Study on Clinker Production Using Magnesium Slag on a 4500tpd Line

Abstract

Magnesium slag was used to produce cement clinker replacing part of limestone and sandstone with 11% content. The results show that the magnesium slag can significantly improve the grindability and burnability of Portland cement raw materials. The 28d compressive strength of this clinker is 58.9MPa and the physical performance can satisfied the requirements of 52.5 strength grade according to GB 175-2007.

Effect of Thermal Activation on the Mineralogical Structure of Magnesium Slag

“…According to the literature, the C2S rate in the magnesium slag is expected to be around 60% due to self-cooling, and the C3S rate is expected to be 0-10% [4,9]. After the cooling process, mineralogical studies were started on the products obtained.…”

“…The Bogue Method fails to consider the incorporation of foreign ions into the structures or forming different solid solutions. Previous research has indicated that the Bogue calculation typically underestimates the alite content and overestimates the oxide content compared to quantification by point counting and optical microscopy techniques [4,15]. Quantitative X-ray diffraction techniques (QXRD) can yield results comparable to quantitative optical microscopy for alite and belite phases.…”

“…However, scientific studies have yet to be able to take these wastes beyond the use of additives in cement production. Some reflections on the subject have revealed that magnesium production slag's (MPS) chemical and mineralogical structure is similar to Portland cement clinker but has shown that the C3S phases are lower and the C2S phases are higher than the clinker [4][5].…”

Synthesis of a novel slow-release potassium fertilizer from modified Pidgeon magnesium slag by potassium carbonate

“…Considering the sustainable development of the metallic magnesium industry, it is important to find an effective approach for the disposal of large quantities of PMS. Due to its high content of CaO and SiO 2 , PMS has previously been mainly used for building materials (Oliverira et al, 2004;Djokic et al, 2012a;Wang et al, 2011;Lu et al, 2013). In recent years, new ways of reusing PMS have been reported: researchers have used PMS as a heterogeneous solid catalyst of MgO-CaO/ Al 2 O 3 , enabling the transesterification of vegetable oils to biodiesel (Elihann et al, 2012;Kwon et al, 2012;Zhang and Huang, 2011); based on alkali-activated and ion-exchange reactions, Zhang et al synthesized a novel photocatalyst derived from PMS ; Fan et al investigated the characteristics of PMS and the feasibility of PMS as a desulfurizer (Fan et al, 2012); Tian et al published a study describing that the calcium hexaluminate/anorthite ceramic was prepared by magnesium slag, kaolin, and industrial alumina at different sintering temperatures (Tian et al, 2013); and Liang et al reported that PMS as raw materials was applied to prepare silicon fertilizer by acid leaching and roasting with additives .…”