Grate gaw, magri nhprang n-gun rawng ai line ni hta hkawm sa ai grate jak ni hte belt roasters ni a trolley ni hta jung da ai core load-bearing hte nbung n-gun rawng ai arung arai langai mi re. Shi a quality gaw, galaw shapraw ai line ting a bungli galaw ai lam hta ngang grin ai lam, galaw shapraw ai atsam hte gram lajang ai manu hpe hkrak dawdan ya ai. ASTM A297 HH alloy grates ni gaw, n-gun ja ai, n-gun ja ai, n-gun ja ai, nhprang wan n-gun n-gun n-rawng ai zawn re ai, grai sawng ai masa ni hta bungli galaw ai majaw, mungkan ting na pelletizing plant ni hta grau nna jai lang ai mainstream product tai wa sai. Ndai laika hta ndai zawn re ai grate a lam hpe hkrak tup tsun dan da ai rai nna, shi a hkrang masa, bungli galaw ai lam, arung arai ni a akyu ara, jai lang ai masa hte gram lajang ai lam ni hpe tsun dan da ai.
1. Overview of Grates for Pelletizing Plants
1.1 Product a shara hte magam bungli ni
Grate plates (sh) grate bars ngu nna mung shamying ai, pelletizing plant grates ni hpe shamu shamawt nga ai trolley ni hta hpung hku nna shinggyin tawn da nna, hpraw ai magri nlung ni hpe hkyet kau ai hte shawng katsi shangun ai lam yawng hta bungli galaw ma ai. Shanhte gaw madung bungli masum hpe galaw ma ai:
Langai, lit hkam ai lam. Dai grates ni gaw green pellets ni a yupku hpe ngang grin hkra madi shadaw ya nna, matut manoi nga ai arung arai ni a n-gun hte bungli galaw ai shaloi byin ai n-gun hpe hkam sharang lu ai.
Lahkawng, nbung hte katsi ai hpe galai shai ai lam. Shanhte gaw nbung katsi hpe pellet bed kata de maren mara shang shangun nna, pellet ni hpe hka n-gun yawm shangun ai, katsi shangun ai hte shawng katsi shangun ai hpe ngut kre hkra galaw ya ai.
Masum, slag hpe shaw kau nna lwi ai lam matsun ai lam. Nbung shang ai lam ni hpe pat shingdang ai lam n byin na matu hte nbung hpe asan sha lwi shangun na matu, Fine ore powder hte debris ni hpe aten dep shapraw kau ai.
Production line hta high-wear consumable part langai hku nna, n kaja ai, n-gun n rawng ai, n-gun n rawng ai (sh) grai pat da ai grate gaw nbung n bung ai, pellet quality hpe hkra machyi shangun ai hte n myit mada ai sha pat kau ai lam ni hpe pyi byin shangun na re. Dai majaw, product quality hte material lata ai lam gaw grai ahkyak nga ai.
1.2 Magam bungli galaw ai masa
Grates ni gaw grai ra kadawn ai makau grup yin ni hta bungli galaw ai. Katsi ai shara gaw grai shai hkat ai: n-gun n law ai-katsi ai shara hta 200℃kaw nna 400℃du hkra, katsi ai shara hta 800℃kaw nna 1000℃du hkra, kil kaw na pru wa ai radiation a majaw buga na katsi ai flutail gas a majaw 1100℃du hkra du wa chye ai. Aten lang start-stop galaw ai lam ni hte load hpe galai shai ai lam ni a majaw, nbung laru grai galai shai wa nna, grai sawng ai nbung laru byin wa chye ai. Dai aten hta, grates ni hpe magri nhprang n-gun n-gun hte n-gun n-gun n-rawng ai, sulfur-lawm ai wan n-ga hte n-gun ja ai-n-gun ja ai slag ni a n-gun n-rawng ai lam ni hpe ayan hkrum sha nga ai. Hpa majaw nga yang, n-gun law law hpe hpawng de ai shaloi, grate a high-temperature hpe ninghkap lu ai, thermal shock hpe ninghkap lu ai, n-gun n-gun hte n-gun n-gun hpe ninghkap lu ai atsam ni hpe ra sharawng ai lam kaba ni hpe tawn da ya ai.
2. ASTM A297 HH nlung ni a arung arai atsam marai ni
Ndai grates ni hpe 25Cr-12Ni austenitic heat-hkam sharang lu ai ASTM A297 madang hte maren, grai sawng ai bungli galaw ai masa ni a matu laksan galaw da ai n-gun ja ai n-gang kaw na hkrak hkrak galaw da ai re. Shi a atsam marai ni gaw pellet galaw shapraw ai bungli galaw ra ai lam ni hpe tup hkrak hkap la lu ai.
2.1 Chemical n-gun
Dai tsi mawan ni hta ra kadawn ai lam ni hpe atsawm sha hkan sa ai (mass fraction): Carbon 0.20%~0.50%, Chromium 24.00%~28.00%, Nickel 11.00%~14.00%. Mangan hte Silicon gaw 2.00% hta n jan ai; n kaja ai awu asin ni Phosphorus hte Sulphur hpe 0.04% hta n-pu (sh) maren sha, Molybdenum hpe 0.50% hta n-pu (sh) maren sha, Iron hpe shadawn sharam tawn da ai. Chromium law ai gaw, n-gun ja ai-n-gun ja ai oxidation hte n-gun n-gun hpe ninghkap lu ai atsam hpe jaw ya nna, Nickel gaw metallographic structure hpe ngang grin shangun nna, n-gun n-gun bai nhtang galai shai ai npu hta aten garai n du yang hkrat sum ai lam hpe pat shingdang ya ai.
2.2 Hpaji hte katsi ai hpe ninghkap lu ai atsam
Ndai arung arai gaw ngang grin ai jak rung bungli galaw lu ai atsam nga ai: Tensile N-gun 743 MPa hta grau ai (sh) dai hte maren, Yield N-gun 389 MPa hta grau ai (sh) dai hte maren, Elongation 11% hta grau ai (sh) dai hte maren, Brinell Hardness 324 HBW hta n law ai (sh) dai hte maren sha re. Shi gaw aten galu-arung arai lit hpe hkam sharang lu ai, hkra machyi ai hpe ninghkap lu ai hte brittle fracture hpe koi lu ai.
1040℃kaw nna 1100℃du hkra, matut manoi shim lum ai hku bungli galaw ai nbung katsi ai lam hpe hkam sharang lu ai, 1150℃~1200℃du hkra katsi katsang re ai nbung katsi ai lam hpe hkam sharang lu ai. Austenitic structure gaw, n-gun ja ai-katsi ai shara hta hprawng hkawm ai hte n-gun ja ai n-gun yawm ai hpe atsawm sha ninghkap lu ai majaw, n-gun ja ai shara hta grates ni gaw n-gun n rawng ai (sh) n-gun n rawng ai, katsi ai hte katsi ai masa ni hpe galai shai ai aten hta mung n-gun n rawng ai.
3. ASTM A297 HH n-gang ni a madung akyu ara ni
ASTM A297 HH grates ni gaw, n-gun n law ai magri hte n-gun n law ai magri hte galaw ai grates ni hte shingdaw yu yang, hkai sun hta jai lang ai hta dan dawng ai akyu ni hpe madun dan ai majaw, ndai hpaga lam a matu grau ra sharawng ai lata la ai lam rai nga ai.
Grai kaja ai hkrang nsam hpe ninghkap lu ai atsam
1000℃grup yin hta ngang grin ai npawt nhpang n-gun hpe makawp maga u, n-gun n rawng ai, hkrat sum ai (sh) n-gun n rawng ai. Trolley ni gaw jamming hkrat sum ai lam n nga ai sha, asan sha hkawm sa nga ai.
Grau kaja ai thermal shock hpe ninghkap lu ai atsam
Hpaga galaw ai lam ni hta nbung katsi ai lam ayan galai shai ai hpe hkap la lu na matu grai kaja ai thermal stability hte. Thermal expansion hte contraction galaw ai shaloi, n-gun n rawng ai (sh) n-gun n rawng ai, galai shai ai lam hpe shayawm ya lu nna, matut manoi galaw shapraw lu ai.
Hpun n-gun hpe ninghkap lu ai,-hkap pat shingdang lu ai hte -hten run lu ai atsam
Dai dense alloy structure gaw, magri nhprang n-gun hte aten galu-hpyen n-gun hpe ninghkap lu nna, sulfur-lawm ai wan n-gun hpe mung ninghkap lu ai. Dai ntsa gaw slag n-gun n rawng ai (sh) pellet n-gun n rawng ai, nbung n-gun n rawng ai shara ni gaw n-gun n rawng ai majaw, ayan san seng ai bungli hpe shayawm kau ya ai.
Galu kaba ai magam bungli hte manu dan ai bungli galaw lu ai
Shi a yawng hkra galaw lu ai atsam gaw, shinggyim masha ni lang ai high-chromium hpri hte ASTM A297 HF grates ni hta grau kaja ai, n-gun atsam gaw 30% kaw nna 50% du hkra jat wa ai. ASTM A297 HK manu dan ai n-gun grau ja ai hte shingdaw yu yang, ndai arung arai gaw manu n-gun n-rawng ai hte, n-gun n-rawng ai hte n-gun n-rawng ai ginra ni a ra sharawng ai lam ni hpe tup hkrak hkap la lu ai majaw, n-gun hte manu lapran hta kaja dik ai rap ra lam hpe lu la ai.
4. Hpaga lam hte hkrang shapraw ai lam
4.1 Casting hpaji masa
ASTM A297 HH pelletizing grates ni hpe hkrak tup ai gumhpraw bang ai hte shell n-gun dat ai hku nna galaw shapraw ai. Dai castings ni gaw, n-gup magap, nhpu hka htung hte shrinkage porosity zawn re ai n-gun kya ai lam ni n lawm ai, n-gun ja ai kata na hkrang hpe madun dan ai majaw, n-gun yawng hpe langai sha re ai hku hkam la lu ai. Hpang jahtum na arung arai yawng gaw, n-gun rawng ai lam hpe tsep kawp yeng seng kau ya lu na matu hte n-gun rawng ai lam hpe n-gun rawng hkra galaw ya lu na matu, n-gun rawng ai lam hte dimensional accuracy hpe npawt nhpang hku nna jat ya lu na matu, n-gun rawng ai lam hte asak kaba wa ai n-gun rawng ai lam hpe galaw ai.
4.2 Hkrang hkrang shapraw ai lam
Pelletizing galaw ai arung arai ni a hkrang amyu myu hte maren, laksan galaw da ai profile ni hpe lu la mai ai. Dai ngang kang ai integral structure gaw, n-gun atsam ni hpe maren mara garan gachyan ya lu ai. Optimized nbung hka htung ni hte gap ni gaw nbung n-gun grai ja ai hte slag hpe shaw kau lu ai atsam kaja jaw ya ai, nbung n-gun hpe rap ra hkra galaw ya ai. Dai majaw, n-gun n rawng ai (sh) arung arai ni n pru ai sha, trolley hpe hkrak hkrak galaw lu na matu, n-gun rawng ai hkawm sa ai grate jak ni hte belt roasters ni hte htuk manu ai.
5. Similar Grates ni a matu lata la ai lam matsun
Grate amyu myu hpe pelletizing line ni a nbung katsi ai shara ni hte maren lata la ra ai:
ASTM A297 HF Grate: Manu n law ai sha, 900℃grup yin hta bungli galaw lu ai n-gun grau law ai. Dai gaw shawng na npu-hkum hkrang n-gun n law ai shara hta sha mai lang ai rai nna, n-gun n law ai-htum n-gun n law ai shara ni hta n mai lang ai.
ASTM A297 HH Grate: 1100℃du hkra katsi ai hpe hkam sharang lu ai hte rap ra ai bungli galaw lu ai hte manu dan ai bungli galaw lu ai. Dai gaw core hkyet ai hte shawng katsi ai shara yawng hta hkrak nna, hpun ni hpe pelletize galaw na matu madung-yaw shada ai hkrang langai hku nna magam gun nga ai.
ASTM A297 HK Grate: 1200℃du hkra n-gun ja dik htum hpe ninghkap lu ai , raitim, mari la na matu manu kaba ai. Dai hpe grai tsaw ai-katsi ai wan hkru ai shara ni a matu sha hkap la nna, htunghking hku galaw ai pelletizing galaw shapraw ai ladat ni hta n law htum lang ai.
6. On-site bungli galaw ai lam hte gram lajang ai lam ni
Hkrak ai hku galaw ai hte shani shagu gram lajang ai gaw ASTM A297 HH grates ni a prat hpe grau galu shangun lu ai:
Bungli galaw ai nbung katsi ai hpe atsawm sha hkang u. 1100℃jan hta aten galu- galaw ai hpe koi nna, arung arai ni a asak kaba wa ai hpe shayawm kau u.
Standard start-jahkring ai ladat ni hpe hkan sa u. Thermal shock hkra machyi ai lam hpe shayawm lu na matu lawan ladan pat kau ai lam hte atik anang lawan ai hku katsi shangun ai lam ni hpe shayawm kau u.
Shani shagu ayan jep joi ai lam galaw u. Deformation, n-gun n rawng ai hte pat da ai hpe jep yu na matu myit maju jung u. Hten za mat ai daw ni hpe aten dep galai kau nna, makau grup yin na daw ni hpe lahkawng lang ngu na hkra machyi ai lam n byin hkra galaw u.
Grai n-gun ja ai arung arai n-gun ni a majaw byin pru wa ai n-gun grai ja ai hte buga ginra hta grai katsi mat ai hpe koi gam na matu, pellet bed a n-gun hpe htap htuk ai hku tawn da ra ai.
7. Ngut nna tsun ai
Kam hpa mai ai alloy arung arai, grai kungkyang ai casting hpaji masa hte bungli galaw ai-masa-madung tawn ai hkrang masa hte, ASTM A297 HH grates ni gaw, n-gun ja ai makau grup yin hta, n-gun ja ai, n-gun n-gun n-rawng ai, n-gun n-rawng ai hte n-gun ja ai n-gun ja ai makau grup yin ni hpe hkum tsup hkra htuk manu hkra galaw lu ai. Dai majaw, n-gun ja ai lit hpe hkam sharang lu ai, nbung hpe atsawm sha shapraw ya lu ai, n-gun kaba ai hte n-gun n rawng ai hpe ninghkap lu ai hte galu kaba ai prat hpe mung hkam la lu ai, ndai arai gaw mau hpa manu jahpu hpe mung gumrawng nga ai.
Pelletizing arung arai ni a matu ahkyak ai jai lang ai arung arai langai hku nna, ASTM A297 HH grate gaw, galaw shapraw ai ladat ni hpe atsawm sha, ngang grin ai hte matut manoi galaw lu hkra galaw ya ai, spare parts mari ai, pat kau ai gram lajang ai hte lata hte galaw ai bungli ni hta jai gumhpraw ni hpe hkrak hkra shayawm ya lu ai. Pellet galaw ai ni a matu ra sharawng ai matching product re.
