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Method for smelting and recovering lead and gold from reduction and sulfur fixation molten pool based on refractory gold ores and lead-containing residue raw materials

A technology for refractory gold ore and molten pool smelting, which is applied in the improvement of process efficiency, photography process, instruments, etc., can solve the problems of heavy pollution and large energy consumption, and achieve the effect of simple process and low cost.

Active Publication Date: 2015-01-28
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these lead secondary materials are smelted by reverberatory furnace or sintering-blast furnace method, which also has serious problems such as heavy pollution and high energy consumption.

Method used

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  • Method for smelting and recovering lead and gold from reduction and sulfur fixation molten pool based on refractory gold ores and lead-containing residue raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Gold ore with high sulfur content (with a particle size range of 0.08-0.5mm), lead sulfide concentrate (with a particle size range of 0.05-5mm), iron oxide ore (with a particle size range of 0.08-5mm) and limestone (with a particle size range of 2~15mm) powders are mixed, granulated and dried until the moisture content is about 8%, and the pellets with a particle size of about 20mm are obtained; the main components of the pellets are Pb21.01%, SiO 2 11.86%, FeO11.67%, CaO5.27%, S10.63%, Au10g / t. Gained pellets are mixed with coking coal (the quality is 14% of the pellet mass, and the particle diameter is 10 to 20 mm), and then they are added to the oxygen bottom-blown furnace and heated at 180 Nm 3 The rate per ton of pellets is passed into oxygen-enriched air with an oxygen volume percentage of 35%, and smelted at a high temperature of 1200-1300°C for 50 minutes to obtain smelting slag, crude lead, iron matte and flue gas; the crude lead alloy contains gold 135g / t, th...

Embodiment 2

[0031] Gold ore with high carbon content (with a particle size range of 0.1-1mm), hydrometallurgy slag (with a particle size range of 0.1-10mm), iron oxide ore (with a particle size range of 1-10mm) and limestone (with a particle size range of 2-15mm) powders are mixed, granulated and dried until the moisture content is about 10%, and the pellets with a particle size of about 15mm are obtained; the main components of the pellets are Pb15.8%, SiO 2 20.96%, FeO20.09%, CaO10.44%, S20.3%, Au14g / t. Gained pellets are mixed with coking coal (the quality is 12% of the pellet mass, and the particle diameter is 15 to 25 mm), and then they are added to the bottom-blown oxygen furnace and heated at 150 Nm 3The rate per ton of pellets is fed with oxygen-enriched air with an oxygen volume percentage of 60%, and smelted at a high temperature of 1150-1250°C for 80 minutes to obtain smelting slag, crude lead, iron matte and flue gas; the crude lead alloy contains gold 157g / t, the gold alloyi...

Embodiment 3

[0033] The arsenic-containing gold ore (with a particle size range of 0.05-1 mm), lead-acid battery mud (with a particle size range of 1-10 mm), pyrite slag (with a particle size range of 1-10 mm) and river sand (with a particle size of range of 5 to 15mm) powders are mixed, granulated and dried until the moisture content is about 6%, to obtain pellets with a particle size of about 15mm; the main components of the prepared pellets are Pb18.30%, Zn13%, SiO 2 19.23%, FeO21.93%, CaO10.83%, S20.12%, As2%, Au15g / t. Gained pellets are mixed with coking coal (the quality is 10% of the pellet mass, and the particle diameter is 10-25 mm), and then they are added to the bottom-blown oxygen furnace and heated at 180 Nm 3 The rate per ton of pellets is fed into oxygen-enriched air with an oxygen volume percentage of 80%, and smelted at a high temperature of 1100-1200°C for 50 minutes to obtain smelting slag, crude lead, iron matte and flue gas; the crude lead alloy contains gold 163g / t, ...

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Abstract

The invention discloses a method for smelting and recovering lead and gold from a reduction and sulfur fixation molten pool based on refractory gold ores and lead-containing residue raw materials. The method comprises the following steps: after mixing the refractory gold ores, the lead-containing material, an iron-containing sulfur-fixing agent and flux powder, granulating and drying to obtain aggregates; mixing the aggregates with a carbon reducing agent, adding into an oxygen bottom blowing furnace and introducing oxygen-enriching to smelt to obtain smelting slag, coarse lead, iron matte and smoke; mainly recovering gold and lead from coarse lead, wherein the gold recovery rate is greater than 99% and the lead recovery rate is greater than 95%; using smelting slag as a high silicon material of cement or construction; recovering valuable metals from smoke and emptying; and boiling and roasting iron matte, recovering scum and preparing acids by using sulfur dioxide tail gas, so that resources are comprehensively recycled. The method is simple to operate and low in cost and can be used for satisfying industrial production.

Description

technical field [0001] The invention relates to a method for recovering lead and gold based on refractory gold ore and lead-containing waste slag raw materials reduction and sulfur-fixing molten pool smelting, which belongs to the technical field of gold ore smelting. Background technique [0002] At present, when refining complex and difficult gold concentrates containing arsenic, carbon, copper, and fine particles, the extraction methods used at home and abroad mainly include: boiling oxidation roasting method, pressure leaching pre-oxidation, bacterial pre-oxidation, etc. Oxidative cyanidation gold extraction method, etc. However, the above methods have problems such as large pollution, high cost requirements, long processing period and low adaptability to raw ore, and only focus on gold recovery, while seldom considering other valuable metals commonly found in gold mines . Therefore, it has become an inevitable trend to develop a high-efficiency and clean process for r...

Claims

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Application Information

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IPC IPC(8): C22B5/10C22B1/14C22B7/00C22B11/00C22B13/00C25C1/18
CPCY02P10/20
Inventor 刘维覃文庆蔡练兵焦芬刘三军罗虹霖
Owner CENT SOUTH UNIV
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