Zinc Oxide Rotary Kiln (Waelz Kiln)
- Production capacity: 180 t/d – 800 t/d
- Raw materials: Zinc concentrate, zinc sludge, zinc tailings, zinc-bearing flue dust, steel plant dedusting dust, electric arc furnace (EAF) dust.
- Product specifications: Ø2.5 × 40 m – Ø3.0 × 60 m
- Slope: 3% – 4%
- Customized Solutions
- One-Stop After-Sales Service
- Genuine Parts Supply
Industrial Zinc Oxide Rotary Kiln (Waelz Kiln) Solution
The industrial zinc oxide rotary kiln (Waelz kiln) is a type of high-temperature rotary kiln equipment specifically designed for zinc oxide production and the recovery of zinc-bearing resources. As a leading Waelz kiln, it is perfectly suited to the Waelz process. The zinc oxide rotary kiln can efficiently process over 80% of the world’s zinc waste. Zinc recovery rate ≥92%; the daily output range is 180t-800t. Industrial zinc oxide rotary kiln (Waelz kiln) has mature, energy-efficient, and reliable technology. We not only offer durable and efficient zinc oxide rotary kiln (Waelz kiln). We can also provide a customized, turnkey industrial zinc oxide rotary kiln (Waelz kiln) solution that integrates raw material preparation, calcination, and dust removal.
Core Technical Advantages of the Zinc Oxide Rotary Kiln (Waelz Kiln)
Recovery Rate Increases by 5–10%
The kiln structure and process of the zinc oxide rotary kiln have been optimized. The recovery rate increases by 5–10%, and the overall zinc recovery rate can reach over 90%.
Production Capacity: 180 t/d – 800 t/d
AGICO’s zinc oxide rotary kiln (Waelz kiln) supports 24-hour continuous production. The daily processing capacity can reach 180 tons – 800 tons. Stable operation, low failure rate.
Good Sealing Performance
AGICO’s zinc oxide rotary kiln (Waelz kiln) employs overlapping scale-type sealing and composite graphite block sealing technologies. Increase production efficiency and reduce energy consumption.
Energy Consumption is Reduced by 15%
The zinc oxide rotary kiln (Waelz kiln) uses waste heat from kiln-end flue gas to dry the raw materials. Overall energy consumption is reduced by 15%. It effectively reduced fuel costs.
Comprehensive System Auxiliary Equipment
The feeding system is responsible for continuously conveying raw materials. Ensure that zinc-bearing raw materials and auxiliary materials are fed into the zinc oxide rotary kiln in specific proportions. The main equipment includes a disc feeder, a granulator, and a bucket elevator conveyor.
Zinc Oxide Rotary Kiln
Zinc oxide rotary kiln is the core equipment of the entire system. The drying, preheating, reduction, and volatilization reactions of the materials are carried out under high-temperature conditions. It uses an inclined cylinder with a slope of 3%-4%. The lining is composed of refractory bricks and refractory castable.
Kiln Burner System
The kiln burner is installed at the kiln head. You can use fuels such as pulverized coal, natural gas, or heavy oil according to local conditions. Provide a stable and efficient heat source for the zinc oxide rotary kiln.
Dust Removal System
The dust removal system can efficiently collect zinc oxide dust and then purify the exhaust gas. Frequently used equipment includes baghouse dust collectors, industrial cyclone dust collectors, and esp electrostatic precipitator.
Packaging System
The collected zinc oxide powder will be conveyed to the finished product silo. Our jumbo bag packing machine ensures an efficient packaging process. Designed specifically for large-capacity packaging.
Process Flow of the Zinc Oxide Rotary Kiln (Waelz Kiln)
1. Raw material processing: The raw materials are crushed, sieved, and dried. An automatic batching system is used to thoroughly mix the raw materials and reducing agents in the specified proportions. Ensure the reaction remains stable afterward. Sometimes, it also needs to be processed into 8–15 mm granules. The material is fed into the zinc oxide rotary kiln using a conveyor system.
2. Calcination: The temperature inside the zinc oxide rotary kiln is 1000～1200℃. The kiln body rotates slowly, and then the material continuously tumbles forward. The materials are drying, preheating, reduction, and volatilization in this process.
3. Flue gas oxidation and cooling: Zinc vapor comes into full contact with air in the flue, and zinc oxide particles are formed. The high-temperature flue gas then enters the cooling system to cool down.
4. Zinc oxide collection: The cooled flue gas then enters dust collection equipment such as baghouse dust collectors. The zinc oxide powder is collected into the finished product silo. Exhaust emissions are ensured to meet environmental standards.
5. Finished product packaging: Zinc oxide products are stored, weighed, and then automatically packaged or transported in bulk. It can be used directly for sale or further refined.
Zinc Oxide Rotary Kiln vs. Waelz Kiln: Which One Do You Need?
AGICO’s Recommendation:
Plan A
If you are a mine owner or a chemical company. Your raw materials are natural zinc ore or various zinc-bearing materials. You wish to build a zinc oxide production line. AGICO recommends choosing the standard zinc oxide rotary kiln.
Plan B
If you are a steel mill or solid waste treatment company. Your raw materials are mainly electric arc furnace dust (EAF Dust), zinc ash, zinc slag, or other zinc-containing metallurgical waste. You want to improve zinc recovery rate and achieve resource recycling. AGICO recommends choosing the Waelz kiln.
——Unsure which device is right for your budget? Please contact AGICO immediately, and our chief engineer will customize a complete technical solution for you within 24 hours.
Technical Parameters
| Model（m） | Diameter（m） | Length（m） | Slope（%） | Capacity（t/d） | Rotating speed（r/min） | Motor power（kw） | Total weight（t） |
|---|---|---|---|---|---|---|---|
| Φ2.5×40 | 2.5 | 40 | 3.5 | 180 | 0.44-2.44 | 55 | 149.61 |
| Φ2.5×50 | 2.5 | 50 | 3 | 200 | 0.62-1.86 | 55 | 187.37 |
| Φ2.5×54 | 2.5 | 54 | 3.5 | 280 | 0.48-1.45 | 55 | 196.29 |
| Φ2.7×42 | 2.7 | 42 | 3.5 | 320 | 0.10-1.52 | 55 | 198.5 |
| Φ2.8×44 | 2.8 | 44 | 3.5 | 450 | 0.437-2.18 | 55 | 201.58 |
| Φ3.0×45 | 3 | 45 | 3.5 | 500 | 0.5-2.47 | 75 | 201.94 |
| Φ3.0×48 | 3 | 48 | 3.5 | 700 | 0.6-3.48 | 100 | 237 |
| Φ3.0×60 | 3 | 60 | 4 | 800 | 0.3-2 | 100 | 310 |
Why Choose AGICO’s Zinc Oxide Rotary Kiln (Waelz Kiln)
- Powerful customization capabilities:
AGICO can help you customize solutions based on your raw material composition, local energy sources, and production capacity requirements. Does not use a generic template.
- Strict manufacturing standards:
All components are made of high-quality materials. All critical welds undergo 100% non-destructive testing. Ensure the equipment does not deform during continuous operation under high temperature and heavy load.
- One-stop turnkey service:
AGICO does more than just sell a zinc oxide rotary kiln (Waelz kiln); we have the capability to build entire production lines. Includes equipment design, equipment manufacturing, on-site installation, and system commissioning.
