CN107555962A - A kind of fused magnesite and its preparation technology - Google Patents
A kind of fused magnesite and its preparation technology Download PDFInfo
- Publication number
- CN107555962A CN107555962A CN201710844005.6A CN201710844005A CN107555962A CN 107555962 A CN107555962 A CN 107555962A CN 201710844005 A CN201710844005 A CN 201710844005A CN 107555962 A CN107555962 A CN 107555962A
- Authority
- CN
- China
- Prior art keywords
- magnesite
- fused magnesite
- stage
- smelt
- flue gas
- 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.)
- Pending
Links
- 239000001095 magnesium carbonate Substances 0.000 title claims abstract description 32
- 235000014380 magnesium carbonate Nutrition 0.000 title claims abstract description 32
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 title claims abstract description 32
- 229910000021 magnesium carbonate Inorganic materials 0.000 title claims abstract description 32
- 238000005516 engineering process Methods 0.000 title claims abstract description 11
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000003723 Smelting Methods 0.000 claims abstract description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003546 flue gas Substances 0.000 claims abstract description 10
- 238000011084 recovery Methods 0.000 claims abstract description 10
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 8
- 239000010459 dolomite Substances 0.000 claims abstract description 7
- 229910000514 dolomite Inorganic materials 0.000 claims abstract description 7
- 239000000428 dust Substances 0.000 claims abstract description 6
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 5
- 239000003517 fume Substances 0.000 claims abstract description 5
- 238000007499 fusion processing Methods 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 241001062472 Stokellia anisodon Species 0.000 claims description 14
- 239000000395 magnesium oxide Substances 0.000 claims description 9
- 239000000292 calcium oxide Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 239000007770 graphite material Substances 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 235000010755 mineral Nutrition 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 229910052681 coesite Inorganic materials 0.000 claims description 2
- 229910052593 corundum Inorganic materials 0.000 claims description 2
- 229910052906 cristobalite Inorganic materials 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 229910052682 stishovite Inorganic materials 0.000 claims description 2
- 229910052905 tridymite Inorganic materials 0.000 claims description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- 239000011575 calcium Substances 0.000 abstract description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052791 calcium Inorganic materials 0.000 abstract description 3
- 230000007812 deficiency Effects 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 abstract 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 16
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention proposes a kind of fused magnesite and its preparation technology, solve the problems, such as that it is low in turn result in calcium content for traditional fused magnesite preparation technology design deficiency in the prior art, a kind of fused magnesite, include magnesite, dolomite raw material, and the weight of the two is than 5.3: 1, when smelting electricsmelting high-Ca magnesite, closing mode is capped using fire door, make caused flue gas in fusion process, concentration enters fume recovery system, enters middle warehouse after flue gas removing dust, is finally introducing carbon dioxide recovery system, in accordance, reduce environmental pollution, save the energy.
Description
Technical field
The present invention relates to smelting industry technical field, particularly relates to a kind of fused magnesite and its preparation technology.
Background technology
Traditional fused magnesite is that a kind of purity is high, fusing point is high, crystal grain is big, structure mainly using magnesia as Main Ingredients and Appearance
It is fine and close, resistance to slag is strong, the alkaline magnesia refractories of stable chemical performance, be widely used in making high-grade magnesia brick, magnesia carbon brick
And unshape refractory.
Traditional fused magnesite is wrapped with good using effect by its excellent performance in ordinary steel, and clean refining
Shortcomings on the ladle of net steel, such as traditional fused magnesite calcium oxide content are relatively low, it is impossible to effectively absorb the impurity in molten steel, no
Beneficial to the smelting of clean steel.And traditional fused magnesite opens wide smelting mode, caused by production process when smelting using fire door
Waste gas is directly discharged into air, and waste gas takes away heat, dust and CO2, not only pollutes environment but also causes the waste of the energy and resource.
Thus, developing the smelting and the saving energy of electricsmelting high-Ca magnesite of new generation and its preparation technology to clean steel has weight
Want meaning.
The content of the invention
The present invention proposes a kind of fused magnesite and its preparation technology, solves traditional fused magnesite in the prior art and prepares work
Skill design deficiency in turn results in the problem of calcium content is low.
The technical proposal of the invention is realized in this way：A kind of fused magnesite, comprising magnesite, dolomite raw material, and two
The weight of person is than 5.3: 1.
Preferably, fused magnesite includes MgO >=87.5%, CaO 9~10%, SiO2≤ 1.0%, Fe2O3≤ 0.8%,
Al2O3≤ 0.2%, bulk density is more than 3.35g/cm3。
The present invention proposes a kind of preparation technology of fused magnesite again, comprises the steps of：
1) the blow-on stage：High with ore charge shop fixtures 410mm, electrode declines, and finds electrode nest, and three are connected with fritter graphite material
Electrode nest, decline electrode, add 790mm thickness magnesite and dolomite mineral block, voltage 120V, smelt 3h, form blow-on behind molten bath
Terminate；
2) smelt stage：After molten bath is formed, 150~160V of voltage, into the smelting stage is stablized, cover bell, bell with
Body of heater is rotated simultaneously, and stable smelt is more than 10h, and smelt stage terminates, and this process is made in fusion process using capping closing mode
Caused flue gas, concentration enter fume recovery system, enter middle warehouse after flue gas removing dust, be finally introducing carbon dioxide recovery
System；
3) the blowing out stage：Voltage is maintained at 120~130V, and into finishing phase is smelted, body of heater continues to rotate through 2h or so,
Smelt stage terminates.
Beneficial effects of the present invention：
When smelting electricsmelting high-Ca magnesite, closing mode is capped using fire door, makes caused flue gas in fusion process, is concentrated
Into fume recovery system, middle warehouse is entered after flue gas removing dust, is finally introducing carbon dioxide recovery system, in accordance, it is dirty to reduce environment
Dye, save the energy.
Embodiment
The technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example only part of the embodiment of the present invention, rather than whole embodiments.It is common based on the embodiment in the present invention, this area
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belong to the model that the present invention protects
Enclose.
Electric smelting high calcium magnesia primary raw material is magnesite and dolomite block, and the two is added with 5.3: 1 ratio, in submerged arc
2610~2800 DEG C of stove back warp is smelted, forms the high calcium oxide crystal of a kind of high temperature resistant, purity in magnesia after fusing recrystallization
Equally distributed electricsmelting high-Ca magnesite in crystal.Reaction equation is：MgCO3=MgO+CO2；CaO3=CaO+CO2.
A kind of preparation technology of fused magnesite, it is characterised in that comprise the steps of：
1) the blow-on stage：High with ore charge shop fixtures 410mm, electrode declines, and finds electrode nest, and three are connected with fritter graphite material
Electrode nest, decline electrode, add 790mm thickness magnesite and dolomite mineral block, voltage 120V, smelt 3h, form blow-on behind molten bath
Terminate；
2) smelt stage：After molten bath is formed, 150~160V of voltage, into the smelting stage is stablized, cover bell, bell with
Body of heater is rotated simultaneously, and stable smelt is more than 10h, and smelt stage terminates, and this process is made in fusion process using capping closing mode
Caused flue gas, concentration enter fume recovery system, enter middle warehouse after flue gas removing dust, be finally introducing carbon dioxide recovery
System；
3) the blowing out stage：Voltage is maintained at 120~130V, and into finishing phase is smelted, body of heater continues to rotate through 2h or so,
Smelt stage terminates.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (3)
1. a kind of fused magnesite, it is characterised in that comprising magnesite, dolomite raw material, and the weight of the two than 5.3: 1.
A kind of 2. fused magnesite, it is characterised in that：Fused magnesite includes MgO >=87.5%, CaO 9~10%, SiO2≤ 1.0%,
Fe2O3≤ 0.8%, Al2O3≤ 0.2%, bulk density is more than 3.35g/cm3。
3. a kind of preparation technology of fused magnesite as claimed in claim 1 or 2, it is characterised in that comprise the steps of：
1) the blow-on stage：High with ore charge shop fixtures 410mm, electrode declines, and finds electrode nest, and three electrodes are connected with fritter graphite material
Nest, decline electrode, add 790mm thickness magnesite and dolomite mineral block, voltage 120V, smelt 3h, after forming molten bath blow-on terminate；
2) smelt stage：After molten bath is formed, 150~160V of voltage, into the smelting stage is stablized, bell, bell and body of heater are covered
Rotate simultaneously, stable smelt is more than 10h, and smelt stage terminates, and this process makes to produce in fusion process using capping closing mode
Flue gas, concentration enter fume recovery system, enter middle warehouse after flue gas removing dust, be finally introducing carbon dioxide recovery system
System；
3) the blowing out stage：Voltage is maintained at 120~130V, and into finishing phase is smelted, body of heater continues rotation through 2h or so, melting
Stage terminates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710844005.6A CN107555962A (en) | 2017-09-18 | 2017-09-18 | A kind of fused magnesite and its preparation technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710844005.6A CN107555962A (en) | 2017-09-18 | 2017-09-18 | A kind of fused magnesite and its preparation technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107555962A true CN107555962A (en) | 2018-01-09 |
Family
ID=60980192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710844005.6A Pending CN107555962A (en) | 2017-09-18 | 2017-09-18 | A kind of fused magnesite and its preparation technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107555962A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110002885A (en) * | 2019-04-18 | 2019-07-12 | 辽宁科技大学 | A method of the fused magnesite of zirconium spinel containing magnalium is prepared with electric arc furnaces |
| CN113405366A (en) * | 2021-07-22 | 2021-09-17 | 魏振平 | System and process for smelting sub-vacuum electric melting magnesium oxide and capturing and recovering carbon dioxide |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2303248Y (en) * | 1997-05-26 | 1999-01-06 | 郭茂先 | Electric furnace for melting periclase |
| CN107188584A (en) * | 2017-07-18 | 2017-09-22 | 海城市中兴镁质合成材料有限公司 | A kind of fused magnesite and its preparation technology using dicalcium silicate as combination phase |
-
2017
- 2017-09-18 CN CN201710844005.6A patent/CN107555962A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2303248Y (en) * | 1997-05-26 | 1999-01-06 | 郭茂先 | Electric furnace for melting periclase |
| CN107188584A (en) * | 2017-07-18 | 2017-09-22 | 海城市中兴镁质合成材料有限公司 | A kind of fused magnesite and its preparation technology using dicalcium silicate as combination phase |
Non-Patent Citations (1)
| Title |
|---|
| 尹国祥等: "不同MgO-CaO砂的制备及性能研究", 《2011年耐火原料学术交流会》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110002885A (en) * | 2019-04-18 | 2019-07-12 | 辽宁科技大学 | A method of the fused magnesite of zirconium spinel containing magnalium is prepared with electric arc furnaces |
| CN113405366A (en) * | 2021-07-22 | 2021-09-17 | 魏振平 | System and process for smelting sub-vacuum electric melting magnesium oxide and capturing and recovering carbon dioxide |
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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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180109 |
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| RJ01 | Rejection of invention patent application after publication |