CN108145105A - A kind of special kaolin of crystallizer protecting residue and its preparation method and application - Google Patents
A kind of special kaolin of crystallizer protecting residue and its preparation method and application Download PDFInfo
- Publication number
- CN108145105A CN108145105A CN201710501626.4A CN201710501626A CN108145105A CN 108145105 A CN108145105 A CN 108145105A CN 201710501626 A CN201710501626 A CN 201710501626A CN 108145105 A CN108145105 A CN 108145105A
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- Prior art keywords
- slurry
- kaolin
- ore slurry
- kaolin ore
- parts
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/111—Treating the molten metal by using protecting powders
Abstract
The invention discloses a kind of special kaolin of crystallizer protecting residue; belong to continuous-casting steel pouring technical field; it is intended to effectively coordinate the contradiction of covering slag lubrication strand and Heat Transfer Control in casting process, the special kaolin of the crystallizer protecting residue includes following parts by weight of component：65~66 parts of SiO2, 25~26 parts of Al2O3, 1.5~2 parts of Fe2O3, 1~2 part of CaO, 1~2 part of MgO；The present invention is used for the production of crystallizer protecting residue used during continuous-casting steel pouring.
Description
Technical field
The present invention relates to continuous-casting steel pouring technologies more particularly to a kind of special kaolin of crystallizer protecting residue and preparation method thereof
And application.
Background technology
In continuous casting production process, due to the generation of peritectic reaction during solidification of molten steel, initial solidification shell contraction is larger, and
And growth is not easy uniformly, easily to generate lobe because of stress concentration.It it requires that covering slag slag film has near meniscus
The ability of stronger Heat Transfer Control, heat transfer of the strand to crystallizer to be controlled to reduce casting billet surface so as to uniform initial solidification shell and indulge
The incidence split.
For this problem, researchers have attempted various solution routes, such as in crystallizer top copper coin coating to reduce
Hot-fluid；It adds in transition group metallic oxide and carrys out Heat Transfer Control etc. to reduce solid slag film infrared light transmission coefficient.But due to technology
It is limited with condition, it is all not commonly used at present.
The method that people generally use at present is to improve the basicity of covering slag to improve covering slag crystal property, makes covering slag
There is the probability of lobe with Heat Transfer Control so as to reduce strand in rapid, high volume crystallization near meniscus.It is but attached in meniscus
It is lepthymenia that nearly rapid, high volume crystallization is easy to cause the region melt cinder, increases initial solidification shell friction, particularly high pulling rate
In the case of, liquid fluctuating may lead to meniscus temperature fluctuation nearby, if covering slag crystal property is too strong, be easy to cause curved
A large amount of solid matters are nearby precipitated in lunar surface, deteriorate lubrication and even result in bonding steel leakage.
Although having a series of prevention methods, such as flow fieldoptimization, electromagnetic braking, close packed roller etc. for liquid fluctuating,
It is that covering slag lubricates and the contradiction of heat transfer, this point are particularly bright in peritectoid plate slab high-speed continuous casting there is no fundamentally solving
It is aobvious.So the characteristic of traditional high crystalline covering slag limits the high pulling rate of continuous casting peritectic steel slab.
How to coordinate continuous casting peritectic steel covering slag lubrication and control uniformly transfer heat performance reform into one it is urgently to be resolved hurrily
Problem.
Invention content
For the deficiency of above-mentioned technology, the present invention is intended to provide it is a kind of effectively coordinated peritectic steel sheet billet continuous casting during
Covering slag lubricates the special kaolin of crystallizer protecting residue of the contradiction of strand and Heat Transfer Control, and the present invention also provides the kaolin
Preparation method and application.
In order to solve the above technical problem, the present invention provides previous technical solution be such：A kind of crystallizer protection
The special kaolin of slag, including following parts by weight of component：65~66 parts of SiO2, 25~26 parts of Al2O3, 1.5~2 parts of Fe2O3, 1~2 part
CaO, 1~2 part of MgO.
The latter technique scheme of the present invention is such：A kind of special kaolinic system of crystallizer protecting residue as described above
Preparation Method includes the following steps：
Step 1：Kaolin mineral aggregate is isolated into clay, sundries, 4~8 times of water is then added in and slurry is made, obtain kaolin ore
Starch the first slurry；
Step 2：By the first slurry of kaolin ore slurry and sodium hydrosulfite kaolin ore slurry in mass ratio:Sodium hydrosulfite=1:0.001
~0.002 is uniformly mixed, and then adjusts its pH value to 2~5, obtains the second slurry of kaolin ore slurry；
Step 3：The second slurry of kaolin ore slurry that step 2 obtains is placed in the ion equipped with solid ion-exchange resin to hand over
It changes in blender, stirs 0.5 hour~2 hours, obtain kaolin ore slurry third slurry；
Step 4：The solid ion-exchange resin contained in kaolin ore slurry third slurry that step 3 obtains is isolated
Come, obtain kaolin ore slurry fine fodder；
Step 5：The kaolin ore slurry fine fodder that step 4 obtains is washed, it is dry, you can.
Wherein, the pH adjusting agent is any one of oxalic acid, phosphoric acid；The sodium hydrosulfite is thiourea dioxide, connects two
Any one of sodium sulfite.
A kind of special kaolin of crystallizer protecting residue, crystallizer protecting residue used during applied to production continuous-casting steel pouring.
The present invention has the following advantages compared with conventional method：
1) weight percent of CaO is higher in the kaolin so that former slag crystal property is very strong, is conducive to covering slag curved
Rapid, high volume crystallization is with Heat Transfer Control near lunar surface；
2) a certain amount of amphoteric oxide is incorporated in kaolin, makes the glassy opposite enhancing of remaining melt cinder, improves green shell
Lubrication state reduces bonding and bleed-out.
Specific embodiment
Claims are described further with reference to specific embodiment, but do not form any limit to the present invention
System, it is any to still fall within invention which is intended to be protected making limited number of time to the present invention and change obtained technical solution.
Embodiment 1
Step 1：Kaolin mineral aggregate is isolated into clay, sundries, 4 times of water is then added in and slurry is made, obtain kaolin ore slurry
First slurry；
Step 2：By the first slurry of kaolin ore slurry and sodium hydrosulfite kaolin ore slurry in mass ratio:Sodium hydrosulfite=1:0.001
It is uniformly mixed, then adjusts its pH value to 5, obtain the second slurry of kaolin ore slurry；
Step 3：The second slurry of kaolin ore slurry that step 2 obtains is placed in the ion equipped with solid ion-exchange resin to hand over
It changes in blender, stirs 0.5 hour, obtain kaolin ore slurry third slurry；
Step 4：The solid ion-exchange resin contained in kaolin ore slurry third slurry that step 3 obtains is isolated
Come, obtain kaolin ore slurry fine fodder；
Step 5：The kaolin ore slurry fine fodder that step 4 obtains is washed, it is dry, you can.
The special kaolin of crystallizer protecting residue obtained by the present embodiment, including following parts by weight of component：65.12 part SiO2,
25.3 part Al2O3, 1.5 parts of Fe2O3, 1.8 parts of CaO, 1.3 parts of MgO.
Embodiment 2
Step 1：Kaolin mineral aggregate is isolated into clay, sundries, 8 times of water is then added in and slurry is made, obtain kaolin ore slurry
First slurry；
Step 2：By the first slurry of kaolin ore slurry and sodium hydrosulfite kaolin ore slurry in mass ratio:Sodium hydrosulfite=1:0.002
It is uniformly mixed, then adjusts its pH value to 2, obtain the second slurry of kaolin ore slurry；
Step 3：The second slurry of kaolin ore slurry that step 2 obtains is placed in the ion equipped with solid ion-exchange resin to hand over
It changes in blender, stirs 2 hours, obtain kaolin ore slurry third slurry；
Step 4：The solid ion-exchange resin contained in kaolin ore slurry third slurry that step 3 obtains is isolated
Come, obtain kaolin ore slurry fine fodder；
Step 5：The kaolin ore slurry fine fodder that step 4 obtains is washed, it is dry, you can.
The special kaolin of crystallizer protecting residue obtained by the present embodiment, including following parts by weight of component：65.8 part SiO2, 26
Part Al2O3, 1.81 parts of Fe2O3, 2 parts of CaO, 1.9 parts of MgO.
Embodiment 3
Step 1：Kaolin mineral aggregate is isolated into clay, sundries, 6 times of water is then added in and slurry is made, obtain kaolin ore slurry
First slurry；
Step 2：By the first slurry of kaolin ore slurry and sodium hydrosulfite kaolin ore slurry in mass ratio:Sodium hydrosulfite=1:0.0015
It is uniformly mixed, then adjusts its pH value to 3, obtain the second slurry of kaolin ore slurry；
Step 3：The second slurry of kaolin ore slurry that step 2 obtains is placed in the ion equipped with solid ion-exchange resin to hand over
It changes in blender, stirs 1.5 hours, obtain kaolin ore slurry third slurry；
Step 4：The solid ion-exchange resin contained in kaolin ore slurry third slurry that step 3 obtains is isolated
Come, obtain kaolin ore slurry fine fodder；
Step 5：The kaolin ore slurry fine fodder that step 4 obtains is washed, it is dry, you can.
The special kaolin of crystallizer protecting residue obtained by the present embodiment, including following parts by weight of component：66 parts of SiO2, 25 parts
Al2O3, 2 parts of Fe2O3, 1.98 parts of CaO, 1.5 parts of MgO.
These are only specific embodiments of the present invention, it is all made in the range of the spirit and principles in the present invention any repair
Change, equivalent replacement and improvement etc., should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of special kaolin of crystallizer protecting residue, which is characterized in that including following parts by weight of component：65~66 parts of SiO2, 25
~26 parts of Al2O3, 1.5~2 parts of Fe2O3, 1~2 part of CaO, 1~2 part of MgO.
2. a kind of special kleit preparation method of crystallizer protecting residue as described in claim 1, which is characterized in that including with
Lower step：
Step 1：Kaolin mineral aggregate is isolated into clay, sundries, 4~8 times of water is then added in and slurry is made, obtain kaolin ore slurry the
One slurry；
Step 2：By the first slurry of kaolin ore slurry and sodium hydrosulfite kaolin ore slurry in mass ratio:Sodium hydrosulfite=1:0.001~
0.002 is uniformly mixed, and then adjusts its pH value to 2~5, obtains the second slurry of kaolin ore slurry；
Step 3：The second slurry of kaolin ore slurry that step 2 obtains is placed in the ion exchange equipped with solid ion-exchange resin to stir
It mixes in device, stirs 0.5 hour~2 hours, obtain kaolin ore slurry third slurry；
Step 4：The solid ion-exchange resin contained in kaolin ore slurry third slurry that step 3 obtains is separated, is obtained
To kaolin ore slurry fine fodder；
Step 5：The kaolin ore slurry fine fodder that step 4 obtains is washed, it is dry, you can.
3. the special kleit preparation method of crystallizer protecting residue according to claim 2, which is characterized in that the pH tune
Section agent is any one of oxalic acid, phosphoric acid；The sodium hydrosulfite is any one of thiourea dioxide, sodium dithionite.
A kind of 4. special kaolin of crystallizer protecting residue, which is characterized in that crystallizer used protection during applied to continuous-casting steel pouring
The production of slag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710501626.4A CN108145105A (en) | 2017-06-27 | 2017-06-27 | A kind of special kaolin of crystallizer protecting residue and its preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710501626.4A CN108145105A (en) | 2017-06-27 | 2017-06-27 | A kind of special kaolin of crystallizer protecting residue and its preparation method and application |
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| CN108145105A true CN108145105A (en) | 2018-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87108182A (en) * | 1987-12-23 | 1988-08-10 | 地方国营西峡县石墨矿 | The manufacture method of composite protective dreg for model cast |
| CN101531372A (en) * | 2009-04-03 | 2009-09-16 | 茂名市银华高岭土实业有限公司 | Kaoline alkaline static bleaching technology |
| CN102020286A (en) * | 2010-11-11 | 2011-04-20 | 茂名市银华高岭土实业有限公司 | Acid-free kaolin bleaching process method |
| CN102233411A (en) * | 2011-06-27 | 2011-11-09 | 河南通宇冶材集团有限公司 | Low-alkalinity crystallizer covering slag prepared from building waste clay |
| CN104446339A (en) * | 2014-11-05 | 2015-03-25 | 吴俊荣 | Preparation method of kaolin |
-
2017
- 2017-06-27 CN CN201710501626.4A patent/CN108145105A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87108182A (en) * | 1987-12-23 | 1988-08-10 | 地方国营西峡县石墨矿 | The manufacture method of composite protective dreg for model cast |
| CN101531372A (en) * | 2009-04-03 | 2009-09-16 | 茂名市银华高岭土实业有限公司 | Kaoline alkaline static bleaching technology |
| CN102020286A (en) * | 2010-11-11 | 2011-04-20 | 茂名市银华高岭土实业有限公司 | Acid-free kaolin bleaching process method |
| CN102233411A (en) * | 2011-06-27 | 2011-11-09 | 河南通宇冶材集团有限公司 | Low-alkalinity crystallizer covering slag prepared from building waste clay |
| CN104446339A (en) * | 2014-11-05 | 2015-03-25 | 吴俊荣 | Preparation method of kaolin |
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Application publication date: 20180612 |
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