Lub hauv paus ntsiab lus ntawm muffle furnace calcination

Muffle furnace calcination: kev kho cua sov hauv huab cua los yog inert roj ntawm qhov kub thiab txias, hu ua calcination lossis roasting

Lub ntsiab lub cev thiab tshuaj hloov pauv hauv cov txheej txheem muffle furnace calcination yog:

(1) Thermal decomposition: tshem tawm chemically khi dej, CO2, NOx thiab lwm yam volatile impurities. Ntawm qhov kub siab dua, cov oxides kuj tuaj yeem ua rau lub zog-theem cov tshuaj tiv thaiv los ua ib qho kev sib xyaw ua haujlwm;

(2) Recrystallization: Ib qho crystal zoo, siv lead ua loj, pore qauv thiab qhov chaw tshwj xeeb tuaj yeem tau txais;

(3) Cov crystallites yog sintered kom zoo los txhim kho cov neeg kho tshuab lub zog.

Lub ntsiab yam tseem ceeb uas cuam tshuam rau cov txheej txheem calcination: calcination kub, roj theem muaj pes tsawg leeg, thermal stability ntawm lub compound, thiab lwm yam. Yog li ntawd, raws li thermal stability ntawm ntau lub tebchaw (xws li carbonate, oxide, hydroxide-sulfide, oxyacid ntsev, thiab lwm yam. ), calcination kub thiab roj theem muaj pes tsawg leeg tuaj yeem tswj tau los xaiv hloov cov thermal stability ntawm qee cov tebchaw. Cov muaj pes tsawg leeg los yog siv lead ua daim ntawv hloov pauv, thiab tom qab ntawd kho nrog cov txheej txheem sib xws, tuaj yeem ua tiav lub hom phiaj ntawm kev tshem tawm impurities thiab sib cais thiab ua kom cov pab pawg muaj txiaj ntsig zoo.