Rongsheng Refractory Factory

Author: zzrsrefractories.com

  • Graphite Electrodes RP

    Advantages of RP Graphite Electrodes For Sale in RS

    1. Our product is made of high quality low ash materials, such as petroleum coke, needle coke and coal pitch.
    2. From calcining, burdening, kneading, forming, baking to pressure impregnation, graphitization, we pay attention to every detail to make it boutique.
    3. We know machining is very important, so we precision machined with professional CNC machining to make sure high quality.
    4. Such of the products own characteristics with low resistivity, good electrical conductivity, low ash, compact structure, good antioxidation and high mechanical strength.

    RP Graphite Electrode technical parameters

    Items Classification Unit Nominal Diameter (mm)
          75-130 150-225 250-300 350-450 500-800
    Resistivity Electrode μΩm 8.5 9 9 9 9
      Nipple   8 8 8 8 8
    Bending Strength Electrode Mpa 10 10 8 7 6.5
      Nipple   15 15 15 15 15
    Young’s Modulus Electrode Gpa 9.3 9.3 9.3 9.3 9.3
      Nipple   14 14 14 14 14
    Bulk Density Electrode g/cm3 1.58 1.53 1.53 1.53 1.52
      Nipple   1.7 1.7 1.7 1.7 1.7
    CTE (100℃-600℃) Electrode ×10-6/℃ 2.9 2.9 2.9 2.9 2.9
      Nipple   2.7 2.7 2.8 2.8 2.8
    Ash Content   % 0.5 0.5 0.5 0.5 0.5

    Graphite Electrode RP Current Capacity

    Nominal diameter Permissible current power The current density (A / cm2)
    Millimeter (mm) Inch (inch)
    300 12 10000-13000 17-24
    350 14 13500-18000 17-24
    400 16 18000-23500 16-24
    450 18 22000-27000 16-24
    500 20 25000-32000 15-24
    600 24 30000-36000 14-24

    The Length & Diameter & Permissible Deviation of Graphite Electrode RP

    Diameter Length
    Nominal diameter Actual diameter Nominal length tolerance
    Millimeters (mm) Inch (inch) Max. (Max.) Min (min) mm Length the maximum  
    300 12 307 302 1600 1800 ± 100 -100 -275
    350 14 357 352
    400 16 409 403
    450 18 460 454
    500 20 511 505 1600/1800/2000/2200
    1800/2000/2200
    1800/2000/2200/2400
    1800/2000/2200
    1800/2000/2200    		 ± 100 -100  

    Application of RP Graphite Electrode

    Electric furnace steelmaking mill is the largest user of graphite electrodes. Graphite electrodes used in steelmaking accounts for 70%-80% of the total graphite electrodes production. Graphite electrodes are used to conduct electric current into electric furnace, electric arcs generated between electrodes end and loaded materials can release large amount of heat for high temperature smelting.

    (1) For Resistance Furnace
    The graphitization furnace for producing graphite products, the furnace for glass melting, and the electric furnace for producing silicon carbide are all electric resistance furnaces. Materials loaded in these furnaces are not only heating resistances but also the objects to be heated. Usually, graphite electrodes for electric conduction are embedded in the wall of resistance furnace end part, so the graphite electrode used here is not continuously consumed.

    (2) For the Production of Special Shaped Graphite Products
    Graphite electrode workblank is also used to make a variety of special shaped graphite products such as crucible, mold, boat vessel and heating component. For example, in quartz glass industry, for every ton of electrofusion tube, 10t of graphite electrode blank is required, for every ton of quartz bricks, 100 kg of graphite electrode blank is consumed.

  • Ceramic Fiber Blanket

    Application of Ceramic Fiber Blanket

    Ceramic Fiber Blankets can be used in various applications which include Petrochemical, Refining, Steel, Ceramic, Glass, Fire Protection and Power Generation. This product can be fabricated and shop installed for most applications.

    Ceramic Fiber Blanket Description

    Classification temperature (℃) 1140 1260 1400 Testing Standards
    Brands LYGX-112 LYGX-212 LYGX-312 LYGX- 422 LYGX-512  – –
    Linear shrinkage (%) 950℃X24h5≤-3 1000℃X24h5≤-3 1100℃X24h5≤-3 1200℃X24h5≤-3 1350℃X24h5≤-3 GB/T17911
    Thermal conductivity(W/mK)(128Kg/m3) ≤0.153 YB/T4130
    (Average500℃)
    Compressive strength(h(thickness 25mm) ≥0.04 ≥0.05 ≥0.04 ≥0.06 GB/T17911
    Bulk dencity (Kg/m3) 64/96/128/160 GB/T17911
    Chemical composition (%) Al2O3 (%) ≥44 ≥45 ≥45 ≥53 ≥36 GB/T6900 GB/T4984
      Sio3 (%) ≥52 ≥52 ≥54 ≥46 ≥48  
      Zro3 (%)   __ __   __   __ _   __ _ ≥15  
      Fe2o3 (%) ≤1.0 ≤0.8 ≤0.2 ≤0.2 ≤0.1  
      AL2o3 +SiO2 (%) ≥96 ≥97 ≥99 ≥99    
      AL2o3 +Sio2 (%)   __ __   __   __ _   __ _ 99  
    Available size (mm/roll) 3600/7200X610X20/30/50   __
    Packaging Inside Plastic bag,outside woven bag Carton   __

  • Ceramic Fiber Board

    Ceramic Fiber Board Description

    Items STD RFC Board HP RCF Board HZ RCF Board
    Bulk Density(Kg/m3) 280/300/320 280/300/320 280/300/320
    Classification Temperature (℃) 1260 1260 1430
    Maximum Operating Temperature(℃) 1100 1200 1350
    Water Content(%) ≤1 ≤1 ≤1
    Linear Shrinkage After Heating(%) 1000℃*24h<2.5 1100℃*24h<2.5 1350℃*24h<2.5
    Thermal Conductivity(W/mK)      
    200℃ 0.074 0.055 0.078
    400℃ 0.092 0.073 0.102
    500℃ 0.103 0.086 0.116
    600℃ 0.127 0.105 0.135
    Cold Crushing Strength(Mpa) 0.2 0.12-0.2 0.12
    Loss Of Lgnition(wt%) ≤7 ≤7 ≤7

    Ceramic Fiber Board Application

    Use in industrial heat process equipment
    High temperature gasket & seals
    Flue & chimney linings in furnace & kilns
    Molten metal trough covers
    Expansion joint Industrial heat shields & thermal barriers
    Industrial combustion chamber construction
    Infra red element supports
    Board over blanket hot face lining
    Full thickness refractory lining
    High temperature boiler wall insulation
    Pouring forms for castable
    Lining material for glass annealing furnace
    Various fire-resistant insulation materials
    Insulation for semiconductor equipment

    Ceramic Fiber Board Manufacturer

    Ceramic fiber boards produced by RS refractory brick are adopting high quality raw material and produced through strict control. RS refractory manufacturer is specialized in producing various ceramic fibers, such as ceramic fiber blankets, ceramic fiber boards, ceramic fiber papers, ceramic fiber wools, ceramic fiber ropes, ceramic fiber cloths. If you have any purchase plan for ceramic fiber refractory materials, please feel free to contact with us!

  • Ceramic Fiber Module

    RONGSHENG ceramic fiber module use the enhanced H-type anchors, which have greater strength, closer to the cold face. It can make sure the strength in high temperature. The fixed link was welding together with the high quality heat-resistance steel and stamping butterfly plate. The two round fixed link were embedded in the module system, enlarged the bearing area and ensured the firm of anchor system.

    Characteristics

    Low bulk density,low thermal conductivity.
    Resistance to heat-shock, ability to resist the scouring of airflow.
    Excellent mechanical strength ,built-in anchor, safety performance.
    Easy to install. after installing the lining form a seamless space, good insulation effect.

    Application of Ceramic Fiber Module

    Ceramic Industry:Tunnel kiln, shuttle kiln, roller kiln.
    Petrochemical Industry: Atmospheric furnace, transforming furnace, coking furnace, cracking furnace, flue etc.
    Iron and Steel Industry: Ladle cover, annealing furnace,rotary furnace,bell furnace,walking beam furnace，hot air and flue pipes etc.
    Green energy industry：Waste incinerators, RTO exhaust treatment furnace, SCR environmental catalytic stove etc.

    Technical Index

    Ceramic Fiber Module RS1050 RS1260ST RS1260HP RS1350
    HA    		 RS1430
    Zr    		 RS1600
    PMF
    Classification Temperature 1050 1260 1260 1350 1430 1600
    192kg/m3/at()℃/24h
    Linear Shrinkage Rate    		 ≤2.0
    (850℃)    		 ≤2.0
    (1000℃)    		 ≤2.0
    (1050℃)    		 ≤2.0
    (1100℃)    		 ≤2.5
    (1200℃)    		 ≤1.5
    (1450℃)
    Density (KG/M3） 172-240 172-240 172-240 172-240 172-240 172-240
    Thermal Conductivity Rate(W/m.k) 400℃ 0.08 0.08 0.08 0.08 0.08 –
      600℃ 0.15 0.15 0.15 0.12 0.12 0.12
      800℃ 0.22 0.20 0.19 0.18 0.16 0.15
      1000℃ – – 0.22 0.12 0.19 0.18
    Chemical Composition（%） Al2O3 42-44 45-46 47-49 52-55 34-36 72-75
      Al2O3+SiO2 ≥99.0 ≥99.0 ≥99.0 ≥99.0 ≥99.0 ≥99.0
      ZrO3 – – – – 15-17 –
      Other ≤1.0 ≤1.0 ≤1.0 ≤1.0 ≤1.0 ≤1.0

    Standard Size and Package

    (300-600)*300*(150-300)mm，(Other specifications according to customer’s inquires).
    Density:172KG/M3、192KG/M3、220KG/M3、240KG/M3
    Package：Carton+Pallet.
    Installation：RONGSHENG also provide professional construction guidance and installation services.

  • Calcium Silicate Boards

    Heat Preservation Calcium Silicate Board

    Heat preservation calcium silicate board is also called micro pore calcium silicate, it is white, hard, new type heat preservation material, with low volume weight, high strength, low thermal conductivity, high temperature resistance, corrosion resistance, can be cut or sawed. The thickness is usually above 30mm, bulk density is between 200~1000kg/m3.

    The Characteristics of Calcium Silicate Board

    High strength, low volume density.
    Has good processing property and fire resistance.
    Low thermal conductivity, excellent heat insulating performance.
    Good water proof property, won’t expand or deform at wet atmosphere.
    Long service life, alkali and acid corrosion resistance.

    Calcium Silicate Products Physical Index

    Item Model I Model II
    Density  kg/m3 240 240
    Bending strength Kpa 310 310
    Crushing strength (5% deformation) Kpa 414 414
    24 hours heat-holding treatment temperature ℃ 649 871
    Linear shrinkage rate % 2.0 2.5
    Warping mm 6 6

    Calcium silicate boards applications

    Calcium silicate boards are used as heat preservation material for thermal tubes, industrial furnaces and kilns, the application industries cover power plant, chemical industry, metallurgy, shipbuilding industry and so on. Calcium silicate board is used as fire-proof and heat insulating material for buildings and apparatus. The insulating lining of high temperature drying kiln and tunnel kiln car working table is also made by calcium silicate boards. The two sides of calcium silicate board can be adhered with plastic decoration board, plywood, asbestos cement board and so on to form composite board, which has the function of decoration and fireproofing, as well as sound insulation.

  • Four factors affecting CFB boiler life

    Design & installation craft

    In recent years, no matter in separation method or in anti-wearing technique, there is great progress in CFB boiler development. From the perspective of anti-wearing refractory materials, degrading the quality of refractory materials is not good for the normal operation of the CFB boiler. Even when the quality of anti-wearing refractory materials is very good, if installation craft can’t meet standards and lead to dimensional deviation, there will be severe abrasion, or if refractory material is not corrected constructed, it will also greatly affects the safe and economic operation of CFB boiler.

    CFB boiler masonry craft

    Construction quality is crucial to the service life of the CFB boiler. CFB boiler construction workers should not only be familiar with furnace construction standards and electric power specifications but should know refractory materials performance well. As to the aspect of CFB boiler design, construction workers should know the design draft well, for example, fastening device, sealing device, and expansion joints preservation should be thoroughly considered. When the irrational design is discovered, it should be pointed out and put forward reasonable measures to avoid operational problems.

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    CFB boiler roasting craft

    CFB boiler main body structure is complicated, working lining construction area is large, water content is high, so proper roasting craft should be carried out after the finish of construction. If roasting is not done according to the designed craft or roasting time is shortened, material interior vapor pressure will be overlarge, when it exceeds the tensile strength of refractory material, there will have a structural rupture. After the operation of the boiler, the refractory lining will have structural sapling or thermal stress damage in the refractory material interior, the operation safety and the service life of the CFB boiler will be greatly affected. So, furnace roasting is very important to link before the operation of the CFB boiler.

    CFB boiler operation craft

    The successful blow-in rate is 100%. Although the boilers are produced by the same factory, are applied in the same region, and adopt the same kind of coal, there also have different problems during the operation of CFB boilers. The reason is that operational craft control is different. If workers don’t operate the CFB boiler according to specifications, there will have cracks, spalling, or even collapse during the CFB boiler operation. That is to say, the normative operation is the last factor affecting the service life of the CFB boiler.