● Juriya na ruwa

Rockwool da wuya ya kasance 2Cao da SiO2, don haka kaddarorin juriya sun fi ulun ma'adinai girma.Akwai babban bambanci tsakanin dutsen ulu da ulun ma'adinai don ƙimar PH, ulun dutsen gabaɗaya bai wuce 4 ba, musamman barga fiber ma'adinai mai jure ruwa;Ma'adinan ma'adinai gabaɗaya ya fi 5, ko ma fiye da 6, juriyar ruwansa ba ta da ƙarfi kawai ko ba ta da ƙarfi.Saboda wannan bambance-bambancen da ke tsakanin su, bai kamata a yi amfani da ulun ma'adinai a cikin yanayin rigar ba, musamman a cikin aikin rufewar sanyi.A cikin aikin rufewar sanyi, yanayin zafin zafi yana fitowa daga kwararar waje zuwa ciki, kuma injin insulation zafi kwarara yana cikin kishiyar shugabanci.Danshi na waje zai shiga cikin kayan sanyi mai sanyi a ciki tare da rage yawan zafin jiki, raɓa za ta shiga cikin ruwa, idan amfani da ulu mai ma'adinai a cikin wannan yanayin, za a lalata fiber a hankali a hankali, yana rage rayuwar yanayin sanyi mai sanyi. basu da wannan karancin.Don haka don tsarin ginin gine-gine na iya amfani da ulun dutse kawai azaman abin rufewa.

● Babban juriya na zafin jiki

Lokacin da ma'adinan ulun aiki ya kai 675 ℃, saboda sauye-sauyen jiki, yawansa ya zama karami yayin da girmansa ya yi girma, bayan haka ulun ma'adinan ya fara raguwa da tarwatsewa.Don haka zafin jiki na ma'adinai bai kamata ya wuce 675 ℃ ba.Saboda haka, ba za a iya amfani da ulu mai ma'adinai a cikin gine-gine da gine-gine ba.

Duk da yake dutsen ulu ba ya wanzu wannan matsala, da aiki zafin jiki na iya zama har zuwa 800 ℃, ko da yake babban abun da ke ciki CS-C2-AS-CAS2 eutectic batu ne 1265 ℃, ta softening zafin jiki kuma za a iya isa zuwa 900 ℃ -1000 ℃.

● Juriya na lalata

Babban aikin tanda mai fashewa da narkar da baƙin ƙarfe shine cire mafi yawan sulfur don hana zafi da ke haifarwa a cikin yanayin rashin ƙarfi.Cire sulfur zai kasance a cikin tanderu azaman calcium sulfide (CaS).A cikin samar da ulun ma'adinai, wannan ɓangaren CaS zai biyo baya cikin ulun ma'adinai, wanda abun ciki shine kusan 5%.

Danyewar ulun dutse gabaɗaya basalt ne ko diabase, sai dai akwai ɗan ƙaramin sulfur da coke ke kawowa yayin da ake narkewa, babu sauran tushen sulfur, don haka ba shi da lahani ga ƙarfe.