CN106644827A - Method for judging magnesium oxide agglomeration and hydration state in silicon steel magnesium oxide coating solution - Google Patents
Method for judging magnesium oxide agglomeration and hydration state in silicon steel magnesium oxide coating solution Download PDFInfo
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- CN106644827A CN106644827A CN201610849391.3A CN201610849391A CN106644827A CN 106644827 A CN106644827 A CN 106644827A CN 201610849391 A CN201610849391 A CN 201610849391A CN 106644827 A CN106644827 A CN 106644827A
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- magnesia
- masking liquid
- viscosity number
- magnesium oxide
- detection
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- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims abstract description 538
- 239000000395 magnesium oxide Substances 0.000 title claims abstract description 301
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 25
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 15
- 238000005054 agglomeration Methods 0.000 title claims abstract description 11
- 230000002776 aggregation Effects 0.000 title claims abstract description 11
- 239000011248 coating agent Substances 0.000 title abstract description 13
- 238000000576 coating method Methods 0.000 title abstract description 13
- 238000006703 hydration reaction Methods 0.000 title abstract description 4
- 230000036571 hydration Effects 0.000 title abstract 3
- 238000003756 stirring Methods 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims description 226
- 230000000873 masking effect Effects 0.000 claims description 184
- 238000001514 detection method Methods 0.000 claims description 46
- 239000002245 particle Substances 0.000 claims description 44
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 230000008859 change Effects 0.000 claims description 17
- 230000004931 aggregating effect Effects 0.000 claims description 16
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 15
- 229910052749 magnesium Inorganic materials 0.000 claims description 15
- 239000011777 magnesium Substances 0.000 claims description 15
- 230000003647 oxidation Effects 0.000 claims description 12
- 238000007254 oxidation reaction Methods 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 8
- 239000002994 raw material Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000000137 annealing Methods 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 3
- 239000000347 magnesium hydroxide Substances 0.000 description 3
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000004069 differentiation Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000002068 genetic effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000005808 skin problem Effects 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 244000144992 flock Species 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a method for judging magnesium oxide agglomeration and hydration state in silicon steel magnesium oxide coating solution. The method includes steps of detecting initial viscosity value V0 of the magnesium oxide coating; detecting the viscosity value V1 of the magnesium oxide coating; detecting the viscosity value V2 of the magnesium oxide coating; detecting the viscosity value V3 of the magnesium oxide coating; detecting the viscosity value of the magnesium oxide coating V4; judging the agglomeration state in the magnesium oxide coating. The method can exactly judge and measure the magnesium oxide agglomeration and hydration state in the coating, and thereby correspondingly adjusting the magnesium oxide raw material or stirring technique, so as to eliminate or lighten agglomeration, and provide basis for application of technical measures in finally eliminating pitted surface, thin base and other defects in the finished product.
Description
Technical field
The present invention relates to a kind of method of discrimination of material situation, particularly belongs to be aoxidized in a kind of differentiation silicon-steel magnesium oxide masking liquid
The method of magnesium reunion situation.
Background technology
Need to carry out high annealing in orientation silicon steel production process, to complete secondary recrystallization and steel purification.In order to anti-
Stop-band steel needs the upper and lower surface in strip uniformly to coat magnesia masking liquid in the adhesion of high annealing stage.Coating
Magnesia reacts to form magnesium silicate insulating bottom layer in high annealing stage and silicon steel surface oxidation layer, while assisting to remove in steel
The impurity such as nitrogen, sulphur.
At present, magnesia masking liquid is typically configured using Agitation Tank, and magnesia powder is added into water according to finite concentration ratio
In be stirred, certain TiO is added if necessary2And other additives.After stirring mixing certain hour, by double-roller type coating
Machine is coated on strip.Control during use applies liquid temp, controls magnesia coating weight, controls magnesia moisture content
Deng.
However, due in magnesia powder magnesium oxide particle it is tiny, generally micron order even submicron order is being configured to
After masking liquid, attracted each other due to Van der Waals between magnesium oxide particle, aggregate can be formed.Meanwhile, magnesia can be produced
Raw hydration reaction, so as to form a certain amount of magnesium hydroxide on magnesium oxide particle surface so that magnesium oxide particle surface roughness
Increase, exacerbate intergranular reunion.When magnesia aggregate is excessive in masking liquid, when Water-borne paint is excessive, steel band is coated in
On magnesia understand some still in aggregating state（Size is typically between 10～100 microns）.And such magnesia group
Gather after being coated on strip, it is not easy to be thoroughly dried, there is moisture entrapment inside aggregate.At the high annealing stage, can make
The discharge of reunion internal water is not smooth, and causes microcell steel strip surface peroxidating, so as to form the golden defect of point-like leakage.Meanwhile, work as group
Moisture in aggressiveness can cause steel band microcell that plastic deformation, in being genetic to silicon steel finished product, shape occur when expanding under producing high temperature
Into pitted skin or impression defect, product surface quality is had a strong impact on, affect stacked coefficient.
The surface quality problems brought in order to eliminate magnesia reunion, therefore need the group of magnesia in accurately control masking liquid
Poly- state, to apply liquid status to different magnesia the process of distinct methods is carried out.But it is so far, also fast without a kind of convenience
Prompt accurate method, is measured to the aggregating state of magnesia in masking liquid.
At present, one kind be using microscope direct observing method, to observe masking liquid in magnesium oxide particle state, but observation area
Domain is all microcosmic, it is difficult to macroscopic view reflects the overall reunion distribution of magnesia in masking liquid, and is difficult in microcosmic picture
Aggregating state is clearly defined, and this method is, by people's observation, there is different measuring aggregating state is sentenced between person
Disconnected is also discrepant.In addition, microscope work and sample preparation are complex, technical difficulty is larger.
Another way is that it can reflect to a certain extent oxidation using laser particle analyzer measurement magnesium oxide particle distribution
The aggregating state of magnesium.But because the granularity of laser particle analyzer measurement cannot be distinguished by single magnesium oxide particle or magnesia group
Aggressiveness.Additionally, due to the restriction of laser particle size measurement method, its magnesium oxide solution concentration that can be measured must be very low, i.e., far
Less than the concentration during the normal use of magnesia masking liquid, so actual conditions cannot be suitable for, under the concentration state of reflection
Magnesia aggregating state be only capable of as reference.
The content of the invention
The invention reside in for there is no at present facilitate accurate method to characterize silicon-steel magnesium oxide masking liquid in magnesia group
Poly- state, according to the deficiency of silicon-steel magnesium oxide physicochemical characteristic, proposes that one kind accurately reflects painting by masking liquid viscosity measurement
The method of magnesium oxide particle aggregating state in liquid, is to solve because of oxidation so as to provide foundation for the improvement of magnesia coating quality
Magnesia reunion shape in the differentiation silicon-steel magnesium oxide masking liquid of the surface of silicon steel mass defect offer valuable help that magnesium is reunited and caused
The method of condition.
Realize the measure of above-mentioned purpose：
A kind of method for differentiating magnesia reunion and hydrated state in silicon-steel magnesium oxide masking liquid, its step：
1）Detection magnesia masking liquid initial-viscosity number V0, detect initial-viscosity number V0It is to apply liquid temp for 5～11 DEG C in magnesia
Lower employing viscosimeter is carried out；
When magnesia masking liquid to be checked is laboratory preparation, to be then sufficiently stirred in the case where rotating speed is 1000～2000rpm when preparing, and
10～30min of stirring；
2）Detection magnesia masking liquid viscosity number V1, initial-viscosity number V will have been measured0Magnesia masking liquid rotating speed be 1000～
5～20min is stirred under 2000rpm, and detects that magnesia masking liquid glues at making magnesia masking liquid temperature change value less than ± 1.0 DEG C
Angle value V1；
3）Detection magnesia masking liquid viscosity number V2, magnesia masking liquid viscosity number V will have been measured1Magnesia masking liquid be in rotating speed
5～20min is stirred under 4000～5000rpm, and magnesia is detected at making magnesia masking liquid temperature change value less than ± 1.0 DEG C
Masking liquid viscosity number V2；
4）Detection magnesia masking liquid viscosity number V3, magnesia masking liquid viscosity number V will have been measured2Magnesia masking liquid be in rotating speed
5～20min, and detection oxidation at making magnesia masking liquid temperature change value less than ± 1.0 DEG C are stirred under 8000～10000rpm
Magnesium masking liquid viscosity number V3；
5）Detection magnesia masking liquid viscosity number V4, magnesia masking liquid viscosity number V will have been measured3Magnesia masking liquid be in rotating speed
5～20min is stirred under 300～500rpm, and detects that magnesia is applied at making magnesia masking liquid temperature change value less than ± 1.0 DEG C
Fluid viscosity value V4；
6）Aggregating state in magnesia masking liquid is differentiated：
When（V3-V4）/V4 ≤ 20%, show that the particle agglomeration of magnesia is less；When（V2-V1）/V1 When >=10%, show magnesia
Little particle aquation rate it is higher；When（V3-V2）/V2 When >=10%, show that the bulky grain aquation rate of magnesia is higher；When（V2-V1）/
V1 >=10% simultaneously（V3-V2）/V2 When >=10%, show that the aquation rate of magnesia is very high, but it is less to reunite, and surface of steel plate will not go out
Existing pitted skin phenomenon, but peroxidating phenomenon occurs；When（V2-V1）/V1 ＜ 10% is simultaneously（V3-V2）/V2 During ＜ 10%, show oxidation
The aquation rate of magnesium is relatively low, while it is few to reunite, surface of steel plate is not in pitted skin phenomenon, but the partially thin phenomenon of bottom occurs.
When（V3-V4）/V4 ＞ 20%, shows that the particle agglomeration of magnesia is more；When（V2-V1）/V1 When >=10%, show oxygen
The bulky grain reunion for changing magnesium is more；When（V3-V2）/V2 When >=10%, show that the little particle reunion of magnesia is more；When（V2-V1）/
V1 >=10% simultaneously（V3-V2）/V2 When >=10%, show that the aquation rate of magnesia is very low, reunite a lot, surface of steel plate occurs sternly
Weight pitted skin phenomenon, while the partially thin phenomenon of bottom occurs.
Because silicon steel is tiny with magnesium oxide particle, particle size is typically at several microns to tens nanometer ranges.In configuration oxygen
When changing magnesium masking liquid, magnesium oxide particle can attract each other in the presence of Van der Waals in masking liquid, form aggregate, reunite
Body size is typically in several microns to tens micrometer ranges.The aggregating state of magnesia is by magnesium oxide particle surface state, oxidation
Magnesium aquation rate, particle size, stirring condition etc. are relevant.Magnesium oxide particle surface is more coarse, aquation rate is higher, particle size more
Little, mixing speed is faster, and the particle agglomeration of magnesia is more serious；Conversely, particle agglomeration is slighter.
The reunion of magnesium oxide particle in masking liquid can be broken up in high-speed stirred or ultrasonic disperse, big aggregate dispersion
Come.Now, because particle is more dispersed, more tiny, collision probability increases between particle, and the viscosity of masking liquid also can accordingly increase.
So, the difference of viscosity number, can reflect the reunion degree of particle when viscosity number during high-speed stirred and stirring at low speed.Both differences
Value is bigger, illustrates that reunion degree is higher；Otherwise it is lower.
But if magnesia aquation rate is very high, the magnesium hydroxide on magnesium oxide particle top layer can be peeled off during high-speed stirred, be promoted
Aquation inside magnesium oxide particle, so as to dramatically increase magnesia aquation rate.And because the magnesium hydroxide being stripped easily is formed
Flocks shape, can greatly increase the viscosity of solution.So, viscosity is dramatically increased after high-speed stirred, and it is aquation reason, and non-agglomerated
Reason.For this purpose, use stirring at low speed certain hour again after high-speed stirred, if viscosity reduces obvious, illustrate to reunite between particle and
Start, reduce more, reunite more serious；If viscosity does not have significant change, illustrate more stable between particle, without obvious
Reunite and occur.
Because such magnesia is reunited after being coated on strip, it is not easy to be thoroughly dried, have moisture residual inside aggregate
Stay.In the high annealing stage, reunion internal water easily produces discharge not freely, microcell steel strip surface peroxidating is caused, so as to shape
Golden defect is leaked into point-like.Meanwhile, when internal moisture of reuniting expands at high temperature, can cause steel band microcell that plasticity shape occurs
Become, in being genetic to silicon steel finished product, form pitted skin or impression defect.
According to above-mentioned mechanism, it is possible to according to the viscosity change law under different stirring conditions, magnesia in masking liquid is differentiated
The reunion of particle and hydrated state.
The present invention can accurately judge to weigh the reunion of magnesia and hydrated state in masking liquid, former so as to accordingly adjust magnesia
Material or stirring technique, to eliminate or mitigate reunion, provide finally to eliminate partially thin etc. the defect of pitted skin, bottom occurred in finished product
Take the foundation of technical measures.
Specific embodiment
The present invention is described in detail below：
Embodiment 1
The A type magnesia masking liquids prepared for production line that the present embodiment takes, it is 8.0 DEG C to apply liquid temp；
The method for differentiating magnesia reunion situation in A type magnesia masking liquids, its step：
1）Detection magnesia masking liquid initial-viscosity number V0, detect initial-viscosity number V0It is in the case where magnesia applies liquid temp for 8.0 DEG C
Carried out using viscosimeter；The initial-viscosity number V for detecting0For 42.1cp；
2）Detection magnesia masking liquid viscosity number V1, initial-viscosity number V will have been measured0Magnesia masking liquid rotating speed be 2000rpm
Lower stirring 20min, magnesia masking liquid temperature change value is 0.3 DEG C, i.e., in the case where magnesia applies liquid temp for 8.3 DEG C, detection oxidation
Magnesium masking liquid viscosity number V1For 42.8cP；
3）Detection magnesia masking liquid viscosity number V2, magnesia masking liquid viscosity number V will have been measured1Magnesia masking liquid be in rotating speed
10min is stirred under 5000rpm, and makes magnesia apply liquid temp and magnesia masking liquid viscosity number V is detected at 8.8 DEG C2For 46.1cP；
4）Detection magnesia masking liquid viscosity number V3, magnesia masking liquid viscosity number V will have been measured2Magnesia masking liquid be in rotating speed
10min is stirred under 10000rpm, and makes magnesia apply liquid temp and magnesia masking liquid viscosity number V is detected at 9.5 DEG C3For
47.4cP；
5）Detection magnesia masking liquid viscosity number V4, magnesia masking liquid viscosity number V will have been measured3Magnesia masking liquid be in rotating speed
10min is stirred under 500rpm, and makes magnesia apply liquid temp and magnesia masking liquid viscosity number V is detected at 10.3 DEG C4For 44.0cP；
6）Aggregating state in magnesia masking liquid is differentiated：
It is known：V1For 42.8cP, V2For 46.1cP, V3For 47.4cP, V4For 44.0cP, and substitute into respective formula and differentiated：
It is computed：（V3-V4）/V4=7.7%≤20%, show that the overall of magnesia is reunited less；
（V2-V1）/V1=7.7% ＜ 10%, shows that the bulky grain reunion of magnesia is less；
（V3-V2）/V2 =2.8% ＜ 10%, shows that the little particle reunion of magnesia is less；
Due to（V3-V4）/V4 ≤ 20%, and（V2-V1）/V1 ＜ 10%,（V3-V2）/V2 ＜ 10%, therefore show the present embodiment magnesia
It is overall reunite little, therefore will not be not in pitted skin and impression problem in surface of steel plate, but due to aquation rate it is low, it may appear that bottom
The partially thin phenomenon of layer.Verified, its result tallies with the actual situation.
Embodiment 2
The Type B magnesia masking liquid prepared for production line that the present embodiment takes, it is 6.0 DEG C to apply liquid temp；
The method for differentiating magnesia reunion situation in Type B magnesia masking liquid, its step：
1）Detection magnesia masking liquid initial-viscosity number V0, detect initial-viscosity number V0It is in the case where magnesia applies liquid temp for 6.0 DEG C
Carried out using viscosimeter；The initial-viscosity number V for detecting0For 72.5cP；
2）Detection magnesia masking liquid viscosity number V1, initial-viscosity number V will have been measured0Magnesia masking liquid rotating speed be 2000rpm
Lower stirring 5min, magnesia masking liquid temperature change value is 0.5 DEG C, i.e., in the case where magnesia applies liquid temp for 6.5 DEG C, detect magnesia
Masking liquid viscosity number V1For 71.4cP；
3）Detection magnesia masking liquid viscosity number V2, magnesia masking liquid viscosity number V will have been measured1Magnesia masking liquid be in rotating speed
15min is stirred under 4500rpm, and makes magnesia apply liquid temp and magnesia masking liquid viscosity number V is detected at 6.9 DEG C2For 82.1cP；
4）Detection magnesia masking liquid viscosity number V3, magnesia masking liquid viscosity number V will have been measured2Magnesia masking liquid be in rotating speed
5min is stirred under 9000rpm, and makes magnesia apply liquid temp and magnesia masking liquid viscosity number V is detected at 7.3 DEG C3For 97.6cP；
5）Detection magnesia masking liquid viscosity number V4, magnesia masking liquid viscosity number V will have been measured3Magnesia masking liquid be in rotating speed
20min is stirred under 300rpm, and makes magnesia apply liquid temp and magnesia masking liquid viscosity number V is detected at 8.3 DEG C4For 76.7cP；
6）Aggregating state in magnesia masking liquid is differentiated：
It is known：V1For 71.4cP, V2For 82.1cP, V3For 97.6cP, V4For 76.7cP, and substitute into respective formula and differentiated：
It is computed：（V3-V4）/V4=27.2% ＞ 20%, shows that the entirety reunion of magnesia is more；
（V2-V1）/V1=15% >=10%, show that the bulky grain reunion of magnesia is more；
（V3-V2）/V2 =18.9% >=10%, show that the little particle reunion of magnesia is also more；
Due to（V3-V4）/V4 ＞ 20%, and（V2-V1）/V1 >=10%,（V3-V2）/V2 >=10%, therefore show the present embodiment magnesia
It is overall reunite a lot, therefore more serious pitted skin and impression problem occurs in surface of steel plate.Verified, its result meets reality
Border situation.
Embodiment 3
The c-type magnesia masking liquid prepared for production line that the present embodiment takes, it is 6.5 DEG C to apply liquid temp；
The method for differentiating magnesia reunion situation in c-type magnesia masking liquid, its step：
1）Detection magnesia masking liquid initial-viscosity number V0, detect initial-viscosity number V0It is in the case where magnesia applies liquid temp for 6.5 DEG C
Carried out using viscosimeter；The initial-viscosity number V for detecting0For 28.7cP；
2）Detection magnesia masking liquid viscosity number V1, initial-viscosity number V will have been measured0Magnesia masking liquid rotating speed be 1500rpm
Lower stirring 5min, magnesia masking liquid temperature change value is 0.2 DEG C, i.e., in the case where magnesia applies liquid temp for 6.7 DEG C, detect magnesia
Masking liquid viscosity number V1For 28.8cP；
3）Detection magnesia masking liquid viscosity number V2, magnesia masking liquid viscosity number V will have been measured1Magnesia masking liquid be in rotating speed
20min is stirred under 5000rpm, and makes magnesia apply liquid temp and magnesia masking liquid viscosity number V is detected at 7.0 DEG C2For 32.6cP；
4）Detection magnesia masking liquid viscosity number V3, magnesia masking liquid viscosity number V will have been measured2Magnesia masking liquid be in rotating speed
20min is stirred under 10000rpm, and makes magnesia apply liquid temp and magnesia masking liquid viscosity number V is detected at 7.6 DEG C3For
36.5cP；
5）Detection magnesia masking liquid viscosity number V4, magnesia masking liquid viscosity number V will have been measured3Magnesia masking liquid be in rotating speed
20min is stirred under 300rpm, and makes magnesia apply liquid temp and magnesia masking liquid viscosity number V is detected at 8.1 DEG C4For 36.1cP；
6）Aggregating state in magnesia masking liquid is differentiated：
It is known：V1For 28.8cP, V2For 32.6cP, V3For 36.5cP, V4For 36.1cP, and substitute into respective formula and differentiated：
It is computed：（V3-V4）/V4=1.1%≤20%, show that magnesia is integrally reunited seldom；
Now（V2-V1）/V1=13.2% >=10%, show that the little particle aquation rate of magnesia is higher；
（V3-V2）/V2 =12% >=10%, show that the bulky grain aquation rate of magnesia is higher；
Due to（V3-V4）/V4 ≤ 20%, and（V2-V1）/V1 >=10%,（V3-V2）/V2 >=10%, therefore show the present embodiment magnesia
It is overall reunite little, be not in obvious pitted skin and impression problem in surface of steel plate；But the aquation rate of magnesia is higher, meeting
Cause more serious oxidation tint defect.Verified, its result tallies with the actual situation.
Embodiment 4
The D type magnesia masking liquids prepared for production line that the present embodiment takes, it is 6.8 DEG C to apply liquid temp；
The method for differentiating magnesia reunion situation in D type magnesia masking liquids, its step：
1）Detection magnesia masking liquid initial-viscosity number V0, detect initial-viscosity number V0It is in the case where magnesia applies liquid temp for 6.8 DEG C
Carried out using viscosimeter；The initial-viscosity number V for detecting0For 73.0cP；
2）Detection magnesia masking liquid viscosity number V1, initial-viscosity number V will have been measured0Magnesia masking liquid rotating speed be 2000rpm
Lower stirring 10min, magnesia masking liquid temperature change value is 0.2 DEG C, i.e., in the case where magnesia applies liquid temp for 7.0 DEG C, detection oxidation
Magnesium masking liquid viscosity number V1For 73.3cP；
3）Detection magnesia masking liquid viscosity number V2, magnesia masking liquid viscosity number V will have been measured1Magnesia masking liquid be in rotating speed
5min is stirred under 4000rpm, and makes magnesia apply liquid temp and magnesia masking liquid viscosity number V is detected at 7.4 DEG C2For 83.9cP；
4）Detection magnesia masking liquid viscosity number V3, magnesia masking liquid viscosity number V will have been measured2Magnesia masking liquid be in rotating speed
5min is stirred under 8000rpm, and makes magnesia apply liquid temp and magnesia masking liquid viscosity number V is detected at 7.9 DEG C3For 84.0cP；
5）Detection magnesia masking liquid viscosity number V4, magnesia masking liquid viscosity number V will have been measured3Magnesia masking liquid be in rotating speed
20min is stirred under 400rpm, and makes magnesia apply liquid temp and magnesia masking liquid viscosity number V is detected at 8.7 DEG C4For 82.1cP；
6）Aggregating state in magnesia masking liquid is differentiated：
It is known：V1For 73.3cP, V2For 83.9cP, V3For 84.0cP, V4For 82.1cP, and substitute into respective formula and differentiated：
It is computed：（V3-V4）/V4=2.3% ＜ 20%, shows that magnesia is integrally reunited few；
（V2-V1）/V1=14.5% >=10%, show that the little particle aquation rate of magnesia is higher；
（V3-V2）/V2 =0.1% ＜ 10%, shows that the little particle reunion of magnesia is also less；
Due to（V3-V4）/V4 ＜ 20%, and（V2-V1）/V1 >=10%,（V3-V2）/V2 ＜ 10%, therefore show the present embodiment magnesia
It is overall reunite little, but aquation rate is higher, is not in pitted skin problem in surface of steel plate, does not also result in obvious bottom inclined
Thin problem.Verified, its result tallies with the actual situation.
Embodiment 5
The E type magnesia masking liquids prepared for production line that the present embodiment takes, it is 5.4 DEG C to apply liquid temp；
The method for differentiating magnesia reunion situation in E type magnesia masking liquids, its step：
1）Detection magnesia masking liquid initial-viscosity number V0, detect initial-viscosity number V0It is in the case where magnesia applies liquid temp for 5.5 DEG C
Carried out using viscosimeter；The initial-viscosity number V for detecting0For 70.4cP；
2）Detection magnesia masking liquid viscosity number V1, initial-viscosity number V will have been measured0Magnesia masking liquid rotating speed be 1400rpm
Lower stirring 8min, magnesia masking liquid temperature change value is 0.2 DEG C, i.e., in the case where magnesia applies liquid temp for 5.7 DEG C, detect magnesia
Masking liquid viscosity number V1For 71.6cP；
3）Detection magnesia masking liquid viscosity number V2, magnesia masking liquid viscosity number V will have been measured1Magnesia masking liquid be in rotating speed
10min is stirred under 4500rpm, and makes magnesia apply liquid temp and magnesia masking liquid viscosity number V is detected at 6.0 DEG C2For 77.5cP；
4）Detection magnesia masking liquid viscosity number V3, magnesia masking liquid viscosity number V will have been measured2Magnesia masking liquid be in rotating speed
8min is stirred under 10000rpm, and makes magnesia apply liquid temp and magnesia masking liquid viscosity number V is detected at 6.2 DEG C3For 80.2cP；
5）Detection magnesia masking liquid viscosity number V4, magnesia masking liquid viscosity number V will have been measured3Magnesia masking liquid be in rotating speed
10min is stirred under 500rpm, and makes magnesia apply liquid temp and magnesia masking liquid viscosity number V is detected at 6.6 DEG C4For 73.2cP；
6）Aggregating state in magnesia masking liquid is differentiated：
It is known：V1For 71.6cP, V2For 77.5cP, V3For 80.2cP, V4For 73.2cP, and substitute into respective formula and differentiated：
It is computed：（V3-V4）/V4=2.3% >=20%, show that the entirety reunion of magnesia is more；
（V2-V1）/V1=8.2% >=10%, show that the bulky grain reunion of magnesia is more；
（V3-V2）/V2 =3.5% ＜ 10%, shows that the little particle reunion of magnesia is less；
Due to（V3-V4）/V4 >=20%, and（V2-V1）/V1 >=10%,（V3-V2）/V2 ＜ 10%, therefore show the present embodiment magnesia
Entirety reunite it is more, wherein bulky grain reunite it is more, bulky grain pitted skin problem occurs in surface of steel plate.It is verified, its knot
Fruit tallies with the actual situation.
Embodiment 6
The present embodiment takes production A type magnesia, carries out with liquid in laboratory, and in the case where rotating speed is 1500rpm 20min, oxygen are stirred
Change magnesium and apply 5.0 DEG C of liquid temp, the method for differentiating magnesia reunion situation in E type magnesia masking liquids, its step：
1）Detection magnesia masking liquid initial-viscosity number V0, detect initial-viscosity number V0It is in the case where magnesia applies liquid temp for 5.0 DEG C
Carried out using viscosimeter；The initial-viscosity number V for detecting0For 40.3cP；
2）Detection magnesia masking liquid viscosity number V1, initial-viscosity number V will have been measured0Magnesia masking liquid rotating speed be 1500rpm
Lower stirring 20min, magnesia masking liquid temperature change value is 0.2 DEG C, i.e., in the case where magnesia applies liquid temp for 5.2 DEG C, detection oxidation
Magnesium masking liquid viscosity number V1For 42.3cP；
3）Detection magnesia masking liquid viscosity number V2, magnesia masking liquid viscosity number V will have been measured1Magnesia masking liquid be in rotating speed
15min is stirred under 5000rpm, and makes magnesia apply liquid temp and magnesia masking liquid viscosity number V is detected at 6.0 DEG C2For 45.4cP；
4）Detection magnesia masking liquid viscosity number V3, magnesia masking liquid viscosity number V will have been measured2Magnesia masking liquid be in rotating speed
8min is stirred under 10000rpm, and makes magnesia apply liquid temp and magnesia masking liquid viscosity number V is detected at 6.2 DEG C3For 46.0cP；
5）Detection magnesia masking liquid viscosity number V4, magnesia masking liquid viscosity number V will have been measured3Magnesia masking liquid be in rotating speed
10min is stirred under 500rpm, and makes magnesia apply liquid temp and magnesia masking liquid viscosity number V is detected at 6.3 DEG C4For 44.6 cP；
6）Aggregating state in magnesia masking liquid is differentiated：
It is known：V1For 42.3cP, V2For 45.4cP, V3For 46.0cP, V4For 44.6cP, and substitute into respective formula and differentiated：
It is computed：（V3-V4）/V4=3.1%≤20%, show that the overall of magnesia is reunited less；
（V2-V1）/V1=7.3% ＜ 10%, shows that the bulky grain reunion of magnesia is less；
（V3-V2）/V2 =1.3% ＜ 10%, shows that the little particle reunion of magnesia is less；
Due to（V3-V4）/V4 ≤ 20%, and（V2-V1）/V1 ＜ 10%,（V3-V2）/V2 ＜ 10%, therefore show the present embodiment magnesia
The overall of solution is reunited seldom, and aquation rate is low.Verified, its result meets scanning electron microscopic observation and aquation rate detection feelings
Condition.
This specific embodiment is only most preferably enumerated, not to the restricted enforcement of technical solution of the present invention.
Claims (2)
1. it is a kind of differentiate silicon-steel magnesium oxide masking liquid in magnesia reunite and hydrated state method, its step：
1）Detection magnesia masking liquid initial-viscosity number V0, detect initial-viscosity number V0It is in the case where magnesia applies liquid temp for 5～11 DEG C
Carried out using viscosimeter；
When magnesia masking liquid to be checked is laboratory preparation, to be then sufficiently stirred in the case where rotating speed is 1000～2000rpm when preparing, and
10～30min of stirring；
2）Detection magnesia masking liquid viscosity number V1, initial-viscosity number V will have been measured0Magnesia masking liquid rotating speed be 1000～
5～20min is stirred under 2000rpm, and detects that magnesia masking liquid glues at making magnesia masking liquid temperature change value less than ± 1.0 DEG C
Angle value V1；
3）Detection magnesia masking liquid viscosity number V2, magnesia masking liquid viscosity number V will have been measured1Magnesia masking liquid be in rotating speed
5～20min is stirred under 4000～5000rpm, and magnesia is detected at making magnesia masking liquid temperature change value less than ± 1.0 DEG C
Masking liquid viscosity number V2；
4）Detection magnesia masking liquid viscosity number V3, magnesia masking liquid viscosity number V will have been measured2Magnesia masking liquid be in rotating speed
5～20min, and detection oxidation at making magnesia masking liquid temperature change value less than ± 1.0 DEG C are stirred under 8000～10000rpm
Magnesium masking liquid viscosity number V3；
5）Detection magnesia masking liquid viscosity number V4, magnesia masking liquid viscosity number V will have been measured3Magnesia masking liquid rotating speed be 300
5～20min is stirred under～500rpm, and magnesia masking liquid is detected at making magnesia masking liquid temperature change value less than ± 1.0 DEG C
Viscosity number V4；
6）Aggregating state in magnesia masking liquid is differentiated：
When（V3-V4）/V4 ≤ 20%, show that the particle agglomeration of magnesia is less；When（V2-V1）/V1 When >=10%, show magnesia
Little particle aquation rate it is higher；When（V3-V2）/V2 When >=10%, show that the bulky grain aquation rate of magnesia is higher；When（V2-V1）/
V1 >=10% simultaneously（V3-V2）/V2 When >=10%, show that the aquation rate of magnesia is very high, but it is less to reunite, and surface of steel plate will not go out
Existing pitted skin phenomenon, but peroxidating phenomenon occurs；When（V2-V1）/V1 ＜ 10% is simultaneously（V3-V2）/V2 During ＜ 10%, show oxidation
The aquation rate of magnesium is relatively low, while it is few to reunite, surface of steel plate is not in pitted skin phenomenon, but the partially thin phenomenon of bottom occurs.
2. work as（V3-V4）/V4 ＞ 20%, shows that the particle agglomeration of magnesia is more；When（V2-V1）/V1 When >=10%, show oxidation
The bulky grain of magnesium is reunited more；When（V3-V2）/V2 When >=10%, show that the little particle reunion of magnesia is more；When（V2-V1）/V1
>=10% simultaneously（V3-V2）/V2 When >=10%, show that the aquation rate of magnesia is very low, reunite a lot, surface of steel plate occurs seriously
Pitted skin phenomenon, while the partially thin phenomenon of bottom occurs.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107694890A (en) * | 2017-09-01 | 2018-02-16 | 北京曙光航空电气有限责任公司 | A kind of painting method of 1J22 punchings magnesia film |
| CN109371213A (en) * | 2018-09-29 | 2019-02-22 | 武汉钢铁有限公司 | The control method of orientation silicon steel magnesia masking liquid temperature |
| CN118641404A (en) * | 2024-08-13 | 2024-09-13 | 山东国茂冶金材料有限公司 | Method and equipment for detecting hydration rate of magnesite fine powder sample |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107694890A (en) * | 2017-09-01 | 2018-02-16 | 北京曙光航空电气有限责任公司 | A kind of painting method of 1J22 punchings magnesia film |
| CN109371213A (en) * | 2018-09-29 | 2019-02-22 | 武汉钢铁有限公司 | The control method of orientation silicon steel magnesia masking liquid temperature |
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| CN118641404A (en) * | 2024-08-13 | 2024-09-13 | 山东国茂冶金材料有限公司 | Method and equipment for detecting hydration rate of magnesite fine powder sample |
| CN118641404B (en) * | 2024-08-13 | 2024-10-11 | 山东国茂冶金材料有限公司 | Method and equipment for detecting hydration rate of magnesite fine powder sample |
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