The waste filter bagsamples were collected from different production processes in a steel plant located in Shaoguan City,Guangdong Province,which was
one of China's major steel plants and representatively.The production procedures
were the blast furnace,converter,electric furnace and coke oven operation,
including themainsteel-makingprocesses.Andthe filter bagscontained fiberglass
filters, blast-furnacepolyester filters, converterpolyester filters, acrylic filters and
Metamax filters, whichwerethemain filter typesandwidelyemployedinthe
world