CN109553311A - A method of high density magnesia is prepared using magnesite microwave sintering - Google Patents
A method of high density magnesia is prepared using magnesite microwave sintering Download PDFInfo
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- CN109553311A CN109553311A CN201910107678.2A CN201910107678A CN109553311A CN 109553311 A CN109553311 A CN 109553311A CN 201910107678 A CN201910107678 A CN 201910107678A CN 109553311 A CN109553311 A CN 109553311A
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- magnesite
- high density
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- 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
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- 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
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- Organic Chemistry (AREA)
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- Compositions Of Oxide Ceramics (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
A kind of method using magnesite microwave sintering preparation high density magnesia of the invention, belongs to Metallurgical resources efficient technique of rainwater utilization field.It is specifically calcined the preparation method comprises the following steps: magnesite is placed in high temperature furnace, obtains a light-magnesite powder；Light-magnesite powder is placed in ball grinder, using deionized water as ball-milling medium, while aquation and ball-milling treatment is completed to light calcined magnesia, by being dried, obtains magnesium hydroxide powder；Magnesium hydroxide powder is placed in secondary clacining in high temperature furnace, obtains secondary light-magnesite powder；Biscuit is made in the molding of secondary light-magnesite powder, microwave sintering is carried out under certain temperature, time, high density magnesia is made.The method achieve the high-efficiency resource recyclings of magnesite, considerably reduce production cost, improve production efficiency, and operation is simple, are convenient for industrialized production.
Description
Technical field:
The invention belongs to Metallurgical resources efficient technique of rainwater utilization fields, and in particular to a kind of to be prepared using magnesite microwave sintering
The method of high density magnesia.
Background technique:
It is higher and higher to the quality requirement of refractory material with the development of smelting iron and steel science and technology.Currently, clean steel smelting
Gold refractory material mainly includes MgO-CaO refractory and Low-carbon magnesia-carbon refractory material.Magnesia group in both refractory materials
Dividing has the characteristics that fusing point high (2800 DEG C), resistance to slag corrosion are good, meanwhile, the bulk density of magnesia (or magnesia) is for fire resisting
The resistance to slag corrosion and elevated temperature strength of material product have important influence.Therefore.The density for improving magnesia is magnesia to high-performance
The exploitation of refractory material and long service life all have important meaning.
Currently, it is raw material mass production that magnesia, which mainly utilizes magnesite, brine,.Wherein, the magnesite ore reserves in China, production
Amount, export volume occupy first place in the world.Therefore, magnesite resource abundant provides the guarantor of strength for preparation high density magnesia
Barrier.
Summary of the invention:
The purpose of the present invention is overcoming above-mentioned the shortcomings of the prior art, a kind of utilization magnesite microwave sintering system is provided
The method of standby high density magnesia.The master operation of this method is as follows: calcining firstly, magnesite is placed in high temperature furnace, obtains one
Secondary light-magnesite powder；Secondly, a light-magnesite powder is placed in ball grinder, using deionized water as ball-milling medium, simultaneously
Aquation and ball-milling treatment are completed to light calcined magnesia, by being dried, obtain magnesium hydroxide powder；Then, by magnesium hydroxide powder
It is placed in secondary clacining in high temperature furnace, then obtains secondary light-magnesite powder；Finally, element is made in the molding of secondary light-magnesite powder
Base carries out microwave sintering under certain temperature, time, and high density magnesia is made.
To achieve the above object, the invention adopts the following technical scheme:
A method of high density magnesia being prepared using magnesite microwave sintering, is sequentially included the following steps:
Step 1: primary light-burned
Magnesite is placed in high temperature furnace and is calcined, a light-magnesite powder is obtained；
Step 2: aquation+wet-milling+drying
(1) light-magnesite powder and deionized water are placed in ball grinder and carry out wet-milling, with 200~300rmin-1
Revolving speed 10~15h of unidirectional operation is completed at the same time aquation and wet ground, forms slurry after ball milling；
(2) slurry after ball milling is dry, obtain magnesium hydroxide powder；
Step 3: secondary light-burned
Magnesium hydroxide powder is subjected to secondary clacining, obtains secondary light-magnesite powder；
Step 4: microwave sintering
(1) secondary light-magnesite powder is press-formed, obtains biscuit；
(2) it after sufficiently drying biscuit after molding, is placed in microwave agglomerating furnace, is sintered and keeps the temperature in air atmosphere,
High density magnesia is made, wherein the sintering temperature is 1350~1500 DEG C, and the sintered heat insulating time is 1~3h.
In the step 1, the high temperature furnace is one of shaft furnace, fluidized bed furnace, shower furnace；Calcination temperature is 800 DEG C
~900 DEG C, calcination time is 2~4h.
In the step 2 (1), the deionized water is with a light-magnesite powder by liquid product and solid masses ratio
For (3~4): 1, units/ml: g；The ball milling uses vacuum ball grinder and ZrO2Abrading-ball.
In the step 2 (2), drying temperature is 100~120 DEG C, drying time 20~for 24 hours.
In the step 3, secondary clacining operation carries out in high temperature furnace, and the secondary light-magnesite powder is than primary
Light calcined magnesia Powder Particle Size is thinner.
In the step 3, the high temperature furnace is one of shaft furnace, fluidized bed furnace, shower furnace；Calcination temperature be 750~
850 DEG C, calcination time is 2~4h.
In the step 4 (1), the briquetting pressure is 100~300MPa.
In the step 4 (2), biscuit drying temperature is 100~120 DEG C.
In the step 4 (2), content of magnesia is greater than 97.5% in the high density magnesia of preparation.
In the step 4 (2), through detecting, the bulk density of the high density magnesia of preparation is 3.5~3.56gcm-3。
Beneficial effects of the present invention:
1. the method for the invention using magnesite microwave sintering preparation high density magnesia improves the utilization rate of magnesite,
Cost has not only been saved, but also the magnesia of high added value is made.
2. operation is simple for the method for the invention using magnesite microwave sintering preparation high density magnesia, convenient for industry
Metaplasia produces.
3. the method for the invention using magnesite microwave sintering preparation high density magnesia, by the way of microwave sintering,
It is rapidly heated, sintering temperature is low, safety non-pollution, saves the time and greatly improves preparation efficiency, readily available highdensity magnesium
Sand.
Detailed description of the invention:
Fig. 1 is the method and process flow chart of the invention using magnesite microwave sintering preparation high density magnesia.
Specific embodiment:
Below with reference to embodiment, the present invention is described in further detail.
The main component of the magnesite used in following embodiment is MgCO3, mass percent 47%MgO, 52%
CO2, the oxide impurity of surplus Si, Ca, Fe, Al.
Embodiment 1
A method of using magnesite microwave sintering prepare high density magnesia, process flow chart as shown in Figure 1, by with
Lower step carries out:
Step 1: primary light-burned
Magnesite is placed in 900 DEG C of shower furnaces and calcines 2h, obtains a light-magnesite powder；
Step 2: aquation+wet-milling+drying
(1) light-magnesite powder of 1000g and 3 times of volume fractions, the i.e. deionized water of 3000ml are placed in ball milling
In tank, with 200rmin-1Revolving speed unidirectional operation 10h, is completed at the same time aquation and wet ground；
(2) by slurry after ball milling, drying for 24 hours, obtains magnesium hydroxide powder at 100 DEG C；
Step 3: secondary light-burned
The magnesium hydroxide powder of acquisition is placed in 750 DEG C of shower furnaces and calcines 4h, obtains secondary light-magnesite powder.
Step 4: microwave sintering
(1) by secondary light-magnesite powder 100MPa forming under the pressure；
(2) biscuit after molding is sufficiently dry at a temperature of 100 DEG C, then be placed in microwave agglomerating furnace, under air atmosphere
It is sintered and is kept the temperature 2h with 1400 DEG C, high density magnesia is made.
Through detecting, the bulk density of gained magnesia is 3.5gcm-3, content of magnesia is greater than 97.5%, and oxygen in magnesia
It is good to change magnesium grain development.
Embodiment 2
A method of high density magnesia being prepared using magnesite microwave sintering, is sequentially included the following steps:
Step 1: primary light-burned
Magnesite is placed in 850 DEG C of shaft furnaces and calcines 4h, obtains a light-magnesite powder；
Step 2: aquation+wet-milling+drying
(1) light-magnesite powder of 1000g and 4 times of volume fractions, the i.e. deionized water of 4000ml are placed in ball milling
In tank, with 200rmin-1Revolving speed unidirectional operation 15h, is completed at the same time aquation and wet ground；
(2) slurry after ball milling is dried to 20h at 120 DEG C, obtains magnesium hydroxide powder；
Step 3: secondary light-burned
The magnesium hydroxide powder of acquisition is placed in 800 DEG C of shaft furnaces and calcines 3h, obtains secondary light-magnesite powder.
Step 4: microwave sintering
(1) by secondary light-magnesite powder 200MPa forming under the pressure；
(2) biscuit after molding is sufficiently dry at a temperature of 120 DEG C, then be placed in microwave agglomerating furnace, under air atmosphere
It is sintered and is kept the temperature 3h with 1400 DEG C, high density magnesia is made.
Through detecting, the bulk density of gained magnesia is 3.52gcm-3, content of magnesia is greater than 97.5%, and oxygen in magnesia
It is good to change magnesium grain development.
Embodiment 3
A method of high density magnesia being prepared using magnesite microwave sintering, is sequentially included the following steps:
Step 1: primary light-burned
Magnesite is placed in 800 DEG C of fluidized bed furnaces and calcines 4h, obtains a light-magnesite powder；
Step 2: aquation+wet-milling+drying
(1) by the light-magnesite powder of 1000g and 3 times of volume fractions, i.e. the deionized water of 3000ml is placed in ball grinder,
With 300rmin-1Revolving speed unidirectional operation 10h, is completed at the same time aquation and wet ground；
(2) by slurry after ball milling, drying for 24 hours, obtains magnesium hydroxide powder at 120 DEG C；
Step 3: secondary light-burned
The magnesium hydroxide powder of acquisition is placed in 800 DEG C of fluidized bed furnaces and calcines 4h, obtains secondary light-magnesite powder.
Step 4: microwave sintering
(1) by secondary light-magnesite powder 200MPa forming under the pressure；
(2) biscuit after molding is sufficiently dry at a temperature of 120 DEG C, then be placed in microwave agglomerating furnace, under air atmosphere
It is sintered and is kept the temperature 6h with 1450 DEG C, high density magnesia is made.
Through detecting, the bulk density of gained magnesia is 3.55gcm-3, content of magnesia is greater than 97.5%, and oxygen in magnesia
It is good to change magnesium grain development.
Embodiment 4
A method of high density magnesia being prepared using magnesite microwave sintering, is sequentially included the following steps:
Step 1: primary light-burned
Magnesite is placed in 850 DEG C of fluidized bed furnaces and calcines 3h, obtains a light-magnesite powder；
Step 2: aquation+wet-milling+drying
(1) by the light-magnesite powder of 1000g and 4 times of volume fractions, i.e. the deionized water of 4000ml is placed in ball grinder,
With 300rmin-1Revolving speed unidirectional operation 15h, is completed at the same time aquation and wet ground；
(2) by slurry after ball milling, drying for 24 hours, obtains magnesium hydroxide powder at 120 DEG C；
Step 3: secondary light-burned
The magnesium hydroxide powder of acquisition is placed in 850 DEG C of fluidized bed furnaces and calcines 3h, obtains secondary light calcined magnesia fine powder.
Step 4: microwave sintering
(1) by secondary light calcined magnesia fine powder 300MPa forming under the pressure；
(2) biscuit after molding is sufficiently dry at a temperature of 120 DEG C, then be placed in microwave agglomerating furnace, under air atmosphere
It is sintered and is kept the temperature 4h with 1450 DEG C, high density magnesia is made.
Through detecting, the bulk density of gained magnesia is 3.55gcm-3, content of magnesia is greater than 97.5%, and oxygen in magnesia
It is good to change magnesium grain development.
Embodiment 5
A method of high density magnesia being prepared using magnesite microwave sintering, is sequentially included the following steps:
Step 1: primary light-burned
Magnesite is placed in 850 DEG C of shaft furnaces and calcines 4h, obtains a light-magnesite powder；
Step 2: aquation+wet-milling+drying
(1) by the light-magnesite powder of 1000g and 4 times of volume fractions, i.e. the deionized water of 4000ml is placed in ball grinder,
With 300rmin-1Revolving speed unidirectional operation 12h, is completed at the same time aquation and wet ground；
(2) by slurry after ball milling, drying for 24 hours, obtains magnesium hydroxide powder at 120 DEG C；
Step 3: secondary light-burned
The magnesium hydroxide powder of acquisition is placed in 850 DEG C of shaft furnaces and calcines 2h, obtains secondary light calcined magnesia fine powder.
Step 4: microwave sintering
(1) by secondary light calcined magnesia fine powder 300MPa forming under the pressure；
(2) biscuit after molding is sufficiently dry at a temperature of 120 DEG C, then be placed in microwave agglomerating furnace, under air atmosphere
It is sintered and is kept the temperature 6h with 1500 DEG C, high density magnesia is made.
Through detecting, the bulk density of gained magnesia is 3.56gcm-3, content of magnesia is greater than 97.5%, and oxygen in magnesia
It is good to change magnesium grain development.
Claims (8)
1. a kind of method using magnesite microwave sintering preparation high density magnesia, which is characterized in that sequentially include the following steps:
Step 1: primary light-burned
Magnesite is placed in high temperature furnace and is calcined, a light-magnesite powder is obtained；
Step 2: aquation+wet-milling+drying
(1) light-magnesite powder and deionized water are placed in ball grinder and carry out wet-milling, with 200~300rmin-1Revolving speed
10~15h of unidirectional operation is completed at the same time aquation and wet ground, forms slurry after ball milling；
(2) slurry after ball milling is dry, obtain magnesium hydroxide powder；
Step 3: secondary light-burned
Magnesium hydroxide powder is subjected to secondary clacining, obtains secondary light-magnesite powder；
Step 4: microwave sintering
(1) secondary light-magnesite powder is press-formed, obtains biscuit；
(2) it after sufficiently drying biscuit after molding, is placed in microwave agglomerating furnace, is sintered and keeps the temperature in air atmosphere, be made
High density magnesia, wherein the sintering temperature is 1350~1500 DEG C, and the sintered heat insulating time is 1~3h.
2. a kind of method using magnesite microwave sintering preparation high density magnesia according to claim 1, feature exist
In in the step 1, the high temperature furnace is one of shaft furnace, fluidized bed furnace, shower furnace；Calcination temperature is 800 DEG C~900
DEG C, calcination time is 2~4h.
3. a kind of method using magnesite microwave sintering preparation high density magnesia according to claim 1, feature exist
In in the step 2 (1), the deionized water is (3 by liquid product and solid masses ratio with a light-magnesite powder
~4): 1 addition, units/ml: g；The ball milling uses vacuum ball grinder and ZrO2Abrading-ball.
4. a kind of method using magnesite microwave sintering preparation high density magnesia according to claim 1, feature exist
In, in the step 2 (2), drying temperature is 100~120 DEG C, drying time 20~for 24 hours.
5. a kind of method using magnesite microwave sintering preparation high density magnesia according to claim 1, feature exist
In in the step 3, secondary clacining temperature is 750~850 DEG C, and calcination time is 2~4h.
6. a kind of method using magnesite microwave sintering preparation high density magnesia according to claim 1, feature exist
In in the step 4 (1), the briquetting pressure is 100~300MPa.
7. a kind of method using magnesite microwave sintering preparation high density magnesia according to claim 1, feature exist
In in the step 4 (2), content of magnesia is greater than 97.5% in the high density magnesia of preparation.
8. a kind of method using magnesite microwave sintering preparation high density magnesia according to claim 1, feature exist
In in the step 4 (2), through detecting, the bulk density of the high density magnesia of preparation is 3.5~3.56gcm-3。
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| CN201910107678.2A CN109553311B (en) | 2019-02-01 | 2019-02-01 | Method for preparing high-density magnesite by magnesite microwave sintering |
| PCT/CN2019/076095 WO2020155244A1 (en) | 2019-02-01 | 2019-02-26 | Method for preparing high-density magnesia by using microwave sintering of magnesite |
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| CN201910107678.2A CN109553311B (en) | 2019-02-01 | 2019-02-01 | Method for preparing high-density magnesite by magnesite microwave sintering |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111072049A (en) * | 2019-12-28 | 2020-04-28 | 海城市中昊镁业有限公司 | Preparation method of high-density medium-grade sintered magnesia |
| CN113548874A (en) * | 2021-09-03 | 2021-10-26 | 辽宁荣邦科技有限公司 | Method and device for producing fused magnesia by magnesite through microwave/electric arc heating |
| CN118637893A (en) * | 2024-08-15 | 2024-09-13 | 营口新型硅制品有限公司 | Preparation method of light-burned magnesium oxide composite refractory material |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115572080B (en) * | 2022-11-09 | 2024-01-16 | 营口菱镁化工集团有限公司 | Preparation method of feed-grade magnesium oxide |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1709827A (en) * | 2005-07-06 | 2005-12-21 | 东北大学 | Sintered magnesium sand preparing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1070156C (en) * | 1996-09-05 | 2001-08-29 | 辽宁镁矿耐火材料公司 | Method for producing high-purity dense macrocrystalline sintered magnesia |
| KR100890626B1 (en) * | 2008-08-29 | 2009-03-27 | (주)원진월드와이드 | Refractory repairing material for equipment of iron/steel making, method for preparing thereof and composition comprising the same |
| CN102351441A (en) * | 2011-07-21 | 2012-02-15 | 辽宁科技大学 | Method for producing dead-burned magnesia through one-step calcination of magnesite tailings |
| CN103204641A (en) * | 2012-01-16 | 2013-07-17 | 东北大学 | Purification method for low-grade magnesite via hydration |
| CN108046620B (en) * | 2017-12-08 | 2019-10-22 | 中南大学 | A method of it is prepared by magnesite light burnt powder containing chrome-magnesite |
| CN109053159A (en) * | 2018-09-03 | 2018-12-21 | 东北大学 | A method of cooperate with processing magnesite to prepare high density magnesium zirconia block using microwave outfield |
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2019
- 2019-02-01 CN CN201910107678.2A patent/CN109553311B/en active Active
- 2019-02-26 WO PCT/CN2019/076095 patent/WO2020155244A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1709827A (en) * | 2005-07-06 | 2005-12-21 | 东北大学 | Sintered magnesium sand preparing method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111072049A (en) * | 2019-12-28 | 2020-04-28 | 海城市中昊镁业有限公司 | Preparation method of high-density medium-grade sintered magnesia |
| CN111072049B (en) * | 2019-12-28 | 2022-09-27 | 海城市中昊镁业有限公司 | Preparation method of high-density medium-grade sintered magnesia |
| CN113548874A (en) * | 2021-09-03 | 2021-10-26 | 辽宁荣邦科技有限公司 | Method and device for producing fused magnesia by magnesite through microwave/electric arc heating |
| CN113548874B (en) * | 2021-09-03 | 2024-07-19 | 辽宁荣邦科技有限公司 | Method and device for co-production of fused magnesia by using magnesite microwave/electric arc heating |
| CN118637893A (en) * | 2024-08-15 | 2024-09-13 | 营口新型硅制品有限公司 | Preparation method of light-burned magnesium oxide composite refractory material |
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| CN109553311B (en) | 2020-09-01 |
| WO2020155244A1 (en) | 2020-08-06 |
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