Operating rates across licensed smelters of secondary lead in Jiangsu, Anhui, Henan and Guizhou averaged 55.5% in the week ended September 18, down 3 percentage points from the previous week, showed an SMM survey. Secondary lead capacity in Guizhou increased from 592,000 mt to 622,000 mt as Guizhou Yongxin added a new production line, lifting the total capacity in the four provinces from 3.28 million mt to 3.31 million mt.