Rongsheng Refractory Factory

Author: zzrsrefractories.com

  • Acid Resistant Mortar

    Acid Resistant Mortar Description

    Acid Resistant Mortar is made with over42.5 grade ordinary Portland cement, sand and powder made of compact sand, quartzite and igneous rock, and adding suitable sodium silicate and sodium fluosilicate. Acid Resistant Mortar is mainly used as lining material, acid floor and acid protective layer. Acid Resistant Mortar is a kind of special anticorrosive material with advantage of simple operation, good acid resistance, great impervious and hydrolytic resistance and low cost for kilns and furnace application.

    Acid Resistant Mortar Features

    High temperature resistance
    High resistance to acid erosion
    High waterproof and heat insulation
    High bonding strength
    High mechanical strength

    Application of Acid Resistant Mortar

    Refractory mortar is mainly used for coke oven, glass kiln, blast furnace hot blast stove and other industry kiln stove as protection layer for furnace lining through painting or gunning.
    Refractory mortar can be used in industries of metallurgy, building materials, machinery, petrochemical engineering, glass, boiler, electric power, steel & iron, cement and etc.

    Characters of Acid Resistant Mortar

    Proportion: 2.66
    Fineness: Residue on sieve for 900 holes per square centimeter is not greater than 1%. Residue on sieve for 4900 holes per square centimeter is not greater than 15%.
    Setting time: Initial set is not earlier than 30 minutes. Final set is not later than 8 hours.
    Acid stability: There is not crack, delaminating and damage after boiling for 1 hour in air and 40% sulfuric acid.
    Acid resistance: More than 97%.
    Tensile strength: specimen is conserved for 28 days in air. Its tensile strength is greater than 3Mpa. After boiling for 1 hour in 40% sulfuric acid, its intensity will not reduce.
    Compressive strength: specimen is conserved for 28 days in air. Its compressive strength is greater than 30Mpa.
    Kerosene absorption rate: Less than 13%.

    The mortar can be used in chemical, petroleum, metallurgy, machinery, paper making, textile, pharmaceutical, chemical fertilizers and other industrial equipment and also can be made acid-proof daub, acid-proof mortar, acid concrete, acid-proof brick and acid plate lining to prevent from erosion of sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid, acetic acid, chlorine, sulfur, nitrogen dioxide, oxygen and sulfur dioxide according to the actual need. The higher acid concentration and the better corrosion resistance, acid proof mortar has excellent stability.

    Rongsheng is a professional kiln refractory materials manufacturer. Contact us for more information about cheap acid resistance products.

  • High Alumina Ramming Mass

    The raw materials of high alumina ramming mass are premium bauxite clinker aggregate and fines, white corundum(tabular corundum, brown corundum) aggregate and fines, calcium aluminate cement binder or phosphate binder, additives and so on. To improve high temperature performance of high alumina ramming mass, phosphate binder or silica micro powder can be used to replace calcium aluminate cement to produce low cement high alumina ramming mass or ultra low cement high alumina ramming mass. The granularity distribution of raw materials is: max. granularity is 10~15mm, the ratio of aggregates and fines is (60~65)/(35~40), the ratio of coarse aggregates and fine aggregates is(60~70)/(30~40).

    High alumina ramming mass physiochemical indexes

    Item High alumina ramming mass
    GLDD-1 GLDD-2
    Al2O3，≥ 75 80
      SiO2，≥ 20 15
    Max. working temperature ℃ ≥ 1550 1650
    Bulk density g/cm3 ≥ 2.6 2.65
    Cold modulus of rupture Mpa 110℃*24h ≥8 ≥10
    1100℃*3h ≥8 ≥10
    Cold crushing strength Mpa 110℃*24h ≥80 ≥100
    1100℃*3h ≥80 ≥100
    Reheating linear change rate % 110℃*24h ±0.5 ±0.5

    The application of high alumina ramming mass

    High alumina ramming mass are widely used in monolithic working lining of steel ladle, induction furnace, electric furnace tapping spout, and the lining of high temperature vessels which contact with high temperature metal liquid or molten slag.
    RS Group also supply all kinds of unshaped refractory, such as refractory castable, ramming mass, gunning mix, coating mix, etc.. Our newly built automatic unshaped refractory production line greatly increase our production capacity. That is to say, RS Group can offer customers good quality products with favorable price and short process period.

  • Magnesia Refractory Ramming Mass

    Magnesia Refractory Ramming Mass Features

    Magnesia refractory ramming mass have high temperature volume stability.
    Magnesia ramming refractory mass have resistant to erosion and wear.
    Magnesia ramming refractory mass have good thermal shock resistance.
    Magnesia refractory ramming mass have high load softening temperature.

    Magnesia Refractory Ramming Mass Specification

    Item M-95 DM-90
    Al2o3(%) 95 90
    Cr2o3(%) 2.0 2.0
    Bulk Density(g/cm3) 220℃*3h 2.50 2.40
    Compressive Strength(Mpa) 220℃*3h 10 8
    1500℃*3h 20 20

    Magnesia Refractory Ramming Mass Application
    1. Magnesia ramming mass refractory can be used as a new furnace lining or as a lining repairing material, such as flat furnace bottom repair, converter lining repair, or steel mouth filling material.
    2. Refractory magnesia ramming mass product is mainly used for electric furnace bottom filling, converter repairing material, refractory ramming mass can be used as filler around the tapping port.
    3. Magnesium refractory ramming mass tundish is made of magnesium ramming material, refractory ramming mass is used for the working layer of the tundish. The service life after the whole pouring can be about 35 hours, magnesium refractory ramming mass is generally suitable for large tundish.

    Magnesia Refractory Ramming Mass Manufacturing Process
    Firstly, the high-purity magnesia and magnesium powder are calcined three times, so that the magnesia and magnesium powder are fully expanded and shrunk, and then the proportion of the magnesia particles is proportioned according to the formula, and then the binder, anti-cracking agent, stabilizer, stirring are added. Made into a dry magnesia ramming mass refractory.

    Magnesia Refractory Ramming Mass Contruction Method
    1.Magnesium refractory ramming mass add about 5% of the brine solution with a concentration of 35% before use, stir into a semi-dry mud, and dry or beat it manually or mechanically.
    2.Magnesium ramming refractory mass are widely used as fillers for special parts such as electric furnaces, open hearth furnaces, converters, iron alloy refining furnaces, and steel taps. Magnesia ramming refractory mass is required to have good overall stability under the action of frequently changing temperature. Magnesium ramming material made of magnesia and hexahydrate solution has good normal temperature and high temperature performance.

    Magnesia Refractory Ramming Mass Characteristics for Tundish
    1.Refractory magnesia ramming mass have anti-steel water wash, anti-erosion.
    2.Refractory magnesia ramming mass refractory have thermal shock performance is good.
    3.Refractory magnesia ramming mass refractory have high temperature volume stability.
    4.Magnesia ramming mass refractory have high temperature resistance, high load softening temperature.

    Magnesia Refractory Ramming Mass Construction Process
    1. First, ensure that the surface of the permanent lining is clean. Then install the impact board and the seat brick. The surrounding area is beaten with magnesium refractory ramming mass. Then the magnesium ramming material is poured into the bottom of the package and make the bottom thickness.
    2. the tire mold is installed, the distance between the tire mold and the permanent lining is consistent, so that it reaches the thickness required for the working lining.
    3.Pour the magnesium ramming refractory mass into the upper edge of the tire mold, and beat it with a rubber hammer, which is subject to the tamping.
    4. Clean the scene, ignite the baking burner on the tire mold for small fire baking, baking temperature 180-270 ° C, time 2h or so, so that the magnesium ramming material hardens to obtain a certain strength, such as the temperature drop of the tire mold release to below 100 ° C
    5. Check the lining of the working layer of the tundish and repair the furnace, if it is defective.

    Magnesia Refractory Ramming Mass Using Precautions
    1. Due to the special nature of magnesium refractory ramming mass, magnesia ramming refractory mass is forbidden to contact with water to prevent hydration.
    2. Magnesia ramming mass refractory is forbidden to use magnesium ramming material ,which is agglomerated and of unqualified quality.
    3. Determine the thickness of the lining of the working layer of the tundish according to the refractory ramming rass construction requirements.

    Magnesia Refractory Ramming Mass Manufacturing Process
    Firstly, the high-purity electrolytic magnesia and magnesium powder calcined three times. The purpose is to fully expand and shrink the electrolytic magnesia and magnesium powder. In expansion, contraction. The expansion and contraction rate is almost zero. Then the ratio of the particle size ratio is used. Add binders, anti-cracking agents, stabilizers, and other refractory materials. Stir into a dry mix.

    Magnesia Refractory Ramming Mass Supplier in RS Refractory Bricks Factory
    Rongsheng refractory castable factory has been engaged in refractory material industry for more than 20 years. Rongsheng refractory castable factory have a big technological team, there are more than 15 senior designers for the furnace & kiln. Refractory castable factory are good at different technological field, such as refractory bricks , refractory castable, lightweight insulation firebricks and prefabricated bricks according to client requirement.

    Rongsheng refractory castable have rich refractory raw materials and 20 years experienced in the refractory bricks manufacturing. Rongsheng refractory ramming mass can provide specification and category as well as competitive price & high-grade quality refractory castable products.

  • Graphite Electrodes

    Technical Characteristics of Graphite Electrode

    Name Unit Nominal Diameter
    UHP Ultra-High-Power HP Superstrong RP Conventional Power
    ≤Φ400 ≥Φ450 ≤Φ400 ≥Φ450 ≤Φ300 ≥Φ350
    Resistivity Electrode ΜΩ · m ≤5.5 ≤6.5 ≤8.5
    Nipple ≤4.5 ≤5.5 ≤6.5
    Flexural Strength Electrode MPa ≥11.0 ≥10.5 ≥9.8 ≥8.5 ≥7.0
    Nipple ≥20.0 ≥16.0 ≥15.0
    Elastic Modulus Electrode GPa ≤14.0 ≤12.0 ≤9.3
    Nipple ≤18.0 ≤16.0 ≤14.0
    Density Electrode g / cm3 ≥1.66 ≥1.67 ≥1.62 1.6 ≥1.53 ≥1.52
    Nipple ≥1.75 ≥1.73 ≥1.69
    Coefficient Of Thermal Expansion Electrode 10-6 / ℃ ≤1.5 ≤2.4 ≤2.9
    Nipple ≤1.4 ≤2.2 ≤2.8
    ASH % ≤0.3 ≤0.3 ≤0.5
    Note: 1.Koeffitsient ash content and thermal expansion as the reference index, the coefficient of thermal expansion (100 ℃ ~ 600 ℃), Custom manufacturing.

    graphite electrode 1

    The Length & Diameter & Permissible Deviation of Graphite Electrode

    graphite electrode 2
    Graphite Electrode Application

    1.mainly used for electric arc furnace (EAF) steel production
    2.for ore-thermal furnace; for the resistance furnace
    3.for the production of profiled graphite products
    4.for the production of shaped graphite products
    5.Also can used For a resistor furnace
    6.For the production of graphite shaped products

  • Graphite Electrodes UHP

    Rongsheng Kiln Refractory Company is a professional graphite electrode manufacturer in China. Our company always devoted into manufacturing high quality graphite electrodes for all customers that are demanded for their ease of use, long time service and options for wide ranging usages. Besides, our company also provide RP Graphite Electrodes, HP Graphite Electrode that you can choose from Rongsheng Group.

    Application of Graphite Electrode UHP

    Ultra-high-power graphite electrodes (EHSP-UHP) are manufactured for operation at currents with a density of more than 25A / cm2, and the graphite electrode UHP is mainly used for for ultra-high-power arc furnaces and powerful ladle furnaces.

    uhp graphite electrode 4

    (1) Used in Electric Arc Furnace
    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.

    (2) Used in Mine Electric Furnace
    The ore electric furnace is mainly used for the production of industrial silicon and yellow phosphorus. It features in that the lower part of the conductive electrode is buried in the charge, electric arcs are generated in material layer, and the heat released in the charge is used for the smelting. Mine electric furnaces which require high electric current density need to use graphite electrodes. For example, about 100 kg of graphite electrode is consumed for every t of silicon yield, and about 40 kg of graphite electrode is consumed for each t of yellow phosphorus production.

  • Graphite Electrodes HP

    The main raw material of graphite electrode is petrol coke, in regular power graphite electrode, a little amount of pitch coke can be added into the raw material. Both petrol coke and pitch coke should contain no more than 0.5% of sulfur. During producing HP graphite electrode and UHP graphite electrode, needle shape coke should be added into raw material. Petrol coke is the main material for the production of aluminum industry graphite anode, and its sulfur content should not exceed 1.5%~2%.

    hp graphite electrode2

    The Advantages of Graphite Electrode

    It is the best electrode material for electric arc furnace steelmaking.
    High sublimation point, excellent electric conductivity, high mechanical strength.
    Produces CO and CO2 gases when oxidized, won’t contaminate steel.
    The density can be adjusted to obtain the best thermal shock resistance.
    Low price, easy to process, is the ideal industrial material.

    Physical & Chemical Properties of HP Graphite Electrodes

    Items Classification Unit Nominal Diameter (mm)
    HP Graphite Electrode
    200-400 450-500 550-600
    Resistivity Electrode μΩm 7 7.5 7.5
    Nipple ≤ 6.3 6.3 6.3
    Bending Strength Electrode Mpa 10.5 10 8.5
    Nipple ≥ 17 17 17
    Young’s Modulus Electrode Gpa 14 14 14
    Nipple ≤ 16 16 16
    Bulk Density Electrode g/cm3 1.6 1.6 1.6
    Nipple ≥ 1.72 1.72 1.72
    CTE（100℃-600℃） Electrode ×10-6/℃ 2.4 2.4 2.4
    Nipple ≤ 2.2 2.2 2.2
    Ash Content Electrode % 0.5 0.5 0.5
    Nipple ≤

    Graphite Electrode HP 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 HP

    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 -275

    Application of HP Graphite Electrode

    The main application of HP graphite electrode is electric furnace steelmaking mill, which consumes about 70~80% of graphite electrode. HP graphite electrode are suitable for EAF furnaces with 18~25A/cm2 current intensity. Meanwhile, HP graphite electrode is also used in ore electric furnaces which are used for making industrial silicon and yellow phosphorous. HP graphite electrodes are also used in resistances such as graphitization furnace for producing graphite products, glass melting furnace and electric furnace for producing silicon carbide.