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A method for treating complex gold concentrate cyanidation tailings by microwave chlorination roasting volatilization

A technology of cyanidation tailings and chlorination roasting, applied in the direction of improving process efficiency, etc., can solve the problems of increasing the risk of secondary pollution of cyanide residue, affecting the recovery of valuable metals such as gold, and low recovery rate of valuable metals, and achieving Improve the thermodynamic and kinetic conditions of the reaction, the effect of low water content in the material, and accurate temperature

Inactive Publication Date: 2018-07-27
新疆星塔矿业有限公司
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  • Description
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Problems solved by technology

However, due to the low content of valuable metals in cyanide tailings and the difficulty in recycling, some companies directly sell cyanide tailings to downstream companies at low prices, which not only wastes resources, but also increases the risk of secondary pollution during storage and transportation of cyanide tailings
[0003] CN104404261B discloses "a method for synchronous reduction and recovery of gold and iron by chlorination and roasting of gold concentrate cyanidation tailings", through granulation of cyanide tailings, drying, high-temperature roasting, and wet flue gas recovery of roasting tail gas. Due to the traditional high-temperature roasting method, the high energy consumption and uneven temperature rise in the roasting process lead to local temperature too high and glass body and ring formation; the organic carbon content in the flue gas from the furnace is high, which affects the value of gold in the subsequent flue gas. Metal recovery; process pollution is high, and the recovery rate of valuable metals is low

Method used

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  • A method for treating complex gold concentrate cyanidation tailings by microwave chlorination roasting volatilization

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Effect test

Embodiment 1

[0018] Embodiment 1: a kind of method for processing complex gold concentrate cyanidation tailings with microwave chlorination roasting volatilization, described processing method is carried out according to the following steps: the first step will be equipped with the complex gold concentrate cyanidation tailings of chlorinating agent The slag mixture is sent to the granulator to make pellets to obtain green pellets with a diameter of Φ6~25mm; in the second step, the green pellets obtained in the first step are continuously sent to continuous vertical industrial microwave ovens or continuous horizontal belt industrial In the microwave oven, start the microwave heating device, in which the microwave frequency of the drying section is controlled to 2450MHz, the single-tube power level of the microwave source is 200W, 500W or 1kW, the temperature is controlled at 100°C to 140°C, and the drying time is 30 to 60 minutes; The microwave frequency in the preheating section is controll...

Embodiment 2

[0020] Embodiment 2: a kind of method for processing complex gold concentrate cyanidation tailings with microwave chlorination roasting volatilization, described processing method is carried out according to the following steps: the first step will be furnished with the complex gold concentrate cyanidation tailings of chlorinating agent The slag mixture is sent to the granulator to make pellets to obtain green pellets with a diameter of Φ6~25mm; in the second step, the green pellets obtained in the first step are continuously sent to a continuous vertical industrial microwave oven or a continuous horizontal belt industrial microwave oven , start the microwave heating device, in which the microwave frequency in the drying section is controlled at 915MHz, the single-tube power level of the microwave source is 5kW, the temperature is controlled at 140°C to 160°C, and the drying time is 20 minutes; the microwave frequency in the preheating section is controlled at 915MHz, microwave...

Embodiment 3

[0022] Embodiment 3: a kind of method for processing complex gold concentrate cyanidation tailings with microwave chlorination roasting volatilization, described processing method is carried out according to the following steps: the first step will be furnished with the complex gold concentrate cyanidation tailings of chlorinating agent The slag mixture is sent to the granulator to make pellets to obtain green pellets with a diameter of Φ6~25mm; in the second step, the green pellets obtained in the first step are continuously sent to a continuous vertical industrial microwave oven or a continuous horizontal belt industrial microwave oven , start the microwave heating device, in which the microwave frequency in the drying section is controlled at 915MHz, the single-tube power level of the microwave source is 800W, the temperature is controlled at 180°C to 220°C, and the drying time is 10 to 30 minutes; the microwave frequency in the preheating section is The control is 915MHz, t...

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Abstract

The invention relates to a method for treating complex gold concentrate cyanidation tailings through microwave chloridizing roasting and volatilization. The method comprises the following steps: feeding a complex gold concentrate cyanide tailing mixture containing a chlorinating agent into a disk granulator, so as to obtain green pellets; sending the green pellets into an industrial microwave oven, setting certain temperature and time, and carrying out drying, preheating and roasting volatilization in sequence, so as to obtain volatilized flue gas and hot pellets, wherein the obtained flue gas contains valuable metals such as gold, silver and copper; leading the flue gas into a wet process recovery system via a draught fan for recovery; and sending the hot pellets into a pellet storage yard for sale after cooling. According to the method, the grade of gold in the tailings can be substantially lowered, the operation is easy and the technological process is short, the reaction temperature and time are reduced, and the subsequent treatment of the valuable metals such as gold in the discharged flue gas is relatively easy, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a method for treating complex gold concentrate cyanidation tailings by microwave chlorination roasting volatilization. Background technique [0002] With the large-scale mining of gold mines, the refractory gold ore resources in the world are decreasing day by day, and the refractory gold ore will become the main mineral resources of the gold industry in the future. The gold in refractory gold ores is mainly embedded in pyrite and arsenopyrite lattices, and some valuable metals still remain in the tailings after the cyanide gold extraction method is used. However, due to the low content of valuable metals in cyanide tailings and the difficulty in recycling, some companies directly sell cyanide tailings to downstream companies at low prices, which not only wastes resources, but also increases the risk of secondary pollution during storage and transportation of cyanide tailings . [0003] CN104404261B discloses "a method for sy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/08C22B1/24C22B7/04
CPCC22B1/08C22B1/2406C22B7/002C22B7/04Y02P10/20
Inventor 杨悦增刘洪晓宋裕华冷启龙杨兴庆曹艳军姜永绍范丽虹
Owner 新疆星塔矿业有限公司
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