What is the importance of determining the work index?

‘Work Index’ is the amount of energy required to do this work. It is a measurement of how hard the rock is and an expression of the resistance that a material has to crusher.

What is the importance of the the bond work index in mineral processing?

Bond work index (Wi) can be considered as one of the most important affecting factors in the design of grinding systems which express on the value of energy (kwh) consumed per ton of the ground ore.

What is work index in unit operation?

The Bond work index is a parameter which represents a measure of an ore. resistance to grinding. Numerically, the work index represents the energy (kWh/sht) required to reduce the material of one short ton from a theoretically infinite feed size.

What is work index in size reduction?

‘Work Index’ is to measuring energy in size reduction what the ‘meter’ is to measuring distance. It is a standard measure that brings all size reduction circuits onto a common basis for comparison. It starts with Bond’s Work Index equation: W is the work (energy) input per ton.

What is size reduction statement?

SIZE REDUCTION Size reduction is the process of reducing the particle size of a substance to a finer state of subdivision to smaller pieces to coarse particles or to powder.

What is Bond Index in Limestone?

limestone : andesite = 25 : 75, limestone : andesite = 50 : 50, limestone : andesite = 75 : 25.

Is there a bond market index?

A bond index or bond market index is a method of measuring the investment performance and characteristics of the bond market. There are numerous indices of differing construction that are designed to measure the aggregate bond market and its various sectors (government, municipal, corporate, etc.)

What are the laws governing size reduction?

It may not be well known, but there are three physical laws that describe the energy required for size reduction. They are the Bond’s Law, Rittinger’s Law, and Kick’s Law. Rittinger’s Law — The energy required for reduction in particle size of a solid is directly proportional to the increase in surface area.

What are the advantages and disadvantages of size reduction?

Improved physical stability– In suspensions and emulsions, the rate of sedimentation decreases if the particles are of small and uniform size. Improvised rate of dissolution– When the surface area is larger, than the dissolution of a substance increases. Thus size reduction facilitates in increasing the surface area.

What is the importance of reducing the size of an ore?

Size reduction is important as it helps mineral processing methods with easier handling, an increased surface area per unit volume, as well as the separation of entrapped components.