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Method and device for producing black copper by sludge containing copper

A technology of copper sludge and black copper, applied in the metallurgical field, can solve the problems of high sulfur content and long process, achieve the effect of low content of harmful substances, improve recovery rate, and solve long process

Pending Publication Date: 2020-06-19
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a method and device for producing black copper from copper-containing sludge, so as to solve the problems of long process, copper content in tailings, and sulfur content in the prior art when copper is recovered from copper-containing sludge. high volume issues

Method used

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  • Method and device for producing black copper by sludge containing copper
  • Method and device for producing black copper by sludge containing copper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] The copper-containing sludge with a water content of 75% is put into a rotary kiln for drying. The inlet temperature of the flue gas at the tail of the drying kiln is about 150°C, and it is dried under the flue gas at 150°C until the water content is about 20% and it is granular.

[0074] Every ton of copper-containing sludge (water content 20%) needs to be added with 57kg of silica, and the sludge and silica are mixed and put into figure 2 The melt pool in the bottom-blown oxidation zone shown is protected by water-cooled furnace walls, water-cooled lance refractories and lance hanging slag. Bottom-blown pure oxygen and coal powder are used to process 100kg of coal powder and 12Nm of air per ton of sludge (water content 20%) 3 (Powder spraying carrier gas), oxygen 294Nm 3 . The molten pool is all slag, the temperature of the molten pool is 1250-1350°C, and the SO in the flue gas 2 , O 2 The volume contents are 5.05% and 4.65% respectively. The flue gas is passed t...

Embodiment 2

[0078] The treatment method is the same as that of Example 1, but the sludge drying degree is higher, and the water content is about 10%. Oxygen-enriched air with an oxygen concentration of 90% is used for bottom blowing and side blowing combustion for heat supply, and the temperature of the melt pool in the furnace is controlled to be higher.

[0079] The copper-containing sludge with a water content of 75% is put into a rotary kiln for drying. The inlet temperature of the flue gas at the tail of the drying kiln is about 150°C, and it is dried under the flue gas at 150°C until the water content is about 10%, and it is granular.

[0080] Every ton of copper-containing sludge (water content 10%) needs to be added with 64kg of silica, and the sludge and silica are mixed and put into figure 2 The melt pool in the bottom-blown oxidation zone shown is protected by water-cooled furnace walls, water-cooled lance refractories and lance hanging slag. Bottom-blown pulverized coal and o...

Embodiment 3

[0084] The treatment method is the same as that of Example 1, but the drying degree of the sludge is low, and the water content is about 40%. Oxygen-enriched air with an oxygen concentration of 95% is used for bottom blowing and side blowing combustion for heat supply, and the temperature of the melting pool in the furnace is controlled to be low.

[0085] The copper-containing sludge with a water content of 75% is put into a rotary kiln for drying. The inlet temperature of the flue gas at the drying kiln tail is about 150°C, and it is dried under the flue gas at 150°C to a water content of about 40%.

[0086] Every ton of copper-containing sludge (water content 40%) needs to be added with 42.5kg of silica, and the sludge and silica are mixed and put into figure 2The melt pool in the bottom-blown oxidation zone shown is protected by water-cooled furnace walls, water-cooled lance refractories and lance hanging slag. Bottom-blown pulverized coal and oxygen-enriched (95% oxygen-...

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Abstract

The invention provides a method and device for producing black copper by sludge containing copper. The method comprises the following steps that S1, the sludge containing copper is dewatered to the water content of 10-40wt% to form dewatered sludge; S2, the dewatered sludge is mixed with a fusing agent to be subjected to bottom blowing oxidation smelting in a full-slag smelting pool to form oxidizing smelting slag; S3, the oxidizing smelting slag is subjected to side blowing reduction smelting in a reduction smelting pool to obtain a reduced smelting product; and S4, the reduced smelting product is subjected to sedimentation treatment to obtain the black copper and furnace slag. According to the method and device for producing the black copper by the sludge containing copper, the sludge containing copper is treated by using the technology, the problems of long process, high tailing copper content, high sulfur content and the like when the copper is recycled from the sludge containing copper in the prior art are effectively solved, and the recovery rate of valuable metal is improved.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method and a device for producing black copper from copper-containing sludge. Background technique [0002] Copper-containing sludge generally comes from the electroplating industry. In addition to a large amount of copper, the sludge also contains valuable metals such as nickel, lead, zinc, and tin. Copper-containing sludge generally also contains sulfate. At present, the method of recovering copper from copper-containing sludge mainly adopts side-blowing furnace or blast furnace for reduction smelting. However, with these processes, a part of matte exists while black copper is produced, resulting in stratification of the melt, incomplete separation, and sulfides are easily mixed in the tailings. Generally, low-sulfur raw materials are mixed in for reduction smelting To reduce the proportion of matte, the black copper and matte produced need to be separated again. The blac...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B15/00
CPCC22B7/001C22B15/003C22B15/0052Y02P10/20
Inventor 王云李东波郭亚光陈学刚裴忠冶祁永峰
Owner CHINA ENFI ENGINEERING CORPORATION
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