Roasting materials containing roastable sulfur with arsenic and/or antimony
    1.
    发明授权
    Roasting materials containing roastable sulfur with arsenic and/or antimony 失效
    含有硫酸和/或抗氧化剂的可转移硫磺的材料

    公开(公告)号:US3656933A

    公开(公告)日:1972-04-18

    申请号:US3656933D

    申请日:1969-06-03

    Applicant: BASF AG

    CPC classification number: C22B1/10 C01B17/52

    Abstract: A fluidized-bed method of roasting sulfidic materials containing arsenic and/or antimony with a gas containing oxygen with separate supply of the gas containing oxygen for the preroasting in a first stage and for the afterroasting in the second stage and with separate withdrawal of the roaster gas from the preroasting stage and from the afterroasting stage. The dusty portion of the roasted intermediate product from the first stage is introduced periodically into the fluidized bed of the second stage and, in timed relationship with this periodic introduction of the roasted intermediate product, air is periodically introduced into the gas space above the fluidized bed in the second layer in such an amount that it is adequate for complete roasting of the dusty roasted intermediate products suspended in this gas space.

    Abstract translation: 一种流化床方法,其将含有砷和/或锑的硫化物料与含氧气体分开供应含有氧气的气体,用于在第一阶段中进行预先煅烧,并在第二阶段中进行后处理,并单独抽出焙烧炉 来自前期阶段和后期阶段的气体。 来自第一阶段的焙烧中间产物的多尘部分周期性地引入第二阶段的流化床,并且与定期引入焙烧的中间产物的定时关系定期地将空气引入流化床上方的气体空间 在第二层中,其量足以完全焙烧悬浮在该气体空间中的多尘的中间产物。

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