5,000tpa copper scrap reverberatory furnace

Product Overview

Description

1.       Process description

 

Figure 1 Process of copper anode making

 

Figure 2 Equipment connection diagram

1)    Feeding preparation: By metal scrap baler, we make packed and pressed Copper scrap blocks, then feed into the reverberatory for further refining.

2)    Oxidation: The more activated metals than Copper in liquid will be oxided by compressed air. In order to remove the activated metals as much as possible, a little Copper will be oxide into Cu₂O. And oxide slag will be removed by several times through slag tap-hole. And the oxidation temperature is about 1200°C. Oxidation slag could be feed back in next operation.

3)    Reduction: when oxide period is over, compressed air will be stop, and then inject reduction air (Diesel). Cu₂O will be reduced into Cu. During reduction, we will sample Copper liquid to analyze the Cu content to see if it is qualified or not.

4)    Casting: Copper liquid will be cast into Copper anode plate by semi-auto casting wheel with 16 moulds. Copper anode will be send to further electro-refining process to produce Copper cathode.

5)    Off-gas treatment system: The off-gas (>1000°C) from furnace end, will be through surface cooler (250~300°C), bag-type dust collector, exhaust fan, and stack. The clean off-gas will go to atmosphere through stack with dust less than 50mg/Nm³.

3. Main technical and economic indexes

Table 5.1 Technical and economic indexes of copper anode making

S/N.	Item	Unit	Value	Remarks
1	Copper scrap treating capacity	t/year	5000
2	Cu content of Copper scrap	%	≥92
3	Output of anode Copper	t	4555
4	Anode plate weight	kg	260
5	Cu content of anode Copper	%	≥99.3
6	Treating capacity of reverberating furnace	t/d	40
7	Area of reverberating furnace	m2	11
8	Batch operation time	h	18
8.1	Feeding	h	4.5
8.2	Smelting	h	3.5
8.3	Oxidation	h	2.5
8.4	Reduction	h	1.5
8.5	Casting	h	6.0
9	Dust rate	%	<3
10	Slag rate	%	5
13	Cu content of slag	%	30
14	Direct recovery rate of Cu	%	98.37
15	Recovery rate of Cu	%	99.2
16	Power consumption	kwh/t	20
17	Water consumption	t/t	<1
18	Diesel consumption	kg/t	95
19	Air for oxidation	m3/t	200
20	Refractory material	t	0.016	Middle maintenance: 50t, Light maintenance: 30t
21	Installed power capacity	Kw	150

4. Typical case photos of copper anode making

4.1 Reverberatory furnace

 

  

4.2 Copper anode casting

 

4.3 Layout of workshop