Coke strength after reaction
Encyclopedia
Coke Strength after Reaction (CSR) refers to coke
"hot" strength, generally a quality reference in a simulated reaction condition in an industrial
blast furnace
. The test is based on a procedure developed by Nippon Steel
Corp in the 1970s as an attempt to get an indication of coke performance and is used widely throughout the world since then. It is one of the major considerations when blending coking coal for export sale.
of carbon dioxide
for 2 hours. The coke is preheated and cooled under nitrogen
and the weight loss during reaction is measured. The percentage weight loss is known as the reactivity (CRI). The reacted coke is placed in an I-type drum (no lifters) and subjected to 600 revolutions in 30 minutes. The percent of carbon
material removed from the drum that is +10 mm is known as the coke strength after reaction (CSR).
Coke (fuel)
Coke is the solid carbonaceous material derived from destructive distillation of low-ash, low-sulfur bituminous coal. Cokes from coal are grey, hard, and porous. While coke can be formed naturally, the commonly used form is man-made.- History :...
"hot" strength, generally a quality reference in a simulated reaction condition in an industrial
Industry
Industry refers to the production of an economic good or service within an economy.-Industrial sectors:There are four key industrial economic sectors: the primary sector, largely raw material extraction industries such as mining and farming; the secondary sector, involving refining, construction,...
blast furnace
Blast furnace
A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally iron.In a blast furnace, fuel and ore and flux are continuously supplied through the top of the furnace, while air is blown into the bottom of the chamber, so that the chemical reactions...
. The test is based on a procedure developed by Nippon Steel
Nippon Steel
, also referred to as , was formed in 1970. Nippon Steel Corporation is the world's 4th largest steel producer by volume.-Early years:Nippon Steel was created by the merger of two giants, Yawata Iron & Steel and Fuji Iron & Steel...
Corp in the 1970s as an attempt to get an indication of coke performance and is used widely throughout the world since then. It is one of the major considerations when blending coking coal for export sale.
Test procedure
In the test, a 200 g sample of –21 mm to +19 mm particle range coke is heated at 1100 °C under 1 atmosphere pressureAtmosphere (unit)
The standard atmosphere is an international reference pressure defined as 101325 Pa and formerly used as unit of pressure. For practical purposes it has been replaced by the bar which is 105 Pa...
of carbon dioxide
Carbon dioxide
Carbon dioxide is a naturally occurring chemical compound composed of two oxygen atoms covalently bonded to a single carbon atom...
for 2 hours. The coke is preheated and cooled under nitrogen
Nitrogen
Nitrogen is a chemical element that has the symbol N, atomic number of 7 and atomic mass 14.00674 u. Elemental nitrogen is a colorless, odorless, tasteless, and mostly inert diatomic gas at standard conditions, constituting 78.08% by volume of Earth's atmosphere...
and the weight loss during reaction is measured. The percentage weight loss is known as the reactivity (CRI). The reacted coke is placed in an I-type drum (no lifters) and subjected to 600 revolutions in 30 minutes. The percent of carbon
Carbon
Carbon is the chemical element with symbol C and atomic number 6. As a member of group 14 on the periodic table, it is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds...
material removed from the drum that is +10 mm is known as the coke strength after reaction (CSR).