Determination Of Gold And Silver Copper And Zinc In Ores And Uncertainty

Using the EDTA volumetric method, flame atomic absorption spectroscopy method for the assay of Taoyuan in polymetallic ore ore 150. The average grade of the mine: Au=2.80×10-6;Ag=223×10-6;Pb=3.59%;Zn=1.28%;Cu=0.56%。To meet the requirements for approval in the deposit industrial index in Liaoning Provincial Department of land and resources, the preliminary determination of Taoyuan Coal Mine has continued to develop.In order to ensure the accuracy of the test results, we carried out the internal sample inspection, accounting for 30% of the total number of samples. Send the samples to 30 other units for external inspection. Further to each element test methods for the uncertainty of discussion, finally get the gold, silver, copper, lead and zinc of expanded uncertainty, u?? u?? gug Aw?/09.0, ?w? ?? gug Agu?/063.0,?w? ?? ug Cuum L?/075.0, ?w? ?? gug Znu?/5.12, ?w? ?? gug Pbu?/3.17. The feasibility of analyzing the method of each element is obtained. The results of the analysis of the internal and external examination, the analysis of the data are true, and in line with the relevant analysis. According to the provisions of the Interim Provisions on the quality management of geological and mineral experiment testing, we can analyze the results as an important reference for the late work.Taoyuan polymetallic ore, has been developed for many years, the ore reserve content gradually decreased. In this case, Liaoning Tianbao Mining Co., Ltd. proposed old mines continued development requirements, my unit according to the relevant provisions, the geological exploration and drilling activity and ore samples for laboratory testing. Finally the above analysis results, also on the basis of the analysis of the test results, it is concluded that the grade of Taoyuan Coal Mine is better, quality is good, with continues to be developed.