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近日，國內第一條脆硫鉛銻礦“底吹+側吹+煙化”三連爐生產線，在河池市工業(yè)園區(qū)大任產業(yè)園生富冶煉有限責任公司投產運行。該生產線收集煙氣中99%以上二氧化硫制成硫酸，讓二氧化硫排放幾乎為零。
據(jù)了解，如何控制脆硫鉛銻礦冶煉低硫制酸，一直是困擾行業(yè)發(fā)展的最大難題。傳統(tǒng)工藝主要采用燒結鼓風爐冶煉，產生的二氧化硫濃度不到3%，生產硫酸則需濃度6%以上。使用大量石灰處理二氧化硫，不僅無法控制二氧化硫外排，而且還會產生新的硫酸鈣固廢。
據(jù)介紹，“氧氣底吹熔煉-側吹熔融還原-富氧揮發(fā)”三連富氧連續(xù)熔池熔煉工藝，是目前世界上先進的冶煉脆硫鉛銻礦和含銻廢渣工藝。該工藝成功運用于生產線，在國內尚屬首次，將對全國鉛銻冶煉行業(yè)發(fā)展起到很大推動作用。(記者/廖慶凌）
