Desulfurization gypsum ne na masana'antu ta-samfurin gypsum samu ta hanyar desulfurizing da tsarkakewa hayaki gas samar bayan konewa na sulfur-dauke da man fetur ta lafiya lemun tsami ko farar fata foda slurry. Abubuwan sinadaransa iri ɗaya ne da na gypsum dihydrate na halitta, galibi CaSO4 · 2H2O. A halin yanzu, tsarin samar da wutar lantarki na kasata har yanzu yana da karfin samar da wutar lantarki, kuma SO2 da ake fitarwa da gawayi a tsarin samar da wutar lantarki ya kai sama da kashi 50% na hayakin da kasar ta ke fitarwa a duk shekara. Yawan fitar da iskar sulfur dioxide ya haifar da mummunar gurbatar muhalli. Yin amfani da fasaha mai lalata bututun iskar gas don samar da gypsum da aka lalatar shine muhimmin ma'auni don magance ci gaban fasaha na masana'antu masu alaƙa da wuta. Dangane da kididdigar da ba ta cika ba, watsi da gypsum jika a cikin ƙasata ya zarce miliyan 90 t / a, kuma hanyar sarrafa gypsum ɗin desulfurized galibi tari ne, wanda ba wai kawai ya mamaye ƙasa ba, amma har ma yana haifar da asarar albarkatu.
Gypsum yana da ayyuka na nauyi mai sauƙi, rage amo, rigakafin wuta, zafin jiki, da dai sauransu Ana iya amfani da shi a cikin samar da siminti, gina gine-ginen gypsum, aikin injiniya na ado da sauran fannoni. A halin yanzu, masana da yawa sun gudanar da bincike akan plaster. Binciken ya nuna cewa kayan aikin filasta yana da ƙananan haɓakawa, aiki mai kyau da kuma filastik, kuma yana iya maye gurbin kayan ado na gargajiya don kayan ado na cikin gida. Binciken da Xu Jianjun da sauransu suka yi ya nuna cewa ana iya amfani da gypsum da aka lalatar da su don kera kayan bango marasa nauyi. Binciken da Ye Beihong da sauransu suka yi ya nuna cewa gypsum ɗin da gypsum ɗin da aka yi amfani da shi za a iya amfani da shi don plastering Layer na gefen ciki na bangon waje, bangon bangare na ciki da rufi, kuma yana iya magance matsalolin ingancin gama gari kamar harsashi da fashewar. turmi plaster na gargajiya. Gilashin gypsum mai nauyi wani sabon nau'in kayan shafan muhalli ne. An yi shi da gypsum hemihydrate a matsayin babban kayan siminti ta hanyar ƙara ƙararraki masu nauyi da ƙari. Idan aka kwatanta da kayan aikin siminti na gargajiya, ba shi da sauƙi a fashe, sanda Mai ɗaure mai kyau, ƙanƙantar da kyau, kore da kare muhalli. Yin amfani da desulfurized gypsum don samar da hemihydrate gypsum ba wai kawai yana magance matsalar rashin albarkatun gypsum na gine-gine ba, har ma ya gane amfani da albarkatun gypsum da aka lalata kuma ya cimma manufar kare yanayin muhalli. Saboda haka, dangane da nazarin gypsum desulfurized, wannan takarda yana gwada lokacin saitin, ƙarfin flexural da ƙarfin matsa lamba, don nazarin abubuwan da suka shafi aikin gyare-gyaren gyare-gyare na gypsum gypsum, da kuma samar da tushen ka'idar don haɓaka haske- nauyi plaster desulfurization gypsum turmi.
1 gwaji
1.1 Kayan danye
Desulfurization gypsum foda: Hemihydrate gypsum samar da calcined da flue gas desulfurization fasaha, da asali kaddarorin da aka nuna a cikin Table 1. Light nauyi tara: Vitrified microbeads ana nuna su a cikin Table 2. Vitrified microbeads suna gauraye a cikin rabbai na 4. %, 8%, 12%, da 16% dangane da yawan rabon haske turmi gypsum desulfurized.
Retarder: Yi amfani da sodium citrate, sunadarai bincike mai tsabta reagent, sodium citrate dogara ne a kan nauyi rabo na haske plaster desulfurization gypsum turmi, da hadawa rabo ne 0, 0.1%, 0.2%, 0.3%.
Cellulose ether: amfani da hydroxypropyl methylcellulose (HPMC), danko ne 400, HPMC dogara ne a kan nauyi rabo na haske plastered desulfurized turmi gypsum, da hadawa rabo ne 0, 0.1%, 0.2%, 0.4%.
1.2 Hanyar gwaji
Amfani da ruwa da lokacin saita daidaitattun daidaito na gypsum desulfurized koma zuwa GB/T17669.4-1999 "Ƙaddamar da Kaddarorin Jiki na Gina Gypsum Plaster", da kuma lokacin saita hasken plastering desulfurized gypsum turmi yana nufin GB/T 28627- 2012 "Plastering Gypsum" da aka gudanar.
Ƙarfin flexural da matsawa na gypsum desulfurized ana aiwatar da su bisa ga GB/T9776-2008 "Gypsum Gina", da kuma samfurori tare da girman 40mm × 40mm × 160mm an tsara su, kuma ana auna ƙarfin 2h da ƙarfin bushe bi da bi. Ƙarfin sassauƙa da matsawa na turmi gypsum plastered mai nauyi mai nauyi ana aiwatar da shi bisa ga GB/T 28627-2012 “Plastering Gypsum”, kuma ana auna ƙarfin maganin halitta don 1d da 28d bi da bi.
2 Sakamako da tattaunawa
2.1 Tasirin abun ciki na gypsum foda akan kaddarorin injiniyoyi na gypsum plastering desulfurization mara nauyi.
Jimlar adadin gypsum foda, farar ƙasa foda da ƙananan nauyi shine 100%, kuma adadin ƙayyadaddun ƙayyadaddun ƙarancin haske da ƙari ya kasance ba canzawa. Lokacin da adadin gypsum foda shine 60%, 70%, 80%, da 90%, desulfurization Sakamakon flexural da matsa lamba na turmi gypsum.
Ƙarfin sassauƙa da ƙarfin matsi na haske plastered desulfurized gypsum turmi duka suna ƙaruwa da shekaru, yana nuna cewa matakin hydration na gypsum ya zama mafi wadatar da shekaru. Tare da haɓakar gypsum foda da aka lalatar da su, ƙarfin sassauƙa da ƙarfi na gypsum plastering mai nauyi ya nuna yanayin sama gaba ɗaya, amma haɓaka ya kasance kaɗan, kuma ƙarfin matsawa a cikin kwanaki 28 ya bayyana musamman. A cikin shekarun 1d, ƙarfin gyare-gyare na gypsum foda da aka haɗe tare da 90% ya karu da 10.3% idan aka kwatanta da na 60% gypsum foda, kuma ƙarfin da ya dace ya karu da 10.1%. A cikin shekaru 28 kwanakin, ƙarfin gyare-gyare na gypsum foda da aka haɗe tare da 90% ya karu da 8.8% idan aka kwatanta da na gypsum foda da aka haɗe da 60%, kuma ƙarfin da ya dace ya karu da 2.6%. Don taƙaitawa, ana iya ƙaddamar da cewa adadin gypsum foda yana da tasiri a kan ƙarfin juzu'i fiye da ƙarfin matsawa.
2.2 Tasirin jimlar abun ciki mai nauyi a kan kayan aikin injiniya na gypsum mai ƙarancin nauyi plastered desulfurized
Jimlar adadin gypsum foda, farar ƙasa foda da ƙananan nauyi shine 100%, kuma adadin ƙayyadaddun gypsum foda da admixture ya kasance ba canzawa. Lokacin da adadin vitrified microbeads shine 4%, 8%, 12%, da 16%, filastar haske Sakamakon flexural da ƙarfin matsawa na turmi gypsum da aka lalata.
A daidai wannan shekarun, ƙarfin sassauƙa da ƙarfin matsawa na haske plastered desulfurized gypsum turmi ya ragu tare da haɓakar abun ciki na vitrified microbeads. Wannan shi ne saboda yawancin ƙananan ƙwayoyin cuta suna da tsari mara kyau a ciki kuma ƙarfin nasu ya ragu, wanda ke rage ƙarfin sassauƙa da matsawa na turmi gypsum plaster mai nauyi. A shekarun 1d, ƙarfin gyare-gyare na 16% gypsum foda ya ragu da 35.3% idan aka kwatanta da na 4% gypsum foda, kuma an rage karfin matsa lamba ta 16.3%. A cikin shekaru 28 kwanakin, ƙarfin sassauci na 16% gypsum foda ya ragu da 24.6% idan aka kwatanta da na 4% gypsum foda, yayin da ƙarfin da ya dace ya rage kawai ta 6.0%. Don taƙaitawa, ana iya ƙarasa da cewa tasirin abubuwan da ke cikin vitrified microbeads akan ƙarfin flexural ya fi girma fiye da ƙarfin matsawa.
2.3 Tasirin abun ciki na retarder akan saita lokacin haske plastered desulfurized gypsum
Jimlar adadin gypsum foda, farar ƙasa foda da ƙananan nauyin nauyi shine 100%, kuma adadin ƙayyadaddun foda na gypsum foda, lu'u-lu'u foda, ƙarancin nauyi da cellulose ether ya kasance ba canzawa. Lokacin da adadin sodium citrate shine 0, 0.1%, 0.2%, 0.3%, saitin lokacin sakamakon haske plastered desulfurized gypsum turmi.
Lokacin saitin farko da lokacin saitin ƙarshe na haske plastered desulfurized gypsum turmi duka biyu suna ƙaruwa tare da haɓaka abun ciki na sodium citrate, amma haɓaka lokacin saiti kaɗan ne. Lokacin da abun ciki na sodium citrate shine 0.3%, lokacin saitin farko yana tsawaita 28min, kuma an tsawaita lokacin saitin ƙarshe da 33min. Tsawaita lokacin saiti na iya zama saboda babban yanki na gypsum da aka lalata, wanda zai iya ɗaukar retarder a kusa da gypsum barbashi, ta haka ne rage yawan rushewar gypsum da hana crystallization na gypsum, sakamakon rashin iyawar gypsum slurry. don samar da ingantaccen tsarin tsari. Tsawaita lokacin saitin gypsum.
2.4 Tasirin abun ciki na ether cellulose akan kaddarorin injiniyoyi na gypsum mai ƙarancin nauyi plastered desulfurized
Jimlar adadin gypsum foda, farar ƙasa foda da tara nauyi shine 100%, kuma adadin ƙayyadaddun foda na gypsum foda, farar ƙasa foda, tara nauyi da retarder ya kasance ba canzawa. Lokacin da adadin hydroxypropyl methylcellulose shine 0, 0.1%, 0.2% da 0.4%, sakamakon flexural da matsawa na haske plastered desulfurized gypsum turmi.
A shekaru 1d, ƙarfin sassauƙa na haske plastered desulfurized gypsum turmi da farko ya karu sannan kuma ya ragu tare da karuwar abun ciki na hydroxypropyl methylcellulose; a 28d shekaru, ƙarfin flexural na haske plastered desulfurized gypsum turmi Tare da karuwa da abun ciki na hydroxypropyl methylcellulose, da flexural ƙarfi nuna wani Trend na farko ragewa, sa'an nan karuwa da kuma ragewa. Lokacin da abun ciki na hydroxypropyl methylcellulose shine 0.2%, ƙarfin flexural ya kai matsakaicin, kuma ya zarce ƙarfin da ya dace lokacin da abun ciki na cellulose ya kasance 0. Ko da kuwa shekarun 1d ko 28d, ƙarfin matsa lamba na gypsum gypsum plastered haske plastered yana raguwa tare da karuwar abun ciki na hydroxypropyl methylcellulose, kuma yanayin raguwa daidai ya fi bayyane a 28d ku. Wannan shi ne saboda cellulose ether yana da tasiri na riƙewar ruwa da kuma kauri, kuma buƙatun ruwa don daidaitattun daidaito zai karu tare da karuwar abun ciki na ether cellulose, wanda ya haifar da karuwa a cikin rabon ruwa-ciminti na tsarin slurry, don haka rage ƙarfin. na samfurin gypsum.
3 Kammalawa
(1) Matsayin hydration na gypsum desulfurized ya zama mafi isa tare da shekaru. Tare da haɓaka abun ciki na gypsum foda da aka lalatar da su, ƙarfin sassauƙa da ƙarfi na gypsum plastering mai nauyi ya nuna haɓakar gabaɗaya, amma haɓaka ya kasance kaɗan.
(2) Tare da haɓakar abun ciki na microbeads vitrified, ƙarfin flexural da ƙarfin matsawa na turmi gypsum plastered mai nauyi mai nauyi yana raguwa daidai da haka, amma tasirin abun ciki na vitrified microbeads akan ƙarfin flexural ya fi girma fiye da ƙarfin matsawa. ƙarfi.
(3) Tare da haɓaka abun ciki na sodium citrate, lokacin saitin farko da lokacin saitin ƙarshe na haske plastered desulfurized turmi gypsum an tsawaita, amma lokacin da abun ciki na sodium citrate ƙananan ne, tasirin saitin lokaci ba a bayyane yake ba.
(4) Tare da karuwar abun ciki na hydroxypropyl methylcellulose, ƙarfin matsawa na haske plastered desulfurized turmi gypsum yana raguwa, amma ƙarfin flexural yana nuna yanayin haɓakawa na farko sannan kuma raguwa a 1d, kuma a 28d Ya nuna yanayin raguwa na farko, sannan karuwa sannan yana raguwa.
Lokacin aikawa: Fabrairu-02-2023