Txhawm rau kom txuag dej, tiv thaiv cov plua plav thiab dej paug, thiab txuag kev nqis peev hauv cov khoom siv dej phwj tuaj, cov khoom siv hluav taws xob qhuav rau kev ua cov calcium carbide rauv tau tsim los ntawm lig 1950s mus rau thaum ntxov 1970s.
Nyob rau hauv cov txheej txheem qhuav purification, lub cub tawg plua plav tom qab qhov cub hluav taws xob pom muaj txog 1000ppm cyanide, uas tuaj yeem ncaj qha tshem tawm cov pa phem ntawm ib puag ncig. Txhawm rau tiv thaiv kev ua qias tuaj ib puag ncig, thaum tsim kev ua kom huv si qhuav, lub tshuab ziab khaub ncaws plua plav incineration yog tsim, uas tuaj yeem kho cov organic teeb meem thiab cyanide nyob rau hauv lub cub tawg plua plav, kom cov cyanide tsawg dua 50ppm, yog li tsim ib qho kev lag luam calcium. carbide furnace gas qhuav purification, thiab maj mam tau txais kev paub txog kev lag luam. Ib qho kev paub tab qhuav qhuav purification tshuab ntawm calcium carbide rauv tau maj mam tsim thiab tau siv rau ntau yam calcium carbide ua thiab cov khoom siv ntau lawm. Yog li ntawd, vim nws cov nqi calorific siab thiab lub zog loj, kev rov qab los ntawm calcium carbide rauv tail gas yog ib qho tseem ceeb txuas ntawm lub zog-txuag tshuab hauv calcium carbide ntau lawm. Vim tias lub qhov cub hluav taws xob sab hauv tsis tuaj yeem rov qab tau cov pa roj, nws tseem ceeb heev kom hloov nws mus rau hauv qhov cub calcium carbide kaw.
