Foundry coke yog cov khoom siv tseem ceeb hauv kev lag luam hlau casting, muab qhov tsim nyog qhov chaw sov thiab tshuaj txo qhov chaw rau cov txheej txheem melting. Tsis zoo li metallurgical coke, foundry coke yuav tsum tau siab dua post-reactivity (CSR> 60%), qis reactivity (CRI <30%), thiab ruaj khov combustion yam ntxwv. High-coke foundry zoo feem ntau muaj cov ntsiab lus tshauv qis dua 10-12%, cov ntsiab lus ntawm cov sulfur nyob rau hauv 0.7%, thiab cov teeb meem tsis haum xeeb nyob ib puag ncig 1.5%, kom ntseeg tau qhov kub thiab txias thiab siab -purity molten hlau.
Niaj hnub nimno foundry coke ntau lawm feem ntau yog siv high -zoo low-volatile coals (xws li coking thee thiab roj thee) nyob rau hauv meej proportions thiab optimizes coke qauv los ntawm tshwj xeeb coking txheej txheem, nrog rau qhuav quenching (CDQ). Cov cim tseem ceeb ntawm lub cev muaj xws li: lub zog tawg (M40)> 85%, kev puas tsuaj (M10) <8%, thiab porosity tswj ntawm 35-45%. Cov kev ntsuas no ncaj qha cuam tshuam rau cupola rauv permeability, melting efficiency, thiab molten hlau zoo.
Lub koom haum International Foundry Association (IFA) faib cov coke rau hauv peb qib: qib premium rau siab-kawg precision casting, Qib 1 rau tsheb qhov chaw casting, thiab Qib 2 rau kev tsim casting. Xaiv cov qib uas tsim nyog tuaj yeem ua rau kom muaj kev ua haujlwm melting los ntawm 15-20% thiab txo tag nrho lub zog siv los ntawm 8-12%. Nrog rau kev loj hlob ib puag ncig kev cai, qhov kev thov rau qis -emission foundry coke (tsawg leej faj thiab tsis muaj nitrogen) tau nce sai, nthuav tawm qhov kev loj hlob txhua xyoo ntawm 18%.
