Can coal gangue be used to produce sand, and can it meet construction requirements

In the public's perception, the raw materials for manufactured sand are typically chemically stable stones such as river pebbles, pebbles, greenstone, and granite, or common construction waste materials like concrete and bricks. Therefore, when first hearing about using coal gangue, a solid waste material, to produce sand, many in the sand and gravel industry are puzzled: Can coal gangue be used to produce sand? Can coal gangue sand production meet construction sand requirements? The following section provides an introduction:

Coal gangue can be used to produce sand and can meet construction requirements!

Coal gangue is a type of solid waste generated during coal mining and washing processes. Although its hardness is higher than that of coal, it remains a brittle black-grey rock that is easy to crush and process. After undergoing crushing and sand-making treatment, it can be processed into sand and gravel materials with uniform particle size, rounded particles, and reasonable gradation.

As for whether the sand produced from coal gangue can meet construction requirements, the answer is also affirmative! After being processed by professional sand-making equipment, the finished product has uniform particles, good compressive strength and permeability, and strong bonding properties. Its mineral and chemical compositions are consistent with those of commonly used manufactured sand, and it fully complies with the GB/T 14684-2011 standard for construction sand. It can be used to produce coal gangue cement, coal gangue bricks, lightweight aggregate for concrete, and other building materials. However, it is essential to use professional sand-making equipment for processing!

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