Providing Cement Producers the Material Handling Efficiency to Achieve Production Goals

The ever changing dynamics of global cement demand requires producers to constantly adjust output while maintaining acceptable profit margins. We understand your need to effectively move materials throughout your facility. You need to deliver product from off-load through clinker production, to packaging and shipping in a safe, reliable manner. Our experience with handling the high-temperature materials in a 24/7, operating environment means you will receive the most durable, reliable drag conveyor in the industry.

Our conveyors have sealed housings and heavy-duty chain assemblies. We are experienced in handling a wide-range of raw materials from limestone, to clay & shale, to sand, to iron ore and ash. Our chains have the exterior hardness and maximum strength to withstand operating temperatures in excess of 1,000°F.

Raw Materials

Our conveyors are engineered to handle material throughout the cement production process raw materials; limestone, sand, clay, and gypsum.


Moving minerals prior to primary and secondary crushing requires a conveyor designed to allow proper material flow. Increased chain flight spacing coupled with a large cross-sectional conveying area are important to achieving and maintaining positive flow.

As Limestone goes through the crushing process and is converted into ground raw meal the material is now more free flowing. At this stage the conveyor design requires tight flight spacing to ensure a uniform product bed depth withing the conveyor. The conveyor can be sized to handle the additive; iron ore, sand, clay, or ash so the mixture can move further in the cement production process.(Note: for this section we could use an image of limestone or sand).

Clinker Handling

In the calcining process, the kilns can exceed 1000 deg F (600 deg C). The breakdown of the minerals during this process makes the resulting clinker a highly abrasive material. The high heat of the material coming out of the kiln coupled with the subsequent cooling of the clinker adds further complexity to the design of the conveyors at this stage in the cement manufacturing process. To ensure the conveyors are durable enough to handle the heat, abrasion, and thermal expansion the CDM Drag Conveyors are typically designed with the following features;

En-Masse Conveyors

  • ARS steel plate housing that has greater mass than a standard conveyor
  • An over-sized chain is typically required to handle the high heat. The actual size is based on the expected delta of the temperature range from heating to cooling coupled with the chain pull/strength requirements.
  • A catenary drive section is a common design feature due to the high temperature and thermal expansion. The housing and chain will not expand at the same rate; therefore, the catenary drive will allow the chain to expand and will minimize chain wear and elongation between tension adjustment intervals.
  • An annealed chain can also be used if temperatures inside the conveyor are expected to reach 1,000 deg F (538 deg C).

En-Masse Conveyors

Conveyors from Receiving through Load-out

Our conveyors are properly designed to handle material within a cement production plant throughout the entire manufacturing process.

Rail/Truck Receiving

  • En-Masse Drag Conveyor offers a high volume material movement in a relatively smaller conveyor size.
  • The sealed housing minimizes material loss and improves plant safety.


Drag conveyors move material long distances. Intermediate discharge locations allow for positive material discharge with virtually no carry-over.

Bin/Bunker Draw-off

Material can be metered without the need of additional metering devices.

Clinker Handling

Properly engineered conveyors and chain can provide longevity and reliability even against heat, abrasion, and thermal expansion.


Incline conveyors easily elevate material to platforms for rail/truck loading.