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Question:

What is "LOI" in the casting material?

What is "LOI" in the casting material?

Answer:

According to the analysis of the special methods of chemical composition of refractory raw materials, international and national standards in the regulations, methods of chemical analysis this year towards faster analysis and improve the accuracy of the analysis the direction of development, such as complex titration, colorimetric analysis, flame photometry, spectral analysis and X ray fluorescence analysisWhat does "LOI" mean? LOI stands for extreme oxygen index". It is a direct indicator of the self extinguishing capacity of a fiber (or mixture). The greater the value, the stronger the flame retardancy of the fiber or fabric.
According to the components obtained by chemical analysis, the purity of raw materials can be judged, and the fire resistance is calculated. The mineral composition can be roughly calculated by means of the relevant phase diagrams.
Burning loss (LOI, Loss, on, ignition)In the analysis of refractory materials, in addition to the main component content of oxides and minor components, usually also determine the LOI (Loss on ignition, abbreviated as LOI), coming in at 105 - 110 DEG C dried raw materials in weight percentage of 1000 and 1100 C after burning lost. The analysis of the loss of raw materials has its special significance. It characterizes the amount of gaseous products (such as H2O, CO2, etc.) and organic matter content in which the feedstock is heated and decomposes, so that it is possible to determine whether the raw material is calcined in advance and the volume of the material is stable.

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