The problem of calculating metallurgical coking index
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Recently, the issue of calculating the metallurgical coking index has been frequently discussed: 1. What is metallurgical coke? Some sources indicate that coke with a particle size of more than 10 mm is considered metallurgical coke; others state that it is metallurgical coke when the particle size is greater than 25 mm. So what exactly is the particle size required for something to be classified as metallurgical coke? 2. Calculation of metallurgical coking index: (1) Metallurgical coking index = 1 – coking dust ratio ； Our company uses this method: first, the coking powder ratio is calculated, and what remains is the metallurgical coke ratio. (2) Metallurgical coking ratio = the proportion of coke with a size >25mm in the total amount of coke. Is there an accurate definition and uniform calculation standard for this?
The proportion of coking coal with a metallurgical caking index of >25 mm in the total coking coal
Which standard specifies that the proportion of coke with a coking rate of 25 mm is…? Since the factory has always used materials with a diameter of over 10 mm, there is a need for a basis to switch to 25 mm. Thank you……
We also sell it to customers as coke, which allows us to earn more money; of course, there are some customers who don’t accept it and demand that it be screened first.
Metallurgical coke, as the name implies, generally refers to the coke used in blast furnace iron production, that is, the proportion of coke with a size >25mm in the total amount of coke.
At present, the coke used in large blast furnaces in our country is large pieces of coke with a size of >40 millimeters, while medium and small blast furnaces use large and medium-sized coke pieces with a size of >25 millimeters; some blast furnaces can also use medium-sized coke pieces with a size of 25–40 millimeters. Therefore, coke larger than 25 millimeters used for blast furnace ironmaking becomes metallurgical coke. (This is stated in the intermediate version of the book \"Coking Technology\".) OP, you say that coke with a size greater than 10 mm is metallurgical coke – where did you read that? What did you say?