Method of using a suspension smelting furnace, a suspension smelting furnace, and a concentrate burner

A suspension smelting furnace comprising a reaction shaft, an uptake, a lower furnace and a concentrate burner;

• whereby the concentrate burner comprises
• fine solid matter supply device comprising a feeder pipe for feeding fine-grained solid matter into the reaction shaft, wherein a mouth of the feeder pipe opens in the reaction shaft,
• a diffusion device, which is arranged concentrically inside the feeder pipe and which extends to a distance from the mouth of the feeder pipe inside the reaction shaft, and which comprises diffusion gas holes for directing diffusion gas around the diffusion device to fine solid matter that flows around the diffusion device;
• and
• a first gas supply device for feeding a first gas into the reaction shaft, the first gas supply device opening in the reaction shaft through a first annular discharge opening that concentrically surrounds the feeder pipe for mixing first gas that discharges from said first annular discharge opening with fine solid matter which discharges from the feeder pipe in the middle and which is directed sidewards by means of diffusion gas;
• wherein
• the concentrate burner comprises a second gas supply device for feeding second gas into the reaction shaft, the second gas supply device comprising a second annular discharge opening, which is concentric with the first annular discharge opening of the first gas supply device of the concentrate burner and which opens in the reaction shaft of the suspension smelting furnace for feeding second gas into the reaction shaft,
• comprising a first source for supplying the first gas supply device, and
• comprising second source for supplying the second gas supply device, wherein the second source is separated from the first source.