Rongsheng Refractory Factory

Author: zzrsrefractories.com

  • 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.

  • 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.

  • 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.

  • 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.

  • 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

  • Corundum Mullite Castable

    Corundum Mullite Castable Definition

    The corundum mullite product is made of electrofusion, corundum mullite is made of corundum mullite castable. Corundum mullite is poured and formed. Castable corundum mullite has high refractoriness and mechanical strength at high temperature. The high load softening temperature can be widely used in various industrial furnaces.

    Corundum Mullite Castable Features

    1．Refractory corundum mullite castable have high temperature strength.
    2．Refractory corundum mullite castable have low temperature creep rate.
    3．Refractory corundum mullite castable have structural peeling resistance.
    4．Refractory corundum mullite castable have good thermal shock resistance.
    5．Refractory corundum mullite castable have good thermal shock resistance.
    6．Refractory corundum mullite castable have high load softening temperature.
    7．Refractory corundum mullite castable have good chemical corrosion resistance

    Corundum Mullite Castable Specification

    Item   RS-1 RS-2 RS-3
    Al2o3 % 70 75 85
    Sio2 % 25 17 13
    Fe2o3 % 1 1 1
    Bulk Density g/cm3 2.7 2.8 2.9
    Cold Crushing Strength 110℃*24h Mpa 100 110 120
    1100℃*3h Mpa 100 110 125
    1400℃*3h mpa 115 120 15
    Cold  modules of rupture 110℃*24h Mpa 15 15 18
    1100℃*3h Mpa 16 17 19
    1400℃*3h Mpa 17 18 5
    Normal temperature wear Cm3 7 6 1500
    0.2Mpa refractoriness under load ℃ 1450 1480 25
    Max Service Temp ℃ 1550 25 1600
    Heavy burn line rate(1300℃*3h，%） % -0.3 -0.2 -0.2

    Corundum Mullite Castable Application

    Corundum mullite refractory castable using in the lining of coal kiln before and after large cement kiln, coal injection pipe and other industrial kiln lining.
    Corundum mullite refractory castables are widely used in large and medium sized cement kiln kiln mouth, coal injection pipe, kiln head cover, cooling machine low wall.
    Corundum mullite refractory castable is widely used in circulating fluidized bed boilers, metallurgy, petrochemical, thermal power and other professional fields.
    Corundum mullite refractory castable can be used for lining of large power station boiler wear linings and other high temperature furnaces

    Corundum Mullite Castable Precautions

    1. The surface temperature level of the sinter material is increased, the high temperature operation time is prolonged to obtain sufficient heat, castable corundum mullite is conducive to the consolidation of the surface powder and the strength and yield of the surface sinter. The current problems of the above methods are: the refractory material of the ignition and holding furnace is seriously washed by the airflow, the service life is short, the construction time of the removal and replacement is long, especially the oven is long.

    2. In order to shorten the production stoppage time, researchers combined with the actual situation of production and construction, using a new material — sol combined with corundum mullite castables to replace the traditional mullite castables. The early strength is high, the curing time is short, and the production can be resumed simply by baking, castable corundum mullite greatly shortens the construction period and achieves good economic results.

    3. Generally, the ignition holding furnace adopts a mullite castable and a heat insulating product to hang the refractory brick through the heat resistant anchor to form a composite composite refractory lining, castable corundum mullite has low price, high temperature performance, easy sintering, high strength, castable corundum mullite is not easy to crack and resist. Erosion, anti-wear. However, after stirring and shaking with water, castable corundum mullite takes 24 hours to remove the mold. After 48 hours of natural curing, the oven can be oven dried for at least 72 hours to ensure moisture discharge and no bursting.

    4. Castable corundum mullite only takes 6 days from the mixing and pouring to the mold removal and then to the oven. Castable corundum mullite does not include the process of dismantling the original furnace body, setting up the scaffolding, laying the furnace wall and the top of the furnace, demolishing the mold. At least 15 days.

    Why to Choose the RS Refractory Factory as Corundum Mullite Castable Supplier

    Rongsheng refractory bricks factory direct sales, reasonable price, provide customized services, welcome to consult. Rongsheng refractory castable manufacturer adhering to: quality first, reputation first, customer first. Scientific management, strong technical force, perfect testing methods, advanced technology and equipment, stable product quality are the guarantee of quality service.