What is loss on ignition in fly ash?

What is loss on ignition in fly ash?

For example, the loss on ignition of fly ash consists of contaminant unburnt fuel. In pyroprocessing industries such as lime, calcined bauxite, refractories or cement manufacture, the loss on ignition of the raw material is roughly equivalent to the loss in mass that it will undergo in a kiln.

How do you calculate ignition loss?

Determine % loss on ignition by dividing “initial loss” by initial weight of sample and multiply by 100.

How do you reduce LOI in fly ash?

For lower LOI ashes, an auxiliary fuel such as petroleum or natural gas is used to provide combustion energy; this method has the disadvantages of added cost and of producing additional combustion by-products which are themselves the subject of environmental concern.

What does high loss on ignition mean?

Loss on ignition describes the process of measuring the weight change of a sample after it has been heated to high temperature causing some of its content to burn or to volatilise.

What does LOI measure?

Loss on ignition (LOI) is one of the most widely used methods for measuring organic matter content in soils but does not have a universal standard protocol. A large number of factors may influence its accuracy, such as furnace type, sample mass, duration and temperature of ignition and clay content of samples.

What is LOI in kiln?

Loss on IgnitionRM, uncalcined). The loss on ignition of the kiln feed (LOIkiln feed) can be used instead of LOIRM, as long as the dust return is not significantly calcined (degree of calcination: d<5%) and contributes with less than 20% to the amount of kiln feed.

What is the formula of weight loss on ignition for soil?

The LOI calibration equation was %C (combustion) = 0.03 + 0.36 x %weight loss by LOI, adj.

Is loss on ignition same as organic matter?

Loss on Ignition measures the weight of a dried soil before and after burning away its organic matter. Different types of organic matter burn at different temperatures, but most organic matter burns away at 375oC.

Why is Loi important for fly ash?

The dosage of air entraining agents (AEA) in concretes containing fly ash is also affected by carbon content. Loss on ignition (LOI) test is a generally accepted method for estimating the unburned carbon content of fly ash.

Why is loss on ignition important?

The percentage weight lost on ignition gives a crude measure of the organic content of the sediment. Generally, percentage loss on ignition values show an inverse relationship with percentage dry weight values.

What is loss on ignition value?

What is clinker factor?

Clinker. An intermediate product in cement manufacturing produced by decarbonizing, sintering, and fast- cooling ground limestone. Clinker factor. The percentage of clinker in cement (according to the WBCSD-CSI Cement CO2 and Energy Protocol).

What is loss on ignition in ceramics?

Loss on Ignition is a number that appears on the data sheets of ceramic materials. It refers to the amount of weight the material loses as it decomposes to release water vapor and various gases during firing.

What is Loi soil test?

What is the ignition temperature in the determination of soil organic matter by loss on ignition?

PHYSIO CHEM: OM (LOI), Org. C (LOI) This method estimates soil organic matter based on gravimetric weight change associated with high temperature oxidation of organic matter. After initial oven drying at 105ºC, the samples are ignited in a muffle furnace for 2 hours at 360ºC.

What is the difference between loss on ignition and residue on ignition?

The loss on ignition (LOI) is expressed as a weight percentage of the dry mass. The mass remaining after heating a sample under specified conditions. The residue on ignition is related to the dry mass and expressed in percentage. The mass of sample obtained after the specified drying process.

What is LOI in Catalyst?

The Loss on Ignition (LOI) is an important analytical parameter in the assay of petrochemical catalysts. Loss on ignition with specified ignition temperature and time is done for fresh, regenerated, used, and spent catalysts, catalyst supports, and molecular sieves of various shapes and sizes, including fines.