REFRACTORY MATERIALS:
• Castables are classified into Conventional and Low and Ultra Low Cement. These castables ranges from a low to a maximum service temperature of 1800 o C varying from low to high alumina content. It has excellent resistance to abrasion and acid slag. It is best for use on sidewalls & roofs of heating furnaces and boilers. It is also an alternate casting to fireclay bricks. It is easy to use, just add water and mix.
• Mouldable Plastics are high alumina plastic refractory with excellent resistance to abrasion and thermal spalling. It is best for use in severe slag attack. It is used for general repairs of furnaces, incinerators, hoods of cement, lime & ceramic kilns, etc. It is easily rammed to any shape or contour.
• Fireclay Bricks are highly resistant to abrasion and thermal spalling. They are installed at combustion chambers of boilers or incinerators. Standard shapes (ST-64) are readily available while tailor-made dimensions would need specific lead times.
• High Alumina Bricks have high mechanical strengths and good volume stability at high temperature. It is best recommended on ladle applications, lower sidewalls & bottom of alumina refining and melting furnaces.
• Basic Bricks have high magnesium content (MgO-Spinel Brick Base) based on high purity synthetic magnesite and spinel. It gives an outstanding Thermal Shock Resistance, excellent Abrasion & Chemical Resistance, High Resistance against Redox Atmosphere and it is Environment Friendly. It is normally used in Cement rotary kilns.
• Bonding Mortars are available in wet and dry types. It is used for bonding fireclay, high alumina, and insulating bricks. It is a high alumina mortar with excellent workability and adherence. It protects joint from slag, fumes, molten metal, and abrasion.
WATER and WASTE-WATER TREATMENT CHEMICALS:
A. Boilers or Heat Exchangers:
• Corrosion Inhibitors allows dissolved oxygen (DO) to be completely and rapidly reduced at a lower temperature. It is especially designed for water treatment in heat exchange installations.
• Scale Deposit Treatments ensure dispersion and encapsulation of particles in suspension and sequestration of alkaline-earth salts.
• Liquid Oxygen Scavenger is very effective even at low temperatures.
B. Cooling Towers:
• Dispersant and Scale Inhibitor is best recommended for systems using muddy water or with high concentration of dissolved salts.
• Biocides are available in different types. These reagents are most effective with respect to algae, bacteria and fungi by the action of sterilization and destruction of microorganisms, algae and bacteria developing on walls. There is also that based on a quaternary ammonium compound but can be used in association with anionic dispersants, without risk of precipitation or loss of effectiveness. It is biodegradable and at recommended doses, does not require any treatment of wastes prior to disposal into rivers.
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