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Three-body melting and casting furnace and melting and casting method for secondary copper refining

A technology for recycling copper and melting and casting furnaces, which is applied in the direction of improving process efficiency, etc., to achieve the effects of improving dezincification resistance, eliminating defects such as inclusions, and fine and uniform structures

Active Publication Date: 2020-05-08
NINGBO CHANGZHEN COPPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a three-body melting and casting furnace and a melting and casting method for secondary copper refining in view of the deficiencies in the prior art. Brass, cast high-quality brass slab, and the alloying degree of the slab is high, the structure is fine and uniform, the defects such as pores and inclusions are effectively eliminated, the dezincification resistance is improved, and the brass that meets the high polishing requirements can be produced. Sanitary Polishing Products

Method used

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  • Three-body melting and casting furnace and melting and casting method for secondary copper refining
  • Three-body melting and casting furnace and melting and casting method for secondary copper refining
  • Three-body melting and casting furnace and melting and casting method for secondary copper refining

Examples

Experimental program
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Effect test

Embodiment 1

[0018] The secondary copper refining of embodiment 1 uses three-body melting and casting furnace, such as figure 1 As shown, it includes a smelting furnace 1, an intermediate furnace 2 and a casting furnace 3. The upper end of the smelting furnace 1 is sequentially connected with a cover 11, a first dust removal cover 12 and a first air duct 13, and the cover 11 is provided with an inlet and outlet. A revolving door 14 is installed at the entrance and exit, and the smelting furnace 1 is connected with a first heat preservation device (not shown in the figure); the intermediate furnace 2 is a refining furnace, and the upper side of the intermediate furnace 2 is provided with a furnace cover (not shown in the figure). ), used to seal the liquid surface, the upper end of the intermediate furnace 2 is sequentially connected with a second dust cover 21 and a second air duct 22, and the intermediate furnace 2 is connected with a second heat preservation device (not shown) and the fir...

application example 1

[0019] Application Case 1: Using the three-body melting and casting furnace for secondary copper refining in Example 1 to produce HPb59-1 brass ingots by melting and casting, the melting and casting process is as follows: after the waste yellow miscellaneous copper raw materials are put into the melting furnace for melting, then the melt is transferred Refining in the intermediate furnace, and finally transferred to the casting furnace for casting; wherein, the refining process of the intermediate furnace is: adjust the temperature of the melt in the intermediate furnace to 920 ° C, then add a refining agent (commercially available product), fully stir and keep warm for 12 Minutes, and then heat up the melt to 980 ℃ ~ 1020 ℃ refining 1 ~ 1.5 hours; the casting temperature of the casting furnace is 930 ~ 960 ℃.

application example 2

[0020] Application Case 2: The difference from Application Case 1 is that the refining time is 1.5 to 2 hours at a temperature of 980°C to 1020°C.

[0021] See Table 1 for the feed details of the scrap brass raw materials used in Application Case 1 and Application Case 2, and see Table 2 for the dezincification resistance of the produced HPb59-1 brass ingot.

[0022] Table 1 Production of HPb59-1 brass ingots with waste and miscellaneous brass material feeding details

[0023]

[0024] Dezincification resistance of the HPb59-1 brass ingot produced in Table 2

[0025]

[0026] The HPb59-1 brass ingots produced in Application Case 1 and Application Case 2 were polished and tested, and there were no poor polishing such as porosity, inclusions, and tailing. It can be seen from Table 2 that the intermediate furnace refining time is 1.5 to 2 hours, the degree of alloying of the slab is higher, and the dezincification resistance is better.

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Abstract

The invention discloses a three-body melting casting furnace for reclaimed copper refining and a melting casting method. The melting casting furnace comprises a melting furnace, an intermediate furnace and a casting furnace. The upper end of the melting furnace is provided with an enclosure cover, a first dust-removing cover and a first air duct. The enclosure cover is provided with an inlet and outlet. A revolving door is installed at the inlet and outlet. A first heat insulating device is connected to the melting furnace. The intermediate furnace is a refining furnace. The upper side of theintermediate furnace is provided with a furnace cover. The upper end of the intermediate furnace is provided with a second dust-removing cover and a second air duct. A second heat insulating device isconnected to the intermediate furnace. A third air duct is connected to the upper end of the casting furnace. A third heat insulating device is connected to the casting furnace. The melting furnace,the intermediate furnace and the casting furnace are sequentially arranged from high to low. Through the melting casting furnace and the melting casting method, waste yellow composition brass which iscomplex in composition, low in purity and high in oil and water content can be melted and cast, high quality brass casting blanks can be obtained, the melting and burdening modes that melting is conducted through a furnace and discharging is conducted through another furnace of conventional smelting devices are broken, assembly line burdening and melting are achieved, and the melting efficiency and automatic degree are improved.

Description

technical field [0001] The invention belongs to the technical field of secondary copper raw material melting and casting equipment, in particular to a three-body melting and casting furnace and a melting and casting method for secondary copper refining. Background technique [0002] China is currently the world's largest producer, trader and consumer of copper processing materials. However, China's copper resources are very short, and the contradiction between raw material supply and consumption demand has become increasingly prominent. Copper has good regeneration performance. Compared with primary copper, scrap copper has the advantages of energy saving, environmental protection, and economy as a raw material. Therefore, scrap copper has become an important source of raw materials for the copper industry. In recent years, China's secondary copper industry has developed rapidly, and the output of secondary copper has increased rapidly. The main sources of secondary copper ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B15/14B22D7/00
CPCB22D7/005C22B7/001C22B15/0028C22B15/006Y02P10/20
Inventor 杨东超郭淑梅宋长洪符志祥李志国黄腾郎滨陈国华
Owner NINGBO CHANGZHEN COPPER CO LTD