Grate ke karolo ea core load{0}}ea ho beleha le ea moea e kentsoeng holim'a literoli tsa mochini o tsamaeang oa grate le li-roaster tsa mabanta ka mehala ea tšepe ea pelletizing. Boleng ba eona bo khetholla ka ho toba botsitso ba ts'ebetso, katleho ea tlhahiso le litšenyehelo tsa tlhokomelo ea mohala oohle oa tlhahiso. E sebetsa tlas'a maemo a thata ho kenyelletsa mocheso o phahameng, ho palama libaesekele khafetsa, khoholeho ea lerōle le kutu ea khase ea flue, ASTM A297 HH alloy grates e se e le sehlahisoa se sebelisoang haholo ho hlahisa limela lefatšeng ka bophara ka lebaka la ts'ebetso ea tsona e ntle ka kakaretso. Sehlooho sena se fana ka kenyelletso e pharaletseng ea mofuta ona oa grate, e koahelang sebopeho sa eona, mesebetsi, thepa ea thepa, melemo ea sehlahisoa, maemo a kopo le tataiso ea tlhokomelo.
1. Kakaretso ea Grates bakeng sa Pelletizing Plants
1.1 Boemo ba Sehlahiswa le Mesebetsi
E boetse e tsejoa e le lipoleiti tsa grate kapa li-grate bar, li-grate tsa limela tsa pelletizing li bokelloa ka lihlopha ka li-trolleys tse tsamaeang 'me li sebetsa nakong eohle ea ho omisa le ho futhumatsa pele ho li-pellets tse tala tsa tšepe. Ba etsa mesebetsi e meraro ea mantlha:
Ntlha ea pele, ho tsamaisa thepa. Li-grate li tšehetsa ka mokhoa o tsitsitseng bethe ea li-pellets tse tala 'me li mamella khatello e tsoelang pele ea thepa le ho sisinyeha ha ts'ebetso.
Ea bobeli, moea le phapanyetsano ea mocheso. Li nolofalletsa moea o chesang hore o kene ka har'a bethe ea pellet ka ho lekana ho tlatsa ho felloa ke metsi, ho futhumatsa le ho futhumatsa pele ho li-pellets.
Ea boraro, ho tlosoa ha slag le tataiso ea ho phalla. Phofo e ntle ea ore le lithōle li ntšoa ka nako ho thibela ho thijoa ha litsela tsa moea le ho netefatsa hore moea o phalla hantle.
Joalo ka karolo e phahameng{{0}e ka sebelisoang mothating oa tlhahiso, grate e holofetseng, e petsohileng, e petehileng kapa e thibaneng haholo e tla lebisa ho moea o sa lekaneng, boleng bo tlase ba pellet esita le ho koala ho sa reroang. Ka hona, boleng ba sehlahisoa le khetho ea thepa li bohlokoa haholo.
1.2 Maemo a Tshebetso
Li-grates li sebetsa libakeng tse boima haholo. Thempereichara e fapana haholo: likhato tse 200 ho isa ho tse 400 sebakeng sa -mohatsela o omisang mocheso o tlase, 800 degrees ho isa ho 1000℃sebakeng se mahareng-mocheso oa preheating, 'me mocheso oa lehae o ka fihla ho 1100 degrees ka lebaka la mahlaseli a tsoang ho kiln tail flue gas. Khafetsa -ho emisa ts'ebetso le litokiso tsa thepa li baka liphetoho tse kholo tsa mocheso le mocheso o matla haholo. Ho sa le joalo, li-grate li lula li taboha ke tšepe ea ore powder, corrosion by sulfur{11}e nang le flue gas le adhesion ea{12}}thempereichara e phahameng. Litšenyehelo tse ngata tse kopantsoeng li behile litlhokahalo tse phahameng holim'a grate{14}}e hanyetsanang le mocheso o phahameng, ho hanyetsa mocheso oa mocheso, ho se sebetse hantle le ho corrosion resistance.
2. Thepa ea Thepa ea ASTM A297 HH Grates
Letoto lena la li-grates li entsoe ka nepo ho tloha ho 25Cr-12Ni austenitic heat-resistant cast steel tse lumellanang le ASTM A297 standard, e leng motsoako oa mocheso o phahameng o etselitsoeng maemo a thata a indasteri. Thepa ea eona e kopana ka botlalo le litlhoko tsa ts'ebetso ea tlhahiso ea pellet.
2.1 Sebopeho sa Lik'hemik'hale
Sebopeho sa lik'hemik'hale se latela ka tieo litlhoko tse tloaelehileng (karolo ea boima): Carbon 0.20% ~ 0.50%, Chromium 24.00% ~ 28.00%, Nickel 11.00% ~ 14.00%. Manganese le Silicon ha li fete 2.00% ka ho latellana; ditshila tse kotsi Phosphorus le Sebabole di lekanyeditswe ho Ka tlase ho kapa ho lekana le 0.04%, Molybdenum e Tlase kapa e lekana le 0.50%, ka Tshipi e le tekanyo. Litaba tse phahameng tsa Chromium li fana ka tsela e ikhethang{11}}ea ho hanyetsa oxidation le ho bola, ha Nickel e tsitsisa sebopeho sa metallographic le ho thibela ho se sebetse pele ho nako tlas'a ho feto-fetoha ha mocheso khafetsa.
2.2 Thepa ea Mechini le ea ho Thibela Mocheso
Sehlahisoa se na le ts'ebetso e tsitsitseng ea mochine: Matla a Tsitsitseng A Maholo kapa a lekana le 743 MPa, Matla a Puno a Maholo kapa a lekana le 389 MPa, Elongation E kholo ho feta kapa e lekana le 11%, Brinell Hardness E ka tlase kapa e lekana le 324 HBW. E ka mamella-matla a matle nako e telele, ea hanana le ts'ebetso le ho qoba ho robeha ha brittle.
Mabapi le ho hanyetsa mocheso, mocheso o tsoelang pele o bolokehileng oa ho sebetsa o tloha ho 1040 ho isa ho 1100 degree, 'me o khona ho mamella mocheso o phahameng oa nakoana ho fihlela ho 1150 ° ~ 1200℃. Sebopeho sa "austenitic" se sebetsa hantle ho thibela mocheso o phahameng-ho theoha ha mocheso le mokhathala o mongata, kahoo li-grate li ke ke tsa kokobela kapa tsa holofala ha mocheso o le holimo, kapa hona ho petsoha tlas'a maemo a chenchana a chesang le a batang.
3. Melemo ea Konokono ea ASTM A297 HH Grates
Ha ho bapisoa le li-grates tse entsoeng ka tšepe e tloaelehileng le{0}mocheso oa boemo bo tlase-litšepe tse sa khoneng ho mamella metsi, li- grates tsa ASTM A297 HH li bontša melemo e hlahelletseng ts'ebelisong ea sebaka, e leng se etsang hore e be khetho e ratoang ke indasteri.
E babatsehang deformation hanyetsa
Boloka matla a sebopeho se tsitsitseng hoo e ka bang likhato tse 1000, ntle le ho kobeha, ho putlama kapa ho warpage. Li-trolleys li tsamaea hantle ntle le ho hloleha ho hoholo.
Ho hanyetsa mocheso o phahameng oa mocheso
Ka botsitso bo botle ba mocheso ho ikamahanya le liphetoho khafetsa mocheso mehalang ea tlhahiso. Ha ho mapetsong kapa mapheo a hlahang nakong ea ho atolosoa le ho fokotseha ha mocheso, ho fokotsa makhetlo a mangata le ho netefatsa tlhahiso e tsoelang pele.
Wear resistance, anti{0}}thibelo le{1}}anti-corrosion performance
Mohaho o motenya oa alloy ha o khone ho hohoa ha nako e telele-ke phofo ea tšepe le ho bola ha sebabole-e nang le khase ea flue. Bokaholimo ha bo na tloaelo ea ho khomarela li-slag kapa ho khomarela pellet, 'me likheo tsa moea li lula li sa koaloa, li fokotsa mosebetsi oa ho hloekisa kamehla.
Bophelo bo bolelele ba tšebeletso le ts'ebetso e phahameng ea litšenyehelo
Ts'ebetso ea eona ka kakaretso e betere ho feta{0}}chromium cast iron e tloaelehileng e phahameng le li-grates tsa ASTM A297 HF, 'me bophelo ba ts'ebeletso bo eketsehile ka 30% ho isa ho 50%. Ha ho bapisoa le li-grate-tse phahameng tsa ASTM A297 HK tse hanyetsanang le mocheso o phahameng, sehlahisoa sena se na le theko e itekanetseng 'me se kopana ka botlalo le litlhoko tsa libaka tse kholo tsa ho omisa le ho futhumatsa pele, ho finyella tekanyo e nepahetseng pakeng tsa boleng le theko.
4. Mokhoa oa Tlhahiso le Moralo oa Sebopeho
4.1 Theknoloji ea ho Lahlela
Li-grate tsa ASTM A297 HH tsa pelletizing li entsoe ka mokhoa o nepahetseng oa ho etsa matsete le ho lahla hlobo ea khetla. Li-castings li na le sebopeho sa ka hare se teteaneng ntle le liphoso tse kang li-pores, masoba a lehlabathe le shrinkage porosity, ho netefatsa matla a tšoanang ka kakaretso. Lihlahisoa tsohle tse felileng li fumana tharollo le kalafo ea mocheso ea botsofali ho imolla khatello ea maikutlo le ho tsitsisa sebopeho sa metallographic, e le ho matlafatsa nako e telele le ho nepahala ha boholo.
4.2 Moralo oa Sebopeho
Liprofaele tse ikhethileng li teng ho tsamaisana le mefuta e fapaneng ea lisebelisoa tsa pelletizing. Sebopeho se tiileng sa motsoako se tiisa hore ho ajoa ha khatello e tšoanang. Likoti tse ntlafalitsoeng tsa moea le likheo li fana ka ts'ebetso e phahameng ea moea le bokhoni bo botle ba ho tlosa slag, ho tsamaisa mojaro o leka-lekaneng le ho potoloha ha moea. Boemo bo nepahetseng ka kakaretso le likheo tsa kopano tse utloahalang li tiisa hore teroli e sebetsa ka thelelo ntle le ho koenya kapa ho lutla ha thepa, e tsamaellanang le metjhini e tloaelehileng ea terata e tsamaeang le tse halikiloeng ka mabanta.
5. Tataiso ea Khetho bakeng sa Grates e Tšoanang
Li-grate tse fapaneng li tla khethoa ho latela libaka tsa mocheso oa mela ea pelletizing:
ASTM A297 HF Grate: Mocheso o phahameng oa ts'ebetso o ka bang 900℃ka theko e tlase. E sebetsa feela sebakeng se ka pele se omisang mocheso-'me e ke ke ea sebelisoa libakeng tse mahareng le tse phahameng-ka likarolo tsa preheat.
ASTM A297 HH Grate: Mocheso-o hanana le ho fihla ho 1100℃ka ts'ebetso e leka-lekaneng le ts'ebetso ea litšenyehelo tse holimo. E lumellana le libaka tsohle tsa mantlha tsa ho omisa le ho futhumatsa pele 'me e sebetsa e le morero oa kakaretso- bakeng sa limela tsa pelletizing.
ASTM A297 HK Grate: Ho hanyetsa mocheso o phahameng ka ho fetisisa ho fihla ho likhato tse 1200, leha ho le joalo ka theko e phahameng ea theko. E amohetsoe feela bakeng sa{3}}libaka tsa mocheso o phahameng haholo, 'me ha e sebelisoe hangata mekhoeng ea tlhahiso ea pelletizing.
6. Litlhaloso tsa Tshebetso le Tlhokomelo sebakeng sa-
Ts'ebetso e nepahetseng le tlhokomelo ea letsatsi le letsatsi li ka eketsa bophelo ba ts'ebeletso ea ASTM A297 HH grates:
Laola mocheso o sebetsang ka thata. Qoba ho sebetsa ha nako e telele{1}}ka holimo ho 1100℃ho fokotsa botsofali.
Latela mekhoa e tloaelehileng ea ho qala{0}mekhoa ea ho emisa. Fokotsa ho koala ha maemo a tšohanyetso le ho qobella ho pholisa ka potlako ho fokotsa ts'abo ea mocheso.
Etsa tlhahlobo ea kamehla ea letsatsi le letsatsi. Tsepamisa maikutlo ho hlahloba deformation, mapetsong le ho thibela. Fetola likarolo tse senyehileng ka nako ho qoba tšenyo ea bobeli ho likarolo tse haufi.
Boloka botenya bo loketseng ba bethe ea pellet ho thibela moroalo o mongata le mocheso o feteletseng oa lehae o bakoang ke likarolo tse teteaneng haholo.
7. Qetello
Ka lisebelisoa tse tšeptjoang tsa alloy, theknoloji e tsoetseng pele ea ho lahla le ho sebetsa-maemo{1}}moqapi o tsepamisitsoeng, ASTM A297 HH grates e ikamahanya hantle le tikoloho e thata ea mocheso o phahameng, ho palama libaesekele, ho khoholeha le ho bola meleng ea tšepe. E na le meroalo e tsitsitseng, moea o kenang hantle, ho hanyetsa ha crack le deformation le bophelo bo bolelele ba tšebeletso, sehlahisoa se boetse se ithorisa ka melemo e babatsehang ea litšenyehelo.
E le karolo ea bohlokoa e ka sebelisoang bakeng sa lisebelisoa tsa pelletizing, ASTM A297 HH grate e netefatsa ts'ebetso e sebetsang, e tsitsitseng le e tsoelang pele ea mela ea tlhahiso, 'me e fokotsa ka katleho litšenyehelo tsa ho reka likarolo tse ling, tlhokomelo ea ho koala le mosebetsi oa matsoho. Ke sehlahisoa se batloang se batloang ke baetsi ba li-pellet.
