Abstract: Mortar plants need both limestone powder and gypsum powder. Single grinding machine cannot satisfy different capacity and fineness demands. This article introduces LM + MTW matched composite building material powder production line.
Modern ready-mix mortar and new building material factories manufacture two main powders: limestone filler powder for desulfurization and building gypsum powder. The two materials differ greatly in required hourly capacity and powder fineness. Single grinding machine cannot balance processing efficiency for both limestone and gypsum.

SBM provides Composite Powder Production Line with matched LM Vertical Grinding Mill + MTW European Trapezium Mill. LM vertical mill focuses on mass limestone processing with maximum 700 t/h capacity and built-in drying system for high-moisture limestone. MTW European mill processes gypsum flexibly with 3–45 t/h adjustable capacity to satisfy raw material demand of gypsum board and putty. Two main machines share auxiliary equipment including dust removal, silo and packing system to cut total equipment investment and occupied workshop area largely.
The whole line adopts unified automatic central control system. Operators adjust powder fineness and output of two mills separately. Limestone powder and gypsum powder are stored in independent silos and packed into different finished products automatically. Sealed negative-pressure dust removal guarantees emission standards for building material industry. Multiple large building material industrial parks in Henan and Shandong adopt this dual-mill matching scheme. The line supplies desulfurization limestone powder and building gypsum powder at the same time and meets export demand of two kinds of powder products.
SBM engineers design matched model specification of LM and MTW according to annual output proportion of two powders and arrange material conveying layout. We provide free raw material testing, full equipment manufacturing, field installation, commissioning and operator training services.
If your building material plant needs simultaneous limestone and gypsum processing and wants optimized dual-mill matching scheme, send annual output of two materials and target fineness via online consultation. Our engineers deliver complete configuration drawings and investment budget for composite powder production line.
Summary: LM vertical mill undertakes large-scale limestone processing, matched with MTW European mill for gypsum production. Dual-mill combination fits building material factories producing multiple powders and saves workshop and equipment investment.
FAQ
Q: Does building material plant need two separate dust removal systems for limestone and gypsum processing?
A: No. Shared pulse dust collector can be equipped with separate silos for two powders to save investment.
Q: What scale of building material factory suits LM + MTW composite production line?
A: Optimal for factories with limestone annual output over 300,000 tons and gypsum annual output over 50,000 tons.
Q: Can shared automatic packing machine be used for two grinding mills?
A: Switchable packing machine can be matched to pack limestone powder and gypsum powder separately.