Kafin kayyade adadin gypsum retarder, ya zama dole don gwada raw gypsum foda da aka saya. Misali, gwada lokacin saitin farko da na ƙarshe na gypsum foda, daidaitaccen amfani da ruwa (wato, daidaitaccen daidaito), da ƙarfin matsi. Idan za ta yiwu, yana da kyau a gwada abun ciki na ruwa na II, ruwa mai ruwa da gypsum anhydrous a cikin gypsum foda. Da farko auna ma'auni na gypsum foda daidai, sa'an nan kuma ƙayyade adadin gypsum retarder bisa ga tsawon lokacin saitin farko na gypsum foda, rabon gypsum foda a cikin gypsum turmi da ake bukata da kuma lokacin aiki da ake bukata don gypsum turmi .
Adadin gypsum retarder yana da yawa tare da gypsum foda: idan lokacin saitin farko na gypsum foda ya kasance takaice, adadin adadin ya kamata ya fi girma; idan lokacin saitin farko na gypsum foda yana da tsawo, adadin retarder ya kamata ya zama ƙasa. Idan rabon gypsum foda a cikin turmi gypsum yana da girma, ya kamata a kara yawan retarder, kuma idan rabon gypsum foda yana da ƙananan, rabon gypsum foda ya kamata ya zama ƙasa. Idan lokacin aiki da ake buƙata don turmi gypsum ya daɗe, ya kamata a ƙara ƙarin retarder, in ba haka ba, idan lokacin aiki da ake buƙata don turmi gypsum ya kasance gajere, ya kamata a ƙara ƙasa da ƙasa. Idan lokacin aiki ya yi tsayi da yawa bayan an ƙara turmi gypsum tare da retarder, ya zama dole don rage adadin gypsum retarder. Idan lokacin aiki gajere ne, ya kamata a ƙara adadin mai ɗaukar nauyi. Ba a ce ƙari na gypsum retarder yana tsaye ba.
Bayan gypsum ya shiga masana'anta, dole ne a dauki samfurori da yawa don gwada alamunta daban-daban. Zai fi dacewa don samfurin da gwada kowane 'yan kwanaki, saboda tare da lokacin ajiya na gypsum foda, ma'auni daban-daban suna canzawa. Abu mafi mahimmanci shi ne cewa bayan gypsum foda ya tsufa don lokacin da ya dace, lokacin farko da na ƙarshe kuma za a tsawaita. A wannan lokacin, adadin gypsum retarder shima zai ragu, in ba haka ba lokacin aiki na turmi gypsum zai ƙara haɓaka sosai kuma yana ƙaruwa. Yana rage farashin samarwa yayin da yake shafar iya aiki da ƙarfin ƙarshe.
Misali, idan ka sayi batch na phosphogypsum, lokacin saitin farko shine mintuna 5-6, kuma samar da turmi mai nauyi na gypsum shine kamar haka:
Gypsum foda - 300 kg
Yashi da aka wanke - 650 kg
Tumatir - 50 kg
Gypsum retarder - 0.8 kg
HPMC - 1.5 kg
A farkon samarwa, an ƙara 0.8 kg na gypsum retarder, kuma lokacin aiki na turmi gypsum ya kasance minti 60-70. Daga baya, saboda dalilai a wurin ginin, an rufe wurin da aka yi aikin kuma an daina samar da shi, kuma an adana wannan nau'i na gypsum foda don amfani. Lokacin da aka sake fara aikin a watan Satumba, an ƙara ƙarin 0.8 kg na retarder lokacin da aka sake samar da turmi na gypsum. Ba a gwada turmi a masana'antar ba, kuma har yanzu bai inganta ba sa'o'i 24 bayan an tura shi wurin aikin. Wurin ginin ya mayar da martani mai ƙarfi. Tun da masana'anta ya shiga wannan masana'antar ba da dadewa ba, ya kasa gano dalilin, kuma ya damu sosai. A wannan lokacin, an gayyace ni in je wurin masana'antar gypsum turmi don gano dalilin. Bayan zuwa mataki na farko, an gwada lokacin saitin farko na gypsum foda, kuma an gano cewa an ƙaddamar da lokacin saitin farko na gypsum foda daga ainihin lokacin saitin farko na minti 5-6 zuwa fiye da minti 20. kuma ba a rage adadin gypsum retarder ba. , don haka abin da ke sama ya faru. Bayan daidaitawa, an rage adadin gypsum retarder zuwa 0.2 kg, kuma lokacin aiki na turmi gypsum ya ragu zuwa minti 60-70, wanda ya gamsu da wurin ginin.
Bugu da kari, da rabo daga daban-daban Additives a cikin gypsum turmi dole ne m. Misali, lokacin aiki na turmi gypsum yana da mintuna 70, kuma ana ƙara daidai adadin gypsum retarder. Daidai ne, idan an ƙara ƙaramin gypsum turmi, yawan ajiyar ruwa yana da ƙasa, kuma lokacin ajiyar ruwa bai wuce minti 70 ba, wanda ya sa saman turmin gypsum ya rasa ruwa da sauri, saman ya bushe, kuma raguwar ruwa. turmi gypsum bai dace ba. A wannan lokacin, turmi gypsum zai rasa ruwa. fasa.
Ana ba da shawarar ƙirar gypsum plaster guda biyu a ƙasa:
1. gypsum plaster turmi mai nauyi
Gypsum foda (lokacin saitin farko 5-6 mintuna) - 300 kg
Yashi da aka wanke - 650 kg
Tumatir - 50 kg
Gypsum retarder - 0.8 kg
Cellulose ether HPMC(80,000-100,000 cps) - 1.5kg
Thixotropic man shafawa - 0.5 kg
Lokacin aiki shine mintuna 60-70, yawan riƙe ruwa shine 96%, kuma ƙimar riƙe ruwa na ƙasa shine 75%
2 . gypsum plaster turmi mai nauyi
Gypsum foda (lokacin farawa na farko 5-6 mintuna) - 850 kg
Yashi da aka wanke - 100 kg
Tumatir - 50 kg
Gypsum retarder - 1.5 kg
Cellulose ether HPMC (40,000-60,000) -2.5 kg
Thixotropic man shafawa - 1 kg
Vitrified beads - 1 cubic
Lokacin aikawa: Dec-08-2022