Rongsheng Refractory Factory

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  • RTO/RCO Honeycomb Ceramics (For VOCS Waste Gas Treatment Incinerators)

    RTO refers to the regenerative thermal oxidation technology, and the English name is “Regenerative Thermal Oxidizer”. RTO regenerative thermal oxidation recovers heat by adopting a new unsteady heat transfer method. The principle is to heat the organic waste gas above 760℃to oxidize and decompose VOC in the exhaust gas into CO2 and H2O. The high-temperature gas generated by the oxidation flows through the special ceramic regenerator, and the ceramic body is heated and “heat-storing”, and the heat storage is used for preheating the organic exhaust gas that is subsequently introduced, thereby saving the fuel consumption of the exhaust gas heating. RTO technology is suitable for the treatment of low and medium concentration ( 100-3500mg/m2 ) waste gas with a decomposition efficiency of 95%-99%.
    RCO refers to the regenerative catalytic combustion method, and the English is “Regenerative Catalytic Oxidation Oxidition”. The principle of RCO regenerative catalytic combustion is as follows: the first step is the adsorption of VOC molecules by the catalyst, and the concentration of the reactants is increased. The second step is to reduce the activation energy of the reaction and increase the reaction rate. By means of the catalyst, the organic waste gas can be anaerobicly burned at a lower light-off temperature, and decomposed into CO2 and H2O to release a large amount of heat. Compared with direct combustion, it has the characteristics of low light-off temperature and low energy consumption. In the case where the light-off temperature is reached, no external heating is required, and the reaction temperature is 250-400℃.rto honeycomb ceramics 2 rto honeycomb ceramics 1

    Main Size:

    L*W*G(mm)  

     

    150x 150 x 300(150)

     

     
    Number of Cell 25×25=625 40×40= 1600 43×43=1849 50×50=2500 60×60=3600
    Width of Cell(mm) 4.95 3.02 2.81 2.38 1.98
    Thickness of inner wall(mm) 1.0 0.7 0.65 0.6 0.5
    Surface Area(m2/m3) 577 886 950 1084 1294
    Opening Ratio(%) 68 65 65 63 63

    Physical Properties:

    Item Aluminum Porceian-cordierite Dense aluminum porcelain Cordierite Mullite-Cordierite Mullite Enamel
    Density(g/cm3) 2.0~2.3 2.4~2.6 1.6~1.9 1.7~2.0 2.0~2.4 1.7~2.0
    Bulk density (g/cm3) 0.65~0.8 0.65~0.8 0.6~0.7 0.65~0.75 0.65~0.8 0.65~0.75
    Thermal Expansion Coefficient

    (X10-6°C-1) (RT-800°C)

    		 ≤6 ≤6 ≤3 ≤3.5 ≤5.5 ≤6.5
    Specific heat capacity

    (J/Kg.k)

    		 950~1150 1000~1200 900~1100 900~1100 1000~1150 900~1100
    Thermal Conductivity (w/m.k)(20-1000°C) 1.5~2.0 1.5~2.0 1.2~1.8 1.4~1.9 1.5~2.0 1.4~1.9
    Thermal shock resistance Max Temperature(℃） ≥400 ≥300 ≥450 ≥350 ≥350 ≥300
    Advised Max Temperature(℃） 1250 1350 1150 1250 1450 1200
    Water Absorption Rate(%) ≤20 ≤5 ≤22 ≤20 ≤20 ≤10

    Chemical composition:

    Item Aluminum Porceian-cordierite Dense aluminum porcelain Cordierite Mullite-Cordierite Mullite Enamel
    SiO2 25~35 25~35 45~55 40~50 25~35 68~72
    Al2O3 55~65 55~65 28~38 55~65 55~65 22~26
    MgO 2~4 2~4 11~14 5~9 ≤2 ≤0.5
    Fe203+TiO2 1~4 1~4 1~3 1~3 1~4 1~3
    Others ≤5 ≤5 ≤5 ≤5 ≤5 ≤5
    L*W*G(mm) 150x 150 x 300(150)
    Number of Cell 25×25=625 40×40= 1600 43×43=1849 50×50=2500 60×60=3600
    Width of Cell(mm) 4.95 3.02 2.81 2.38 1.98
    Thickness of inner wall(mm) 1 0.7 0.65 0.6 0.5
    Surface Area(m2/m3) 577 886 950 1084 1294
    Opening Ratio(%) 68 65 65 63 63

  • High Alumina Refractory Bricks

    Product features：

    1.High refractoriness
    2.High-temperature strength
    3.High thermal stability
    4.Neutral refractory
    5.Good resistance to acid and basic slag corrosion
    6.High refractoriness under load

    high alumina refractory bricks4

    Physio-chemical Index of High Alumina Bricks :

    Items First grade

    high alumina brick

    		 Second grade

    high alumina brick

    		 Third grade

    high alumina brick

    		 Special grade

    high alumina brick
    LZ-75 LZ-65 LZ-55 LZ-80
    Al2O3 % ≥ 75 65 55 82
    Fe2O3 % ≤ 2.5 2.5 2.6 2.0
    Bulk Density g/cm3 2.5 2.4 2.3 2.6
    Cold Crushing Strength MPa ≥ 70 60 50 80
    0.2MPa Refractoriness Under Load  ℃ 1510 1460 1420 1550
    Refractoriness ℃ ≥ 1790 1770 1770 1790
    Apparent Porosity % ≤ 22 23 24 21
    Reheating Linear Change 1450℃×2h  % -0.3 -0.4 -0.4 -0.2

    Applications of High Alumina Bricks:

    High alumina bricks are popularly used for the masonry of industrial kilns’ inner linings, such as blast furnaces, hot blast furnaces, electric furnace top, reverberator, rotary cement kiln, and so on. Besides, high alumina bricks are also widely used as regenerative checker bricks, stopper of the continuous casting system, nozzle bricks, etc.

    high alumina refractory bricks5

  • Alumina Carbon Bricks

    Catalog

    ★ What are the Common Alumina Carbon Brick

    Burned Micropores Alumina-Carbon Brick
    Burned Micropores Alumina-Carbon Brick features
    Burned Microporous Alumina-Carbon Brick Technique Data
    Aluminium Carbon-based Refractories for Continuous Casting Tundish

    ★ Aluminum Carbon Bricks Application
    ★ Aluminum Carbon Bricks Manufacture Process
    ★ What are the Raw Materials and Binders of Aluminum Carbon Bricks

    ★ What are the Common Alumina Carbon Brick

    1.Burned Micro-pores Alumina-Carbon Brick is mainly used for working lining of bosh above the air pip and belly. The average pore diameter of micro-pore alumina carbon brick is less than 1µm, and the volume percentage of the pores less than 1µm is no less than 70%.

    Burned Microporous Alumina-Carbon Brick features

    (1) Low porosity & low air permeability.
    (2) high crushing strength & high thermal conductivity.
    (3) Anti-slag, anti-alkali, anti-erosion ability.
    (4) Good thermal shock stability.

    Burned Microporous Alumina-Carbon Brick Technique Data

    Item Index
    RSAC-1 RSAC-2 RSAC-3
    Al 2 O 3 ,% ≥ 65 60 55
    C,% ≥ 11 11 9
    Fe 2 O 3 ,% ≤ 1.5 1.5 1.5
    Bulk density, g/cm 3 ≥ 2.85 2.65 2.55
    Apparent porosity, % ≤ 16 17 18
    Cold crushing strength, Mpa ≥ 70 60 50
    Refractoriness under load(0.2Mpa, Ti) °C ≥ 1650 1650 1600
    Thermal shock stability, times ≥ 100 100 100
    Iron liquid corrosion index,% ≤ 2 3 4
    Air permeability, mDa ≤ 0.5 2 2
    Average pore size, mm≤ 0.5 1 1
    Less than 1mm Pores volume percentage % ≥ 80 70 70
    Anti-alkali performance,% ≤ 10 10 15
    Thermal conductivity, w/m·k ≥ 13 13 13

    2. Aluminium Carbon Refractories used for Continuous Casting Tundish, mainly include upper nozzle, lower nozzle, and stoppers, which are also called special-shaped aluminum carbon bricks. The raw materials of continuous casting nozzles and stoppers are corundum and graphite. A small number of additives are added to raw materials during the production process. Phenolic resin is used as a binder of alumina carbon nozzles and stoppers. After mixing, molding and drying, green bodies are burned in a non-oxidizing firing kiln. The firing temperature is 1350 °C, after machining, anti-oxidation coating can be spayed to the surface to prolong their service life.

    Aluminum Carbon Refractories for Continuous Casting Tundish

    (1) Good integrity and safe use.
    (2) To better purify the molten steel.
    (3) High strength, good resistance to molten steel, and slag erosion.
    (4) Wear resistance and long service life.

    ★ Aluminum Carbon Bricks Application

    Aluminum carbon bricks can be used in blast furnaces, continuous casting tundishes (long nozzles, submerged nozzles, stoppers, upper and lower nozzle bricks, slide plate bricks), ladle, hot metal cans, torpedoes, and other thermal equipment.

    ★ Aluminum Carbon Bricks Manufacture Process

    Add graphite raw materials to alumina raw materials (corundum, mullite, bauxite), add small amounts of other raw materials such as silicon powder and SiC powder, then mixed with resin or asphalt binder, molded by press machine and finally fired at about 1300 ° C in a reducing atmosphere kiln.

    ★ What are the Raw Materials and Binders for Making Aluminum Carbon Bricks

    For the unfired aluminum carbon bricks, the commonly used raw materials are corundum, mullite, first-grade high-alumina bauxite clinker, graphite, SiC, and Si powder. Commonly used binding agents are resin, tar, asphalt, and the like. Different raw materials should be used for the production of aluminum carbon bricks based on applications.

    The above is a brief introduction to aluminum carbon bricks. If you need to purchase aluminum carbon bricks, RS Refractory can supply you with the best quality products at a competitive price. We can also customize refractory products according to your requirements and provide you best refractory materials and engineering solutions.

  • Alumina Silica Fire Brick for Sale

    High-Purity Alumina Silica Fire Bricks Properties

    High-Temperature Bulk Density
    Excellent Capacity of Refractoriness under load
    High Thermal Conductivity
    Low Porosity
    Excellent Abrasion Resistant Ability
    Excellent Thermal Shock Performance

    Alumina Silica Fire Brick Physical & Chemical Index

    Item RSAS60 RSAS70 RSAS75 RSAS80
    AL2O3(%) ≥60 ≥70 ≥75 ≥80
    SIO2(%) 32 22 20 ≥18
    Fe2O3(%) ≤1.7 ≤1.8 ≤1.8 ≤1.8
    Refractoriness °C 1790 >1800 >1825 ≥1850
    Bulk density,g/cm3 2.4 2.45-2.5 2.55-2.6 2.65-2.7
    Softening temperature under load ≥1470 ≥1520 ≥1530 ≥1550
    Apparent porosity,% 22 <22 <21 20
    Cold Crushing strength Mpa ≥45 ≥50 ≥54 ≥60

    Three Major Categories of Alumina Silica Bricks

    Semi Siliceous Products (Al2O3≤30%)
    Fire Clay Products (30%≤Al2O3≤48%)
    High Alumina Products (Al2O3≥48%)

    Different raw materials and volumes of components determine the kind of products.

    Alumina Silica Fire Brick Applications

    1. Steel furnaces
    2. Ironmaking furnaces
    3. Glass kiln
    4. Ceramic tunnel kiln
    5. Cement kiln

    Our alumina silica fire brick products have been shipped all around the world, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq, etc. welcome to buy alumina silica firebrick at Rongsheng and enjoy our high-quality service. Please leave your message and we will be in contact as soon as possible.

  • High Alumina Checker Firebrick

    Choose the type that you need, or provide the size you need.

    High Alumina Checker Firebrick Features & Advantages

    1. High refractoriness.
    2. Good spalling resistance and wear resistance.
    3. Good corrosion resistance.
    4. Good thermal shock resistance.
    5. High mechanical strength.
    6. High-temperature creep rate is low.

    High Alumina Checker Firebrick for Furnace Technique Data

    High Alumina Checker Firebrick Physical and Chemical Index:
    Item Properties
    RS-80 RS-75 RS-65 RS-55 RS-48
    Al2O3 (%) 80 ≥75 ≥65 ≥55 ≥48
    Refractoriness  (°C ) ≥1790 ≥1790 ≥1790 ≥1770 ≥1750
    Bulk density  (g/cm3) 2.65 2.5 2.45 2.4 2.3
    Softening temperature under load  (°C ) 1530 ≥1520 ≥1500 ≥1470 ≥1420
    ReheatingLinear Change Rate  (%) 1500°CX2H 0.1 0.1 0.1 0.1 0.1
    1450°CX2H -0.4 -0.4 -0.4 -0.4 -0.4
    Apparent porosity (%) 22 ≤23 ≤23 ≤22 ≤22
    Cold crushing strength (Mpa) 55 ≥50 ≥45 ≥40 ≥35
    Application steel furnace, glass furnace, sodium silicate furnace, ceramic shuttle kiln, cement rotary kiln, blast furnace, electric furnace, blast furnace, and reverberatory furnace.

    High Alumina Checker Firebrick Applications

    1. Steel furnaces
    2. Ironmaking furnaces
    3. Glass kiln
    4. Ceramic tunnel kiln
    5. Cement kiln

    About Rongsheng Kiln Refractory Company

    Zhengzhou Rongsheng Kiln Refractory Co., Ltd, located in the beautiful Xinmi City, Henan Province with rich refractory materials. Established in the early 90s of twenty century, with continuous innovation and development, now we are a comprehensive enterprise producing refractory in metallurgy, electric power, building materials, chemical industry, glass, non-ferrous metals, etc. There is more than 180 staff, including 20 professional technicians. We have 3 automatic production lines for shaped, unshaped, and insulating refractory materials.

  • High Alumina Runner Bricks

    High Alumina Runner Bricks Physical & Chemical Index

    Modle/item Fire-clay High Alumina andalusite
    FC-36 FC-40 HL-48 HL-55 HL-65 HL-70
    Al2O3 % >36 >40 >48 >55 >65 >70 >57
    Fe2O3 % <2.0 <1.8 <2.0 <2.0 <2.0 <1.5 <2.0
    Alkalinity % <1.8 <1.8 <1.8 <1.8 <1.8 <1.8 /
    Apparent porosity % 17-25 <22 <25 <26 <26 <25 <25
    Bulk Density g/cm3 >2.1 >2.18 >2.2 >2.25 >2.3 >2.35 >2.30
    Refractoriness ℃ >1700 >1710 >1750 >1770 >1790 >1790 >1790

    High Alumina Runner Bricks Applications

    1. Steel furnaces
    2.Ironmaking furnaces
    3. Glass kiln
    4. Ceramic tunnel kiln
    5. Cement kiln

    High Alumina Runner Bricks Can Be Customized

    We offer fire clay, high alumina, alumina-mullite, and other customized materials in the manufacturing of hollow wares.

    We offer a typical set of hollow wares consist of the following shapes for ingot casting of steel:

    -Funnel or Trumpet – Bell Bricks
    -Long, Round Stack Bricks
    -Short, Round Stack Bricks
    -Bottom Guide Bricks
    -Spider or Center Runner Bricks( 1-way through 8-way)
    -Long, Square Runner Bricks
    -Short, Square Runner Bricks
    -End Gate Bricks
    -Center Riser Bricks

    Other shapes and sizes are available based on the specific requirements of the customers.