Abstract: Limestone serves as key raw material for power plant desulfurization and cement industry. Conventional mills suffer from low capacity and large occupation. This article introduces LM vertical mill’s integrated grinding technology, parameters and real limestone project cases.
Limestone is abundant non-metallic mineral. After grinding into powder, it becomes essential material for power plant flue gas desulfurization, commercial mortar, cement raw meal and feed additives. With stricter global environmental regulations, powder plant owners pay more attention to production capacity, dust control and comprehensive operation costs. Traditional Raymond mill and ball mill occupy huge land and consume excessive power, hardly meeting demands of large-scale factories.
Limestone features moderate hardness, with feeding size up to 50 mm. Some raw limestone contains high moisture, which requires separate dryers for ordinary grinding machines and raises overall investment. To solve this problem, SBM developed LM Vertical Grinding Mill. This equipment integrates crushing, grinding, drying, powder selection and conveying. Wet limestone can be fed directly without independent drying units, simplifying layout and reducing workshop space greatly.
SBM LM vertical mill adopts material bed grinding principle. Grinding rollers and grinding disc avoid direct contact, lowering metal wear steadily. The whole machine works under negative pressure with matched pulse dust collector, guaranteeing dust emission meets environmental standards. The intelligent control system supports remote operation and real-time fineness adjustment. Fineness ranges from 20 mesh to 400 mesh, and multiple models cover small, medium and super-large limestone factories with hourly capacity from 3 tons to 700 tons.
Many 300,000–400,000-ton annual limestone desulfurization projects in Shanxi and Inner Mongolia adopt this model. The machines run stably for three years without major failures. Wear parts enjoy long replacement cycles and low maintenance expenses. SBM delivers one-stop service including free raw material testing, production line layout design, equipment manufacturing, on-site installation, commissioning and operator training until factories reach stable production.
If you are planning a limestone grinding project and need advice on model selection, site layout or investment budget, please leave a message via online consultation. Provide raw material hardness, target capacity and required powder fineness. Our engineers will customize exclusive production line solutions and share videos of nearby running limestone projects.
Summary: LM vertical grinding mill is ideal for large-scale limestone powder production. Built-in drying system and sealed dust removal ensure eco-friendly operation. Its overall energy consumption is over 30% lower compared with traditional grinding equipment.
FAQ
Q: Does LM vertical mill need extra dryer for high-moisture limestone?
A: No. The built-in hot air drying system handles limestone with moisture ≤15% directly.
Q: What mesh size can LM vertical mill produce for limestone in one pass?
A: Adjustable from 20 mesh to 400 mesh. 250–325 mesh limestone powder is commonly used for power plant desulfurization.
Q: What supporting machines are needed for a complete LM limestone grinding line?
A: Crusher, bucket elevator, silo, LM main mill, pulse dust collector and powder packing machine.
