Basic concept of rock wool

Rock wool is an inorganic fiber material made by melting rock and then fibrillation, which has the following characteristics:

Light weight: density of 50 to 200 kilograms per cubic meter

Excellent thermal performance: thermal conductivity of 0.029 to 0.046 watts per meter-Kelvin at room temperature

Non-flammable andproof: safe operating temperature of 600°C, excellent fire resistance

Sound absorption and noise reduction: sound absorption coefficient (1000~4000) of 0.6~0.8

Production process of rock wool and the role of blast furnace

Rock wool production process

Raw material preparation: raw materials such as basalt, slag, etc.

Material mixing and melting: high-temperature melting in the blast furnace (1450°C ±30C)

Melting and fibrillation: liquid rock wool is thrown out at high speed by the centrifuge to form long and thin rock wool fibers

Forming andifying: using a pendulum to evenly spread the cotton, and solidifying treatment under high temperature and high pressure

The core role of the blast furnace

Key equipment for: smelting ore raw materials into liquid rock wool

System composition:

Blast furnace body (with water-cooled clamping jacket furnace body, furnace bottom door,er nozzle, etc.)

Front furnace, air ring, water cooling system, chute

Technical parameters:

Melting capacity: about 7000/hour

Melt temperature: 1450°C ±30°C

Fuel: coke and ore raw materials mixed in proportion

Rock production equipment

Equipment	Technical Indicators	Functions
Blast furnace	Melting capacity 7000kg/h	Ore smelting
Four-roll centrifuge	Fiber forming accuracy ±0.5mm	Liquefied rock wool fibration
Swing hammer battening machine	Threedimensional uniform battening uniformity >95%	Uniform battening, increase density
Curing furnace system	Temperature control accuracy ±2℃	High temperature and high pressure curing m Waste gas treatment device Dust removal efficiency 99.8% Environmental protection standard emission

Application Fields of Building Material Rock Wool

1. Building Insulation

Wall and roof insulation: improve building energy efficiencyFire barrier: enhance building safety

Sound absorption materials: improve building acoustic environment

2. Industrial Applications

Pipeline and storage tank insulation: reduce heat loss and improve energy efficiency

Clean board insulation: widely used in hospitals, laboratories, etc.

Key Points of Safety in Rock Wool Production

Personal Protection

Must wear: fireproof clothing, goggles, protective gloves, dust mask

Avoid inhaling rock wool fibers (which may cause respiratory problems)

Safety in Cupola Furnace Operation

Before startup check equipment status, confirm no abnormality

During operation: monitor temperature and pressure, strictly prohibit overloading

After shutdown: clean equipment, check lubrication, record operation

Environmental Protection Requirements

Waste gas treatment: cyclone dust collector, bag filter, CO combustion, desulfurization

Waste water treatment: biological treatment method, ensure discharge

Domestic equipment achieves 60% energy saving through the utilization technology of metallurgical solid waste in 2022

Development Trends of Rock Wool Technology

Intelligentization

Introduced industrial cloud platform in 2022, realizing remote operation and maintenance of global equipment

Environmental Protection Upgrade

Planning to a further 15% reduction in natural gas consumption by 2025

Raw Material Optimization

Shaanxi Hexin Insulation has applied for a to use coal gangue to produce rock wool cupola furnace

Energy-saving and Efficiency

Domestic equipment has a market share of 85% domestically, the export volume accounts for 30% of the capacity

Rock wool, as the "star material" of modern building insulation, has the cupola furnace technology as a key in its production process, and safe operation and environmental treatment are the links that modern rock wool enterprises must pay attention to. With the progress of technology, rock wool products are developing more environmental, more efficient, and more intelligent directions, providing strong support for building energy conservation and the development of green building materials