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Method for treating alkaline gold-extraction tailings by utilizing acid making tail gas

A technology for making acid tail gas and tailings, which is applied in the direction of chemical instruments and methods, non-metallic elements, and improvement of process efficiency. The effect of simple process

Active Publication Date: 2013-09-18
SHANDONG GUODA GOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for treating the tailings of alkaline gold extraction by using the tail gas of acid manufacturing, solve the problem of purification, absorption and treatment of tail gas of acid manufacturing, and the high cost of lye neutralization and treatment, and achieve the purpose of discharge up to the standard. Moreover, the gold and silver valuable metals in the alkaline gold extraction tailings are further recovered, and at the same time, the pollution hazards of the alkaline gold extraction tailings to the surrounding environment are eliminated, and energy saving, economical, environmental protection, and effective comprehensive management are achieved.

Method used

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  • Method for treating alkaline gold-extraction tailings by utilizing acid making tail gas

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Embodiment 1

[0028] A method for treating alkaline gold extraction tailings by using tail gas from acid production, comprising the following steps:

[0029] 1) Analyzing the content of sulfur, arsenic, carbon and other elements in the minerals, configuring gold concentrate containing 15% sulfur, 5% arsenic, and 1% carbon, and then adding water to stir until uniform to obtain a slurry with a concentration of 60% ; (The pulp with a concentration of 60% means that the amount of solid minerals contained in every 100 grams of pulp is 60 grams);

[0030] 2) Spray the 60% ore slurry obtained in step 1) into the roasting furnace, and roast it at a high temperature of 600°C to obtain roasting flue gas and roasted sand. The roasting flue gas is discharged from the roasting furnace Then it enters the first-level cooling dust collector and the second-level cooling dust collector in turn. The roasting flue gas in the first-level cooling dust collector and the dust-laden flue gas in the second-level coo...

Embodiment 2

[0037] A method for treating alkaline gold extraction tailings by using tail gas from acid production, comprising the following steps:

[0038] 1) Analyzing the content of elements such as sulfur, arsenic and carbon in the minerals, configuring gold concentrate containing 25% sulfur, 1% arsenic, and 1% carbon, and then adding water to stir until uniform to obtain a slurry with a concentration of 65% ; (The pulp with a concentration of 65% means that the amount of solid minerals contained in 100 grams of pulp is 65 grams);

[0039] 2) Spray the 65% ore slurry obtained in step 1) into the roasting furnace, and roast it at a high temperature of 650°C to obtain roasting flue gas and calcined sand after roasting. The roasting flue gas is discharged from the roasting furnace Then it enters the first-level cooling dust collector and the second-level cooling dust collector in turn. The roasting flue gas in the first-level cooling dust collector and the dust-laden flue gas in the secon...

Embodiment 3

[0046] A method for treating alkaline gold extraction tailings by using tail gas from acid production, comprising the following steps:

[0047] 1) Configure gold concentrate containing 20% ​​sulfur, 10% arsenic, and 5% carbon, then add water and stir until uniform, and obtain a pulp with a concentration of 70%; (the pulp with a concentration of 70% refers to every 100 grams The amount of solid minerals contained in the pulp is 70 grams);

[0048] 2) Spray the 70% ore slurry obtained in step 1) into the roasting furnace, and roast it at a high temperature of 700°C to obtain roasting flue gas and calcined sand after roasting. The roasting flue gas is discharged from the roasting furnace Then it enters the first-level cooling dust collector and the second-level cooling dust collector in turn. The roasting flue gas in the first-level cooling dust collector and the dust-laden flue gas in the second-level cooling dust collector pass through a flue gas When the cooling device is rap...

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Abstract

The invention relates to a method for treating alkaline gold-extraction tailings by utilizing acid making tail gas. The method is simple and fast in process flow, fully utilizes the acid making tail gas and alkaline gold-extraction tailings to change wastes into valuables, the problems that the acid making tail gas is purified and absorbed and the alkali liquor neutralizing treatment cost is high can be solved, the purpose of standard emission can be achieved, furthermore gold and silver valuable metals in the alkaline gold-extraction tailings can be recovered, the pollution hazard of the alkaline gold-extraction tailings to the ambient environment can be eliminated to achieve energy conservation, economy and environment friendliness, and the economic benefits of enterprises can be improved.

Description

technical field [0001] The invention relates to a method for treating tailings of alkaline gold extraction by using tail gas of an acid production process, and belongs to the technical fields of gold smelting waste residues, chemical industry waste gas treatment, and environmental protection. Background technique [0002] In recent years, in the gold smelting industry, the roasting and cyaniding process is mainly used to process complex gold concentrates containing sulfur, arsenic, carbon, etc., and the gold and silver recovery rate of the direct cyanidation gold extraction process is low. The roasting process in this process is a A pretreatment method for removing sulfur, arsenic, carbon, etc. in minerals, and produces smelting flue gas that meets the requirements of acid production. The acid production tail gas produced after acid production is usually discharged at high altitude or simply treated by a tail gas purification treatment device. ; The cyanidation process is a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B11/08C22B1/02C22B3/24C22B30/04C01B17/74
CPCY02P10/20
Inventor 郭建东吕寿明梁志伟刘金才
Owner SHANDONG GUODA GOLD
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