SU1801195A3 - Furnace for continuous melting sulfide materials in molten pool - Google Patents

Description

The invention relates to metallurgical smelting furnaces, in particular to the hardware design of units such as a furnace for melting in a liquid bath, used in non-ferrous metallurgy for processing sulfide polymetallic ores and concentrates.

The purpose of the invention is to increase the compactness and reliability of the furnace and reduce the cost of its operation.

The drawing schematically shows the proposed furnace.

The furnace contains a vault 1, a charging chute 2, a hearth 3, a gas outlet 4, a shaft 5 round in horizontal section, equipped with caissons 6 and tuyeres-burners 7. The shaft 5 has a device 8 for discharging the upper phase of the melt and a siphon 9 for discharging the bottom melt phases. The siphon 9 is equipped with an inclined channel 10, which (57) Usage: in non-ferrous metallurgy. The goal is to increase the compactness and reliability of the furnace and reduce the cost of its operation. The inventive furnace contains a hearth and a round coffered mine. The mine is equipped with a device for loading material and exhaust gas. There is a device for discharging the upper phase of the melt and a siphon for discharging the bottom phase of the melt. The siphon is made with an inclined channel. The channel is located in the wall of the shaft and connects the exhaust and transfer windows. The caisson above the siphon is made shortened in height. The siphon wall is equipped with a belt of planing pipes. 1 ill.

located in the wall of the shaft 5 and connects the overflow 11 and the outlet 12 of the window. KesFon 6, located above the siphon 9, is made shortened in height, and the wall of the siphon 9 is at the same time the wall of the shaft 5 and is equipped with a belt of planes 13.

The melting process in the furnace is as follows.

After heating the furnace, the melt is melted by melting portions of the charge, loaded through the feed chute 2. Melting is carried out due to the heat from burning fuel supplied through the tuyeres-burners 7. The furnace is ready for operation when the melt level in the furnace exceeds the level of tuyere-burners 7.

The launch of the furnace can also be carried out by pouring the melt. After collecting the required amount of melt, the entire melt in the furnace is involved in intensive

Joint venture

With εν S61108L, bubbling mixing due to the supply of blast through tuyeres - burners 7 into the thickness of the melt. The fuel during heating and operation of the unit can be natural gas, pulverized coal or fuel oil supplied through tuyeres-burners 7. Melting of the starting material takes place in the melt, and due to intensive mixing of the melt, a high melting rate is achieved. The gases formed in this case are removed through openings 4 in the vault 1 and sent to the gas treatment and heat recovery system.

The melt is continuously discharged from the furnace. The upper phase of the melt is discharged through the device 8, and the bottom phase through the siphon 9. Since the wall of the siphon 9, which is also the wall of the shaft 5, is equipped with a belt of planes 13, this protects the siphon 9 from burning. The heat of the melt in the inclined channel 9 itself is sufficient to prevent it from freezing and does not require additional heating costs.

• In the present invention, the overall dimensions of the furnace are reduced, the furnace becomes more compact by placing a siphon channel in the wall of the furnace shaft; the reliability of the furnace increases due to the possibility of cleaning or thermal effects on the overflow window that communicates the siphon with the interior of the furnace, as well as by eliminating stagnant zones in the siphon chamber: reducing the cost of operating the furnace by eliminating energy costs for additional heating of the siphon for release of the bottom phase of the melt.

Claims (1)

Claim A furnace for the continuous melting of sulfide materials in a liquid bath containing a hearth, a coffered shaft with tuyeres-burners, devices for loading materials and removing gases, and a device for discharging the upper phase of the melt and a siphon for discharging the bottom phase of the 20 melt with an outlet window a window communicating the siphon with the shaft, and an inclined channel, characterized in that, in order to increase the compactness and reliability of the furnace and reduce the cost of its operation, the inclined channel is placed in the wall of the shaft, a caisson located above it , made shortened in height, and the wall of the siphon is made with a belt of planing pipes.