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Method for recovering lead from iron-containing lead smelting slag

A lead slag and rough concentrate technology, applied in the field of lead recovery, can solve the problems of environmental pollution, high treatment cost, difficult recovery, etc., and achieve the effects of non-toxic and pollution-free environment, simple process structure and high lead recovery rate.

Inactive Publication Date: 2011-01-19
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high-temperature treatment of minerals, the chemical composition of various substances in lead slag is complex, and various metal ions are doped with each other, so it is difficult to recover useful metals.
At present, the acid leaching method is generally used for recovery, but this method consumes a lot of acid, has high processing costs, and seriously pollutes the environment. In addition, during the acid leaching process, other metal ions react with the acid to cause high impurity content.

Method used

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Examples

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Effect test

Embodiment 1

[0012] This embodiment is an application example of the method for recovering lead from iron-containing smelting lead slag.

[0013] 1. Composition and content of mineral raw materials:

[0014] The content of lead in a lead slag in Yunnan is 4.87% by weight, 8.93% iron, 20.35% silicon, and 1.27% zinc. Among them, iron exists in lead in the form of ions, most of the lead exists in lead metal, and a small amount of lead sulfate exists. Iron oxide and ferrous oxide exist, silicon mainly exists as silicon dioxide, and zinc mainly exists as zinc ferrite.

[0015] 2. Flotation agents and operating conditions:

[0016] Grind the above-mentioned lead slag to -200 mesh to account for 80%, and use a strong magnetic separator to magnetically separate the lead coarse concentrate under the condition of a magnetic field strength of 4000 gauss. Concentrate for lead collection, use lime to adjust the pH of the slurry to 8.5-9 during flotation, use 1500g / t of sodium sulfide and 250g / t of is...

Embodiment 2

[0018] This embodiment is another application example of the method for recovering lead from iron-containing smelting lead slag.

[0019] 1. Composition and content of mineral raw materials:

[0020] The content of lead in a lead slag in Guangxi is 5.63% by weight, 9.61% iron, 23.54% silicon, and 0.73% zinc. Among them, lead mainly exists as lead oxide and a small amount of lead sulfate, iron exists as ferric oxide and ferrous oxide, and some iron ions Doped in lead, silicon is mainly silicon dioxide, zinc is mainly zinc sulfate, and a small amount of zinc ferrite.

[0021] 2. Flotation agents and operating conditions:

[0022] Grind the above-mentioned lead slag to -200 mesh to account for 80%, and use a strong magnetic separator to magnetically separate the lead coarse concentrate under the condition of a magnetic field strength of 5000 gauss. Concentrate for lead collection, use lime to adjust the pH of the slurry to 8.5-9 during flotation, use 2000g / t of sodium sulfide a...

Embodiment 3

[0024] This embodiment is another application example of the method for recovering lead from iron-containing smelting lead slag.

[0025] 1. Composition and content of mineral raw materials:

[0026] The lead content in a lead slag in Hunan is wt%: 7.58%, iron 6.92%, silicon 15.72%, zinc 0.95%, in which lead mainly exists as lead oxide, a small amount of lead sulfate exists, iron exists as iron oxide, and iron ions are doped in lead Among them, silicon is mainly silicon dioxide, and zinc mainly exists as zinc ferrite.

[0027] 2. Flotation agents and operating conditions:

[0028] Grind the above-mentioned lead slag to -200 mesh to account for 80%, and use a strong magnetic separator to magnetically separate the lead coarse concentrate under the condition of a magnetic field strength of 6000 gauss. Concentrate for lead collection, use lime to adjust the pH of the slurry to 8.5-9 during flotation, use 3000g / t of sodium sulfide and 300g / t of isoamyl xanthate in the primary rou...

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Abstract

The invention discloses a method for recovering lead from iron-containing lead smelting slag. After the iron-containing lead smelting slag is ground into the situation that the slag of -200 meshes accounts for 80%, a strong magnetic separator is adopted to carry out magnetic separation to obtain the rough concentrate of lead under the magnetic field intensity of 4000-6000 Gaussian; the rough concentrate of lead takes lime as ore pulp pH conditioning agent, sodium sulfide as activator, isoamyl xanthate as collecting agent and 2#oil as foaming agent for lead collection. During flotation, lime is used for adjusting pH of the ore pulp to 8.5-9; and in the flotation process, the dosage of sodium sulfide is 2000-4000g / t, the dosage of isoamyl xanthate is 350-500g / t, and the dosage of the 2#oil is 100-120 g / t. The invention can effectively recover lead in the iron-containing lead smelting slag and obtains high lead recovery. In addition, the invention has simple flow, small energy consumption and no toxin and pollution on environment.

Description

1. Technical field [0001] The invention relates to the technical field of nonferrous metal smelting, in particular to a method for recovering lead from iron-containing smelting lead slag. 2. Background technology [0002] In the process of lead smelting, most lead minerals form lead metal due to high temperature, and a small part of lead forms lead slag with various metals or non-metals. Its main chemical components are Pb, Si, Fe, CaO, and a small amount of S, al 2 o 3 , MgO, Au, Zn, Ag, etc. Due to the high temperature treatment of minerals, the chemical composition of various substances in lead slag is complex, and various metal ions are doped with each other, so it is difficult to recover useful metals. At present, the acid leaching method is generally used for recovery, but this method consumes a lot of acid, has high processing costs, and seriously pollutes the environment. In addition, during the acid leaching process, other metal ions react with the acid to cause ...

Claims

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Application Information

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IPC IPC(8): C22B13/00
Inventor 陈建华魏宗武穆枭陈晔兰丽红
Owner GUANGXI UNIV
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