External Heating Kiln, Carbon Black/Active Carbon Equipment, Large Rotary Kiln Manufacturer.
language：Chinese
There is friend asking me equipment configuration and model selection for 1tph positive powder slag calcining. Today Taeda will share you specific model selection and proposal design.
Project background
Ø Material source: positive powder slag after extracting lithium (FePO4+binder+C)
Ø Moisture content: 15% (free water); 20% (crystal water)
Ø Aim: calcining and eliminate binder (binder always adopted is PVDF)
Ø Calcining requirement: 650-℃, calcining time: 1h( further calcine for another 1h after eliminating free water)
Ø Material feature: powder bulk state, with average fluidity; average particle size is 3-3000um.
Ø Material bulk density: wet material: 1200kg/m3; dry material: 900kg/m3
Ø Product aim: final moisture not exceed 0.5； dry product amount: 0.7tph.
Design basis
Ø Designed capacity: 1.12t/h
Ø Whole system starts from buffer silo. Materials will pass by feeder, primary calcining furnace, secondary calcining furnace and discharging port. System contains external heating system, instrument, cabinet and automatic control.
Ø Heat source: gas heating
Ø Calcining atmosphere: air atmosphere
Model selection
Based on technical communication, considering material feature, operation convenience, adjustable parameter and compatibility, we choose TDICA0.8 and TDICA1.0 external heating calcining kiln. Please refer to 4th term for parameters and performance.
Equipment parameters
1 | Material name | Powder slag | |
2 | Input capacity | ～1.12t/h | |
3 | Slope | 1% | |
4 | Feeding mode | Screw forced feeding and speed is adjustable | |
5 | Heat source | Gas heating | |
6 | Working temperature | 300-650℃ | |
7 | Texture | Furnace pipe: ss304 | |
8 | Primary calcining kiln parameter | ||
8.1 | Furnace rotation speed | 2-7r/min，adjustable | |
8.2 | Heating zone | 3 | |
8.3 | Operation pressure and atmosphere | Micro negative pressure/micro positive pressure, air atmosphere | |
8.4 | Temperature detection (heating chamber) | 3 sets/K type | |
8.5 | Temperature detection (inside furnace duct) | 2 pcs/K type | |
8.6 | Pressure testing | With tape converter output | |
8.7 | Calcining furnace model | Φ1.0×8.0m | |
9 | Secondary calcining furnace parameter | ||
9.1 | Furnace rpm | 0.2-2r/min, adjustable | |
9.2 | Heating zone | 3 | |
9.3 | Operation pressure and atmosphere | Micro negative pressure/micro positive pressure, atmosphere | |
9.4 | Temperature detection (heating zone) | 3set/K type | |
9.5 | Temperature detection (inside furnace pipe) | 2 pcs/K type | |
9.6 | Pressure detection | With tape converter output | |
9.7 | Calcining furnace model | Φ0.8×8.0m | 9.7 |
Proposal summary
Materials are sent to primary calcining kiln through feeder and heated in the kiln. Free water and crystal water are removed. Along with rotation of kiln, materials are continuously sent to secondary calcining kiln. Materials will stay for about 1 hour inside secondary calcining kiln. Binder will melted, volatile and calcine. Then, final material will slowly move to discharging end. Fresh air needed for whole calcining process will be blown by fan. Exhaust gas produced by calcining process will be disposed by scrubbing tower. There are regulating valve set for both blowing system and Induced draft system. Valve openness and fan running frequency can be freely controlled. Exhaust gas can enter customers’ other exhaust disposal and purification equipment for further disposal before discharging to air.
TAIDA GROUP
Mobile phone：+86 18539990967
Telephone：+86 371 86565118
Email：service@tdaxy.com
Address： National Science Park, High-Tech Zone, Zhengzhou-China
