Method for producing lead bullion by means of copper dross side-blown smelting
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A copper scum, crude lead technology, applied in the field of metallurgy
Active Publication Date: 2012-08-22
YUNNAN CHIHONG ZINC & GERMANIUM
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The present invention aims at the characteristics of large processing capacity of side-blowing furnace, easy realization of automatic feeding and discharging, and good workin...
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Embodiment 1
[0022] like figure 1 shown, at 2.5m 2 In the side-blowing furnace, copper scum (Pb80%, Cu5%), soda ash, pyrite (containing S25%) are mixed according to the ratio of 100:8:6, and the temperature in the furnace is controlled at 700 °C when feeding. Feed 45 tons in 2 hours and enter the molten pool of the side-blowing furnace for reduction smelting. At the same time, the anthracite (containing 81% C, and more than 80% of which the particle size is less than 0.127mm) is uniformly blown in by high-pressure air.
[0023] The melting temperature is 700°C at the beginning, and after 2 hours, the temperature is increased to 1100°C, and after 3 hours, the metallic lead and the combined lead in the copper scum are all smelted into crude lead.
[0024] After clarification and separation for 1 hour, the crude lead and matte are first released by siphon, and then the slag port is opened to release the slag. 2 Concentration 300mg / m 3 ).
[0025] The amount of anthracite in the whole pro...
Embodiment 2
[0027] at 2.5m 2 In the side-blown furnace, copper scum (Pb60%, Cu10%), soda ash, pyrite (containing S25%) were mixed according to the ratio of 100: 10:8, and the temperature in the furnace was controlled at 800 °C when feeding. Feed 35 tons in 1 hour into the molten pool of side blowing furnace for reduction smelting. At the same time, anthracite (containing C81%) is blown evenly with high-pressure air.
[0028] The melting temperature is 800°C at the beginning, and the temperature is increased to 1100°C after 1 hour, and the metallic lead and combined lead in the copper scum are all smelted into crude lead after 2 hours.
[0029] After clarification and separation for 40 minutes, the crude lead and matte are first released by siphon, and then the slag port is opened to release the slag. 2 Concentration 280mg / m 3 ).
[0030] The amount of anthracite in the whole process is 12% of the amount of copper scum. The output of crude lead (containing Pb97.2%, Cu0.4%) was 16.7t, ...
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Abstract
The invention belongs to the technical field of metallurgy, and relates to a method for producing lead bullion by means of copper dross side-blown smelting. The method comprises the following steps of: 1) burdening copper dross, sodium carbonate and pyrite according to the proportion of 100:(8-10):(6-8), evenly feeding for 1-2 hours, wherein the feeding temperature is 600-800 DEG C, and evenly blowing anthracite by high-pressure wind; 2) smelting for 1-2 hours at the temperature of 600-800 DEG C after feeding, rising the temperature to 1100-1200 DEG C and smelting for 2-3 hours, and smelting the metallic lead and the chemical combination-state lead in the copper dross into the lead bullion; and 3) stopping blowing the anthracite, separating for 0.5-1 hour in a cleaning way, discharging the lead bullion and the copper matte in a siphon way, opening a slag hole to discharge the slag, and carrying out waste heat recovery and dust collection on the high-temperature smoke to be discharged to the air after the high-temperature smoke reaches the standard. The method takes the anthracite as the fuel or the reducing agent, and the other methods use the coke, the diesel oil or the electric energy, so that the method is more economical and suitable for large-scale production.
Description
technical field [0001] The invention relates to a method for producing rough lead by side-blown smelting of copper scum, which belongs to the technical field of metallurgy. Background technique [0002] Copper scum treatment processes include blast furnace method, reverberatory furnace method, converter method, electric furnace method, acid leaching method, ammonia leaching method, etc. Blast furnace processes copper scum, Cu / Pb in copper matte is relatively low (only 2 to 3), the recovery rate of copper is low, and a large amount of copper remains in crude lead, causing copper, arsenic and precious metals to circulate in the process. The reverberatory furnace process has poor working conditions, low thermal efficiency, corroded lining, and frequent maintenance, and has been listed as a deadline-eliminated process by the state. The rotary kiln (also known as short kiln) has a large diesel consumption (5-6%) in the treatment of copper dross, and the production cost is relati...
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