Services › Processed petroleum coke 0.1 - 1 mm Image 1 of 1 Processed petroleum coke 0.1 - 1 mm $0.00 Processed petroleum coke, with granules sizes between 0.1 and 1 mm, used for slag foaming process. Add To Cart Added! Processed petroleum coke, with granules sizes between 0.1 and 1 mm, used for slag foaming process.