Modern Mining June 2025

Transnacional invests in Liebherr LG 1750

J221 overlay extends life of Warman Pump shaft sleeves at Mogalakwena

When Anglo American Platinum’s Mogalakwena mine in the Limpopo province wanted to extend the wear life of shaft sleeves in its Warman® pumps, Weir suggested the application of the J221 premium wear-resistant overlay hardened shaft sleeve. Testing was conducted on a Warman® MCR® 450 slurry pump at the North Concentrator to improve sleeve and packing wear life under conditions of contaminated or sub-optimal flush water. The J221 shaft sleeve’s trial performance was exceptional, lasting 14 240 hours under conditions of both regular operations and extensive pump sliming. This was an almost 10-fold improvement on the standard shaft sleeve. The solution has led to savings in both downtime and spare parts. Following the successful results, LeRoux Esterhuyse, Engineering Manager at the Mogalakwena North Concentrator,

Brazilian crane company Transnacional is ramping up its crane fleet with a used LG 1750 lattice boom mobile crane from Liebherr, thereby expanding its portfolio of crane services and capacity. To meet market and customer demands, as well as to ensure versatile use, the 8-axle model was selected. Following an in-depth market analysis and in light of growing demand for large cranes, the crane company chose to invest in the 750-tonner. “The demand for large cranes over 500 tonnes has long since been an issue for us. Our customers were increasingly asking for powerful machinery for complex projects such as in wind energy,” explains Napoleão Luna, Transnacional’s MD. “Following comprehensive technical and economic considerations, we chose the LG 1750 as it offers reliability, safety and exceptional performance. This crane now means we are able to offer our customers first-class solutions in new sectors”, adds Napoleão. n

The Warman AH 20/18 pump is designed for heavy duty applications.

reported: “Excited about the trial performance of the hardened shaft sleeve; let us roll it over to all primary and secondary mill discharge Warman pumps.” The J221 sleeves have since been implemented across all primary and secondary mill discharge pumps at Mogalakwena. n

JUNE 2025 | www.modernminingmagazine.co.za  MODERN MINING  39