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Automatic Aluminum-Carbon Block Spraying Equipment
The automated aluminum-carbon block spraying equipment is an advanced, fully automated surface protection coating system specifically designed for aluminum electrolysis anode carbon blocks. At its core, the system applies a uniform anti-oxidation coating—either an aluminum film or an oxidation-resistant paint—to the surface of the carbon blocks, enabling unmanned, standardized, and highly efficient operations while addressing the challenges associated with manual spraying, such as uneven coating, low productivity, and significant environmental pollution.
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Product Center
Equipment functions: 1. Automatic feeding of carbon blocks into the equipment; 2. Automatic spraying detected by the equipment; 3. Cyclic spraying.
The automated aluminum-carbon block spray-coating equipment is an advanced, fully automated surface-protection coating system specifically designed for aluminum electrolysis anode carbon blocks. At its core, the system applies a uniform anti-oxidation coating—either an aluminum film or an oxidation-resistant paint—to the surface of the carbon blocks, enabling unmanned, standardized, and highly efficient operations while addressing the challenges associated with manual spraying, such as uneven coating, low productivity, and significant environmental pollution.
I. Core Uses and Value
Core application: Applying an anti-oxidation/anti-corrosion coating to anode carbon blocks used in aluminum electrolysis, thereby extending block life, reducing cell energy consumption, and minimizing oxidation-related burn-off.
Core Values:
Uniform coating: thickness deviation ≤ ±5%, coverage 100%, to prevent localized oxidation.
High efficiency: single-part spraying time ≤ 1 minute, with 24-hour continuous operation, boosting production capacity by 3–5 times.
Safety and Environmental Protection: Enclosed spraying combined with exhaust gas treatment to reduce dust, VOCs, and arc-related hazards.
Stable and reliable: parameters are fixed, repeatability is high, and performance is unaffected by human operator variability.
II. Overall Equipment Structure (Five Major Modules)
1. Conveying and Positioning System (Loading / Unloading)
Conveyor system: roller conveyor or chain conveyor, automatically feeding carbon blocks into and out of the spraying area.
Positioning/Clamping: Use stop cylinders, a rotary platform, and a clamping mechanism to ensure the carbon block is centered and stable.
Rotating mechanism: The platform rotates the carbon block 360°, enabling full-circle coating in conjunction with the spray gun.
2. Spraying Execution Unit (Core)
Spray guns/nozzles: arc spray guns, high-pressure airless spray guns, and electrostatic spray guns (with arc spraying of aluminum being the mainstream).
Motion mechanism:
Six-axis robot: high flexibility, suitable for irregularly shaped carbon blocks, and precise path control.
Gantry/Truss + Reciprocating Ball Screw: Fixed stroke, low cost, high speed.
Annular track: The spray gun travels along the outer periphery of the carbon block, making it suitable for large-sized blocks.
Adjustment functions: spray gun angle, distance, speed, and overlap ratio are programmably controlled.
3. Feeding and Control System (the Brain)
Material Supply System:
Coating / Aluminum Wire Supply: Stable wire feeding / coating supply with closed-loop flow control.
Pressure/flow sensor: real-time monitoring to ensure uniform atomization.
Control System:
PLC + touch screen: parameter setting, recipe storage, and one-touch start.
Robot controller: path planning, trajectory optimization, and collision avoidance.
Safety interlocks: door switches, emergency stop, smoke/temperature alarms.
4. Spray Booth and Environmental Protection System
Enclosed spray booth: prevents dust from escaping, with built-in lighting and an observation window.
Ventilation and dust removal: negative-pressure exhaust ventilation combined with cartridge or baghouse filtration, followed by purified air discharge.
Waste gas treatment: activated carbon adsorption/catalytic combustion for the treatment of VOCs and harmful gases.
Waste Collection: Bottom collection tray for recovering spray-painting waste.
5. Auxiliary Systems
Preheating/Drying: Infrared/Hot-air preheating to enhance coating adhesion.
Cooling: Air cooling or water cooling after spraying for rapid curing.
Inspection: online coating thickness measurement and visual appearance inspection.
III. Workflow (Fully Automated Closed Loop)
Material feeding and positioning: Carbon blocks are conveyed to the workstation, where they are automatically clamped, positioned, and aligned.
Parameter-based invocation: The system reads the carbon block model and calls the corresponding spray coating recipe (including speed, distance, and overlap ratio).
Automatic spraying:
The robot and reciprocating mechanism move along a programmed trajectory, while the spray gun performs synchronized atomized coating.
Rotating carbon blocks combined with moving spray guns achieve 360° full coverage.
Environmental protection treatment: Dust and exhaust gases generated during spraying are extracted and purified in real time.
Cutting/ Cooling: After spraying is completed, the workpiece is automatically conveyed to the cooling zone and then proceeds to the next process step.
Data logging: spraying time, coating thickness, process parameters, and any anomalies are automatically archived for traceability.
IV. Key Technical Features
Precise control: spray distance ±1 mm, speed ±0.1 m/s, and closed-loop thickness control.
Flexible adaptation: Supports carbon blocks of various sizes and shapes, with rapid changeover (≤10 minutes).
Safe and reliable: multi-layered protection, self-diagnosis of faults, and alarm for abnormal shutdowns.
Data-driven management: Real-time upload of production data, quality data, and equipment status, with integration into the MES.
Energy conservation and consumption reduction: efficient atomization minimizes paint waste, reducing energy consumption by more than 30% compared with manual application.
V. Applicable Industries
Aluminum Electrolysis Plant (Anode Carbon Block Oxidation Prevention)
Carbon Products Factory (Surface Protection for Carbon Blocks)
Metallurgy, Chemical Industry (High-Temperature / Corrosion-Resistant Coatings)
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No. 397, Baiyun Road, Baiyun District, Guiyang City, Guizhou Province
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