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Pilot-scale carbonization

Pilot-scale coke-making and coke test work is used to demonstrate the ability of coking coals to produce quality metallurgical coke. This test-work may be required on exploration samples, for quality control of production samples, for blending programs, and for certification of coal shipment quality. ALS operates two 460 mm wide pilot-scale coke ovens. These ovens require approximately 400 kg of coal per cycle. They are configured to simulate the coal to coke transformation that occurs in commercial byproduct coke battery ovens.

Process overview

The pilot-scale coke-making process is complex, requiring a thorough understanding of the process to achieve sensible outcomes. A generalized process overview is provided below:

Control systems

During preparation of the sample for coke-making, all data is captured by ALS’ in-house laboratory information management system. This system is connected to all balances to ensure a there is a fully visible and auditable process. During coke-making, the oven wall temperatures are controlled by cRIO data management and data logging system controlling 6 solid state thyristors which in turn control 12 SiC elements per oven. Data from the pressure transducers, which measure internal gas pressure, and load cells, which measure wall force, along with wall and center temperatures, are captured by the cRIO data logging function. During coke testing, all data is again captured by the laboratory information management system. Coke analysis is typically tested as duplicates, with results falling outside standard repeatability limits being re-tested.

Laboratory support

Comprehensive coal characterization is typically required on the feed coal. This is typically sub-sampling prior to coke-making and processing the coal through ALS’ extensive laboratory network.

Related resources

Carbonización a pequeña escala

Para muestras más pequeñas, ALS proporciona un horno de coque a pequeña escala que requiere aproximadamente 10 kg por carga, pero no puede producir el mismo rango de índice de coque