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Device and technology for smelting and processing secondary lead materials to generate lead bullion by adopting bottom blowing furnace hearth

A molten pool smelting and regenerated lead technology, which is applied in the field of non-ferrous metallurgy, can solve problems such as relatively difficult application, and achieve the effects of convenient operation, long furnace life, and guaranteed safety

Inactive Publication Date: 2013-12-18
HENAN YUGUANG GOLD & LEAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese patent 201210071501 introduces a wet process for waste lead-acid batteries, the following reaction occurs first under certain conditions: PbSO 4 +2NaOH=Pb(OH) 2 +Na 2 SO 4 ;Pb+PbO 2 =2PbO; PbO+H 2 O+NaOH=Na[Pb(OH) 3 ]; and then carry out electrolysis through selective ion membrane electrolyzer, the electrolyte is 15-30% sodium hydroxide solution, because the electrolyte medium of this process is not the fluorosilicic acid commonly used by lead enterprises at present, so the industrial application is difficult

Method used

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  • Device and technology for smelting and processing secondary lead materials to generate lead bullion by adopting bottom blowing furnace hearth
  • Device and technology for smelting and processing secondary lead materials to generate lead bullion by adopting bottom blowing furnace hearth

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Effect test

Embodiment 1

[0044] A process for producing crude lead from secondary lead materials by smelting in a bottom-blown molten pool, comprising the following steps:

[0045] Step 1), mix the lead sulfate paste separated from waste lead-acid batteries with coal powder, iron ore, stone or quartz with a particle size of 1-10mm, and the amount of iron ore, stone or quartz added meets the following iron making Calcium silicon slag needs: FeO / SiO 2 / CaO=1:1:0.5, the amount of lead-containing scrap, coal powder, iron ore, stone or quartz should be added so that the main components after mixing the ingredients are: the mass percentage of Pb is 40%; the mass of S The percentage is 5%; the mass percentage of Fe is 15%; SiO 2 The mass percent of CaO is 15%; The mass percent of CaO is 7.5%, and granulation obtains pellet, for subsequent use;

[0046] Step 2), the pellets prepared in step 1) are obtained from such as figure 1 The material feeding port of the device shown is continuously and quantitativel...

Embodiment 2

[0056] A process for producing crude lead from secondary lead materials by smelting in a bottom-blown molten pool, comprising the following steps:

[0057] Step 1) Mix the lead-containing scrap produced in the production process of lead-acid batteries with coal powder, iron ore, stone or quartz with a particle size of 1-10 mm. The amount of iron ore, stone or quartz added meets the following requirements Iron-silicon-calcium slag needs: FeO / SiO 2 / CaO=1.5:1:0.5, the amount of lead-containing scrap, coal powder, iron ore, stone or quartz should be added so that the main components after mixing the ingredients are: the mass percentage of Pb is 40%; the mass of S The percentage is 5%; the mass percentage of Fe is 15%; SiO 2 The mass percent of CaO is 10%; The mass percent of CaO is 5%, and granulation obtains pellet, for subsequent use;

[0058] Step 2), the pellets prepared in step 1) are obtained from such as figure 1 The material feeding port of the device shown is continuo...

Embodiment 3

[0068] A process for producing crude lead from secondary lead materials by smelting in a bottom-blown molten pool, comprising the following steps:

[0069] Step 1), the regenerated lead material is lead sulfate paste separated from waste lead-acid batteries and the lead-containing scraps produced in the production process of lead-acid batteries are simultaneously treated with coal powder, iron ore, stone or quartz with a particle size of 1-10mm Mixed ingredients, the amount of iron ore, stones or quartz added to meet the following requirements for making iron-silicon-calcium slag: FeO / SiO 2 / CaO=1.5:1:0.8, the amount of lead-containing scrap and lead sulfate plaster, coal powder, iron ore, stone or quartz should be such that the main components of the mixed ingredients are: the mass percentage of Pb is 40%; the mass of S The percentage is 5%; the mass percentage of Fe is 15%; SiO 2 The mass percent of CaO is 10%; The mass percent of CaO is 8%, and granulation obtains pellet, ...

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Abstract

The invention belongs to the field of nonferrous metallurgy, and particularly relates to a device and technology for smelting and processing secondary lead materials to generate lead bullion by adopting a bottom blowing furnace hearth. Bullion lead materials are matched with pulverized coal, then limestone, pebbles, iron ore and other solvents are added to the mixture according to slag types and pelletizing is carried out, the lead bullion and reducing slag are output through the processing of a bottom blowing smelting furnace, the lead bullion is sent to a refining system, the content of valuable metal in the reducing slag is low, and the reducing slag is deposited as waste slag. Meanwhile, waste heat recovery is carried out on the output high concentration SO2 smoke and dust collection is carried out on the output high concentration SO2 smoke through a dust collection system, then the high concentration SO2 is sent to a sulfuric acid preparing system or a sodium sulfite preparing system to produce sulfuric acid or sodium sulfite products, and smoke dust is returned to carry out dosing. According to the device and technology for smelting and processing the secondary lead materials to generate the lead bullion by adopting the bottom blowing furnace hearth, lead plaster of secondary lead can be processed economically and effectively, and the process device is strong in leakproofness, good in environmental protection effect, high in efficiency of heat utilization, convenient to operate, high in automation level, low in labor intensity, long in service life of the furnace and high in metal direct recover rate, and effectively solves the problems that energy consumption is high, efficiency of heat utilization is low, and environmental protection effects are poor in the smelting and recovering process of lead-bearing materials.

Description

technical field [0001] The invention belongs to the field of metallurgy of non-ferrous metals, and in particular relates to a device and a process for producing crude lead by adopting bottom-blown molten pool smelting to process recycled lead materials. Background technique [0002] At present, in the recycling process of recycled lead, lead-acid batteries will be broken and sorted to obtain lead paste. Because lead paste pyrolysis needs to consume a lot of heat, most enterprises currently adopt the method of adding soda ash and coal to supplement heat for smelting and recycling. Most of the devices used are backward devices such as reverberatory furnaces with poor airtightness and low heat utilization rate. Sodium sulfate waste residue and low concentration of SO will be produced in 2 Flue gas is prone to excessive fuel consumption, lead vapor and dust pollution. [0003] At present, some enterprises smelt primary lead and recycled lead together to produce crude lead. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B13/00
Inventor 李卫锋狄聚才赵传和蒋丽华赵朝军杨明
Owner HENAN YUGUANG GOLD & LEAD
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