In a nutshell: Kelude Heavy Industry provides crane configuration solutions for stone processing facilities, covering all four production stages—raw block storage, cutting, grinding and polishing, and finished product warehousing. With lifting capacities from 3 to 50 tons and spans from 8 to 36 meters, the total investment in lifting equipment for a full plant typically ranges from approximately $30,000 to $445,000. The raw block yard is equipped with large-tonnage gantry cranes (16–50t), the cutting section uses overhead cranes (5–16t), the grinding area is fitted with under-running electric hoists (3–8t), and the finished goods zone relies on LD type single-girder cranes (5–16t)—delivering a complete heavy-lifting workflow from raw block handling to outbound shipment.
Crane Selection Guide for Stone Processing Plants
Raw Block Yard | Cutting Section | Grinding & Polishing | Finished Goods & Shipping
A complete crane selection guide for the four key production areas in stone processing: raw block storage, cutting, grinding/polishing, and finished goods dispatch.
Area 1: Raw Block Yard
• Lifting capacity: 16t–50t, MH type / grab bridge crane
• Individual block weight: 3–30t
• Outdoor-rated / wind-resistant design
• Custom lifting clamps / spreaders
Large-Tonnage Blocks | Clamps
Area 2: Cutting Section
• Lifting capacity: 10t–32t, QD type double-girder bridge crane
• Large slab cutting / flipping
• Saw blade replacement / equipment handling
• Wide span / multi-saw coverage
Large Slabs / Wide Span | Cutting
Area 3: Grinding & Polishing
• Lifting capacity: 3t–10t, LD type / jib crane
• Grinding head / pad replacement
• Equipment maintenance lifting
• Wet grinding / splash protection
Head Replacement | Splash Protection
Area 4: Finished Goods & Shipping
• Lifting capacity: 5t–16t, LD type / electric hoist
• Finished slab stacking
• A-frame / packaging
• Truck loading / dispatch
Selection Parameters Across the Four Production Zones
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| Parameter Item | Raw Block Yard | Cutting Section | Grinding & Polishing | Finished Product Dispatch |
|---|
| recommended model | MH Type/grab bridge crane | QD Typedouble-girder bridge crane | LD Type/jib crane | LD Type/Hoist |
| Lifting Capacity | 16t~50t | 10t~32t | 3t~10t | 5t~16t |
| special requirements | Raw Block Fixture | Large Span/Tilting | Grinding Head/Splash Guard | Finished Product Stacking |
$30,000–$445,000
Total Plant Investment
3–50 short tons (2.7–45 t)
Lifting Capacity
A4–A6
Work Duty Classification
IP54
Protection Rating (IP)
1–100,000 m²/yr
Panel Production Capacity
Overhead Cranes for Every Stone Processing Stage
Raw block storage yards handle individual stone blocks weighing 3–30 short tons (2.7–27 t), requiring large-tonnage cranes in the 16–50 short ton range (14.5–45 t) with purpose-built grabs. In the cutting section, frame saws demand wide-span cranes capable of covering multiple sawing stations simultaneously.
Kelude — Service Advantages
Kelude has spent years specializing in lifting solutions for the stone processing industry, delivering end-to-end crane systems for marble, granite, and engineered stone plants — from raw block handling to finished slab packaging. Our product line covers gantry cranes, overhead cranes, and electric hoists across the full capacity range, backed by extensive experience equipping heavy-duty, wear-resistant workshops in stone fabrication facilities.
Large-Tonnage Gantry Cranes for Block Yards
Loading, unloading, and transferring raw stone blocks — marble blocks weighing 15–25 short tons/m³ (13.6–22.7 t/m³) and granite blocks at 20–30 short tons/m³ (18.1–27.2 t/m³) — requires heavy-duty gantry cranes rated at 16–50 short tons (14.5–45 t). Kelude recommends the MH or MG series gantry cranes with spans of 26–118 ft (8–36 m) matched to yard width. These cranes come with hydraulic or mechanical block grabs that clamp the block from both sides, eliminating the need for rope slinging.
Bridge Cranes for Cutting & Processing Zones
Equipment maintenance and slab handling in cutting areas — multi-wire saws, bridge saws, and the like — call for overhead cranes rated at 5–16 short tons (4.5–14.5 t). Kelude recommends the LD type single-girder electric overhead crane with variable-frequency drive (VFD) and lifting speeds of 4–8 m/min. Given the heavy coolant splash and stone dust accumulation in cutting zones, crane motors are fully sealed to IP55, and crane rails are hot-dip galvanized for corrosion resistance.
Finished Slab Packaging & Loading
Finished stone slabs — typically 2.4–3.2 m × 1.6–2 m and weighing 200–500 kg each — require crane assistance for packaging and truck loading. Kelude recommends 5–10 short ton (4.5–9 t) LD type single-girder cranes fitted with stone-specific A-frame spreaders or vacuum lifters, capable of moving 1–4 slabs per lift. Radio remote control is recommended for the packaging area, giving workers the freedom to operate the crane from any position.
FAQ — Frequently Asked Questions
Q: Why does a stone block crane require a lifting capacity of 16–50t?
A: Stone block density ranges from 2.5 to 3.0 t/m³ (marble at 2.5 t/m³, granite at 3.0 t/m³). The most common block size is 2.5m × 1.3m × 1.3m (about 4.2 m³), weighing 10.5–12.6t per piece. Larger blocks can reach 3m × 2m × 2m (12 m³), weighing up to 36t. Adding the weight of the block fixture or wire rope (0.5–1.5t), the total lifting capacity needed is 16–50t. Kelude recommends sizing the gantry crane for the block yard at 1.5 times the weight of the largest incoming block.
Q: What dustproof measures are recommended for cranes in stone cutting and processing areas?
A: In stone cutting zones, water mist from cooling systems mixes with stone dust to form abrasive deposits that severely wear down crane components—radiator blockage in motors (temperature rise increases by 20–30°C), premature wire rope wear and failure (service life reduced to one-third or one-half of normal), and accelerated wear on crane rails and wheels. Kelude's dustproof solution includes: IP56 fully sealed motors with Stainless Steel housings, Galvanizing of wire rope with periodic application of rust preventive grease, polyurethane crane wheels instead of steel wheels (to reduce rail wear), and compressed air blowdown after each shift.
Q: How do I choose a vacuum lifter for packaging large stone slabs?
A: For packaging and handling large stone slabs (2.4–3.2 m × 1.6–2 m, 200–500 kg per slab), a vacuum lifter is the recommended solution. The number of suction cups depends on the slab area and surface flatness (at least 4 suction cups per square meter). Cups are made of polyurethane for wear resistance and scratch-free handling of stone surfaces. The lifter is equipped with a vacuum accumulator and an audible and visual alarm that triggers when vacuum pressure drops below the set threshold. Kelude offers stone-specific vacuum lifters capable of handling 1–4 slabs per lift, delivering a 3–5× efficiency improvement.
Q: What should be considered when selecting a crane for a stone processing plant?
A: Stone processing plants present unique challenges: ① The raw block storage area handles heavy loads (16–50 t), requiring QU80 heavy-duty rails and heavy-duty crane wheels; ② The cutting zone generates large amounts of cooling water, demanding IP56 protection and a properly designed drainage slope; ③ Stone dust accelerates wear on moving parts, so effective sealing and regular cleaning are essential; ④ The finished product area requires high surface quality, calling for soft-contact lifting spreaders with polyurethane or rubber padding. Kelude offers a turnkey solution for stone processing plant cranes, covering everything from selection to anti-corrosion and guards.
