Grinding Equipment

Industrial Mining Grinding Mills & Equipment Manufacturer

Shenyang Muren Machinery supplies heavy-duty industrial grinding mills for mineral processing plants, cement production lines, and industrial material grinding operations worldwide. From single-unit replacements to complete comminution circuit supply, our engineering team builds grinding equipment tailored to targeted feed sizes, hardness (Work Index), and throughput demands.

Mining Ball Mills for Grinding and Blending

Technical Specifications

Shell Size (Dia. x L) (mm)	Effective Volume (m3)	Max Feed Size (mm)	Discharge Size (mm)	Capacity (t/h)	Motor Power (kW)	Total Weight (t)
1500 x 3000	4.8	<= 20	0.074 - 0.4	2.0 - 5.0	75	16.8
2100 x 3600	11.0	<= 25	0.074 - 0.6	6.5 - 30	245	34.0
2700 x 4000	20.5	<= 25	0.074 - 0.4	18 - 52	380	58.5
3200 x 4500	32.8	<= 25	0.074 - 0.4	35 - 95	800	96.0
3600 x 6000	55.0	<= 25	0.074 - 0.3	60 - 160	1250	145.0
4000 x 6000	68.0	<= 25	0.074 - 0.3	85 - 210	1600	182.0

Application & Equipment Compatibility

Metallic Ores

Copper, gold, iron ore, lead-zinc, molybdenum, and nickel processing.

Industrial Minerals

Quartz sand, feldspar, limestone, lithium hard-rock processing (spodumene).

Circuit Integration

Fully compatible with spiral classifiers, hydrocyclone clusters, vibrating screens, and downstream flotation or magnetic separation units.

Custom Manufacturing & OEM Engineering

Drive Configurations

Single-pinion spur gear drives, dual-pinion synchronous setups, or low-speed ring motor (gearless) interface designs.

Liner Profile Options

High-chromium cast iron (15% to 28% Cr), rubber-composite liners for fine grinding, and manganese steel liners for impact resistance.

Bearing Systems

Self-aligning double-row spherical roller bearings or hydrostatic/hydrodynamic trunnion bearings with continuous oil lubrication units.

Structural Retrofits

Custom center-distance adjustments for trunnion bearing pedestals to drop into existing concrete foundations.

Manufacturing & Quality Control

Every mill shell and drive component is fabricated within our heavy machine shop under audited production workflows:
Raw Plate Inspection -> CNC Plasma/Flame Cutting -> Heavy Roll Bending -> Submerged Arc Welding (SAW) -> Stress Relief Heat Treatment -> Machining on Vertical Lathes -> Girth Gear Matching -> Pre-Assembly & Run Test

Weld Integrity: 100% Ultrasonic Testing (UT) and Radiographic Testing (RT) on main longitudinal and circumferential shell seams per AWS D1.1 / ASME Section VIII standards.

Thermal Processing: Full-shell annealing in temperature-controlled furnace pit to eliminate residual welding stresses prior to final machining.

Girth & Pinion Gear Manufacturing: Cast or forged alloy steel (42CrMo or 35CrMo), hobbed on multi-meter gear generators, and surface-hardened to HB 260-300 or higher.

Factory Acceptance Testing (FAT): No-load rotational run testing at our assembly floor to measure noise levels (< 85 dBA), vibration displacement, bearing temperature stabilization, and gear mesh alignment.

Spare Parts & After-Sales Support

Replacement Liners

Wave liners, step liners, shell lifter bars, and grates cast to exact metallurgical requirements.

Trunnions & Seals

Machined forged steel trunnions with heavy-duty radial lip seal assemblies.

Girth Gears & Pinion Shafts

Custom-cut spur and helical gears matching existing OEM footprints.

Field Support

On-site foundation checking, trunnion alignment guidance, girth gear backlash adjustments, and operator maintenance training.

Packaging & Delivery

Shell Sections

Shot-blasted, coated with anti-corrosion primer, and fitted with end-cap protective covers for ocean freight. Large diameter shells (over 4.0 m) are shipped in split segments for jobsite bolted flange assembly.

Girth Gears & Precision Shafts

Wrapped in VCI (Vapor Corrosion Inhibitor) anti-rust film and enclosed in solid wooden crates with internal timber supports.

Small Components & Fasteners

Packed in heavy-duty export plywood cases with steel strapping.

Documentation Included

Dimensional approval drawings, mill test certificates (MTC), non-destructive testing (NDT) reports, installation manuals, and lubrication charts.

Procurement Process

01/

Inquiry & Slurry/Ore Data Submission: Provide ore type, feed size (F80), target output size (P80), Bond Ball Mill Work Index (kWh/t), and required daily tonnage.

02/

Technical Proposal & General Arrangement (GA) Drawing: Our engineers issue preliminary sizing calculations, motor power requirements, and a 2D GA layout drawing within 48 hours.

03/

Design Freeze & Manufacturing Plan: Finalization of liner selection, motor/gearbox brand choices (e.g., Siemens, SEW, or local heavy-duty equivalents), and delivery schedule.

04/

Production & Inspection: Progress photos, material certs, and NDT reports provided at key inspection hold points.

05/

Pre-Shipment Inspection (PSI): Third-party inspection (SGS, TUV, Bureau Veritas) welcomed prior to loading.

06/

Dispatch & Commissioning Support: Delivery FOB, CFR, or CIF with technical documentation and remote or on-site commissioning assistance.

Our Factory

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Q: What information is required to select the correct ball mill size for a mine project?

A: We require the target plant capacity (metric tons per hour), feed size distribution (F80), desired product fineness (P80), ore bulk density, and the Bond Work Index (kWh/t). If laboratory grinding tests are unavailable, we can estimate sizing based on ore type and benchmark data from similar deposits.

Q: How do you prevent gear tooth pitting and trunnion bearing failure?

A: We use forged 42CrMo steel for pinions and alloy cast steel for girth gears, strictly controlling tooth profile tolerances through precision gear hobbing. Trunnion bearings feature continuous force-feed oil lubrication systems with pressure switches and temperature sensors connected to the mill control panel for automatic shutdown protection.

Q: Can your factory build replacement shells or girth gears for existing third-party mills?

A: Yes. We manufacture replacement components according to customer drawings or field-measured dimensions. Our engineering team verifies trunnion centerlines, bolt hole pitch circles, and gear module specifications to ensure seamless fitment with existing civil foundations and drive trains.

Q: What liner material should be selected for high-abrasion gold or copper ores?

A: For coarse grinding stages with high impact from large steel balls, high-manganese steel or alloy steel liners (28% Cr) are recommended. For secondary fine grinding stages where abrasion resistance is critical, high-chromium cast iron liners provide significantly longer service life between changeouts.

Q: How are large diameter mill shells transported to international mine sites?

A: Shells within road transportation limits (typically under 4.0 m shipping diameter depending on route) are shipped as single-piece structures. Larger shells are manufactured and flange-machined in 2 or 4 longitudinal segments at our workshop, match-marked, and bolted/welded together during field erection.

Q: What certifications and inspection documents are provided with the equipment shipment?

A: Each grinding mill shipment includes a Quality Assurance Package containing Material Test Reports (MTC) for structural steel and castings, Ultrasonic and Radiographic Inspection Reports for shell welds, Heat Treatment charts, Dynamic Balancing reports for high-speed shafts, and the Factory Acceptance Test (FAT) sign-off sheet.

As one of the most professional grinding equipment manufacturers and suppliers in China, we're featured by quality products and good price. Please rest assured to wholesale durable grinding equipment from our factory. We also accept customized orders.

grinding equipment, Mining Ball Mills for Grinding and Blending