LNG - babban ƙarfe na manganese da shawarwarin kayan aikin walda da suka dace

A cikin 2010, POSCO na Koriya ta Kudu, Daewoo Shipbuilding da manyan ƙungiyoyin rarrabuwa na duniya guda biyar sun fara aikin "haɗin gwiwa na haɓaka babban ƙarfe na manganese da kayan walda don ƙarancin zafin jiki", kuma sun sami yawan samar da babban ƙarfe na manganese don tankunan ajiya na LNG. 2015. By Yuni 2022, don karya ta hanyar fasaha kwalban, Koriya ta Kudu ta Daewoo Shipbuilding & Marine Engineering (DSME) da POSCO za su kasance na farko a duniya don shigar da manyan tankunan ajiyar man fetur na LNG mai girma-manganese a kan bikin manyan masu dakon danyen mai (VLCCs) masu amfani da LNG, kuma ya ce ya haɓaka fasahar kera tankin mai daga ƙarfe pretreatment. zuwa walda da kafa.

1. Menene babban karfe manganese?

Babban ƙarfe na manganese don tankunan ajiya na LNG wani ƙarfe ne mai ƙarfe tare da abun ciki na manganese tsakanin 22-25%, wanda ke da ƙarancin ƙarancin zafin jiki da juriya mai ƙarfi, wanda ya fi bayyane fiye da kayan tanki na LNG na al'ada Wannan shine sabon masoyi na tankin ajiya na LNG. kayan da Koriya ta Kudu ta sadaukar don bincike da haɓaka sama da shekaru goma.

2.Brief bincike na nau'in karfe da fa'idodi da rashin amfani ga tankunan ajiya na LNG Abubuwan da muke amfani da su na walda na iya saduwa da waɗannan buƙatu masu ƙarfi: Tun da manyan tankunan ajiyar man fetur na LNG sune ainihin kayan aikin jiragen ruwa masu amfani da makamashin muhalli da kuma dukkan sarkar masana'antar LNG, ka'idodin fasaha suna da tsauri sosai kuma farashin yana da tsada. LNG yawanci ana adanawa kuma ana jigilar su a ƙarƙashin yanayin zafi mara ƙarancin -163°C. "Lambar kasa da kasa don Ginawa da Kayan Aikin Jiragen Ruwa masu Dauke da Gas ɗin Gas a cikin Girma" ana kiranta da "IGC Code". Kayan ƙananan zafin jiki guda huɗu waɗanda za a iya amfani da su don gina LNG sun haɗa da: aluminum gami karfe, Austria Tensitic bakin karfe, austenitic Fe-Ni alloy karfe (wanda kuma aka sani da Invar karfe) da kuma 9% Ni karfe (duba Table 1 don cikakken bayani). yayin da karfe 9% Ni ne aka fi amfani da shi kuma ana amfani da shi sosai don tankunan ajiyar man fetur na LNG. Amma rashin amfani shine cewa farashin har yanzu yana da girma, hanyoyin sarrafawa suna da wahala, ƙarfin yana da ƙananan ƙananan, kuma abun ciki na nickel a cikin samfurin yana da girma. A cikin 'yan shekarun nan, farashin nickel ya ci gaba da karuwa, kuma farashin samfurin ya karu sosai.

4 kayan cryogenic waɗanda za a iya amfani da su a cikin ginin LNG a ƙarƙashin "Lambar IGC"

Kwatancen ƙarfi tsakanin kayan LNG da aka saba amfani da su da sabon babban ƙarfe na manganese

Ultra-low zafin jiki high-manganese karfe, wanda hadawa high ƙarfi, high tauri, da kuma low cost, yana da matukar faffadar aikace-aikace bege a nan gaba LNG man fetur tank tank da kare muhalli madadin man ajiyar tanki kasuwanni kamar ruwa ammonia, ruwa hydrogen, da kuma methanol.

Haɗin kai da buƙatun aikin babban ƙarfe na manganese

Abubuwan Kemikal (ASTM Draft)

Halin injiniya

● Tsarin Crystal: lattice mai siffar siffar fuska (γ-Fe)

● Halatta zafin jiki ：-196℃

● Ƙarfin Haɓaka · 400MPa (58ksi)

● Ƙarfin ƙarfi: 800 ~ 970MPa (116-141ksi)

● Gwajin tasiri na Charpy V-notch>41J a -196℃(-320℉)

Gabatarwa na babban kamfanin mu na manganese karfe madaidaicin kayan walda

A cikin 'yan shekarun nan, mun sadaukar da kanmu ga bincike da ci gaban babban-manganese karfe daidai da walda abubuwan amfani ga LNG ajiya tankuna, da kuma samu nasarar ɓullo da waldi consumables cewa za su iya daidaita kaddarorin high-manganese karfe tushe kayan ga LNG ajiya tankuna. Ana nuna takamaiman kaddarorin a cikin Table 2.

Mechanical Properties na high manganese karfe matching waldi consumables ajiya karfe

Ps.Metal foda core submerged baka waldi waya ga babban manganese karfe rungumi dabi'ar matching juwa GXR-200 ga high manganese karfe

Weldability da samfurin nuni na babban manganese karfe walda kayan amfani ga LNG ajiya tankuna

The weldability na walda consumables ga high manganese karfe aka nuna kamar haka

Electrode (GER-HMA) lebur fillet waldi bayan cire slag 

Electrode (GER-HMA) waldi na kusurwar ɗagawa bayan cire slag    

Sanda walda (GER-HMA) kafin da kuma bayan fillet waldi slag kau

Metal foda core submerged arc (GCR-HMA-S) nuni waldi

Ana nuna samfurori na babban manganese karfe walda sandar walda gidajen abinci kamar haka 

Nuni samfurin walda mai lebur (1G). 

Nuni samfurin walda a tsaye (3G).

Lantarki walda (1G) lankwasawa samfurin nuni

Lantarki walda (1G) lankwasawa samfurin nuni

PS.High manganese karfe an welded tare da walda sanduna 1G da 3G, babu fasa a fuska lankwasawa da baya lankwasawa samfurori, kuma tsaga juriya yana da kyau.