CN: Sulphuric Acid From Canadian Mines To Paper Mills

Canadian National Secures Deal to Ship Sulphuric Acid from Canadian Smelting Operations to Booming Maine Paper and Pulp Mills.

09 January, Montreal QC — Increased paper production at PAR-served Nine Dragon Paper mills at Rumford and Old Town, Maine, calls for increased sulfuric acid shipments, as well as the MNR-served Twin Rivers mill in Madawaska, Maine.

Sulphuric acid is made from sulphur dioxide (SO 2 ), a by-product of metal smelting. CN will transport the acid to customers for use in automotive, steel, power generation, battery manufacturing and oil sector producers, in addition to paper producers.

Smelting process: 01 Copper concentrate. After the concentrates are separated into different strage bins by formulation quality, they are transferred to a flash smelting furnace. 02 Flash smelting furnace. Copper concentrates melt and separate by their own reaction heat into copper matte with a grade of 65%, and slag consisting of iron oxide, silica, and other compounds. 03 Converter furnace. Separated matte is further oxidized to create blister copper with a grade of approximately 99%. 04 Anode furnace. Butane gas is blown into the anode furnace as a reductant to remove the oxygen, and further refine the blister copper to approximately 99.5% purity. 05 Anode casting wheel. Refined blister copper is poured into moulds and cast into 380 kg anode plates for electrolytic refining. 06 Refinery. Anode plates and stainless steel cathode plates are alternately set into the electrorefining cell, where DC current is supplied. Dissolved copper is electrolytically deposited on the stainless steel cathode plate. After 10 days of electrolys, the cathode is stripped from the stainless steel plate, resulting in 99.99% pure refined copper. The refined copper is cast as 80kg ingots. 07 Sulfuric acid plant. Sulfur dioxide (SO2) gas is recovered from the waste heat boiler. Electrostatic precipitators remove dust particles in the gases, which is then transferred to the sulfuric acid plant. The catalytic reaction of vanadium oxides SO2 into SO3, which is absorbed in water to yield concentrated sulfuric acid. 08 Slime treatment plant. Slime generated in the electrolytic refining process contains precious and rare metals such as gold, silver, selenium, tellurium, etc. These metals are recovered through processes in the slime treatment plant. { Pan Pacific Copper }.

Cleveland OH-based NorFalco is the largest distributor of sulfuric acid in North America. NorFalco distributes sulfuric acid derived from smelting facilities in Sudbury ON; and Rouyn-Noranda and Valleyfield QC, supporting regional metal-mining operations. NorFalco and CN have an enduring strategic partnership that was warmly acknowledged in the agreement announcement by CN President and CEO JJ Ruest and NorFalco CEO Kunal Sinha.

NorFalco northeast facilities include five sulphuric acid production sites (yellow dots) close Canadian metal-ore smelting sites. Red dots are terminals with appropriate storage facilities. Additional NorFalco distributin sites run up the Mississipi waterway, and across the Southeast. {NorFalco}.