Say grate et sakey a manunan load-bearing tan ventilation component ya inyan ed saray trolley na saray manbiabiahen grate machine tan belt roaster diad saray linya na panag-pellet na iron ore. Say kalidad to so direktan mandetermina ed inkapekder na operasyon, inkaepektibo na produksyon tan gastos ed panmintina na interon linya na produksyon. Say ASTM A297 HH alloy grates ya mankikimey ed mairap iran kondisyon kaiba lay atagey a temperatura, mabetbet ya thermal cycling, dust erosion tan flue gas corrosion, saray ASTM A297 HH alloy grates so nagmaliw ya sankalaknaban ya uusaren ya produkto ed saray planta na pelletizing ed interon mundo lapud ekselentin performance da. Sayan artikulo so mangiiter na komprehensibon introduksion ed sayan klase na parilya, ya sasakbongan toy istruktura, saray kimey, saray kablian na materyales, saray bentaha na produkto, saray kondisyon na pangiyaplika tan saray giya ed panagmintina.
1. Panangipatnag ed saray Rehas parad Pelletizing Plants
1.1 Posisyon tan Gawaen na Produkto
Kabkabat met bilang grate plates odino grate bars, saray pelletizing plant grates et mankakasakey ed saray onkukurang ya trolley tan mankikimey legan na proseso na panagpamaga tan panagpainit na saray green iron ore pellets. Gagawaen da so taloran manunan kimey:
Unona, say panag-awit na karga. Saray parilya et malet ya onsusuportad dukolan na saray berdin pellets tan makasungdo ed tuloytuloy ya pressure na materyal tan yegyeg na operasyon.
Kumadwa, say dagem tan say pansasalat na petang. Saratan so mamapawala na ambetel ya dagem ya onloob ed pellet bed ya parepareho pian nasumpal so dehydration, heating tan preheating na saray pellets.
Komatlo, say pangekal na slag tan say pangigiya ed agos. Say pinon ore powder tan debris et ipapaway ed dugan panaon pian ag-onbara iray dalanan na dagem tan naseguro so maabig ya iyaagus na dagem.
Bilang sakey a high-wear consumable part ed linya na produksyon, say deformed, cracked, jammed odino grabe ya abaraan a grate et pansengegan na ag-inkaparpareho na bentilasyon, degraded kalidad na pellet tan anggan saray ag-implanon panagsara. Kanian, say kalidad na produkto tan say pampili na materyales et importantin tuloy.
1.2 Kondisyon na Panag-operate
Saray rehas et mankikimey ed mairap iran kaliberliber. Say temperatura et manduruman tuloy: 200℃anggad 400℃ed abeban-temperaturan drying zone, 800℃anggad 1000℃ed medium-preheating zone, tan say lokal a temperatura et nayarin onabot ed 1100℃lapud radiation manlapud kiln tail flue gas. Say mabetbet ya start-stop ya operasyon tan pananguman na karga et pansengegan na baleg ya pananguman na temperatura tan graben thermal shock. Kaleganan to, saray rehas et naynay ya napapagaan na iron ore powder, napapagaan na sulfur-ya walay flue gas tan adhesion na slag ya atagey so temperatura to. Say pankakasakey na dakel a destroso et mangiiter na atagey iran kakaukolanen ed atagey a temperatura na grate, resistensya na thermal shock, resistensya ed panag-usar tan resistensya ed corrosion.
2. Saray Materyal ya Kabiangan na ASTM A297 HH Grates
Sayan serye na saray rehas et eksakton ginawa manlapud 25Cr-12Ni austenitic heat-resistant cast steel ya ontutumbok ed ASTM A297 ya estandarte, sakey ya alloy ya atagey so temperatura to ya espisyal ya ginawa parad graben kondisyon na panagtrabaho ed industriya. Saray kablian to et sigpot ya makasumpal ed saray pankaukolan ed panaggawa na pellet.
2.1 Kemikal a Komposisyon
Say kemikal a komposisyon et estrikton ontutumbok ed saray estandarten kakaukolanen (mass fraction): Carbon 0.20%~0.50%, Chromium 24.00%~28.00%, Nickel 11.00%~14.00%. Say Manganese tan Silicon et ag onlampas ed 2.00%; makaderal iran dutak Say phosphorus tan sulfur et limitado ed kulang odino mipara ed 0.04%, say molybdenum kulang o mipara ed 0.50%, ya say balanse et bakal. Say atagey ya Chromium et mangiiter na matalonggaring ya resistensya ed oxidation tan corrosion ed temperatura, bangta say Nickel et mamapabiskeg ed metallographic structure tan mangamper ed masakbay ya pakaandi ed paulit-ulit ya pananguman na temperatura.
2.2 Saray Mekanikal tan Panangilaban ed Petang
Say produkto et walaan na malet ya mekanikal ya performance: Tensile Strength Mas baleg o mipara ed 743 MPa, Yield Strength Mas baleg o mipara ed 389 MPa, Elongation Mas baleg o mipara ed 11%, Brinell Hardness Less o mipara ed 324 HBW. Sarag ton awiten so andukey a panaon ya karga na materyales, ag-ontupak tan napaliisan so ag-onkupas.
No nipaakar ed pakaresisti ed petang, say tuloytuloy ya ligtas ya temperatura na operasyon et manlapud 1040℃anggad 1100 degree, tan sarag ton sungdoan so temporaryon atagey ya temperatura ya anggad 1150℃~1200 degree. Say austenitic ya istruktura et epektibon makaresisti ed atagey a temperatura tan thermal fatigue, kanian saray rehas et ag-onlemew odino onkupas ed atagey a temperatura, odino ag-onkupas ed mansasalatan ya ambetel tan ambetel iran kondisyon.
3. Saray Manunan Bentaha na ASTM A297 HH Grates
No ikompara ed saray parilya ya gawad ordinaryon cast iron tan low-grade heat-resistant steel, saray ASTM A297 HH grates et walaan na prominentin bentaha ed pangiyaplika ed uma, kanian sikara so mas labay ya pilien na industriya.
Maong ya resistensya ed depormasyon
Pansiansiaen so malet ya biskeg na istruktura ed ngalngalin 1000 degree, ya ag-onkukurang, ag-onkukurang odino ag-onkupas. Maong so dalagan na saray trolley ya anggapoy paka-jam.
Mas maabig ya resistensya ed petang
Walay ekselentin thermal stability to pian makaadapta ed mabetbet ya panguuman na temperatura ed saray linya na produksyon. Anggapoy nagagawan bitak o bali legan na thermal expansion tan contraction, kanian nabawasan so frequency na pansasalat tan naseguro so tuloytuloy ya produksyon.
Say resistensya ed panagsulong, anti-baraan tan anti-kabulok ya performance
Say makapal ya istruktura na alloy et makaresisti ed andukey a panaon ya ag-abrasion na iron ore powder tan say corrosion na sulfur- ya walay flue gas to. Say tapew to et ag mainomay ya onpeket na slag odino onpeket na pellet, tan saray gap na bentilasyon et mansiansian ag nabara, kanian ag la kaukolan so regular ya panaglinis.
Andukey so serbisyo tan atagey so gastos ed performance
Say inkalapagan ya performance to et mas maong nen say ordinaryon high-chromium cast iron tan ASTM A297 HF grates, ya say serbisyo to et inmatagey na 30% anggad 50%. No ikompara ed saray atagey a gastos ya ASTM A297 HK grates ya mas atagey so resistensya tod petang, sayan produkto et walaan na katamtaman a presyo tan sigpot ton makasumpal ed saray pankaukolan na manunan panagpagaan tan panagpainit, ya makagamor na sankaabigan ya balanse ed baetan na kalidad tan gastos.
4. Proseso na Panaggawa tan Desinyo na Istruktura
4.1 Teknolohiya na Pan-cast
Say ASTM A297 HH pelletizing grates et ginawa panamegley na precision investment casting tan shell mold casting. Saray castings et walaan na makapal ya loob ya istruktura ya anggapoy depekto a singa saray pores, sand holes tan shrinkage porosity, ya mangiseguro na parepareho ya biskeg. Amin ya asumpal a produkto et ondalan ed solusyon tan aging heat treatment pian sigpot ya naekal so casting stress tan napabiskeg so metallographic structure, pian napaaligwas so inkadukey tan inkasusto na sukat.
4.2 Desinyo na Istruktura
Wala ray nipasal ya profile ya mipara ed nanduruman modelo na kagawaan ed panag-pellet. Say malet ya integral ya istruktura et mangiseguro na pareparehon panagbunog na stress. Saray sankaabigan ya abut tan gap na bentilasyon et mangiter na atagey ya epektibon bentilasyon tan maong ya kapasidad na pangekal na slag, ya manbabalanse ed load bearing tan sirkulasyon na dagem. Say eksakton sukat tan makatunongan iran gap ed panag-assemble so manggagarantiya na maabig ya operasyon na trolley ya anggapoy jamming odino onlelereg a materyales, ya mipara ed saray mainstream ya traveling grate machines tan belt roasters.
5. Giya ed Panpili parad Mipara iran Rehas
Saray nanduruman parilya et nepeg ya pilien unong ed temperatura na saray linya na pelletizing:
ASTM A297 HF Grate: Say sankatageyan ya temperatura na operasyon et manga 900℃ya abeba so gastos. Saya so onaplika labat ed arap ya abeban-temperatura na pamamagaan tan ag nayarin usaren ed kapegleyan tan atagey-pemperaturan preheating sections.
ASTM A297 HH Grate: Makatepel ed petang ya anggad 1100℃ya walay balansin performance tan atagey ya gastos. Saya so onkana ed amin ya core drying tan preheating zones tan manserbin manunan general-purpose model parad pelletizing plants.
ASTM A297 HK Grate: Say sankatageyan ya resistensya ed petang ya anggad 1200 degree, balet ta atagey so gastos ed panagsaliw. Saya so uusaren labat parad atagey a temperatura na panag-iluto tan matalag ya uusaren ed saray conventional pelletizing production lines.
6. On-Saray Espesipikasyon ed Operasyon tan Panmintina
Say suston operasyon tan inagew-agew ya panmintina et lalon mamaawang ed bilay na ASTM A297 HH grates:
Kontrolen ya maong so temperatura na operasyon. Paliisan so andukey a panaon ya operasyon ed tagey na 1100℃pian ontunda so itatatken na materyal.
Tumboken so estandarten paraan na gapoan-itunda. Bawasan so emergency shutdown tan say mapilit ya maples ya panag-cooling pian nabawasan so pakaderal na thermal shock.
Manggawa na regular ya inspeksion ed inagew-agew. Manpokus ed pan-check na deformation, cracks tan blockage. Salatan iray aderal a parte ed dugan panaon pian napaliisan so segundaryon pakaderal na saray asingger a kabiangan.
Mantinien so manepeg a kapal na pellet bed pian naprebentaan so sobran karga tan lokal ya sobran petang lapud alablabas a kapal na materyales.
7. Konklusyon
Lapud napanmatalkan ya alloy material, sopistikadon teknolohiya na panag-cast tan working-condition-oriented structural design, saray ASTM A297 HH grates et perpekton makaadapta ed mairap ya kaliberliber na atagey a temperatura, thermal cycling, abrasion tan corrosion ed saray linya na iron ore pelletizing. Lapud walaan na malet ya panag-awit na karga, epektibon bentilasyon, baleg ya resistensya ed crack tan deformation tan andukey a bilay na serbisyo, say produkto et walaan met na makapadinayew iran bentaha ed gastos.
Bilang sakey a manunan nausar a parte na kagawaan ed panag-pellet, say ASTM A297 HH grate et mangiseguro na epektibo, malet tan tuloytuloy ya operasyon na saray linya na produksyon, tan epektibon mamapaabeba ed gastos ed panagsaliw na spare parts, panmintina na shutdown tan manual ya kimey. Saya so mas labay ya produkto na saray managgaway pellet.
