Attribute Definition

A grade is a measurement of metal content per mass of material. Commonly these measurements are percentages or grams per tonne, ounces per ton, pounds per ton and so on. Reconcilor supports up to any number of attributes (that is, tonnes, volume, grades, metal, other) in the system and these can be configured during implementation.

A grade has the following characteristics:

• Name of the grade
• Units of measure for the grade
• Number of decimal places to format the grade to

Grades can be configured as one of four types in Reconcilor:

• Normal – Most types of grade, generally metal/mass.
• Density – The measure of how dense the volume of material is. This is also used to convert volume into mass (tonnes).
• Moisture – The measure of water content in volume of material. This grade type is used for Wet to Dry conversions and mass balancing in the plant.
• Fluidity – Fluidity is a special type of grade the measures the viscosity of the material. The importance of this type is that to perform the mass average and report the grade it must use a different calculation. (Log10 on the conversion and Power10 on the expanded). To be available in a future version of Reconcilor.

When adding grades together, they must be weighed against all other grades with either mass or volume. This is referred to as a mass average or weighted average. The formula is as follows:

Sum of ([Grade] * [Tonnes]) / Sum Of ([Tonnes])