QZ double girder overhead crane is composed with Girder frame and grab bucket to grab materials, Crane travel device, and the trolley with lifting and moving device. There are Pave the rail for the trolley move on the main girder.Assemble the moving table on the outside of the two main girder, one side is prepare for the assemble and maintenance the crane move device, another side is prepare for the assemble of the trolley conductor device.There are full field of view Cabin suspend under the main girder, there are joint control desk or single control box packed within the Cabin, assemble the sidelong ladder between the Cabin and moving table, The main girder joint with the two side end carriage which with the joint point in the middle.

1. Port & Terminal Bulk Cargo Handling Coal Handling: Loading and unloading coal from bulk carriers, barges, and railcars with high‑throughput grab operations. Iron Ore Transfer: Moving iron ore from vessels to stockpiles or directly to loading hoppers for rail or truck transport. Aggregate Handling: Loading sand, gravel, crushed stone, and other construction aggregates onto barges, trucks, or conveyors.

2. Power Generation Plants Coal Yard Operations: Stacking and reclaiming coal from storage yards, feeding coal to crushers and conveyors for boiler supply. Biomass Handling: Moving wood chips, pellets, agricultural residues, and other biomass fuels for co‑firing or dedicated biomass plants. Ash Handling: Removing fly ash, bottom ash, and slag from storage silos and ponds for disposal or beneficial reuse.

3. Steel Mills & Metal Processing Raw Material Handling: Unloading iron ore, pellets, coke, limestone, and other raw materials from vessels, railcars, or trucks. Scrap Metal Loading: Handling ferrous and non‑ferrous scrap metal with heavy‑duty scrap grabs for charging electric arc furnaces. Slag Handling: Removing slag from steelmaking operations and transporting it to processing or disposal areas.

4. Chemical & Fertilizer Plants Raw Material Unloading: Transferring bulk chemicals, salts, sulfur, and phosphate rock from ships, railcars, or trucks to storage. Product Loading: Loading finished chemical products, fertilizers, and plastic resins into railcars, trucks, or barges. Corrosive Material Handling: Equipped with corrosion‑resistant grabs and coatings for handling aggressive chemicals and acids.

5. Cement & Building Materials Industry Clinker Handling: Loading and unloading cement clinker from vessels or storage yards to grinding mills. Gypsum Transfer: Moving gypsum for cement production and wallboard manufacturing. Limestone & Clay: Handling raw materials for cement production with high‑capacity grab operations.

6. Mining & Mineral Processing Ore Handling: Loading and unloading copper ore, bauxite, nickel ore, manganese, and other minerals at port facilities or processing plants. Concentrate Transfer: Moving mineral concentrates (copper, zinc, lead, etc.) from storage to railcars or trucks. Overburden Removal: Handling overburden and waste rock in open‑pit mining operations with large‑capacity grabs.