Our engineer is checking and inspecting sag liners’ dimensions at Mining plant

Our engineer is checking and inspecting sag liners’ dimensions at Mining plant.

Xuzhou H&G have already worked in this industry over 30 years. We mainly manufacture products of Metal Hammers/ Shredder, SAG Mill Liner, AG Mill liner, Ball Mill Liner, Chutes Liners, Casting Chrome grinding balls / cylpebs and Crusher spare parts.

When it comes to austenitc manganese steel mill liners, H&G Mill Liners had focused this material for long time. Our austenitc manganese steel mill liners span life more than other foundries mill liners.

This material used for grid liners, and generally smaller mills. Its great advantage is that it work hardens under stress, yet the substrate remains tough and can 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.

Austenitic manganese steel’s ability to work harden from impact loading along with its exceptional toughness make it the best wear material choice for many demanding applications.The hardness of manganese steel in the solution annealed and water quenched condition is normally around 220 HB. It is possible to strain harden this material to approximately 500 HB. In order to achieve this high hardness level, the impact loading must be high while the material wearing away from gouging abrasion is limited. It is typical in crushing applications were the main wear mechanism is gouging abrasion that the manganese steel will harden to some intermediate level, typically 350-450 HB.

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

This material also called AS2074 L2B steel.This steel is 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.

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

When it comes to chrome moly white iron mill liners, H&G Mill Liners had focused this material for long time. Our chrome moly white iron mill liners span life more than other foundries mill liners.

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.

The Features

• 600 to 700 BHN white iron
• Large ball mills
• Malleable Iron: cast as white iron,then malleabilised, or heat treated, to impart ductility. Consists of tempered graphite in an a-ferrite or pearlite
  matrix
• Common in cement mills
• Used for abrasion resistance