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Our Mineral Processing Coal Collector is a high-performance surfactant blend engineered for coal beneficiation. By selectively enhancing coal particle hydrophobicity, it improves flotation efficiency, reduces reagent consumption, and increases clean coal recovery. Ideal for low-rank coals (e.g., lignite, sub-bituminous), this collector addresses the challenges of high ash content (≥30%) and poor floatability caused by surface oxidation. The formulation combines fatty acid esters with synergistic co-surfactants to create a robust flotation system for modern coal processing plants.
Selective Flotation Chemistry
Proprietary C16-C18 fatty acid esters with esterification degrees >95% target coal's aromatic hydrocarbon surfaces while repelling polar mineral impurities (quartz, clay). This specificity achieves ash reduction of 15–20% in single-stage flotation, surpassing traditional diesel-based collectors (8–12% reduction).
Optimized for fine coal particles (<0.5 mm, especially 20–74 micron size fraction), improving recovery rates by 18–25% through enhanced bubble-particle attachment kinetics. The collector's HLB value of 8–10 balances hydrophobicity and dispersibility for optimal froth stability.
Low Dosage Efficiency
Requires 30–50% less dosage (100–200 g/ton coal) compared to traditional diesel-based collectors, lowering operational costs by 1.5–3.0 per ton of clean coal. Effective across a wide pH range (5–9) without pH adjustment, reducing reliance on sulfuric acid or lime (saving 0.5–1.0 kg/ton coal in reagent costs).
Environmental Compliance
Biodegradable formulation with a BOD5/COD ratio >0.3, minimizing ecological impact in tailings ponds. Meets ISO 14001 environmental management standards and complies with China's Coal Industry Pollution GB 20426-2006 for flotation reagents.
Hard Water Stability
Chelating agents in the formulation sequester divalent ions (Ca²⁺, Mg²⁺), maintaining performance in water with hardness up to 300 ppm. This feature is critical for coal washing plants in regions with limited access to soft water, such as northern China and South Africa.
Coal Types: Effective for lignite, sub-bituminous (17–24 MJ/kg), and bituminous coals (24–35 MJ/kg), including oxidized coal with surface oxygen functional groups.
Processes: Froth flotation in coal washing plants, compatible with both mechanical (Denver cell) and column flotation systems. Ideal for upgrading coal for power generation (reducing SOx emissions) and metallurgical applications (low-ash coke production).
Beneficiation Goals:
Upgrading lignite from 35% ash to <20% for circulating fluidized bed (CFB) boilers.
Reducing sulfur content by 10–15% in bituminous coal, meeting stringent emission standards for steelmaking coke.
Q: How does it compare to diesel-based collectors?
A: Offers 2x higher selectivity (coal:mineral attachment ratio), 30% lower dosage, and 50% faster froth drainage, resulting in higher throughput and lower reagent costs.
Q: What is the optimal temperature range for use?
A: Effective between 10–40°C, with peak performance at 25–30°C where bubble surface tension is minimized. In cold climates, pre-heating slurry to 20°C is recommended to maintain efficiency.
Q: Can it be used with other flotation reagents?
A: Yes, compatible with common depressants (dextrin, starch) and frothers (MIBC, polyglycol ethers). For best results, add collector 1–2 minutes after frother to ensure proper froth structure.
Q: What is the typical recovery rate improvement?
A: 15–25% increase in clean coal yield compared to conventional methods, depending on feed coal quality. In laboratory tests with 30% ash lignite, recovery reached 82% vs. 65% with diesel oil.
Q: How to handle foam overflow in flotation cells?
A: Adjust frother dosage to 5–10% lower than standard when using this collector, as its co-surfactants naturally enhance froth stability.
