Method for generating free lime content estimation model for steelmaking slag, method for estimating free lime content of steelmaking slag, method for managing shipment of steelmaking slag, and method for manufacturing iron and steel slag for road construction

A method for generating a free lime content estimation model for steelmaking slag for use in estimating a free lime content in steelmaking slag, the method comprising:

• a first acquisition step of irradiating the steelmaking slag with a laser to convert a portion of a surface of the steelmaking slag into plasma and acquiring an emission spectrum from the plasma;
• a second acquisition step of acquiring an actual free lime content of the steelmaking slag whose emission spectrum has been acquired in the first acquisition step;
• and
• a model generation step of acquiring multiple datasets each comprising pairs of the emission spectrum acquired in the first acquisition step and the actual free lime content acquired in the second acquisition step, and, based on these datasets, generating a free lime content estimation model using intensities of an emission spectrum including peaks caused by emission lines in Ca, Fe, and Si, within the emission spectrum acquired in the first acquisition step, as input, and using the actual free lime content acquired in the second acquisition step as output.