Nyhuv ntawm cov npoo ntawm PPT Silica rau Khoom ntawm Cov Khoom Roj Hmab
(1) Hws noo
Cov dej ntsiab lus ntawm cov ntxhuav ntawm cov dej ntau dhau muaj cov dej dawb thiab ua txhua yam dej. Dej dawb nyob rau saum npoo ntawm silica tau yooj yim muab tshem tawm thaum rhuab. Dej dawb yog tsawg dhau, qhia tias cov nplais ntawm cov silica muaj lub teeb me me pib, uas txo cov kev ua ntawm silica, thiab txhawb nqa lub aggregation ntawm silica thaum lub caij sib tov, yog li nws yog yooj yim los faib nyob rau hauv lub compound. Nrog dej tsis tshua muaj dej, tsis yog lub qhov hloov ntawm vulcanization nkaus xwb, tab sis qhov tseem ceeb ntawm kev siv zog yog txo. Dej dawb yog me ntsis dua, nws cov roj hmab tau zoo ua haujlwm zoo, ceev ceev hmoov noj ceev, tsis muaj av qeeg, yob wrapping cov cuab yeej kuj zoo, qhov ceev ntawm vulcanization yog me ntsis sai dua. Txawm li cas los xij, cov nplais ntawm vulcanizate mus npuas ntau vim muaj dej ntau, kub kub, yooj yim scorching, agglomeration thiab uneven dispersion, thiab lub cev thiab lub zog ntawm vulcanizate kuj tsis haum. Feem ntau, dej ntawm 6-8% tuaj yeem ua si tau zoo tshaj qhov kev rho tawm ntawm silica molecule, thiaj li tiv thaiv kom tsis txhob rov ua lub pob aggregation ntawm cov khoom thiab sib npaug hauv cov khoom sib xyaw kom haum, uas yog qhov zoo rau kev txhim kho cov khoom thiab kev ceev ceev . Cov dej hauv dej yog "sab hauv" ntawm silica, uas yog lub ruaj khov, thiab tshem tau tawm thaum lub ntsuas kub siab tshaj 400 C. Cov ntsiab lus yog 4.0-7.0%. Yog hais tias dej ntau dhau, nws qhia tau hais tias cov ntsiab lus hauv cov txheej txheem ntawm cov tshuaj tiv thaiv yog siab, cov khoom tiav ua muaj me ntsis, thiab qhov txuam ntawm cov roj hmab kuj tseem me me. Lub cev qhuav dej thiab qhov zom zom hauv cov txheej txheem ua rau lub cev kuj tsis zoo rau qhov cuab lub zog.
(2) tus nqi pH
Lub acidity thiab alkalinity ntawm silica muaj ib tug zoo cawv rau vulcanization ntawm roj hmab. Lub acidity ntawm silica qeeb lub vulcanization ntawm roj hmab, thaum lub alkalinity txhawb lub vulcanization, tab sis ntau alkalinity yog unfavorable rau lub reinforcement. PH yog me ntsis acidic silica, uas yog siv rau qhov nruj tsis kam thiab hnav tsis kam ntawm cov khoom siv roj hmab thiab cov khoom. Yog li no, qhov nqi ntawm cov khoom muaj nqis los ntawm roj hmab feem ntau yog 6-8, uas nyob ze rau kev tsis sib haum xeeb.
(3) Kev hloov deg
Qhov kev hloov ntawm qhov hluav taws xob ntawm lub thawv yog hais txog qhov sib ntxiv ntawm tus neeg saib xyuas ua ke nyob rau hauv silica kom ua tiav nws cov dej. Nrog rau qhov sib ntxiv ntawm tus neeg saib xyuas kev sib txuas lus, CH3O-1 (methoxy pawg) ntawm ib kawg ntawm tus neeg sawv cev sib txuas lus reacts yooj yim nrog cov silanol pawg ntawm txheej txheej ntawm silica, thiab lwm qhov kawg reacts nrog lub molecule duab duab roj hmab, uas yog, tus nyhuv bridging ntawm tus neeg sawv cev ntawm kev sib txuas ntawm silica thiab roj hmab. Muaj ntau txoj kev los hloov qhov nplais ntawm silica. Tam sim no, cov neeg ua hauj lwm kaw lus silane (xws li Si-69) feem ntau yog siv los kho cov silica.
(4) Impurities
Hauv kev npaj ntawm silicone precipitated, Cu, Fe thiab Mn yog yooj yim coj tuaj rau hauv. Txawm hais tias cov kev tsis sib haum xeeb no muaj cov nyhuv me me ntawm cov khoom siv roj hmab, cov ntsiab lus ntawm Cu, Fe thiab Mn tseem raug txo kom tsawg muaj qee yam txwv tsis pub kom cov khoom siv roj hmab muaj tshuaj tua kabmob zoo thiab muaj kev tiv thaiv kev laus. Hauv txoj kev saib ntawm no, GB 10517 hais tias txoj kev los ntawm cov thooj ntawm silica yog tooj <30 mg="" kg,="" mn=""><50 mg="" kg="" thiab="" fe=""><1000 mg="" kg.="" tsis="" tsim="" nyog="" siv="" los="" ua="" ib="" qho="" muab="" tub="" lim="" los="" yog="" hluavtaws="" hluavtaws="" vim="" nws="" cov="" ntsiab="" lus="" sodium="" siab,="" thiab="" daim="" ntawv="" tshabxo="" ntawm="" cov="" khoom="" siv="" yog="" obviously=""> Txawm li cas los, nyob rau hauv cov txheej txheem ntau lawm, cov tshuaj tiv thaiv synthesis yog tswj, cov kua gel ntau tshaj ntawm Na + yog tiv thaiv, thiab cov yaug ntawm cov khoom ua tiav slurry yog ntxiv zog. Cov ntsiab lus ntawm sodium ntsev yuav raug txo kom tsawg tshaj li 0.5%, yog li cov silica precipitated muaj me ntsis ntxim rau cov khoom ntawm cov roj hmab.
Tiv tauj peb
JINSHA PRECIPITATED SILICA MANUFACTURING CO.LTD.
Email: jk@jksilica.com
Ntxiv: Gaosha Industrial Zone, Shaxian, Fujian, Suav
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Cim npe nrov: nyhuv ntawm ppt silica ntawm cov khoom ntawm roj hmab khoom Suav teb, koom xwm, cov chaw muag khoom, tuam txhab, yuav, ua nyob rau hauv Tuam Tshoj, ShaXian Sanming
