The production of artificial sand is the link with the highest technical content and the greatest difficulty in the production of sand and gravel aggregate, which is particularly important for roller compacted concrete. At present, there are two kinds of commonly used sand making process equipment, namely, rod mill and crusher. Through the operating experience of several sand and stone systems and the test summary of sand making from different rocks, it is concluded that the stone powder content after screening washing and spiral classifier grading is between 4% and 8%, which cannot meet the requirements of roller compacted concrete for stone powder content. In order to ensure the stone powder content of finished sand and stone materials, it is necessary to process finer sand powder through Raymond mill. HCMilling(Guilin Hongcheng) is the manufacturer of sand powder Raymond mill. The following is about the application of sand powder Raymond mill in the sand and stone production system.

The dry and wet screening method is selected for the sand and gravel production system, that is, the wet screening method is selected for the primary screening and the secondary screening, and the dry screening method is selected for the tertiary screening. There are sand for normal concrete and roller compacted concrete in the sand and gravel production system, and the stone powder content of sand for normal concrete is required to be 6%~12%, and the stone powder content of sand for roller compacted concrete is required to be 15%~19%. The requirements for stone powder content of roller compacted concrete are greatly increased. As the stone powder content of the sand produced by the secondary screening cannot meet the design requirements, and the stone powder content of the fine sand and stone powder recovered by the secondary screening stone washing water through the stone powder recovery device cannot meet the requirements after mixing with the finished sand, in order to ensure the stone powder content and stability of the finished sand, it is usually necessary to introduce the sand powder Raymond mill production line.

After stone powder is added to the sand Raymond mill production line, the stone powder content of sand can meet the design requirements, but the production of secondary screening is too limited to meet the requirements of high strength construction of the dam. Under this premise, the HC series large swing type sand powder Raymond mill developed and produced by HCMilling(Guilin Hongcheng) can adjust the proportion of sand powder according to the concrete demand. One equipment can produce powder and sand at the same time. Its output is about 2.5 to 4 times higher than that of ordinary sand powder Raymond mill, effectively reducing energy consumption. The HC3000 model is the current global super large sand powder Raymond mill, which can meet the needs of expanding industrial scale production, Greatly improve the equipment efficiency to meet the output requirements of the sand production system.

In addition to sand powder Raymond mill, HLM series sand vertical roller mill produced by HCMilling(Guilin Hongcheng) is also popular in the sand production system. If you have demand for stone powder processing, please feel free to contact us for details of the equipment and provide follow information to us:

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Product fineness(mesh/μm)

capacity (t/h)