What is burn reduction 20 and what is burn reduction

Ignition reduction is also known as loss on ignition, referred to as ignition reduction. The rock sample is burned to constant weight at 1000, and the reduced mass is called the burn reduction.

During the burning process, volatile substances are removed including carbon dioxide, combined water, and small amounts of sulfur, fluorine, chlorine, and organic matter. The loss of volatile components is closely related to the burning time of temperature. Changes in the mass of the specimen should be seen as the algebraic sum of the mass increases or decreases in the mass of various chemical reactions.

When calculating the percentage sum, if the results of the burn reduction are used in the calculation, the change in the composition of each component in the sample after ignition should be converted.

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Loi loss on ignitionIn the analysis of refractories, in addition to the content of principal oxides and by-components, the loss on ignition (abbreviated as loi) is usually determined, that is, the percentage of weight lost after the raw material dried at 105-110 is burned at 1000-1100. The analysis of loss on ignition of raw materials has its special significance. It characterizes the gaseous products (such as H2O, CO2, etc.) and organic matter content of the pyrolysis of raw materials, so that it can be judged whether the raw materials need to be calcined in advance when they are used, so that the volume of raw materials is stable.

According to the composition obtained from chemical analysis, the purity of the raw material can be judged, its fire resistance can be roughly calculated, and its mineral composition can also be roughly calculated with the help of the relevant phase diagram.

The chemical composition analysis of refractory raw materials is carried out according to special methods, which are stipulated in international standards and national standards, and chemical analysis methods have been developing in the direction of accelerating the analysis speed and improving the accuracy of analysis this year, such as complex titration, colorimetric analysis, flame photometry, spectroscopic analysis and X-ray fluorescence analysis.

Also known as loss on ignition.

Abbreviated as burning. The rock sample is burned to constant weight at 1000, and the reduced mass is called the burn reduction.

Ignition reduction, also known as loss on ignition, refers to the loss of crystal water discharged from the blank during the firing process, CO2 decomposed from carbonate, SO2 decomposed from sulfate, and the amount of matter after organic impurities are removed. Comparatively speaking, if the amount of ignition is large and the flux content is excessive, the shrinkage rate of the product with high firing will be greater. It is also easy to cause deformation, defects, etc.

Therefore, it is required that the burning reduction of porcelain blanks is generally less than 8%. There are no strict requirements for pottery, but they should also be properly controlled to keep the shape of the product consistent.