Method for producing metallic lead and zinc by using lead-zinc containing waste slag or lead-zinc monoxide mine

A lead-zinc oxide, metal lead technology, applied in the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of serious environmental pollution of lead dust, high energy consumption, low product purity, etc., and achieve good environmental benefits and energy consumption. Low and simple effect of impurity removal process

Active Publication Date: 2007-08-08
昆明同越科技开发有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has high energy consumption, low product purity, and the lead dust produced in the process has serious environmental pollution.

Method used

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  • Method for producing metallic lead and zinc by using lead-zinc containing waste slag or lead-zinc monoxide mine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] See Figure 1. Using lead-zinc ash (lead-zinc waste residue) from a certain factory as raw material, its composition is shown in Table 1:

[0014] Table 1 Composition of lead-zinc ash in a factory

[0015] Element

[0016] First, immerse 500g of the above-mentioned lead-zinc ash into 5L5mol / L NaOH solution, the leaching temperature is 30°C, and stir for 200 minutes at a speed of 500 rpm, and the lead-zinc in the lead-zinc ash enters the solution. Then filter while hot to obtain filter residue and filtrate. Filtrate composition is as shown in table 2:

[0017] Table 2 Composition of lead-zinc ash-alkali leaching solution

[0018] Element

[0019] After the filter residue is washed with NaOH solution and water, the washing water is returned to be used as a strong alkali leaching cycle, and the washing residue is landfilled. The filtrate is directly used to electrolyze lead, using stainless steel as the cathode and anode, at 20-30°C, the current de...

Embodiment 2

[0021] Taking lead-zinc oxide ore as raw material, its composition is shown in Table 3:

[0022] Table 3 Composition of a lead-zinc oxide ore

[0023] Element

[0024] Crush 240g of the above-mentioned lead-zinc oxide ore to 0.1-1mm, then immerse in 6L5mol / L NaOH solution, the leaching temperature is 90°C, and stir for 100 minutes at a speed of 1000 rpm, the lead and zinc in the ore powder enter the solution. Then filter while hot, the filtrate composition is as shown in table 4:

[0025] Table 4 Composition of lead-zinc oxide alkali leaching solution

[0026] Element

[0027] The filter residue is washed with NaOH solution and water and then buried. The filtrate is directly used to electrolyze lead, using stainless steel as the cathode and anode, at 30-50°C, the current density is 1000A / m 2 , the voltage is 1.8-2.0V, and the electrolysis takes 2 hours to obtain crude lead with a purity of 98.5% on the cathode. Zinc-containing electrolyte after electr...

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Abstract

The invention discloses a manufacturing method of metal lead and zinc through waste slag with lead and zinc or low-grade lead or zinc oxide, which comprises the following steps: grinding lead zinc slag or lead zinc oxide into 0.1-1mm; stirring and leaching through strong base solution under 10-100 deg.c for 30-1000min; filtering; draining filtrate; electrolyzing filtrate directly to generate lead with current density at 100-1000A/m2 under 30-100 deg.c for 1-5h; stopping electrolyzing when tank voltage is improved to 1.8-2.5V; producing rough lead with 97-99.9% lead on the cathode; pressing; obtaining electrolytic refined lead; electrolyzing residual electrolytic liquid with zinc under 10-100 deg.c at 2.5-3.5V with current density at 500-1500A/m2 for 1-10h; drying zinc on the cathode protected by inert gas; obtaining one-grade metal zinc powder; circulating residual electrolytic solution in the alkaline leaching course directly.

Description

technical field [0001] The invention discloses a method for producing metal lead and zinc by using lead-zinc waste slag or lead-zinc oxide ore, relating to a method for producing metal lead and zinc by using lead-zinc waste slag, belonging to the field of non-ferrous metal recovery and solid waste resource utilization. technical background [0002] Lead and zinc are widely used. Lead is mainly used in lead-acid batteries, cable sheaths, machinery manufacturing and other fields. Metal zinc powder is mainly used in dry battery manufacturing, coatings, metallurgy and other fields. At present, the raw material for lead production is galena with a lead content of more than 50%. Basically, the sintering-blast traditional lead smelting process is adopted, which produces a large amount of SO in the production process. 2 And lead dust, serious environmental pollution. The raw material for zinc production is sphalerite with a zinc content greater than 40%, and the acid method of roas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/12C22B13/00C22B19/00C25C1/16C25C1/18
CPCY02P10/20
Inventor 赵由才郭翠香易天晟刘清张承龙
Owner 昆明同越科技开发有限公司
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