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机械化学反应指由机械力引起的反应。近来发现固态机械化学反应可以通过在一个高能球磨机中研磨反应物而发生,这是一种称为机械磨矿的方法。机械磨矿过程中,在室温条件下会产生氧化/还原反应。这引出了一个新的设想——或许在室温条件下,采用机械化学处理方法可以精炼金属矿石。研究发现,高能球磨机可以对黄铁矿(FeS_2)进行机械化学处理。黄铁矿是金的最普通的硫化基质,在难选黄铁矿试样中,金被包裹于黄铁矿基质中。因此,这层基质在氰化前必须先破坏。X射线衍射,Mossbauer光谱学和热力分析发现,黄铁矿可以通过机械化学方法处理,硫以硫酸盐形式存在,不产生二氧化硫气体。此过程中势能的存在为处理难选含金黄铁矿矿石提供了良好的经济活力和在环保上可接受的处理工艺环境。
Mechanochemical reaction refers to the reaction caused by mechanical force. It has recently been discovered that solid state mechanochemical reactions can occur by milling reactants in a high energy ball mill, a process known as mechanical grinding. Mechanical grinding process, at room temperature will produce oxidation / reduction reaction. This leads to a new concept - perhaps using mechanochemical treatment at room temperature to refine metal ores. The study found that high-energy ball mill can pyrite (FeS_2) mechanochemical treatment. Pyrite is the most common sulfidation matrix for gold, and in the refractory pyrite samples gold is encapsulated in a pyrite matrix. Therefore, this matrix must be destroyed before cyaniding. X-ray diffraction, Mossbauer spectroscopy and thermodynamic analysis revealed that pyrite can be treated by mechanochemical methods and that sulfur is present in the sulphate form, producing no sulfur dioxide gas. The presence of potential energy in this process provides a good economic viability for the treatment of refractory gold-containing pyrite ores and an environmentally acceptable process environment.