Kaolin ma'adinai ne na yumbu gama gari a duniyar halitta. Yana da ma'adinai mai amfani ga farin pigment, sabili da haka, fari shine muhimmiyar ma'auni mai tasiri akan darajar kaolin. Akwai baƙin ƙarfe, kwayoyin halitta, abubuwa masu duhu da sauran ƙazanta a cikin kaolin. Wadannan ƙazanta za su sa kaolin ya bayyana launuka daban-daban, yana rinjayar farin. Don haka dole ne kaolin ya cire datti.
Hanyoyin tsarkakewa na yau da kullun na kaolin sun haɗa da rabuwar nauyi, rabuwar maganadisu, flotation, maganin sinadarai, da dai sauransu. Waɗannan su ne hanyoyin tsarkakewa na gama gari na kaolin:
1. Rabuwar nauyi
Hanyar rabuwar nauyi galibi tana AMFANI da bambanci mai yawa tsakanin ma'adinan gangue da kaolin don cire ƙazanta masu yawa na kwayoyin halitta mai haske, quartz, feldspar da abubuwan da ke ɗauke da ƙarfe, titanium da manganese, don rage tasirin ƙazanta akan fari. Yawanci ana amfani da na'urori na tsakiya don cire ƙazanta masu yawa. Hakanan za'a iya amfani da rukunin hydrocyclone don gama wankewa da tantancewar kaolin a cikin tsarin rarrabuwa, wanda ba zai iya cimma manufar wankewa da grading kawai ba, har ma da cire wasu ƙazanta, waɗanda ke da ƙimar aikace-aikacen mai kyau.
Koyaya, yana da wahala a sami ingantattun samfuran kaolin ta hanyar rabuwa, kuma samfuran da suka cancanta dole ne a samo su ta hanyar rabuwar maganadisu, flotation, calcination da sauran hanyoyin.
2. Magnetic rabuwa
Kusan dukkan nau'ikan kaolin sun ƙunshi ƙaramin ƙarfe na ƙarfe, gabaɗaya 0.5-3%, galibi magnetite, ilmenite, siderite, pyrite da sauran ƙazantattun launuka. Rabuwar maganadisu yafi AMFANI da bambancin maganadisu tsakanin gangue ma'adinai da kaolin don cire waɗannan ƙazanta masu launi.
Don magnetite, ilmenite da sauran ma'adinan maganadisu masu ƙarfi ko ƙarfe na ƙarfe gauraye a cikin tsarin sarrafawa, ta amfani da hanyar rabuwar maganadisu don raba kaolin ya fi tasiri. Ga ma'adanai masu rauni na maganadisu, akwai manyan hanyoyi guda biyu: ɗaya shine gasa, sanya shi zama ma'adinan ƙarfe mai ƙarfi na Magnetic oxide, sa'an nan kuma yana ɗaukar rabuwar maganadisu; Wata hanya kuma ita ce ta yin amfani da hanyar rarrabuwar kawuna mai girma na Magnetic filin don rabuwar maganadisu. Saboda rabuwar maganadisu baya buƙatar amfani da sinadarai, yanayin ba zai haifar da gurɓata ba, don haka a cikin aiwatar da aikin ma'adinan da ba na ƙarfe ba ana amfani da shi sosai. Hanyar rabuwar maganadisu ta magance matsalar yadda ake amfani da ita da kuma amfani da ƙananan kaolin wanda ba shi da darajar haƙar ma'adinai na kasuwanci saboda yawan abun ciki na baƙin ƙarfe.
Koyaya, yana da wahala a sami samfuran kaolin masu girma ta hanyar rarrabuwar maganadisu kaɗai, kuma ana buƙatar jiyya na sinadarai da sauran matakai don ƙara rage abubuwan ƙarfe a cikin samfuran kaolin.
3. Hawaye
Hanyar flotation galibi tana amfani da bambance-bambancen zahiri da sinadarai tsakanin ma'adinan gangue da kaolin don magance danyen takin kaolin tare da ƙarin ƙazanta da ƙarancin fari, da kuma cire ƙazantattun abubuwan da ke ɗauke da ƙarfe, titanium da carbon, don gane cikakken amfani da ƙarancin daraja. albarkatun kaolin.
Kaolin ma'adinin yumbu ne na yau da kullun. Abubuwan ƙazanta irin su ƙarfe da titanium galibi ana haɗa su a cikin barbashi na kaolin, don haka ɗanyen takin dole ne a niƙa shi zuwa wani ɗanɗano mai kyau. Kaolinite da aka saba amfani da hanyar flotation don ultra lafiya barbashi flotation hanya, biyu ruwa Layer flotation hanya da zaɓi flocculation flotation hanya, da dai sauransu.
Ruwan ruwa na iya haɓaka farin kaolin yadda ya kamata, yayin da rashin lahani shi ne cewa yana buƙatar reagents na sinadarai kuma yana kashe kuɗi mai yawa, cikin sauƙi don haifar da gurɓatawa.
4. Magungunan sinadarai
Leaching sinadaran: wasu ƙazanta a cikin kaolin za a iya narkar da su ta hanyar sulfuric acid, hydrochloric acid, nitric acid da sauran abubuwan leaching don cire ƙazanta. Ana iya amfani da wannan hanya don cire hematite, limonite da siderite daga ƙananan kaolin.
Bleaching na sinadarai: ana iya sanya dattin da ke cikin kaolin su zama abubuwa masu narkewa ta hanyar bleaching, wanda za'a iya wankewa da cirewa don inganta farin kayan kaolin. Koyaya, bleaching sinadarai yana da ɗan tsada kuma galibi ana amfani dashi a cikin tattarawar kaolin, wanda ke buƙatar ƙarin tsarkakewa bayan ƙazanta.
Roasting tsarkakewa: Bambanci a cikin sinadaran abun da ke ciki da reactivity tsakanin ƙazanta da kaolin za a iya amfani da magnetization roasting, high-zazzabi roasting ko chlorination roasting don cire datti kamar baƙin ƙarfe, carbon da sulfide a cikin kaolin. Wannan hanya za ta iya inganta aikin sinadarai na samfuran calcined, inganta fararen kaolin sosai, da samun samfuran kaolin masu daraja. Amma rashin amfanin gasasshen tsarkakewa shine yawan amfani da makamashi yana da yawa, mai sauƙin haifar da gurɓatar muhalli.
Ta hanyar fasaha ɗaya yana da wahala a sami babban adadin kaolin mai girma. Saboda haka, a cikin ainihin samarwa, muna ba da shawarar ku zaɓi ƙwararrun masana'antun sarrafa kayan ma'adinai. Gudanar da gwajin sarrafa ma'adinai da amfani da fasahohin sarrafawa da yawa don haɓaka ingancin Kaolin.
Lokacin aikawa: Afrilu-06-2020