3-12 nau'ikan abubuwan kwalliya da aka yi amfani da su a cikin girltory mai rikitarwa, kayan filastik da ramming (3)

(3-12 nau'i na kayan kwalliya da aka yi amfani da shi a cikin girltory mai rikitarwa, kayan filastik da na Ramming (3))

Kaddarorin da nau'ikan abubuwan da suka haɗa da simintin gyare-gyare na refractories, musamman ma'adinan ƙarfe na ƙarfe, kayan raming, robobi da sauran ɓangarorin amorphous sun bambanta. Matsayin abin da ake hadawa da kankare shi ma ya sha bamban saboda banbance-banbance na yawan adadin siminti, nau’in abin da ake amfani da shi, sinadaran da sauransu. A cikin tsarin samar da amorphous refractories, da kankare Additives akasari amfani za a iya raba zuwa wadannan goma sha biyu Categories bisa ga amfani:

9. Defoamer

Defoamer na iya tserewa da sauri daga kumfa da aka samar ta hanyar amorphous refractories yayin hadawa ko gyare-gyaren rawar jiki. Defoamer kuma abu ne mai aiki a saman, kuma ikonsa na rage tashin hankali na ruwa yana da ƙarfi fiye da na wakili mai kumfa. Ƙarfin fim ɗin ruwa da aka kafa yana raguwa sosai, kumfa ya rasa kwanciyar hankali, kuma saurin yadawa a kan ruwa yana da sauri, saurin yadawa yana da sauri, mafi karfi da tasiri na lalata. Nau'o'in defoamers sun haɗa da barasa, fatty acids da fatty acid salts, mahadi na organosilicon da sauransu.

10. Maganin hana kumburin ciki

Wakilin anti-shrinkage zai iya rage ko hana raguwar da ke haifarwa ta hanyar dumama da amfani da refractories bayan kafa, wanda kuma aka sani da girma stabilizer ko wakili mai faɗi. Ka'idodinta na hana raguwa shine:

Rushewar thermal:

The anti-shrinkage wakili za a pyrolyzed bayan high zafin jiki dumama, kuma molar girma na samfurin ya fi girma fiye da na asali abu kafin pyrolysis, don haka rama sintering shrinkage na kayan. Irin su kyanite anti-shrinkage agent.

Maganin sinadaran:

Bayan yawan zafin jiki na sinadarai, ƙarar molar sabon lokaci ya fi girma fiye da na farkon lokacin amsawa, don haka za a iya rama raguwar ɓarna. Idan α-Al2O3 an ƙara zuwa magnesia castables a matsayin anti-shrinkage wakili, za a iya samar da ƙarar fadada tasirin ta samuwar alumina-magnesia spinel ta high zafin jiki dauki. Misali, yumbu mai ɗaure ko foda na silica ana ƙara shi zuwa babban simintin alumina don rama raguwar raguwar ƙarar ƙarar ƙarar mullite da aka samar a babban zafin jiki.

Canjin Crystal:

A kara anti-shrinkage wakili ba zai iya kawai canza crystal nau'i na fadada a cikin aiwatar da high zafin jiki dumama, amma kuma rama shrinkage na sintering. Alal misali, a cikin aluminosilicate castable ko filastik, an ƙara adadin silica foda mai dacewa don rama raguwar raguwar matrix tare da taimakon ƙarar ƙara lokacin da aka canza ma'adini zuwa cristobalite ko cristobalite.

11. Wakilin adanawa

Wakilin adanawa zai iya ci gaba da aikin ginin baya canzawa ko canzawa bayan an adana abubuwan da ke cikin amorphous na wani ɗan lokaci. Alal misali, Al2O3-SiO2 jerin refractory robobi da ramming kayan, wanda yawanci a hade tare da phosphoric acid ko aluminum dihydrogen phosphate, za su amsa da Al2O3 a cikin kayan don samar da insoluble aluminum orthophosphate, wanda ya sa cakuda bushe prematurely kuma rasa ta workability. Sabili da haka, yana da mahimmanci don ƙara abin ɓoye wanda zai iya samar da hadaddun tare da Al3 + ion don hana samuwar aluminum orthophosphate da ba za a iya narkewa ba kuma ya tsawaita rayuwar shiryayye. Abubuwan da ake amfani da su don robobi da kayan ramming hade da phosphoric acid ko aluminum dihydrogen phosphate sune oxalic acid, citric acid, tartaric acid da sauransu. Sulfonic salicylic acid da dextrin suma suna da rawar kiyayewa.

12. Mai hanawa

Masu hanawa na iya hana haɓakar haɓakar haɓakar ƙarfe da ƙarfe na ƙarfe a cikin ɓangarorin amorphous tare da masu haɗin sinadarai na acidic, don haka ana kiran shi wakili mai haɓakawa. Lokacin da aka yi amfani da abubuwan haɗin sinadarai na acidic (irin su phosphoric acid, aluminum dihydrogen phosphate, aluminum sulfate, aluminum chloride da polyaluminum chloride, da dai sauransu) a matsayin masu ɗaure, cakuda gabaɗaya yana buƙatar wucewa ta kayan da aka kama. don sanya mai ɗaurin acid ɗin ya cika cikar baƙin ƙarfe ko ferrous mahadi da ke ƙunshe a cikin cakuda don sakin hydrogen, in ba haka ba zai haifar da haɓakawa kuma ya sa kayan ya zama sako-sako da fashe kuma ƙarfin ya ragu. Idan an yi amfani da shi kai tsaye ba tare da kayan tarko ba, dole ne a ƙara mai hanawa. Inhibitor wani nau'i ne na wakili mai rikitarwa, wanda zai iya amsawa da ƙarfe na ƙarfe don samar da hadaddun, wanda zai iya hana haɓakawa. Wadannan masu hanawa sun hada da CroO3, diacetone barasa, ferric phosphate da sauransu.

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(3-12 nau'i na kayan kwalliya da aka yi amfani da shi a cikin girltory mai rikitarwa, kayan filastik da na Ramming (3))