The Zhonghao catalogue lists 75–35 mm, 35–18 mm, 18–8 mm and below 6 mm as reference size ranges. An RFQ should select the relevant range and state any separate limit for fines or oversize.
Transport and handling can change the delivered distribution. The order should therefore define the sampling location, screen method, sample preparation and which result controls acceptance.
Where size affects furnace charging or burden permeability, use a trial with recorded delivered distribution rather than relying only on a product photograph.
Sources used for this article
- Zhonghao formal product catalogue, page 1, Semi Coke size references