This equipment is used to melt the basalt rock and auxiliary materials for the production of rock wool, after heating and holding, by controlling the temperature and flow of the slurry transported to the centrifuge, the production of rock wool products.
Electric furnace equipment composition:
1. Raw material drying system.
2. Automatic feeding system.
3. Automatic blanking system.
4. Electric furnace body melting system.
5. Electric furnace power supply high voltage system.
6. Automatic control operating system.
7. Grouting port control device.
8. Circulating cooling water system.
9. Electric furnace hydraulic system.
10. Electric furnace insulation material.
11. Electric furnace environmental dust removal system.
Cold slag rock wool electric furnace mineral wool insulation flow chart:
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Advantages of DC electric furnace treatment of solid waste :
1. Dc arc heat concentration is fast and effective, suitable for high melting point products smelting;
2. The electrode lifting control adopts PLC frequency conversion control to achieve double closed-loop control of current and voltage;
3. Dc arc furnace natural power factor is high, without compensation, the power factor can reach 0.9 or more;
4. The electrode consumption is 30%-50% of the AC electric furnace, and has low flicker effect and noise;
5. Multi-electrode power supply. It can effectively solve the problem of non-conductive charge.
A rock wool electric furnace is core thermal equipment for the rock wool production line, dedicated to melting natural raw materials (such as basalt, diabase, and blast furnace slag) into molten magma at high temperatures, which is then processed into rock wool products with thermal insulation, fireproof, and sound-absorbing properties.
Rock wool electric furnaces are mainly divided into two types according to the heating method, both relying on electrical energy to achieve high-temperature melting:
- Electrode Type Rock Wool Electric Furnace
This is the most widely used model in industry. It uses graphite or self-baking electrodes to insert into the raw material layer. After energization, the high-resistance raw materials generate Joule heat through the electrode current, gradually heating the materials from the inside out to 1450–1600℃ until they melt into a uniform magma. The furnace adopts a closed or semi-closed structure to reduce heat loss, and the molten magma is discharged through a tapping port at the bottom of the furnace.
- Induction Type Rock Wool Electric Furnace
It uses electromagnetic induction principle: the alternating current passing through the induction coil generates a changing magnetic field, which induces eddy currents in the conductive raw materials, and the eddy current thermal effect realizes material melting. This type has fast heating speed and uniform temperature distribution but is suitable for small and medium-sized production lines due to higher equipment costs.
- Environmental Protection & Low Carbon: Uses clean electrical energy as the heat source, without burning fossil fuels, which fundamentally reduces emissions of sulfur dioxide, nitrogen oxides, and dust, meeting green production standards.
- Stable Melting Quality: Precise temperature control (±10℃) ensures uniform magma composition and stable viscosity, laying a foundation for high-quality rock wool fiber formation.
- Flexible Raw Material Adaptability: Can melt a variety of raw materials such as basalt, slag, and dolomite, and adjust the raw material ratio according to product requirements to produce rock wool with different performance indicators.
- High Energy Efficiency: The closed structure and optimized heating mode reduce heat loss, with energy utilization rate 15–20% higher than that of traditional fuel melting furnaces.
