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Electrostatic painting residues as an alternative raw material for red clay industry

机译:静电涂料残留物可作为红土行业的替代原料

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摘要

In this study, the viability of using electrostatic painting residues -- paint sludge -- as a raw material to the red clay industry was investigated. Red clay-based ceramic masses containing electrostatic paint residues were formulated during the study. The clays were obtained from the Rio do Rastro deposit, in Gravataf, and were of the standard formulation used in industry. Different ceramic mass formulations with additions of 0.5, 1.0, 2.5 and 5.0 wt. percent electrostatic painting residue in addition to a formulation with no residue addition (standard formulation), were evaluated. The samples were uniaxially pressed in a double-effect press and were fired in an electric oven at 900, 950 and 1000 deg C. The firing at constant temperature lasted 8 h, and heating rate was 150 Kh~(-1). After processing the samples were characterized in terms of their physical and mechanical properties. Environmental compatibility was also considered by the evaluation of gaseous emissions and leaching and solubilization tests according to the Brazilian standards NBR 10.005 and NBR 10.006, respectively. The results showed that it was possible to produce ceramic materials containing electrostatic painting residues within their formulations.
机译:在这项研究中,研究了使用静电涂料残留物(油漆污泥)作为红土行业原料的可行性。在研究过程中配制了含有静电涂料残留物的红粘土基陶瓷块。粘土是从Gravataf的Rio do Rastro矿床获得的,具有工业上使用的标准配方。添加0.5、1.0、2.5和5.0重量%的不同陶瓷质量配方。除了没有添加残留物的配方(标准配方)外,还评估了静电涂料残留物的百分比。将样品在双效压机中单轴压制,并在900、950和1000摄氏度的电烤箱中烧制。恒温烧制持续8小时,加热速率为150 Kh〜(-1)。加工后,根据样品的物理和机械性能对其进行表征。分别根据巴西标准NBR 10.005和NBR 10.006评估气体排放以及浸出和增溶测试也考虑了环境相容性。结果表明,可以生产在配方中含有静电喷漆残留物的陶瓷材料。

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