首页> 外文会议>TMS annual meeting >BENCH SCALE STUDY OF THE CHROMIUM AND NICKELRECOVERY FROM DUSTS AND SLUDGES GENERATED INSTAINLESS STEELMAKING
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BENCH SCALE STUDY OF THE CHROMIUM AND NICKELRECOVERY FROM DUSTS AND SLUDGES GENERATED INSTAINLESS STEELMAKING

机译:钢铁制造过程中产生的灰尘和污泥中铬和镍的回收的规模研究

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Currently Brazilian stainless steel production is around 350,000 tons per year(1). The stainlesssteel industrial generates several tons per year of dusts and sludges with high content of chromium,nickel, and iron. These wastes represent a problem to the stainless steel plants due totheir high amount of chromium, iron, and led that could be recovery in the ironmaking process.Beside wastes can cause a contamination to the environment where they are put. The solution tothese problems can be in the recycling of the dusts and sludges generated during stainless steelprocess.The characterization of these wastes was the first step of this study. Four wastes (one dust andthree sludges) were used in this work. Then the wastes were agglomerated in the briquette formto introduction in liquid steel in the melting experiments performed in the apparatus at threetemperatures 1570, 1600 and 1635°C. A bench-scale piece of equipment was used to melt thesteel and briquettes. Samples were withdrawn periodically of the bath to verify the chromiumbehavior with the time of the experiment. A high recovery of chromium was found and thetime required to this was about 15 minutes at 1600°C.
机译:目前,巴西的不锈钢产量约为每年35万吨(1)。不锈钢 钢铁工业每年产生几吨含铬量很高的粉尘和污泥, 镍和铁。这些废物对不锈钢厂来说是一个问题,原因是 它们的铬,铁和铅含量很高,可以在炼铁过程中回收。 废物旁边可能会对放置废物的环境造成污染。解决方案 这些问题可能在于对不锈钢制造过程中产生的灰尘和污泥的回收利用中。 过程。 这些废物的表征是这项研究的第一步。四种废物(一种灰尘和一种 三种污泥)用于这项工作。然后将废物以团块的形式团聚 在设备中进行的熔化实验中,将钢液引入到钢中的温度为3 温度为1570、1600和1635°C。使用台式规模的设备来熔化 钢和煤球。定期从水浴中取出样品以验证铬的含量 行为与实验时间的关系。发现铬的回收率很高,并且 为此所需的时间在1600℃下为约15分钟。

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