Does the sand produced from coal gangue meet the standards for building sand?

Yes, sand produced from coal gangue can meet the standards for building sand, provided it undergoes proper processing and treatment. Coal gangue, which is the waste material generated during the mining and processing of coal, contains silica and alumina components that can be transformed into high-quality sand.

To meet building sand standards, the coal gangue sand must be processed and treated to remove impurities and ensure it has the correct particle size, shape, and gradation. This can be achieved through various methods, such as:

Mechanical processing: Coal gangue is crushed and screened to produce sand of the desired particle size. This process may involve multiple stages of crushing and screening to achieve the desired gradation.

Chemical treatment: The sand may be treated with chemicals to remove impurities, such as clay, organic matter, and heavy metals. This can be done using processes like flotation, leaching, or neutralization.

Physical treatment: The sand may be subjected to physical treatments, such as washing or drying, to remove excess moisture or other impurities.

Once the coal gangue sand has been processed and treated, it must meet the relevant building sand standards specified by the country or region where it will be used. These standards typically cover aspects such as particle size distribution, gradation, impurity content, and strength.

Using coal gangue sand as a substitute for natural sand has several advantages, including reduced environmental impact, lower costs, and a more sustainable supply of construction materials. However, it is essential to ensure that the processed sand meets the required standards to guarantee its quality and suitability for building purposes.