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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||75/1019 ; 75/693|
|발명자 / 주소||
|출원인 / 주소||
|인용정보||피인용 횟수 : 29 인용 특허 : 0|
Lead-contaminated soil and battery casings are remediated using a plasma arc furnace which pyrolyzes the soil and waste battery casings so as to form a vitrified slag and a combustible gas, respectively. The combustible gas along with volatilized lead (and other heavy metals which may be present) are transferred to, and used as a primary fuel by, a conventional smelting furnace. The volatilized lead that is entrained in the combustible gas is thus transferred to the recovery and environmental protection/control equipment associated with the smelting furn...
A process for the remediation of lead-contaminated soil and waste lead-acid battery casings comprising the steps of: (a) feeding a mixture of lead-contaminated soil and waste lead-acid battery casings into a plasma arc furnace; (b) pyrolyzing the mixture in the plasma arc furnace by bringing the mixture into contact with a plasma arc torch at a temperature between about 4,000°to about 8,000°C. for a time sufficient to (i) convert the battery casings into a combustible gas, (ii) volatilize substantially all lead contaminants which are present in said mixt...