Foundry coke hi metal casting industry-a thil pawimawh tak a ni a, melting process atan heat source leh chemical reduction environment mamawh a pe a ni. Metallurgical coke ang lo takin foundry coke hian post-reaction strength sang zawk (CSR > 60%), reactivity hniam zawk (CRI < 30%), leh combustion characteristic stable zawk a mamawh a ni. High{5}}quality foundry coke hian a tlangpuiin ash content 10–12% hnuai lam, sulfur content 0.7% hnuai lam, leh volatile matter 1.5% vel a nei a, hei hian melting temperature stable leh high{10}}purity molten iron a tichiang a ni.
Tunlai foundry coke siamchhuahnaah hian a bul berah chuan high-quality low-volatile coal (coking coal leh fat coal ang chi) chu a proportion dik takah a hmang a, coke structure chu specialized coking process hmangin a ti tha zawk a, dry quenching (CDQ) te pawh a tel. Physics indicator pawimawh tak takte chu: shatter strength (M40) > 85%, abrasion resistance (M10) < 8%, leh porosity controlled 35–45% inkar te hi a ni. Heng parameter te hian cupola furnace permeability, melting efficiency, leh molten iron quality te chu direct in a nghawng a ni.
International Foundry Association (IFA) chuan foundry coke hi grade thum-ah a then a, chungte chu high-end precision casting atan premium grade, automotive parts casting atan Grade 1, leh general casting production atan Grade 2 te an ni. Grade dik thlan hian melting efficiency 15–20% in a tisang thei a, energy hman zawng zawng 8–12% in a tihtlem thei bawk. Environment regulation a pun zel avangin low-emission foundry coke (sulphur hniam leh nitrogen hniam) mamawhna a sang chho zel a, kum khatah 18% zetin a pung a ni.
