Autogenous Mill and Semi-Autogenous Mill

Autogenous (AG) and Semi-Autogenous (SAG) mills perform mineral grinding at very high capacity by the impact of ore particles against each other or with the assistance of steel grinding balls. These mills are ideal for ore beneficiation circuits, offering lower energy consumption, easy maintenance, and high efficiency.

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Parts & Components Table

Part Name	Common Material	Function
Grate	Carbon Steel	Material Discharge Control
Liner	Carbon Steel	Body Protection and Crushing Efficiency Enhancement

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Mazandaran Steel Industries, relying on technical expertise and years of experience, has secured a distinguished position in the production of crusher and mill components in Iran. Utilizing modern technologies and high-quality raw materials, the company manufactures a wide range of components for Autogenous Mills (A.G. Mill) and Semi-Autogenous Mills (S.A.G. Mill), offering products that meet the highest quality standards. Liners, headwalls, and other consumable parts are among the key products, designed for durability, reliable performance, and extended service life.

Autogenous Mill (AG Mill)

Introduction and Function
The Autogenous Mill is an industrial mill in which the ore itself acts as the grinding media, eliminating the need for steel balls or rods. A large cylindrical drum rotates around a horizontal axis, and the ore pieces crush each other through impact and abrasion. The distinct advantage of this mill is the utilization of the material’s inherent energy for grinding, reducing the need for additional grinding media and lowering operational costs.

Applications:

Mining: Primary and secondary grinding of hard and semi-hard ores.

The AG Mill is an optimal choice for large mines and mineral processing plants due to its unique design, high capacity, operational efficiency, and significant reduction in operational costs.

Semi-Autogenous Mill (SAG Mill)

Introduction and Function
The SAG Mill combines the features of an Autogenous Mill and a Ball Mill. It is used for grinding hard and semi-hard ores, reducing feed size, and preparing the material for subsequent processing stages.

Working Principle:

Autogenous grinding: Larger ore particles act as grinding media, crushing smaller particles, similar to AG Mill.
Steel balls assistance: A portion (typically 6–15% of the mill volume) of steel balls is added to increase impact force, improve grinding speed, and reduce processing time.
Rotational motion: The cylindrical drum rotates, lifting the ore and steel balls, which then fall freely, applying pressure and impact to grind the material.

Applications:

Mining of gold, copper, iron, nickel, etc.
Processing units for hard and semi-hard ores.
Preparing material for final ball milling.

The SAG Mill is a versatile and efficient grinding solution, combining the benefits of autogenous and ball milling. By using both ore and steel balls, it ensures high grinding capacity and optimal efficiency, making it essential in large-scale mining operations worldwide.

Mazandaran Steel Industries produces key wear-resistant components for mineral mills, including liners, headwalls, and spare parts. These products are engineered for the highest quality and durability, ensuring reliable operation under the most demanding conditions in the mining industry.