Kaolin ma'adinai ne da aka saba amfani da shi a duniyar halitta. Ita ce ma'adinai mai amfani ga launin fari, saboda haka, fari muhimmin ma'auni ne da ke tasiri ga ƙimar kaolin. Akwai ƙarfe, abu mai rai, abu mai duhu da sauran ƙazanta a cikin kaolin. Waɗannan ƙazanta za su sa kaolin ya bayyana launuka daban-daban, yana shafar farin. Don haka kaolin dole ne ya cire ƙazanta.
Hanyoyin tsarkakewa na kaolin da aka saba amfani da su sun haɗa da rabuwar nauyi, rabuwar maganadisu, flotation, maganin sinadarai, da sauransu. Ga hanyoyin tsarkakewa na kaolin da aka saba amfani da su:
1. Rabuwar nauyi
Hanyar rabuwar nauyi tana AMFANI da bambancin yawa tsakanin ma'adinan gangue da kaolin don cire ƙazanta mai yawa na abubuwa masu haske na halitta, quartz, feldspar da abubuwan da ke ɗauke da ƙarfe, titanium da manganese, don rage tasirin ƙazanta akan farin. Yawanci ana amfani da masu haɗa centrifugal don cire ƙazanta mai yawa. Hakanan ana iya amfani da rukunin hydrocyclone don kammala wankewa da tantance kaolin yayin aiwatar da rarrabuwa, wanda ba wai kawai zai iya cimma manufar wankewa da tantancewa ba, har ma da cire wasu ƙazanta, wanda ke da ƙimar amfani mai kyau.
Duk da haka, yana da wuya a sami samfuran kaolin masu cancanta ta hanyar hanyar sake raba su, kuma dole ne a sami samfuran da suka cancanta ta ƙarshe ta hanyar rabuwar maganadisu, flotation, calcination da sauran hanyoyi.
2. Rabuwar maganadisu
Kusan dukkan ma'adanai na kaolin suna ɗauke da ƙaramin adadin ma'adinan ƙarfe, gabaɗaya kashi 0.5-3%, galibi magnetite, ilmenite, siderite, pyrite da sauran ƙazanta masu launi. Rabawar maganadisu galibi tana AMFANI da bambancin maganadisu tsakanin ma'adinan gangue da kaolin don cire waɗannan ƙazanta masu launi.
Ga magnetite, ilmenite da sauran ma'adanai masu ƙarfi na maganadisu ko kuma filing na ƙarfe da aka haɗa a cikin tsarin sarrafawa, 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 a gasa, a sa shi ya zama ma'adanai masu ƙarfi na maganadisu, sannan a ci gaba da rabuwar maganadisu; Wata hanya kuma ita ce a yi amfani da hanyar rabuwar maganadisu mai tsayi don rabuwar maganadisu. Saboda rabuwar maganadisu ba ta buƙatar amfani da sinadarai, muhalli ba zai haifar da gurɓatawa ba, don haka a cikin tsarin sarrafa ma'adanai marasa ƙarfe ana amfani da shi sosai. Hanyar rabuwar maganadisu ta magance matsalar amfani da kaolin mai ƙarancin daraja wanda ba shi da darajar hakar ma'adinai na kasuwanci saboda yawan sinadarin ƙarfe.
Duk da haka, yana da wuya a sami samfuran kaolin masu inganci ta hanyar rabuwar maganadisu kawai, kuma ana buƙatar maganin sinadarai da sauran hanyoyin don ƙara rage yawan sinadarin ƙarfe a cikin samfuran kaolin.
3. Tashi a kan ruwa
Hanyar yin iyo galibi tana amfani da bambance-bambancen zahiri da na sinadarai tsakanin ma'adanai na gangue da kaolin don magance ƙarancin ƙazanta da ƙarancin fari, da kuma cire ƙazanta da ke ɗauke da ƙarfe, titanium da carbon, don cimma cikakken amfani da albarkatun kaolin masu ƙarancin daraja.
Kaolin wani ma'adinai ne na yumbu. Ana samun ƙazanta kamar ƙarfe da titanium a cikin ƙwayoyin kaolin, don haka dole ne a niƙa ma'adinan da ba a sarrafa ba zuwa wani mataki na ƙanƙanta. Hanyar flotation ta Kaolinite da aka saba amfani da ita don hanyar flotation ta barbashi mai laushi, hanyar flotation ta ruwa mai laushi biyu da hanyar flotation ta zaɓi, da sauransu.
Ruwan da ke shawagi a kan ruwa zai iya ƙara farin kaolin yadda ya kamata, yayin da rashin amfaninsa shi ne yana buƙatar sinadaran da ke cikinsa kuma yana da tsada sosai, wanda hakan zai iya haifar da gurɓatawa cikin sauƙi.
4. Maganin sinadarai
Ruwan sinadarai: wasu ƙazanta a cikin kaolin za a iya narkar da su ta hanyar amfani da sinadarin sulfuric acid, hydrochloric acid, nitric acid da sauran sinadarai masu cire ƙazanta don cire ƙazanta. Ana iya amfani da wannan hanyar don cire hematite, limonite da siderite daga ƙananan kaolin.
Yin bleaching na sinadarai: ana iya haɗa ƙazanta a cikin kaolin zuwa abubuwa masu narkewa ta hanyar bleaching, waɗanda za a iya wankewa da kuma cirewa don inganta farin kayayyakin kaolin. Duk da haka, bleaching na sinadarai yana da tsada kuma yawanci ana amfani da shi a cikin kaolin concentrate, wanda ke buƙatar ƙarin tsarkakewa bayan an goge shi.
Tsaftacewa da Gasawa: Bambancin sinadaran da amsawa tsakanin ƙazanta da kaolin za a iya amfani da su wajen gasa magnetization, gasawa a zafin jiki mai yawa ko gasa chlorine don cire ƙazanta kamar ƙarfe, carbon da sulfide a cikin kaolin. Wannan hanyar za ta iya inganta amsawar sinadarai na samfuran calcined, inganta farin kaolin sosai, da kuma samun samfuran kaolin masu inganci. Amma rashin amfanin tsarkakewa da gasawa shine yawan amfani da makamashi yana da yawa, yana da sauƙin haifar da gurɓataccen muhalli.
Ta hanyar fasaha ɗaya, yana da wuya a sami babban sinadarin kaolin. Saboda haka, a cikin ainihin samarwa, muna ba da shawarar ku zaɓi ƙwararren masana'antar sarrafa ma'adinai. Gudanar da gwajin sarrafa ma'adinai da amfani da fasahohin sarrafawa da yawa don ƙara ingancin Kaolin.
Lokacin Saƙo: Afrilu-06-2020