Method and device for continuously treating lead anode slime

A technology of lead anode slime and precious lead, applied in the field of lead anode slime treatment method and its device, can solve the problems of poor environmental protection, long production cycle, small production capacity, etc., reduce environmental pollution, strengthen smelting process, reduce production cost effect

Active Publication Date: 2010-11-24
JIYUAN YUGUANG NONFERROUS METALLURGY DESIGN & RES INST CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

The wet production cost is high and the amount of wastewater is large; the wet-fire combined process is high in cost, the waste water is large, and there is waste gas; the cost of the traditional pyrotechnic process is lower than that of the wet process and the wet-fire process The pyrotechnic process uses anode slime to enter the noble lead furnace intermittently (the feeding port, slag outlet, noble lead outlet, and smoke outlet are the same outlet), and the reduction smelting obtains noble lead containing gold and silver, and the noble lead is then passed through the refining furnace ( The feeding port, the slag outlet, the alloy outlet, and the smoke outlet are the same outlet) oxidation and refining, and the produced gold and silver alloy plates are sent to silver electrolysis
[0003] The disadvantages of traditional pyrolysis treatment of anode slime are: low gold and silver direct recovery rate, large amount of slag returned, long production cycle, high production cost, and intermittent operation mode, the furnace is not tightly sealed, poor environmental protection, production Small capacity, high energy consumption
The BBOC method uses oxygen bottom-blown molten pool smelting, which can shorten the precious lead oxidation refining cycle, but only the refining section adopts advanced technology; the Kaldo method uses oxygen top-blowing smelting and oxidation refining processes, which shortens the production cycle and expands production capacity, but The operation mode is still intermittent operation, and the furnace temperature changes periodically, resulting in a short service life of the refractory material in the furnace
[0005] The slag type used in the traditional pyrotechnic process, the foreign BBOC method and the Kaldo method for anode slime smelting are all high-alkali slag types, resulting in a fast consumption of refractory materials in the furnace and a short service life of the furnace

Method used

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  • Method and device for continuously treating lead anode slime
  • Method and device for continuously treating lead anode slime

Examples

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Effect test

Embodiment 1

[0036] Example 1: Method and device for continuous processing of lead anode slime by molten pool smelting

[0037] Such as figure 1 , figure 2 , image 3 shown. figure 2 The winning number 1 is the grab crane, 2 is the hopper, 3 is the electronic belt scale or nuclear belt scale, 4 is the oxygen bottom-blown noble lead furnace, 5 is the feeding port, and 6 is the oxygen blowing pipe at the bottom of the oxygen bottom-blown noble lead furnace 7 is the natural gas burner hole, 8 is the slag outlet, 9 is the expensive lead outlet, 10 is the smoke outlet, 11 is the chute; 12 is the oxygen bottom blowing silver furnace, 13 is the smoke outlet, 14 is a feed inlet, 15 is the spray gun flange of the oxygen blowing pipe at the bottom of the silver-separating furnace, 16 is a natural gas burner, 17 is a slag outlet of the silver-separating furnace, and 18 is an alloy outlet siphoned out of the oxygen-separating furnace at the bottom; 19 20 is the oxygen top-blown refining furnace,...

Embodiment 2

[0057] Embodiment 2: A method for continuously processing lead anode slime by molten pool smelting, and the device is the same as that in Embodiment 1.

[0058] Lead anode slime, return material, and coke are batched according to the weight ratio of 100:0~10:2~5, and the mixed batching is carried out in the pit by using the grab truck 1, and the mixed materials are transported to the silo 2 by grab bucket truck , the material in the silo is measured by a nuclear belt scale or an electronic belt scale, and enters the oxygen bottom-blown precious lead furnace 4 for melting and oxidation and reduction reactions, and continuously and quantitatively feeds oxygen into the molten pool, the oxygen pressure is 0.8-1.0MPa, and the oxygen flow rate is 30 ~50m 3 / h, the oxidation-reduction reaction in the furnace is controlled by adjusting the oxygen in the oxygen bottom blowing noble lead furnace lance 6 and the amount of coke in the batching.

[0059] Negative pressure is maintained in...

Embodiment 3

[0066] Embodiment 3: basically the same as Embodiment 2, the difference is:

[0067] Lead anode slime, return material, and coke are batched according to the weight ratio of 100:10~20:3~6, and the mixed batching is carried out in the pit with the grab crane 1, and the mixed material is transported to the bin 2 with the grab bucket truck , the material in the silo is measured by a nuclear belt scale or an electronic belt scale, and enters the oxygen bottom-blown precious lead furnace 4 for melting and oxidation and reduction reactions, and continuously and quantitatively feeds oxygen into the molten pool, the oxygen pressure is 0.8-1.0MPa, and the oxygen flow rate is 25 ~45m 3 / h, the oxidation-reduction reaction in the furnace is controlled by adjusting the oxygen in the oxygen bottom blowing noble lead furnace lance 6 and the amount of coke in the batching.

[0068] Other steps are the same as in Example 2 and will not be repeated.

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Abstract

The invention relates to a method and device for continuously treating lead anode slime by bath smelting. The method comprises the following steps: proportionally adding lead anode slime, recycled materials and nut coke as charging materials into an oxygen bottom blowing bullion lead furnace for smelting to generate bullion lead of which the bullion grade is 25-50%, primary slag and primary soot; adding the bullion lead into an oxygen bottom blowing silver-smelting furnace to react to generate oxidizing slag, secondary soot and alloy liquid of which the bullion grade reaches 70-80%; introducing the alloy liquid into an oxygen top blowing refining furnace to react to generate tellurium slag, clear alloy slag, secondary soot and alloy liquid of which the bullion grade reaches 96-98%; and discharging the oxidizing slag, then enabling the oxidizing slag to enter a slag bullion lead furnace, and adding the nut coke to react to generate low-grade bullion lead, secondary slag and secondary soot, wherein the low-grade bullion lead is returned for proportioning. The invention realizes the continuous treatment of the anode slime, strengthens the smelting process, improves the direct recovery rate of the bullion, lowers the production cost, reduces the environmental pollution, and shortens the treatment period of the anode slime.

Description

Technical field: [0001] The invention belongs to the non-ferrous metal smelting industry, and relates to a method and a device for processing lead anode slime, in particular to a method and a device for continuously processing lead anode slime by adopting molten pool smelting. Background technique: [0002] Lead anode slime mainly contains gold, silver, antimony, bismuth, lead, copper, arsenic and other elements. At present, there are basically three methods for the treatment of lead anode slime: one is the pyrotechnic process; the other is the all-wet process; the third is the combined wet-fire process. The wet production cost is high and the amount of wastewater is large; the wet-fire combined process is high in cost, the waste water is large, and there is waste gas; the cost of the traditional pyrotechnic process is lower than that of the wet process and the wet-fire process The pyrotechnic process uses anode slime to enter the noble lead furnace intermittently (the feed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00
CPCY02P10/20
Inventor 赵传合李卫锋刘素红夏胜文徐诗艳夏会林张素霞
Owner JIYUAN YUGUANG NONFERROUS METALLURGY DESIGN & RES INST CO LTD
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