Refractories for metallurgy, smelting and chemical

Refractories for metallurgy, smelting and chemical

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Magnesia brick

This product is fired at high temperature. It is the most important product in alkaline refractories. It has

high refractoriness and is good for iron oxide, alkaline slag and high calcium flux

It is widely used in metallurgical kilns because of its good corrosion resistance.

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Magnesia alumina spinel brick

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Fired magnesia chrome brick

The production process of fired magnesia chrome brick is similar to that of magnesia brick. Its main charac

teristics are: lowporosity, high compressive strength, load softening temperature and flexural strength,Slag

resistance and high temperature strength are better than other magnesia chrome bricks. The products are

mainly usedin open hearth furnace top, electric furnace top, refining furnace and all kinds of nonferrous

metal smelting furnace inindustry,In addition, it is also used in the burning zone of cement rotary kiln and

the regenerator of glass kiln.


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High load soft brick

The product has the characteristics of high load softening temperature and strength, good thermal shock

stability and superior wear resistance. It is mainly used in high temperature parts of large and medium-sized

rotary kilns to replace magnesia chrome bricksIt is also suitable for electric furnace, converter and other main

parts in metallurgical industry.


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Kyanite high aluminum products

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Red pillar stone brick

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Top brick (arch foot brick) for electric furnace and various blast furnaces in metallurgical industry

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High alumina unfired furnace top brick

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Castables for ladle working layer

Corundum spinel monolithic castable is an amorphous product with corundum as the main raw material,

some spinel or magnesia as the raw material, and cement or micropowder as the binder,It has good integrity

, corrosion resistance and thermal shock stability.


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Pyrophyllite brick for ladle

performance

index

PY-75

PY-80

PY-82

Apparent porosity AP%

≤15

≤15

≤15

Bulk density BD g / cm3

2.2

2.2

2.2

Compressive strength CCS MPa

30-40

35-45

35-45

Refractoriness (℃)

1630

1650

1650

Load softening temperature rul ℃

1400

1450

1450

Chemical composition%

SiO2

≥75

≥80

≥82

Fe2O3

≤0.5

≤0.5

≤0.5

K2O+Na2O

0.48

0.48

0.48

AL2O3

15-20

≥13

≥12



Refractory for tundish permanent layer

High aluminum castable is an amorphous product with high alumina mullite as raw material and cement or

micro powder as binder. It has high strength, especially high medium temperature strength and good thermal

shockThe characteristics of the system.The use of high alumina mullite and aluminum zirconium in tundish

instead of high aluminum castable can significantly improve the service life and improve the safety of tundish.


project
High alumina castable
High alumina mullite preform
Aluminum zirconium preform
Bulk density (g / cm3)
CHA-2A
CHM-4SB
LZ-1A
110℃×24h
2.68
2.85
Fire resistance
110℃×24h
64.5
60.5
1500℃×3h
85.7
≥70
Flexural strength (MPA)
110℃×24h
7.0
1500℃×3h
12.0
12
Residual linear expansion (%)
1500℃×3h
+0.48
+0.25
Chemical composition (%)
Al2O3
68.50
80
ZrO2
SiO2
15.60
7.35
Application site
Side wall
Non slagline
Slag line


Clay brick

                       Brands
performance
NZ-45
NZ-40
Al2O3,%≥
45
40
Refractoriness, ℃
1750
1730
Load softening temperature rul, t0.6, ℃
1400
1350
Reburning line change (1400 ℃) × 2h),%
-0.4~+0.1
-0.5~+0.1
Apparent porosity,%
22
24
Compressive strength CCS, MPa
30
25
Thermal shock resistance
Excellent


Low porosity clay brick

                                            Brand
performance
DN-1
DN-2
Apparent porosity,%
16
20
Bulk density BD, g / cm3
≥2.37
≥2.30
Compressive strength CCS, MPa
≥68
≥58.8
Refractoriness, ℃
≥1730
≥1730
Load softening temperature rul, t0.6, ℃
≥1500
≥1470
Reburning line change,%
-0.5
-0.5
Chemical composition%
Al2O3
55
Fe2O3
<1.5
SiO2
35


Refractory castables for various heating furnaces

                     Brands
Performance properties
clay bonded castabIe refractories
Cement bonded refractory castable
NL-70
NL-60
NN-45
GL-85
GL-70
GL-60
Al2O3,%, not less than
70
60
45
85
70
60
Fire resistance, ℃ not less than
1760
1720
1700
1780
1720
1700
Test temperature with linear change rate less than ± 1% (holding for 3 h), ℃
1450
1400
1350
1500
1450
1400
The medium strength MPa of 110 ℃ drying pressure is not less than
20
20
20
45
45
40
The compressive strength MPa after burning at 1350 ℃ is not less than
50
40
40
60
55
50
The bending strength (MPA) after drying at 110 ℃ shall not be less than
4
3
2.5
5.5
5
4
Unit weight g / cm3
2.4
2.3
2.2
2.5
2.4
2.35


Unshaped refractory

                   project
performance
Non drying ramming material for iron ditch
Blast furnace sludge
1#
2#
Al2O3,%
60
65
SiO2,%
/
/
SiC,%
13
13
Bulk density (110 ℃) × 24h)BD,g/cm3
≥2.3
≥2.4
Flexural strength mpamor
110℃×24h
3
1450℃×3h
5
Compressive strength mpaccs
110℃×24h
8
1450℃×3h
15
Line rate of change, PLC,%
±0.5
±0.5
Apparent porosity,%
/
/


alumina-magnesia refractory castables

This product is made of high bauxite clinker as aggregate, high bauxite clinker and magnesia mixed co grinding

powder as powder, and sodium silicate as binder. It can be used as steel barrelIntegral lining of ladle and tapp

ing tank.


                                  Brands
Performance properties
LMJ-70
LMJ-65
Chemical composition,%
Al2O3
70
MgO
8
Bulk density BD (110 ℃) × 24h),g/cm3
2.6
2.5
Linear change rate PLC ≤ (110 ℃) × 24h),%
-0.4
-0.4
Flexural strength mor (110 ℃) × 24h),Mpa
5.5
5.5
Compressive strength CCS, (110 ℃) × 24h),Mpa
40
30
Maximum service temperature, ℃
1720
1700


Tundish coating

Performance
index
MgO,%
80
CaO,%
1
bulk density,110℃×16h
2.1±0.2
Compressive strength,Mpa,110℃×16h
≥4
(CCS)1500℃×3h,Mpa
6
Linear rate of change,1500℃×3h
-0.20.5
Construction water addition,%
26~27±3


Magnesia ramming material

Performance
index
MgO,%
95
CaO,%
1
SiO2,%
2.8
Bulk density, apparent porosity1000℃×24
24
Compressive strength Mpa
1100℃×24h
1500℃×3h
Flexural strength, 1500 ℃ MPa
8


Acid dry vibrating material for tundish

Performance
index
SiO2,%
≥87
Burn reduction,%
≤5.0
Fire resistance,℃
≥1690
thermal conductivity,1000℃,W/m.k
≤0.4
bulk density,g/cm3
1.5±0.1
Flexural strength,240℃×3h
≥2.5
Residual moisture,%
0


Ladle castables

   

index

Brand

texture of material

chemical composition

≥,%

bulk density

g/cm3

Flexural strength Mpa
Compressive strength Mpa
Linear change rate% 1600 ℃ × 3hr
DNC-90
Corundum spinel
Al2O3+MgO
90
3.0
5.0
10
25
DNC-85
Corundum spinel
Al2O3+MgO
85
3.0
5.0
10
25
DNC-85A
Alumino magnesian
Al2O3+MgO
85
3.0
5.0
10
30
DNC-80
High alumina spinel
Al2O3+MgO
80
2.7
5.0
10
30


Magnesia based dry vibration material for tundish

Performance
Indicators
MgO,%
≥76
CaO,%
≥15.5
bulk density   g/cm3
110℃×24h
1600℃×3h
Flexural strength,1500℃×3h Mpa
≥4.4
Linear rate of change,1600×3h
-1.2


Corundum products

This product uses fused corundum sand, pure alumina fine powder as the main raw materials, and is made by

mechanical molding, high temperature sintering and other processes. Products with high temperature resistance

, corrosion resistance, thermal shockIt is suitable for petrochemical industry, large and medium ammonia gasifier

and gasifier, steel rolling heating furnace bottom, tapping tank, all kinds of high temperature electric furnace

and molybdenum tungsten wire high temperature furnaceIt can also be used as auxiliary materials in high

temperature, such as sagger, kiln car brick, etc.


                             Brands
        Properties
GY-85
GY-95
Chemical composition
Al2O3   %
≥85
Fe2O3   %
≤0.5
Apparent porosity,%
≤21
≤20
Bulk density BD, g / cm3
3.0
3.2
Refractoriness, ℃
1790
1790
Compressive strength CCS, MPa
≥80
80-90
Starting temperature of softening under load rul, ℃
≥1530
≥1550
Reburning line change,% (1500 ℃) × 3h)
0.3
0.2


Gunning (coating) material, coating material

                           Product name
Physical and chemical index
Magnesium gunning coating
High aluminum gunning coating
MgO,%
≥90
Al2O3,%
2.5
≥65
Fe2O3,%
≤2.0
Bulk density BD (after firing at 1200 ℃), g / cm3
≥2
2
Fire resistance, ℃
1780
1600
Flexural strength Mpa
110℃Drying (hot state)
≥4
1200℃After burning
0.5
1400℃After burning
Heating line change,%
1200℃×3h
±1.0
1400℃×3h
Maximum service temperature, ℃
1450
1400


The above two kinds of gunning coatings are suitable for various furnace combustion chambers, regenerators,

inner walls of various hot air pipes, blast furnaces and hot air stoves in metallurgical industry as repairing and

protective layers.


Semi silicon brick for electrolyzer


performance
index
bulk density,g/cm3
2.2
Apparent porosity,%
16-20
Compressive strength,Mpa
30-35
Fire resistance,℃
1550-1600
Load softening temperature,℃
1320-1350
Linear change rate 1000 ℃ × 2h,%
±0.2
SiO2,%
65-70
AL2O3,%
≥20
Fe2O3,%
≤1.5
Semi silicon brick is used in aluminum electrolytic cell, which has the function of good heat preservation and heating. It can make the electrolytic cell keep stable heat preservation and constant temperature, make the liquid aluminum not easy to form fast and coke, keep the liquid aluminum unblocked, and ensure the quality of aluminum.


Coke oven cylinder brick


performance
index
Room temperature compressive strength,Mpa
≥50
Apparent porosity,%
14.5
bulk density,g/cm3
2.15-2.2
Water absorption,%
≤7
SiO2,%
68
Fe2O3,%
5
Water absorption the material is mainly used for coke oven roof, coke cooling platform, coke quenching tower lining, coke storage bin and so on.


Zhejiang Xiangfa Refractories Co., Ltd
Main products: chrome corundum brick, zirconium mullite brick, mullite anti-corrosion brick, corundum brick, high alumina brick, silicon carbide brick, pyrophyllite brick, semi silica brick, wear-resistant castable, high strength low cement castable, anti-corrosion castable, self flow castable, plastic castable, and various brands of shaped and unshaped refractories.
Mobile: 13906823738          Tel: 0572-6011576
Tel: 0572-6011516             Contact email: hyx@chinarefractory.com
Contact address: 1 km away from Changxing west exit of Shensu Zhejiang Anhui Expressway (9 km away from old 318 National Road)