What is the scope of this standard?

It covers dimensions and materials for dry process cement rotary kilns with suspension preheaters, for capacities ranging from 600 to 3000 tonnes per day.

What material is specified for the main kiln shell?

It specifies IS 2002 (Boiler and Pressure Vessel Steel) for hotter zones and IS 2062 (Structural Steel) for cooler zones.

Does this standard cover the refractory lining?

No, it focuses on the metallic components of the kiln. Refractory selection is covered under separate standards like IS 6 and IS 8 and depends on specific process requirements.

What are the standard kiln capacities covered in this IS code?

The code provides standardized dimensions for kiln capacities of 600, 1000, 1200, 1500, 2000 and 3000 tonnes per day (tpd).

IS 8125

: 1976

Dimensions and materials of cement rotary kilns, components and auxiliaries (dry process with suspension preheater)

CurrentSpecializedSpecificationMaterials Science · Cement, Concrete, Aggregates and RCC

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This standard specifies the principal dimensions, capacities, and materials for the main components of cement rotary kilns operating on the dry process with suspension preheaters. It aims to rationalize the design and manufacturing of kilns and their auxiliaries like shells, tyres, rollers, and gears to promote standardization in the Indian cement industry.

Dimensions and materials of cement rotary kilns, components and auxiliaries (dry process with suspension preheater)

Quick Reference Values

Nominal Kiln Slope3 to 4 %

Kiln Rotational Speed1.5 to 3.5 rpm

Material for Kiln Shell (Hot Zone)IS 2002 Gr 2A or 2B Steel

Material for Kiln Shell (Cold Zone)IS 2062 Steel

Material for Tyres and RollersForged or Cast Steel (Class 3 or 4 of IS 1570)

Typical Length to Diameter (L/D) Ratio15 to 17

Practical Notes

This code is primarily for manufacturers and procurers of cement plant machinery, not for general civil engineers.

It helps in standardizing kiln sizes for specific production capacities (e.g., 600, 1000, 1200 tpd), which aids in planning and procurement.

While it provides material specifications, the final selection should also consider specific process conditions, fuel chemistry, and operational experience.