Hard coke

When evaluating Hard Coke, the most critical parameters are Fixed Carbon content (typically >86%), Ash content (<12-12.5%), and Sulfur content (<0.6-0.8%). For metallurgical applications, you must also verify the Coke Reactivity Index (CRI) and Coke Strength after Reaction (CSR), as these determine the coke's ability to support the ore burden in a blast furnace without crumbling.

Specify the granularity or size fraction (e.g., 25-80mm for blast furnaces or 10-30mm for nut coke). Request a sieve analysis report to ensure the percentage of 'fines' (undersized particles) is kept to a minimum, usually under 5%, to prevent clogging and ensure optimal gas permeability in your furnaces.

Suppliers should adhere to ISO 9001 for quality management. For international trade, ensure the product meets ASTM (American Society for Testing and Materials) or GB/T (Chinese National Standards) for metallurgical coke. Always demand a Certificate of Analysis (COA) from an independent third-party inspector like SGS or CCIC before the cargo leaves the port.

Hard Coke is primarily used as a reducing agent and fuel in blast furnace ironmaking. It is also essential in foundries for melting iron, in the production of ferroalloys, and as a carbon source in the chemical industry for manufacturing calcium carbide or phosphorus.

Hard Coke is prone to moisture absorption and mechanical breakage during loading and unloading. Ensure your contract specifies a maximum moisture limit (usually <5%) at the discharge port. Use Incoterms like FOB or CFR and hire an independent surveyor to monitor the loading process to prevent the inclusion of dust and debris.

Coke prices are highly sensitive to coking coal raw material costs and environmental policies. To secure better rates, consider long-term off-take agreements rather than spot purchases. On platforms like Made-in-China.com, look for suppliers located near major coal hubs (like Shanxi province) to reduce inland logistics costs, which can account for a significant portion of the final price.

Given the high transaction value of bulk commodities, always use Irrevocable Letters of Credit (L/C at sight). This ensures that payment is only released when the supplier presents valid shipping documents and a third-party quality inspection certificate. Avoid 100% T/T advance payments for new suppliers.

Be aware of export quotas or environmental taxes imposed by the exporting country, as these can suddenly impact supply. For shipping, Hard Coke is usually transported in Bulk Carriers. Ensure the vessel is clean and dry, and verify if your destination country has specific decarbonization or carbon border adjustment taxes (like EU's CBAM) that might apply to carbon-heavy imports.