Kaolin yog ib qho av nplaum uas muaj ntau nyob hauv ntiaj teb ntuj. Nws yog cov av nplaum uas muaj txiaj ntsig zoo rau cov xim dawb, yog li ntawd, qhov dawb yog ib qho tseem ceeb uas cuam tshuam rau tus nqi ntawm kaolin. Muaj hlau, cov organic matter, cov khoom tsaus thiab lwm yam tsis huv hauv kaolin. Cov tsis huv no yuav ua rau kaolin tshwm sim ntau xim, cuam tshuam rau qhov dawb. Yog li kaolin yuav tsum tshem tawm cov tsis huv.
Cov txheej txheem ntxuav kaolin feem ntau suav nrog kev sib cais ntawm lub ntiajteb txawj nqus, kev sib cais sib nqus, kev ntab dej, kev kho tshuaj lom neeg, thiab lwm yam. Cov hauv qab no yog cov txheej txheem ntxuav kaolin feem ntau:
1. Kev sib cais ntawm lub ntiajteb txawj nqus
Txoj kev sib cais ntawm lub ntiajteb txawj nqus feem ntau siv qhov sib txawv ntawm qhov ceev ntawm cov pob zeb gangue thiab kaolin kom tshem tawm cov khoom tsis huv ntawm cov khoom siv organic, quartz, feldspar thiab cov khoom muaj hlau, titanium thiab manganese, kom txo qhov cuam tshuam ntawm cov khoom tsis huv ntawm qhov dawb. Cov tshuab centrifugal feem ntau yog siv los tshem tawm cov khoom tsis huv ntawm qhov ceev. Pawg hydrocyclone kuj tseem siv tau los ua kom tiav kev ntxuav thiab tshuaj ntsuam ntawm kaolin hauv cov txheej txheem ntawm kev txheeb xyuas, uas tsis tsuas yog ua tiav lub hom phiaj ntawm kev ntxuav thiab qib, tab sis kuj tshem tawm qee qhov tsis huv, uas muaj tus nqi thov zoo.
Txawm li cas los xij, nws nyuaj rau kom tau txais cov khoom kaolin tsim nyog los ntawm txoj kev sib cais, thiab cov khoom tsim nyog kawg yuav tsum tau txais los ntawm kev sib cais sib nqus, kev ntab, kev calcination thiab lwm txoj kev.
2. Kev sib cais sib nqus
Yuav luag txhua cov kaolin ores muaj me ntsis ntawm cov hlau ore, feem ntau 0.5-3%, feem ntau yog magnetite, ilmenite, siderite, pyrite thiab lwm yam xim tsis huv. Kev sib cais sib nqus feem ntau siv qhov sib txawv sib nqus ntawm cov pob zeb gangue thiab kaolin kom tshem tawm cov xim tsis huv no.
Rau cov magnetite, ilmenite thiab lwm yam khoom muaj zog sib nqus lossis cov hlau nplaum sib xyaw hauv cov txheej txheem ua, siv txoj kev sib cais sib nqus los cais kaolin zoo dua. Rau cov khoom muaj zog sib nqus tsis muaj zog, muaj ob txoj hauv kev tseem ceeb: ib qho yog ci, ua kom nws dhau los ua cov hlau oxide sib nqus muaj zog, tom qab ntawd nqa kev sib cais sib nqus; Lwm txoj hauv kev yog siv txoj kev sib cais sib nqus magnetic field siab gradient rau kev sib cais sib nqus. Vim tias kev sib cais sib nqus tsis tas yuav siv cov tshuaj lom neeg, ib puag ncig yuav tsis ua rau muaj kuab paug, yog li thaum lub sijhawm ua cov khoom tsis yog hlau, kev siv dav dua. Txoj kev sib cais sib nqus tau daws qhov teeb meem ntawm kev siv thiab kev siv cov kaolin qis uas tsis muaj txiaj ntsig rau kev lag luam vim muaj cov hlau ntau.
Txawm li cas los xij, nws nyuaj rau kom tau txais cov khoom kaolin qib siab los ntawm kev sib cais sib nqus ib leeg, thiab kev kho tshuaj thiab lwm yam txheej txheem yog qhov xav tau los txo cov ntsiab lus ntawm cov hlau hauv cov khoom kaolin.
3. Kev ntab dej
Txoj kev flotation feem ntau siv qhov sib txawv ntawm lub cev thiab tshuaj ntawm cov zaub mov gangue thiab kaolin los kho cov kaolin ore nrog ntau yam tsis huv thiab qis dua dawb, thiab tshem tawm cov tsis huv uas muaj hlau, titanium thiab carbon, kom paub txog kev siv cov peev txheej kaolin qis.
Kaolin yog ib qho av nplaum uas ib txwm muaj. Cov khoom tsis huv xws li hlau thiab titanium feem ntau nyob hauv cov kaolin me me, yog li cov hlau nyoos yuav tsum tau zom kom txog qee qib ntawm qhov zoo. Kaolinite feem ntau siv txoj kev flotation rau txoj kev flotation me me, ob txheej kua flotation thiab txoj kev flotation xaiv, thiab lwm yam.
Kev ua kom cov kaolin dawb tuaj yeem ua rau cov kaolin dawb zoo dua, thaum qhov tsis zoo yog tias nws xav tau cov tshuaj reagents thiab kim heev, yooj yim ua rau muaj kuab paug.
4. Kev kho mob tshuaj
Kev siv tshuaj lom neeg: qee cov khoom tsis huv hauv kaolin tuaj yeem yaj los ntawm sulfuric acid, hydrochloric acid, nitric acid thiab lwm yam tshuaj ntxuav kom tshem tawm cov khoom tsis huv. Txoj kev no siv tau los tshem tawm hematite, limonite thiab siderite ntawm cov kaolin qib qis.
Kev tshuaj dawb: cov khoom tsis huv hauv kaolin tuaj yeem oxidized rau hauv cov khoom yaj los ntawm kev tshuaj dawb, uas tuaj yeem ntxuav thiab tshem tawm kom txhim kho qhov dawb ntawm cov khoom kaolin. Txawm li cas los xij, kev tshuaj dawb yog kim heev thiab feem ntau yog siv rau hauv kaolin concentrate, uas xav tau kev ntxuav ntxiv tom qab tshem tawm cov kuab paug.
Kev ntxuav kom huv: qhov sib txawv ntawm cov tshuaj lom neeg thiab kev ua haujlwm ntawm cov khoom tsis huv thiab kaolin tuaj yeem siv rau kev sib nqus ci, kev ci kub siab lossis kev ci chlorination kom tshem tawm cov khoom tsis huv xws li hlau, carbon thiab sulfide hauv kaolin. Txoj kev no tuaj yeem txhim kho cov tshuaj lom neeg ntawm cov khoom calcined, txhim kho qhov dawb ntawm kaolin, thiab tau txais cov khoom kaolin zoo. Tab sis qhov tsis zoo ntawm kev ntxuav kom huv yog tias kev siv hluav taws xob ntau, yooj yim ua rau muaj kuab paug rau ib puag ncig.
Los ntawm kev siv tshuab ib zaug xwb, nws nyuaj rau kom tau cov kaolin concentrates zoo. Yog li ntawd, thaum tsim khoom tiag tiag, peb xav kom koj xaiv lub chaw tsim khoom siv ua cov khoom siv ua cov ntxhia uas tsim nyog. Ua qhov kev sim ua cov ntxhia thiab siv ntau yam thev naus laus zis ua kom zoo dua ntawm Kaolin.
Lub sijhawm tshaj tawm: Plaub Hlis-06-2020