Bentonite hmoov ntau yam kev sib txuas lus ua rau lub pwm muaj zog dua qhov ua tiav ntawm qhov chaw thiab kev ruaj khov ntawm cov khoom siv hlau
Kev Piav Qhia Luv:
Hmoov Bentonite yog ib qho av nplaum uas tshwm sim los ntawm kev hloov pauv geological ntev ntawm cov tshauv volcanic thiab silicate pob zeb, khav txog cov qauv crystalline tshwj xeeb uas txhawb nqa nws qhov kev ua tau zoo hauv kev siv hauv kev lag luam, feem ntau yog hauv kev lag luam foundry. Cov hmoov zoo, mos no muaj cov yam ntxwv xws li kev nqus dej zoo, muaj peev xwm o, muaj peev xwm khi zoo, ruaj khov thermal zoo, thiab sib npaug, txhua yam ua rau nws yog cov khoom siv raw tsis tuaj yeem hloov pauv hauv kev ua haujlwm niaj hnub foundry. Hmoov Bentonite ua haujlwm ua lub hauv paus khi hauv cov txheej txheem xuab zeb foundry molding, ua lub hauv paus uas tuav cov xuab zeb ua ke los tsim cov pwm thiab cov cores muaj zog, qhov loj me thiab qhov tseeb rau cov txheej txheem casting hlau. Nws lub luag haujlwm hauv kev lag luam foundry txuas ntxiv mus deb tshaj qhov kev khi yooj yim, cuam tshuam txhua theem ntawm kev tsim khoom casting, los ntawm kev sib tov xuab zeb thiab pwm shaping mus rau molten hlau pouring, solidification, thiab shakeout, ncaj qha cuam tshuam rau qhov zoo ntawm cov castings tiav, kev ua haujlwm ntau lawm, thiab tag nrho cov nqi ua haujlwm rau foundries thoob ntiaj teb.
Hauv kev lag luam foundry, hmoov bentonite feem ntau yog siv rau hauv cov xuab zeb ntsuab molding, txoj kev casting uas tau txais kev pom zoo tshaj plaws thoob plaws ntiaj teb kev tsim khoom, vam khom rau kev tsim ntau yam ntawm cov hlau ferrous thiab non-ferrous castings. Xuab zeb ntsuab, feem ntau yog muaj xuab zeb silica, hmoov bentonite, dej, thiab cov khoom ntxiv me me, vam khom tag nrho rau hmoov bentonite los tsim cov kev sib txuas sib txuas ntawm cov xuab zeb ib leeg. Thaum hmoov bentonite sib xyaw nrog dej, nws cov qauv txheej txheem swells ntau heev, tsim ib daim nyias nyias, nplaum uas npog txhua lub xuab zeb me me thiab sib xyaw ua ke rau hauv ib pawg sib koom ua ke. Lub tshuab sib txuas no yog reversible thiab yoog tau, tso cai rau cov xuab zeb ntsuab sib xyaw kom yooj yim pwm rau hauv cov duab sib xyaw, compacted uniformly, thiab khaws nws cov duab thaum lub sijhawm tuav, kev thauj mus los, thiab theem tseem ceeb ntawm cov hlau molten. Yog tsis muaj hmoov bentonite, cov xuab zeb ntsuab molding yuav tsis ua haujlwm, vim tias xuab zeb xoob tsis muaj kev ruaj khov ntawm cov qauv kom tiv taus qhov kub thiab siab ntawm cov hlau molten, ua rau pwm tawg, casting defects, thiab tsis ua haujlwm ntau lawm.
Qhov kev ua tau zoo ntawm cov hmoov bentonite khi ncaj qha qhia txog lub zog ntsuab ntawm cov pwm tsim, ib qho tseem ceeb uas txhais tau tias pwm lub peev xwm los tswj nws cov duab thiab tiv taus kev hloov pauv thaum tuav tes thiab kho tshuab. Cov hmoov bentonite zoo tsim cov kev sib txuas ruaj khov tab sis pliable ntawm cov xuab zeb me me, ua kom cov pwm tsis tawg, chip, lossis poob qhov tseeb thaum raug tsiv los ntawm chaw tsim pwm mus rau cov kab nchuav, lossis thaum muab tso rau hauv cov fwj casting. Lub zog ntsuab no yog qhov tseem ceeb rau ob qho tib si me me-scale manual foundries thiab loj-scale automated casting kab, qhov twg cov pwm kev sib xws yog qhov tseem ceeb los txo qis kev cuam tshuam kev tsim khoom thiab cov nqi tsis lees paub. Cov hmoov bentonite nrog cov khoom zoo tshaj plaws o thiab khi ua kom ntseeg tau tias txawm tias cov pwm nyuaj nrog cov ntu nyias, cov qhov tob, thiab cov duab zoo nkauj tuav lawv cov duab zoo meej, ua rau muaj kev tsim cov castings nyuaj siv hauv tsheb, tshuab, kev tsim kho, thiab cov khoom siv hauv kev lag luam.
Ntxiv rau lub zog ntsuab, hmoov bentonite pab txhawb rau lub zog kub ntawm cov pwm tsim, ib qho tseem ceeb uas tso cai rau cov pwm kom tiv taus qhov kub ntawm cov hlau molten yam tsis tawg lossis deforming. Thaum cov hlau molten, hlau, lossis cov hlau tsis yog ferrous xws li txhuas thiab tooj liab raug nchuav rau hauv cov pwm, qhov kub hnyiab sai sai ua rau cov dej noo seem hauv cov xuab zeb ntsuab thiab ua rau muaj kev hloov pauv thermal hauv cov hmoov bentonite binder. Hmoov bentonite qib siab tswj nws cov qauv ruaj khov nyob rau hauv cov xwm txheej kub heev no, tiv thaiv phab ntsa pwm los ntawm kev tawg, eroding, lossis tawg thaum cov hlau molten puv lub pwm qhov thiab khov. Lub zog kub no ua kom ntseeg tau tias qhov casting khaws cov duab thiab qhov ntev ntawm cov pwm, tshem tawm cov qhov tsis zoo xws li hlau nkag mus, xuab zeb suav nrog, thiab kev cuam tshuam qhov ntev uas yuav ua rau castings tsis siv tau. Foundries vam khom hmoov bentonite los xa cov zog kub sib xws thoob plaws txhua qhov kev khiav casting, ua kom ntseeg tau tias txhua daim ua tau raws li cov qauv nruj thiab zoo.
Lwm yam khoom tseem ceeb ntawm bentonite hmoov hauv kev siv foundry yog nws qhov kev sib sau ua ke zoo heev, uas ua rau cov txheej txheem tom qab casting yooj yim dua thiab txo cov neeg ua haujlwm thiab cov khoom siv hnav. Tom qab cov hlau molten khov thiab txias rau qhov kub uas tswj tau, cov pwm xuab zeb sib txuas yuav tsum tau tawg ua ke kom rho tawm cov casting tiav, thiab cov xuab zeb rov ua dua tshiab rau kev siv dua. Bentonite hmoov cov qauv khi tsis muaj zog thaum pwm txias, cia cov xuab zeb tawg yooj yim hauv qab kev co lossis kev cuam tshuam thaum lub sijhawm shakeout, yam tsis tawm cov xuab zeb tawv ncauj, tawv tawv lo rau ntawm qhov chaw casting. Qhov kev sib sau ua ke zoo tshaj plaws no tsis yog tsuas yog ua kom cov khoom tsim tau sai dua los ntawm kev txo lub sijhawm siv rau kev rho tawm casting tab sis kuj txo qhov kev puas tsuaj rau castings thaum lub sijhawm demolding, xws li khawb, dents, lossis cov npoo tawg. Tsis tas li ntawd, bentonite hmoov pab txhawb kev rov ua dua xuab zeb zoo, vim tias cov xuab zeb tawg tuaj yeem yooj yim tshuaj xyuas, ntxuav, thiab rov sib xyaw nrog cov hmoov bentonite tshiab thiab dej, txo cov khoom siv raw pov tseg thiab txo cov nqi tsim khoom rau cov foundries ntawm txhua qhov loj me.
Hmoov Bentonite kuj tseem ua lub luag haujlwm tseem ceeb hauv kev txhim kho qhov tiav ntawm cov hlau cam khwb cia, qhov tseem ceeb zoo metric uas txiav txim siab qhov tsim nyog ntawm cov castings rau kev siv zaum kawg yam tsis muaj kev siv tshuab thib ob. Qhov loj me me thiab kev sib xyaw ua ke ntawm cov hmoov bentonite ua kom ntseeg tau tias cov xuab zeb ntsuab sib xyaw ua rau cov pwm du, ntom ntom nrog qhov tsawg kawg nkaus porosity thiab tsis sib xws. Thaum cov hlau molten ntws mus rau hauv qhov pwm du no, nws rov ua cov pwm qhov nto zoo, ua rau cov castings nrog huv si, txawm tias qhov chaw tsis muaj cov qhov xuab zeb, cov thaj chaw ntxhib, thiab lwm yam qhov tsis zoo ntawm qhov chaw. Qhov tiav ntawm qhov chaw zoo no txo qhov xav tau kev siv tshuab kim thiab siv sijhawm ntau, sib tsoo, thiab polishing, ua kom cov txheej txheem ntau lawm yooj yim dua thiab txhim kho kev tsim khoom tag nrho. Rau cov castings precision siv hauv cov cav tsheb, cov tshuab hydraulic, thiab cov tshuab precision, qhov tiav ntawm qhov chaw du uas ua los ntawm hmoov bentonite yog qhov tseem ceeb rau kev ua kom haum, ua haujlwm, thiab kev ua tau zoo ntawm cov khoom kawg.
Hauv kev tsim cov foundry cores, uas yog siv los tsim cov qhov hauv, qhov, thiab cov geometries sab hauv nyuaj hauv castings, bentonite hmoov ua haujlwm ua tus neeg sawv cev txhim khu kev qha rau cov xuab zeb sib xyaw. Cores ntsib cov xwm txheej nyuaj dua li cov pwm sab nraud, vim tias lawv nyob ib puag ncig los ntawm cov hlau molten thiab raug rau qhov kub siab ntev thaum lub sijhawm casting. Bentonite hmoov muab lub zog tsim nyog thiab thermal stability rau cores, tiv thaiv lawv los ntawm kev hloov pauv, tawg, lossis disintegrating thaum lub sijhawm hlau pouring thiab solidification. Qhov no ua kom ntseeg tau tias cov yam ntxwv sab hauv ntawm castings tau tsim kom raug, nrog rau qhov ntev sib xws thiab du sab hauv nto. Bentonite hmoov-raws li cov xuab zeb sib xyaw ua ke yooj yim los npaj, pwm, thiab ci, muab lwm txoj hauv kev pheej yig rau cov cores-bonded rau ntau tus qauv casting daim ntawv thov, ua rau nws yog ib qho tseem ceeb hauv ob qho tib si me me jobbing foundries thiab loj scale ntau lawm foundries.
Qhov kev hloov pauv ntawm bentonite hmoov ua rau nws haum rau txhua hom hlau casting txheej txheem hauv kev lag luam foundry, npog cov hlau ferrous xws li grey hlau, ductile hlau, thiab carbon hlau, nrog rau cov hlau tsis yog ferrous suav nrog aluminium alloys, tooj dag, thiab tooj dag. Txhua hom hlau xav tau cov yam ntxwv pwm tshwj xeeb, thiab bentonite hmoov tuaj yeem tsim kho kom tau raws li cov kev xav tau tshwj xeeb no los ntawm kev kho qhov sib xyaw nrog xuab zeb thiab dej, lossis los ntawm kev siv cov qib hmoov bentonite tshwj xeeb. Rau hlau casting, uas cuam tshuam nrog cov hlau kub siab heev, bentonite hmoov muab lub zog kub tshwj xeeb thiab thermal stability los tiv thaiv pwm tsis ua haujlwm. Rau txhuas thiab lwm yam hlau casting tsis yog ferrous, bentonite hmoov xa cov pwm du thiab collapsibility zoo heev, ua kom ntseeg tau tias zoo, tsis muaj qhov tsis xws luag castings nrog cov ntsiab lus zoo ntawm qhov chaw. Qhov kev hloov pauv no tshem tawm qhov xav tau ntau tus neeg sawv cev tshwj xeeb, ua kom yooj yim rau kev tswj hwm cov khoom siv raw foundry thiab txo qhov nyuaj ntawm kev ua haujlwm.
Cov hmoov bentonite sib txawv raug ua tiav los ua kom tau raws li qhov xav tau ntawm kev lag luam thoob ntiaj teb, nrog txhua qib tsim los muab cov yam ntxwv kev ua tau zoo rau ntau daim ntawv thov casting. Sodium bentonite hmoov, qib siv feem ntau hauv cov chaw tsim khoom, muaj peev xwm o, lub zog khi, thiab thermal stability, ua rau nws zoo tagnrho rau cov khoom siv ferrous hlau casting siab, kub siab. Nws cov dej nqus thiab cov khoom khi muaj zog ua kom muaj zog pwm thiab kev ua tau zoo, txawm tias nyob rau hauv cov kab loj loj automated foundry. Calcium bentonite hmoov, thaum muaj peev xwm o me ntsis qis dua, muab kev ua tau zoo khi thiab kev siv nyiaj tsawg, ua rau nws haum rau cov chaw tsim khoom me me, cov hlau tsis yog ferrous, thiab cov ntawv thov uas tsis tas yuav tiv taus kub heev. Activated bentonite hmoov, ua tiav los txhim kho nws cov khoom khi thiab o, muaj kev ua tau zoo rau kev casting precision, thin-walled castings, thiab cov khoom sib xyaw ua ke, qhov twg pwm zoo thiab casting raug yog qhov tseem ceeb.
Kev ua thiab kev tswj xyuas zoo ntawm cov hmoov bentonite rau kev siv hauv kev tsim khoom yog qhov nruj heev, kom ntseeg tau tias nws ua tau raws li cov qauv kev ua tau zoo uas xav tau rau cov txiaj ntsig casting sib xws. Cov hlau bentonite nyoos yog rho tawm los ntawm cov khoom siv minerals uas tau xaiv zoo, tom qab ntawd tsoo, zom ua hmoov zoo, thiab purified kom tshem tawm cov khoom tsis huv xws li xuab zeb, cov organic matter, thiab lwm yam minerals uas yuav ua rau nws cov kev ua tau zoo tsis zoo. Qhov loj me ntawm cov hmoov bentonite raug tswj hwm nruj, vim tias cov khoom me me ua kom muaj kev sib kis zoo dua hauv cov xuab zeb sib xyaw, cov xuab zeb sib xyaw ua ke ntau dua, thiab lub zog pwm muaj zog dua. Cov hmoov bentonite huv si ces raug kuaj xyuas rau cov khoom tseem ceeb xws li qhov ntsuas o, lub peev xwm khi, cov dej noo, thiab kev ruaj khov thermal, nrog tsuas yog cov pawg ua tau raws li cov lus qhia zoo nruj uas tau pom zoo rau kev siv hauv kev tsim khoom. Kev tswj xyuas zoo no ua kom ntseeg tau tias txhua pawg ntawm cov hmoov bentonite muab kev ua tau zoo sib xws, tso cai rau cov chaw tsim khoom kom tswj tau cov txheej txheem tsim khoom ruaj khov thiab txo cov teeb meem casting.
Kev tuav thiab khaws cia cov hmoov bentonite kom zoo yog qhov tseem ceeb kom khaws nws cov kev ua tau zoo hauv kev siv cov khoom siv, vim tias cov dej noo thiab kev puas tsuaj ntawm lub cev tuaj yeem ua rau nws cov khoom o thiab khi tsis zoo. Cov hmoov bentonite yuav tsum khaws cia rau hauv qhov chaw qhuav, muaj cua zoo, kaw rau hauv cov ntim khoom uas tsis muaj dej noo kom tiv thaiv kev raug dej noo, nag, thiab dej nchuav. Kev nqus dej noo ntau dhau ua rau cov hmoov bentonite sib sau ua ke, txo nws cov kev sib kis hauv cov xuab zeb sib xyaw thiab ua rau lub zog pwm tsis muaj zog. Thaum lub sijhawm thauj mus los, cov hmoov bentonite yuav tsum tau tiv thaiv los ntawm kev puas tsuaj rau lub cev rau cov ntim khoom, xyuas kom cov hmoov tseem ntws tau yooj yim thiab yooj yim sib tov. Cov chaw tsim khoom feem ntau khaws cov hmoov bentonite hauv cov xwm txheej tswj hwm ze rau cov chaw molding, xyuas kom nkag tau sai thiab tswj nws qhov zoo kom txog thaum siv. Ua raws li cov txheej txheem khaws cia kom zoo ua kom cov hmoov bentonite khaws nws cov khoom ua haujlwm tag nrho, xa cov kev ua tau zoo txhua zaus nws sib xyaw rau hauv cov xuab zeb molding.
Cov txheej txheem sib tov ntawm cov hmoov bentonite nrog cov xuab zeb silica, dej, thiab lwm yam khoom ntxiv yog ib kauj ruam tseem ceeb hauv kev ua haujlwm hauv lub tuam txhab, uas cuam tshuam ncaj qha rau qhov zoo ntawm cov xuab zeb ntsuab sib tov thiab cov txiaj ntsig tom qab ntawd. Cov hmoov bentonite yuav tsum tau sib tov sib npaug nrog cov xuab zeb qhuav ua ntej kom ntseeg tau tias muaj kev faib tawm sib npaug, ua raws li kev ntxiv dej maj mam kom ua kom cov hmoov o thiab cov khoom khi. Kev sib tov ntau dhau lossis kev sib tov tsis txaus tuaj yeem ua rau lub zog pwm tsis sib xws, nrog rau cov hmoov bentonite sib tov tsis sib xws tsis tuaj yeem khi cov xuab zeb zoo, thiab kev sib tov ntau dhau ua rau muaj kev sib xyaw ntau dhau thiab txo cov pwm permeability. Cov tuam txhab niaj hnub no siv cov txheej txheem sib tov xuab zeb tsis siv neeg los xyuas kom meej tias muaj kev tswj hwm qhov tseeb ntawm lub sijhawm sib tov, qhov ceev, thiab cov khoom xyaw sib piv, ua kom zoo dua qhov kev ua tau zoo ntawm cov hmoov bentonite thiab tsim cov xuab zeb ntsuab sib xws.
Hauv kev xaus lus, hmoov bentonite sawv cev rau lub hauv paus tseem ceeb ntawm kev lag luam thoob ntiaj teb, ua tus neeg sawv cev tseem ceeb rau kev sib txuas ntawm cov xuab zeb ntsuab thiab ua rau muaj kev tsim khoom zoo thiab pheej yig ntawm cov hlau castings. Nws qhov kev sib xyaw ua ke ntawm lub peev xwm sib txuas, cov khoom zoo heev, kev ruaj khov thermal, kev sib npaug permeability, thiab kev sib sau ua ke zoo ua rau nws tsim nyog rau kev ua kom tau raws li qhov xav tau ntawm cov hlau ferrous thiab cov hlau tsis yog ferrous. Txij li cov chaw tsim khoom me me mus rau cov chaw tsim khoom loj, hmoov bentonite ua lub luag haujlwm tseem ceeb hauv kev tsim txhua theem ntawm cov txheej txheem casting, ncaj qha cuam tshuam rau qhov zoo ntawm casting, kev ua haujlwm zoo, thiab kev ua haujlwm ruaj khov.
Cov av nplaum ua kom nquag yog cov khoom siv adsorbent ua los ntawm cov av nplaum (feem ntau yog bentonite) ua cov khoom siv raw, uas tau kho los ntawm inorganic acidification, tom qab ntawd yaug thiab ziab los ntawm dej. Nws yog mis nyuj dawb hmoov zoo li, tsis muaj ntxhiab, tsis muaj saj, tsis muaj tshuaj lom, nrog kev ua haujlwm adsorption muaj zog, thiab tuaj yeem nqus cov xim thiab cov organic. Nws yooj yim nqus cov dej noo hauv huab cua. Yog tias nws tso ntev dhau, nws cov kev ua haujlwm adsorption yuav raug txo qis. Txawm li cas los xij, thaum cua sov tshaj 300 ℃, dej siv lead ua yuav ploj mus, uas yuav hloov cov qauv thiab cuam tshuam rau qhov fading nyhuv. Cov av nplaum ua kom nquag yog insoluble hauv dej, cov kuab tshuaj organic thiab ntau yam roj, yuav luag tag nrho soluble hauv caustic soda thiab hydrochloric acid, nrog qhov ceev ntawm 2.3-2.5, thiab me ntsis bentonite hauv dej thiab roj.
Cov khoom siv av nplaum ua haujlwm
1. Nws muaj qhov zoo ntawm kev nqus tau zoo, kev hloov pauv xim siab, kev nqa roj tsawg, kev lim dej ceev thiab kev ntxiv tsawg dua;
2. Nws tuaj yeem tshem tawm tag nrho cov phospholipid, xab npum thiab cov hlau ions ntawm cov roj thiab tuaj yeem siv ua cov tshuaj antioxidant ntuj;
3. Nws tuaj yeem tshem tawm cov aflatoxin, cov tshuaj tua kab thiab lwm yam tshuaj lom thiab cov ntxhiab tsw txawv hauv cov roj;
4. Tom qab decolorization, cov kua qaub ntawm cov roj tsis nce, tsis rov qab mus rau xim, yog meej thiab pob tshab, thiab muaj kev ruaj khov zoo thiab lub neej ntev.
5. Nws yog qhov tshwj xeeb tshaj yog rau kev ua kom huv thiab tsim cov roj av, roj zaub thiab roj tsiaj.
Yam ntxwv ntawm cov av nplaum ua haujlwm
1. Cov av dawb yog ua los ntawm cov av nplaum attapulgite zoo uas tsis yog hlau thiab yog cov khoom siv tseem ceeb, ntxiv los ntawm cov mis tshuaj thiab ua kom zoo los ntawm cov txheej txheem ua tshwj xeeb. Nws zoo li hmoov grey dawb lossis hmoov daj daj, uas yog lwm txoj hauv kev zoo tshaj plaws rau cov pa roj carbon activated.
2. Cov av dawb muaj ntau yam kev ua tau zoo ntawm kev tshem tawm xim, muaj peev xwm tshem tawm xim zoo, muaj peev xwm nqus tau thiab ntxuav tau zoo, thiab muaj peev xwm nqus tau cov xim thiab cov khoom tsis huv.
3. Cov av bleaching muaj kev ruaj khov hauv daim ntawv thov, thiab nws yooj yim heev thiab muaj kev nyab xeeb rau kev siv, tsis hloov cov txheej txheem tsim khoom qub ntawm cov tuam txhab tsim khoom.
4. Lub ncuav mog qab zib lim los ntawm cov av dawb tuaj yeem siv dua yam tsis muaj kuab paug rau ib puag ncig.
5. Cov av uas ua kom dawb muaj qhov nrawm ntawm kev tshem xim, qhov nrawm ntawm kev nqa roj tsawg, kev lim dej sai thiab cov kua qaub dawb tsawg.
Pob khoom
Sau koj cov lus ntawm no thiab xa tuaj rau peb
