The chemical composition of lead concentrate shall meet the requirements in the table below. The lead concentrate is divided into 7 grades according to chemical composition, calculated by dry ore grade, and its composition (yb113-82) is shown in the table below. [1]
(1) Gold, silver and bismuth in lead concentrate are valuable elements, and the analysis data should be reported;
(2) Two impurities of MgO and Al2O3 in the concentrate are taken as reference indexes, but not as delivery basis temporarily.
The moisture content in the concentrate shall not be more than 12%. In winter, the moisture content of concentrate is no more than 8%. Foreign inclusions shall not be mixed in the concentrate.
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