CSR CRI Equipment

CSR CRI
CSR CRI 2
CSR CRI 1

The most widespread test for characterizing coke degradation potential in a blast furnace is the Nippon Steel Cooperation (NSC) CSR/CRI test. This is a standardized test to determine the coke reactivity according to the endothermic solution loss reaction (C+CO2<—C->O) and the coke mechanical strength after reaction. The weight loss of coke represents the Coke Reactivity Index, CRI, and the remaining coke on the +10 mm sieve represents the Coke Strength after Reaction, CSR. The Indian Standard referred for this is BIS 4023:Method B.

  1. Sieves

a)19mm, 21 mm square aperture sieve set – 1 no (450mmX450mm square)

b)10mm aperture sieve (round aperture) – 1 No (200mm X 200mm square)

  1. Gas Flow/ regulating control panel

Gas regulating control panel is for flow of inert gas and/or Carbon dioxide gas during test period.

Flow rate of CO2 and N2:5 LPM +/-1.0LPM

  1. Reduction Tube

Reduction tube is made of non-scaling, heat-resisting metal to withstand temperature of 1150 deg C.

The reduction tube has gas inlet and outlet points. Inside diameter of tube:76+/-1.0mm

  1. Sample Holder

Sample holder is made from INCONEL 600.

It is equipped with a thermocouple to measure the temperature of the sample.

The sample holder has a loose fitting and perforated bottom with Alumina balls for distribution of reduction gas.

  1. Online Electronic weighing balance ±5.0grams accuracy

Online weighing balance is installed for continuous online measurement of sample during reduction to measure the loss of sample due to gaseous reactions during reduction.

  1. Temperature control panel

Temperature control panel will assist in temperature regulation and automatic control of sample testing temperature during entire test duration.