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Mill Liners

Mill Liners

What are the Mill Liners

Mill liners are wear-resistant castings installed inside the mill shell, widely used in ball mills, SAG mills and rod mills for mining, cement and aggregate industries.

They have two main functions. First, they protect the mill cylinder from impact and abrasion caused by ore, rocks and grinding media (steel balls or steel rods). Second, their special profile lifts the grinding media to crush and grind raw materials.

Mill liners are consumable wear parts. Common materials include high manganese steel, high chromium cast iron and alloy steel. Different liner designs (shell liners, head liners) can be customized according to working conditions.

We provide matched mill liners for many well-known brands.

As the main grinding equipment for the production of concrete aggregates, highways, railways, and urban construction waste, the main wear parts of the ball mill are the mill liners.

SAIKUANG Casting’s high manganese / high chromium alloy mill liners have been applied to thousands of ball mills in dozens of countries and regions in Europe, South America, the Middle East, Africa and North America, and have won the trust and praise of customers for their high hardness, wear resistance and strong toughness.

Material Selection of Mill Liners

Material Working Conditions
Manganese Steel (Mn14,Mn18,Mn14Mo,Mn18Mo) This material is commonly used for grid liners and typically in smaller milling operations. A significant advantage of this material is its ability to work harden under stress, maintaining a tough substrate that can endure severe impacts without fracturing. However, its main drawback is that it tends to spread under the impact, causing solid liners to start pressing against each other and become challenging to remove. If the stress is permitted to accumulate to an excessive level, it can also lead to damage to the mill shell.
Low Carbon Chrome Moly Steel (300 to 370BHN) This material was widely employed for mill liners (AG, SAG, and Ball) before the transition to steels with higher carbon content. It exhibits outstanding wear characteristics coupled with some level of impact resistance. Presently, it is frequently utilized for discharge grates, where a marginally superior impact resistance is demanded in comparison to the higher carbon chrome moly steels, or for liners of thinner cross-sections.
High Carbon Chrome Moly Steel (325 to 380BHN) This steel is currently regarded as the primary material for SAG mill liners. There are several adaptations available, each with varying carbon or chrome contents. These variations often influence the size of the liner and the thickness of its cross-section. Continuous advancement is taking place in this field as the dimensions of the liners are surpassing the properties supplied by conventional high chrome moly steels.
High Chrome Irons (+600BHN) Cr Iron It is considered to have superior wear abrasion characteristics and is generally used in rod and ball mills. It is more cost-competitive but more brittle than chrome moly white irons.
Chrome Moly White Irons (600 to 700BHN) WI This cast material is considered to be the ultimate developed and used to date for abrasion resistance in Milling. It is commonly used in cement mills and some of the largest Ball Mills in the world and where performance has not been bettered to date.

Why SAIKUANG Casting Mill Liners?

SAIKUANG Casting Mill Liners are trusted by mill operators all over the world due to their 100% adaptability and the same quality as OEM parts.

Affordable prices with on-time delivery allow you to easily arrange the ordering cycle and a reliable supply chain to keep your project stable.

SAIKUANG Casting spare parts bring you benefits by premium wear life and service life, our wearing parts minimize the downtime of your machines, thus to reduce the cost per ton.

We maintain a large stock of mill liners for Metso, Magotteaux and Sandvik mills. They can be shipped within 3 days at the earliest to meet your urgent requirements.

Geniune Alternative Wear Parts
Mill Liners made by SAIKUANG Casting

Genuine Alternative Wear Parts Mill Liners made by SAIKUANG Casting.

SAIKUANG Casting guarantees 100% part adaptability, whether for OEM replacement parts or custom products. Common models we can support are: Metso, Sandvik, FLSmidth, Magotteaux…

We supply precision cast mill liners, including: Shell liners, Head liners, Feed end liners, Discharge end liners, Lifter bars, Plates, etc.

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