Ukulungiselela indlela ye iphepha lemica ipulp calcining chemical pulping

I-mica eyahlukanisiweyo ibalwa kwiqondo lokushisa eliphezulu ukususa inxalenye yamanzi ekristale kwisakhiwo se-mica, ukwenzela ukuba i-mica flakes iya kwandiswa kwicala le-perpendicular kwi-cleavage surface, kwaye ukuthungwa kuya kuba thambileyo, kwaye emva koko kunyangwa ngokwekhemikhali ukwenza. i-mica flakes igcwele Ukwahlula komhlaba kuyahlukana, kwaye emva koko ihlanjwe kwaye ihlelwe ibe yi-slurry. Iphepha lemica elicoliweyo lenziwe ngale ndlela libizwa ngokuba yipowder mica paper.

a. Ukuhlela kunye nokomiswa kwemathiriyeli ekrwada ye-mica

Iimathiriyeli ekrwada ezisetyenziswa kwiphepha lendalo lemica ikakhulu zizilaphu zendalo ezityunyuziweyo zemica kunye neflake mica processing. Injongo yokuhlenga ngokukodwa kukukhupha iiflekhi zokubambelela, i-biotite, i-mica eluhlaza, kunye nezinye izinto ezingcolileyo kunye nokungcola kwamanye amazwe angafanelekanga ukwenza iphepha le-mica. Ukuqinisekisa umgangatho wokubalwa kwe-mica, ii-mica flakes ezishinyeneyo ezinobukhulu obungaphezulu kwe-1.2mm kufuneka zisuswe. I-mica ehleliweyo icocwa ngokudibanisa amanzi kwi-cylindrical screen okanye i-vibrating screen ukususa ukungcola okufana nesanti kunye nesanti kwi-mica material kunye nokuhluza izinto ezintle ezincinci kakhulu ukuhlambulula izinto ze-mica. I-mica ecocekileyo iqulethe i-20% ~ 25% yamanzi, ekufuneka isuswe ukunciphisa umxholo wamanzi aqhotyoshelweyo ngaphantsi kwe-2%. Ukomisa kuqhutyelwa kwi-dryer ekhethekileyo yebhanti, usebenzisa i-steam njengomthombo wokushisa.

b. Ukubalwa kwe mica

Beka i-mica kwisithando somlilo esithile sombane, sitshise ukuya kwi-700 ~ 800 ℃, kwaye uyigcine i-50 ~ 80min ukususa amanzi ekristale kwiikristale ze-mica, kwaye ufumane umgangatho ophezulu we-mica we-pulping. Ukubalwa kwe-mica okwangoku kusetyenziswa kakhulu kwiikhilthi zokufudumeza ezingathanga ngqo. I-calcined mica clinker idinga ukujongwa ukususa intlenga, uthuthu oluvuthayo kunye namaqhekeza e-mica kunye nobubanzi obungaphantsi kwe-6mm eyayidityaniswe ekuqaleni phakathi kwe-mica layers. Umgangatho wokubala we-mica uya kuchaphazela iipropati zombane, ukuguquguquka, ukuxhathisa ukugoqa, amandla okuqina kunye nesantya se-pulping yephepha le-mica.

c. Ukulungiswa kwe powder mica slurry

I-calcined mica (i-clinker) iphathwe ngamakhemikhali ukuze yenze i-scaly slurry enokuthi ihlakazeke emanzini kwaye imiswe ngokufanayo, kwaye ukungcola kwamanzi ahlambulukileyo kususwe ngokuhlamba ukuhlangabezana neemfuno zenkqubo yokwenza iphepha.