What kind of grinding machine is used to directly grind stones into powder with a capacity of over 20 tons per hour?

A grinding machine designed to directly grind stones into powder with a capacity of over 20 tons per hour is typically a roller mill or an impact mill. Two popular types of grinding machines that meet this requirement are:

1. Roller Mills:

Roller mills are used to grind solid materials into powder form. They work on the principle of compression and shear forces between two rotating rolls.roller mill. They are suitable for grinding limestone, coal, clay, and other soft to medium-hard materials.

Key features of roller mills:

* High capacity (up to 50+ tons per hour) depending on the machine size and application.

* Adjustable grinding gap to control the particle size of the finished powder.

* Low energy consumption compared to other grinding methods.

* Minimal maintenance requirements.

2. Impact Mills:

An impact mill is another option for directly grinding stones into powder. They use high-speed rotating hammers or grinding discs to break the material into fragments, and then separate the powder from the coarse particles through an air separator. Impact mills are suitable for grinding limestone, marble, granite, and other hard materials.

Key features of impact mills:

* High capacity (up to 20-50 tons per hour) depending on the machine size and application.

* Adjustable rotor speed and hammer/impeller configuration to control the particle size of the finished powder.

* Compact design and low space requirements.

* Requires more maintenance compared to roller mills due to the moving parts.

Note that the exact grinding machine selection depends on factors such as the raw material properties, desired particle size, production capacity, and budget. It's essential to conduct pilot tests or consult with experienced professionals to determine the most suitable grinding machine for your specific application.

Lastly, remember that large-scale stone grinding operations generate significant dust and vibration. Ensure that you incorporate appropriate dust collection and vibration control measures to maintain a safe and environmentally friendly working environment.