1. Cov Lus Txhais CO2 roj thaiv kab hlau vuam yog cov pa hlau tiv thaiv hlau arc vuam txheej txheem siv cov pa roj carbon CO2 nrog kev huv siab tshaj 99.8% (ntim txheej txheem) raws li thaiv cov pa roj. Kev hloov pauv luv luv, tshuaj tsuag hloov pauv thiab hloov tshuaj tsuag mem tes tuaj yeem siv rau vuam. Nws tuaj yeem siv rau qhov chaw vuam, vuam ntsug, vuam kab rov tav, vuam siv nyiaj ua ntej thiab txhua txoj haujlwm vuam. Nws yog qhov tshwj xeeb tshaj yog tsim rau vuam dub cov khoom siv hlau xws li carbon hlau, hlau alloy thiab stainless hlau.

2. Txhim kho cov pa roj carbon dioxide uas muaj zog tiv thaiv cov vuam yog cov thev naus laus zis tshiab tsim hauv xyoo 1950. Nyob rau ib nrab xyoo dhau los, nws tau tsim los ua ib qho tseem ceeb fusion welding txoj kev. Nws tau siv dav hauv kev lag luam tsheb, kev tsim kho tshuab tsim khoom, kev tsim nkoj, kev tsim khoom hauv tsev, kev tsim khoom tsim khoom, lub rhaub dej kub thiab lub nkoj tsim khoom, thiab tsim ntau yam qauv hlau thiab tshuab ua hlau. Cov pa roj carbon dioxide tiv thaiv vuam muaj qhov zoo ntawm kev siv vuam zoo, tus nqi qis thiab kev ua haujlwm yooj yim. Nws yog qhov kev txiav txim siab yav dhau los los hloov ntau phau ntawv arc vuam thiab submerged arc vuam. Thiab cov pa roj carbon dioxide tiv thaiv kev siv vuam yog qhov yooj yim kom paub NC vuam ntawm tus tswj lossis neeg hlau, uas yuav dhau los ua txoj hauv kev txuas tseem ceeb thaum ntxov xyoo pua 21st. Tam sim no, cov pa tiv thaiv uas siv hauv cov pa roj carbon dioxide tiv thaiv cov hlau txuas tau muab faib ua CO2 thiab CO2 + ar. Cov vuam siv siv feem ntau yog manganese silicon alloy vuam hlau, ultra-low carbon alloy welding hlau thiab flux cored vuam hlau. Cov ntsiab lus tseem ceeb ntawm cov hlau txuas yog: 0.5 ﹐ 0.8 ﹐ 0.9 ﹐ 1.0 ﹐ 1.2 ﹐ 1.6 ﹐ 2.0 ﹐ 2.5 ﹐ 3.0 ﹐ 4.0 etc. 4.0, thiab lwm yam.

3. Nta 3.1 tus nqi qis vuam. Cov pa roj carbon CO2 yog cov khoom tsim los ntawm cov tsev tsim khoom thiab cov tshuaj lom neeg, nrog rau qhov chaw dav thiab tus nqi qis. Nws tus nqi tsuas yog 40 ~ 50% ntawm qhov submerged arc vuam thiab phau ntawv arc vuam. 3.2 cov khoom lag luam siab, muaj zog nkag mus rau CO2 arc, loj melting qhov tob, siab melting tus nqi ntawm cov hlau vuam thiab ua kom nrawm nrawm. Nws cov khoom tsim tau yog 1 ~ 4 zaug ntawm kev siv arc vuam. 3.3 daim ntawv thov dav. Cov phaj nyias, phaj nruab nrab thiab txawm tias phaj tuab tuaj yeem txuas tau. Kev hloov pauv ntawm cov phaj nyias thaum siv vuam me me, thiab txhua txoj haujlwm vuam tuaj yeem nqa tawm. 3.4 muaj zog xeb tsis kam, cov ntsiab lus hydrogen tsawg hauv weld thiab tawg tau zoo. 3.5 tshem tawm slag tsis xav tau tom qab vuam. 3.6 vim yog qhib arc, nws yog ib qho yooj yim los saib xyuas thiab tswj thaum lub sij hawm vuam.

4. Cov khoom siv vuam CO2 4.1. Cov pa roj carbon CO2 4.1.1co2 cov khoom siv roj ntshiab CO2 roj tsis muaj xim thiab qaub me ntsis. Qhov ceev yog 1.97kg/m3, uas hnyav dua huab cua. Thaum cov pa roj carbon CO2 raug nias mus rau 5 ~ 7MPa ntawm chav sov, nws dhau los ua kua. Ua kua CO2 yog lub teeb nyob ntawm chav sov. Ntawm 0 ℃, 0.1MPa, 1kg kua CO2 tuaj yeem tsim 509l ntawm CO2 roj.

4.1.2 lub raj mis CO2 roj siv 40L tus qauv hlau lub tog raj kheej, uas tuaj yeem ntim nrog 25kg kua CO2, suav txog kwv yees li 80% ntawm lub tog raj kheej hlau, thiab seem 20% qhov chaw tau ntim nrog CO2 roj. Ntawm 0 ℃, siab siab yog 3.63mpa; Ntawm 20 ℃, qhov siab txaus siab yog 5.72mpa; Ntawm 30 ℃, qhov siab txaus yog 7.48 MPa. Yog li, CO2 lub tog raj kheej yuav tsum tiv thaiv los ntawm lub hnub lossis ze rau qhov cua sov kom tsis txhob tawg.

4.1.3 cuam tshuam ntawm CO2 roj kom huv ntawm kev ua haujlwm zoo