System and method for recovering sulfur in copper smelting process

A system for recovering sulfur in a copper smelting process, comprising a proportioning bin, a dryer, a matte smelting furnace, a settling chamber, an electric furnace, a matte converting furnace, a slow ash cooler, a pyro-refining anode furnace, a conditioner, a dust removal device, a first flue gas cooler, a fluidized bed carbothermic reduction tower, a feed hopper, a high temperature separator, a reducing gas cooler, a fine dust filter, a sulfur recovery device, a sulfur storage tank, a desulfurization tower, a dust collector, a chimney, a desorption tower, a nitrogen making machine, and a second flue gas cooler,

• wherein the bottom of the proportioning bin is connected to the dryer, the dryer is connected to the matte smelting furnace by a conveyor belt, the lower part of the matte smelting furnace is connected to the settling chamber, and a solid outlet of the settling chamber is connected to the electric furnace, the slow ash cooler, and the matte converting furnace respectively;
• the matte converting furnace is connected to the slow ash cooler by a pipe and connected to the pyro-refining anode furnace by a crude copper conveyor belt, the flue gas passing through the flue gas pipe is mixed with the flue gas passing through the settling chamber and then the mixed flue gas sequentially passes through the conditioner, the first dust removal device and the first flue gas cooler;
• the flue gas from the first flue gas cooler and the flue gas from the desorption tower are mixed and then introduced into the fluidized bed carbothermic reduction tower, and the reaction gas from the fluidized bed carbothermic reduction tower is sequentially introduced into the high temperature separator, the reducing gas cooler, the fine dust filter, and the sulfur recovery device;
• the condensed sulfur in the sulfur recovery device is fed into the sulfur storage tank, the flue gas from the pyro-refining anode furnace is introduced into the second flue gas cooler, mixed with the reaction gas at the outlet of the sulfur recovery device and then introduced into the active coke desulfurization tower, dust is removed in the second dust removal device, and the flue gas is discharged through the chimney;
• and the saturated powder coke at the bottom of the active coke desulfurization tower is delivered to the desorption tower by the conveyor belt.