Unicast’s TiC inserts for a limestone crusher’s hammers significantly reduce abrasion
Unicast hammer with M19 manganese alloy and 60 mm-long TiC inserts.
Limestone crushing, Pennsylvania primary crusher
Improve the lifespan of the limestone hammer in UNACEM’s Pennsylvania primary crusher, which was getting only 200,000 metric tons per set of hammers.
UNACEM’s crusher was fitted with a Unicast hammer cast in an M19 manganese alloy with 60 mm TiC inserts.
Unicast was able to triple the life of the crusher’s hammer to 600,000 metric tons, offering a great value for the money UNACEM invested in the project.
At Compañía Cementera UNACEM’s Atocongo plant in Lima, Peru, the company was using hammers from local foundries in its Pennsylvania primary crusher. The hammers would only have a lifespan of 200,000 metric tons due to high abrasion.
UNACEM wanted to get a longer life out of its limestone crusher’s hammers, in order to reduce maintenance and labour costs and downtime incurred to switch out worn-down hammers.
In order to improve the hammer’s wear life, Unicast installed a set of hammers with a 19 per cent manganese alloy and . The inserts were 60 millimetres long, and had a hardness of 60 HRC. The — which has a nominal hardness HRC of 230-250 and is typically used for high-abrasion, lower-impact wear parts — was able to surpass the OEM replacement hammers in wear life. The TiC inserts improve the hammer's ability to withstand heavy impact, which increases its structural strength and lengthens its lifespan.
Unicast’s replacement hammer, cast in a M19 manganese alloy with TiC inserts, lasted three times longer than hammers made by local Peruvian foundries, saving UNACEM money on maintenance.