METHOD AND ARRANGEMENT FOR REMOVING OUTGROWTH IN A SUSPENSION SMELTING FURNACE

摘要

The invention relates to method and to an arrangement for removing outgrowth in a suspension smelting furnace. The suspension smelting furnace comprising a reaction shaft having a reaction shaft structure. The reaction shaft comprises at least one opening for an outgrowth removal means. The movable piston is arranged such that the movable piston can move in the opening in the reaction shaft and into the reaction shaft to push possible outgrowth in the reaction shaft.

主权项

1. A method for removing outgrowth in a suspension smelting furnace comprising a reaction shaft having a reaction shaft structure, and a concentrate burner for feeding at least reaction gas and fine solids such as copper or nickel concentrate into the reaction shaft of the suspension smelting furnace, wherein the method comprises:
providing the reaction shaft with at least one opening for an outgrowth removal means; providing at least one outgrowth removal means having a movable piston; arranging the movable piston such that the movable piston can move in the opening in the reaction shaft and into the reaction shaft; moving the movable piston into the reaction shaft to push possible outgrowth in the reaction shaft by means of the movable piston; providing a cooling block having an aperture for the concentrate burner and first fastening means for fastening the concentrate burner to the cooling block and second fastening means for fastening the cooling block at the top of the reaction shaft of the suspension smelting furnace; providing the cooling block with at least one opening for the movable piston; fastening the cooling block at the top of the reaction shaft of the suspension smelting furnace so that the cooling block is fastened to the reaction shaft structure by using the second fastening means and to the concentrate burner by using the first fastening means and so that the concentrate burner extends into the reaction shaft; providing coolant circulating means for circulating coolant fluid in at least one channel in the cooling block; circulating coolant in said at least one channel in the cooling block by feeding coolant fluid into said at least one channel and by discharging coolant fluid from said at least one channel; measuring the temperature (Tin) of coolant fluid that is fed into said at least one channel; measuring the temperature (Tout) of coolant fluid that is discharged from said at least one channel; measuring the volumetric flow (Vout) of the coolant fluid in said at least one channel; calculating the heat loss (Q) of the coolant fluid in said at least one channel in the cooling block by using the temperature (Tin) of coolant fluid that is fed into said at least one channel, the temperature (Tout) of coolant fluid that is discharged from said at least one channel, and the volumetric flow (Vout) of the coolant fluid in said at least one channel; and controlling the outgrowth removal means based on the calculated heat loss (Q).