The utility model discloses an energy-saving variable-frequency speed regulation
ball mill for realizing narrow-fraction ore
grinding, and belongs to the technical field of ball mills. The output end of the cylinder body is provided with an ore
discharge chute, the surface of the ore
discharge chute is provided with a grading chute, the bottom of the grading chute is provided with a demagnetizing
elbow, the output end of the demagnetizing
elbow is provided with a fine-fraction electronic scale, and one side of the fine-fraction electronic scale is provided with a coarse-fraction electronic scale; and
recovery chutes are arranged at the output ends of the coarse-fraction electronic scale and the fine-fraction electronic scale. According to the utility model, after the ore
discharge chute and the grading chute are used for sampling at regular time and the demagnetizing
elbow is used for eliminating residual
magnetism of ore discharge products, coarse and fine fuzzy grading is completed on the electronic scale by utilizing the high flow rate of ore pulp and the
inertia and
sedimentation characteristics of minerals with different
size fractions; and only the proportions of the coarse and fine fractions of the ore
grinding products in different time periods are compared, so that the ore
grinding effects in different time periods are judged, and other parameters are adjusted to stabilize production.