Краны для горнодобывающей промышленности and Quarries: Heavy Double-Girder, Grab, and Dust-Proof Selection
Горнодобывающая промышленность and quarry duty cycles punish standard cranes. Abrasive dust, shock loading, and continuous grab work mean a general-purpose overhead crane will fail early. For buyers specifying equipment for aggregate plants, cement works, coal handling, or metal ore yards, the practical answer is usually a heavy double-girder crane with a purpose-matched grab and dust-protection package. This guide covers the models, capacities, and specification points that matter when you request a quote.
Why Double-Girder for Горнодобывающая промышленность Duty
Single-girder cranes such as the LD (0.5–20T) suit light maintenance and workshop lifting, but grab service changes the calculation. A grab plus its payload is a concentrated, swinging load, and the duty class is обычно A5–A7 under GB/T 3811 or FEM 1.001. The QD universal double-girder crane (5–150T) is the standard workhorse here, and for continuous ore or coal handling the YZ metallurgical double-girder (5–125T) is the better match because it is built for high-frequency, high-temperature, and impact-prone cycles. Both use Q345B box girders and can be supplied to DIN 15018 or CMAA #70 on request.
For outdoor stockyards and rail-served quarries, the MG double-girder gantry and RMG rail-mounted container gantry cover spans where a runway building is impractical. Судостроение gantry variants handle heavy fabricated sections if your site also does maintenance fabrication.
Grab Selection: What Actually Moves Ore and Aggregate
The grab is where most under-specified projects lose productivity. Match the grab type to the material, not just the crane tonnage:
- Clamshell grab (double-rope, 0.5–6 m³): the default for sand, gravel, crushed stone, and coal. Two-rope closing gives positive digging force. Size the crane so grab dead weight plus material stays within rated capacity — a 4 m³ grab on wet gravel can weigh over 5T empty.
- Orange-peel grab (0.75–2 m³): better for irregular lump ore, slag, and rocky spoil where a clamshell will not seal.
- Single-rope grab: only for light, free-flowing material. Avoid for quarry duty; the closing force is too low.
- Electro-hydraulic grab: consider when you need independent closing force or work from a hook without a double-drum hoist. Higher maintenance, but useful on mixed fleets.
State the material bulk density, maximum lump size, and required tonnes per hour in your inquiry. A 20T QD crane with a 3 m³ clamshell moving 400 t/h is a very different specification from the same crane lifting 20T of bundled steel.
Dust: The Real Killer of Горнодобывающая промышленность Краны
Quarry and ore dust is abrasive and conductive. It destroys standard bearings, shorts control panels, and accelerates wire-rope wear. Practical countermeasures, in order of cost-effectiveness:
- IP55 or IP65 motors and panels. Specify IP65 for crusher buildings and screening stations. Schneider, Siemens, ABB, and SEW components are available in these ratings.
- Sealed rope drums and shielded festoon or conductor-bar systems. Open festoon cable trays fill with grit within months.
- Dust covers on hook blocks and grab hydraulic units. Cheap insurance on electro-hydraulic grabs.
- Forced ventilation or air-purge on control cabinets in high-dust zones, plus routine filter changes written into the maintenance schedule.
- Anti-corrosion coating systems for wet-process plants and coastal quarries.
For sites where operators should not be exposed to dust or heat, the QDS smart unmanned double-girder crane supports automated grab cycles and remote operation. It is worth quoting when your plant runs multiple shifts and labor exposure is a constraint.
Specification Checklist Before You Запросить цену
- Rated capacity and duty class (A5, A6, or A7) — do not accept a generic "heavy duty" label.
- Span, lifting height, and travel length, including any rail extension for future stockpile growth.
- Material: bulk density, lump size, moisture, temperature.
- Required throughput in tonnes per hour, and grab volume/type.
- Power supply: 380V/50Hz, 415V/50Hz, 440V/60Hz, or other.
- Environment: indoor, outdoor, dusty, corrosive, ambient temperature range.
- Сертификация required: CE, EAC (TR CU 010/020), GCC/SASO, SONCAP, or KEBS.
Delivery, Сертификация, and Support
Chunhua Кран supplies mining and quarry cranes built to GB/T 3811 with FEM 1.001, DIN 15018, or CMAA #70 on request, using Q345B/Q235B steel and Schneider, Siemens, ABB, or SEW drive and control components. Export documentation covers CE, CCC, EAC, GCC/SASO, SONCAP, and KEBS for 60+ countries. There is no MOQ, quotes are returned within a 4-hour SLA, production runs 30–45 days, and every crane carries a 12-month warranty.
Отправить your material data, duty class, span, and throughput target to WhatsApp +86 193 9277 7259 or yuhua0095@gmail.com for a model recommendation and budget figure. Include grab volume and dust conditions and the quote will come back with a matched QD or YZ configuration rather than a generic tonnage.