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Method for recovering gold and lead by smelting refractory gold ore and lead-containing waste residue raw materials through oxygen enrichment molten pool

A technology for smelting and refractory gold ore in an oxygen-enriched molten pool, applied in the field of gold smelting, can solve the problems of sluggish resources, pollution, high energy consumption, etc., and achieve the effects of low cost and simple process

Active Publication Date: 2015-01-07
湖南锐异资环科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these lead waste residues are smelted by reverberatory furnace or sintering-blast furnace earth method, which has serious pollution and high energy consumption, so most of these resources are still in a "sluggish" state

Method used

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  • Method for recovering gold and lead by smelting refractory gold ore and lead-containing waste residue raw materials through oxygen enrichment molten pool

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Mix high-sulfur gold ore (with a particle size range of 0.08-0.5mm), hydrometallurgy slag (with a particle size range of 0.05-5mm) and limestone (with a particle size range of 2-15mm) evenly, then granulate and dry When the moisture content is about 8%, pellets with a particle size of about 20mm are obtained; the main components of the pellets are Pb20.01%, SiO 2 10.86%, FeO10.67%, CaO5.07%, S10.63%, Au10g / t; the obtained pellets are placed in an oxygen bottom-blown furnace, with 180Nm 3 The rate of each ton of pellets is fed with oxygen-enriched air with an oxygen volume percentage of 40%, and oxidized and smelted at a high temperature of 1100-1200°C for 100 minutes to obtain flue gas, crude lead and high-lead slag with a sulfur dioxide concentration greater than 20% by volume. Gained high-lead slag joins in the reduction furnace, sprays into coal dust (coal powder addition is 100kg per ton high-lead slag, granularity is 0.1~0.8mm) in reduction furnace, simultaneously...

Embodiment 2

[0037] After mixing high-carbon gold ore (with a particle size range of 0.1-1mm), lead-acid battery mud (with a particle size range of 1-8mm) and river sand (with a particle size range of 2-10mm) powders, granulate and dry to The moisture content is about 8%, and the pellets with a particle size of about 25mm are obtained; the main components of the pellets are Pb15.8%, SiO 2 20.96%, FeO20.09%, CaO10.44%, S20.3%, Au14g / t; the obtained pellets are placed in an oxygen bottom-blown furnace, with 120Nm 3 The rate per ton of pellets is passed into oxygen-enriched air with an oxygen volume percentage of 80%, and oxidized and smelted at a high temperature of 1150-1250°C for 60 minutes to obtain flue gas, crude lead and high-lead slag with a sulfur dioxide concentration greater than 20% by volume. ; Gained high lead slag joins in the reduction furnace, in the reduction furnace with 40Nm 3 The amount of high lead slag per ton is fed into natural gas, and at the same time, 60Nm 3 The...

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Abstract

The invention discloses a method for recovering gold and lead by smelting refractory gold ore and lead-containing waste residue raw materials through an oxygen enrichment molten pool. The method comprises the following steps: uniformly mixing the refractory gold ore, lead-containing materials and a fusing agent, pelleting and drying, so as to obtain granular materials; performing oxidizing smelting on the obtained granular materials through an oxygen bottom blowing furnace to obtain sulphur dioxide smoke gas, lead bullion and high lead skim, and performing reduction smelting on the high lead skim in a reduction furnace to obtain slag and lead bullion; and performing electrolytic refining on the lead bullion to obtain refined lead and gold-bearing anode slime, wherein the gold recovering rate is larger than 99%, the lead recovering rate is larger than 95%, sulphur is removed in the form of the sulphur dioxide smoke gas, and the removing rate reaches 95% above. The slag is used as high-silicon mixed ingredients for cement or construction, after the sulphur dioxide smoke gas is subjected to dust removal to recycle valuable metals, the sulphur dioxide smoke gas is used for preparing acid, resources are sufficiently and comprehensively recycled, and the environmental protection and economy are achieved. The method is simple in operation and low in cost, and the method can be applied to large-scale industrial production.

Description

technical field [0001] The invention relates to a method for recovering gold and lead by smelting and recovering gold and lead in an oxygen-enriched molten pool of refractory gold ore and lead-containing waste slag raw materials, belonging to the technical field of gold smelting. Background technique [0002] With the rapid development of the gold industry, the gold ore resources are constantly being developed, and the easy-to-handle gold ore resources are gradually exhausted. The complex and difficult-to-handle gold ore resources have become the main raw materials of my country's gold industry. At the same time, the research on its dressing and smelting has also become a focus . Complex and refractory gold ore resources account for an increasing proportion of my country's proven gold ore resources, exceeding 1 / 4 of the proven reserves. Among them, Guizhou, Yunnan, Sichuan, Gansu, Qinghai, Inner Mongolia, Guangxi, Shaanxi and other western provinces account for a larger prop...

Claims

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Application Information

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IPC IPC(8): C22B13/02C22B7/00C22B11/00C25C1/18C25C1/20
CPCY02P10/20
Inventor 刘维覃文庆蔡练兵焦芬刘三军罗虹霖
Owner 湖南锐异资环科技有限公司
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