A Swelling number is defined by reference to a series of standard profiles, the size and shape of the residue obtained when a specified mass of coal is heated in a covered crucible under specified conditions
Coal Ash is the non-combustible waste material left after coal is burned. The heat from the burning of the coal melts the coal ash which, when cool forms 'clinker', a stony residue from burnt coal. Large coal furnaces suffer from clinker build-up which can result in the closure of the furnace to allow removal. if the fusibility characteristics of the coal ash are known, control of temperature can avoid clinker formation
The Carbolite Gero Coke Reactivity Index Furnace (CRI) determines lump-coke reactivity in carbon dioxide gas at elevated temperatures. When coke lumps descend in the blast furnace they are subjected to reaction with counter current CO2 and to abration as they rub together against the walls of the furnace. These concurrent processes physically weaken and chemically react with the coke lumps producing an excess of fines that can decrease burden permeability and result in increased coke rates and lost hot metal production. The test method is design to indirectly measure to behaviour of coke in the blast furnace
The Coke strength after reduction (CSR) test measures the resistance of coke to degrade from impact and abrasion during its descent into the blast furnace. The coke is tumbled in a drum 600 times for 30 minutes. Most blast furnace operators require a coke with a CSR greater than 60.
A single tumbler unit is supplied to enable tumble testing in accordance with ASTM D5341-14 or ISO 18894 (2006). The Tumbler is a free standing unit and consists of one drum. To allow worldwide use a variable frequency motor control is fitted, ensuring the tumbler stops after the required number of revolutions define by the standard
Carbolite Gero's Pilot-scale fixed wall cooking oven is designed for the testing of granulated and graded coals for coking under accurately controlled conditions.
Design and bulit for testing granulated and graded coals for heating under accurately controlled condition, Carbolite Gero's pilot -scale variable width moving wall cooking test oven replicates operating conditions found in commercial coke ovens. The oven continuously measures the maximum coke oven wall pressure and internal gas pressure developed during the carbonisation process
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