Activated Carbon Manufacturing & Quality Control

Manufacturing

YICARB®® We are a leading supplier of activated carbon in China, providing first-class product quality, stable manufacturing, reasonable prices, continuous innovation, and strategic cooperation with customers. We have been focusing on this industry for over 30 years and our production network includes three manufacturing facilities in Guangdong, Jiangxi and Xinjiang provinces in China, with a total production capacity of 28000 metric tons per year.

30+

Years experience in activated carbon production

Factories operating in mainland China

28000

Metric tons annual production capacity

National High Tech Enterprise award in 2023

Factory in Guangdong Province, China

Factory in Jiangxi Province, China

Factory in Xinjiang Province, China

Laboratory

At YICARB®, quality is never an assumption—it's verified at every stage. Across the three manufacturing facilities supporting YICARB®, each facility is equipped with a fully operational on-site laboratory, enabling real-time testing and traceability from raw material intake through semi-finished intermediates to the final product. Every batch undergoes rigorous analysis against key performance indicators—including iodine number, CTC adsorption, hardness, ash content, and particle size distribution—before it ever leaves the factory floor. With a combined annual capacity of 28,000 metric tons and over 30 years of accumulated technical expertise, this triple-lab infrastructure ensures that every shipment bearing the YICARB® name meets the exacting standards demanded by gold recovery, water treatment, and air purification applications worldwide. For our customers, it means one thing: consistent, certified, audit-ready quality—without compromise.

Laboratory in Guangdong Province, China

Laboratory in Jiangxi Province, China

Laboratory in Xinjiang Province, China

QC

YICARB® quality control is supported by three dedicated on-site laboratories—one at each manufacturing site—providing full-spectrum analytical capability across the entire production chain. Our QC teams conduct both routine and specialized testing in accordance with internationally recognized standards, covering:

Specification	Standard	Test Method	What It Means for Your Operation
CTC	45-60%	ASTM D3467	Measures the carbon's capacity for medium to large organic molecules. For gold recovery, a CTC of 45–60% indicates a well-developed mesopore structure that facilitates rapid gold cyanide complex diffusion—especially critical in high-pulp-density CIL circuits.
Iodine Number	900–1200 mg/g	ASTM D4607	Total micropore volume. Higher = more surface area for gold adsorption. While YICARB manufactures coconut shell activated carbon across the full iodine spectrum from 1,000 to 2,000 mg/g, for gold recovery we specifically recommend the 1,000–1,200 mg/g range—the proven sweet spot for adsorption performance, hardness, and circuit economics.
R-Value (Kinetics)	55–75%	AARL method	Adsorption rate in 30 min. Critical for CIL circuits with short residence times. > 65% recommended for preg-robbing ores.
K-Value (Loading)	25–35 mg Au/g	Freundlich isotherm	Equilibrium loading at 1.0 mg/L Au. Critical for CIP circuits where carbon contact time is abundant. Directly impacts carbon inventory size.
Hardness	97–99.5%	ASTM D3802	Mechanical attrition resistance. Every 1% drop below 98% can increase gold-in-fines losses by 15–20%. Non-negotiable for agitated tanks.
Particle Size	5-10 mesh 6-12 mesh	Sieve analysis	Uniformity is more important than absolute size. PSD > 95% on-spec prevents screen blinding. Finer mesh = faster kinetics but higher pressure drop.
Ash Content	< 2–3%	ASTM D2866	Lower ash = less metal leaching into process water. Coconut shell carbon naturally achieves < 3%.
Apparent Density	0.45–0.55 g/mL	ASTM D2854	Reflects carbon packing and structural integrity. Consistent density ensures predictable carbon inventory weight in each tank.
Moisture Content	5-10%	ASTM D2867-91	As-shipped moisture ensures carbon is pre-wetted and ready for direct introduction into the circuit without dusting. Consistent 5–10% moisture prevents floating carbon in the first CIP tank and eliminates the need for pre-soaking before startup.