Solid phase electrolytic treatment of waste lead-acid batteries (2)

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In processing 15 000 t of lead-acid battery production equipment installed inside the main example
See the table below for examples of equipment. Waste lead battery separator (including two 20-line conversion tanks and 20 expansion frame filter presses and other equipment) can be imported from abroad, can handle 5t waste lead storage batteries per hour, with high degree of automation, only one person is required to operate . The lead mud coating machine is designed and manufactured by itself, and can be coated with 120 pieces per hour. Electrolysis has 10 lines, each line has 40 slots, each block has 4 cathodes, 5 anodes, the plate area is 0.2m 2 , and the plate materials are all stainless steel. One cycle of electrolysis is 20h. After the electrolytic material facing l0t iron melt pot, and the melting grid alloy formulated in 20t wok. There is also a set of 30m 3 wastewater treatment plant.

Equipment specification example

name

unit

Quantity

specification

Separator

set

1

5t waste lead storage battery per hour (including 20m 3 conversion tank and 20m 2 plate and frame filter presses)

Coating machine

set

1

120 pieces per hour

Electrolytic cell

only

400

Length = 0.83m , width = 0.53m , height = 0.50m

Rectifier

station

10

0~750A/150V

Alloy melting pot

set

1

20t

Material melting pot after electrolysis

set

1

10t

Continuous ingot casting machine

set

1

20t/h

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Process conditions The solid-phase electrolytic treatment of waste lead-acid batteries is as follows:
Current density: 600A/m 2 ;
Electrolyte: 10%~15% NaOH solution;
Temperature: 40~60 °C;
Pole spacing: 80mm;
Cell voltage: 1.9~2.6V.
Technical and economic indicators The technical and economic indicators for solid phase electrolytic treatment of waste lead-acid batteries are as follows:
Alloy melting recovery rate: 80%, (the total metal recovery after scum solid phase electrolysis is 95%);
Solid phase electrolytic lead recovery rate: 95%; current efficiency: 85%;
Solid phase electrolysis power consumption: 600kW·h/tPb;
Electrical lead purity: >99.994%;
Alkali consumption: 200kg NaOH / tPb;
Oil and gas consumption (with molten lead): 20m 3 / tPb;
After treatment of wastewater: lead <0.5 x 10 -4 %, BOD <100 x 10 -4 %.
The table below shows the daily income and expenditure of the production unit for processing 15,000 tons of waste lead-acid batteries per year.

Balance sheet

support      Out / yuan

Receive    In / yuan

name

Quantity

unit price

price

name

Quantity

unit price

price

Waste lead storage battery

50t

1800

90000

Electric lead

16t

600

73600

Electricity (electrolysis + power)

6600kW · h

0.6

15960

alloy

12t

5200

2400

Liquid alkali ( 50% )

6t

1100

6600

plastic

2.8t

1000

2800

Artificial

30 workers

50

1500

　

　

　

　

LPG

　

　

900

　

　

　

　

water

　

　

250

　

　

　

　

other

　

　

400

　

　

　

　

total

　

　

115610

　

　

　

138800

references:
.. 1 Fu-yuan, production status and development trend China Secondary Lead Zinc Lead Information (1999) conference special issue: 36-47
2 K.Strode, Recovery of Metals from Lead-containing Scrap Materials, British Patent 1368 423 (1974)
3 R F. Lee, Electrolytic Recovery of Lead, British Patent 1428 957 (1976)
4 Lu Keyuan. Lead-containing material solid phase electrolysis device. Chinese patent, 85200287.4 (1986)
5 Lu Keyuan. Solid phase electrolysis treatment of waste lead storage battery production practice. Non-ferrous metals (smelting part), 1999 (5): 1-3

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