CN103641504B - A kind of take waste magnesia carbon brick as coating of main raw material and preparation method thereof - Google Patents
A kind of take waste magnesia carbon brick as coating of main raw material and preparation method thereof Download PDFInfo
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- CN103641504B CN103641504B CN201310663937.2A CN201310663937A CN103641504B CN 103641504 B CN103641504 B CN 103641504B CN 201310663937 A CN201310663937 A CN 201310663937A CN 103641504 B CN103641504 B CN 103641504B
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- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims abstract description 148
- 239000000395 magnesium oxide Substances 0.000 title claims abstract description 74
- 239000002699 waste material Substances 0.000 title claims abstract description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 239000011449 brick Substances 0.000 title claims abstract description 33
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 33
- 239000011248 coating agent Substances 0.000 title claims abstract description 31
- 238000000576 coating method Methods 0.000 title claims abstract description 31
- 239000002994 raw material Substances 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000003595 mist Substances 0.000 claims abstract description 53
- 235000019832 sodium triphosphate Nutrition 0.000 claims abstract description 32
- 239000011575 calcium Substances 0.000 claims abstract description 20
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 20
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 19
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000000835 fiber Substances 0.000 claims abstract description 19
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 19
- JXLHNMVSKXFWAO-UHFFFAOYSA-N azane;7-fluoro-2,1,3-benzoxadiazole-4-sulfonic acid Chemical compound N.OS(=O)(=O)C1=CC=C(F)C2=NON=C12 JXLHNMVSKXFWAO-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229920005610 lignin Polymers 0.000 claims abstract description 18
- 101710194948 Protein phosphatase PhpP Proteins 0.000 claims abstract description 16
- HWGNBUXHKFFFIH-UHFFFAOYSA-I pentasodium;[oxido(phosphonatooxy)phosphoryl] phosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O HWGNBUXHKFFFIH-UHFFFAOYSA-I 0.000 claims abstract description 16
- 239000011734 sodium Substances 0.000 claims abstract description 16
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 16
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000000470 constituent Substances 0.000 claims abstract description 10
- 239000002245 particle Substances 0.000 claims description 74
- 238000002156 mixing Methods 0.000 claims description 28
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 6
- YTAHJIFKAKIKAV-XNMGPUDCSA-N [(1R)-3-morpholin-4-yl-1-phenylpropyl] N-[(3S)-2-oxo-5-phenyl-1,3-dihydro-1,4-benzodiazepin-3-yl]carbamate Chemical compound O=C1[C@H](N=C(C2=C(N1)C=CC=C2)C1=CC=CC=C1)NC(O[C@H](CCN1CCOCC1)C1=CC=CC=C1)=O YTAHJIFKAKIKAV-XNMGPUDCSA-N 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 5
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 230000003628 erosive effect Effects 0.000 abstract description 5
- 208000037656 Respiratory Sounds Diseases 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000007306 turnover Effects 0.000 abstract description 2
- 239000004576 sand Substances 0.000 description 4
- 230000002742 anti-folding effect Effects 0.000 description 3
- 229910001570 bauxite Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052609 olivine Inorganic materials 0.000 description 2
- 239000010450 olivine Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052839 forsterite Inorganic materials 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000006028 limestone 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
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Ceramic Products (AREA)
Abstract
The invention discloses a kind of take waste magnesia carbon brick as coating of main raw material and preparation method thereof, comprises following component and each constituent mass per-cent is: waste magnesia carbon brick: 78 ~ 82wt%; Magnesia micro mist: 13.7 ~ 16.7wt%; Silicon powder: 2.3 ~ 2.7wt%; Tripoly phosphate sodium STPP: 0.1 ~ 0.2wt%; Calcium lignin sulphonate: 0.5 ~ 0.7wt%; Newspaper fiber: 0.7 ~ 1wt%; A-Al
2o
3: 0.6 ~ 0.8wt%.The present invention adopts waste magnesia carbon brick to be that main raw material is to produce coating, the alternative traditional coating of its performance, products material cost reduces greatly, and has good erosion resistance, scour resistance and oxidation-resistance, has saved energy consumption, has reduced baking cost.Constant product quality of the present invention, not crackle, do not peel off, resistant to corrosion, resistance to erosion, easily turn over bag.
Description
Technical field
The present invention relates to field of metallurgy, the improvement of component of especially a kind of coating and preparation method thereof.
Background technology
Coating kind is a lot, and performance difference is very large, generally adopts bauxite chamotte, magnesia, olivine sand, synthetic magnesia-calcium clinker, passivation dolomite sand, passive lime stone sand, calcining olivine sand etc. to be main raw material.At present there is following shortcoming in coating on the market: product is not often paid close attention to and mated whether economical rationality between performance with concrete application conditions, there is " ability " waste of " wasting one's talent on a petty job " formula, material configuration selection leaves excessive factor of assurance, certain function is caused to have more than needed and waste of material, and the material cost of this series products is very high, conventional magnesia, bauxite clinker price are all more than 1500 ~ 1700 yuan/ton.Further, magnesia or forsterite etc. need the high bake process through more than 3 hours, consume mass energy, be unfavorable for energy-conserving and environment-protective, and have impact on production efficiency.
Summary of the invention
Object of the present invention solves the problems of the prior art exactly, and proposing a kind of take waste magnesia carbon brick as coating of main raw material and preparation method thereof, can saving resource and the energy, reduces costs.
For achieving the above object, the present invention proposes a kind of take waste magnesia carbon brick as the coating of main raw material, and each constituent mass per-cent is: waste magnesia carbon brick: 78 ~ 82wt%; Magnesia micro mist: 13.7 ~ 16.7wt%; Silicon powder: 2.3 ~ 2.7wt%; Tripoly phosphate sodium STPP: 0.1 ~ 0.2wt%; Calcium lignin sulphonate: 0.5 ~ 0.7wt%; Newspaper fiber: 0.7 ~ 1wt%; A-Al
2o
3: 0.6 ~ 0.8wt%.
As preferably, each constituent mass per-cent is: waste magnesia carbon brick: 80wt%; Magnesia micro mist: 15.2wt%; Silicon powder: 2.5wt%; Tripoly phosphate sodium STPP: 0.15wt%; Calcium lignin sulphonate: 0.6wt%; Newspaper fiber: 0.85wt%; A-Al
2o
3: 0.7wt%, this formula is optimum formula, has considered cost and product performance.
As preferably, described waste magnesia carbon brick comprises micro mist totally three kinds of specifications of the particle of 1 ~ 3mm particle diameter, the particle of 0.3 ~ 1mm particle diameter and 0.088mm particle diameter, and the mass percent of micro mist in whole coating of the particle of the particle of 1 ~ 3mm particle diameter, 0.3 ~ 1mm particle diameter and 0.088mm particle diameter is respectively: 25wt%, 40wt% and 15wt%, improve product performance further.
As preferably, each constituent mass per-cent is: waste magnesia carbon brick: 82wt%; Magnesia micro mist: 13.7wt%; Silicon powder: 2.4wt%; Tripoly phosphate sodium STPP: 0.1wt%; Calcium lignin sulphonate: 0.5wt%; Newspaper fiber: 0.7wt%; A-Al
2o
3: 0.6wt%, this formula is lower in cost control.
As preferably, each constituent mass per-cent is: waste magnesia carbon brick: 78wt%; Magnesia micro mist: 16.6wt%; Silicon powder: 2.7wt%; Tripoly phosphate sodium STPP: 0.2wt%; Calcium lignin sulphonate: 0.7wt%; Newspaper fiber: 1wt%; A-Al
2o
3: 0.8wt%, this performance formula aspect is more excellent.
As preferably, described magnesia micro mist adopts 92% magnesia, and described 92% magnesia adopts ball mill to be finely ground into 0.088mm particle diameter becomes magnesia micro mist, and improve product performance, and 92% magnesia is more common on the market, cost is low.
As preferably, described silicon powder adopts 92%SiO
2micro mist, more common, cost is lower.
As preferably, described newspaper fiber is dropped in pulverizer to pulverize by the old newsprint of recovery to form, and cost is low.
For achieving the above object, the invention allows for a kind of take waste magnesia carbon brick as the preparation method of the coating of main raw material, comprises the following steps successively:
A) waste magnesia carbon brick jaw crusher is broken into macrobead;
B) with roller crusher, the macrobead in step a is ground into the small-particle that particle diameter is 0.3 ~ 3mm;
C) from step b, selected part small-particle ball mill is finely ground into the micro mist that particle diameter is 0.088mm;
D) small-particle in step b is sieved by particle diameter difference, get the small-particle of 1 ~ 3mm particle diameter: 25wt%; The small-particle of 0.3 ~ 1mm particle diameter: 40wt%;
E) micro mist of the 0.088mm particle diameter in step c is taken: 15wt%;
F) 92% magnesia ball mill is finely ground into the magnesia micro mist that particle diameter is 0.088mm;
G) take batching, batching is by mass percentage: 92%SiO
2micro mist: 2.5wt%; Tripoly phosphate sodium STPP: 0.15wt%; Calcium lignin sulphonate: 0.6wt%; A-Al
2o
3: 0.7wt%;
H) by 92%SiO
2micro mist, tripoly phosphate sodium STPP, calcium lignin sulphonate and a-Al
2o
3pour forced stirrer stirring into and carry out pre-mixing in 28 ~ 32 minutes, after pre-mixing, be delivered to mixing system;
I) newspaper fiber is ground into by the old newsprint of recovery input pulverizer;
J) conveying belt is utilized to be sent in Preblend system PBS tank together with the magnesia micro mist in step f the small-particle in steps d, the micro mist in step e, batch mixing was delivered to mixing system after 6 ~ 8 minutes, and wherein during batch mixing, the mass percent of magnesia micro mist is: 15.2wt%;
K) after the material carried in the mid-h in steps and step j of mixing system, then add the newspaper fiber of the 0.85wt% in step I, stir in mixing system and carry out packing after 3 ~ 9 minutes and obtain coating finished product.
As preferably, in described step h, churning time is 30 minutes; In step j, mixing time is 7 minutes; In step k, churning time is 6 minutes, considers production efficiency and mixing effect.
Beneficial effect of the present invention: the present invention adopts secondary resource waste magnesia carbon brick to be that main raw material is produced and added skinning loam, the complete alternative traditional coating of its performance, no matter product is that construction or spreading property are all more excellent than product on market.Waste magnesia carbon brick coating can bear the high-temperature molten steel (1550 ~ 1650 DEG C) of more than 24 hours erosion, wash away, have good erosion resistance, scour resistance and oxidation-resistance.Because waste magnesia carbon brick lives through high temperature, baking time more than 2 hours during baking, can be shortened, save energy consumption, reduction baking cost more than 50%.The magnesia that conventional coating adopts, bauxite clinker price are all more than 1700 yuan/ton, and the waste magnesia carbon brick cost recycled is less than 400.00 yuan, less than 25% of convenient source.Constant product quality of the present invention, not crackle, do not peel off, resistant to corrosion, resistance to erosion, easily turn over bag.
Feature of the present invention and advantage will be described in detail by embodiment.
Embodiment
Embodiment one:
Take waste magnesia carbon brick as the coating of main raw material, each constituent mass per-cent is: 78 ~ 82wt%; Magnesia micro mist: 13.7 ~ 16.7wt%; Silicon powder: 2.3 ~ 2.7wt%; Tripoly phosphate sodium STPP: 0.1 ~ 0.2wt%; Calcium lignin sulphonate: 0.5 ~ 0.7wt%; Newspaper fiber: 0.7 ~ 1wt%; A-Al
2o
3: 0.6 ~ 0.8wt%.
Having considered after in cost and performance two, can choose an optimum formula, its each constituent mass per-cent is as follows respectively: waste magnesia carbon brick: 80wt%; Magnesia micro mist: 15.2wt%; Silicon powder: 2.5wt%; Tripoly phosphate sodium STPP: 0.15wt%; Calcium lignin sulphonate: 0.6wt%; Newspaper fiber: 0.85wt%; A-Al
2o
3: 0.7wt%, this formula is optimum formula, has considered cost and product performance.Described waste magnesia carbon brick comprise 1 ~ 3mm(comprise 1 and 3mm) particle of particle diameter, 0.3 ~ 1mm(comprise 0.3mm, do not comprise 1mm) particle of particle diameter and micro mist totally three kinds of specifications of 0.088mm particle diameter, and the mass percent of micro mist in whole coating of the particle of the particle of 1 ~ 3mm particle diameter, 0.3 ~ 1mm particle diameter and 0.088mm particle diameter is respectively: 25wt%, 40wt% and 15wt%.Magnesia micro mist adopts 92% magnesia, and described 92% magnesia adopts ball mill to be finely ground into 0.088mm particle diameter becomes magnesia micro mist, and 92% magnesia refers to that magnesian content is more than or equal to 92% of gross weight.Silicon powder adopts 92%SiO
2micro mist, refer to that dioxide-containing silica is more than or equal to 92% of gross weight, silicon powder can improve volume density, reduce apparent porosity, obviously gain in strength, silicon powder has very strong activity, colloidal particle is formed in water, add appropriate dispersion agent, its mobility can be strengthened, thus improve the performance of mould material.The fineness of this silicon powder can adopt 0.088mm particle diameter.Newspaper fiber is that the old newsprint of recovery is dropped into the paper fiber be ground in pulverizer, and its raw material sources are extensive, with low cost.A-Al2O3 powder is the aluminum oxide powder with a phase that commercial alumina generates through high-temperature calcination, can make the micro mist of different fineness after fully grinding.The molecular formula of calcium lignin sulphonate is: C20H24CaO10S2, soluble in water, has good stability.Calcium lignin sulphonate is referred to as wooden calcium, and be a kind of polycomponent high molecular polymer anion surfactant, outward appearance is brownish-yellow powder material, and slightly aromatic odour has very strong dispersiveness, cohesiveness, sequestering.
Take waste magnesia carbon brick as the preparation method of the coating of main raw material, comprise the following steps successively:
A) waste magnesia carbon brick jaw crusher is broken into macrobead;
B) with roller crusher, the macrobead in step a is ground into the small-particle that particle diameter is 0.3 ~ 3mm;
C) from step b, selected part small-particle ball mill is finely ground into the micro mist that particle diameter is 0.088mm;
D) small-particle in step b is sieved by particle diameter difference, take the small-particle of 1 ~ 3mm particle diameter: 25wt%; The small-particle of 0.3 ~ 1mm particle diameter: 40wt%;
E) micro mist of the 0.088mm particle diameter in step c is taken: 15wt%;
F) 92% magnesia ball mill is finely ground into the magnesia micro mist that particle diameter is 0.088mm;
G) take batching, batching is by mass percentage: 92%SiO
2micro mist: 2.5wt%; Tripoly phosphate sodium STPP: 0.15wt%; Calcium lignin sulphonate: 0.6wt%; A-Al
2o
3: 0.7wt%;
H) by 92%SiO
2micro mist, tripoly phosphate sodium STPP, calcium lignin sulphonate and a-Al
2o
3pour forced stirrer stirring into and carry out pre-mixing in 28 ~ 32 minutes, after pre-mixing, be delivered to mixing system; General pre-mixing 30 minutes;
I) paper fiber is ground into by the old newsprint of recovery input pulverizer;
J) utilize conveying belt to be sent in Preblend system PBS tank together with the magnesia micro mist in step f the small-particle in steps d, the micro mist in step e, batch mixing was delivered to mixing system after 6 ~ 8 minutes, and the mass percent of magnesia micro mist is: 15.2wt%; General batch mixing about 7 minutes;
K) after the material carried in the mid-h in steps and step j of mixing system, then add the newspaper fiber of 0.85wt%, carry out packing stir 3 ~ 9 minutes (general mixing about 6 minutes) in mixing system after and obtain coating finished product.
The coating that this formula and method are produced is under 110 DEG C of * 24h conditions, and each parameter value is: anti-folding>=0.5MPa, resistance to compression>=1.8MPa, volume density>=1.80g/cm
3; Under 1450 DEG C of * 3h conditions, each parameter value is: anti-folding>=1.2MPa, resistance to compression>=3.2MPa, volume density>=1.80g/cm
3, Linear change rate 0 ~ 0.62%.
Embodiment two:
With embodiment one unlike, in coating, each constituent mass per-cent is: waste magnesia carbon brick: 82wt%; Magnesia micro mist: 13.7wt%; Silicon powder: 2.4wt%; Tripoly phosphate sodium STPP: 0.1wt%; Calcium lignin sulphonate: 0.5wt%; Newspaper fiber: 0.7wt%; A-Al
2o
3: 0.6wt%, in this embodiment, the percent mass of waste magnesia carbon brick is higher, and the mass percent of other components as magnesia micro mist and silicon powder decreases, such benefit is because the cost of waste magnesia carbon brick is lower, only need to reclaim some outmoded magnesia carbon bricks, so such formulated coating is out lower in cost control.
Embodiment three:
With enforcement one unlike, each constituent mass per-cent in coating is: waste magnesia carbon brick: 78wt%; Magnesia micro mist: 16.6wt%; Silicon powder: 2.7wt%; Tripoly phosphate sodium STPP: 0.2wt%; Calcium lignin sulphonate: 0.7wt%; Newspaper fiber: 1wt%; A-Al
2o
3: 0.8wt%, the advantage of such formula is that the percent mass shared in relative embodiment one of magnesia micro mist and silicon powder is more, magnesia micro mist is anti-folding, withstand voltage, high strength, air hardening, gelling material, can improve the performance of coating, and silicon powder has very strong activity, colloidal particle is formed in water, add appropriate dispersion agent, its mobility can be strengthened, thus improve the performance of mould material, so add the proportion of these components, the performance in the actual use of coating can be promoted.
Above-described embodiment is to explanation of the present invention, is not limitation of the invention, anyly all belongs to protection scope of the present invention to the scheme after simple transformation of the present invention.
Claims (2)
1. be a coating for main raw material with waste magnesia carbon brick, it is characterized in that: each constituent mass per-cent is: waste magnesia carbon brick: 80wt%; Magnesia micro mist: 15.2wt%; Silicon powder: 2.5wt%; Tripoly phosphate sodium STPP: 0.15wt%; Calcium lignin sulphonate: 0.6wt%; Newspaper fiber: 0.85wt%; α-Al
2o
3: 0.7wt%, described waste magnesia carbon brick comprises micro mist totally three kinds of specifications of the particle of 1 ~ 3mm particle diameter, the particle of 0.3 ~ 1mm particle diameter and 0.088mm particle diameter, and the mass percent of micro mist in whole coating of the particle of the particle of 1 ~ 3mm particle diameter, 0.3 ~ 1mm particle diameter and 0.088mm particle diameter is respectively: 25wt%, 40wt% and 15wt%, described silicon powder is 92%SiO
2micro mist, the preparation method of this coating is as follows:
A) waste magnesia carbon brick jaw crusher is broken into macrobead;
B) with roller crusher, the macrobead in step a is ground into the small-particle that particle diameter is 0.3 ~ 3mm;
C) from step b, selected part small-particle ball mill is finely ground into the micro mist that particle diameter is 0.088mm;
D) small-particle in step b is sieved by particle diameter difference, get the small-particle of 1 ~ 3mm particle diameter: 25wt%; The small-particle of 0.3 ~ 1mm particle diameter: 40wt%;
E) micro mist of 0.088mm particle diameter is taken: 15wt%;
F) 92% magnesia ball mill is finely ground into the magnesia micro mist that particle diameter is 0.088mm, 92% magnesia refers to that magnesian content is greater than or equal to the magnesia of gross weight 92%;
G) take batching, batching is by mass percentage: 92%SiO
2micro mist: 2.5wt%; Tripoly phosphate sodium STPP: 0.15wt%; Calcium lignin sulphonate: 0.6wt%; α-Al
2o
3: 0.7wt%, 92%SiO
2micro mist refers to that dioxide-containing silica is more than or equal to the SiO of gross weight 92%
2micro mist;
H) by 92%SiO
2micro mist, tripoly phosphate sodium STPP, calcium lignin sulphonate and α-Al
2o
3pour forced stirrer stirring into and carry out pre-mixing in 28 ~ 32 minutes, after pre-mixing, be delivered to mixing system;
I) newspaper fiber is ground into by the old newsprint of recovery input pulverizer;
J) utilize conveying belt to be sent in Preblend system PBS tank together with the magnesia micro mist in step f the small-particle in steps d, the micro mist in step e, batch mixing was delivered to mixing system after 6 ~ 8 minutes, and the mass percent of magnesia micro mist is: 15.2wt%;
K) after the material carried in the mid-h in steps and step j of mixing system, then add the newspaper fiber of 0.85wt%, stir in mixing system and carry out packing after 3 ~ 9 minutes and obtain coating finished product.
2. a kind of as claimed in claim 1 take waste magnesia carbon brick as the coating of main raw material, it is characterized in that: in described step h, churning time is 30 minutes; In step j, mixing time is 7 minutes; In step k, churning time is 6 minutes.
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| CN106278298A (en) * | 2016-07-14 | 2017-01-04 | 武汉钢铁股份有限公司 | Separator material for casting residue slag pot grid and preparation method thereof |
| CN110550961A (en) * | 2019-10-18 | 2019-12-10 | 湛江市红鹰铭德新材料科技有限公司 | Method for preparing tundish coating by recycling waste magnesium slag trap |
| CN111233500B (en) * | 2020-03-13 | 2022-06-03 | 浙江欣辉耐火材料股份有限公司 | Phosphorus-free low-silicon magnesium coating and preparation method thereof |
| CN113912403A (en) * | 2021-09-06 | 2022-01-11 | 海城利尔麦格西塔材料有限公司 | Low-cost grouting material for back of cooling wall of blast furnace |
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| CN101284736A (en) * | 2008-05-20 | 2008-10-15 | 攀枝花顺腾集团冶金材料有限公司 | Antisticking coating mixture for steel-smelting and preparation method threreof |
| US8062577B2 (en) * | 2009-04-10 | 2011-11-22 | Edw. C. Levy Co. | Alumina taphole fill material and method for manufacturing |
| CN102674850B (en) * | 2012-04-16 | 2013-09-25 | 莱芜钢铁集团有限公司 | Magnesium-carbon coating used for fixing weirs and dams of tundish of continuous caster and construction method of magnesium-carbon coating |
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