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Waste rock recycling disposal method for refuse dump

A waste dump and recycling technology, which is applied in the field of disposal of waste rocks in dump dumps, achieves significant environmental benefits, saves storage space, and reduces production

Active Publication Date: 2021-03-19
ZIJIN MINING GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no report on the recovery of copper by in-situ spraying of secondary copper sulfide waste rocks in dump sites

Method used

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Examples

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Effect test

Embodiment 1

[0034] A mine produces 10 million tons of secondary copper sulfide ore each year, including 6 million tons of higher-grade waste rock with a copper grade > 0.05% (average copper grade 0.13%), and 4 million tons of lower-grade waste rock with a copper grade < 0.05% tons (average copper grade 0.036%). The copper minerals are mainly chalcocite and copper blue, containing a small amount of refractory copper minerals, such as pyrite; the content of pyrite is relatively high (average content 5.60%), and copper minerals and pyrite are closely symbiotic; veins The stone minerals are mainly quartz, and the content of acid-consuming gangue is low. The two waste rocks are piled separately. The higher-grade waste rocks are stacked at a height of 15m per layer, and the raffinate is continuously sprayed (sulfuric acid concentration ~ 10g / L, iron ion concentration ~ 10g / L) for 25 days, and then the higher-grade waste rocks are covered, and the spraying is continued Leach copper. After the...

Embodiment 2

[0036] A mine produces 10 million tons of secondary copper sulfide ore each year, including 6 million tons of higher-grade waste rock with a copper grade > 0.05% (average copper grade 0.13%), and 4 million tons of lower-grade waste rock with a copper grade < 0.05% tons (average copper grade 0.036%). The copper minerals are mainly chalcocite and copper blue, containing a small amount of refractory copper minerals, such as pyrite; the content of pyrite is relatively high (average content 5.60%), and copper minerals and pyrite are closely symbiotic; veins The stone minerals are mainly quartz, and the content of acid-consuming gangue is low. The two waste rocks are piled separately. Higher-grade waste rocks are stacked at a height of 10m per layer, continuously sprayed with raffinate (sulfuric acid concentration ~ 10g / L, iron ion concentration ~ 10g / L) for 35 days, and then covered with higher-grade waste rocks, and continue to spray Leach copper. After the low-grade waste rock...

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Abstract

The invention relates to a waste rock recycling disposal method for a refuse dump. The method sequentially comprises the steps that secondary copper sulfide waste rocks are classified and stacked withthe copper grade being 0.05% as the boundary, high-grade ores are rapidly sprayed and leached, low-grade waste rocks are sprayed with wet cloth bacteria, natural weathering leaching is conducted, extraction and electrodeposition are conducted, product copper and raffinate are obtained, and the waste rocks can be discharged, sprayed with the wet cloth bacteria, stacked and reclaimed. The waste rock recycling disposal method has the advantages of being easy to operate, high in copper recovery rate, low in production cost, good in environment, easy to industrialize and the like, can provide a wide space for waste rock recycling of refuse dumps at home and abroad, and is suitable for being applied to the mining and metallurgy industry.

Description

technical field [0001] The invention relates to a resource disposal method for waste rock in a dump site, which is suitable for application in the mining and metallurgy industry. Background technique [0002] For the reclamation of dumps, especially those of metal mines, a layer of loess is usually covered on the surface of waste rocks before reclamation. Due to natural weathering, exposure to the sun and rain, metal sulfides such as pyrite in the waste rock will be oxidized, producing acidic wastewater from the mine, which will cause certain pollution to the surrounding environment and water bodies. In addition, there is a large amount of waste rock in the dump. Although the valuable metal content of the waste rock is low, the overall amount of valuable metal is large, and a large amount of valuable metal has not been utilized, resulting in a huge waste of resources. [0003] Aiming at the problem of comprehensive utilization of copper-containing waste rocks in dumps, Jian...

Claims

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Application Information

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IPC IPC(8): C22B7/00C25C1/12C22B3/08C22B3/18C22B15/00A01B79/00
CPCC22B7/007C25C1/12C22B3/18C22B15/0071A01B79/00Y02P10/20
Inventor 蓝碧波巫銮东黄怀国沈贤德谭希发王春
Owner ZIJIN MINING GROUP
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