活性炭吸附原子吸收光度法测定铅锑精矿中金的含量

Assay of Gold in Lead-Antimony Concentrate by Atomic Absorption Spectrophotometry with Activated Carbon Adsorption

通过在铅锑精矿焙烧时加入一定量的氧化锌或氧化钙,使铅锑精矿在灼烧过程中的单质硫、有机质、硫化物、碳充分焙烧,然后采用王水分解矿样,活性炭动态吸附富集金,灰化除碳,王水溶解,原子吸收光度法测定铅锑精矿中金含量,方法快速、准确,同时适用于含碳、硫较高焙烧时易结块的精矿样品。

The gold content in lead - antimony concentrate can be assayed by roasting the sample with a certain amount of zinc oxide or calcium oxide to make sulfur, organic matter, sulfide and carbon fully baked, decomposing the roasted sample with aqua regia and enriching gold by dynamic adsorption with activated carbon, then decarbonizing by ignition, dissolving the left in aqua regia and analyzing gold with atomic absorption spectrophotometry. This method is fast, accurate and can be applied to the concentrate samples of high carbon and sulfur and which is prone to caking in the process of roasting.