Natural gas furnace rock wool production line

1. Product Overview
The natural gas furnace rock wool production line uses natural gas as the main heat source. Compared with traditional oil-fired and electric furnaces, it offers lower operating costs, higher thermal efficiency, and reduced pollutant emissions.
The entire production process is coordinated and managed by an automated control system, enabling visual operation and remote diagnostics from raw material batching to final packaging, ensuring product consistency, operational efficiency, and ease of maintenance.
Against the backdrop of high-quality industrial development, carbon neutrality policies, and rapid growth in green energy-saving construction, the natural gas furnace rock wool production line is gradually replacing outdated equipment and becoming the preferred solution for new insulation material factories.

2. Production Process
The complete process flow includes:
Raw Material Handling and Conveying: Basalt, diabase, and other natural minerals are crushed to 5–25 mm particles by jaw and hammer crushers. Multi-layer vibrating screens remove impurities, ensuring consistent purity and particle size. Automated weighing and screw conveyors accurately deliver the materials into the furnace.

Natural Gas Melting Furnace System: High-efficiency combustion of natural gas combined with air preheaters and combustion chamber mixers achieves furnace temperatures of 1450–1600℃. The furnace lining is made of refractory castables and high-alumina bricks, ensuring a service life over 8 years. Multi-point temperature control and thermal efficiency monitoring ensure stable molten slag output.

Fiberizing and Blowing System: High-speed centrifugal fiberizers stretch molten slag into continuous fibers of 2–6 μm diameter. Simultaneous spraying of phenolic or formaldehyde-free binders and dust-proof oils improves fiber bonding and anti-powdering performance.

Settling and Mat Forming System: Fibers are guided by cooling airflow into a settling chamber and layered with a pendulum mechanism to form an even initial mat. Multiple rollers compress to the required density with online thickness monitoring.

Curing and Forming System: Mats enter a zoned hot air curing furnace with 5–7 temperature zones, heating to 180–250℃ to cure the binder. High thermal efficiency and waste heat recovery reduce energy consumption.

Cooling and Cutting: Cooling by air or water ensures dimensional stability. An intelligent cutting system allows flexible size settings with automatic batch cutting and production memory.

Automatic Packaging and Palletizing: Finished products undergo online weighing and surface inspection, followed by packaging via PE shrink wrap, vacuum compression, palletizing, and labeling.

3. Equipment Composition

Ø Raw material crushing and screening: Improves melting efficiency and furnace life.

Ø Automatic weighing and conveying: Ensures precise feeding with minimal manual intervention.

Ø High-efficiency natural gas furnace: Equipped with temperature, flame, and exhaust monitoring.

Ø High-speed centrifugal fiberizer: Maintains fiber uniformity and includes wear-resistant cooling.

Ø Binder spraying and atomizing device: Controls glue quantity to prevent board brittleness.

Ø Pendulum settling and pre-compression: Forms the board mat layer with precise thickness.

Ø Multi-zone hot air curing furnace: Ensures product density and durability.

Ø Cooling system: Releases stress and stabilizes structure.

Ø Cross and longitudinal cutting: Enables customizable board sizes with ±2 mm accuracy.

Ø Packaging and palletizing line: Fully automated wrapping and labeling.

Ø Central PLC control system: Remote monitoring, layered permissions, production reports, and online alarms.

Ø Environmental dust removal and waste heat recovery: Meets VOC and particulate emission standards.

4. Intelligent and Eco-friendly Features

A. Real-time monitoring of equipment status, temperature, gas flow, and consumables.

B. Automatic alarms with remote diagnostics and maintenance support.

C. Data statistics, batch tracking, and automated production reporting.

D. Emission control systems include desulfurization, denitrification, bag filters, and activated carbon adsorption, complying with Chinese and EU environmental standards.

E. Waste heat recovery utilizes exhaust heat for drying and air preheating, achieving over 20% heat recovery.

5. Project Cases

①　Kazakhstan Aktau Insulation Plant: Annual 10,000 tons production line mainly serving oil and gas industry. Operating cost reduced by 25% compared to oil-fired furnace. Products meet EN13162 standards, exported to Russia and Turkey.

②　Zhejiang Energy-saving Materials Upgrade: Replaced old electric furnace with natural gas system in 2022. Capacity increased 40%, product compressive strength improved to 40 kPa, customer satisfaction significantly enhanced.

6. Maintenance and Operation Guidelines

✅ Daily inspection: Furnace lining, fiber disks, cutting tools, and electrical connections.

✅ Periodic maintenance: Centrifugal wheel every 3 months, weighing and temperature systems every 6 months, flue gas purification annually.

✅ Safety management: Install gas leak alarms, dual safety valves on burners, and fire protection systems.

7. FAQ

Q1: Is the natural gas furnace more energy-efficient than oil-fired?
A1: Yes, natural gas burns cleaner and has higher heat value, reducing average energy consumption by 10–20%.

Q2: Can board density and thickness be changed?
A2: Yes, via programmable controls supporting multiple production specs.

 
Q3: Does gas pressure instability affect production?
A3: Recommended to add pressure stabilizers and buffer tanks; system tolerates ±5% fluctuations.

 
Q4: Is remote monitoring available?
A4: Yes, with network modules for real-time status and alerts on PC/mobile.

 
Q5: What support is available for overseas projects?
A5: English/Russian technical docs, video guides, onsite engineers, and training.

This production line is a green, clean, efficient, and highly automated system widely used in industrial, construction, energy, and transportation sectors. It aligns with energy-saving and green manufacturing trends, improving product quality, production efficiency, and compliance with increasingly stringent environmental regulations.

For detailed technical plans, layouts, or project quotes, please contact our technical team for a customized solution.