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 the main steel-making processes.Andthe filter bags contained fiber glass
filters, blast-furnace polyester filters, converter polyester filters, acrylic filters and Metamax filters, which were the main filter types and widely employed in the
world