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RECYCLING SOLUTION FOR THE SINTERING OF PARTICULATE RESIDUES GENERATED IN BRAZILIAN STEELMAKING PLANTS

机译:在巴西炼钢厂产生的颗粒残留烧结烧结溶液的再循环溶液

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Steelmaking integrated plants are worldwide rated among the most polluting industries. Several types of their wastes such as the sludge from steel refining and rolling operation are recycled in the own plant. Other wastes, like the fine particles generated in the sintering stage are, however, usually disposed in open air piles and represent a burden to the environment. In the present work, the recycling of sintering particulate residues as addition into conventional clay ceramic was evaluated. Both technical and economical assessments are reported. The incorporation of this residue in amounts up to 20 wt% contributed to the workability of the precursor clay body by adjusting its excess of plasticity. The water absorption of the final residue added ceramic fired from 650 to 1050°C was enhanced owing to a decrease in porosity. In the case of Brazil, where most of the steelmaking plants as well as ceramic industries are located in the country’s southeast region, the residue incorporation is economically feasible. The cost of residue transportation and saving in clay, a non-renewable natural resource, has an advantageous margin over the cost of residue management, storage and landfill inside the plant.
机译:炼钢综合设备在全球范围内是最污染的行业。几种类型的废物如钢制精炼和轧制操作的污泥在自己的植物中再循环。然而,与在烧结阶段产生的细颗粒一样,其他废物通常在露天桩中设置并表示对环境的负担。在本作工作中,评价烧结颗粒残基作为常规粘土陶瓷的再循环。报告了技术和经济评估。该残余物的掺入量高达20wt%通过调节其过量的可塑性而导致前体粘土体的可加工性。由于孔隙率降低,增强了从650至1050℃的最终残余物添加的陶瓷的吸水率。就巴西的情况而言,大多数炼钢厂以及陶瓷工业位于该国的东南部地区,残留物融合在经济上是可行的。残留运输成本和粘土储蓄的成本,不可再生的自然资源,在工厂内的残留管理,储存和垃圾填埋场的成本上具有有利的余量。

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