CN1286231A - High-purity magnesite with volume density higher than 3.40 g/cu.cm prepared from magnesite and its preparing process - Google Patents
High-purity magnesite with volume density higher than 3.40 g/cu.cm prepared from magnesite and its preparing process Download PDFInfo
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- CN1286231A CN1286231A CN 99113210 CN99113210A CN1286231A CN 1286231 A CN1286231 A CN 1286231A CN 99113210 CN99113210 CN 99113210 CN 99113210 A CN99113210 A CN 99113210A CN 1286231 A CN1286231 A CN 1286231A
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- magnesite
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Abstract
A high-purity magnesite with volume density greater than 3.40 g/cu.cm is prepared from magnesite through charging magnesite in boiling furnace at 950 deg.C to obtain activated magnesium oxide power, mixing it with anionic activator and mineralizing agent, grinding, spherizing and calcining in vertical oil kiln.
Description
The present invention relates to magnisite (MT
A) the purification techniques field, the particularly volume density 〉=3.40g/cm that makes by magnesite
3Highly-purity magnesite and production method.
At present, the reserves of magnesite, China occupies more than 85% in whole world distribution, is the mining deposits that is of great value.Highly-purity magnesite is one of important source material of high grade refractory, is lacking the country of magnesite, uses a large amount of funds high-purity magnesium of purifying from seawater to remedy the shortage of these natural resource, and the small product size density of purification can reach 3.40g/cm
3More than, the refractory materials that highdensity magnesia is made can effectively improve intensity, the erosion resistance of refractory materials, the life-span of improving metallurgical furnace.By the highly-purity magnesite that magnisite is purified, volume density rests on 3.30g/cm always
3Level on, do not reach 3.40g/cm
3World level.Its major cause is: the activation degree of light-burning magnesium powder is poor, and the volume density of molding blank and autoactivation degree are not enough, and the high temperature oil shaft furnace does not reach the ideal calcination temperature.
The objective of the invention is, by in light-burning magnesium powder and molding blank, adding anion active agent and mineralizer, improve the calcination temperature of oily shaft furnace, and a kind of volume density＞3.40g/cm that is made by magnesite is provided
3Highly-purity magnesite and processing method.
Technical scheme of the present invention is finished like this:
A kind of volume density＞3.40g/cm that manufactures by magnisite
3Highly-purity magnesite, it is characterized in that: described group of products becomes MgO 〉=98%, SiO
2≤ 0.5%, CaO≤1.0%, igloss IgL≤0.12%, above unit all are weight percents, volume density B.D 〉=3.40g/cm
3
Volume density＞3.40g/cm by the magnisite manufacturing
3The producing and manufacturing technique of highly-purity magnesite, it is characterized in that: with superfine magnesite MT
AMgO＞47.5% wherein, place fluidizing furnace, temperature is that temperature is 870 ℃ and carries out roasting in 950 ℃ or the shower furnace, obtain the activated magnesia powder, with this activated magnesia powder, carry out super fine powder with airflow milling, obtain the higher magnesia powder of activation degree, magnesia powder anion active agent after the activation and mineralizer are mixed mill altogether, obtain the preceding activated magnesia powder of base, with the balling-up of high pressure ball press, obtaining density is 2.05-2.10g/cm
3The pelletizing base substrate, place calcining in the high temperature oil shaft furnace then, temperature is 1950-2000 ℃, obtains MgO 〉=98%, SiO
2≤ 0.5%, CaO≤1.0%, igloss IgL≤0.1 2%, above unit all is weight percents, volume density B.D 〉=3.40g/cm
3High purity, highdensity highly-purity magnesite.Above-mentioned anion active agent is a haloid element, as: magnesium chloride Mg Cl
2Add-on is 0-5%; Mineralizer is a nonmetal oxide, as: boron oxide BO add-on is 0-2%.
Characteristics of the present invention are: this product makes magnisite make volume density greater than 3.40g/cm
3Product become possibility, step on a new stage to high purity, high-density, high precision development by the fire resistive material product of this products production.The advantage of this technology is the light-burning magnesium powder that utilizes after the activation, has added anion active agent and mineralizer grinds altogether, makes mixing more even, during calcining reaction more abundant, thereby obtain highdensity highly-purity magnesite.
Fig. 1 is for making volume density 〉=3.40g/cm
3The process flow sheet of highly-purity magnesite.
Embodiment 1
Volume density＞3.40g/cm by the magnisite manufacturing
3The producing and manufacturing technique (see figure 1) of highly-purity magnesite, with superfine magnesite MT
AWherein MgO＞47.5% places fluidizing furnace, and temperature is 950 ℃, with this activated magnesia powder, carries out super fine powder with airflow milling, obtains the higher magnesia powder of activation degree, with the magnesia powder anion active agent magnesium chloride Mg Cl after the activation
21% and mineralizer boron oxide BO2%, mix mill altogether, obtain the activated magnesia powder before the base, with the balling-up of high pressure ball press, obtaining density is 2.05-2.10g/cm
3The pelletizing base substrate, place calcining in the high temperature oil shaft furnace then, temperature is 1950-2000 ℃, obtains MgO 〉=98%, SiO
2≤ 0.5%, CaO≤1.0%, igloss IgL≤0.12%, above unit all are weight percents, volume density B.D 〉=3.40g/cm
3High purity, highdensity highly-purity magnesite.
Embodiment 2
Add anion active agent magnesium chloride Mg Cl
23% and mineralizer boron oxide BO1.5% mix mill altogether.All the other are with embodiment 1.
Embodiment 3
Add anion active agent magnesium chloride Mg Cl
25% and mineralizer boron oxide BO1% mix mill altogether.All the other are with embodiment 1.
Embodiment 4
With superfine magnesite MT
AWherein MgO＞47.5% places shower furnace, and temperature is 870 ℃ and carries out roasting, obtains the activated magnesia powder.All the other are with embodiment 1.
Claims (4)
1. volume density 〉=3.40g/cm who makes by magnesite
3Highly-purity magnesite, it is characterized in that: described group of products becomes MgO 〉=98%, SiO
2≤ 0.5%, CaO≤1.0%, igloss IgL≤0.12%, above unit all are weight percents, volume density B.D 〉=8.40g/cm
3
2. the production method of the described product of claim 1 is characterized in that: with superfine magnesite MT
AMgO＞47.5% wherein, place fluidizing furnace, temperature is that temperature is 870 ℃ and carries out roasting in 950 ℃ or the shower furnace, obtain the activated magnesia powder, with this activated magnesia powder, carry out super fine powder with airflow milling, obtain the higher magnesia powder of activation degree, magnesia powder anion active agent after the activation and mineralizer are mixed mill altogether, obtain the preceding activated magnesia powder of base, with the balling-up of high pressure ball press, obtaining density is 2.05-2.10g/cm
3The pelletizing base substrate, place calcining in the high temperature oil shaft furnace then, temperature is 1950-2000 ℃, obtains MgO 〉=98%, SiO
2≤ 0.5%, CaO≤1.0%, igloss IgL≤0.12%, above unit all are weight percents, volume density B.D 〉=3.40g/cm
3High purity, highdensity highly-purity magnesite.
3. the production method of product according to claim 2, it is characterized in that: anion active agent is a haloid element.
4. the production method of product according to claim 2, it is characterized in that: mineralizer is a nonmetal oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99113210 CN1114567C (en) | 1999-08-30 | 1999-08-30 | High-purity magnesite with volume density higher than 3.40 g/cu.cm prepared from magnesite and its preparing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99113210 CN1114567C (en) | 1999-08-30 | 1999-08-30 | High-purity magnesite with volume density higher than 3.40 g/cu.cm prepared from magnesite and its preparing process |
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| Publication Number | Publication Date |
|---|---|
| CN1286231A true CN1286231A (en) | 2001-03-07 |
| CN1114567C CN1114567C (en) | 2003-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 99113210 Expired - Fee Related CN1114567C (en) | 1999-08-30 | 1999-08-30 | High-purity magnesite with volume density higher than 3.40 g/cu.cm prepared from magnesite and its preparing process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100341815C (en) * | 2002-06-21 | 2007-10-10 | 董波 | Smelting technique of high-purity electrosmelted magnesite clinker |
| CN102190449A (en) * | 2010-03-16 | 2011-09-21 | 沈阳铝镁设计研究院有限公司 | Light burning system and method of magnesite |
| CN107352940A (en) * | 2016-05-09 | 2017-11-17 | 华东理工大学 | A kind of magnesia pelletizing and preparation method thereof |
| CN107857489A (en) * | 2017-12-15 | 2018-03-30 | 宋重本 | Magnesite calcination for activation gravity treatment silicon removing process |
| 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 |
| 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 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100335435C (en) * | 2006-03-16 | 2007-09-05 | 杨庆广 | Process for producing high quality high purity magnesite by two-step calcining natural cryptocrystalline magnesite |
-
1999
- 1999-08-30 CN CN 99113210 patent/CN1114567C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100341815C (en) * | 2002-06-21 | 2007-10-10 | 董波 | Smelting technique of high-purity electrosmelted magnesite clinker |
| CN102190449A (en) * | 2010-03-16 | 2011-09-21 | 沈阳铝镁设计研究院有限公司 | Light burning system and method of magnesite |
| CN102190449B (en) * | 2010-03-16 | 2013-01-23 | 沈阳铝镁设计研究院有限公司 | Light burning system and method of magnesite |
| CN107352940A (en) * | 2016-05-09 | 2017-11-17 | 华东理工大学 | A kind of magnesia pelletizing and preparation method thereof |
| CN107857489A (en) * | 2017-12-15 | 2018-03-30 | 宋重本 | Magnesite calcination for activation gravity treatment silicon removing process |
| CN107857489B (en) * | 2017-12-15 | 2020-06-02 | 宋重本 | Process for removing silicon by activating, roasting and gravity separation of 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 |
| 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 |
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|---|---|
| CN1114567C (en) | 2003-07-16 |
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