Method for mineral comminution energy determination and intelligent liberation degree identification based on morphological characteristics of particles

A method for mineral comminution energy determination and intelligent liberation degree identification based on morphological characteristics of particles, comprising following steps:

• a, comminuting a magnetite ore sample with a drop weight impact testing machine to obtain communuted ore particles, and sieving the comminuted ore particles for particle size classification to obtain a plurality of classes of classified particles;
• b, using a mineral liberation analyzer to measure and record mineral liberation degrees of particles with a first size class in the classified particles;
• c, adjusting impact comminution energy of the drop weight impact testing machine and iterating the steps a and b for a plurality of times;
• d, establishing a profile of magnetite liberation degrees at different levels of comminution energy and a profile of quartz liberation degrees at different levels of comminution energy;
• e, performing analysis based on the profile of magnetite liberation degrees and the profile of quartz liberation degrees obtained in the step d to determine an appropriate comminution energy E for the classified particles with a particle size class of A, wherein the appropriate comminution energy E is the comminution energy that the classified particles with the particle size class of A have highest liberation degrees;
• f, comminuting the magnetite ore sample with an actual comminution energy of the appropriate comminution energy E, and scanning, by an electron microscope, the plurality of classes of classified particles to obtain proportions of intergranular fractures in particle fractures ;
• g, calculating a theoretical comminution energy E1 corresponding to each class of the classified particles according to a function relationship between the proportions of intergranular fractures and the theoretical comminution energy of each class of the classified particles;
• and
• h, comparing the calculated theoretical comminution energy with the actual comminution energy to obtain an error for each class of the classified particles;
• determining that the calculated theoretical communition energy E1 of the classified particles with a particle size class of B corresponding to the error less than a preset value is the actual comminution energy, and determining that the proportions of intergranular fractures of the classified particles with the particle size class of B are capable of being used to determine the actual comminution energy for the magnetite ore sample.