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Method for treating copper dross

A technology of copper scum and water slag, which is applied in the field of metallurgy, can solve the problems of high energy consumption, high processing cost, and low production efficiency in smelting, and achieve the effect of high metal direct recovery rate, high recovery rate, and high smelting efficiency

Active Publication Date: 2014-07-16
JIYUAN WANYANG SMELTING GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method adopts the intermittent operation mode, and uses high-pressure air to blast anthracite into the smelting reaction, which has low production efficiency, high energy consumption for smelting, and high processing costs.

Method used

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  • Method for treating copper dross
  • Method for treating copper dross
  • Method for treating copper dross

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 shown at 6m 2 In the oxygen-enriched molten pool smelting side-blown furnace, copper scum (Pb72%, Cu8.1%), soda ash, pyrite (S32%), water slag, according to the mass ratio of 100:3:6:12 Do batching, feed for 3 hours, a total of 60t, at the same time unload 6.6t of coal from the feeding port, and blow in 2300Nm of oxygen-enriched air 3 / h, the oxygen concentration is 51%.

[0038] Crude lead is released through the lead siphon, and 33.6t of crude lead (containing 97.5% lead, Cu0.4%) is produced. The crude lead produced needs to be deleaded and refined; matte (containing 5.4% lead, Cu0.4%) is produced through the matte port Cu43%) 8.4t, the produced matte is smelted in the converter; 11.7t of slag (containing 1.4% lead, Cu0.28%) is released through the slag outlet, and the slag is used for external sale; high-temperature flue gas recovers waste heat through the waste heat boiler , after dust collection by pulse, desulfurization by desulfurization tower...

Embodiment 2

[0041] Such as figure 1 shown at 6m 2 In the side-blown furnace, copper scum (Pb72%, Cu8.1%), soda ash, pyrite (S32%), and water slag are mixed according to the ratio of mass ratio 100:3:5:8, and the feeding time is 4 hours. , a total of 80t. At the same time, 8.8t of coal is discharged from the discharge port, and 2500Nm of oxygen-enriched air is blown in 3 / h, the oxygen concentration is 54%.

[0042] Crude lead is released through the lead siphon channel, producing 47.3t crude lead (containing 97.5% lead, Cu0.4%), 8.3t soot, 12.1t slag (containing 1.3% lead, Cu0.25%), and matte copper (containing lead 5.1%, Cu46%) 11.7t, lead yield 92.9%, recovery rate 99.7%, copper recovery rate 92.2%, copper matte Cu / Pb ratio 9.02.

Embodiment 3

[0044] Such as figure 1 shown at 6m 2 In the side-blown furnace, copper scum (Pb57%, Cu10.2%), soda ash, pyrite (S32%), and water slag are mixed according to the mass ratio of 100:2:8:8, and the feeding is 4h , a total of 48t. At the same time, 3.8t of coal is discharged from the discharge port, and 2300Nm of oxygen-enriched air is blown in. 3 / h, the oxygen concentration is 56%.

[0045] Crude lead is released through the lead siphon channel, producing 21.6t crude lead (containing 97.5% lead, Cu0.4%), 4.9t soot, 13.5t slag (containing 1.2% lead, Cu0.24%), and matte copper (containing lead 5.2%, Cu48%) 7.7t, lead yield 93.1%, recovery rate 99.3%, copper recovery rate 89.1%, copper matte Cu / Pb ratio 9.1.

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Abstract

The invention provides a method for treating copper dross. According to the method, copper dross is treated by using an oxygen enrichment molten pool smelting side blowing furnace, coal granules are adopted as a reducing agent and fuel, copper dross, pure alkali, pyrite and water granulated slag are adopted for blending, together with the coal granules, are fed into the furnace from the feeding hole of the oxygen enrichment molten pool smelting side blowing furnace through a belt, and are blown into an oxygen enrichment air smelting pool for smelting so as to obtain crude lead, copper matte, furnace slag and high-temperature flue gas. By adopting the method provided by the invention, continuous feeding is achieved; due to adoption of a DCS automatic control technique, the working intensity of operators is low, the flushing and casting environment is good, the side blowing treatment bed is high in capacity, the efficiency of the smelting pool is high, the metal recycling rate is high, and the smelting energy consumption is low.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and relates to a method for treating copper scum. Background technique [0002] Copper scum treatment processes in the prior art include reverberatory furnace method, blast furnace method, converter method, electric furnace method, acid leaching method, ammonia leaching method and the like. [0003] Among them, the reverberatory furnace process has poor working conditions, low thermal efficiency, corroded lining, frequent maintenance, and has been listed as a limited-time phase-out process by the state. The copper scum is treated by the blast furnace method, the lead grade in the copper matte is high, the copper grade is low, the Cu / Pb ratio is low (only 2 to 3), the recovery rate of lead and copper is low, a large amount of copper remains in the crude lead, and a large amount of Lead enters the matte, causing copper, arsenic and precious metals to circulate in the process. Rotary kiln (also ...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B13/00C22B15/00
CPCY02P10/20
Inventor 李小兵张立李伟伟卢珺珺卢国才房红俊卢海军
Owner JIYUAN WANYANG SMELTING GROUP
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