Roasting is a process in which the ore is rated in muaj huab cua.
Yuav ua li cas ore roasting tiav?
Sulphide ores yog roasted los hloov lawv cov oxides, vim oxides tau yooj yim txo rau hlau dua sulphides.
Vim li cas roasting exothermic?
Cov txheej txheem ntawm cov cua kub ntawm cov ore mus rau qhov kub thiab txias nyob rau hauv lub xub ntiag ntawm huab cua yog hu ua roasting. Yog li, nqe lus 'nws yog txheej txheem ntawm cov cua sov ore hauv huab cua kom tau txais cov oxide' yog qhov tseeb. Thaum lub sij hawm ci, ntau cov kua qaub, nws yog xim hlau thiab lwm yam tshuaj lom neeg raug tso tawm. Yog li, roasting yog txheej txheem exothermic.
txheej txheem cua sov yog dab tsi?
Smelting yog txheej txheem ntawm cua sov cov hlau los ntawm nws cov ore tshaj nws qhov melting point. Qhov no yog ua nyob rau hauv lub xub ntiag ntawm oxidizing agents los yog txo tus neeg sawv cev. … Cov hlau uas muaj oxidized impurities yog purified siv ib txoj kev hu ua poling. Tooj liab los yog tin yog purified los ntawm nws cov tooj liab ores tin ores.
Vim li cas thiaj ci tau cua?
(a) Roasting yog txheej txheem uas cov ores tau rhuab mus rau qhov kub uas qis dua nws qhov melting point. Qhov no tshwm sim nyob rau hauv lub xub ntiag ntawm huab cua nyob rau hauv xaj kom oxidize cov impurities. … Cov impurities tsis zoo li arsenic raug tshem tawm los ntawm cov txheej txheem no. Roasting yog txoj kev siv rau sulfide ores.
Chemical reduction of ore by Roasting
