Waelz slag, to give its technical name, is composed mainly of silica but is also undesirably rich in poisonous metals like lead and zinc. Getting rid of it safely is thus a problem.
用专业术语来说是Waelz渣，它主要由硅酸盐组成，但同样富含不受欢迎的有毒金属物质例如铅锌，所以处理有毒金属就成了个问题。
Waelz slag, to give its technical name, is composed mainly of silica but is also undesirably rich in poisonous metals like lead and zinc. Getting rid of it safely is thus a problem.
用专业术语来说是Waelz渣，它主要由硅酸盐组成，但同样富含不受欢迎的有毒金属物质例如铅锌，所以处理有毒金属就成了个问题。
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