To meet the production demand of approximately 150,000 tons of mica powder per year, a mica-specific ball mill with a processing capacity of 20 tons per hour (20 tph) requires the following key technical specifications:

Firstly, material compatibility is crucial. Mica is soft, has a layered structure, and is easily brittle, and is sensitive to iron contamination. Therefore, the ball mill lining and grinding media should be made of high-purity ceramic, wear-resistant rubber, or stainless steel to avoid introducing metal impurities and ensure product whiteness and purity.

Secondly, production capacity and fineness indicators must be clearly defined: the continuous operation capacity of the equipment should be no less than 20 tph, and the product fineness is usually required to be D97 ≤ 45 μm (325 mesh), with some high-end applications requiring D97 ≤ 20 μm. Therefore, the ball mill should adopt a two- or three-chamber staged grinding design, with coarse crushing in the front chamber and fine grinding in the rear chamber, and be equipped with a high-efficiency dynamic classifier to achieve closed-loop circulation, improving energy efficiency and particle size uniformity.

Thirdly, the drive and energy-saving system should use a variable-frequency motor + central drive or edge drive structure, with an installed power of approximately 350–450 kW, and be equipped with an intelligent control system to automatically adjust the speed and feed rate according to the load, reducing unit energy consumption (target ≤ 45 kWh/t).

In addition, the equipment must have sealing and dustproof performance to prevent mica powder dust from escaping; and be equipped with a pulse dust removal system to meet environmental emission standards.

In summary, a 20 tph mica ball mill needs to be comprehensively designed in terms of material anti-contamination, particle size control, energy efficiency optimization, and environmental safety to meet the high-quality, low-consumption, and stable operation requirements of modern non-metallic mineral deep processing.