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Product Description
We are a Zhengzhou-based industrial drying equipment manufacturer with over 17 years of experience in non-ferrous metal concentrate processing. Our 55,000-square-meter factory houses CNC laser cutters, robotic welding cells, dynamic balancing rigs, and ultrasonic flaw detectors. Annual output exceeds 300 sets. As a true manufacturer — not a trader — we sell directly to global mining operators, copper smelters, and EPC contractors, eliminating every middleman layer. Ex-factory pricing undercuts market traders by 20% to 35%.
This energy-saving copper concentrate dryer system is engineered for operations that refuse to waste a single kilowatt. It targets medium-to-large-scale copper mines and smelters processing 5 to 80 tonnes per hour of wet copper concentrate with 10%–18% moisture, delivering a final product at 0.3%–1.0% moisture — the exact specification required for flash smelting, reverberatory furnace charging, and hydrometallurgical leaching circuits. What sets this system apart from every conventional dryer on the market is not just how it dries — it is how it recycles every joule of heat that would otherwise escape into the atmosphere.
The drum is fabricated from Q245R boiler-grade steel, interior-lined with Mn13 high-manganese cast steel, lift flights forged from ZGMn13-4 alloy, and critical wear zones protected with 95% alumina ceramic overlays — service life exceeding 10,000 hours. The burner system accepts natural gas, diesel, LPG, heavy oil, steam, or thermal oil. But the real innovation lies in the integrated thermal recovery loop: exhaust gas from the drying drum does not simply vent to stack. It passes through a cyclone separator, then a pulse-jet baghouse, then into a heat exchanger that preheats incoming combustion air and feed material. In confirmed field installations, this closed-loop heat recovery alone cuts fuel consumption by 18%–25% compared to open-cycle dryers.
Control is managed by a Siemens S7-1500 PLC driving a 12-inch Weinview HMI touchscreen, with English, Russian, French, Spanish, and Arabic language toggles. The system incorporates PID-based intelligent temperature profiling with real-time thermocouple feedback — a technology directly inspired by proven copper smelting drying practices where temperature must stay below 380°C to prevent copper sulfide oxidation and keep desulfurization rate under 0.3%.
We hold ISO9001, ISO14000, and CE certifications. Equipment ships to more than 50 countries across Africa, Central Asia, Southeast Asia, South America, and Oceania. We have served over 1,400 overseas clients.
Working Principle
Wet copper concentrate at 10%–18% moisture enters the inclined rotary drum through a sealed screw feeder. The drum sits at a 2°–4° tilt and rotates at 1.5–6 RPM. Inside, our proprietary low-temperature sulfide-safe lift flights — operating in a controlled 150°C–380°C range — scoop and cascade the material through a curtain of hot air. This temperature ceiling is not arbitrary. In copper smelting practice, feed moisture above 0.5% creates a steam film around particles that blocks the smelting reaction, while drying temperature above 380°C triggers desulfurization that robs the concentrate of copper value. Our intelligent temperature profiling system enforces both limits simultaneously.
Hot air enters from the discharge end, creating a counter-current flow where the hottest gas meets the driest material. This counter-current arrangement achieves 70%–76% thermal efficiency. But here is where the energy-saving architecture diverges from every conventional design.
The moisture-laden exhaust gas exiting the feed end does not go straight to the baghouse. It first passes through a primary cyclone, then into a high-efficiency plate heat exchanger. In this exchanger, the exhaust gas — still carrying 80°C–120°C of usable heat — transfers thermal energy to two streams: the incoming combustion air (preheated from ambient to 200°C–300°C before it reaches the burner) and the incoming wet concentrate feed (preheated from ambient to 60°C–90°C before it enters the drum). This dual-stream heat recovery is the core of the energy-saving design. At 30TPH capacity with 14% inlet moisture, this preheating alone reduces natural gas consumption by approximately 18%–25%, translating to roughly 170–235 cubic meters of gas per hour instead of the 210–300 cubic meters a conventional open-cycle dryer would burn.
After the heat exchanger, the cooled exhaust gas enters the cyclone-baghouse dust recovery system. Tailings dust emission stays below 15 mg/m³. Because copper concentrate drying releases SO₂ from pyrite decomposition — a challenge gold concentrate drying does not face — our system includes a bolt-on wet or dry SO₂ scrubber module that reduces stack SO₂ to below 100 mg/m³, meeting China GB16297 and EU Industrial Emissions Directive requirements.
The dried concentrate exits through an airtight rotary valve. An optional cooling drum follows. The entire process runs under slight negative pressure.
Additionally, the system incorporates a dynamic dry-ore-bin level management function. Real-time moisture sensors monitor the material bed inside the drum. When moisture drops to target, the PLC automatically reduces burner output and drum speed, rather than running at full capacity until a timer expires. This demand-responsive control — proven in copper smelting operations to reduce steam consumption by over 3.5 million cubic meters per year in a single installation — eliminates the single biggest source of energy waste in industrial drying: running at full power when you do not need to.
Product Features
Dual-Stream Thermal Recovery Loop — The 18%–25% Fuel Saver
Every conventional copper concentrate dryer vents 80°C–120°C exhaust gas directly to atmosphere. That is burned money. Our system routes exhaust through a plate heat exchanger that simultaneously preheats combustion air and preheats incoming wet feed. This closed-loop recovery cuts fuel consumption by 18%–25% without adding a single moving part. In a verified installation at a major copper smelter, replacing a conventional dryer with this thermal recovery architecture saved 3.5 million cubic meters of natural gas annually — equivalent to roughly 9 million yuan in cost reduction after fuel costs.
Sulfide-Safe Low-Temperature Drying — Protect Copper Grade at Source
Copper concentrate contains chalcopyrite, bornite, and pyrite — all of which oxidize above 380°C, dropping copper grade by 2%–5% and spiking desulfurization rate above the 0.3% smelting tolerance. Our intelligent PID temperature profiling system uses multiple thermocouples along the drum length to enforce a staged heat curve, capping every zone at 380°C maximum. This is not a marketing claim — it is a metallurgical requirement borrowed directly from flash smelting feed preparation, where feed moisture must stay below 0.3% and desulfurization must stay below 0.3% or the entire smelting reaction suffers.
Demand-Responsive Intelligent Control — Stop Burning When You Do Not Need To
Most dryers run at full burner output regardless of actual moisture content. Ours uses real-time in-drum moisture sensors feeding data to the Siemens S7-1500 PLC. When target moisture is reached, the system automatically throttles burner output and reduces drum speed. This dynamic control strategy — modeled on proven copper smelting dry-ore-bin management systems that cut steam consumption by over 0.0029 tonnes per tonne of ore — eliminates energy waste from over-drying. In practice, this reduces daily fuel consumption by an additional 8%–12% on top of the thermal recovery savings.
SO₂ Scrubber Ready — Because Copper Is Not Gold
Gold concentrate drying produces clean exhaust. Copper concentrate drying produces SO₂. Our system comes standard with a two-stage dust collector and offers a bolt-on wet or dry SO₂ scrubber. This means you can operate in Chile, Peru, Zambia, or any jurisdiction with strict sulfur emission limits — right out of the box. We have helped over 180 overseas clients pass environmental audits with this configuration.
99.5%+ Copper Recovery in Closed-Loop Dust System
At 30TPH, a conventional dryer loses 15–60 grams of copper per hour in stack dust. At current copper prices exceeding $9,000 per tonne, that is thousands of dollars per month going up the chimney. Our micro-negative pressure enclosure plus cyclone-baghouse system recovers 99.5%+ of all entrained particles and routes them back to finished product.
Zero Cage Mill — No Rotor Replacement Every Two Weeks
Conventional air-flow copper concentrate dryers use a cage mill spinning at 250–300 RPM to break up sticky concentrate. The rotor hammers wear through every 2 to 3 weeks, requiring shutdown and weld repair. Our rotary drum design eliminates the cage mill entirely. The low-temperature lift flights perform gentle derustling inside the drum with no high-speed rotating parts exposed to abrasive sulfide concentrate. Maintenance intervals stretch to months.
Six-Fuel Flexibility for Global Deployment
Natural gas, diesel, LPG, heavy oil, steam, thermal oil — the burner auto-adjusts combustion parameters for each fuel type. Operators simply select the fuel. The PLC handles the rest.
Universal Voltage Compatibility
220V, 380V, 415V, 440V, 480V at both 50Hz and 60Hz. No transformer needed. Plug in and run.
Containerized Shipping — 2 to 3 × 40HQ
Six modular sections: feed, drying, discharge, burner, dust collection, control. Each in a wooden crate. Complete plant loads into 2 to 3 forty-foot high-cube containers. On-site assembly in 7–10 days.
72-Hour Factory Burn-In Test
Every machine runs continuously under full load for no fewer than 72 hours before shipping. Drum balance, flight alignment, burner stability, PLC logic, dust collector pulse cycles — all documented.
Direct Factory Pricing
Buying from us means buying from the people who weld the steel, cast the flights, and program the PLC. There is no trading company markup, no agent commission, no distributor margin. Your investment goes entirely into Q245R steel, Mn13 alloy castings, 95% alumina ceramic tiles, Siemens PLCs, dual-stream heat exchangers, intelligent PID control, and 10,000-hour wear life.
Lead Time & Quality Assurance
Industry average for custom copper concentrate dryer: 60–90 days. Our standard model ships in 15 days. Custom configuration: 30–45 days. Every machine passes a 72-hour continuous full-load test before packing.
Get Your Custom Proposal Within 24 Hours
Send us your concentrate specs — copper grade, moisture content, sulfur content, particle size distribution, target outlet moisture, local fuel type, site voltage, and plot dimensions. Our engineering team will deliver a complete technical proposal with equipment layout, process flow diagram, thermal recovery calculation, and commercial quotation within 24 hours. Factory direct. Zero middleman. Contact us now to schedule your factory visit.
Technical Specifications
| Product Specs (m) | Capacity (T/H) | Main Motor Power (kW) | Main Motor Model | Main Gearbox Model | Ratio |
| φ1.2×10m | 2.5 | 7.5 | Y160M-R3 | ZL50-16-1 | - |
| φ1.5×12m | 3.3 - 4.9 | 10 | Y160L-6B3 | JZQ500-III-2F | - |
| φ1.5×15m | 4 - 6 | 18.5 | Y200L-6 | JZQ500-III-2F | - |
| φ1.8×12m | 4 - 6 | 11 | Y200L-6 | ZQ50-16II-2 | 16.46 |
| φ2.2×12m | 7 - 12 | 18.5 | Y160L-6 | JZQ650-III | 31.5 |
| φ2.2×14m | 7 - 12 | 18.5 | Y160L-6 | JZQ750-III | 31.5 |
| φ2.2×16m | 12 | 30 | Y225M-6 | JZQ750-III | 31.5 |
| φ2.4×14m | 12 | 30 | Y250M-6 | JZQ750-III | 31.5 |
| φ2.4×18m | 10 - 13 | 37 | Y250M-6 | ZL85-13-1 | 27.16 |
| φ2.4×20m | 10 - 14 | 37 | Y250M-6 | ZL85-13-1 | 27.16 |
| φ3×20m | 25 | 55 | Y250M-4 | ZL100-16-1 | 41.52 |
| φ3×25m | 32 - 36 | 75 | YR280M-4 | ZL100-16-1 | 41.52 |
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