What are the special requirements for graphite ball mill?

As specialized grinding equipment for graphite processing, graphite ball mills must be designed and manufactured to meet the specific physical and chemical properties of graphite. These equipment adheres to specific standards, distinguishing them from conventional ball mills, in terms of material selection and process parameter control.

Graphite ball millsHigh-Purity Material Requirements

Graphite ball mills must be lined with stainless steel or ceramic to prevent iron contamination that could affect graphite purity. High-alumina ceramic balls with a Mohs hardness of 9 or higher must be used as grinding media to meet the requirements of graphite grinding while preventing contamination from media abrasion. The equipment's sealing system must meet IP65 protection to prevent graphite dust from leaking out, causing environmental pollution and material loss.

Graphite ball millsPrecise Process Control

Graphite ball mills must be equipped with a variable frequency speed control system with an adjustable speed range of 20-60 rpm to accommodate the process requirements of different spheroidization stages. The temperature control system must maintain the grinding temperature below 50°C to prevent high-temperature graphite oxidation. The grading system must be able to precisely control the output particle size within the 1-45μm range, meeting the stringent particle size distribution requirements for lithium battery anode materials.

Graphite ball millsSpecial Features
Professional graphite ball mills must be integrated with an inert gas protection system, and the oxygen content in the grinding chamber must be controlled below 100ppm. Some models require an online particle size measurement device to enable real-time monitoring and automatic adjustment of the grinding process. The equipment surface must be treated with anti-static protection, and the work surface resistance must be maintained within 10-10Ω to prevent static electricity accumulation in graphite dust.