South Africa is rich in coal resources, and coal crushing is a critical process in local mines and coal preparation plants. Coal crushing must balance particle size control and throughput efficiency—reducing large coal blocks to the target size while minimizing over-grinding to avoid excessive fines that affect downstream washing or combustion efficiency.

After extensive comparison, a South African customer selected the Hua Sheng Ming 4PGT0404 four-roll crusher for their coal fine crushing operation.

Four-roll crusher

The project is located in South Africa, processing coal with a feed size of ≤100mm and a discharge size requirement of ≤5mm. The unit features an upper toothed roll and lower smooth roll configuration, equipped with a custom voltage motor adapted to South Africa’s local power supply, eliminating the need for additional transformers and simplifying on-site electrical integration.

The 4PGT0404 four-roll crusher adopts a four-roll, two-stage crushing structure. Material is first coarse-crushed by the upper rolls, then fine-crushed by the lower rolls—two crushing stages in a single pass, eliminating the need for secondary crushing equipment. The upper toothed rolls provide strong material grip for effective feeding of large coal blocks, while the lower smooth rolls apply precise compression to control discharge size to ≤5mm, meeting the customer’s process requirements. The roll gap is adjustable to flexibly control product size for different downstream coal specifications, and the unit handles varying moisture content without clogging.

Four-roll crusher advantages

Equipment supplied includes the 4PGT0404 four-roll crusher main unit, custom voltage motor (matched to South Africa’s local voltage), control cabinet with cables, and spring or hydraulic protection devices.

After commissioning at the customer’s South Africa site, the equipment has operated stably. Raw coal feed of 100mm, processed through the two-stage four-roll crushing system, is consistently reduced to below 5mm. The toothed/smooth roll combination delivers both crushing efficiency and size accuracy, with low over-grinding and minimal fines generation, fully meeting the customer’s coal particle size requirements. The customer reported stable operation, low failure rates, and easy maintenance. Hua Sheng Ming products have been exported to South Africa and many other countries—this project further demonstrates the company’s equipment delivery and service capabilities in the overseas coal crushing market.

Four-roll crusher structure

The key to coal crushing lies in balancing throughput, discharge size, and over-grinding rate. The Hua Sheng Ming 4PGT0404 four-roll crusher, with its two-stage crushing, toothed/smooth roll combination, and adjustable particle size, delivers a stable and efficient coal fine crushing solution for South African customers. With low moisture sensitivity, adjustable discharge size, and smooth operation, the four-roll crusher is well-suited for coal fine crushing applications.