Jun 30, 2021
Sillimanite Bricks

Sillimanite Bricks Production Craft

Slurry casting method produced sillimanite bricks adopt natural sillimanite, synthesized mullite, high alumina clinker and so on as raw materials. Gypsum mould is made according to products shapes, and slurry used for casting is prepared based on technical parameters. After casting, green sillimanite bricks should be dried before high temperature sintering.

Sillimanite Bricks Physiochemical Indexes

Item GXSZ-1 GXSZ-2 GXSZ-3 GXSZ-4
Al2O3 % 56.4 59.3 64.5 65.5
Fe2O3 % 0.96 0.80 1.0 0.71
SiO2 % 39.5 38.1 33.4 31.9
CaO % 0.28 0.08 / /
K2O % 0.51 0.24 0.4 0.46
Bulk density g/cm3 2.36 2.34 2.58 2.32
Apparent porosity % / 20.8 16.2 21.8
Refractoriness s under load ℃ / 1620 1650 1570
Modulus of rupture Mpa / 60 70 /
Thermal expansion coefficient % / 5.5 6 6.6

Sillimanite Bricks Applications

Sillimanite bricks have better physiochemical properties than high alumina bricks, they are mainly used in glass tank furnace throat, blast furnace lining, furnace throat, ceramics industry kiln furniture and so on. As sillimanite bricks have good high temperature thermal stability, good resistance to glass liquid corrosion, low pollution to glass liquid, they are usually used at glass industry feeding canister, feeder, tube drawing machine and other equipment, production efficiency are significantly improved. Sillimanite bricks series products mainly include: feeder bricks, feeding canister, rotating tube, feeder nose, feeder bowl, former block, slag skimmer block, shutter block, front arch bricks, back arch bricks, feeder nose cover, burner nozzle bricks, cover plate and so on.

 

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Jun 30, 2021
Andalusite Bricks

The grading formulation of andalusite bricks

Item Granularity Percent
Andalusite 1~3mm 0~50%
0.088~1mm 15~25%
<0.088mm 15~28%
Mulllite 1~3mm 0~50%
Flint clay 1~3mm 0~50%
Synthesized cordierite <0.088mm 0~10%
Magnesia micro powder   1~3%
Alumina micro powder   2~8%
Sooth silica   3~10%
Water reducer   0.01~0.1%

Production process of andalusite bricks

Batch materials of andalusite bricks should be prepared as per formula, then after mixing and tempering, green bricks are made by mold pressing method. Then through drying and high temperature sintering, andalusite bricks are finally produced.

Andalusite Bricks Physiochemical Indexes

Item HZSZ-1 HZSZ-2 HZSZ-3
Al2O3 % ≥ 60 56 52
Fe2O3 % ≤ 1.0 1.2 1.3
Refractoriness ℃ >1790 >1790 >1790
Apparent porosity % ≤ 18 18 20
Bulk density g/cm3 ≥2.45 ≥2.45 ≥2.45
Refractoriness  under load (0.2Mpa) ℃  ≥ 1680 1650 1600
Reheating linear change rate(1500℃, 3h) +0.2~-0.1 +0.2~-0.1 +0.2~-0.1
Crushing strength Mpa ≥ 50 45 40
Creep rate % ≤ 0.8 0.8 0.8
Thermal shock stability (1100℃,water cooling) /times ≥20 ≥20 ≥20

Andalusite bricks applications

Andalusite bricks are premium refractory bricks with very good high temperature performance, such as wearing resistance, thermal shock resistance, excellent volume stability and strong corrosion resistance. In glass furnaces, andalusite bricks are a good replacement of sillimanite bricks. The main applications of andalusite bricks in float glass furnaces are tin bath roof cover, domestic and special glass kiln forehearth, feeder, tube drawing machine and other equipment. Andalusite bricks are also widely used in blast furnaces and hot blast furnaces, torpedo tank and so on.

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Jun 30, 2021
Acid Resistant Bricks

The Properties of Acid Resistant Brick

1. Can form corrosion resistant material during production.
2. Good acid and alkali corrosion resistance.
3. Low water absorption rate.
4. Good oxidization resistance at room temperature.

Acid Resistant Brick Physicochemical Index

Item Index
SiO2 69.8%
Al2O3 22.5%
K2O 2.7%
Na2O 0.95%
CaO 0.82%
MgO 0.12%
FeO 0.49%
Acid fastness 99.86
Bulk density 2.31~2.4g/cm3
Water absorption ≤2.0%
Modulus of rupture ≥58.8Mpa
Crushing strength ≥120Mpa

Lightweight Acid Resistant Brick Physiochemical Indexes

Index Special acid-proof brick Lightweight acid-proof brick
SiO2(%) ≥ 65 65
Bulk Density(g/m³) 1.6-1.8 1.0-1.3
Cold Crushing Strength(Mpa) ≥ 15 10
Thermal Conductivity(W/m.k)  ≤ 0.65 0.45
Water Absorption(%)  ≤ 15 working face 5
Acid-proof rate(%)  ≤ 98 97
Service temperature( ℃)  ≤ 1000 1000

The Application of Acid Resistant Bricks

Acid resistant bricks are widely used in petrol industry, chemical industry, metallurgy, power plant, chemical fiber, paper industry, pharmacy, fertilizer, food, galvanization factory, as well as acid tower, tank, bath, groove and other corrosion resistant projects. Acid resistant porcelain bricks are also used at sewage pipe and outdoor grounds.

Lightweight acid resistant bricks are mainly used at acidic atmosphere which suffers acidic gases corrosion, such as CFB boiler chimney, coking oven chimney and flue, etc. Lightweight acid resistant bricks should not contact with acidic liquid directly.

We specialize in refractory products for nearly 20 years, covering a full range of Graphite Electrode, High Alumina Bricks, Sillica Bricks, Fused AZS 33/36/41 Bricks, Mullite JM 23/26/28/30 Bricks, Magnesia Bricks, Magnesia Chrome Bricks, Magnesia Carbon Bricks, SiC Bricks, Dense and Light Weight Insulaing Castables and other related products for more sophisticated applications.

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Jun 30, 2021
Alkali Resistant Bricks

Alkali resistant bricks properties

Excellent resistance to alkali corrosion.
Long service life.
Low porosity.
High hot strength.
Good thermal shock resistance.
Good abrasion resistance.

Alkali resistant bricks physiochemical indexes

Item RSRK-35 RSRA-40T
Al2O3 % 35~45 38~42
SiO2 % 50~55 52~56
Fe2O3 % ≤2 1.5
Bulk density g/cm3 2.0~2.1 2.2~2.35
Apparent porosity % ≤16 12~15
Cold crushing strength MPa ≥60 ≥50
Refractoriness under load (0.2MPa) ℃ ≥1350 ≥1320
Thermal shock resistance (950℃, air cooling) /times ≥80 >50

Alkali resistant bricks applications

The main application field of alkali resistant bricks is cement kiln. Alkali resistant bricks used in cement kilns are classified into ordinary alkali resistant brick, high strength alkali resistant brick, arch top type alkali resistant brick, insulating alkali resistant brick, etc. High strength alkali proof bricks are mainly used at cement kiln preheater, decomposition furnace, tertiary air duct, vertical ascending flue, cyclone cylindrical part and conic part. Arch top type alkali resistant bricks are mainly used at cement kiln preheater, decomposition furnace tertiary air duct and so on. Alkali resistant insulating bricks are mainly used at cement kiln discharge end, kiln hood, cooler, etc..

We specialize in refractory products for nearly 20 years, covering a full range of Graphite Electrode, High Alumina Bricks, Sillica Bricks, Fused AZS 33/36/41 Bricks, Mullite JM 23/26/28/30 Bricks, Magnesia Bricks, Magnesia Chrome Bricks, Magnesia Carbon Bricks, SiC Bricks, Dense and Light Weight Insulaing Castables and other related products for more sophisticated applications.

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Jun 30, 2021
Low Porosity Clay Bricks

Fire Clay Brick Applications

Fireclay bricks are often used in the Metallurgy, building materials, chemical industry, petroleum, machinery manufacturing, silicate, power and other industries.

Shape Brick Material Alumina Cement
Al2O3 Content (%) 30% Refractoriness(SK) 32
Cold Crushing Strength (MPa) 25 Bulk Density(g/m3) 2.05
Porosity 2.10-2.15 Thermal Expansion At 1000°C (%) 0.6
Size Customized  

Fire Clay Brick Physical & Chemical Indicators

Fire Clay Brick SK-32
Item Standard
AI2O3(%) 30
Fe2O3 (%) 3
Refractoriness (SK) 32
Refractoriness under load, 0.2MPa, Ta, ((°C) 1300
Porosity (%) 22-26
Bulk density (g/cm³) 2.05
Cold crushing strength (MPa) 25
Thermal expansion at 1000°C (%) 0.6
Fire Clay Brick SK-34  
Item Standard
AI2O3(%) 38
Fe2O3 (%) 2.5
Refractoriness (SK) 34
Refractoriness under load, 0.2MPa, Ta, ((°C) 1350
Porosity (% 19-23
Bulk density (g/cm³) 2.10-2.15
Cold crushing strength (MPa) 25
Thermal expansion at 1000°C (%) 0.6
Fire Clay Brick SK-36  
Item Standard
AI2O3(%) 50
Fe2O3 (%) 2
Refractoriness (SK) 36
Refractoriness under load, 0.2MPa, Ta, ((°C) 1450
Porosity (% 20-24
Bulk density (g/cm³) 2.30-2.40
Cold crushing strength (MPa) 45
Thermal expansion at 1000°C (%) 0.3

Fire Clay Brick of Furnace Photos for Different Type

customized fireclay brick low porosity 2

Fire Clay Brick of High Temperature Furnace Packaging & Shipping

Heavy dense fire clay bricks are packed on wooden pallet with papers in each layer and PP film wrapped outside of the whole pallet.

customized fireclay brick low porosity 3

Fire Clay Brick Manufacturer from China Refractory Material Factory – RongSheng

Zhengzhou Rongsheng Refractory Material Co., Ltd. is located in the hinterland of Central Plains, at the foot of Songshan Mountain, and adjacent to Zhengshao Highway, Longhai and Jingguang railways. The convenient transportation, abundant resources and high quality minerals provide favorable conditions for the production of refractory materials.

Established in the early nineties of twenty century, with continuous innovation and development, now it is a comprehensive enterprise in refractory material sindutry, covering metallurgy, building materials, electric power, chemical industry etc.

Our main products: refractory material for industrial furnaces, such as high-alumina brick, refractory fire clay brick, silicon brick, high-strength diatomite brick, light weight insulation brick, low iron mullite brick, etc;anti-stripping alumina brick,alkali proof brick,phosphate brick for cement industry; For the  industrial furnace and power boiler, we can provide various series of abrasive bricks,corundum brick, mullite brick, wear resistant castable, corundum castable , high strength low cement castable, impervious material,plastick refractory, etc. Our products are popular in the whole country and have been exported to India, Iran.etc.

RS refractory company adhering to the ” integrity, innovation, hard work” and business philosophy,the ” people-oriented” as the cornerstone of enterprise development, to ” the pursuit of excellence” as the core values of the enterprise, will create ” Rongsheng Brand” as a corporate strategic objectives.and product types rich scientific management processes, improve customer information management system, timely, efficient, to provide satisfactory service to our users.

FAQ

1. Are you a manufacture or trading company ?
Factory+ trade(mainly factories, at the same time, we operates other related products)

2. Can we visit your factory ?
Sure,welcome at any time, seeing is believing.

3. Is your company accept customization ?
We have own factory and excellent technical team, and we accept OEM service

4. What’s the MOQ of trial order ?
No limit, we can offer the best suggestions and solutions according to your condition.

5. Will your company supply samples ?
Yes, we do. The shipping charges should be undertaken by customer.

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Jun 30, 2021
Low Creep Clay Bricks

The chemical and mineral composition of clay brick. Clay bricks usually contain 30%~48% of Al2O3, 50%~65% of SiO2, and a little amount of alkali metals, alkaline earth metal oxides(TiO2, Fe2O3, etc). The mineral compositions of fireclay bricks are: mullite, cristobalite, quartz and glass phase.

The refractoriness of clay bricks is usually between 1580~1750℃, the higher Al2O3/SiO2 ratio, the higher the refractoriness. When there are more low melting point impurities, the refractoriness of the products significantly decreases.

The refractoriness under load temperature of fireclay brick is about 1250~1450℃, the variation range is very large. Deformation beginning temperature is relatively low, temperature difference between 40% deformation is about 200~250℃.

Clay brick has very low thermal expansion rate, 20~1000℃ average linear expansion rate is 4.5~6*10-6 /℃. Chamotte brick also has relatively low thermal conductivity.

Clay brick has good thermal shock resistance, but the fluctuation scope is very large. 1100℃ water cooling recycling tests is usually higher than 10 times, that’s because clay bricks have low thermal expansion coefficient, there is no significant crystal transfer at high temperature, and have plasticity at high temperature.

Chemical corrosion resistance. clay brick is weak acid refractory, it has good acid slag corrosion resistance, but weak resistance to basic material corrosion.

The Applications of Clay Bricks

Clay bricks has relatively good acid slag corrosion resistance, so they are suitable for the masonry of acidic kiln working lining. Since the chemical composition and mineral phases of clay bricks varies significantly, their high temperature performance differs greatly, so as their application.

Glass Kiln clay blocks

Glass kiln large scale clay bricks are clay blocks used to mason glass kiln, unit weight is no less than 50 kg.

Glass kiln large scale clay bricks physicochemical index

Item GCB-40a GCB-40b
Al2O3% ≥ 40 40
Fe2O3 % ≤ 1.5 1.8
RUL 0.2 Mpa ℃ ≥ 1450 1400
Reheating linear change(1400℃, 2h) 0~-0.4 0~-0.4
Apparent porosity% ≤18 ≤18
Cold compression strength Mpa ≥ 49 34.3

Clay bricks used in blast furnace should have high cold crushing strength and endure the abrasion of material loading, have small volume shrinkage under long term high temperature working condition, low apparent porosity, low Fe2O3 content, etc.

Blast Furnace Clay Bricks Physicochemical Index

Item BZCB-42 BCB-42
Al2O3% ≥ 42 42
Fe2O3 % ≤ 1.7 1.7
Refractoriness ℃ 1750~1770 1750~1770
RUL 0.2 Mpa ℃ ≥ 1450 1430
Reheating linear change(1450℃, 3h) 0~-2 0~-3
Apparent porosity% ≤15 ≤16
Cold compression strength Mpa ≥ 58.8 49.0

Hot Blast Furnace Clay Bricks

Hot blast furnace clay bricks should have good thermal shock resistance, high rupture under load temperature, low creep. Hot blast furnace clay bricks are mainly used in regenerator chamber, partition wall and so on.

Hot blast furnace clay bricks physicochemical index

Item HCB-42 HCB-40 HCB-36
Al2O3% ≥ 42 40 36
Refractoriness ℃ 1750~1770 1730~1750 1690~1710
RUL 0.2 Mpa ℃ ≥ 1400 1350 1300
Reheating linear change (1450℃, 3h)0~-0.4 (1350℃, 3h)0~-0.3 (1350℃, 3h)0~-0.5
Apparent porosity% ≤24 ≤24 ≤25
Cold compression strength Mpa ≥ 29.4 24.5 19.6
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