Gypsum yekubvisa sulfurization igypsum yemuindasitiri inowanikwa nekubvisa sulfur uye kuchenesa gasi remvura rinogadzirwa mushure mekupiswa kwemafuta ane sarufa kuburikidza netsvina ye lime kana limestone powder. Kuumbwa kwayo kwemakemikari kwakafanana nekwe gypsum ye dihydrate yechisikigo, kunyanya CaSO4·2H2O. Parizvino, nzira yekugadzira simba renyika yangu ichiri kutungamirwa nekugadzira simba remagetsi rinoshandisa marasha, uye SO2 inoburitswa nemarasha panguva yekugadzira simba rekupisa inodarika 50% yeutsi hwegore negore hwenyika yangu. Huwandu hwakawanda hwekuburitsa sulfur dioxide hwakakonzera kusvibiswa kwakanyanya kwezvakatipoteredza. Kushandiswa kwetekinoroji yekubvisa sulfurization yegesi remvura kugadzira gypsum isina sulfur inzira yakakosha yekugadzirisa kuvandudzwa kwetekinoroji kwemaindasitiri ane chekuita nemagetsi ane marasha. Zvichienderana nehuwandu husina kukwana, kuburitsa gypsum yakanyorova isina sulfur munyika yangu kwapfuura 90 miriyoni t/a, uye nzira yekugadzirisa gypsum isina sulfur yakanyanya kuunganidzwa, iyo isingangogari ivhu chete, asiwo inokonzera kutambisa kukuru kwezviwanikwa.
Gypsum ine mabasa ekuderedza huremu, kuderedza ruzha, kudzivirira moto, kudzivirira kupisa, nezvimwewo. Inogona kushandiswa mukugadzira simende, kugadzira gypsum yekuvaka, mainjiniya ekushongedza nedzimwe nzvimbo. Parizvino, nyanzvi dzakawanda dzakaita tsvakiridzo pamusoro peplaster yekupurasita. Tsvakurudzo iyi inoratidza kuti plaster yekupurasita ine kukura kudiki, kushanda zvakanaka uye plasticity, uye inogona kutsiva plaster yechinyakare yekupurasita yekushongedza madziro emukati. Zvidzidzo zvakaitwa naXu Jianjun nevamwe zvakaratidza kuti gypsum yakabviswa sulfuri inogona kushandiswa kugadzira madziro akareruka. Zvidzidzo zvakaitwa naYe Beihong nevamwe zvakaratidza kuti plaster yekupurasita inogadzirwa ne gypsum yakabviswa sulfuri inogona kushandiswa pa plaster yekupurasita yerutivi rwemukati rwemadziro ekunze, madziro emukati nedenga, uye inogona kugadzirisa matambudziko akajairika akadai sekupwanya nekupwanya mortar yekupurasita yechinyakare. Gypsum yekupurasita yakareruka rudzi rutsva rwe plaster inochengetedza nharaunda. Yakagadzirwa ne hemihydrate gypsum sechinhu chikuru che cementitious nekuwedzera aggregates uye admixtures dzakareruka. Kana ichienzaniswa nezvinhu zve simende zvechinyakare, hazvisi nyore kutsemuka, kunamira Kusunga kwakanaka, kupfupika kwakanaka, girini uye kuchengetedzwa kwezvakatipoteredza. Kushandiswa kwegypsum yakacheneswa kugadzira hemihydrate gypsum hakungogadzirisi dambudziko rekushaikwa kwezviwanikwa zvegypsum zvekuvaka zvakasikwa chete, asiwo kunoita kuti gypsum yakacheneswa ishandiswe zvakanaka uye kuzadzisa chinangwa chekuchengetedza nharaunda. Saka, zvichibva pakudzidza kwegypsum yakacheneswa, bepa iri rinoedza nguva yekuiswa, simba reflexural uye simba rekumanikidza, kudzidza zvinhu zvinokanganisa mashandiro e light-weight plastering desulfurization gypsum mortar, uye kupa hwaro hwedzidziso hwekugadzirwa kwe light-weight plastering desulfurization gypsum mortar.
Kuedza kumwe chete
1.1 Zvinhu zvisina kugadzirwa
Upfu hwegypsum hunobviswa musulfurization: Hemihydrate gypsum inogadzirwa uye inonyungudutswa ne flue gas desulfurization tekinoroji, hunhu hwayo hwekutanga hunoratidzwa muTafura 1. Huremu hwayo hwakareruka: ma microbeads ane vitrified anoshandiswa, uye hunhu hwayo hwekutanga hunoratidzwa muTafura 2. Ma microbeads ane vitrified anosanganiswa muhuwandu hwe4%, 8%, 12%, uye 16% zvichienderana nehuwandu hwehukuru hwe light plastered desulfurized gypsum mortar.
Retarder: Shandisa sodium citrate, kuongorora makemikari kwakachena reagent, sodium citrate yakavakirwa pahuremu hwechiyero che light plastering desulfurization gypsum mortar, uye chiyero chekusanganisa i0, 0.1%, 0.2%, 0.3%.
Cellulose ether: shandisa hydroxypropyl methylcellulose (HPMC), viscosity ndeye 400, HPMC yakavakirwa pahuremu hwe light plastered desulfurized gypsum mortar, uye mixing ratio ndeye 0, 0.1%, 0.2%, 0.4%.
1.2 Nzira yekuyedza
Kushandiswa kwemvura nenguva yekugadzika kwehuwandu hwegypsum yakabviswa sulfuri kunoreva GB/T17669.4-1999 "Kuziva Hunhu Hwekuvaka Gypsum Plaster", uye nguva yekugadzika kwepurasitiki yakapfava yegypsum mortar yakabviswa sulfuri kunoreva GB/T 28627-2012 "Kugadzika Gypsum" kunoitwa.
Simba rekukwenya nekudzvanya regypsum yakabviswa sulfuri rinoitwa zvichienderana neGB/T9776-2008 “Building Gypsum”, uye sampuli dzine saizi ye40mm×40mm×160mm dzinoumbwa, uye simba remaawa maviri nesimba rekuoma zvinoyerwa zvakateerana. Simba rekukwenya nekudzvanya regypsum mortar yakabviswa sulfuri rinoitwa zvichienderana neGB/T 28627-2012 “Plastering Gypsum”, uye simba rekukwenya kwechisikigo re1d ne28d rinoyerwa zvakateerana.
2 Mhedzisiro nehurukuro
2.1 Mhedzisiro yehuwandu hweupfu hwegypsum pahunhu hwekugadzira plastering yakareruka desulfurization gypsum
Huwandu hwese hwe gypsum powder, limestone powder uye lightweight aggregate i100%, uye huwandu hwe fixed light aggregate uye admixture hunoramba husina kuchinja. Kana huwandu hwe gypsum powder huri 60%, 70%, 80%, uye 90%, desulfurization Mhedzisiro yekusimba kwe flexural uye compressive ye gypsum mortar.
Simba rekuchinjika uye simba rekudzvanya re light plastered desulfurized gypsum mortar zvese zvinowedzera nekukura, zvichiratidza kuti hydration ye gypsum inokwana nekukura. Nekuwedzera kwe desulfurized gypsum powder, simba rekuchinjika uye simba rekudzvanya re lightweight plastering gypsum zvakaratidza kuwedzera, asi kuwedzera kwacho kwaive kudiki, uye simba rekudzvanya pamazuva makumi maviri nemasere raive pachena zvakanyanya. Pazera rekutanga, simba rekuchinjika re gypsum powder rakasanganiswa ne90% rakawedzera ne10.3% zvichienzaniswa ne 60% gypsum powder, uye simba rekudzvanya rinoenderana rakawedzera ne10.1%. Pazera remazuva makumi maviri nemasere, simba rekuchinjika re gypsum powder rakasanganiswa ne90% rakawedzera ne8.8% zvichienzaniswa ne gypsum powder yakasanganiswa ne60%, uye simba rekudzvanya rinoenderana rakawedzera ne2.6%. Muchidimbu, zvinogona kugumiswa kuti huwandu hwe gypsum powder hune simba rakawanda pa flexural strength kupfuura simba rekudzvanya.
2.2 Mhedzisiro yehuwandu hwakareruka hwezvinhu zvakasanganiswa pahunhu hwegypsum yakapfava yakaputirwa nepurasitiki
Huwandu hwese hwe gypsum powder, limestone powder uye lightweight aggregate i100%, uye huwandu hwe fixed gypsum powder uye admixture hunoramba husina kuchinja. Kana huwandu hwe vitrified microbeads huri 4%, 8%, 12%, uye 16%, light plaster Mhedzisiro ye flexural uye compressive strength ye desulfurized gypsum mortar.
Pazera rimwe chetero, simba rekuchinjika uye simba rekudzvanya re light plastered desulfurized gypsum mortar zvakaderera nekuwedzera kwehuwandu hwe vitrified microbeads. Izvi zvinodaro nekuti mazhinji ema vitrified microbeads ane chimiro chisina kusimba mukati uye simba rawo rakaderera, izvo zvinoderedza simba rekuchinjika uye rekudzvanya re lightweight plastering gypsum mortar. Pazera rekutanga, simba rekuchinjika re 16% gypsum powder rakaderedzwa ne35.3% zvichienzaniswa ne 4% gypsum powder, uye simba rekudzvanya rinoenderana rakaderedzwa ne16.3%. Pazera remazuva makumi maviri nemasere, simba rekuchinjika re 16% gypsum powder rakaderedzwa ne24.6% zvichienzaniswa ne 4% gypsum powder, nepo simba rekudzvanya rinoenderana rakaderedzwa ne6.0% chete. Muchidimbu, zvinogona kugumiswa kuti mhedzisiro yehuwandu hwe vitrified microbeads pasimba rekuchinjika yakakura kupfuura iyo pasimba rekudzvanya.
2.3 Mhedzisiro yezviri mukati memubati panguva yekuiswa kwechiedza chegypsum chakaiswa desulfurized plastered
Muyero wese weupfu hwegypsum, upfu hwe limestone uye lightweight aggregate ndeye 100%, uye muyero we fixed gypsum powder, limestone powder, lightweight aggregate uye cellulose ether unoramba usina kuchinja. Kana muyero we sodium citrate uri 0, 0.1%, 0.2%, 0.3%, nguva yekugadzika mhedzisiro ye light plastered desulfurized gypsum mortar.
Nguva yekutanga yekugadzika uye nguva yekupedzisira yekugadzika kwe light plastered desulfurized gypsum mortar zvese zvinowedzera nekuwedzera kwe sodium citrate content, asi kuwedzera kwenguva yekugadzika kushoma. Kana sodium citrate content iri 0.3%, nguva yekutanga yekugadzika inowedzera 28min, uye nguva yekupedzisira yekugadzika yakawedzerwa ne33min. Kuwedzerwa kwenguva yekugadzika kunogona kunge kuri nekuda kwenzvimbo yakakura ye desulfurized gypsum, iyo inogona kunwisa retarder yakatenderedza gypsum particles, nokudaro ichideredza mwero wekunyungudika kwe gypsum uye ichidzivisa crystallization ye gypsum, zvichikonzera kutadza kwe gypsum slurry kugadzira system yakasimba yekuvaka. Wedzera nguva yekugadzika ye gypsum.
2.4 Mhedzisiro yehuwandu hwe cellulose ether pahunhu hwemakanika hwe gypsum yakapfava yakaputirwa ne plastered desulfurized
Muyero wese we gypsum powder, limestone powder uye lightweight aggregate ndeye 100%, uye muyero we fixed gypsum powder, limestone powder, lightweight aggregate uye retarder unoramba usina kuchinja. Kana muyero we hydroxypropyl methylcellulose uri 0, 0.1%, 0.2% uye 0.4%, simba re flexural uye compressive rinobuda mu light plastered desulfurized gypsum mortar.
Pazera rekutanga, simba reflexural re light plastered desulfurized gypsum mortar rakatanga rawedzera uye razodzikira nekuwedzera kwe hydroxypropyl methylcellulose; pazera remakore makumi maviri nemasere, simba reflexural re light plastered desulfurized gypsum mortar. Nekuwedzera kwehuwandu hwe hydroxypropyl methylcellulose, simba reflexural rakaratidza kutanga kudzikira, rozowedzera uye rozodzikira. Kana huwandu hwe hydroxypropyl methylcellulose huri 0.2%, simba reflexural rinosvika pakakwirira, uye rinodarika simba rinoenderana kana huwandu hwe cellulose huri 0. Pasinei nezera remakore gumi nerimwe kana makumi maviri nemasere, simba rekumanikidza re light plastered desulfurized gypsum mortar rinodzikira nekuwedzera kwehuwandu hwe hydroxypropyl methylcellulose, uye mafambiro ekuderera anoenderana anoonekwa zvakanyanya pamazuva makumi maviri nemasere. Izvi zvinodaro nekuti cellulose ether ine simba rekuchengetedza mvura nekukora, uye kudiwa kwemvura kuti ive nechimiro chakajairika kuchawedzera nekuwedzera kwehuwandu hwe cellulose ether, zvichikonzera kuwedzera kwehuwandu hwemvura nesimende yechimiro cheslurry, nokudaro zvichideredza simba remuenzaniso we gypsum.
3 Mhedziso
(1) Kunyorova kwemvura kwegypsum yakabviswa sulfur kunowedzera kukwana nekukura. Nekuwedzera kwehuwandu hweupfu hwegypsum yakabviswa sulfur, simba rekukwenya nekudzvanya regypsum yakapfava yakaratidza kuwedzera, asi kuwedzera kwacho kwaive kudiki.
(2) Nekuwedzera kwehuwandu hwema microbeads ane vitrified, simba re flexural uye simba rekumanikidza re light-weight plastered desulfurized gypsum mortar zvinoderera zvinoenderana, asi mhedzisiro yehuwandu hwema microbeads ane vitrified pasimba re flexural yakakura kupfuura iyo yesimba re compressive.
(3) Nekuwedzera kwehuwandu hwe sodium citrate, nguva yekutanga yekugadzika uye nguva yekupedzisira yekugadzika kwe light plastered desulfurized gypsum mortar zvinorebeswa, asi kana huwandu hwe sodium citrate huri hudiki, mhedzisiro yenguva yekugadzika haisi pachena.
(4) Nekuwedzera kwehuwandu hwehydroxypropyl methylcellulose, simba rekumanikidza re light plastered desulfurized gypsum mortar rinoderera, asi simba re flexural rinoratidza maitiro ekutanga achiwedzera uye ozodzikira pa 1d, uye pa 28d Rakaratidza maitiro ekutanga akadzikira, ozowedzera uye ozodzikira.
Nguva yekutumira: Kukadzi-02-2023