Lub pob zeb drift bead yog ib hom pob zeb fly ash hollow uas ntab tau saum dej. Nws yog xim grey dawb, nrog cov phab ntsa nyias thiab khoob, thiab hnyav heev. Qhov hnyav ntawm lub pob zeb yog 720kg/m3 (hnyav), 418.8kg/m3 (sib dua), thiab qhov loj ntawm cov khoom me me yog li 0.1 hli. Qhov saum npoo yog kaw thiab du, nrog cov thermal conductivity qis thiab tiv taus hluav taws ntawm ≥ 1610 ℃. Nws yog cov khoom siv refractory zoo heev, siv dav hauv kev tsim cov castables sib dua thiab kev khawb roj. Cov tshuaj lom neeg ntawm lub pob zeb floating feem ntau yog silicon dioxide thiab txhuas oxide. Nws muaj cov yam ntxwv ntawm cov khoom me me, khoob, hnyav sib dua, muaj zog siab, tiv taus hnav, tiv taus kub siab, rwb thaiv tsev thermal, rwb thaiv tsev thiab hluav taws kub tsis kam. Nws yog ib qho ntawm cov khoom siv raw siv dav hauv kev lag luam tiv taus hluav taws.

Lub pob zeb drift bead yog ib hom pob zeb fly ash hollow uas ntab tau saum dej. Nws yog xim grey dawb, nrog cov phab ntsa nyias thiab khoob, thiab hnyav heev. Qhov hnyav ntawm lub pob zeb yog 720kg/m3 (hnyav), 418.8kg/m3 (sib dua), thiab qhov loj ntawm cov khoom me me yog li 0.1 hli. Qhov saum npoo yog kaw thiab du, nrog cov thermal conductivity qis thiab tiv taus hluav taws ntawm ≥ 1610 ℃. Nws yog cov khoom siv refractory zoo heev, siv dav hauv kev tsim cov castables sib dua thiab kev khawb roj. Cov tshuaj lom neeg ntawm lub pob zeb floating feem ntau yog silicon dioxide thiab txhuas oxide. Nws muaj cov yam ntxwv ntawm cov khoom me me, khoob, hnyav sib dua, muaj zog siab, tiv taus hnav, tiv taus kub siab, rwb thaiv tsev thermal, rwb thaiv tsev thiab hluav taws kub tsis kam. Nws yog ib qho ntawm cov khoom siv raw siv dav hauv kev lag luam tiv taus hluav taws.

Kev ua tau zoo heev thiab kev siv cov hlaws dai ntab

Kev tiv thaiv hluav taws kub heev. Cov khoom siv tshuaj lom neeg tseem ceeb ntawm cov hlaws dai ntab yog cov oxides ntawm silicon thiab txhuas, nrog rau silicon dioxide suav txog li 50-65% thiab txhuas trioxide suav txog li 25-35%. Vim tias qhov kub ntawm silicon dioxide yog siab txog 1725 degrees Celsius, thiab qhov kub ntawm txhuas oxide yog 2050 degrees Celsius, ob qho tib si yog cov tshuaj refractory siab. Yog li ntawd, cov hlaws dai ntab muaj kev tiv thaiv hluav taws kub heev, feem ntau ncav cuag 1600-1700 degrees Celsius, ua rau lawv cov khoom siv refractory zoo heev. Lub teeb yuag, rwb thaiv tsev thiab rwb thaiv tsev. Phab ntsa hlaws dai ntab yog nyias thiab khoob, nrog lub tshuab nqus tsev ib nrab hauv qhov thiab tsuas yog me me ntawm cov roj (N2, H2, CO2, thiab lwm yam), ua rau muaj kev coj ua cua sov qeeb heev thiab tsawg kawg nkaus. Yog li ntawd, cov hlaws dai uas ntab tsis yog tsuas yog sib dua xwb (nrog rau qhov hnyav ntawm 250-450 kilograms / m3), tab sis kuj muaj kev rwb thaiv tsev zoo heev thiab kev rwb thaiv tsev thermal (nrog rau kev ua haujlwm thermal ntawm 0.08-0.1 ntawm chav tsev kub), uas tso lub hauv paus rau lawv lub peev xwm zoo hauv thaj chaw ntawm cov ntaub ntawv rwb thaiv tsev sib dua. Kev tawv thiab lub zog siab. Raws li cov hlaws dai uas ntab yog iav tawv tsim los ntawm silicon txhuas Oxide mineral theem (quartz thiab mullite), nws qhov nyuaj tuaj yeem ncav cuag Mohs 6-7, lub zog siab static tuaj yeem ncav cuag 70-140MPa, thiab nws qhov ceev tiag tiag yog 2.10-2.20g / cm3, uas yog sib npaug rau cov pob zeb. Yog li ntawd, cov hlaws dai uas ntab muaj lub zog siab. Feem ntau, cov khoom siv porous lossis hollow xws li Perlite, pob zeb npau, diatomite, pumice, nthuav dav vermiculite, thiab lwm yam yog qhov nyuaj thiab lub zog tsis zoo. Cov khoom rwb thaiv tsev thermal lossis cov khoom siv refractory ua los ntawm lawv muaj qhov tsis zoo ntawm lub zog tsis zoo. Lawv qhov tsis muaj zog yog qhov tseeb lub zog ntawm cov hlaws dai ntab, uas muab rau lawv qhov zoo dua thiab ntau yam kev siv. Qhov loj ntawm cov khoom me me thiab thaj chaw loj. Qhov loj ntawm cov khoom me me ntawm cov hlaws dai ntab yog txij li 1 txog 250 microns. Thaj chaw tshwj xeeb yog 300-360cm2/g, uas zoo ib yam li cov cement. Yog li ntawd, cov hlaws dai ntab tsis tas yuav sib tsoo thiab siv tau ncaj qha. Qhov zoo tuaj yeem ua tau raws li qhov xav tau ntawm ntau yam khoom. Lwm cov ntaub ntawv rwb thaiv tsev cua sov sib dua feem ntau yog cov khoom loj (xws li Perlite). Yog tias lawv raug sib tsoo, lub peev xwm yuav nce ntxiv ntau thiab qhov rwb thaiv tsev cua sov yuav txo qis ntau. Hauv qhov no, cov hlaws dai ntab muaj qhov zoo. Kev rwb thaiv tsev hluav taws xob zoo heev. Cov hlaws dai ntab tom qab xaiv cov hlaws dai sib nqus yog cov khoom rwb thaiv tsev zoo heev uas tsis ua hluav taws xob. Qhov tsis kam ntawm cov insulators dav dav txo qis nrog qhov kub nce, thaum qhov tsis kam ntawm cov hlaws dai ntab nce ntxiv nrog qhov kub nce. Qhov zoo no tsis muaj los ntawm lwm cov ntaub ntawv rwb thaiv tsev. Yog li, nws tuaj yeem siv los tsim cov khoom rwb thaiv tsev hauv qab qhov kub siab.