I-Hielscher Ultrasound Technology

I-Ultrasonically Yakhawuleza I-Gypsum Crystallization

  • Ukuhlanganiswa kwe-ultrasonic nokuhlakazeka kuyasheshisa ukukhipha i-crystallization nokusabela kokuphendula kwe-gypsum (i-CaSO4· 2H2O).
  • Ukusetshenziswa kwamandla ultrasonics kuya ku-gypsum slurry kuphuthumisa ukuklabanisa ngaleyo ndlela ukunciphisa isikhathi sokubeka.
  • Ngaphandle kokuhlelwa okusheshayo, amabhodi odonga akhiqizwa abonisa ukuncipha okuncane.
  • Ukusabalalisa kwe-ultrasonic yokuqinisa izinto zokwakha (isib. CNTs, nano-fibers noma i-silica) zibe yi-gypsum ngenxa yamandla aphezulu asebenzayo kanye ne-porosity ephansi.

 

Ultrasonics for Improved Gypsum Ukukhiqiza

Ukuze uqale ukusabela kwe-calcium sulphate hemihydrate namanzi, i-calcium sulphate hemihydrate kumele ihlakazeke ngokulinganayo emanzini ukuze kulungiselelwe ukuhlunga okufanayo. Ukusabalalisa kwe-ultrasonic kuqinisekisa ukuthi izinhlayiya zimanzi ngokugcwele ukuze i-hemihydrate ephelele ye-hydration ifinyelelwe. Ukuxubana kwe-ultrasonic ye-gypsum slurry kusheshisa isikhathi sokubeka ngenxa ye-crystallization esheshayo.
Izithako ezengeziwe ezifana nezivinjiswane kanye nokuqinisa izinto ze-nano zingabanjaniswa ngokulinganayo kwi-gypsum slurry, futhi.

Ukusebenza Isimiso se-Ultrasonic Dispersion

Amadivayisi we-Hielscher ultrasonic amathuluzi anamandla okunciphisa usayizi wezinhlayiyana (Chofoza ukuze ukhulise!)Lapho amandla amakhulu e-ultrasound ehlanganiswa abe yi-liquid noma i-slurry, i-cavitation eyenziwa nge-ultrasonically yenzeka. cavitation ultrasonic kudala izimo ezimbi kakhulu ezibandakanya amabutho aphezulu, i-jets, i-micro turbulences, izinga lokushisa eliphezulu, ukushisa nokushisa kanye nokucindezela okukhulu. Lezo zinqola zokugcoba izingqimba zinqobe amandla okubopha phakathi kwama-molecule kangangokuthi ziyaqhekeka futhi zihlakazeka njengezinhlayiya ezilodwa. Ngaphezu kwalokho, izinhlayiya ziyasheshiswa yi-jets cavitational liquid jets ukuze ziqhubekele ndawonye futhi ngaleyo ndlela ziphulwe phansi zibe yi-nano noma usayizi wezinhlayiya eziyinhloko. Lesi simo siyaziwa ngokuthi i-ultrasonic wet-milling.
I-ultrasound yamandla yenza ama-nucleation amasayithi kusixazululo ukuze i-crystallization esheshayo ifinyelelwe.
Chofoza lapha ukuze ufunde kabanzi mayelana ne-sono-crystallization – i-crystallization eyayisiza kakhulu i-ultrasonically!

Isistimu ye-ultrasound yamandla wokusabalalisa okukhulu kwevolumu

I-industrial ultrasonic disperser

Isicelo solwazi




Qaphela kwethu Inqubomgomo yobumfihlo.


Ukusabalalisa kwe-Ultrasonic kweziNgezelelo

Ezingxenyeni eziningi zamakhemikhali, i-sonication isetshenziselwa ukuxuba izithasiselo ezinjengezithako zokulinda (isib. Amaprotheni, ama-acids), ama-viscosity modifiers (isib. Ama-superplasticisers), ama-anti-burning, ama-boric acid, amakhemikhali anamanzi (isib. Ama-polysiloxanes, ama-emulsions wax) ama-glass fibers, ama-enhancer-fire resistant (isib. vermiculite, ubumba kanye / noma i-silica fumed), izinhlanganisela ze-polymeric (isib. PVA, PVOH) nezinye izithasiselo ezivamile ekusetshenzisweni ukuthuthukisa ukwakhiwa kwe-plaster, amakhemikhali ahlanganisiwe ahlanganisiwe kanye namakhemikhali e-gypsum ukunciphisa isikhathi sokubeka isikhathi.
Chofoza lapha ukuze ufunde kabanzi mayelana nokuhlanganiswa kwe-ultrasonic nokuhlanganiswa kwezithasiselo!

izinhlelo ze-industrial ultrasonic

I-Hielscher Ultrasonics ingumhlinzeki wakho ophezulu wamandla aphezulu we-ultrasonic for bench-top kanye nezicelo zezimboni. I-Hielscher inikeza amaprosesa ama-ultrasonic anamandla futhi aqinile. Wethu UIP16000 (16kW) yiyona inqubo enamandla kakhulu ye-ultrasonic emhlabeni jikelele. Loluhlelo lwe-16kW ultrasound lwenza izinqwaba ezinkulu kakhulu ze-slurries ezinama-viscous (kuze kufike ku-10,000cp). Ama-amplitudes aphezulu angafika ku-200μm (futhi aphezulu ekucekeni) aqinisekise ukuthi izinto ziphathwa ngendlela efanele ukuze izinga lokusabalalisa, ukuguqulwa nokukhwabanisa kufinyelelwe. Lokhu sonication okukhulu ikhiqiza ama-slurries we-nano-ahlaziyiwe ngama-fast setting rates kanye nemikhiqizo ephezulu ye-gypsum.
Ukuqina kwemishini ye-ultrasonic ye-Hielscher kuvumela ukusebenza komsebenzi we-24/7 emsebenzini obuthakathaka nasezindaweni ezinzima.
Ithebula elingezansi linikeza isibonakaliso somthamo wokucubungula we-ultrasonicators wethu:

Iqoqwana Ivolumu flow Rate Amadivayisi ezinconyiwe
10 kuya ku-2000mL 20 kuya ku-400mL / min UP200Ht, UP400St
0.1 kuya ku-20L 0.2 kuya ku-4L / min I-UIP2000hdT
10 kuya ku-100L 2 kuya ku-10L / iminithi UIP4000
na 10 kuya ku-100L / iminithi UIP16000
na sikhulu yinhlanganisela UIP16000

Okuhlangenwe nakho kwethu okude ekusetshenzisweni kwe-ultrasonic kusisiza ukuba sixoxisane namakhasimende ethu kusukela ekufundeni kokuqala okufezekayo ekufezeni ukusebenza kwenqubo yezimboni.

Sebenzisa uhlelo lwethu lwe-ultrasonic lab nekhungo lobuchwepheshe lokuthuthukiswa kwenqubo yakho nokwenza ngcono!

Cela ulwazi oluthe xaxa

Sicela usebenzise ifomu elingezansi, uma ufisa ukucela ulwazi oluthe xaxa mayelana ne-homogenization yama-ultrasonic. Sizojabula ukukunikeza uhlelo lwe-ultrasonic ukuhlangabezana nezidingo zakho.









Sicela uqaphele wethu Inqubomgomo yobumfihlo.


Izincwadi / Izinkomba

  • Peters, S .; Stöckigt, M .; Rössler, Ch. (2009): Impembelelo yamandla-i-Ultrasound ku-Fluidity nokubeka iPortland Cement Pastes; ku-17th Conference Conference International on Materials Building 23rd - 26th September 2009, Weimar.
  • Rössler, Ch. (2009): U-Einfluss von Power-Ultraschall noma uFließ- und Erstarrungsverhalten von Zementsuspensionen; ku: Tagungsband der 17. Internationalen Baustofftagung isakhiwo, Hrsg. Finger-Institut für Baustoffkunde, Bauhaus-Universität Weimar, S. 1 - 0259 - 1 - 0264.
  • Zhongbiao, Man; Chen, Yuehui; I-Yang, Miao (2012): Ukulungiselela nezakhiwo ze-calcium sulphate whisker / izingqimba zenjoloba zemvelo. I-Advanced Materials Research Vol. 549, 2012. 597-600.


Amaqiniso Okufanele Ukwazi

Ukukhiqizwa kweBhodi yeGypsum

Phakathi nenqubo yokukhiqiza yebhodi ye-gypsum, i-aqueous slurry ye-gypsum calcined – okuthiwa i-calcium sulphate hemihydrate – isakazeka phakathi kwamaphepha amaphepha aphezulu naphansi. Ngokwenza kanjalo umkhiqizo kufanele uhanjiswe ngokuqhubekayo ebhanini lokuthutha kuze kufike isilondolozi. Ishidi selumisiwe kuze kube yilapho amanzi okweqile ebhodini le-gypsum ekhuphukile. Ekukhiqizeni i-gypsum wallboard kuyaziwa ukwengeza izinto ezihlukahlukene kwi-slurry ukuthuthukisa inqubo yokukhiqiza noma ibhodi ngokwayo. Isibonelo, kuvamile ukunciphisa isisindo se-slurry ngokufaka ama-agent e-foaming ukuhlinzeka ngezinga le-aeration elinciphisa ubukhulu bodonga lokugcina.

I-Calcium Sulfate

I-calcium sulfate (noma i-calcium sulphate) iyinhlanganisela engavumelani ne-CaSO yefomula4 futhi hydrate ehlobene. Ngendlela e-anhydr ye-γ-anhydrite, isetshenziswa njenge-desiccant jikelele yenhloso. I-hydrate ethile ye-CaSO4 uyaziwa ngokuthi i-plaster yaseParis. Elinye i-hydrate ebalulekile yi-gypsum, eyenzeka ngokwemvelo njengamaminerali. Ikakhulukazi i-gypsum isetshenziselwa kakhulu izicelo zezimboni, isib. Njengezinto zokwakha, ukugcwalisa, kwi-polymers njll. Zonke izinhlobo ze-CSO4 zibonakala njengama-solids ezimhlophe futhi azizincibiliki kalula emanzini. I-calcium sulfate ibangela ubunzima obungapheli emanzini.
I-CSO eyakhiwe engakhiyo4 kwenzeka emazingeni amathathu we-hydration:

  • isimo se-anhydr (igama lomaminerali: “i-anhydrite”) nge-CSSO yefomula4.
  • i-dihydrate (igama lamaminerali: “i-gypsum”) nge-CSSO yefomula4(H2O)2.
  • i-hemihydrate ne-CaSO yefomula4(H22O) 0.5. Ama-hemihydrate acacile angahlukaniswa njenge-alpha-hemihydrate ne-beta-hemihydrate.

Ukusabela kwe-Hydration and Dehydration
Lapho kusetshenzwa ukushisa, i-gypsum iyaguqula ibe ngamaminerali angenawo amanzi – okuthiwa i-calcium sulfate hemihydrate, i-calcined gypsum, noma i-plaster eParis. I-gypsum eqoshiwe ine-CaSO yefomula4· (NH2O), lapho 0.5 ≤ n ≤ 0.8. Ukushisa phakathi kuka-100 ° C no-150 ° C (212 ° F – 302 ° F) kuyadingeka ukususa amanzi aphethwe isakhiwo. Ukushisa okushisayo kanye nesikhathi kuxhomeke emswakama omisiwe. Ukushisa okuphezulu kunama-170 ° C (338 ° F) kusetshenziselwa i-calcination yezimboni. Kodwa-ke, kulawo mazinga okushisa ukwakhiwa kwe-γ-anhydrite kuqala. Amandla okushisa anikezwe ku-gypsum ngalesi sikhathi (ukushisa kwe-hydration) ijwayele ukushayela amanzi (njengamanzi ashisayo) esikhundleni sokwandisa izinga lokushisa kwamaminerali, elikhuphuka kancane kuze kube yilapho amanzi esele, bese ekhuphuka ngokushesha . Ukulingana kokuphela kwamanzi okwesikhashana yilokhu okulandelayo:
I-Crystallization ye-gypsum (Chofoza ukuze ukhulise!)

Impahla yokugcina yale mpendulo iyasebenza ekusebenzeni kwe-drywall, efaka ukumelana nomlilo ezindaweni zokuhlala nezinye izakhiwo. Emlilweni, isakhiwo esingaphansi kweshidi le-drywall lizohlala lipholile njengoba amanzi elahlekile kusukela ku-gypsum, ngaleyo ndlela evimbela futhi ephungula umonakalo wokwakhiwa (ngokushisa kwamalungu ezinkuni noma ukulahlekelwa amandla ensimbi emazingeni aphezulu okushisa) kanye nezakhiwo ezilandelanayo ukuwa. Emazingeni okushisa aphezulu, i-calcium sulfate ikhulula i-oksijeni futhi yenza kanjalo njenge-agent oxidizing. Lesi sici sezinto ezibonakalayo sisetshenziswa ku-aluminothermy. Ngokuphambene namaminerali amaningi, lapho uma kuvuselelwa kabusha ngokumane nje kudala ama-pastes amakhemikhali noma ama-semiliquid, noma ihlale i-powdery, i-calcined gypsum inempahla engavamile. Uma ixubene namanzi endaweni yokushisa ephansi, iphenduka imenyu ephindwe kwifomu ekhethiwe ye-dihydrate, kuyilapho isemzimbeni “ukusetha” zibe emgodini oqinile futhi oqinile we-gypsum crystal njengoba kuboniswe ku-equation ngezansi:
Ukukhipha amanzi emzimbeni we-gypsum okhethekile (Chofoza ukuze ukhulise!)
Lokhu kusabela okwesibindi kwenza kube lula ukuphonsa i-gypsum ngezimo ezihlukahlukene kufaka phakathi amashidi ezomile, okunamathini we-blackboard, kanye nezibunjwa (isb. Ukuvimbela amathambo aphukile, noma ukuthungwa kwensimbi). Ixutshwe nama-polymers, isetshenziswe njengesamente yokulungisa amathambo.
Uma kushisa kufika ku-180 ° C, ifomu elingenamanzi elingenamanzi, okuthiwa i-γ-anhydrite (i-CaSO4· NH2O lapho n = 0 kuya ku-0.05), yenziwa. I-γ-Anhydrite iphendula kancane kancane ngamanzi ukuze ibuyele esimweni se-dihydrate, ukuze isetshenziswe kabanzi njenge-desiccant yezohwebo. Uma kushisa ngaphezu kuka-250 ° C, uhlobo oluphelele ngokuphelele lwe-β-anhydrite lwenzeka. I-β-anhydrite ayiphenduli ngamanzi, ngisho nangaphezu kwama-geological timescales, ngaphandle uma umhlabathi ophansi kakhulu.

I-Plaster

I-plaster iyisakhiwo sokwakha esetshenziswa njengezinto zokuzivikela kanye / noma zokuhlobisa izindonga, ukufakela kanye nokubunjwa nokubunjwa nokwakhiwa kwezakhi zokuhlobisa.
I-Stucco i-plasterwork, esetshenziselwa ukukhiqiza imihlobiso yokukhululeka.
Izinhlobo ezivame kakhulu zokupenda zifakwe ku-gypsum, i-lime, noma isamente njengesithako esiyinhloko. I-plaster ikhiqizwa njenge-powder eyomile (i-gypsum powder). Uma i-powder ixubene namanzi, kunamathela okunamandla kodwa okusebenzayo. Ukusabela okwesibindi ngamanzi kukhulula ukushisa ngenqubo yokukhipha i-crystallization, khona-ke i-plaster hydrated iyanzima.

I-Gypsum Plaster

I-gypsum plaster, noma i-plaster eParis, ikhiqizwa ukwelashwa okushisa (cishe u-300 ° F / 150 ° C) we-gypsum:
I-CaSO4· 2H2O + ukushisa → i-CaSO4· 0.5H2O + 1.5H2O (ekhishwe njengesithambile).
I-Gypsum ingenziwa kabusha ngokuxuba i-powder eyomile ngamanzi. Ukuze uqale ukusethwa kwe-plaster engaqinisekisiwe, i-powder eyomile ixubene namanzi. Ngemuva kwe-approx. Imizuzu engu-10, ukusabela okulungiselelwe kusetha futhi kuphelile ngemuva kwe-approx. Imizuzu engu-45. Noma kunjalo, ukulungiselelwa okuphelele kwe-gypsum kufinyelelwa ngemuva kwe-approx. Amahora angu-72. Uma i-plaster noma i-gypsum ishisa ngaphezu kwe-266 ° F / 130 ° C, i-hemihydrate yenziwa. I-Hemhydrate powder ingabuye iguqulwe ibe yi-gypsum uma ihlakazeka emanzini.