Daim ntawv thov ntawm cov raj tooj liab yog qhov dav ntau dua li cov hlau ntshiab. Txhua xyoo, 50% ntawm tooj liab yog electrolytically purified rau hauv cov tooj liab ntshiab siv rau hauv kev lag luam hluav taws xob. Cov tooj liab hais ntawm no yuav tsum yog cov ntshiab heev, nrog rau cov ntsiab lus tooj liab ntau dua 99.95%. Ib qho me me ntawm impurities, tshwj xeeb tshaj yog phosphorus, arsenic, txhuas, thiab lwm yam, yuav txo tau qhov conductivity ntawm tooj liab. Cov ntsiab lus ntawm cov pa oxygen hauv tooj liab (me me ntawm cov pa oxygen yooj yim sib xyaw thaum lub sij hawm tooj liab smelting) muaj kev cuam tshuam zoo rau kev ua haujlwm. Tooj liab siv hauv kev lag luam hluav taws xob feem ntau yuav tsum yog tooj liab tsis muaj oxygen. Tsis tas li ntawd, impurities xws li txhuas, antimony, thiab bismuth yuav tiv thaiv cov crystals ntawm tooj liab los ntawm kev sib xyaw ua ke, ua rau kub brittleness, thiab tseem yuav cuam tshuam rau kev ua cov tooj liab ntshiab. Cov tooj liab ntshiab uas muaj purity siab yog feem ntau refined los ntawm electrolysis: impure tooj liab (piv txwv li tooj liab crude) yog siv raws li anode, ntshiab tooj liab yog siv raws li cathode, thiab tooj liab sulfate tov yog siv raws li cov electrolyte. Thaum qhov tam sim no dhau mus, cov tooj liab tsis huv ntawm lub anode maj mam yaj, thiab cov tooj liab ntshiab maj mam precipitates ntawm cathode. Cov tooj liab ua kom zoo li no tuaj yeem ncav cuag purity ntawm 99.99%. Tooj liab yog ib hom tooj liab uas ntshiab. Feem ntau nws tuaj yeem suav tias yog tooj liab ntshiab. Nws muaj zoo conductivity thiab plasticity, tab sis tsis muaj zog thiab hardness.
Copper tube welding
Copper tube vuam feem ntau siv 50%, 45%, 35% lossis 25% nyiaj vuam rods, txhua yam yuav tsum muaj kev ua haujlwm zoo thiab kev pab cuam ntawm flux. Cov flux siv yuav tsum yog ib qho yooj yim sib tov los yog hmoov.
Copper tube welding siv cov nplaim hluav taws kub. Cov txheej txheem welding yog:
(1) Ua ntej cua sov, siv cov flux rau qhov yuav tsum tau welded.
(2) Thaum tshav kub kub thiab ntxig rau lub raj tooj liab thiab lub tes tsho, thiab txav cov nplaim taws rov qab los ntawm ob lub ntsiab lus tsis tu ncua. Tsis txhob cia cov nplaim taws ncaj qha mus rau lub flux. Qhov kub thiab txias thaum cua sov lub raj hlau yog me ntsis siab dua li thaum cua sov lub raj tooj liab.
(3) Thaum lub raj tooj liab tau rhuab thiab cov flux melts mus rau hauv cov kua, tam sim ntawd tso lub preheated vuam pas nrig rau ntawm qhov chaw vuam. Thaum lub vuam pas nrig pib yaj, txav cov nplaim taws rov qab los ntawm ob lub ntsiab lus kom txog thaum lub vuam ntws mus rau hauv qhov sib txawv ntawm ob lub raj.
(4) Tshem tawm cov nplaim hluav taws thiab cia lub solder hu rau qhov chaw vuam rau ob peb feeb ua ntej tshem nws. Yog tias koj xav tias lossis pom tias tseem muaj qhov chaw nruab nrab ntawm ob lub raj, koj tuaj yeem ua kom sov dua thiab txav cov nplaim taws tsis tu ncua ntawm ob lub ntsiab lus. Yog tias tsim nyog, ntxiv me me ntawm solder.
