An acid proof brick (also known as an acid resistant brick) is a dense, vitrified ceramic refractory masonry unit engineered from high-purity silica (SiO2>=70%) and alumina (Al2O3>=20%) raw materials, fired under high temperatures to achieve exceptional chemical inertness and low water absorption (<=1.5%). Kev tswj hwm thoob ntiaj teb los ntawm ASTM C279 thiab DIN 28062, cov kua qaub pov thawj cib xa cov kua qaub solubility tsis kam tshaj 99.8% tiv thaiv cov ntsiab lus tsis muaj zog (xws li sulfuric, hydrochloric, nitric, thiab phosphoric acids, tsis suav nrog hydrofluoric acid). Nrog rau qhov ntom ntom feem ntau ntawm 2.20 thiab 2.40 g / cm³ thiab txias crushing lub zog siab tshaj 60 MPa, cov cib tshwj xeeb no tiv thaiv cov pob zeb thiab carbon steel plhaub tiv thaiv cov tshuaj corrosion, thermal cycling, thiab txhua yam yaig nyob rau hauv flue gas desulfurization (FGD) chimneys, sulfuric picks tank, thiab tshuaj lom neeg.
Kev qhia txog qhov tseeb ASTM C279 chav kawm thiab sib koom ua ke mortar yog qhov tseem ceeb uas txiav txim siab seb puas muaj cov ntaub pua tsev ua haujlwm ntev li 15 xyoo lossis ua tsis tiav los ntawm acid permeation hauv 18 lub hlis.
Technical Specifications: ASTM C279 Cov Qauv & Cov Qauv
ASTM C279 standardizes chemical-resistant masonry rau hauv peb hom sib txawv raws li sulfuric acid kuj, txias crushing zog, thiab dej nqus:
1. ASTM C279 Hom I (High Chemical Resistance, Tsawg Absorption)
Hom dej nqus dej (Boiling 2h): Tsawg dua lossis sib npaug li 1.5%
Cold Crushing Strength (CCS): Ntau dua lossis sib npaug rau 70 MPa (10,150 psi)
Modulus ntawm Rupture (MOR): Ntau dua lossis sib npaug li 15 MPa
Sulfuric Acid Solubility Loss (ASTM C279 Test): Tsawg dua lossis sib npaug li 8.0% (Lub Hoobkas qhov nruab nrab: 2.1% rau 3.8%)
Qhov siab tshaj plaws kev pab kub: 450℃rau 500 degree
Daim Ntawv Thov Tseem Ceeb: Cov kua qaub cia tso tsheb hlau luam, cov tshuaj tiv thaiv cov hlab ntsha, cov txheej txheem tshuaj lom neeg hauv tsev, thiab cov kab mob autoclave uas yuav tsum muaj cov kua dej ntau tshaj plaws.
2. ASTM C279 Hom II (Thermal Shock & Acid Resistance)
Kev nqus dej zoo: 2.0% txog 4.0%
Cold Crushing Strength (CCS): Ntau dua lossis sib npaug rau 55 MPa (7,980 psi)
Modulus ntawm Rupture (MOR): Ntau dua lossis sib npaug li 12 MPa
Acid Solubility Poob: Tsawg dua lossis sib npaug li 10.0%
Qhov siab tshaj plaws kev pab kub: 600℃txog 800 degree
Daim ntawv thov tseem ceeb: ntub dej FGD flue gas ducts, fais fab nroj tsuag chimney stack liners, thiab thermal incinerator tso ducts ntsib cov thermal fluctuation.
3. ASTM C279 Hom III (Thermal Shock Resistant)
Kev nqus dej zoo: 4.0% txog 6.0%
Cold Crushing Strength (CCS): Ntau dua lossis sib npaug li 40 MPa (5,800 psi)
Modulus ntawm Rupture (MOR): Ntau dua lossis sib npaug li 9 MPa
Daim Ntawv Thov Tseem Ceeb: Kev caij tsheb kauj vab nrawm nrawm nrawm qhov chaw kub ceev tshwm sim nrog rau cov corrosive sulfur dioxide gases.
Rau qhov kub siab tshaj plaws kev lag luam ib puag ncig siab tshaj 1000℃qhov twg cov neeg kho tshuab puas loj heev coexists nrog cov tshuaj tua hluav taws, cov kws ua haujlwm hloov mus rausilicon carbide ciblos yog ntom alumina refractories.
Chemical Resistance Mechanisms: Vim Li Cas Acid Proof Brick Outperforms Standard Fireclay
Standard fireclay cib muaj cov tsis muaj hlau oxide, dawb calcium, thiab porosity siab (18% mus rau 24%). Thaum raug kub sulfuric los yog hydrochloric acid, acid molecules nkag mus rau hauv lub ntxeem tau matrix, dissolving hlau tebchaw thiab calcium aluminate binders, ua rau kom sai disintegration.
Acid pov thawj bricks tshem tawm qhov tsis zoo no los ntawm kev tswj cov mineralogy:
Vitrified Quartz-Mullite Skeleton:Thaum lub sij hawm tua ntawm 1250℃mus rau 1320 degree, qib high-qib quartz thiab feldspar fuse rau hauv ib tug ntom microcrystalline quartz-mullite network embedded nyob rau hauv ib tug impermeable silicate iav matrix. Qhov no kaw-pore qauv thaiv cov kua qaub nkag mus rau sab hauv ntawm lub cib.
Zero Active Hlau Cov ntsiab lus:Hlau oxide (Fe2O3) yog nruj me ntsis txwv kom qis dua 1.2%. Vim hais tias hlau reacts aggressively nrog sulfuric acid los tsim cov hlau sulfates uas o thiab tawg masonry, uas tsis muaj hlau cov ntsiab lus guarantees tshuaj stability thoob plaws pH 0 txog 6.
Impermeability rau Wet Acid Vapors:Nrog dej nqus qis dua 1.5%, capillary suction yog tshem tawm zoo. Qhov no tiv thaiv acid vapor tsiv teb tsaws tom qab lub cib hauv ob sab phlu mus rau cov pob zeb ua vaj tse lossis steel plhaub.
Honest Engineering Limitation:Acid pov thawj cib yog qhov tsis zoo rau tag nrho cov organic thiab ntxhia acids, nrog rau ob qho kev zam tseem ceeb: hydrofluoric acid (HF), uas dissolves silica, thiab boiling concentrated alkaline daws (pH> 12), uas etch silicate iav. Rau alkaline ib puag ncig, cov txheej txheem magnesia bricks yuav tsum tau siv los hloov.
Flue Gas Desulfurization (FGD) thiab Chimney Stack Lineing Engineering
Wet FGD scrubbers nthuav tawm ib qho kev ua haujlwm hnyav tshaj plaws hauv kev lag luam engineering. Tom qab cov roj flue dhau los ntawm limestone scrubbers, cov roj kub poob rau hauv cov kua qaub dew point ntau (45℃txog 90 degree), thaum cov pa tawm mus txog 15 txog 25 m / s:
Acid Dew Point Dilemma:Sulfur dioxide (SO2) thiab sulfur trioxide (SO3) condense rau hauv corrosive heev dilute sulfuric acid droplets. Dilute sulfuric acid feem ntau corrosive rau hlau thiab pob zeb ntau tshaj 98% concentrated acid.
Dual-Barrier Lineing Kev Tsim Kho:Ib tug raug FGD chimney hauv ob sab phlu muaj ib tug hlau los yog pob zeb sab nrauv kem, ib tug elastomeric los yog asphalt-polyurea waterproofing membrane, ua raws li los ntawm ib tug 65 hli los yog 114 hli tuab chav kawm ntawm acid pov thawj bricks teem nyob rau hauv poov tshuaj silicate mortar.
Aerodynamic Resistance:Lub ntsej muag glazed lossis semi-glazed ntawm peb cov extruded acid pov thawj cib minimizes roj cab thiab tiv taus yaig los ntawm cov huab cua ya ya tshauv.
Nyob rau hauv ib puag ncig qhuav boiler ductwork qhov kub hloov pauv sai tshaj 900 degree, cov qauv tsim ua ke ua ke acid resistant brickwork nrog thaub qab.ceramic fiber daim pamrwb thaiv tsev los tswj thermal expansion.
Mortar Selection: Matching Chemical Mortar rau Acid Exposure
Ib qho tshuaj-resistant cib hauv ob sab phlu tsuas yog ruaj raws li nws cov mortar pob qij txha. Siv cov txheej txheem refractory cement nyob rau hauv ib puag ncig acid yuav ua rau tag nrho kev sib koom ua ke tsis pub dhau hnub.
Kev teeb tsa kev lag luam yuav tsum tau tshwj xeeb cov tshuaj sib txuas mortars:
Potassium Silicate Mortar (Inorganic):
Qhov kub thiab txias: mus txog 900 degree
Chemical Resistance: Zoo heev tiv thaiv txhua qhov ntau ntawm sulfuric, nitric, thiab hydrochloric acids.
Cov yam ntxwv tseem ceeb: Tsis tsim cov efflorescence zoo li sodium silicate mortars. Yuav tsum tau rau chimney stacks thiab kub gas ducts.
Vinyl Ester thiab Epoxy Resin Mortars (Organic):
Qhov Kub Kub: Txog 120℃(Vinyl Ester) lossis 80℃(Epoxy)
Chemical Resistance: Exceptional resistance rau alternating acid-alkali tej yam kev mob thiab ntub tshuaj immersion.
Lub ntsiab feature: Impermeable rau cov kua hydrostatic siab; kev lag luam tus qauv rau cov tshuaj cog ntoo flooring thiab acid pickling basins.
Daim ntawv thov Joint Rule:Cib-rau-cib mortar pob qij txha yuav tsum tau tuav nruj nreem ntawm 2.0 hli thiab 3.0 hli. Txhua qhov sib koom ua ke yuav tsum yog 100% puv siv cov txheej txheem puv txaj kom tiv thaiv cov hnab tshos qhov twg acid condensate tuaj yeem ua luam dej.
Rau cov txheej txheem kub-kub rau qhov chaw sab nraum cov kua qaub ntxuav cov cheeb tsam, cov parefractory mortarmuab kev daws teeb meem kev lag luam.
Factory Production Benchmarks & Procurement Guidelines
Thaum txiav txim export kom muaj nuj nqis ntawm cov kua qaub resistant bricks, coj mus muag procurement managers yuav tsum tswj nruj zoo xyuas:
Acid Solubility Test (ASTM C279):Peb boiled crushed 4.75 hli cib particles nyob rau hauv 1: 1 sulfuric acid rau 48 teev kom paub meej tias tag nrho solubility poob tseem zoo hauv qab ASTM 8.0% qhov pib (peb cov khoom raug kuaj sim ntawm 2.0% thiab 3.5%).
Dimensional Tolerances:Siv automated hydraulic pressing thiab tunnel kiln firing, peb cov qauv cib ua tiav qhov ntev ntawm ± 1.5 hli ntawm qhov ntev thiab dav, thiab ± 1.0 hli ntawm tuab, txo qis ntawm qhov chaw sib tsoo.
Seaworthy Ntim:Cov khoom xa tawm tau ntim rau ntawm lub luag haujlwm hnyav, fumigated ntoo pallets (ISPM 15 raws), banded nrog high-tensile steel straps, thiab qhwv hauv UV-resistant waterproof polyethylene stretch hoods kom tsis txhob ya raws ua ntej kev teeb tsa.
Cov ntsiab lus lag luam:
MOQ:10 Tons (kwv yees . 3,500 tus qauv ncaj cib) lossis puv 20ft thawv (kwv yees . 24 txog 26 metric tons / 8,000 rau 9,000 cib).
Standard Cib Dimensions:230 x 114 x 65 mm (9 x 4.5 x 2.5 nti), 230 x 114 x 76 mm, sab arch, radial wedge cib rau cov kab hluav taws xob ncig, thiab kev cai tus nplaig-thiab-groove duab.
Standard Lead Time:10 mus rau 15 hnub rau cov qauv hauv Tshuag; 25 hnub rau kev cai radius chimney cib.
FOB Chaw nres nkoj:Qingdao / Tianjin / Lianyungang, Suav teb.
Cov ntaub ntawv muab:Mill Test Certificate, ASTM C279 Independent Lab Test Report, MSDS, thiab Certificate of Origin (CO).
Cov lus nug nquag nug (FAQ)
Cov kua qaub pov thawj cib puas tuaj yeem siv los ua hluav taws xob ncaj qha rau hauv lub qhov cub kub?
Tsis yog. Thaum cov kua qaub pov thawj cib tiv taus qhov kub txog li 450℃txog 600℃(Hom I / II), lawv tau vitrified nrog tsawg porosity. Yog tias raug hluav taws xob ncaj qha saum 1000℃lossis hnyav thermal shock, lawv cov qauv ntom ntom tsis tuaj yeem ua kom nrawm nrawm nrawm thiab yuav tawg. Rau cov cua kub kub uas tsis muaj kua qaub,alumina silica refractory ciblos yog monolithicrefractory catsableyuav tsum tau teev tseg.
Dab tsi yog qhov txawv ntawm acid resistant cib thiab cov av nplaum liab lub tsev cib?
Lub tsev cib muaj qhov nqus dej siab (12% mus rau 20%), cov ntsiab lus hlau siab, thiab tsis tshua muaj zog compressive (15 mus rau 25 MPa). Thaum raug rau industrial acids, lub tsev cib disintegrate sai heev. Acid pov thawj cib yog tsim nrog high-purity silicates, tag nrho vitrified (dej nqus tsawg dua los yog sib npaug rau 1.5%), thiab ua tiav crushing zog siab tshaj 60 mus rau 70 MPa, tiv taus acid dissolution kiag li.
Yuav ua li cas koj kab ib lub voj voog chimney los yog lub nkoj nrog acid resistant bricks?
Circular linings yuav tsum tsis txhob raug tsim nrog ncaj rectangular bricks txiav rau ntawm qhov chaw, raws li kev txiav cov pob qij txha ua rau wedge gap prone rau acid to. Peb tsim kev cai radial wedge thiab arch bricks (xws li, tus qauv tseem ceeb cib thiab cov duab kos) uas tsim ib qho tseeb curvature nrog uniform 2 hli mortar pob qij txha thoob plaws hauv 360-degree ncig.
Thov Daim Ntawv Qhia Cov Ntaub Ntawv & Lub Hoobkas Ncaj Ncees
Topower Refractory khoom siv ASTM C279 ua raws li cov kua qaub pov thawj cib thiab sib koom ua ke cov poov tshuaj silicate mortars rau cov nroj tsuag hluav taws xob, smelters, thiab cov chaw ua tshuaj lom neeg thoob ntiaj teb.
Direct Factory Inquiry Email:inquiry@topower.tech
Teb cog lus:Cov ntawv tshaj tawm, cov ntawv pov thawj acid solubility kuaj, thiab ua tiav cov kev taw qhia kev xa tuaj hauv 4 teev ua haujlwm.
