ITEM VALUE CONTENT OF LEAD TETROXIDE（Pb3O4) ≥97% CONTENT OF LEAD METAL（Pb） ≤0.10% CONTENT OF IRON SESQUIOXIDE（Fe2O3） ≤0.005% SIZE 2.0 ~ 1.7mm ≤2.0% 1.7 ~ 0.8mm ≥95.0% 0.8mm ~ 0 ≤3.0%