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A comprehensive treatment method for smelting smoke and dust containing miscellaneous gold concentrate

A technology for comprehensive treatment of gold concentrates, applied in chemical instruments and methods, iron compounds, process efficiency improvement, etc., can solve problems such as pollution, waste of valuable element resources and the environment, and achieve the promotion of hydrolysis reaction, improvement of recovery, process efficiency short process effect

Active Publication Date: 2019-04-12
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the problems in the prior art that it is difficult to effectively treat the smoke and dust of pyro-smelting gold-containing concentrates, thereby resulting in the waste of valuable element resources and environmental pollution, and provides a kind of smoke and dust from the smelting of gold-containing concentrates. comprehensive treatment method

Method used

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  • A comprehensive treatment method for smelting smoke and dust containing miscellaneous gold concentrate
  • A comprehensive treatment method for smelting smoke and dust containing miscellaneous gold concentrate
  • A comprehensive treatment method for smelting smoke and dust containing miscellaneous gold concentrate

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Effect test

Embodiment 1

[0062] The comprehensive processing method of the miscellaneous gold concentrate smelting dust of the present embodiment comprises the following steps:

[0063] Step 1. Enhanced leaching of smelting dust

[0064] Add 500ml of 4mol / L hydrochloric acid into a 1L beaker, put it in a water bath to fix it and turn on the stirring, control the temperature of the water bath to 60°C, accurately weigh 100.00g of smelting dust containing gold concentrate and slowly add it to the beaker, stir and leaching for 1h, smelting The analysis results of the soot components are shown in Table 1. It can be seen from the table that the contents of antimony and arsenic in the soot to be treated are relatively high.

[0065] Step 2. Reduction of high-valent antimony in leaching pulp and hydrolysis of antimony

[0066] After the above reaction is completed, maintain the leached pulp temperature of 60°C and the mass ratio of leached liquid to solid, add 1.0g antimony powder and react for 0.5h, transfe...

Embodiment 2

[0080] The comprehensive treatment method for pyro-smelting dust of miscellaneous gold-containing concentrates of the present embodiment comprises the following steps:

[0081] Step 1. Enhanced leaching of smelting dust

[0082] Add 500ml of 8mol / L hydrochloric acid into an acid-resistant reaction vessel with a heating and stirring device, then accurately weigh complex gold concentrate smelting fume and slowly add it to the reaction vessel according to the liquid-solid mass ratio of 8:1, control the leaching temperature to 40°C, and stir Leach for 2h.

[0083] Step 2. Reduction of high-valent antimony in leaching pulp and hydrolysis of antimony

[0084] After the above reaction, maintain the leach pulp temperature and leach liquid-solid mass ratio, add antimony which is 1.2 times the stoichiometric number of pentavalent antimony to the leach pulp and react for 0.5h, then transfer the above pulp to a beaker, slowly add the total volume of leached pulp 4.0 Water at 25°C, hydro...

Embodiment 3

[0093] The comprehensive treatment method for pyro-smelting dust of miscellaneous gold-containing concentrates of the present embodiment comprises the following steps:

[0094] Step 1. Enhanced leaching of smelting dust

[0095] Add 500ml of 2mol / L hydrochloric acid into an acid-resistant reaction vessel with a heating and stirring device, then accurately weigh complex gold concentrate smelting fumes according to the liquid-solid mass ratio of 3:1 and slowly add them to the reaction vessel, control the leaching temperature to 85°C, and stir Leach for 0.5h.

[0096] Step 2. Reduction of high-valent antimony in leaching pulp and hydrolysis of antimony

[0097] After the above reaction, maintain the leach pulp temperature and leach liquid-solid mass ratio, add antimony with 1.1 times the stoichiometric number of pentavalent antimony to the leach pulp and react for 1.5h, then transfer the above pulp to a beaker, and slowly add the leach pulp with a total volume of 3.0 Water at 2...

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Abstract

The invention discloses a comprehensive treatment method for smelting dust containing miscellaneous gold concentrate and belongs to the technical field of precious metal pyrometallurgy. The comprehensive treatment method for the smelting dust containing the miscellaneous gold concentrate comprises the steps that firstly, the smelting dust is subjected to primary hydrochloric acid leaching, leachedslurry is subjected to high-price antimony reduction and hydrolysis antimony fixing, high-antimony gold concentrate and primarily-hydrolyzed liquid are obtained, secondary hydrochloric acid leachingis conducted on the high-antimony gold concentrate, high-grade gold concentrate with low impurities and secondary lixivium are obtained, high-grade oxychloride and secondarily-hydrolyzed liquid are obtained after hydrolysis is conducted on the secondary lixivium, dechlorinating transformation is conducted on the oxychloride, and then an antimony white terminal product is obtained; and a molysite arsenic fixing process is adopted for arsenic-containing liquid, and stable low-toxicity arsenic compound ferric arsenate and arsenic-removed liquid are obtained. By the adoption of the method, the smelting dust containing the miscellaneous gold concentrate is treated, the precise metal antimony can be effectively recovered, and the harmful element arsenate is fixed, so that the industrial problemthat arsenic and antimony dust is difficult to treat is solved.

Description

technical field [0001] The invention belongs to the technical field of pyro-smelting of precious metals, and in particular relates to a process for separating gold concentrates from pyro-smelting flue dust of miscellaneous gold concentrates, recovering valuable metal antimony, and harmlessly treating toxic element arsenic. Background technique [0002] About 30% of my country's gold resources are refractory gold sulfide ores. Gold mainly exists in the state of fine particle dissemination in sulfide minerals, usually wrapped by pyrite, arsenopyrite or pyrrhotite, resulting in a high cyanide leaching rate of gold. In addition, gold minerals such as carbonaceous ore, antimonide ore and telluride ore have a low wet recovery rate of gold due to the "gold-robbing" effect of carbon or the packaging of non-ferrous metals. There are many reports on the study of refractory gold ores, mainly including wet and pyrotechnics. [0003] Among them, the wet process mainly uses methods such a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/02C22B11/00C22B30/02C22B13/00C01G49/00
CPCC01G49/00C22B7/007C22B7/02C22B11/042C22B13/045C22B30/02Y02P10/20
Inventor 张福元魏昊赵卓徐亮樊友奇童碧海
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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