Treatment method of gold and silver pyrite

A treatment method and technology of pyrite, which is applied in the field of gold-silver pyrite treatment, can solve problems such as incapable enterprises, high investment costs, and no application manufacturers, etc., and achieve reduced processing scale, short process flow, and equipment efficiency high effect

Inactive Publication Date: 2015-08-05
柳州华锡有色设计研究院有限责任公司
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  • Claims
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Problems solved by technology

This method has mature technology, sulfur element is transformed into industrial sulfuric acid products, and the heat released in the roasting process is recycled, iron element is transformed into iron oxide slag, gold and silver are recovered step by step from volatile matter, and the technology is mature; but this method Adding chlorides will cause serious corrosion to production equipment, strict anti-corrosion requirements for equipment, high investment costs, poor production site environment, difficult wastewater treatment, iron oxide slag is affected by chlorides, and the market price is reduced
Under the conditions of the new environmental protection policy, this method can no longer achieve economic benefits for the enterprise, and there are no application manufacturers

Method used

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  • Treatment method of gold and silver pyrite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A processing method of gold-silver pyrite, such as figure 1 shown, including the following steps:

[0031] (1) Oxidation smelting: the gold-silver pyrite containing mass percentages of 0.0001% gold, 0.005% silver, 30% iron and 32% sulfur is added to the Australian mine with an inner diameter of 4 meters at a rate of 12 tons / hour. Smelt furnace, while injecting O at a rate of 30,000 standard cubic meters per hour 2 Air with a volume percentage of 21% is oxidized and smelted at 1200°C to obtain 29,000 standard cubic meters per hour containing SO 2 High-temperature flue gas with a volume percentage of 7%, 7.7 tons / hour of ferrous oxide molten slag, and 0.6 tons / hour of gold-silver matte iron with mass percentages of 0.002% gold and 0.1% silver respectively;

[0032] (2) High-temperature flue gas treatment: use the waste heat boiler to recover the waste heat from the high-temperature flue gas obtained in step (1), and obtain 7 tons / hour of superheated steam with a tempera...

Embodiment 2

[0036] A processing method of gold-silver pyrite, such as figure 1 shown, including the following steps:

[0037] (1) Oxidation smelting: the gold-silver pyrite containing mass percentages of 0.001% gold, 0.025% silver, 40% iron, and 42% sulfur is added to the hearth area of ​​60 square meters at a rate of 20 tons / hour. Bottom-blown furnace, while injecting O-containing gas at a rate of 36,000 2 Oxygen-enriched air with a volume percentage of 32% is oxidized and smelted at 1300°C to obtain 33,000 standard cubic meters per hour containing SO 2 High-temperature flue gas with a volume percentage of 16%, 13.4 tons / hour of ferrous oxide molten slag, and 1.08 tons / hour of gold and silver matte iron with mass percentages of 0.018% gold and 0.45% silver respectively;

[0038] (2) High-temperature flue gas treatment: use the waste heat boiler to recover the waste heat from the high-temperature flue gas obtained in step (1), and obtain 7 tons / hour of superheated steam with a temperatu...

Embodiment 3

[0042] A processing method of gold-silver pyrite, such as figure 1 shown, including the following steps:

[0043] (1) Oxidation smelting: the gold-silver pyrite containing mass percentages of 0.003% gold, 0.05% silver, 48% iron, and 52% sulfur is added to the moxa with an inner diameter of 5.4 meters at a speed of 30 tons / hour. Sa furnace, at the same time at the speed of 50000 standard cubic meters per hour into the O-containing 2 Oxygen-enriched air with a mass percentage of 48% is oxidized and smelted at 1400°C to obtain 47,000 standard cubic meters per hour containing SO 2 High-temperature flue gas with a mass percentage of 20%, 17.2 tons / hour of ferrous oxide molten slag, and 1.47 tons / hour of gold and silver matte iron with a mass percentage of 0.06% gold and 1.0% silver respectively;

[0044] (2) High-temperature flue gas treatment: use the waste heat boiler to recover the waste heat from the high-temperature flue gas obtained in step (1), and obtain 9 tons / hour of su...

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Abstract

The invention discloses a treatment method of gold and silver pyrite, and belongs to the field of resource development and metal smelting. The method comprises the following steps: (1) performing oxidation smelting: performing oxidation smelting on the gold and silver pyrite to obtain high-temperature smoke, ferrous oxide melting slag and gold and silver sulfurous iron; (2) treating the high-temperature smoke: recovering after heat of the high-temperature smoke obtained by the step (1) to prepare sulfuric acid, wherein tail gas from acid production is discharged up to the standard; (3) treating the smelting slag: casting the ferrous oxide melting slag obtained by the step (1) into blocks, naturally cooling to obtain ferrous oxide slag blocks and selling; (4) converting the obtained gold and silver sulfurous iron obtained by the step (1) to obtain converting slag and gold and silver alloy, returning the converting slag to the step (1) for oxidation smelting together with the gold and silver sulfurous iron, and selling the gold and silver alloy. The method has the advantages of short process flow, small investment and land occupation, high production efficiency, low production cost, high gold and silver recovery rate, clean and environment-friendly production process and the like.

Description

technical field [0001] The invention discloses a gold-silver pyrite treatment method, which belongs to the field of resource development and metal smelting. Background technique [0002] Pyrite, also commonly known as pyrite, has a molecular formula of FeS 2 , that is, ferrous disulfide, with a theoretical maximum sulfur content of 53.3% and iron 46.7%. However, in actual minerals, due to the presence of other impurity elements, such as oxygen, silicon, calcium, aluminum, arsenic, etc., pyrite generally contains 32-52% sulfur and 30-47% iron. Pyrite ore formed under special geological conditions, or in the beneficiation process of some non-ferrous metals, will produce pyrite containing gold and silver. Gold-silver pyrite generally contains 0.0001-0.0030% gold and 0.005-0.050% silver. [0003] In gold-silver pyrite, not only sulfur and iron elements have recycling value, but also gold and silver elements have recycling value. Therefore, the methods for processing gold-sil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/00C21B11/00C22B11/00
CPCY02P10/20
Inventor 陶政修杨奕旗黄锦庆
Owner 柳州华锡有色设计研究院有限责任公司
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