E = 10 Wᔹ (1/âPââ â 1/âFââ)E and Wᔹ: kWh/t; Fââ and Pââ: ”m.
Use when: Empirical Bond relation in its domain of application; Wᔹ depends on the ore and the test.
Grinding and mineral liberation
Link finesse, energy consumed and release of useful minerals.
What is happening?
Grinding continues the fragmentation of the ore, often in a ball or rod mill. In particular, it seeks to separate the grains of useful minerals from their matrix.
Increasing fineness generally increases the surface area created and can facilitate a reaction or separation. Excessive grinding, however, can consume too much energy and produce fines that are difficult to process.
The formulas, with their conditions.
Ănergie spĂ©cifique = puissance / dĂ©bit massiquePower: kW ; flow: t/h; result: kWh/t.
Use when: Average balance over a defined operating regime.
Where is this principle used?
Copper or gold concentrator
Prepare release before flotation or leaching.
Cement plant
Reduce the size of raw materials or clinker.
What to observe in the experiment
Compare moderate fineness and high fineness: interpret energy, flow and release objective together.
References and readings
This sheet explains the principles and their assumptions. Educational simulation can simplify the process; an industrial model requires suitable data and validation.
Have you understood the essentials?
Only one correct answer per question. Answer all three questions, then view the answer key.
Intu Lab · Understanding sheet · Kimba Christian