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Biological-chemical metallurgy method by jointly utilizing oxidized ore and sulfide ore

A technology of chemical metallurgy and sulfide ore, which is applied in the return leaching stage of sulfur dioxide biological oxidation to sulfuric acid, oxidative leaching of sulfide ore, and metal sulfate reduction pyrolysis. Yield impact and other issues, to achieve good promotion value, easy control, environment-friendly effect

Inactive Publication Date: 2009-12-23
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses reduction smelting to enrich manganese, produces manganese-rich slag, and can effectively recover six kinds of valuable metals. It is one of the better ways to utilize manganese nodules, but the energy consumption is high. The route is relatively long, and the industrialization yield is affected
[0006] It can be seen that the treatment of low-grade complex minerals needs to destroy the mineral structure through strong chemical redox reaction conditions, accompanied by cumbersome purification processes, making its industrialization very difficult

Method used

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  • Biological-chemical metallurgy method by jointly utilizing oxidized ore and sulfide ore
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  • Biological-chemical metallurgy method by jointly utilizing oxidized ore and sulfide ore

Examples

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Effect test

Embodiment 1

[0046] Example 1 Co-leaching of clay-type vanadium ore and pyrite

[0047] Clay vanadium ore is based on SiO 2 The clay-type vanadium pentoxide mineral used as the matrix is ​​currently used in the process of sodium roasting and water immersion extraction, which has high energy consumption and low efficiency. In particular, the reaction process produces a large amount of toxic chlorine gas, which is extremely harmful to the environment and workers' health. By using the method, firstly, the oxidized vanadium pentoxide ore is pre-sorted into granular and fine-grained minerals. Fine-grained minerals are subjected to tank leaching, and massive minerals are subjected to heap leaching to be leached together with pyrite. T.f ore leaching microorganisms are selected, and the acidic environment is adjusted under normal temperature and pressure, and the vanadium pentoxide ore is reduced and leached. During the leaching process, microorganisms reduce the insoluble pentavalent vanadium...

Embodiment 2

[0071] Oceanic manganese nodules are widely distributed on the seabed at a water depth of 5,000 to 6,000 meters. They are oxidized minerals and contain more than 70 elements. The average grades of nickel and manganese are (%): nickel 1.30, manganese 25.00, and have high economic value. It is a mineral resource that can be replaced by human beings. China Jinchuan Group currently owns hundreds of millions of tons of low-grade nickel sulfide ore. By adopting the technology of the invention, the two kinds of minerals can be used together, and the safety of strategic metals can be greatly improved.

[0072] 1) Raw material preparation

[0073] Oceanic manganese nodules were collected in the eastern Pacific Ocean by China's "Ocean No. 1" voyage DY105-13. According to detection and analysis, oceanic manganese nodules are a multi-mineral aggregate, mainly manganese minerals, iron minerals and aluminosilicate minerals. , Copper, cobalt, nickel and other metals exist in the crystal la...

Embodiment 3

[0094] Waste molasses, a by-product of the sucrose industry, is mainly used in the production of alcohol, yeast, organic acids (monosodium glutamate, citric acid), etc. About 15 tons of waste liquid is discharged for every ton of alcohol produced. At present, the annual discharge of such waste liquid in my country is more than 6 million tons. Select the representative manganese ore rich in Guilin, Guangxi in China, use sphalerite as the reducing agent, and add organic waste (molasses alcohol waste liquid) as the reducing agent and culture medium for bacteria, and mix in T.f, T.t and L.f Under the action of bacteria and heterotrophic microorganism Geobacter metallireducens, the manganese is leached and recovered, and the organic waste liquid is treated.

[0095] 1) Raw material preparation

[0096] Manganese ore is taken from a mine in Guangxi, the manganese ore grade is 25.8%, sphalerite is taken from a mine in China, the zinc grade is: Zn51.15%. Grind the two ores to -200 m...

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Abstract

The invention belongs to the field of mineral resource comprehensive utilization, and relates to methods for reduced leaching of oxidized ore and oxidation leaching of sulfide ore through biological and chemical catalysis, in particular to a biological-chemical metallurgy method by jointly utilizing the oxidized ore and the sulfide ore. The reduced leaching of the metal oxidized ore and the oxidation leaching of the metal sulfide ore are realized by utilizing auxoautotrophs, auxohetertrophs or a mixture thereof under mild conditions; and the mixture ratio of the metal oxidized ore to the metal sulfide ore can be adjusted by adding organic biomass. The leachate is purified, concentrated and crystallized into metal sulfates which are then reduced and thermally decomposed into products of sulfur dioxide and metal oxides; and the sulfur dioxide is subjected to biological oxidation to prepare sulphuric acid for recycling.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of mineral resources, and relates to biological and chemical catalyzed reduction leaching of oxidized ores, a method for oxidative leaching of sulfide ores, reduction pyrolysis of metal sulfate generated by leaching, and a method for producing sulfuric acid by biological oxidation of sulfur dioxide and returning to the leaching stage . Background technique [0002] In the past few decades, the comprehensive application of biology, chemistry, materials science and engineering disciplines to improve the mineral biology technology of microorganisms in mineral processing, heavy metal pollution control, and mineralized material preparation has made great progress. The driving force is that biotechnology can be carried out at different levels of complexity and technology investment and implementation. Compared with traditional processing technology, biomineral processing technology has the chara...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/18C22B3/04
CPCY02P10/20
Inventor 李浩然杜竹玮
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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