H&G mill liners are subjected to different combinations of impact and abrasion, as they are used in SAG/AG, ball or rod mills. Our wear parts are manufactured to the highest standards of quality and delivery, ensuring high levels of reliability for our customers. Also, our mill liners wear parts add value to customers’ processes through customized designs.

Types Of Mill Liners

SAG/AG Mill Liners:
• Integrated and/or plate and lifter designs for head and shell liners
• Grates
• Pulp lifters
• Filler rings

Ball Mill Liners:
• Single wave liners
• Modified single wave liners
• Double wave liners
• Shell liners
• Feed head liners
• Discharge end liners

Rod Mill Liners:
• Shell liners
• Head liners
• “Wedge” shell liners

Mill Liner Material Selection

The selection of the material of construction is a function of the application, abrasivity of ore, size of mill, corrosion environment, size of balls, mill speed, etc. liner design and material of construction are integral and cannot be chosen in isolation. A list of the primary material of construction is given, with the particular uses and strengths of each.

1. Manganese Steel: This is used for grid liners, and generally smaller mills.Its great advantage is that it work hardens under stress, yet the substrate remains tough andcan withstand extreme impacting without fracture. Its primary disadvantage is that it spreads with impact, so solid liners begin to squeeze together and become extremely difficult to remove, and can damage a mill shell if the stress is allowed to build up to an extreme level.
2. Low Carbon Chrome Moly Steel (300 to 370BHN): Was generally used for mill liners (AG,SAG and Ball) prior to the movement to higher carbon content steels. It has excellent wear characteristics with some impact resistance, generally now used for discharge grates where slightly better impact resistance is required compared to the higher carbon chrome moly steels or for thinner section liners.
3. High Carbon Chrome Moly Steel (325 to 380BHN): This steel is now considered the main material used for SAG mill liners. There are a number of variations with either different carbon or chrome contents. The variations tend to have a bearing on the size of the liner and its section thickness. There is ongoing development within this area as the size of the liners are outstripping the properties provided by the standard high chrome moly steels.
4. Nihard Iron (550BHN): The use of this type of material generally began with Rod Mills and Ball Mills, where impacts were considered low enough for this brittle yet highly abrasive resistant wear material to perform well. However, it is now considered obsolete in light of the use of high chrome irons and chrome moly white iron.
5. 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.
6. 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.

Longer Mill Life, Higher Profit

Our mill liners are also tested to withstand the acidity level of different elements that may be present in the milling process. Longer milling life to your machine means fewer expenses and more profit or income to your company.

H&G can also be an issue. With the rubber formulated liners attached to your millers, it will not intervene with the grinding process, and thus, you are saving a lot of money with the maintenance.

Wear Out Mill Liners

To give our customers peace of mind, as you purchase liners from us, we will provide you the expected life duration of your liners. This will depend on your type of milling business, the number of grinding hours in a day and other factors that may affect the quality of your machine.

Entrust your business to the experienced team. Get in touch with us by getting a free quote from our website. Our team will get back to you with our advice and recommendations.

When it comes to high carbon chrome moly steel mill liners, H&G Mill Liners had focused to cast this material for our customer. Our high carbon chrome moly steel mill liners span life more than other foundries mill liners.

This material also called AS2074 L2C steel.This steel is now considered the main material used for SAG mill liners. There are a number of variations with either different carbon or chrome contents. The variations tend to have a bearing on the size of the liner and its section thickness. There is ongoing development within this area as the size of the liners are outstripping the properties provided by the standard high chrome moly steels.

Features

• The material of SAG mill liners are low C or high C Cr-Mo Alloy steel,which depends on the specific working condition of the SAG mill;
• Chromium and molybdenum both individually increase the hardenability of low alloy steel. Important synergistic effects, not yet fully defined, can also occur when Cr and Mo are used in place of single elements;
• Metallographic structure of AS2074 L2C Steel is Pearlitic;
• Chromium brings resistance to corrosion and oxidation, high temperature strength and abrasion resistance. Molybdenum helps maintain a specified hardenability and increases high temperature tensile and creep strengths. These grades are generally heat-treated to specified properties;
• This material hardness: 325 to 380 BHN

@Nick Sun   NICK@XZHUAGANG.COM