1. Kuumbwa uye Hydration Chemistry yeCalcium Aluminate Cement
1.1 Primary Phase uye Basic Material Resources
(Calcium Aluminate Concrete)
Calcium aluminate kongiri (CAC) chigadzirwa chekuvaka chakasarudzika chakavakirwa pane calcium aluminate simende (CAC), iyo inosiyana zvakanyanya kubva pakati pePortland simende (OPC) mune zvose kuumbwa uye kubudirira.
Chikamu chekutanga chinosunga muCAC ndeye monocalcium aluminate (CaO · Al ₂ O Nhanhatu kana CA), kazhinji inosanganisira 40– 60% we clinker, pamwe nezvimwe zvakasiyana-siyana senge dodecacalcium hepta-aluminate (C ₁₂ A ₇), calcium dialuminate (CA TWO), uye zvishoma zve tetracalcium trialuminate sulfate (C ₄ AS).
Aya matanho anogadzirwa nekubatanidza yakakwirira-kuchena bauxite (aluminium-rich ore) uye sedimentary dombo mumagetsi arc kana rotary kilns patembiricha pakati 1300 °C uye 1600 °C, zvichitungamira kune clinker inogayiwa kuita hupfu huru.
Kushandisa bauxite kunopa huremu hwepamusoro huremu hwealuminium oxide (Zvose zviviri O ₃) web content– kazhinji pakati 35% uye 80%– iyo yakakosha kune chigadzirwa chinoramba uye chemakemikari kuramba zvivakwa zvekugara.
Kusiyana neOPC, iyo inoverengera pa calcium silicate hydrates (C-S-H) kuti uwedzere kusimba, CAC inowana michina yekugara kana yekutengesa zvivakwa ne hydration ye calcium aluminate phases, kugadzira muunganidzwa wakasiyana wemahydrates nehunyanzvi hunoshamisa munzvimbo dzine hutsinye.
1.2 Hydration Chishandiso uye Kusimba Kwesimba
Iyo hydration ye calcium aluminate simenti yakaoma, tembiricha-sensitive process inotungamira mukuumbwa kwe metastable uye yakagadzikana hydrates nenguva.
Patembiricha dzakanyorwa pazasi 20 °C, CA inonyorovesa kukudziridza CAH ₁₀ (calcium aluminate decahydrate) uye C ₂ AH ₈ (dicalcium aluminate octahydrate), ayo ari metastable matanho anopa kukurumidza simba rekutanga– kazhinji kubudirira 50 MPa mukati 1 zuva.
Zvakadaro, patembiricha inopfuura 25– 30 °C, aya metastable hydrates anochinja kune thermodynamically yakachengeteka nhanho, C MATANHU AH MATANHU (hydrogarnet), uye amorphous chiedza uremu aluminium hydroxide (AH shanu), nzira inozivikanwa sekutendeuka.
Shanduko iyi inodzikisira huwandu hwakasimba hwezvikamu zvehydrated, kusimudza porosity uye pamwe kukanganisa kongiri kana isina kubatwa nemazvo panguva yese yekurapa nekugadzirisa.
Chiyero uye nhanho yekutendeuka inokanganiswa nemvura-kune-simende ratio, kurapa tembiricha, uye kuvapo kwezvinhu zvakadai se silica fume kana microsilica, iyo inogona kuderedza kurasikirwa kwekuoma nekunatsa pore chimiro uye kushambadzira kwechipiri maitiro.
Pasinei nekutyisidzirwa kwekutendeuka, iyo yekukurumidza stamina kuwana uye kwekutanga dhizaini kugona kunoita CAC yakanakira precast zvinhu uye emergency mamiriro ekugadzirisa basa munzvimbo dzeindasitiri.
( Calcium Aluminate Concrete)
2. Kugara Kwenyama uye Mechanical Pasi peMatambudziko Akanyanya
2.1 High-Temperature Performance uye Refractoriness
Pakati pezvimwe zvinonyanya kutsanangura maficha e calcium aluminate kongiri kugona kwayo kusimuka ichipokana nekupisa kwakanyanya, zvichiita kuti ive sarudzo yakasarudzika yerefractory cellular linings mumaindasitiri heaters, kilns, uye zvinopisa.
Pakupisa, CAC inoita muunganidzwa wekupererwa nemvura uye sintering mhinduro: mahydrates anoputsika pakati 100 °C uye 300 °C, inoteverwa nekugadzirwa kwepakati pekristani matanho akadai seCA ₂ uye melilite (gehlenite) pamusoro 1000 °C.
Pamazinga ekushisa anodarika 1300 °C, iyo gobvu ceramic chimiro mafomu kuburikidza nemvura-chikamu sintering, zvichiita kuti simba riwedzere kupora uye kuchengetedzwa kwevhoriyamu.
Maitiro aya anosiyana zvakanyanya neOPC-yakavakirwa kongiri, iyo inowanzoputika kana kuderera pamusoro 300 ° C nekuda kwekuremerwa kwemutsindo wekushushikana uye kuparara kwezvikamu zveC-S-H.
CAC-based concretes inogona kuchengetedza inoenderera sevhisi tembiricha mazinga kusvika 1400 °C, zvichienderana nemhando yemhando uye mhinduro, uye anowanzo shandiswa musanganiswa neakareruka aggregates senge calcined bauxite, chamotte, kana mullite kuti uvandudze kupisa kwekuvhunduka.
2.2 Kupokana neChemical Assault uye Corrosion
Calcium aluminate kongiri inoratidza kuramba kunoshamisa kune dzakasiyana siyana dzemakemikari anga, kunyanya acidic uye sulfate-rich mamiriro apo OPC yaizokurumidza kuipa.
Iwo hydrated aluminate phases akanyanya kugadzikana munzvimbo dzakaderera-pH, kubvumira CAC kuramba kurova kweasidhi kubva kune zviwanikwa zvakaita sesarufa, hydrochloric, uye organic acids– zvinowanzoitika mumiti yekuchenesa mvura yetsvina, makemikari kubata nzvimbo, uye mabasa emigodhi.
Iyo zvakare inodzivirira zvakanyanya kune sulfate kurohwa, chikonzero chakakosha cheOPC kongiri kuderera muvhu uye nharaunda dzemugungwa, nekuda kwekushaikwa kwecalcium hydroxide (Portlanders) uye ettringite-kugadzira matanho.
Uyezve, CAC inoratidza kunyungudika kwakaderera mumvura ine munyu uye kuramba kupinda kwechloride ion, kuderedza njodzi yekuderera kwerutsigiro munzvimbo dzinotyisa dzemvura.
Izvi zvekugara kana zvekutengesa zvivakwa zvinoita kuti zvive zvakakodzera kune linings mune biogas digesters, matangi ekuchengetedza mapepa uye pulp, uye flue gasi desulfurization zvishandiso uko zvese makemikari uye ekupisa kushushikana uye kushushikana kuripo.
3. Microstructure uye Resilience Attributes
3.1 Pore Framework uye Inodonha MuChimiro
Kusimba kwecalcium aluminate kongiri yakanyatso batana neiyo microstructure, kunyanya iyo pore dimension kutenderera uye kubatana.
Ichangobva kunyoroveswa CAC inoratidza yakatsetseka pore chimiro chakasiyana neOPC, ine gel pores uye capillary pores inobatsira mukuderedza kupenya uye kuwedzera kuramba kune hutsinye ion ingress..
Zvakadaro, sezvo kutendeuka kunoenderera mberi, iko kuomarara kwe pore framework nekuda kwe densification ye C SIX AH nhanhatu inogona kuwedzera kuvuza muchimiro kana kongiri isina kubatwa zvakanaka kana kuchengetedzwa..
Kukwidziridzwa kwezvinhu zvinopindura aluminosilicate, zvakadai sedota renhunzi kana metakaolin, inogona kusimudzira kusimba kwenguva refu nekushandisa complimentary lime uye kugadzira yekubatsira calcium aluminosilicate hydrate. (C-A-S-H) nhanho dzinonatsa iyo microstructure.
Kurapa chaiko– kunyanya kunyorova kupora patembiricha inodzorwa– zvakakosha kunonoka kutendeuka uye kubvumira kufambira mberi kwedense, matrix isingapindiki.
3.2 Thermal Shock uye Spalling Resistance
Thermal shock resistance ndiyo yakakosha manhamba ehuwandu hwezvinhu zvinoshandiswa mukudziya kwemba yekudziya uye kutonhora kwemhepo..
Calcium aluminate kongiri, kunyanya kana akagadzirwa neakaderera-simende zvinhu uye yakakwirira refractory accumulation quantity, inoratidza kupokana kwakanyanya kune kupisa kwekupisa nekuda kweiyo yakaderera coefficient yekukura kwekupisa uye yakakwira yekupisa conductivity nezve mamwe akasiyana-siyana anopikisa kongiri..
Kuvapo kwema microcracks uye yakabatana porosity inobvumira kushushikana uye kuzorora kwekushushikana mukati mekukurumidza tembiricha yekugadziriswa., kudzivirira njodzi mutswe.
Fiber rutsigiro– making use of steel, polypropylene, or lava fibers– additional improves strength and crack resistance, especially throughout the preliminary heat-up stage of commercial cellular linings.
These features make certain long life span in applications such as ladle cellular linings in steelmaking, rotary kilns in concrete manufacturing, and petrochemical crackers.
4. Industrial Applications and Future Advancement Trends
4.1 Trick Industries and Structural Utilizes
Calcium aluminate concrete is crucial in markets where traditional concrete falls short as a result of thermal or chemical direct exposure.
In the steel and foundry markets, it is utilized for monolithic linings in ladles, tundishes, and saturating pits, where it holds up against liquified steel call and thermal biking.
In waste incineration plants, CAC-yakavakirwa refractory castables inochengetedza yepakati yekudziya bhailer madziro kubva kune acidic flue magasi uye madota enhunzi ane hutsinye pane tembiricha yakakwira.
Nzvimbo yemvura yetsvina yenharaunda inoshandisa CAC kumakomba, pombi zviteshi, uye pombi dzesuweji dzakafumurwa kune biogenic sulfuric acid, kuwedzera hupenyu hurefu hwakasiyana neOPC.
Inoshandiswawo mukukurumidza kugadzirisa masisitimu emigwagwa mikuru, mabhiriji, uye nzira dze airport, uko kukurumidza-kumisikidza kwayo kunobvumira kuvhurwa kwezuva rimwe chete kune webhu traffic.
4.2 Sustainability uye Advanced Formulations
Pasinei nekuita kwayo kwakanakira, kugadzirwa kwecalcium aluminate kongiri kune simba rakawanda uye kune yakakwira kabhoni tsoka kupfuura OPC nekuda kwekukwira-tembiricha..
Tsvagiridzo inoenderera mberi inotarisana nekudzikisa pesvedzero yezvakatipoteredza kuburikidza nechikamu chinotsiva nekutengesa spin-offs, senge lightweight aluminium marara kana slag, uye kuwedzera mashandiro echoto.
Mhinduro nyowani dzinosanganisira nanomaterials, zvakadai se nano-alumina kana kabhoni nanotubes, chinangwa chekuwedzera simba rekutanga, kuderedza kushanduka-kwakabatana kuora, uye kuwedzera mhinduro tembiricha zvirambidzo.
Pamusoro pe, kuvandudzwa kwepasi-simende uye ultra-low-cement refractory castables (ULCCs) inovandudza ukobvu, stamina, uye hupenyu hurefu nekudzikisa huwandu hweiyo reactive matrix paunenge uchishandisa zvakanyanya yakaunganidzwa interlock..
Sezvo nzira dzekutengesa dzichida nguva dzose zvisati zvaitika zvigadzirwa zvinogara kwenguva refu, calcium aluminate concrete inoramba ichifambira mberi sehwaro hwepamusoro-kushanda, chivakwa chakasimba mune imwe yeakanyanya kuoma marongero.
Mukudzokorora, calcium aluminate kongiri inosanganisa kukurumidza stamina kukura, kugadzikana kwepamusoro-tembiricha, uye yakatanhamara makemikari kuramba, zvichiita kuti ive chinhu chakakosha chechimiro chinoenderana nekupisa kwakanyanya uye corrosive mamiriro.
Yayo yakakosha hydration chemistry uye microstructural kufambira mberi inoda kunyatsobata uye chimiro, zvisinei kana ikashandiswa zvakakodzera, inopa kusimba kusingaenzaniswi uye chengetedzo mumashandisirwo ekutengeserana pasi rese.
5. Distributor
Cabr-Concrete mutengesi ari pasi peTRUNANO yeCalcium Aluminate Cement ine pamusoro. 12 makore echiitiko mu nano-kuvaka simba kuchengetedza uye nanotechnology kusimudzira. Inobvuma kubhadhara kuburikidza neCredit Card, T/T, West Union uye Paypal. TRUNNANO ichaendesa zvinhu kune vatengi mhiri kwemakungwa kuburikidza neFedEx, DHL, nemhepo, kana nomugungwa. Kana uri kutsvaga aluminate simende, ndapota inzwa wakasununguka kutibata nesu uye kutumira kubvunza. (
Tags: calcium aluminate,calcium aluminate,aluminate simende
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