Drag Chain Conveyors Engineered for Improved Material HandlingBioMass

Drag Conveyor Operation

Our Drag Chain Conveyors Support Your Productivity:

Eliminate dust and feedstock loss with sealed housing
Exclusive chain formula - long-life and increased uptime
Chain and flight design selected for each unique application
Flight spacing in chain design engineered for optimum material movement with feedstock variability

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Chain Analysis Reveals Why Formula Matters

The data presented below are the results of an independent lab chemical analysis. The analysis was performed using 10 different industry available drag chains currently selling in the industrial market. Of the 10, we show 6 here because 4 were not even alloy steel making them an unequal comparison to the CDM Systems Chain Formula. The 6 manufacturer’s chain assemblies that use an alloy steel are shown below.

Chemical Analysis and Micro Structure Testing of Various 142MM Pitch Chains

Micro-Structure

	CDM	A	B	C	D	E
Core Hardness (BHN):	300-400	300-400	300-400	415	300-400	355
Case Hardness (BHN):	550-650	550-650	550-600	535	500-550	550-650
Effective Depth of Case:	.035	.022	.025	.010	.012	.055

The Chain Formulation Means the Difference Between Potential Catastrophic Failure and Operating Long-Term at Full Capacity

The most important feature of any drag chain formula is the effective case hardness depth. Once this case is worn through, elongation will accelerate and become a significant factor in maintenance. However, case depth is not unlimited and not the only factor in building a strong chain. The right formula or case hardness and ductility are critical. Too hard, as with a depth noted above of .055 and the ductility and impact resistance will be compromised and cause failures.

SEE FULL DETAILS OF CHEMICAL ANALYSIS:

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Application Experience

Utility Uses Farm Waste to Generate Power and Capitalizes on Revenue Streams

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CHALLENGE

CDM was contracted to provide a layout, conveyors, drives, structural steel towers and catwalk trusses for approx. 500 ft. of the conveying distance. Total conveying distance of the product is approximately 600 ft. Conveyors were designed at a rate of 20 TPH of Ash. In the event of boiler failure the conveyors are also required to handle the unburned fuel at a rate that exceeds 20 TPH.