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过去在分析化学上,磷酸的应用较少,同时我们对于磷酸在高温下的性质也不够了解。这一次为了配合祖国的经济建设,我们第一次把磷酸应用于铬铁矿的分析方面。大家都知道,铬铁矿矿物种类的鑑定,直接关系着铬铁矿的选矿及冶炼等问题,而铬铁矿的鑑定,要求正确地测定其中亚铁的含量。以往一般用于测定岩石和矿物中亚铁的方法,对于铬铁矿来说都很难适用。为了解决铬铁矿的分析问题,作者等创用了磷酸法。这样不但解决了铬铁矿中亚铁的测定问题,同时也解决了:(1)铬铁矿中亚铁与铬、全铁与铬及亚铁、全铁与铬的连续测定;(2)其他矿物如钛铁矿、钶铁矿、褐簾石及磁铁矿等中亚铁的测定;(3)十数种元素,例如钨、钼、锰、铬及镍等在野外的简便定性法;(4)铁矿石中亚铁与全铁的连续测定。
In the past, analytical chemistry used less phosphoric acid and we did not know enough about the nature of phosphoric acid at high temperatures. This time in order to meet the economic development of the motherland, we first applied phosphoric acid to the analysis of chromite. As we all know, the identification of chromite mineral species is directly related to the chromite ore dressing and smelting issues, and the identification of chromite, which requires the correct determination of the ferrous content. In the past generally used for determination of rock and mineral ferrous method, for chromite are difficult to apply. In order to solve the problem of chromite analysis, the author used the phosphoric acid method. This not only solved the determination of ferrous iron in chromite, but also solved: (1) chromite in the ferrous and chromium, ferroalloy and chromium and ferrous, ferroalloy and chromium continuous determination; (2) Determination of other ferrous minerals such as ilmenite, columbite, polish and magnetite; (3) the simple and convenient method of determining the ten elements such as tungsten, molybdenum, manganese, chromium and nickel in the field; (4) Continuous determination of ferrous and total ferrous iron ores.