铜精矿取制样及储存过程中铜含量变化研究

Research on the Change of Copper Content in the Process of Sampling, Sample Preparation and Storage of Copper Concentrate

本文用智利、加拿大和秘鲁三个矿山中的九个样品,针对铜精矿取样、制样及储存过程中铜含量的变化情况进行研究。结果表明,在样品取样试验和水分干燥试验中,未发现样品中的铜含量发生氧化,而在样品研磨试验和样品储存试验中,部分样品中的铜含量发生了变化,原因可能是这些样品中的铜与硫发生了氧化反应。通过本实验数据的分析找出铜精矿氧化的可能因素,氧气、水、温度、时间都是必要条件,而硫含量越高,发生氧化的趋势越明显。将这些分析结果应用于铜精矿的检验和贸易中,能更准确地反应铜精矿中计价元素的真实含量,减少贸易双方检验数据偏差以及贸易双方的争议。

This article collected nine samples from three mines in Chile, Canada and Peru to study the changes in copper content during sampling, sample preparation and storage of copper concentrate. In the sample sampling test and the moisture drying test, the copper content in the sample was not oxidized, but in the sample grinding test and the sample storage test, the copper content in some samples changed, possibly due to the sulfur content in these samples.Through the analysis of the experimental data, the oxidation factors of copper concentrate is found out, oxygen, water, temperature and time are all necessary conditions, and the higher the sulfur content, the more obvious the tendency of oxidation occurs. These rules are applied to the inspection and trade of copper concentrate, and the true content of the denominated elements in copper concentrate is more accurately reflected, and the deviation of trade data and trade between the two parties are reduced.