TT-D22 Model Coke Reactivityand Post-Reaction Strength Testing Device
I. Product Introduction:
Our company's Coke Reactivity and Post-Reaction Strength Testing Device is designed based on GB/T4000-2017 《Test Method for Coke Reactivity and Post-Reaction Strength》. It is available in multiple models including top-loading single furnace and bottom-loading double furnace. The equipment has a high degree of automation and stable test data, solving key factors affecting the accuracy of coke reactivity data: ① the dynamic constant temperature zone is long enough; ② the gas flow is accurate enough; ③ the specific surface area consistency of coke balls.
II. Product Function:
The thermal reactivity and post-reaction strength of coke are important indicators of its high-temperature metallurgical performance. Coke with good reactivity can promote indirect reduction in the upper-middle part of the blast furnace and release a certain amount of heat, which is beneficial for reducing the coke ratio. Coke with poor reactivity leads to excessive direct reduction in the lower-middle part of the blast furnace, absorbing a large amount of heat, thereby increasing the coke ratio and raising the smelting cost.
The post-reaction strength index of coke directly reflects whether the coke can still play a skeleton support role under the huge pressure of the charge column in the lower-middle part of the blast furnace. Therefore, the testing of coke thermal reactivity and post-reaction strength is an important means to inspect coke quality and can provide important production operation basis for the blast furnace smelting process.
III. Technical Features:
1. All adopt three-stage temperature control as required by the latest national standard, with a dynamic constant temperature zone ≥300㎜, far superior to the 150㎜ required by the national standard, resulting in more stable data.
2. Adopting new thermal insulation furnace lining, energy consumption reduced by more than 30%. The heating wire is imported from Sweden with a lifespan of over 1000 furnace runs, meeting the needs of one year's use without frequent replacement. The furnace chamber adopts a three-stage design, and the upper, middle, and lower sections can be replaced individually, greatly reducing spare parts costs.
3. Adopting Siemens PLC (S7-200SMART) control system from Germany, with high reliability, strong anti-interference ability, and stable operation.
4. High-temperature-resistant alloy reactor made of high-temperature alloy steel, with a service life of over 100 furnace runs (most other brands are 30-50 furnace runs). It can reduce the consumable material of the equipment by ¼.
5. Gas adopts high-precision (Horiba) mass flow controller, with monitoring and alarm for both high and low pressure. Dual furnace equipment has the function of automatically switching to another gas cylinder when gas pressure is insufficient. Even under unattended conditions, the equipment can operate normally.
6. The test furnace uses a single three-core thermocouple for temperature measurement, monitoring the temperature of the heating element and the upper, middle, and lower sections of the sample in real time.
IV. Technical Parameters:
Gas Flow Control
1. Automatic switching between CO2 and N2, automatic flow adjustment. Flow and gas switching are fully automatic, and CO2 heating is fully automatic;
2. Gas flow calibration: default standard calibration; maximum flow: 10L/min【CO2】; 10L/min【N2】;
3. Response time: gas characteristic: 1-2s; electrical characteristic: 1s;
4. Pressure resistance: 1MPa;
Temperature Control Cabinet
1. Control instrument cooling method: air cooling (built-in intelligent fan), quasi-silent mode;
2. Noise: when air cooling is working: approx. 40-45dB when air cooling stops: 0dB;
3. Temperature control range: 0℃-1200℃, accuracy: class 0.5;
4. Fully automatic temperature control, intelligent fuzzy PID algorithm, improving temperature control accuracy;
5. Operating voltage: AC 380V ±10%;
6. Total power: ≤12KW;
7. Maximum control temperature: 1200℃;
8. Furnace temperature control accuracy: ±1℃;
9. Control mode: computer control;
10. Control instrument dimensions: L×W×H=300×500×600mm;
11. Control instrument weight: ≤20kg.
High Temperature Heating Furnace
1. Furnace body material: 304 stainless steel;
2. Furnace body dimensions: Φ600mm×850mm;
3. Lining material: zirconium-containing ceramic fiber;
4. Lining dimensions: Φ360mm×Φ160mm×760mm;
5. Maximum heating temperature of heating element: 1200℃;
6. Thermocouple: rhodium-platinum thermocouple (Type S);
7. Heating furnace power supply: AC380V ±10%;
8. Total power: ≤12KW;
9. Constant temperature zone range: when the furnace chamber temperature is maintained at 1100±5℃, the axial constant temperature zone of the furnace chamber is ≥200mm;
10. Lifting device stroke: 700mm; lifting device load capacity: not less than 20kg;
11. Total furnace weight: ≤180kg.
Sieve
Round hole sieve: Φ10, 23mm, 25mm.
Type I Drum
1. Rotation speed: 20r/min±1r/min;
2. Drum controller: total revolutions 600r, time 30min±1min;
3. Drum body: made of seamless steel pipe with outer diameter 140mm, thickness 5mm-6mm. Net length of drum: 700mm, drum cover thickness: 5mm-6mm;
4. Real-time digital display;
Computer Control
1. Fully automatic control;
2. Supports user self-programming. Especially suitable for research experiments of this project;
3. Self-diagnosis function. It can self-judge common system faults and give alarms and corresponding error prompts
