Abstract: The LM-Y Vertical Pre-grinding Roller Mill revolutionizes traditional equipment by producing sand and powder simultaneously. A single machine completes both sand making and powder grinding, making it suitable for processing limestone and quartz used in specialty mortar. It delivers excellent particle size distribution and streamlines the entire aggregate processing line.
Traditional processing of raw materials for dry-mixed and specialty mortars requires separate sand-making and grinding machines, resulting in lengthy production processes, high equipment costs, and large footprints. It is difficult to precisely control the gradation of sand, gravel, and powder, leading to unstable strength and workability in the finished mortar. The SBM LM-Y Vertical Pre-grinding Roller Mill achieves integrated sand and powder production, with a single unit simultaneously producing qualified fine sand and fine powder, suitable for processing mortar aggregates such as limestone and quartzite.
The core highlights of the LM-Y Vertical Pre-grinding Roller Mill are "simultaneous sand and powder output" and "multifunctional operation," After being crushed and ground by the grinding disc, larger particles form high-quality manufactured sand with a particle size of ≤3 mm, while fine powder is simultaneously ground to a size of less than 0.08 mm. In the final product, the proportion of fine powder (≤0.08 mm) is ≥25%, and the proportion of sand (≤3 mm) is ≥80%. This natural, continuous gradation perfectly meets the standards for special-purpose mortar and exterior wall dry-mixed mortar aggregates, eliminating the need for additional adjustment of the sand-to-powder ratio.
The equipment has a production capacity range of 30–900 t/h, with models ranging from LM19-2Y to LM27-3Y. It can process materials stably with a feed size of ≤35 mm and a raw material moisture content controlled at ≤3%, making it suitable for brittle ores such as limestone, quartzite, and dolomite. The compact design of the entire unit occupies significantly less floor space than two separate sets of sand-making and grinding equipment, substantially reducing investment in plant construction and conveying systems. The integrated crushing and grinding process achieves one-step material processing, simplifying the workflow, reducing the need for auxiliary equipment such as conveyors and elevators, and lowering long-term maintenance requirements.
The equipment operates efficiently and energy-efficiently, with crushing and grinding performed simultaneously; the comprehensive energy consumption per unit of sand and aggregate is lower than that of traditional separate systems. The unit features a sealed, negative-pressure dust collection system that centrally collects dust, meeting environmental requirements for building materials aggregate processing. The finished sand and powder have rounded particles with low needle- and flake-shaped content; when combined with mortar admixtures, they deliver excellent construction performance. Numerous special mortar aggregate production lines in China utilize the LM-Y Vertical Pre-grinding Roller Mill, with a single unit meeting all requirements for both coarse and fine aggregates in mortar production.
The processing of mortar raw materials imposes strict requirements on sand and powder gradation; the hardness and moisture content of the raw materials directly affect the proportions of the finished product. Blindly selecting a model may result in an excess of powder or a shortage of fine sand. If you are involved in the production of dry-mixed mortar or special mortar aggregates and process raw materials such as limestone or quartzite, you can leave a message via the Business Messenger on this page specifying the hardness of your raw materials and your planned hourly production capacity. SBM engineers will precisely match the appropriate LM-Y Vertical Pre-grinding Roller Mill model and provide a layout plan for an integrated sand and powder production line.
Summary: For dry-mixed and specialty mortar aggregate processing, choose the SBM LM-Y Vertical Pre-grinding Roller Mill. Simultaneous sand and powder production reduces equipment investment. Leave a message via the Business Messenger on this page to inquire about mortar production capacity and obtain a sand-and-powder integrated production line solution.
FAQ
Q: Can the LM-Y Vertical Pre-grinding Roller Mill produce both manufactured sand and fine powder simultaneously?
A: Yes, it produces both sand and powder from a single machine, simultaneously generating fine sand ≤3 mm and powder ≤0.08 mm, with a gradation suitable for specialty mortars.
Q: What is the moisture content requirement for raw materials processed by the LM-Y Vertical Pre-grinding Roller Mill?
A: The moisture content of the feed material must be ≤3%. Excessive moisture will affect the sand-powder classification efficiency; a simple drying pretreatment process can be implemented as needed.
Q: In which industries is the LM-Y Vertical Pre-grinding Roller Mill primarily used?
A: It is primarily used for processing aggregates for dry-mixed mortar and specialty mortar, and can also be used for the integrated production of building material aggregates from limestone and quartzite.
