E ono ngā momo pereki whakamahana māmā mō ngā oumu karāhe e ai ki ō rātou rauemi mata. Ko ngā mea e whakamahia whānuitia ana ko ngā pereki silica māmā me ngā pereki diatomite. He pai te whakamahana wera o ngā pereki whakamahana māmā, engari he ngoikore te ātete ki te pēhanga, te ātete ki te paru, me te ru wera, nō reira kāore e taea te pā tika ki te karāhe rewa, ki te mura rānei.
1. Pereki silica māmā. Ko te pereki whakamarumaru silica māmā he hua ātete ārai i hangaia mai i te silica hei rauemi mata matua, me te ihirangi SiO2 kāore i raro i te 91%. Ko te mātotoru o te pereki whakamarumaru silica māmā he 0.9~1.1g/cm3, ā, ko tōna kawe wera he haurua noa iho i te pereki silica noa. He pai te ātete ki ngā ru wera, ā, ko tōna pāmahana whakangawari i raro i te kawenga ka eke ki te 1600 ℃, he nui ake i te pereki whakamarumaru uku. Nō reira, ko te pāmahana mahi mōrahi o ngā pereki whakamarumaru silica ka eke ki te 1550 ℃. Kāore e mimiti i ngā pāmahana teitei, ā, he iti noa te whānui. Ko te tikanga ka hangaia ngā pereki silica māmā me te Quartzite tioata hei rauemi mata, ā, ka tāpirihia ngā matū mura pēnei i te coke, te anthracite, te wahie rakau, me ētahi atu ki ngā rauemi mata hei hanga hanganga porous, ā, ka taea hoki te whakamahi i te tikanga pahuka hau hei hanga hanganga porous.
2. Pereki Diatomite: Ki te whakaritea ki ētahi atu pereki whakamahana māmā, he iti ake te kawe wera o ngā pereki diatomite. Ka rerekē te pāmahana mahi i runga i te parakore. Ko te pāmahana mahi i raro iho i te 1100 ℃ nā te mea he nui te mimiti o te hua i ngā pāmahana teitei. Me tahu ngā rauemi mata o te pereki diatomite i te pāmahana teitei ake, ā, ka taea te huri i te hauhā silicon hei kuata. Ka taea hoki te tāpiri i te raima hei here me te whakapūmau i te kohuke hei whakatairanga i te hurihanga o te kuata i te wā e tahu ana, he mea pai mō te whakapai ake i te ātete wera o te hua me te whakaiti i te mimiti i ngā pāmahana teitei.
I te putanga e whai ake nei ka haere tonu tā mātou whakauru i te whakarōpūtanga opereki whakamahana māmāmō ngā oumu karāhe. Kia mataara tonu mai!
Te wā tuku: Hōngongoi-10-2023
