High-purity charcoal produced by the Lambiotte process meets the strictest requirements of metallurgy, chemistry, and advanced manufacturing.
Charcoal produced by SIFIC/CISR Lambiotte retorts consistently meets the most demanding industrial quality standards — a direct result of the controlled, continuous carbonization process.
| Parameter | Value | Standard |
|---|---|---|
| Fixed carbon content | 82–95% | Up to 95% achievable in a single cycle |
| Ash content | < 2% | Critical for silicon and chemical applications |
| Moisture | 3–4% | Consistent due to integrated drying zone |
| Fraction size | 20–80 mm | Adjustable via downstream screening |
| Aluminium content | Absent | Key requirement for silicon smelters |
| Volatile substances | Low | Controlled by carbonization temperature |
| Quality certifications | DIN+ (Germany) · EN 18606-2 (France) · GOST 7657-84 (Russia) | |
The Lambiotte process produces a chemically consistent, mechanically robust charcoal that unlocks applications unavailable to traditional kiln-produced material.
Charcoal is the preferred reducing agent for crystalline silicon smelting. The reaction SiO₂ + C → Si + CO₂ runs at 1,700–2,000 °C and requires a highly reactive carbon source with low ash and zero aluminium — properties inherent to Lambiotte charcoal. ELKEM (Norway), one of the world's largest silicon producers, consumes around 60,000 tonnes of Lambiotte charcoal per year for this purpose.
The foundry industry demands carbon with high fixed-carbon content and predictable granulometry. The Lambiotte retort can produce charcoal containing up to 95% fixed carbon in a single continuous cycle, making it a reliable source for carburizer applications in iron and steel casting. The controlled particle size eliminates the fine-dust problem that plagues batch-kiln producers.
Carbon bisulphide is produced by reacting molten sulphur with hot charcoal: C + 2S → CS₂. The process requires raw material with the lowest possible volatile-substance content and minimal ash. Particle uniformity is equally critical — fine or friable char causes process interruptions. Lambiotte charcoal satisfies all three criteria out of the same production run used for metallurgy.
High-purity Lambiotte charcoal is an ideal precursor for steam- or chemical-activated carbon. The low ash content and consistent internal pore structure yield activated carbon with high surface areas, used in water treatment, air purification, food and beverage processing, and pharmaceutical manufacturing. Starting from a controlled feedstock reduces activation time and reagent costs.
In the production of ferromanganese and ferrochrome, charcoal serves as both a reducing agent and a carburizing source. The strict requirement for low phosphorus and sulphur levels — combined with the absence of trace contaminants that would degrade alloy quality — makes Lambiotte charcoal the preferred choice over coke-derived alternatives in premium alloy production.
Charcoal's thermal insulation properties have attracted applications in the construction and materials science fields. Its absorptive characteristics support use in soil conditioning, water treatment, and specialist industrial filtration. As the global shift away from fossil carbon accelerates, Lambiotte charcoal's renewably sourced purity positions it as a drop-in substitute wherever petroleum coke or coal-derived carbon is currently used.
The critical difference between Lambiotte charcoal and product from traditional batch kilns is process control. In a SIFIC/CISR retort, carbonization temperature is monitored continuously across six zones. The charcoal exits at ambient temperature — cooled inside the furnace by the circulating gas stream — before it has any chance to re-adsorb moisture or oxidize.
Because the process is autothermic — heat comes entirely from combusting pyrolysis gases inside the retort — there is no contact between the charcoal and any fossil fuel or combustion product. The result is a chemically clean product with a fixed-carbon profile that doesn't vary batch to batch.
Industrial customers specify tight particle-size ranges. The Lambiotte process yields a hard, dense charcoal with low fines content — a direct consequence of the slow, uniform descent through the retort. Downstream screening to 20–80 mm meets the specifications of silicon smelters, foundries, and chemical processors without additional crushing losses.
A single Lambiotte 6000 line produces 16,000 tonnes of charcoal per year on a 600 m² footprint. A dual-line installation doubles output to 32,000 t/year — sufficient to serve as a dedicated industrial supplier. The continuous nature of the process means delivery schedules are predictable and quality certificates apply to every tonne, not sampled batches.