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首页> 外文期刊>Metallurgical and Materials Transactions >Calorimetric and Fourier Transform Infrared Spectrophotometric Studies of Potassium Elimination by Dunite
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Calorimetric and Fourier Transform Infrared Spectrophotometric Studies of Potassium Elimination by Dunite

机译：ite石消除钾的量热和傅里叶变换红外分光光度法研究

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This report contains the results of simultaneous and comparative differential thermal, then-no-gravimetric, and Fourier transform infrared Spectrophotometric studies of the interaction between K_2CO_3 and a mineral of dunite. The use of olivine during the reduction of iron oxides in the blast furnace is a common practice employed to increase the magnesium content of the slag and to eliminate alkaline elements, principally potassium. However, the use of dunite is less known and can have certain advantages over olivine. In this investigation, a dun-ite-coke-K_2CO_3 system was studied to simulate the operating conditions of a furnace in temperatures up to 1200℃. The results obtained show that the reaction begins with the dehydration of dunite and its transformation into forsterite and enstatite. This is followed by the fusion of potassium carbonate and, at temperatures between 1000℃ and 1200℃, a series of consecutive chemical reactions that includes the formation of potassium vapor and its reaction with enstatite and clinoenstatite, possibly via an intermediate phase in which unstable potassium iron silicates are produced. Ultimately, this leads to the formation of magnesium potassium silicate complexes. In the blast furnace, this silicate would be incorporated into the slag, taking with it the potassium brought in by the coke and iron ore of the load.
机译：该报告包含同时和比较差热，然后无重力和傅立叶变换红外分光光度法研究K_2CO_3与榴辉石矿物之间相互作用的结果。在高炉中还原铁氧化物的过程中使用橄榄石是增加矿渣中镁含量并消除碱性元素（主要是钾）的常用方法。但是，使用榴辉石鲜为人知，并且与橄榄石相比具有某些优势。在这项研究中，研究了dunite-cooke-K_2CO_3系统，以模拟炉子在最高1200℃的温度下的运行条件。所得结果表明，该反应始于菱锰矿的脱水并转变为镁橄榄石和顽辉石。随后是碳酸钾的熔融，在1000℃至1200℃之间的温度下，发生了一系列连续的化学反应，包括钾蒸汽的形成以及其与顽辉石和斜长辉石的反应，可能通过中间阶段，其中不稳定的钾产生硅酸铁。最终，这导致形成硅酸镁钾配合物。在高炉中，这种硅酸盐将掺入炉渣中，并带走了焦炭和铁矿石所带入的钾。

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