On the Influence of Additions on the Sintering and Dead-burning of Sea-water Magnesia. Studies on the Dead-burned Sea-water Magnesia, I

The purpose of this investigation is to study the effects of various impurities which might be present in sea-water magnesia on the sintering and dead-burning properties.The influence of CaO, SiO2, Al2O3, Fe2O3 etc. additions on the sintering and dead-burning of magnesia has been investigated. The results obtained are shown as follows;(1) The sintering of dead-burned magnesia is influenced greatly by molar ratio of CaO/SiO2 and CaO/Fe2O3, (2) and the suggestion is made that the effect of additions in promoting the sintering of sea-water magnesia may be related to the chemical composition of the original sea-water magnesia.(3) The relation between the sintering characteristics of magnesia and molar ratio CaO/SiO2, CaO/Fe2O3, and CaO/Al2O3 was made clear.(4) There is no obvious relationship between the densification of dead-burned magnesia and the promoting growth of periclase crystals.(5) An optimum addition of additives beyond which sintering is inhibited was determined from the study of mineral composition of products.