The slag dry granulating thermal insulation buffer electric furnace
is a piece of high-efficiency, energy-saving and
environment-friendly industrial thermal equipment specially
developed for the harmless treatment, resource utilization and
waste heat recovery of high-temperature molten slag generated in
metallurgy, chemical industry, building materials and other
industrial production. It integrates dry granulation, thermal
insulation buffering and electric heating regulation, and provides
a reliable technical solution for green and low-carbon
transformation of industrial slag treatment.
This equipment takes high-temperature molten slag as the treatment
object, and abandons the traditional water quenching wet
granulation process to realize the whole dry operation. Under the
action of the internal mechanical or pneumatic granulation
mechanism, the high-temperature molten slag is dispersed and
crushed into uniform solid particles rapidly.
Equipped with a professional thermal insulation structure and
electric temperature control system, the furnace body can maintain
a stable high-temperature environment, playing a role of thermal
buffering. It avoids the rapid temperature drop of slag particles,
prevents slag agglomeration and bonding, and ensures the continuity
and stability of granulation. Meanwhile, the electric heating
component provides auxiliary heat compensation, so that the slag
can maintain the appropriate temperature required for granulation
and subsequent waste heat recovery, and the waste heat of
high-temperature slag can be efficiently captured and converted
into available energy such as steam and hot water.
Main Structural Features
Dry Granulation Module: The core execution unit adopts a precision
granulation structure, which can adapt to the physical properties
of different types of molten slag, and produce slag particles with
uniform particle size, good activity and high utilization value,
laying a foundation for the subsequent production of cement
admixture, concrete aggregate and other recycled products.
Thermal Insulation Buffer Furnace Body: It uses high-performance
refractory and thermal insulation materials, with excellent heat
preservation performance and low heat loss. The buffer space inside
the furnace can adjust the residence time of slag, balance the
fluctuation of slag incoming flow, and match the rhythm of
front-end smelting and back-end collection and transportation.
Electric Heating & Temperature Control System: Driven by electric
energy, it realizes accurate and stepless adjustment of
temperature. Equipped with an automatic control system, it can
monitor key parameters such as furnace temperature, granulation
speed and slag flow in real time, automatically adjust operating
indicators, reduce manual intervention, and improve operation
stability.
Closed & Environment-Friendly Structure: The whole equipment is
designed with closed sealing, which can effectively control dust
emission and avoid secondary pollution. There is no large amount of
waste water and waste residue generated in the dry process, which
conforms to the national environmental protection and energy
conservation standards.
Performance Advantages
Environmental Friendly: Completely get rid of the dependence of
traditional slag treatment on a large amount of water, eliminate
the generation of waste water and harmful water vapor, reduce dust
and noise pollution, and meet the requirements of clean production.
High Resource Utilization Rate: The dry granulated slag has stable
quality and high potential hydraulic activity, which can be widely
used in building materials, road construction and other fields,
realizing the complete resource utilization of industrial solid
waste.
Energy Saving & Waste Heat Recycling: The thermal insulation buffer
structure reduces ineffective heat dissipation, and the electric
auxiliary heating is precise and controllable. Combined with the
matched waste heat recovery device, it can recycle high-quality
waste heat, reduce energy consumption of enterprises and improve
economic benefits.
Strong Adaptability & High Stability: It can be applied to blast
furnace slag, steel slag and other industrial molten slag, with
flexible operation, strong anti-interference ability, and can
realize continuous and stable operation for a long time.
Intelligent and Automated: With integrated automatic control, it
supports data recording and remote monitoring, which is convenient
for daily operation and maintenance, and helps enterprises realize
intelligent management of slag treatment.
Application Scope
This equipment is mainly used in the metallurgical industry such as
iron and steel smelting, as well as the high-temperature slag
treatment links in chemical engineering, non-ferrous metal smelting
and building materials manufacturing. It is an ideal supporting
equipment for industrial enterprises to achieve solid waste
reduction, resource utilization and carbon emission reduction.
Technical Parameters of Slag Dry Granulating Thermal Insulation
Buffer Electric Furnace
1. Basic Specification Parameters
| Item | Unit | Typical Range | Remarks |
|---|
| Model | - | Customized series | According to daily slag processing capacity |
| Daily slag treatment capacity | t/d | 2400 – 24000 | Continuous operation mode, adjustable |
| Furnace effective volume | m³ | 5 – 50 | Designed for slag residence & buffering |
| Overall dimension (L×W×H) | mm | Customized | Determined by layout and installation space |
| Equipment weight | t | 20 – 120 | Excluding auxiliary systems |
2. Operating Condition Parameters
| Item | Unit | Typical Range | Remarks |
|---|
| Inlet molten slag temperature | °C | 1300 – 1700 | Applicable for blast furnace slag, steel slag, ferroalloy slag |
| Furnace working temperature | °C | 750 – 1250 | PID automatic closed‑loop control |
| Temperature control accuracy | °C | ±5 – ±10 | Stepless electric heating adjustment |
| Slag residence time in buffer zone | min | 15 – 60 | Adjustable according to granulation requirement |
| Working pressure | MPa |
|
|
| Ambient temperature for operation | °C | -10 – 50 | Standard industrial environment |
3. Electrical & Heating Parameters
| Item | Unit | Typical Range | Remarks |
|---|
| Heating mode | - | Electric resistance heating | Built-in alloy heating elements |
| Installed heating power | kW | 1000 – 8000 | Configured based on treatment capacity |
| Operating voltage | V | 380 / 10000 | Three-phase AC, low-voltage or medium-voltage |
| Power control mode | - | Thyristor regulation / frequency conversion | Stepless adjustable power output |
| Control system | - | PLC + touch screen | Supports remote monitoring, data recording, alarm |
| Protection class | - | IP54 | For electrical cabinet and on-site instruments |
4. Granulation & Structural Performance Parameters
| Item | Unit | Typical Range | Remarks |
|---|
| Granulation particle size | mm | 0.1 – 5 | Uniform particle distribution |
| Granulation method | - | Dry mechanical / pneumatic granulation | No water quenching, zero waste water discharge |
| Refractory material | - | High-alumina brick, corundum castable | High temperature resistance, erosion resistance |
| Thermal insulation structure | - | Multi-layer composite insulation | Reduce heat loss, improve energy efficiency |
| Sealing performance | - | Fully enclosed | Reduce dust emission, meet environmental standards |
| Thermal efficiency | % | ≥75 | With insulation buffer and waste heat recovery |
| Continuous working time | h | ≥720 | Long period stable operation |
5. Auxiliary System Parameters (Matching)
- Waste heat recovery outlet temperature: 550 – 850 °C, suitable for
steam generation or hot water production.
- Dust removal efficiency: ≥99.5%, supporting bag filter or wet dust
removal system.
- Cooling mode: Natural cooling / forced air cooling for furnace
shell, surface temperature ≤60 °C.
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