A technology for pretreatment of complex and refractory gold concentrates by industrial microwave

A technology for refractory gold and industrial microwave, which is applied in the field of industrial microwave pretreatment of complex and refractory gold concentrate and gold smelting to achieve the effects of promoting decomposition and oxidation, reducing activation energy and shortening the process flow

Inactive Publication Date: 2018-07-27
托里县招金北疆矿业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a kind of process technology of complex refractory gold concentrate with industrial microwave pretreatment in view of the existing problems in the prior art

Method used

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  • A technology for pretreatment of complex and refractory gold concentrates by industrial microwave
  • A technology for pretreatment of complex and refractory gold concentrates by industrial microwave
  • A technology for pretreatment of complex and refractory gold concentrates by industrial microwave

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: A kind of process technology of complex refractory gold concentrate with industrial microwave pretreatment, described technical process is carried out according to the following steps: the first step puts complex refractory gold concentrate into continuous horizontal belt type industrial microwave oven shop The thickness of the ore layer is 25-100mm. Turn on the fan of the microwave oven and let in the air. In the second step, start the microwave heating device to dry and roast the complex and refractory gold concentrate obtained in the first step. The microwave frequency in the drying section is controlled. The microwave source is 915MHz, the power level of the single tube of the microwave source is 3kW, 5kW, the temperature of the drying section is controlled at 120°C ~ 140°C, and the drying time is 5 ~ 10 minutes; the microwave frequency of the roasting section is controlled at 915MHz, and the power of the single tube of the microwave source is The stage...

Embodiment 2

[0020] Embodiment 2: A kind of process technology of complex refractory gold concentrate with industrial microwave pretreatment, described technical process is carried out according to the following steps: the first step puts complex refractory gold concentrate into continuous horizontal belt-type industrial microwave oven shop The thickness of the ore layer is 25-100mm. Turn on the fan of the microwave oven and let in the air. In the second step, start the microwave heating device to dry and roast the complex and refractory gold concentrate obtained in the first step. The microwave frequency in the drying section is controlled. The microwave source is 915MHz, the single-tube power level of the microwave source is 5kW, 10kW, the temperature of the drying section is controlled at 140°C-160°C, and the drying time is 10-15 minutes; the microwave frequency of the roasting section is controlled at 915MHz, and the power level of the single-tube microwave source is The grades are 20kW...

Embodiment 3

[0022] Embodiment 3: A kind of process technology of complex refractory gold concentrate with industrial microwave pretreatment, described technical process is carried out according to the following steps: the first step puts complex refractory gold concentrate into continuous horizontal belt type industrial microwave oven shop The thickness of the ore layer is 25-100mm. Turn on the fan of the microwave oven and let in the air. In the second step, start the microwave heating device to dry and roast the complex and refractory gold concentrate obtained in the first step. The microwave frequency in the drying section is controlled. The microwave source is 2450MHz, the single-tube power level of the microwave source is 1kW, 5kW, the temperature of the drying section is controlled at 160°C-200°C, and the drying time is 15-20 minutes; the microwave frequency of the roasting section is controlled at 2450MHz, and the power level of the single-tube microwave source is The stage is 50kW,...

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Abstract

The invention relates to a technology for pretreating complex and difficult-to-treat gold concentrate through utilizing industrial microware. The technology comprises the steps of putting the complex and difficult-to-treat gold concentrate in an industrial microwave oven, and paving the complex and difficult-to-treat gold concentrate; starting a microwave oven fan, and introducing air; starting a microwave heating device to sequentially dry and bake the complex and difficult-to-treat gold concentrate; sending obtained flue gas into a recycling system to recycle As2O3 and SO2, so as to prepare arsenic and arsenic; and sending obtained hot gold concentrate to a cyanide leaching system to recycle valuable metals such as gold and silver. According to the technology, the leaching rate of gold can be greatly increased, the operation is easy, the technological process is short, the reaction temperature is decreased, the reaction time is shortened, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a technology for pretreating complex and refractory gold concentrates with industrial microwaves, and belongs to the field of gold smelting industry. Background technique [0002] With the development of the gold industry, domestic easy-to-handle gold mines have basically been exhausted, and the scope of development has rapidly developed from single, easy-to-handle gold resources to high-arsenic, high-carbon, low-sulfur, and polymetallic-containing refractory gold resources In the field, the occurrence state of gold in ores is mainly gold in dispersed state, colloidal gold, lattice gold or solid solution gold in gold-bearing minerals. Arsenopyrite (FeAsS) and pyrite (FeS 2 ) is the main gold-bearing mineral, and gold is usually wrapped in it or impregnated in crystals in fine grains or microscopic state. Using the conventional cyanidation gold extraction method, the direct gold leaching rate is generally below 80%, and some e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02C22B11/08C01B17/50C01G28/00
CPCC01B17/50C01G28/005C22B1/02C22B11/08
Inventor 杨悦增刘洪晓宋裕华冷启龙张敬闯
Owner 托里县招金北疆矿业有限公司
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