third step, mixes 5~8 minutes, obtains
Mixture.
The hydrofluoric acid solution for accounting for the 3~4wt% of mixture is added into the mixture for 4th step, mixes 8~10 points
Clock is stored 3~5 hours, obtains presoma material under room temperature.
The presoma material is added in Muffle furnace 5th step, is calcined 20~30 minutes under the conditions of 1276~1292 DEG C,
Activity magnesia is made in furnace cooling.
Activity magnesia manufactured in the present embodiment is after testing：Free content of MgO is 98.7~98.9wt%, specific surface area 22
~24m2/g。
Embodiment 4
A kind of preparation method of activity magnesia.Preparation method described in the present embodiment comprises the concrete steps that：
Magnisite is added in ball mill the first step, is milled to granularity≤0.1mm, obtains ball milling material.
The ball milling material is placed in Muffle furnace by second step, is calcined 30~40 minutes, is obtained under the conditions of 830~850 DEG C
Calcining material.
The water for accounting for 48~50wt% of the calcining material is added into the calcining material for third step, mixes 5~8 minutes, obtains
Mixture.
The hydrofluoric acid solution for accounting for the 3~4wt% of mixture is added into the mixture for 4th step, mixes 8~10 points
Clock is stored 3~5 hours, obtains presoma material under room temperature.
The presoma material is added in Muffle furnace 5th step, is calcined 20~30 minutes under the conditions of 1284~1300 DEG C,
Activity magnesia is made in furnace cooling.
Activity magnesia manufactured in the present embodiment is after testing：Free content of MgO is 98.8~99.0wt%, specific surface area 23
~25m2/g。
Present embodiment has the positive effect that compared with prior art：
1, in present embodiment preparation process only will after magnesite ball milling calcine, mix and secondary clacining, without spy
Different processing equipment and complicated preparation method, preparation process is simple and production cost is low.
2, present embodiment first will be digested after magnesite calcining and activating, cleaned using hydrofluoric acid and introduce Fluorine source, be carried
The purity of high magnesia simultaneously promotes periclase grain crystalline to be nucleated, and improves the reactivity of magnesia, sintering character is excellent.
Active magnesia prepared by present embodiment is after testing：Free content of MgO is 98.5~99.0wt%, compares table
Area is 20~25m2/g。
Therefore, present embodiment has the characteristics that simple for process low with production cost；Prepared active magnesia is pure
Degree is high, reactivity is good and sintering character is excellent.
Claims (3)
1. a kind of preparation method of activity magnesia, it is characterised in that the preparation method comprises the concrete steps that：
Magnisite is added in ball mill the first step, is milled to granularity≤0.1mm, obtains ball milling material；
The ball milling material is placed in Muffle furnace by second step, is calcined 30~40 minutes, is calcined under the conditions of 800~850 DEG C
Material；
The water for accounting for 45~50wt% of the calcining material is added into the calcining material for third step, mixes 5~8 minutes, is mixed
Material；
The hydrofluoric acid solution for accounting for the 3~4wt% of mixture is added into the mixture for 4th step, mixes 8~10 minutes,
It stores 3~5 hours under room temperature, obtains presoma material；
The presoma material is added in Muffle furnace 5th step, is calcined 20~30 minutes under the conditions of 1260~1300 DEG C, with stove
It is cooling, activity magnesia is made.
2. the preparation method of activity magnesia according to claim 1, it is characterised in that mainization of the magnisite
Studying point is：MgCO3Content >=95wt%；SiO2Content≤2wt%.
3. the preparation method of activity magnesia according to claim 1, it is characterised in that the hydrofluoric acid solution is that chemistry is pure；
0.2~0.5mol/L of concentration of the hydrofluoric acid solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810746060.6A CN108793779A (en) | 2018-07-09 | 2018-07-09 | A kind of preparation method of activity magnesia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810746060.6A CN108793779A (en) | 2018-07-09 | 2018-07-09 | A kind of preparation method of activity magnesia |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108793779A true CN108793779A (en) | 2018-11-13 |
Family
ID=64075937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810746060.6A Withdrawn CN108793779A (en) | 2018-07-09 | 2018-07-09 | A kind of preparation method of activity magnesia |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108793779A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111925191A (en) * | 2020-07-13 | 2020-11-13 | 辽宁东和新材料股份有限公司 | Method for producing high-density high-purity sintered magnesia by using low-grade magnesite |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3276882A (en) * | 1961-04-22 | 1966-10-04 | Dolomitwerke Gmbh | Highly hydration stable sinters of dolomite, magnesite, lime or the like |
| CN1057631A (en) * | 1991-06-29 | 1992-01-08 | 叶青柏 | The production method of electro-smelting magnesite with low silicon content |
| CN1792940A (en) * | 2005-11-18 | 2006-06-28 | 东北大学 | Process for prepering active magnesium oxide |
| CN103204641A (en) * | 2012-01-16 | 2013-07-17 | 东北大学 | Purification method for low-grade magnesite via hydration |
| CN106565115A (en) * | 2016-11-17 | 2017-04-19 | 营口镁质材料研究院有限公司 | Method for roguing and purifying low-grade magnesite |
-
2018
- 2018-07-09 CN CN201810746060.6A patent/CN108793779A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3276882A (en) * | 1961-04-22 | 1966-10-04 | Dolomitwerke Gmbh | Highly hydration stable sinters of dolomite, magnesite, lime or the like |
| CN1057631A (en) * | 1991-06-29 | 1992-01-08 | 叶青柏 | The production method of electro-smelting magnesite with low silicon content |
| CN1792940A (en) * | 2005-11-18 | 2006-06-28 | 东北大学 | Process for prepering active magnesium oxide |
| CN103204641A (en) * | 2012-01-16 | 2013-07-17 | 东北大学 | Purification method for low-grade magnesite via hydration |
| CN106565115A (en) * | 2016-11-17 | 2017-04-19 | 营口镁质材料研究院有限公司 | Method for roguing and purifying low-grade magnesite |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111925191A (en) * | 2020-07-13 | 2020-11-13 | 辽宁东和新材料股份有限公司 | Method for producing high-density high-purity sintered magnesia by using low-grade magnesite |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102584045B (en) | Active belite-sulphate aluminum cement clinker and preparation method for active belite-sulphate aluminum cement clinker | |
| CN102107895B (en) | Improved soda lime sintering method for processing aluminum-containing raw material | |
| CN106007742B (en) | A kind of lateritic nickel ore rotary kiln titanium calcium aluminate brick and preparation method thereof | |
| CN105254193B (en) | It is a kind of using discarded object as the cement of raw material and the preparation method of clinker | |
| CN104311151A (en) | Technique for firing spinel-type black ceramic material with tunnel kiln | |
| CN115321898A (en) | High-performance composite mineral admixture and preparation method thereof | |
| CN110372240A (en) | A kind of room temperature conserves the preparation and application of cheap alkali-excited cement | |
| CN104529393A (en) | Method fro producing low-cost high-whiteness sanitary ceramic with clay tailings | |
| CN108793779A (en) | A kind of preparation method of activity magnesia | |
| CN103708732A (en) | Method for preparing microcrystalline glass from steel slag | |
| EP1847515B1 (en) | Cement clinker and process for producing the same | |
| CN101671184A (en) | Formula of high-aluminum bricks sintered at low temperature and production method thereof | |
| CN104387096A (en) | Corundum spinel unburned brick for smelting steel ladle and preparation method of corundum spinel unburned brick | |
| JP2010120787A (en) | Method for manufacturing low-heat portland cement | |
| CN100420646C (en) | Smelting method of low silicon high calcium single crystal electric melting magnesite clinker | |
| JP2018002547A (en) | Manufacturing method of calcium aluminate | |
| JP5971311B2 (en) | Clinker composition, cement composition and manufacturing method thereof | |
| JP2007008785A (en) | Cement clinker and its manufacturing method | |
| CN110183124B (en) | Micro-expansion sulphoaluminate cement clinker and preparation method thereof | |
| JP4336793B2 (en) | Method for producing hydraulic material and hydraulic building material | |
| CN115849740B (en) | Dicalcium silicate-calcium sulfoaluminate-calcium sulfosilicate cement clinker and preparation process thereof | |
| KR20120110899A (en) | Method for manufacturing of heat resistant cement | |
| CN108752018A (en) | A kind of titanium calcium aluminate-aluminium titanates complex phase ceramic and preparation method thereof | |
| KR100559506B1 (en) | Process of producing alumina cement clinker using refined slag | |
| JPH0781995A (en) | Cement composition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181113 |