STUDY OF THE MINERALIZING EFFECT OF CRYOLITE AND ITS INFLUENCE ON THE PROCESSES OF CLINKER FORMATION

Bulletin of Belgorod State Technological University named after. V. G. Shukhov Pub Date : 2023-09-21 DOI:10.34031/2071-7318-2023-8-11-82-92

A. Novosyolov, Yu. Dreer, I. Novoselova, Y. Vasina

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Abstract

The article discusses the possibility of using cryolite Na3AlF6, the main fluorine-containing compound of a man-made product of electrolytic aluminum production, as a mineralizing additive when burning clinker. A comparative assessment of the effectiveness of cryolite Na3AlF6, as a mineralizer, and calcium fluoride CaF2, a substance that has the most effective mineralizing effect, is provided. The influence of mineralizer additives on the processes of dissociation of calcium carbonate, assimilation of free calcium oxide with the formation of silicates, aluminates and calcium ferrites, liquid-phase sintering and clinker formation with the synthesis of basic clinker minerals is considered. The physical and chemical processes that occur when heating raw material mixtures without additives and with the addition of mineralizers – CaF2 and Na3AlF6 – to a clinker sintering temperature of 1450ºC are examined in detail. The dynamics of changes in the qualitative phase composition of firing products at various temperatures, ranging from 700ºC to the clinker sintering temperature of 1450ºC, as well as a quantitative characteristic of the intensity of formation of the main clinker minerals are presented. It has been determined that cryolite has a mineralizing effect and can be used as a mineralizer when burning clinker. The effectiveness of cryolite is comparable to the effectiveness of calcium fluoride, and the burning temperature of clinker can be reduced to 1400ºC

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研究冰晶石的矿化作用及其对熟料形成过程的影响

文章讨论了在焚烧熟料时使用冰晶石 Na3AlF6（一种电解铝生产人造产品的主要含氟化合物）作为矿化添加剂的可能性。对冰晶石 Na3AlF6 作为矿化剂与氟化钙 CaF2（一种矿化效果最好的物质）的效果进行了比较评估。研究考虑了矿化剂添加剂对碳酸钙解离、游离氧化钙同化形成硅酸盐、铝酸盐和钙铁氧体、液相烧结和熟料形成以及基本熟料矿物合成等过程的影响。详细研究了将不含添加剂和添加矿化剂（CaF2 和 Na3AlF6）的原料混合物加热至 1450ºC 熟料烧结温度时发生的物理和化学过程。报告介绍了从 700ºC 到熟料烧结温度 1450ºC 的不同温度下烧结产品的质相组成的动态变化，以及主要熟料矿物形成强度的定量特征。结果表明，冰晶石具有矿化作用，可在烧制熟料时用作矿化剂。冰晶石的效果与氟化钙的效果相当，熟料的烧成温度可降至 1400ºC

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Bulletin of Belgorod State Technological University named after. V. G. Shukhov

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