Sodium Cyanide Manufacturing Facility

The sodium cyanide manufacturing facility

Our production facilities are recognised for their innovative design, efficiency and safety, as demonstrated by several awards for innovation and engineering excellence.

Our production capacity, currently 78,000 tonnes per annum, has continued to increase in support of the growth and success of our customers.

AGR is a founding signatory of the International Cyanide Management Institute (ICMI) and is accredited under the International Cyanide Management Code. Our best practice packaging and distribution capability operates ICMC-accredited supply chains in Australia and internationally.

The manufacturing process

The solution and solid sodium cyanide plants have a strong history of reliable operation, and operate 365 days a year.

To make solution sodium cyanide, natural gas, ammonia and oxygen are mixed and filtered, and then fed into reaction vessels where the mixture contacts several layers of platinum and rhodium wire mesh, known as gauzes. The gauzes operate between 1,000-1,100 degrees Celsius, and this reaction process produces hydrogen cyanide gas (HCN).

The hydrogen cyanide is cooled before leaving a reactor. The hydrogen cyanide gas reacts with caustic soda solution (sodium hydroxide) as the gas stream passes through an absorber column, resulting in the production of sodium cyanide solution. The solution product is pumped from the plant continuously to storage tanks or directly to the solid production plant.

For solid sodium cyanide production, solution sodium cyanide is pumped into evaporating and de-watering equipment before drying in the solid production plant. The dry sodium cyanide powder is then compacted into briquettes.