Coke quality

I think it mainly depends on three aspects: particle size, porosity and color.

Look at its density； Is the color silvery gray? ； Is the knocking sound crisp?

The main factors used to evaluate the quality of coke include coke's M, A, V, S, M10, M40, CRI, CSR, porosity, and crack degree. The most commonly used ones now include V, S, M10, M40, CRI, and CSR.

Coke has a wide range of uses, such as ironmaking, casting, calcium carbide production, sintering, gas production and non-ferrous metal smelting. Coke is used in various industrial sectors. Different uses have different requirements for coke. 1. Requirements for coke used in ironmaking: The block size is >25mm, the ash content (A) and sulfur content (S) cannot be too high, and there is a certain crushing strength (M40) and wear resistance (M10). 2. Requirements for casting coke: Coke with large lumpiness, high strength, low porosity and low reactivity. 3. Requirements for gasification coke: It should have as much reactivity as possible to make small pieces of coke with large porosity and poor wear resistance ； The coke is required to have a high ash melting point so that the ash is less likely to melt and agglomerate, thereby destroying the distribution of air flow along the cross section of the furnace. 4. Requirements for calcium carbide coke: It has high fixed carbon, low ash content, does not require high strength, and has a particle size of 15 mm to 20 mm. Therefore, it is more suitable to use blended coal containing petroleum delayed coke to make calcium carbide coke. 5. Requirements for coke in non-ferrous metal smelting: Coke is not required to have high mechanical strength, and a moderately high sulfur content (≤2.3%) is a favorable factor because less sulfur solvent can be added.

Look at the slender strips of coke. It has a metallic sound and is silvery white. If a large piece falls, see how hard it falls and how broken it is. Personal opinion.