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Method for smelting of ore from Carlin-type gold deposit

A smelting method and Carlin-type technology, which is applied in the field of smelting and extracting gold in Carlin-type gold mines, can solve the problems of refractory smelting, secondary pollution from smelting slag, and high processing costs, and achieve good environmental protection, high maintenance costs, and high processing costs. A large amount of effect

Inactive Publication Date: 2012-01-11
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the characteristics of difficult separation and smelting of the components of Carlin-type gold ore, the processing cost is high, and the smelting slag produced will cause secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Treatment of Carlin-type gold ore by lead-oxygen-enriched flash smelting process. Mixing with lead concentrate and zinc hydrosmelting slag, in which the amount of Carlin-type gold ore added is 30% of the total mass of lead concentrate and zinc hydrosmelting slag, and directly mixed with 5% coke by mass , the coke particle size is 5-40mm, and then according to the Fe:SiO in the final mixture 2 The mass ratio is 1.1:1 and CaO:SiO 2 Pyrite and lime are added at a mass ratio of 0.6:1 to form a final mixture consisting of Pb22.86%, SiO 2 18.24%, Fe16.03%, CaO 12.29%, S 20.6%, Au 15g / t, Ag 1000g / t, the final mixture is ground to less than 1mm, and then the mixture is sent into the flash smelting reactor , Oxygen-enriched flash smelting is carried out at 1300-1400°C, and crude lead containing 66.2g / t of gold and smelting slag without gold are produced; the gold recovery rate reaches 99.6%, and the smelting slag can be used to make cement.

Embodiment 2

[0020] Treatment of Carlin-type gold ore by lead-oxygen-enriched flash smelting process. It is mixed with lead concentrate and zinc hydrosmelting slag. The amount of Carlin-type gold ore added is 10% of the total mass of lead concentrate and zinc hydrosmelting slag. Zinc smelting slag Anthracite with a total mass of 4% of the total mass of two lead-containing raw materials, the particle size of the anthracite is 1.5-35 mm, and then according to the Fe:SiO in the final mixture 2 The mass ratio is 1:1 and CaO:SiO 2 Add pyrite and lime at a mass ratio of 0.6:1 to form a final mixture consisting of Pb32.9%, Zn6.03%, SiO 2 12.1%, Fe12.1%, CaO7.26%, S16.2%, Cu0.2%, Au 3g / t, Ag 500g / t, the final mixture is ground to less than 1mm, and then the mixture is used Put it into the oxygen-enriched flash smelting furnace, and smelt under the oxygen-enriched condition of 1250-1450°C to produce crude lead and smelting slag with a gold content of 13.4g / t; the gold recovery rate reaches 99.8%,...

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Abstract

The invention discloses a method for smelting of ore from a Carlin-type gold deposit, and relates to a method for smelting extraction of gold from a Carlin-type gold deposit. The method is characterized in that during smelting, ore from a Carlin-type gold deposit is added into a lead smelting raw material for smelting to form crude lead rich in gold and silver; and gold and silver are separated and recovered from the crude lead. The method for smelting of ore from a Carlin-type gold deposit comprises the following steps of mixing ore from a Carlin-type gold deposit and one or more of oxygen-rich lead flash smelting raw materials such as lead concentrate, residues from wet zinc smelting, lead-containing residues from wet copper smelting or lead precious metal system residues, and carrying out self-heating smelting oxidation and reduction treatment on the mixture to obtain waste residues and crude lead rich in gold and silver, wherein the waste residues are utilized for manufacture of cement and recovery rates of gold and silver are greater than 99.5%.

Description

technical field [0001] The invention relates to a method for smelting Carlin-type gold ore, relating to a method for smelting and extracting Carlin-type gold ore. technical background [0002] The total amount of mineral resources in the world is decreasing year by year, and the situation is becoming more and more severe, and gold mines are no exception. The proportion of gold-rich ore and easy-to-handle gold ore in gold production is also declining year by year, and the utilization of lean ore and refractory gold ore is becoming more and more important, and has now become the main source of raw materials for gold-producing countries. [0003] Carlin-type gold deposits, also known as fine disseminated gold deposits or fine disseminated gold deposits containing sedimentary rocks, are refractory primary gold deposits first discovered in Nevada, western United States in the early 1960s. Since the discovery of Carlin-type gold deposits in the southwestern region of Guizhou Prov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/02
Inventor 王成彦郜伟尹飞陈永强宋元张郑晓斌梁德华崔成旺李强邢鹏杨永强王军杨卜
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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